1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/drivers/video/omap2/dss/dsi.c
4 *
5 * Copyright (C) 2009 Nokia Corporation
6 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7 */
8
9 #define DSS_SUBSYS_NAME "DSI"
10
11 #include <linux/kernel.h>
12 #include <linux/io.h>
13 #include <linux/clk.h>
14 #include <linux/device.h>
15 #include <linux/err.h>
16 #include <linux/interrupt.h>
17 #include <linux/delay.h>
18 #include <linux/mutex.h>
19 #include <linux/module.h>
20 #include <linux/semaphore.h>
21 #include <linux/seq_file.h>
22 #include <linux/platform_device.h>
23 #include <linux/regulator/consumer.h>
24 #include <linux/wait.h>
25 #include <linux/workqueue.h>
26 #include <linux/sched.h>
27 #include <linux/slab.h>
28 #include <linux/debugfs.h>
29 #include <linux/pm_runtime.h>
30 #include <linux/of.h>
31 #include <linux/of_graph.h>
32 #include <linux/of_platform.h>
33 #include <linux/component.h>
34
35 #include <video/omapfb_dss.h>
36 #include <video/mipi_display.h>
37
38 #include "dss.h"
39 #include "dss_features.h"
40
41 #define DSI_CATCH_MISSING_TE
42
43 struct dsi_reg { u16 module; u16 idx; };
44
45 #define DSI_REG(mod, idx) ((const struct dsi_reg) { mod, idx })
46
47 /* DSI Protocol Engine */
48
49 #define DSI_PROTO 0
50 #define DSI_PROTO_SZ 0x200
51
52 #define DSI_REVISION DSI_REG(DSI_PROTO, 0x0000)
53 #define DSI_SYSCONFIG DSI_REG(DSI_PROTO, 0x0010)
54 #define DSI_SYSSTATUS DSI_REG(DSI_PROTO, 0x0014)
55 #define DSI_IRQSTATUS DSI_REG(DSI_PROTO, 0x0018)
56 #define DSI_IRQENABLE DSI_REG(DSI_PROTO, 0x001C)
57 #define DSI_CTRL DSI_REG(DSI_PROTO, 0x0040)
58 #define DSI_GNQ DSI_REG(DSI_PROTO, 0x0044)
59 #define DSI_COMPLEXIO_CFG1 DSI_REG(DSI_PROTO, 0x0048)
60 #define DSI_COMPLEXIO_IRQ_STATUS DSI_REG(DSI_PROTO, 0x004C)
61 #define DSI_COMPLEXIO_IRQ_ENABLE DSI_REG(DSI_PROTO, 0x0050)
62 #define DSI_CLK_CTRL DSI_REG(DSI_PROTO, 0x0054)
63 #define DSI_TIMING1 DSI_REG(DSI_PROTO, 0x0058)
64 #define DSI_TIMING2 DSI_REG(DSI_PROTO, 0x005C)
65 #define DSI_VM_TIMING1 DSI_REG(DSI_PROTO, 0x0060)
66 #define DSI_VM_TIMING2 DSI_REG(DSI_PROTO, 0x0064)
67 #define DSI_VM_TIMING3 DSI_REG(DSI_PROTO, 0x0068)
68 #define DSI_CLK_TIMING DSI_REG(DSI_PROTO, 0x006C)
69 #define DSI_TX_FIFO_VC_SIZE DSI_REG(DSI_PROTO, 0x0070)
70 #define DSI_RX_FIFO_VC_SIZE DSI_REG(DSI_PROTO, 0x0074)
71 #define DSI_COMPLEXIO_CFG2 DSI_REG(DSI_PROTO, 0x0078)
72 #define DSI_RX_FIFO_VC_FULLNESS DSI_REG(DSI_PROTO, 0x007C)
73 #define DSI_VM_TIMING4 DSI_REG(DSI_PROTO, 0x0080)
74 #define DSI_TX_FIFO_VC_EMPTINESS DSI_REG(DSI_PROTO, 0x0084)
75 #define DSI_VM_TIMING5 DSI_REG(DSI_PROTO, 0x0088)
76 #define DSI_VM_TIMING6 DSI_REG(DSI_PROTO, 0x008C)
77 #define DSI_VM_TIMING7 DSI_REG(DSI_PROTO, 0x0090)
78 #define DSI_STOPCLK_TIMING DSI_REG(DSI_PROTO, 0x0094)
79 #define DSI_VC_CTRL(n) DSI_REG(DSI_PROTO, 0x0100 + (n * 0x20))
80 #define DSI_VC_TE(n) DSI_REG(DSI_PROTO, 0x0104 + (n * 0x20))
81 #define DSI_VC_LONG_PACKET_HEADER(n) DSI_REG(DSI_PROTO, 0x0108 + (n * 0x20))
82 #define DSI_VC_LONG_PACKET_PAYLOAD(n) DSI_REG(DSI_PROTO, 0x010C + (n * 0x20))
83 #define DSI_VC_SHORT_PACKET_HEADER(n) DSI_REG(DSI_PROTO, 0x0110 + (n * 0x20))
84 #define DSI_VC_IRQSTATUS(n) DSI_REG(DSI_PROTO, 0x0118 + (n * 0x20))
85 #define DSI_VC_IRQENABLE(n) DSI_REG(DSI_PROTO, 0x011C + (n * 0x20))
86
87 /* DSIPHY_SCP */
88
89 #define DSI_PHY 1
90 #define DSI_PHY_OFFSET 0x200
91 #define DSI_PHY_SZ 0x40
92
93 #define DSI_DSIPHY_CFG0 DSI_REG(DSI_PHY, 0x0000)
94 #define DSI_DSIPHY_CFG1 DSI_REG(DSI_PHY, 0x0004)
95 #define DSI_DSIPHY_CFG2 DSI_REG(DSI_PHY, 0x0008)
96 #define DSI_DSIPHY_CFG5 DSI_REG(DSI_PHY, 0x0014)
97 #define DSI_DSIPHY_CFG10 DSI_REG(DSI_PHY, 0x0028)
98
99 /* DSI_PLL_CTRL_SCP */
100
101 #define DSI_PLL 2
102 #define DSI_PLL_OFFSET 0x300
103 #define DSI_PLL_SZ 0x20
104
105 #define DSI_PLL_CONTROL DSI_REG(DSI_PLL, 0x0000)
106 #define DSI_PLL_STATUS DSI_REG(DSI_PLL, 0x0004)
107 #define DSI_PLL_GO DSI_REG(DSI_PLL, 0x0008)
108 #define DSI_PLL_CONFIGURATION1 DSI_REG(DSI_PLL, 0x000C)
109 #define DSI_PLL_CONFIGURATION2 DSI_REG(DSI_PLL, 0x0010)
110
111 #define REG_GET(dsidev, idx, start, end) \
112 FLD_GET(dsi_read_reg(dsidev, idx), start, end)
113
114 #define REG_FLD_MOD(dsidev, idx, val, start, end) \
115 dsi_write_reg(dsidev, idx, FLD_MOD(dsi_read_reg(dsidev, idx), val, start, end))
116
117 /* Global interrupts */
118 #define DSI_IRQ_VC0 (1 << 0)
119 #define DSI_IRQ_VC1 (1 << 1)
120 #define DSI_IRQ_VC2 (1 << 2)
121 #define DSI_IRQ_VC3 (1 << 3)
122 #define DSI_IRQ_WAKEUP (1 << 4)
123 #define DSI_IRQ_RESYNC (1 << 5)
124 #define DSI_IRQ_PLL_LOCK (1 << 7)
125 #define DSI_IRQ_PLL_UNLOCK (1 << 8)
126 #define DSI_IRQ_PLL_RECALL (1 << 9)
127 #define DSI_IRQ_COMPLEXIO_ERR (1 << 10)
128 #define DSI_IRQ_HS_TX_TIMEOUT (1 << 14)
129 #define DSI_IRQ_LP_RX_TIMEOUT (1 << 15)
130 #define DSI_IRQ_TE_TRIGGER (1 << 16)
131 #define DSI_IRQ_ACK_TRIGGER (1 << 17)
132 #define DSI_IRQ_SYNC_LOST (1 << 18)
133 #define DSI_IRQ_LDO_POWER_GOOD (1 << 19)
134 #define DSI_IRQ_TA_TIMEOUT (1 << 20)
135 #define DSI_IRQ_ERROR_MASK \
136 (DSI_IRQ_HS_TX_TIMEOUT | DSI_IRQ_LP_RX_TIMEOUT | DSI_IRQ_SYNC_LOST | \
137 DSI_IRQ_TA_TIMEOUT)
138 #define DSI_IRQ_CHANNEL_MASK 0xf
139
140 /* Virtual channel interrupts */
141 #define DSI_VC_IRQ_CS (1 << 0)
142 #define DSI_VC_IRQ_ECC_CORR (1 << 1)
143 #define DSI_VC_IRQ_PACKET_SENT (1 << 2)
144 #define DSI_VC_IRQ_FIFO_TX_OVF (1 << 3)
145 #define DSI_VC_IRQ_FIFO_RX_OVF (1 << 4)
146 #define DSI_VC_IRQ_BTA (1 << 5)
147 #define DSI_VC_IRQ_ECC_NO_CORR (1 << 6)
148 #define DSI_VC_IRQ_FIFO_TX_UDF (1 << 7)
149 #define DSI_VC_IRQ_PP_BUSY_CHANGE (1 << 8)
150 #define DSI_VC_IRQ_ERROR_MASK \
151 (DSI_VC_IRQ_CS | DSI_VC_IRQ_ECC_CORR | DSI_VC_IRQ_FIFO_TX_OVF | \
152 DSI_VC_IRQ_FIFO_RX_OVF | DSI_VC_IRQ_ECC_NO_CORR | \
153 DSI_VC_IRQ_FIFO_TX_UDF)
154
155 /* ComplexIO interrupts */
156 #define DSI_CIO_IRQ_ERRSYNCESC1 (1 << 0)
157 #define DSI_CIO_IRQ_ERRSYNCESC2 (1 << 1)
158 #define DSI_CIO_IRQ_ERRSYNCESC3 (1 << 2)
159 #define DSI_CIO_IRQ_ERRSYNCESC4 (1 << 3)
160 #define DSI_CIO_IRQ_ERRSYNCESC5 (1 << 4)
161 #define DSI_CIO_IRQ_ERRESC1 (1 << 5)
162 #define DSI_CIO_IRQ_ERRESC2 (1 << 6)
163 #define DSI_CIO_IRQ_ERRESC3 (1 << 7)
164 #define DSI_CIO_IRQ_ERRESC4 (1 << 8)
165 #define DSI_CIO_IRQ_ERRESC5 (1 << 9)
166 #define DSI_CIO_IRQ_ERRCONTROL1 (1 << 10)
167 #define DSI_CIO_IRQ_ERRCONTROL2 (1 << 11)
168 #define DSI_CIO_IRQ_ERRCONTROL3 (1 << 12)
169 #define DSI_CIO_IRQ_ERRCONTROL4 (1 << 13)
170 #define DSI_CIO_IRQ_ERRCONTROL5 (1 << 14)
171 #define DSI_CIO_IRQ_STATEULPS1 (1 << 15)
172 #define DSI_CIO_IRQ_STATEULPS2 (1 << 16)
173 #define DSI_CIO_IRQ_STATEULPS3 (1 << 17)
174 #define DSI_CIO_IRQ_STATEULPS4 (1 << 18)
175 #define DSI_CIO_IRQ_STATEULPS5 (1 << 19)
176 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_1 (1 << 20)
177 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_1 (1 << 21)
178 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_2 (1 << 22)
179 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_2 (1 << 23)
180 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_3 (1 << 24)
181 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_3 (1 << 25)
182 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_4 (1 << 26)
183 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_4 (1 << 27)
184 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_5 (1 << 28)
185 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_5 (1 << 29)
186 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL0 (1 << 30)
187 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL1 (1 << 31)
188 #define DSI_CIO_IRQ_ERROR_MASK \
189 (DSI_CIO_IRQ_ERRSYNCESC1 | DSI_CIO_IRQ_ERRSYNCESC2 | \
190 DSI_CIO_IRQ_ERRSYNCESC3 | DSI_CIO_IRQ_ERRSYNCESC4 | \
191 DSI_CIO_IRQ_ERRSYNCESC5 | \
192 DSI_CIO_IRQ_ERRESC1 | DSI_CIO_IRQ_ERRESC2 | \
193 DSI_CIO_IRQ_ERRESC3 | DSI_CIO_IRQ_ERRESC4 | \
194 DSI_CIO_IRQ_ERRESC5 | \
195 DSI_CIO_IRQ_ERRCONTROL1 | DSI_CIO_IRQ_ERRCONTROL2 | \
196 DSI_CIO_IRQ_ERRCONTROL3 | DSI_CIO_IRQ_ERRCONTROL4 | \
197 DSI_CIO_IRQ_ERRCONTROL5 | \
198 DSI_CIO_IRQ_ERRCONTENTIONLP0_1 | DSI_CIO_IRQ_ERRCONTENTIONLP1_1 | \
199 DSI_CIO_IRQ_ERRCONTENTIONLP0_2 | DSI_CIO_IRQ_ERRCONTENTIONLP1_2 | \
200 DSI_CIO_IRQ_ERRCONTENTIONLP0_3 | DSI_CIO_IRQ_ERRCONTENTIONLP1_3 | \
201 DSI_CIO_IRQ_ERRCONTENTIONLP0_4 | DSI_CIO_IRQ_ERRCONTENTIONLP1_4 | \
202 DSI_CIO_IRQ_ERRCONTENTIONLP0_5 | DSI_CIO_IRQ_ERRCONTENTIONLP1_5)
203
204 typedef void (*omap_dsi_isr_t) (void *arg, u32 mask);
205
206 static int dsi_display_init_dispc(struct platform_device *dsidev,
207 struct omap_overlay_manager *mgr);
208 static void dsi_display_uninit_dispc(struct platform_device *dsidev,
209 struct omap_overlay_manager *mgr);
210
211 static int dsi_vc_send_null(struct omap_dss_device *dssdev, int channel);
212
213 /* DSI PLL HSDIV indices */
214 #define HSDIV_DISPC 0
215 #define HSDIV_DSI 1
216
217 #define DSI_MAX_NR_ISRS 2
218 #define DSI_MAX_NR_LANES 5
219
220 enum dsi_lane_function {
221 DSI_LANE_UNUSED = 0,
222 DSI_LANE_CLK,
223 DSI_LANE_DATA1,
224 DSI_LANE_DATA2,
225 DSI_LANE_DATA3,
226 DSI_LANE_DATA4,
227 };
228
229 struct dsi_lane_config {
230 enum dsi_lane_function function;
231 u8 polarity;
232 };
233
234 struct dsi_isr_data {
235 omap_dsi_isr_t isr;
236 void *arg;
237 u32 mask;
238 };
239
240 enum fifo_size {
241 DSI_FIFO_SIZE_0 = 0,
242 DSI_FIFO_SIZE_32 = 1,
243 DSI_FIFO_SIZE_64 = 2,
244 DSI_FIFO_SIZE_96 = 3,
245 DSI_FIFO_SIZE_128 = 4,
246 };
247
248 enum dsi_vc_source {
249 DSI_VC_SOURCE_L4 = 0,
250 DSI_VC_SOURCE_VP,
251 };
252
253 struct dsi_irq_stats {
254 unsigned long last_reset;
255 unsigned irq_count;
256 unsigned dsi_irqs[32];
257 unsigned vc_irqs[4][32];
258 unsigned cio_irqs[32];
259 };
260
261 struct dsi_isr_tables {
262 struct dsi_isr_data isr_table[DSI_MAX_NR_ISRS];
263 struct dsi_isr_data isr_table_vc[4][DSI_MAX_NR_ISRS];
264 struct dsi_isr_data isr_table_cio[DSI_MAX_NR_ISRS];
265 };
266
267 struct dsi_clk_calc_ctx {
268 struct platform_device *dsidev;
269 struct dss_pll *pll;
270
271 /* inputs */
272
273 const struct omap_dss_dsi_config *config;
274
275 unsigned long req_pck_min, req_pck_nom, req_pck_max;
276
277 /* outputs */
278
279 struct dss_pll_clock_info dsi_cinfo;
280 struct dispc_clock_info dispc_cinfo;
281
282 struct omap_video_timings dispc_vm;
283 struct omap_dss_dsi_videomode_timings dsi_vm;
284 };
285
286 struct dsi_lp_clock_info {
287 unsigned long lp_clk;
288 u16 lp_clk_div;
289 };
290
291 struct dsi_data {
292 struct platform_device *pdev;
293 void __iomem *proto_base;
294 void __iomem *phy_base;
295 void __iomem *pll_base;
296
297 int module_id;
298
299 int irq;
300
301 bool is_enabled;
302
303 struct clk *dss_clk;
304
305 struct dispc_clock_info user_dispc_cinfo;
306 struct dss_pll_clock_info user_dsi_cinfo;
307
308 struct dsi_lp_clock_info user_lp_cinfo;
309 struct dsi_lp_clock_info current_lp_cinfo;
310
311 struct dss_pll pll;
312
313 bool vdds_dsi_enabled;
314 struct regulator *vdds_dsi_reg;
315
316 struct {
317 enum dsi_vc_source source;
318 struct omap_dss_device *dssdev;
319 enum fifo_size tx_fifo_size;
320 enum fifo_size rx_fifo_size;
321 int vc_id;
322 } vc[4];
323
324 struct mutex lock;
325 struct semaphore bus_lock;
326
327 spinlock_t irq_lock;
328 struct dsi_isr_tables isr_tables;
329 /* space for a copy used by the interrupt handler */
330 struct dsi_isr_tables isr_tables_copy;
331
332 int update_channel;
333 #ifdef DSI_PERF_MEASURE
334 unsigned update_bytes;
335 #endif
336
337 bool te_enabled;
338 bool ulps_enabled;
339
340 void (*framedone_callback)(int, void *);
341 void *framedone_data;
342
343 struct delayed_work framedone_timeout_work;
344
345 #ifdef DSI_CATCH_MISSING_TE
346 struct timer_list te_timer;
347 #endif
348
349 unsigned long cache_req_pck;
350 unsigned long cache_clk_freq;
351 struct dss_pll_clock_info cache_cinfo;
352
353 u32 errors;
354 spinlock_t errors_lock;
355 #ifdef DSI_PERF_MEASURE
356 ktime_t perf_setup_time;
357 ktime_t perf_start_time;
358 #endif
359 int debug_read;
360 int debug_write;
361
362 #ifdef CONFIG_FB_OMAP2_DSS_COLLECT_IRQ_STATS
363 spinlock_t irq_stats_lock;
364 struct dsi_irq_stats irq_stats;
365 #endif
366
367 unsigned num_lanes_supported;
368 unsigned line_buffer_size;
369
370 struct dsi_lane_config lanes[DSI_MAX_NR_LANES];
371 unsigned num_lanes_used;
372
373 unsigned scp_clk_refcount;
374
375 struct dss_lcd_mgr_config mgr_config;
376 struct omap_video_timings timings;
377 enum omap_dss_dsi_pixel_format pix_fmt;
378 enum omap_dss_dsi_mode mode;
379 struct omap_dss_dsi_videomode_timings vm_timings;
380
381 struct omap_dss_device output;
382 };
383
384 struct dsi_packet_sent_handler_data {
385 struct platform_device *dsidev;
386 struct completion *completion;
387 };
388
389 struct dsi_module_id_data {
390 u32 address;
391 int id;
392 };
393
394 static const struct of_device_id dsi_of_match[];
395
396 #ifdef DSI_PERF_MEASURE
397 static bool dsi_perf;
398 module_param(dsi_perf, bool, 0644);
399 #endif
400
dsi_get_dsidrv_data(struct platform_device * dsidev)401 static inline struct dsi_data *dsi_get_dsidrv_data(struct platform_device *dsidev)
402 {
403 return platform_get_drvdata(dsidev);
404 }
405
dsi_get_dsidev_from_dssdev(struct omap_dss_device * dssdev)406 static inline struct platform_device *dsi_get_dsidev_from_dssdev(struct omap_dss_device *dssdev)
407 {
408 return to_platform_device(dssdev->dev);
409 }
410
dsi_get_dsidev_from_id(int module)411 static struct platform_device *dsi_get_dsidev_from_id(int module)
412 {
413 struct omap_dss_device *out;
414 enum omap_dss_output_id id;
415
416 switch (module) {
417 case 0:
418 id = OMAP_DSS_OUTPUT_DSI1;
419 break;
420 case 1:
421 id = OMAP_DSS_OUTPUT_DSI2;
422 break;
423 default:
424 return NULL;
425 }
426
427 out = omap_dss_get_output(id);
428
429 return out ? to_platform_device(out->dev) : NULL;
430 }
431
dsi_write_reg(struct platform_device * dsidev,const struct dsi_reg idx,u32 val)432 static inline void dsi_write_reg(struct platform_device *dsidev,
433 const struct dsi_reg idx, u32 val)
434 {
435 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
436 void __iomem *base;
437
438 switch(idx.module) {
439 case DSI_PROTO: base = dsi->proto_base; break;
440 case DSI_PHY: base = dsi->phy_base; break;
441 case DSI_PLL: base = dsi->pll_base; break;
442 default: return;
443 }
444
445 __raw_writel(val, base + idx.idx);
446 }
447
dsi_read_reg(struct platform_device * dsidev,const struct dsi_reg idx)448 static inline u32 dsi_read_reg(struct platform_device *dsidev,
449 const struct dsi_reg idx)
450 {
451 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
452 void __iomem *base;
453
454 switch(idx.module) {
455 case DSI_PROTO: base = dsi->proto_base; break;
456 case DSI_PHY: base = dsi->phy_base; break;
457 case DSI_PLL: base = dsi->pll_base; break;
458 default: return 0;
459 }
460
461 return __raw_readl(base + idx.idx);
462 }
463
dsi_bus_lock(struct omap_dss_device * dssdev)464 static void dsi_bus_lock(struct omap_dss_device *dssdev)
465 {
466 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
467 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
468
469 down(&dsi->bus_lock);
470 }
471
dsi_bus_unlock(struct omap_dss_device * dssdev)472 static void dsi_bus_unlock(struct omap_dss_device *dssdev)
473 {
474 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
475 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
476
477 up(&dsi->bus_lock);
478 }
479
dsi_bus_is_locked(struct platform_device * dsidev)480 static bool dsi_bus_is_locked(struct platform_device *dsidev)
481 {
482 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
483
484 return dsi->bus_lock.count == 0;
485 }
486
dsi_completion_handler(void * data,u32 mask)487 static void dsi_completion_handler(void *data, u32 mask)
488 {
489 complete((struct completion *)data);
490 }
491
wait_for_bit_change(struct platform_device * dsidev,const struct dsi_reg idx,int bitnum,int value)492 static inline int wait_for_bit_change(struct platform_device *dsidev,
493 const struct dsi_reg idx, int bitnum, int value)
494 {
495 unsigned long timeout;
496 ktime_t wait;
497 int t;
498
499 /* first busyloop to see if the bit changes right away */
500 t = 100;
501 while (t-- > 0) {
502 if (REG_GET(dsidev, idx, bitnum, bitnum) == value)
503 return value;
504 }
505
506 /* then loop for 500ms, sleeping for 1ms in between */
507 timeout = jiffies + msecs_to_jiffies(500);
508 while (time_before(jiffies, timeout)) {
509 if (REG_GET(dsidev, idx, bitnum, bitnum) == value)
510 return value;
511
512 wait = ns_to_ktime(1000 * 1000);
513 set_current_state(TASK_UNINTERRUPTIBLE);
514 schedule_hrtimeout(&wait, HRTIMER_MODE_REL);
515 }
516
517 return !value;
518 }
519
dsi_get_pixel_size(enum omap_dss_dsi_pixel_format fmt)520 u8 dsi_get_pixel_size(enum omap_dss_dsi_pixel_format fmt)
521 {
522 switch (fmt) {
523 case OMAP_DSS_DSI_FMT_RGB888:
524 case OMAP_DSS_DSI_FMT_RGB666:
525 return 24;
526 case OMAP_DSS_DSI_FMT_RGB666_PACKED:
527 return 18;
528 case OMAP_DSS_DSI_FMT_RGB565:
529 return 16;
530 default:
531 BUG();
532 return 0;
533 }
534 }
535
536 #ifdef DSI_PERF_MEASURE
dsi_perf_mark_setup(struct platform_device * dsidev)537 static void dsi_perf_mark_setup(struct platform_device *dsidev)
538 {
539 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
540 dsi->perf_setup_time = ktime_get();
541 }
542
dsi_perf_mark_start(struct platform_device * dsidev)543 static void dsi_perf_mark_start(struct platform_device *dsidev)
544 {
545 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
546 dsi->perf_start_time = ktime_get();
547 }
548
dsi_perf_show(struct platform_device * dsidev,const char * name)549 static void dsi_perf_show(struct platform_device *dsidev, const char *name)
550 {
551 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
552 ktime_t t, setup_time, trans_time;
553 u32 total_bytes;
554 u32 setup_us, trans_us, total_us;
555
556 if (!dsi_perf)
557 return;
558
559 t = ktime_get();
560
561 setup_time = ktime_sub(dsi->perf_start_time, dsi->perf_setup_time);
562 setup_us = (u32)ktime_to_us(setup_time);
563 if (setup_us == 0)
564 setup_us = 1;
565
566 trans_time = ktime_sub(t, dsi->perf_start_time);
567 trans_us = (u32)ktime_to_us(trans_time);
568 if (trans_us == 0)
569 trans_us = 1;
570
571 total_us = setup_us + trans_us;
572
573 total_bytes = dsi->update_bytes;
574
575 printk(KERN_INFO "DSI(%s): %u us + %u us = %u us (%uHz), "
576 "%u bytes, %u kbytes/sec\n",
577 name,
578 setup_us,
579 trans_us,
580 total_us,
581 1000*1000 / total_us,
582 total_bytes,
583 total_bytes * 1000 / total_us);
584 }
585 #else
dsi_perf_mark_setup(struct platform_device * dsidev)586 static inline void dsi_perf_mark_setup(struct platform_device *dsidev)
587 {
588 }
589
dsi_perf_mark_start(struct platform_device * dsidev)590 static inline void dsi_perf_mark_start(struct platform_device *dsidev)
591 {
592 }
593
dsi_perf_show(struct platform_device * dsidev,const char * name)594 static inline void dsi_perf_show(struct platform_device *dsidev,
595 const char *name)
596 {
597 }
598 #endif
599
600 static int verbose_irq;
601
print_irq_status(u32 status)602 static void print_irq_status(u32 status)
603 {
604 if (status == 0)
605 return;
606
607 if (!verbose_irq && (status & ~DSI_IRQ_CHANNEL_MASK) == 0)
608 return;
609
610 #define PIS(x) (status & DSI_IRQ_##x) ? (#x " ") : ""
611
612 pr_debug("DSI IRQ: 0x%x: %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
613 status,
614 verbose_irq ? PIS(VC0) : "",
615 verbose_irq ? PIS(VC1) : "",
616 verbose_irq ? PIS(VC2) : "",
617 verbose_irq ? PIS(VC3) : "",
618 PIS(WAKEUP),
619 PIS(RESYNC),
620 PIS(PLL_LOCK),
621 PIS(PLL_UNLOCK),
622 PIS(PLL_RECALL),
623 PIS(COMPLEXIO_ERR),
624 PIS(HS_TX_TIMEOUT),
625 PIS(LP_RX_TIMEOUT),
626 PIS(TE_TRIGGER),
627 PIS(ACK_TRIGGER),
628 PIS(SYNC_LOST),
629 PIS(LDO_POWER_GOOD),
630 PIS(TA_TIMEOUT));
631 #undef PIS
632 }
633
print_irq_status_vc(int channel,u32 status)634 static void print_irq_status_vc(int channel, u32 status)
635 {
636 if (status == 0)
637 return;
638
639 if (!verbose_irq && (status & ~DSI_VC_IRQ_PACKET_SENT) == 0)
640 return;
641
642 #define PIS(x) (status & DSI_VC_IRQ_##x) ? (#x " ") : ""
643
644 pr_debug("DSI VC(%d) IRQ 0x%x: %s%s%s%s%s%s%s%s%s\n",
645 channel,
646 status,
647 PIS(CS),
648 PIS(ECC_CORR),
649 PIS(ECC_NO_CORR),
650 verbose_irq ? PIS(PACKET_SENT) : "",
651 PIS(BTA),
652 PIS(FIFO_TX_OVF),
653 PIS(FIFO_RX_OVF),
654 PIS(FIFO_TX_UDF),
655 PIS(PP_BUSY_CHANGE));
656 #undef PIS
657 }
658
print_irq_status_cio(u32 status)659 static void print_irq_status_cio(u32 status)
660 {
661 if (status == 0)
662 return;
663
664 #define PIS(x) (status & DSI_CIO_IRQ_##x) ? (#x " ") : ""
665
666 pr_debug("DSI CIO IRQ 0x%x: %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
667 status,
668 PIS(ERRSYNCESC1),
669 PIS(ERRSYNCESC2),
670 PIS(ERRSYNCESC3),
671 PIS(ERRESC1),
672 PIS(ERRESC2),
673 PIS(ERRESC3),
674 PIS(ERRCONTROL1),
675 PIS(ERRCONTROL2),
676 PIS(ERRCONTROL3),
677 PIS(STATEULPS1),
678 PIS(STATEULPS2),
679 PIS(STATEULPS3),
680 PIS(ERRCONTENTIONLP0_1),
681 PIS(ERRCONTENTIONLP1_1),
682 PIS(ERRCONTENTIONLP0_2),
683 PIS(ERRCONTENTIONLP1_2),
684 PIS(ERRCONTENTIONLP0_3),
685 PIS(ERRCONTENTIONLP1_3),
686 PIS(ULPSACTIVENOT_ALL0),
687 PIS(ULPSACTIVENOT_ALL1));
688 #undef PIS
689 }
690
691 #ifdef CONFIG_FB_OMAP2_DSS_COLLECT_IRQ_STATS
dsi_collect_irq_stats(struct platform_device * dsidev,u32 irqstatus,u32 * vcstatus,u32 ciostatus)692 static void dsi_collect_irq_stats(struct platform_device *dsidev, u32 irqstatus,
693 u32 *vcstatus, u32 ciostatus)
694 {
695 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
696 int i;
697
698 spin_lock(&dsi->irq_stats_lock);
699
700 dsi->irq_stats.irq_count++;
701 dss_collect_irq_stats(irqstatus, dsi->irq_stats.dsi_irqs);
702
703 for (i = 0; i < 4; ++i)
704 dss_collect_irq_stats(vcstatus[i], dsi->irq_stats.vc_irqs[i]);
705
706 dss_collect_irq_stats(ciostatus, dsi->irq_stats.cio_irqs);
707
708 spin_unlock(&dsi->irq_stats_lock);
709 }
710 #else
711 #define dsi_collect_irq_stats(dsidev, irqstatus, vcstatus, ciostatus)
712 #endif
713
714 static int debug_irq;
715
dsi_handle_irq_errors(struct platform_device * dsidev,u32 irqstatus,u32 * vcstatus,u32 ciostatus)716 static void dsi_handle_irq_errors(struct platform_device *dsidev, u32 irqstatus,
717 u32 *vcstatus, u32 ciostatus)
718 {
719 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
720 int i;
721
722 if (irqstatus & DSI_IRQ_ERROR_MASK) {
723 DSSERR("DSI error, irqstatus %x\n", irqstatus);
724 print_irq_status(irqstatus);
725 spin_lock(&dsi->errors_lock);
726 dsi->errors |= irqstatus & DSI_IRQ_ERROR_MASK;
727 spin_unlock(&dsi->errors_lock);
728 } else if (debug_irq) {
729 print_irq_status(irqstatus);
730 }
731
732 for (i = 0; i < 4; ++i) {
733 if (vcstatus[i] & DSI_VC_IRQ_ERROR_MASK) {
734 DSSERR("DSI VC(%d) error, vc irqstatus %x\n",
735 i, vcstatus[i]);
736 print_irq_status_vc(i, vcstatus[i]);
737 } else if (debug_irq) {
738 print_irq_status_vc(i, vcstatus[i]);
739 }
740 }
741
742 if (ciostatus & DSI_CIO_IRQ_ERROR_MASK) {
743 DSSERR("DSI CIO error, cio irqstatus %x\n", ciostatus);
744 print_irq_status_cio(ciostatus);
745 } else if (debug_irq) {
746 print_irq_status_cio(ciostatus);
747 }
748 }
749
dsi_call_isrs(struct dsi_isr_data * isr_array,unsigned isr_array_size,u32 irqstatus)750 static void dsi_call_isrs(struct dsi_isr_data *isr_array,
751 unsigned isr_array_size, u32 irqstatus)
752 {
753 struct dsi_isr_data *isr_data;
754 int i;
755
756 for (i = 0; i < isr_array_size; i++) {
757 isr_data = &isr_array[i];
758 if (isr_data->isr && isr_data->mask & irqstatus)
759 isr_data->isr(isr_data->arg, irqstatus);
760 }
761 }
762
dsi_handle_isrs(struct dsi_isr_tables * isr_tables,u32 irqstatus,u32 * vcstatus,u32 ciostatus)763 static void dsi_handle_isrs(struct dsi_isr_tables *isr_tables,
764 u32 irqstatus, u32 *vcstatus, u32 ciostatus)
765 {
766 int i;
767
768 dsi_call_isrs(isr_tables->isr_table,
769 ARRAY_SIZE(isr_tables->isr_table),
770 irqstatus);
771
772 for (i = 0; i < 4; ++i) {
773 if (vcstatus[i] == 0)
774 continue;
775 dsi_call_isrs(isr_tables->isr_table_vc[i],
776 ARRAY_SIZE(isr_tables->isr_table_vc[i]),
777 vcstatus[i]);
778 }
779
780 if (ciostatus != 0)
781 dsi_call_isrs(isr_tables->isr_table_cio,
782 ARRAY_SIZE(isr_tables->isr_table_cio),
783 ciostatus);
784 }
785
omap_dsi_irq_handler(int irq,void * arg)786 static irqreturn_t omap_dsi_irq_handler(int irq, void *arg)
787 {
788 struct platform_device *dsidev;
789 struct dsi_data *dsi;
790 u32 irqstatus, vcstatus[4], ciostatus;
791 int i;
792
793 dsidev = (struct platform_device *) arg;
794 dsi = dsi_get_dsidrv_data(dsidev);
795
796 if (!dsi->is_enabled)
797 return IRQ_NONE;
798
799 spin_lock(&dsi->irq_lock);
800
801 irqstatus = dsi_read_reg(dsidev, DSI_IRQSTATUS);
802
803 /* IRQ is not for us */
804 if (!irqstatus) {
805 spin_unlock(&dsi->irq_lock);
806 return IRQ_NONE;
807 }
808
809 dsi_write_reg(dsidev, DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK);
810 /* flush posted write */
811 dsi_read_reg(dsidev, DSI_IRQSTATUS);
812
813 for (i = 0; i < 4; ++i) {
814 if ((irqstatus & (1 << i)) == 0) {
815 vcstatus[i] = 0;
816 continue;
817 }
818
819 vcstatus[i] = dsi_read_reg(dsidev, DSI_VC_IRQSTATUS(i));
820
821 dsi_write_reg(dsidev, DSI_VC_IRQSTATUS(i), vcstatus[i]);
822 /* flush posted write */
823 dsi_read_reg(dsidev, DSI_VC_IRQSTATUS(i));
824 }
825
826 if (irqstatus & DSI_IRQ_COMPLEXIO_ERR) {
827 ciostatus = dsi_read_reg(dsidev, DSI_COMPLEXIO_IRQ_STATUS);
828
829 dsi_write_reg(dsidev, DSI_COMPLEXIO_IRQ_STATUS, ciostatus);
830 /* flush posted write */
831 dsi_read_reg(dsidev, DSI_COMPLEXIO_IRQ_STATUS);
832 } else {
833 ciostatus = 0;
834 }
835
836 #ifdef DSI_CATCH_MISSING_TE
837 if (irqstatus & DSI_IRQ_TE_TRIGGER)
838 timer_delete(&dsi->te_timer);
839 #endif
840
841 /* make a copy and unlock, so that isrs can unregister
842 * themselves */
843 memcpy(&dsi->isr_tables_copy, &dsi->isr_tables,
844 sizeof(dsi->isr_tables));
845
846 spin_unlock(&dsi->irq_lock);
847
848 dsi_handle_isrs(&dsi->isr_tables_copy, irqstatus, vcstatus, ciostatus);
849
850 dsi_handle_irq_errors(dsidev, irqstatus, vcstatus, ciostatus);
851
852 dsi_collect_irq_stats(dsidev, irqstatus, vcstatus, ciostatus);
853
854 return IRQ_HANDLED;
855 }
856
857 /* dsi->irq_lock has to be locked by the caller */
_omap_dsi_configure_irqs(struct platform_device * dsidev,struct dsi_isr_data * isr_array,unsigned isr_array_size,u32 default_mask,const struct dsi_reg enable_reg,const struct dsi_reg status_reg)858 static void _omap_dsi_configure_irqs(struct platform_device *dsidev,
859 struct dsi_isr_data *isr_array,
860 unsigned isr_array_size, u32 default_mask,
861 const struct dsi_reg enable_reg,
862 const struct dsi_reg status_reg)
863 {
864 struct dsi_isr_data *isr_data;
865 u32 mask;
866 u32 old_mask;
867 int i;
868
869 mask = default_mask;
870
871 for (i = 0; i < isr_array_size; i++) {
872 isr_data = &isr_array[i];
873
874 if (isr_data->isr == NULL)
875 continue;
876
877 mask |= isr_data->mask;
878 }
879
880 old_mask = dsi_read_reg(dsidev, enable_reg);
881 /* clear the irqstatus for newly enabled irqs */
882 dsi_write_reg(dsidev, status_reg, (mask ^ old_mask) & mask);
883 dsi_write_reg(dsidev, enable_reg, mask);
884
885 /* flush posted writes */
886 dsi_read_reg(dsidev, enable_reg);
887 dsi_read_reg(dsidev, status_reg);
888 }
889
890 /* dsi->irq_lock has to be locked by the caller */
_omap_dsi_set_irqs(struct platform_device * dsidev)891 static void _omap_dsi_set_irqs(struct platform_device *dsidev)
892 {
893 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
894 u32 mask = DSI_IRQ_ERROR_MASK;
895 #ifdef DSI_CATCH_MISSING_TE
896 mask |= DSI_IRQ_TE_TRIGGER;
897 #endif
898 _omap_dsi_configure_irqs(dsidev, dsi->isr_tables.isr_table,
899 ARRAY_SIZE(dsi->isr_tables.isr_table), mask,
900 DSI_IRQENABLE, DSI_IRQSTATUS);
901 }
902
903 /* dsi->irq_lock has to be locked by the caller */
_omap_dsi_set_irqs_vc(struct platform_device * dsidev,int vc)904 static void _omap_dsi_set_irqs_vc(struct platform_device *dsidev, int vc)
905 {
906 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
907
908 _omap_dsi_configure_irqs(dsidev, dsi->isr_tables.isr_table_vc[vc],
909 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[vc]),
910 DSI_VC_IRQ_ERROR_MASK,
911 DSI_VC_IRQENABLE(vc), DSI_VC_IRQSTATUS(vc));
912 }
913
914 /* dsi->irq_lock has to be locked by the caller */
_omap_dsi_set_irqs_cio(struct platform_device * dsidev)915 static void _omap_dsi_set_irqs_cio(struct platform_device *dsidev)
916 {
917 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
918
919 _omap_dsi_configure_irqs(dsidev, dsi->isr_tables.isr_table_cio,
920 ARRAY_SIZE(dsi->isr_tables.isr_table_cio),
921 DSI_CIO_IRQ_ERROR_MASK,
922 DSI_COMPLEXIO_IRQ_ENABLE, DSI_COMPLEXIO_IRQ_STATUS);
923 }
924
_dsi_initialize_irq(struct platform_device * dsidev)925 static void _dsi_initialize_irq(struct platform_device *dsidev)
926 {
927 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
928 unsigned long flags;
929 int vc;
930
931 spin_lock_irqsave(&dsi->irq_lock, flags);
932
933 memset(&dsi->isr_tables, 0, sizeof(dsi->isr_tables));
934
935 _omap_dsi_set_irqs(dsidev);
936 for (vc = 0; vc < 4; ++vc)
937 _omap_dsi_set_irqs_vc(dsidev, vc);
938 _omap_dsi_set_irqs_cio(dsidev);
939
940 spin_unlock_irqrestore(&dsi->irq_lock, flags);
941 }
942
_dsi_register_isr(omap_dsi_isr_t isr,void * arg,u32 mask,struct dsi_isr_data * isr_array,unsigned isr_array_size)943 static int _dsi_register_isr(omap_dsi_isr_t isr, void *arg, u32 mask,
944 struct dsi_isr_data *isr_array, unsigned isr_array_size)
945 {
946 struct dsi_isr_data *isr_data;
947 int free_idx;
948 int i;
949
950 BUG_ON(isr == NULL);
951
952 /* check for duplicate entry and find a free slot */
953 free_idx = -1;
954 for (i = 0; i < isr_array_size; i++) {
955 isr_data = &isr_array[i];
956
957 if (isr_data->isr == isr && isr_data->arg == arg &&
958 isr_data->mask == mask) {
959 return -EINVAL;
960 }
961
962 if (isr_data->isr == NULL && free_idx == -1)
963 free_idx = i;
964 }
965
966 if (free_idx == -1)
967 return -EBUSY;
968
969 isr_data = &isr_array[free_idx];
970 isr_data->isr = isr;
971 isr_data->arg = arg;
972 isr_data->mask = mask;
973
974 return 0;
975 }
976
_dsi_unregister_isr(omap_dsi_isr_t isr,void * arg,u32 mask,struct dsi_isr_data * isr_array,unsigned isr_array_size)977 static int _dsi_unregister_isr(omap_dsi_isr_t isr, void *arg, u32 mask,
978 struct dsi_isr_data *isr_array, unsigned isr_array_size)
979 {
980 struct dsi_isr_data *isr_data;
981 int i;
982
983 for (i = 0; i < isr_array_size; i++) {
984 isr_data = &isr_array[i];
985 if (isr_data->isr != isr || isr_data->arg != arg ||
986 isr_data->mask != mask)
987 continue;
988
989 isr_data->isr = NULL;
990 isr_data->arg = NULL;
991 isr_data->mask = 0;
992
993 return 0;
994 }
995
996 return -EINVAL;
997 }
998
dsi_register_isr(struct platform_device * dsidev,omap_dsi_isr_t isr,void * arg,u32 mask)999 static int dsi_register_isr(struct platform_device *dsidev, omap_dsi_isr_t isr,
1000 void *arg, u32 mask)
1001 {
1002 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1003 unsigned long flags;
1004 int r;
1005
1006 spin_lock_irqsave(&dsi->irq_lock, flags);
1007
1008 r = _dsi_register_isr(isr, arg, mask, dsi->isr_tables.isr_table,
1009 ARRAY_SIZE(dsi->isr_tables.isr_table));
1010
1011 if (r == 0)
1012 _omap_dsi_set_irqs(dsidev);
1013
1014 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1015
1016 return r;
1017 }
1018
dsi_unregister_isr(struct platform_device * dsidev,omap_dsi_isr_t isr,void * arg,u32 mask)1019 static int dsi_unregister_isr(struct platform_device *dsidev,
1020 omap_dsi_isr_t isr, void *arg, u32 mask)
1021 {
1022 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1023 unsigned long flags;
1024 int r;
1025
1026 spin_lock_irqsave(&dsi->irq_lock, flags);
1027
1028 r = _dsi_unregister_isr(isr, arg, mask, dsi->isr_tables.isr_table,
1029 ARRAY_SIZE(dsi->isr_tables.isr_table));
1030
1031 if (r == 0)
1032 _omap_dsi_set_irqs(dsidev);
1033
1034 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1035
1036 return r;
1037 }
1038
dsi_register_isr_vc(struct platform_device * dsidev,int channel,omap_dsi_isr_t isr,void * arg,u32 mask)1039 static int dsi_register_isr_vc(struct platform_device *dsidev, int channel,
1040 omap_dsi_isr_t isr, void *arg, u32 mask)
1041 {
1042 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1043 unsigned long flags;
1044 int r;
1045
1046 spin_lock_irqsave(&dsi->irq_lock, flags);
1047
1048 r = _dsi_register_isr(isr, arg, mask,
1049 dsi->isr_tables.isr_table_vc[channel],
1050 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[channel]));
1051
1052 if (r == 0)
1053 _omap_dsi_set_irqs_vc(dsidev, channel);
1054
1055 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1056
1057 return r;
1058 }
1059
dsi_unregister_isr_vc(struct platform_device * dsidev,int channel,omap_dsi_isr_t isr,void * arg,u32 mask)1060 static int dsi_unregister_isr_vc(struct platform_device *dsidev, int channel,
1061 omap_dsi_isr_t isr, void *arg, u32 mask)
1062 {
1063 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1064 unsigned long flags;
1065 int r;
1066
1067 spin_lock_irqsave(&dsi->irq_lock, flags);
1068
1069 r = _dsi_unregister_isr(isr, arg, mask,
1070 dsi->isr_tables.isr_table_vc[channel],
1071 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[channel]));
1072
1073 if (r == 0)
1074 _omap_dsi_set_irqs_vc(dsidev, channel);
1075
1076 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1077
1078 return r;
1079 }
1080
dsi_register_isr_cio(struct platform_device * dsidev,omap_dsi_isr_t isr,void * arg,u32 mask)1081 static int dsi_register_isr_cio(struct platform_device *dsidev,
1082 omap_dsi_isr_t isr, void *arg, u32 mask)
1083 {
1084 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1085 unsigned long flags;
1086 int r;
1087
1088 spin_lock_irqsave(&dsi->irq_lock, flags);
1089
1090 r = _dsi_register_isr(isr, arg, mask, dsi->isr_tables.isr_table_cio,
1091 ARRAY_SIZE(dsi->isr_tables.isr_table_cio));
1092
1093 if (r == 0)
1094 _omap_dsi_set_irqs_cio(dsidev);
1095
1096 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1097
1098 return r;
1099 }
1100
dsi_unregister_isr_cio(struct platform_device * dsidev,omap_dsi_isr_t isr,void * arg,u32 mask)1101 static int dsi_unregister_isr_cio(struct platform_device *dsidev,
1102 omap_dsi_isr_t isr, void *arg, u32 mask)
1103 {
1104 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1105 unsigned long flags;
1106 int r;
1107
1108 spin_lock_irqsave(&dsi->irq_lock, flags);
1109
1110 r = _dsi_unregister_isr(isr, arg, mask, dsi->isr_tables.isr_table_cio,
1111 ARRAY_SIZE(dsi->isr_tables.isr_table_cio));
1112
1113 if (r == 0)
1114 _omap_dsi_set_irqs_cio(dsidev);
1115
1116 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1117
1118 return r;
1119 }
1120
dsi_get_errors(struct platform_device * dsidev)1121 static u32 dsi_get_errors(struct platform_device *dsidev)
1122 {
1123 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1124 unsigned long flags;
1125 u32 e;
1126 spin_lock_irqsave(&dsi->errors_lock, flags);
1127 e = dsi->errors;
1128 dsi->errors = 0;
1129 spin_unlock_irqrestore(&dsi->errors_lock, flags);
1130 return e;
1131 }
1132
dsi_runtime_get(struct platform_device * dsidev)1133 static int dsi_runtime_get(struct platform_device *dsidev)
1134 {
1135 int r;
1136 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1137
1138 DSSDBG("dsi_runtime_get\n");
1139
1140 r = pm_runtime_resume_and_get(&dsi->pdev->dev);
1141 if (WARN_ON(r < 0))
1142 return r;
1143 return 0;
1144 }
1145
dsi_runtime_put(struct platform_device * dsidev)1146 static void dsi_runtime_put(struct platform_device *dsidev)
1147 {
1148 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1149 int r;
1150
1151 DSSDBG("dsi_runtime_put\n");
1152
1153 r = pm_runtime_put_sync(&dsi->pdev->dev);
1154 WARN_ON(r < 0 && r != -ENOSYS);
1155 }
1156
dsi_regulator_init(struct platform_device * dsidev)1157 static int dsi_regulator_init(struct platform_device *dsidev)
1158 {
1159 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1160 struct regulator *vdds_dsi;
1161
1162 if (dsi->vdds_dsi_reg != NULL)
1163 return 0;
1164
1165 vdds_dsi = devm_regulator_get(&dsi->pdev->dev, "vdd");
1166
1167 if (IS_ERR(vdds_dsi)) {
1168 if (PTR_ERR(vdds_dsi) != -EPROBE_DEFER)
1169 DSSERR("can't get DSI VDD regulator\n");
1170 return PTR_ERR(vdds_dsi);
1171 }
1172
1173 dsi->vdds_dsi_reg = vdds_dsi;
1174
1175 return 0;
1176 }
1177
_dsi_print_reset_status(struct platform_device * dsidev)1178 static void _dsi_print_reset_status(struct platform_device *dsidev)
1179 {
1180 int b0, b1, b2;
1181
1182 /* A dummy read using the SCP interface to any DSIPHY register is
1183 * required after DSIPHY reset to complete the reset of the DSI complex
1184 * I/O. */
1185 dsi_read_reg(dsidev, DSI_DSIPHY_CFG5);
1186
1187 if (dss_has_feature(FEAT_DSI_REVERSE_TXCLKESC)) {
1188 b0 = 28;
1189 b1 = 27;
1190 b2 = 26;
1191 } else {
1192 b0 = 24;
1193 b1 = 25;
1194 b2 = 26;
1195 }
1196
1197 #define DSI_FLD_GET(fld, start, end)\
1198 FLD_GET(dsi_read_reg(dsidev, DSI_##fld), start, end)
1199
1200 pr_debug("DSI resets: PLL (%d) CIO (%d) PHY (%x%x%x, %d, %d, %d)\n",
1201 DSI_FLD_GET(PLL_STATUS, 0, 0),
1202 DSI_FLD_GET(COMPLEXIO_CFG1, 29, 29),
1203 DSI_FLD_GET(DSIPHY_CFG5, b0, b0),
1204 DSI_FLD_GET(DSIPHY_CFG5, b1, b1),
1205 DSI_FLD_GET(DSIPHY_CFG5, b2, b2),
1206 DSI_FLD_GET(DSIPHY_CFG5, 29, 29),
1207 DSI_FLD_GET(DSIPHY_CFG5, 30, 30),
1208 DSI_FLD_GET(DSIPHY_CFG5, 31, 31));
1209
1210 #undef DSI_FLD_GET
1211 }
1212
dsi_if_enable(struct platform_device * dsidev,bool enable)1213 static inline int dsi_if_enable(struct platform_device *dsidev, bool enable)
1214 {
1215 DSSDBG("dsi_if_enable(%d)\n", enable);
1216
1217 enable = enable ? 1 : 0;
1218 REG_FLD_MOD(dsidev, DSI_CTRL, enable, 0, 0); /* IF_EN */
1219
1220 if (wait_for_bit_change(dsidev, DSI_CTRL, 0, enable) != enable) {
1221 DSSERR("Failed to set dsi_if_enable to %d\n", enable);
1222 return -EIO;
1223 }
1224
1225 return 0;
1226 }
1227
dsi_get_pll_hsdiv_dispc_rate(struct platform_device * dsidev)1228 static unsigned long dsi_get_pll_hsdiv_dispc_rate(struct platform_device *dsidev)
1229 {
1230 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1231
1232 return dsi->pll.cinfo.clkout[HSDIV_DISPC];
1233 }
1234
dsi_get_pll_hsdiv_dsi_rate(struct platform_device * dsidev)1235 static unsigned long dsi_get_pll_hsdiv_dsi_rate(struct platform_device *dsidev)
1236 {
1237 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1238
1239 return dsi->pll.cinfo.clkout[HSDIV_DSI];
1240 }
1241
dsi_get_txbyteclkhs(struct platform_device * dsidev)1242 static unsigned long dsi_get_txbyteclkhs(struct platform_device *dsidev)
1243 {
1244 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1245
1246 return dsi->pll.cinfo.clkdco / 16;
1247 }
1248
dsi_fclk_rate(struct platform_device * dsidev)1249 static unsigned long dsi_fclk_rate(struct platform_device *dsidev)
1250 {
1251 unsigned long r;
1252 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1253
1254 if (dss_get_dsi_clk_source(dsi->module_id) == OMAP_DSS_CLK_SRC_FCK) {
1255 /* DSI FCLK source is DSS_CLK_FCK */
1256 r = clk_get_rate(dsi->dss_clk);
1257 } else {
1258 /* DSI FCLK source is dsi_pll_hsdiv_dsi_clk */
1259 r = dsi_get_pll_hsdiv_dsi_rate(dsidev);
1260 }
1261
1262 return r;
1263 }
1264
dsi_lp_clock_calc(unsigned long dsi_fclk,unsigned long lp_clk_min,unsigned long lp_clk_max,struct dsi_lp_clock_info * lp_cinfo)1265 static int dsi_lp_clock_calc(unsigned long dsi_fclk,
1266 unsigned long lp_clk_min, unsigned long lp_clk_max,
1267 struct dsi_lp_clock_info *lp_cinfo)
1268 {
1269 unsigned lp_clk_div;
1270 unsigned long lp_clk;
1271
1272 lp_clk_div = DIV_ROUND_UP(dsi_fclk, lp_clk_max * 2);
1273 lp_clk = dsi_fclk / 2 / lp_clk_div;
1274
1275 if (lp_clk < lp_clk_min || lp_clk > lp_clk_max)
1276 return -EINVAL;
1277
1278 lp_cinfo->lp_clk_div = lp_clk_div;
1279 lp_cinfo->lp_clk = lp_clk;
1280
1281 return 0;
1282 }
1283
dsi_set_lp_clk_divisor(struct platform_device * dsidev)1284 static int dsi_set_lp_clk_divisor(struct platform_device *dsidev)
1285 {
1286 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1287 unsigned long dsi_fclk;
1288 unsigned lp_clk_div;
1289 unsigned long lp_clk;
1290 unsigned lpdiv_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_LPDIV);
1291
1292
1293 lp_clk_div = dsi->user_lp_cinfo.lp_clk_div;
1294
1295 if (lp_clk_div == 0 || lp_clk_div > lpdiv_max)
1296 return -EINVAL;
1297
1298 dsi_fclk = dsi_fclk_rate(dsidev);
1299
1300 lp_clk = dsi_fclk / 2 / lp_clk_div;
1301
1302 DSSDBG("LP_CLK_DIV %u, LP_CLK %lu\n", lp_clk_div, lp_clk);
1303 dsi->current_lp_cinfo.lp_clk = lp_clk;
1304 dsi->current_lp_cinfo.lp_clk_div = lp_clk_div;
1305
1306 /* LP_CLK_DIVISOR */
1307 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, lp_clk_div, 12, 0);
1308
1309 /* LP_RX_SYNCHRO_ENABLE */
1310 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, dsi_fclk > 30000000 ? 1 : 0, 21, 21);
1311
1312 return 0;
1313 }
1314
dsi_enable_scp_clk(struct platform_device * dsidev)1315 static void dsi_enable_scp_clk(struct platform_device *dsidev)
1316 {
1317 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1318
1319 if (dsi->scp_clk_refcount++ == 0)
1320 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 1, 14, 14); /* CIO_CLK_ICG */
1321 }
1322
dsi_disable_scp_clk(struct platform_device * dsidev)1323 static void dsi_disable_scp_clk(struct platform_device *dsidev)
1324 {
1325 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1326
1327 WARN_ON(dsi->scp_clk_refcount == 0);
1328 if (--dsi->scp_clk_refcount == 0)
1329 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 0, 14, 14); /* CIO_CLK_ICG */
1330 }
1331
1332 enum dsi_pll_power_state {
1333 DSI_PLL_POWER_OFF = 0x0,
1334 DSI_PLL_POWER_ON_HSCLK = 0x1,
1335 DSI_PLL_POWER_ON_ALL = 0x2,
1336 DSI_PLL_POWER_ON_DIV = 0x3,
1337 };
1338
dsi_pll_power(struct platform_device * dsidev,enum dsi_pll_power_state state)1339 static int dsi_pll_power(struct platform_device *dsidev,
1340 enum dsi_pll_power_state state)
1341 {
1342 int t = 0;
1343
1344 /* DSI-PLL power command 0x3 is not working */
1345 if (dss_has_feature(FEAT_DSI_PLL_PWR_BUG) &&
1346 state == DSI_PLL_POWER_ON_DIV)
1347 state = DSI_PLL_POWER_ON_ALL;
1348
1349 /* PLL_PWR_CMD */
1350 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, state, 31, 30);
1351
1352 /* PLL_PWR_STATUS */
1353 while (FLD_GET(dsi_read_reg(dsidev, DSI_CLK_CTRL), 29, 28) != state) {
1354 if (++t > 1000) {
1355 DSSERR("Failed to set DSI PLL power mode to %d\n",
1356 state);
1357 return -ENODEV;
1358 }
1359 udelay(1);
1360 }
1361
1362 return 0;
1363 }
1364
1365
dsi_pll_calc_dsi_fck(struct dss_pll_clock_info * cinfo)1366 static void dsi_pll_calc_dsi_fck(struct dss_pll_clock_info *cinfo)
1367 {
1368 unsigned long max_dsi_fck;
1369
1370 max_dsi_fck = dss_feat_get_param_max(FEAT_PARAM_DSI_FCK);
1371
1372 cinfo->mX[HSDIV_DSI] = DIV_ROUND_UP(cinfo->clkdco, max_dsi_fck);
1373 cinfo->clkout[HSDIV_DSI] = cinfo->clkdco / cinfo->mX[HSDIV_DSI];
1374 }
1375
dsi_pll_enable(struct dss_pll * pll)1376 static int dsi_pll_enable(struct dss_pll *pll)
1377 {
1378 struct dsi_data *dsi = container_of(pll, struct dsi_data, pll);
1379 struct platform_device *dsidev = dsi->pdev;
1380 int r = 0;
1381
1382 DSSDBG("PLL init\n");
1383
1384 r = dsi_regulator_init(dsidev);
1385 if (r)
1386 return r;
1387
1388 r = dsi_runtime_get(dsidev);
1389 if (r)
1390 return r;
1391
1392 /*
1393 * Note: SCP CLK is not required on OMAP3, but it is required on OMAP4.
1394 */
1395 dsi_enable_scp_clk(dsidev);
1396
1397 if (!dsi->vdds_dsi_enabled) {
1398 r = regulator_enable(dsi->vdds_dsi_reg);
1399 if (r)
1400 goto err0;
1401 dsi->vdds_dsi_enabled = true;
1402 }
1403
1404 /* XXX PLL does not come out of reset without this... */
1405 dispc_pck_free_enable(1);
1406
1407 if (wait_for_bit_change(dsidev, DSI_PLL_STATUS, 0, 1) != 1) {
1408 DSSERR("PLL not coming out of reset.\n");
1409 r = -ENODEV;
1410 dispc_pck_free_enable(0);
1411 goto err1;
1412 }
1413
1414 /* XXX ... but if left on, we get problems when planes do not
1415 * fill the whole display. No idea about this */
1416 dispc_pck_free_enable(0);
1417
1418 r = dsi_pll_power(dsidev, DSI_PLL_POWER_ON_ALL);
1419
1420 if (r)
1421 goto err1;
1422
1423 DSSDBG("PLL init done\n");
1424
1425 return 0;
1426 err1:
1427 if (dsi->vdds_dsi_enabled) {
1428 regulator_disable(dsi->vdds_dsi_reg);
1429 dsi->vdds_dsi_enabled = false;
1430 }
1431 err0:
1432 dsi_disable_scp_clk(dsidev);
1433 dsi_runtime_put(dsidev);
1434 return r;
1435 }
1436
dsi_pll_uninit(struct platform_device * dsidev,bool disconnect_lanes)1437 static void dsi_pll_uninit(struct platform_device *dsidev, bool disconnect_lanes)
1438 {
1439 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1440
1441 dsi_pll_power(dsidev, DSI_PLL_POWER_OFF);
1442 if (disconnect_lanes) {
1443 WARN_ON(!dsi->vdds_dsi_enabled);
1444 regulator_disable(dsi->vdds_dsi_reg);
1445 dsi->vdds_dsi_enabled = false;
1446 }
1447
1448 dsi_disable_scp_clk(dsidev);
1449 dsi_runtime_put(dsidev);
1450
1451 DSSDBG("PLL uninit done\n");
1452 }
1453
dsi_pll_disable(struct dss_pll * pll)1454 static void dsi_pll_disable(struct dss_pll *pll)
1455 {
1456 struct dsi_data *dsi = container_of(pll, struct dsi_data, pll);
1457 struct platform_device *dsidev = dsi->pdev;
1458
1459 dsi_pll_uninit(dsidev, true);
1460 }
1461
dsi_dump_dsidev_clocks(struct platform_device * dsidev,struct seq_file * s)1462 static void dsi_dump_dsidev_clocks(struct platform_device *dsidev,
1463 struct seq_file *s)
1464 {
1465 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1466 struct dss_pll_clock_info *cinfo = &dsi->pll.cinfo;
1467 enum omap_dss_clk_source dispc_clk_src, dsi_clk_src;
1468 int dsi_module = dsi->module_id;
1469 struct dss_pll *pll = &dsi->pll;
1470
1471 dispc_clk_src = dss_get_dispc_clk_source();
1472 dsi_clk_src = dss_get_dsi_clk_source(dsi_module);
1473
1474 if (dsi_runtime_get(dsidev))
1475 return;
1476
1477 seq_printf(s, "- DSI%d PLL -\n", dsi_module + 1);
1478
1479 seq_printf(s, "dsi pll clkin\t%lu\n", clk_get_rate(pll->clkin));
1480
1481 seq_printf(s, "Fint\t\t%-16lun %u\n", cinfo->fint, cinfo->n);
1482
1483 seq_printf(s, "CLKIN4DDR\t%-16lum %u\n",
1484 cinfo->clkdco, cinfo->m);
1485
1486 seq_printf(s, "DSI_PLL_HSDIV_DISPC (%s)\t%-16lum_dispc %u\t(%s)\n",
1487 dss_feat_get_clk_source_name(dsi_module == 0 ?
1488 OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC :
1489 OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC),
1490 cinfo->clkout[HSDIV_DISPC],
1491 cinfo->mX[HSDIV_DISPC],
1492 dispc_clk_src == OMAP_DSS_CLK_SRC_FCK ?
1493 "off" : "on");
1494
1495 seq_printf(s, "DSI_PLL_HSDIV_DSI (%s)\t%-16lum_dsi %u\t(%s)\n",
1496 dss_feat_get_clk_source_name(dsi_module == 0 ?
1497 OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI :
1498 OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI),
1499 cinfo->clkout[HSDIV_DSI],
1500 cinfo->mX[HSDIV_DSI],
1501 dsi_clk_src == OMAP_DSS_CLK_SRC_FCK ?
1502 "off" : "on");
1503
1504 seq_printf(s, "- DSI%d -\n", dsi_module + 1);
1505
1506 seq_printf(s, "dsi fclk source = %s (%s)\n",
1507 dss_get_generic_clk_source_name(dsi_clk_src),
1508 dss_feat_get_clk_source_name(dsi_clk_src));
1509
1510 seq_printf(s, "DSI_FCLK\t%lu\n", dsi_fclk_rate(dsidev));
1511
1512 seq_printf(s, "DDR_CLK\t\t%lu\n",
1513 cinfo->clkdco / 4);
1514
1515 seq_printf(s, "TxByteClkHS\t%lu\n", dsi_get_txbyteclkhs(dsidev));
1516
1517 seq_printf(s, "LP_CLK\t\t%lu\n", dsi->current_lp_cinfo.lp_clk);
1518
1519 dsi_runtime_put(dsidev);
1520 }
1521
dsi_dump_clocks(struct seq_file * s)1522 void dsi_dump_clocks(struct seq_file *s)
1523 {
1524 struct platform_device *dsidev;
1525 int i;
1526
1527 for (i = 0; i < MAX_NUM_DSI; i++) {
1528 dsidev = dsi_get_dsidev_from_id(i);
1529 if (dsidev)
1530 dsi_dump_dsidev_clocks(dsidev, s);
1531 }
1532 }
1533
1534 #ifdef CONFIG_FB_OMAP2_DSS_COLLECT_IRQ_STATS
dsi_dump_dsidev_irqs(struct platform_device * dsidev,struct seq_file * s)1535 static void dsi_dump_dsidev_irqs(struct platform_device *dsidev,
1536 struct seq_file *s)
1537 {
1538 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1539 unsigned long flags;
1540 struct dsi_irq_stats *stats;
1541
1542 stats = kzalloc(sizeof(*stats), GFP_KERNEL);
1543 if (!stats) {
1544 seq_printf(s, "out of memory\n");
1545 return;
1546 }
1547
1548 spin_lock_irqsave(&dsi->irq_stats_lock, flags);
1549
1550 *stats = dsi->irq_stats;
1551 memset(&dsi->irq_stats, 0, sizeof(dsi->irq_stats));
1552 dsi->irq_stats.last_reset = jiffies;
1553
1554 spin_unlock_irqrestore(&dsi->irq_stats_lock, flags);
1555
1556 seq_printf(s, "period %u ms\n",
1557 jiffies_to_msecs(jiffies - stats->last_reset));
1558
1559 seq_printf(s, "irqs %d\n", stats->irq_count);
1560 #define PIS(x) \
1561 seq_printf(s, "%-20s %10d\n", #x, stats->dsi_irqs[ffs(DSI_IRQ_##x)-1])
1562
1563 seq_printf(s, "-- DSI%d interrupts --\n", dsi->module_id + 1);
1564 PIS(VC0);
1565 PIS(VC1);
1566 PIS(VC2);
1567 PIS(VC3);
1568 PIS(WAKEUP);
1569 PIS(RESYNC);
1570 PIS(PLL_LOCK);
1571 PIS(PLL_UNLOCK);
1572 PIS(PLL_RECALL);
1573 PIS(COMPLEXIO_ERR);
1574 PIS(HS_TX_TIMEOUT);
1575 PIS(LP_RX_TIMEOUT);
1576 PIS(TE_TRIGGER);
1577 PIS(ACK_TRIGGER);
1578 PIS(SYNC_LOST);
1579 PIS(LDO_POWER_GOOD);
1580 PIS(TA_TIMEOUT);
1581 #undef PIS
1582
1583 #define PIS(x) \
1584 seq_printf(s, "%-20s %10d %10d %10d %10d\n", #x, \
1585 stats->vc_irqs[0][ffs(DSI_VC_IRQ_##x)-1], \
1586 stats->vc_irqs[1][ffs(DSI_VC_IRQ_##x)-1], \
1587 stats->vc_irqs[2][ffs(DSI_VC_IRQ_##x)-1], \
1588 stats->vc_irqs[3][ffs(DSI_VC_IRQ_##x)-1]);
1589
1590 seq_printf(s, "-- VC interrupts --\n");
1591 PIS(CS);
1592 PIS(ECC_CORR);
1593 PIS(PACKET_SENT);
1594 PIS(FIFO_TX_OVF);
1595 PIS(FIFO_RX_OVF);
1596 PIS(BTA);
1597 PIS(ECC_NO_CORR);
1598 PIS(FIFO_TX_UDF);
1599 PIS(PP_BUSY_CHANGE);
1600 #undef PIS
1601
1602 #define PIS(x) \
1603 seq_printf(s, "%-20s %10d\n", #x, \
1604 stats->cio_irqs[ffs(DSI_CIO_IRQ_##x)-1]);
1605
1606 seq_printf(s, "-- CIO interrupts --\n");
1607 PIS(ERRSYNCESC1);
1608 PIS(ERRSYNCESC2);
1609 PIS(ERRSYNCESC3);
1610 PIS(ERRESC1);
1611 PIS(ERRESC2);
1612 PIS(ERRESC3);
1613 PIS(ERRCONTROL1);
1614 PIS(ERRCONTROL2);
1615 PIS(ERRCONTROL3);
1616 PIS(STATEULPS1);
1617 PIS(STATEULPS2);
1618 PIS(STATEULPS3);
1619 PIS(ERRCONTENTIONLP0_1);
1620 PIS(ERRCONTENTIONLP1_1);
1621 PIS(ERRCONTENTIONLP0_2);
1622 PIS(ERRCONTENTIONLP1_2);
1623 PIS(ERRCONTENTIONLP0_3);
1624 PIS(ERRCONTENTIONLP1_3);
1625 PIS(ULPSACTIVENOT_ALL0);
1626 PIS(ULPSACTIVENOT_ALL1);
1627 #undef PIS
1628
1629 kfree(stats);
1630 }
1631
dsi1_dump_irqs(struct seq_file * s)1632 static void dsi1_dump_irqs(struct seq_file *s)
1633 {
1634 struct platform_device *dsidev = dsi_get_dsidev_from_id(0);
1635
1636 dsi_dump_dsidev_irqs(dsidev, s);
1637 }
1638
dsi2_dump_irqs(struct seq_file * s)1639 static void dsi2_dump_irqs(struct seq_file *s)
1640 {
1641 struct platform_device *dsidev = dsi_get_dsidev_from_id(1);
1642
1643 dsi_dump_dsidev_irqs(dsidev, s);
1644 }
1645 #endif
1646
dsi_dump_dsidev_regs(struct platform_device * dsidev,struct seq_file * s)1647 static void dsi_dump_dsidev_regs(struct platform_device *dsidev,
1648 struct seq_file *s)
1649 {
1650 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dsi_read_reg(dsidev, r))
1651
1652 if (dsi_runtime_get(dsidev))
1653 return;
1654 dsi_enable_scp_clk(dsidev);
1655
1656 DUMPREG(DSI_REVISION);
1657 DUMPREG(DSI_SYSCONFIG);
1658 DUMPREG(DSI_SYSSTATUS);
1659 DUMPREG(DSI_IRQSTATUS);
1660 DUMPREG(DSI_IRQENABLE);
1661 DUMPREG(DSI_CTRL);
1662 DUMPREG(DSI_COMPLEXIO_CFG1);
1663 DUMPREG(DSI_COMPLEXIO_IRQ_STATUS);
1664 DUMPREG(DSI_COMPLEXIO_IRQ_ENABLE);
1665 DUMPREG(DSI_CLK_CTRL);
1666 DUMPREG(DSI_TIMING1);
1667 DUMPREG(DSI_TIMING2);
1668 DUMPREG(DSI_VM_TIMING1);
1669 DUMPREG(DSI_VM_TIMING2);
1670 DUMPREG(DSI_VM_TIMING3);
1671 DUMPREG(DSI_CLK_TIMING);
1672 DUMPREG(DSI_TX_FIFO_VC_SIZE);
1673 DUMPREG(DSI_RX_FIFO_VC_SIZE);
1674 DUMPREG(DSI_COMPLEXIO_CFG2);
1675 DUMPREG(DSI_RX_FIFO_VC_FULLNESS);
1676 DUMPREG(DSI_VM_TIMING4);
1677 DUMPREG(DSI_TX_FIFO_VC_EMPTINESS);
1678 DUMPREG(DSI_VM_TIMING5);
1679 DUMPREG(DSI_VM_TIMING6);
1680 DUMPREG(DSI_VM_TIMING7);
1681 DUMPREG(DSI_STOPCLK_TIMING);
1682
1683 DUMPREG(DSI_VC_CTRL(0));
1684 DUMPREG(DSI_VC_TE(0));
1685 DUMPREG(DSI_VC_LONG_PACKET_HEADER(0));
1686 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(0));
1687 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(0));
1688 DUMPREG(DSI_VC_IRQSTATUS(0));
1689 DUMPREG(DSI_VC_IRQENABLE(0));
1690
1691 DUMPREG(DSI_VC_CTRL(1));
1692 DUMPREG(DSI_VC_TE(1));
1693 DUMPREG(DSI_VC_LONG_PACKET_HEADER(1));
1694 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(1));
1695 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(1));
1696 DUMPREG(DSI_VC_IRQSTATUS(1));
1697 DUMPREG(DSI_VC_IRQENABLE(1));
1698
1699 DUMPREG(DSI_VC_CTRL(2));
1700 DUMPREG(DSI_VC_TE(2));
1701 DUMPREG(DSI_VC_LONG_PACKET_HEADER(2));
1702 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(2));
1703 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(2));
1704 DUMPREG(DSI_VC_IRQSTATUS(2));
1705 DUMPREG(DSI_VC_IRQENABLE(2));
1706
1707 DUMPREG(DSI_VC_CTRL(3));
1708 DUMPREG(DSI_VC_TE(3));
1709 DUMPREG(DSI_VC_LONG_PACKET_HEADER(3));
1710 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(3));
1711 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(3));
1712 DUMPREG(DSI_VC_IRQSTATUS(3));
1713 DUMPREG(DSI_VC_IRQENABLE(3));
1714
1715 DUMPREG(DSI_DSIPHY_CFG0);
1716 DUMPREG(DSI_DSIPHY_CFG1);
1717 DUMPREG(DSI_DSIPHY_CFG2);
1718 DUMPREG(DSI_DSIPHY_CFG5);
1719
1720 DUMPREG(DSI_PLL_CONTROL);
1721 DUMPREG(DSI_PLL_STATUS);
1722 DUMPREG(DSI_PLL_GO);
1723 DUMPREG(DSI_PLL_CONFIGURATION1);
1724 DUMPREG(DSI_PLL_CONFIGURATION2);
1725
1726 dsi_disable_scp_clk(dsidev);
1727 dsi_runtime_put(dsidev);
1728 #undef DUMPREG
1729 }
1730
dsi1_dump_regs(struct seq_file * s)1731 static void dsi1_dump_regs(struct seq_file *s)
1732 {
1733 struct platform_device *dsidev = dsi_get_dsidev_from_id(0);
1734
1735 dsi_dump_dsidev_regs(dsidev, s);
1736 }
1737
dsi2_dump_regs(struct seq_file * s)1738 static void dsi2_dump_regs(struct seq_file *s)
1739 {
1740 struct platform_device *dsidev = dsi_get_dsidev_from_id(1);
1741
1742 dsi_dump_dsidev_regs(dsidev, s);
1743 }
1744
1745 enum dsi_cio_power_state {
1746 DSI_COMPLEXIO_POWER_OFF = 0x0,
1747 DSI_COMPLEXIO_POWER_ON = 0x1,
1748 DSI_COMPLEXIO_POWER_ULPS = 0x2,
1749 };
1750
dsi_cio_power(struct platform_device * dsidev,enum dsi_cio_power_state state)1751 static int dsi_cio_power(struct platform_device *dsidev,
1752 enum dsi_cio_power_state state)
1753 {
1754 int t = 0;
1755
1756 /* PWR_CMD */
1757 REG_FLD_MOD(dsidev, DSI_COMPLEXIO_CFG1, state, 28, 27);
1758
1759 /* PWR_STATUS */
1760 while (FLD_GET(dsi_read_reg(dsidev, DSI_COMPLEXIO_CFG1),
1761 26, 25) != state) {
1762 if (++t > 1000) {
1763 DSSERR("failed to set complexio power state to "
1764 "%d\n", state);
1765 return -ENODEV;
1766 }
1767 udelay(1);
1768 }
1769
1770 return 0;
1771 }
1772
dsi_get_line_buf_size(struct platform_device * dsidev)1773 static unsigned dsi_get_line_buf_size(struct platform_device *dsidev)
1774 {
1775 int val;
1776
1777 /* line buffer on OMAP3 is 1024 x 24bits */
1778 /* XXX: for some reason using full buffer size causes
1779 * considerable TX slowdown with update sizes that fill the
1780 * whole buffer */
1781 if (!dss_has_feature(FEAT_DSI_GNQ))
1782 return 1023 * 3;
1783
1784 val = REG_GET(dsidev, DSI_GNQ, 14, 12); /* VP1_LINE_BUFFER_SIZE */
1785
1786 switch (val) {
1787 case 1:
1788 return 512 * 3; /* 512x24 bits */
1789 case 2:
1790 return 682 * 3; /* 682x24 bits */
1791 case 3:
1792 return 853 * 3; /* 853x24 bits */
1793 case 4:
1794 return 1024 * 3; /* 1024x24 bits */
1795 case 5:
1796 return 1194 * 3; /* 1194x24 bits */
1797 case 6:
1798 return 1365 * 3; /* 1365x24 bits */
1799 case 7:
1800 return 1920 * 3; /* 1920x24 bits */
1801 default:
1802 BUG();
1803 return 0;
1804 }
1805 }
1806
dsi_set_lane_config(struct platform_device * dsidev)1807 static int dsi_set_lane_config(struct platform_device *dsidev)
1808 {
1809 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1810 static const u8 offsets[] = { 0, 4, 8, 12, 16 };
1811 static const enum dsi_lane_function functions[] = {
1812 DSI_LANE_CLK,
1813 DSI_LANE_DATA1,
1814 DSI_LANE_DATA2,
1815 DSI_LANE_DATA3,
1816 DSI_LANE_DATA4,
1817 };
1818 u32 r;
1819 int i;
1820
1821 r = dsi_read_reg(dsidev, DSI_COMPLEXIO_CFG1);
1822
1823 for (i = 0; i < dsi->num_lanes_used; ++i) {
1824 unsigned offset = offsets[i];
1825 unsigned polarity, lane_number;
1826 unsigned t;
1827
1828 for (t = 0; t < dsi->num_lanes_supported; ++t)
1829 if (dsi->lanes[t].function == functions[i])
1830 break;
1831
1832 if (t == dsi->num_lanes_supported)
1833 return -EINVAL;
1834
1835 lane_number = t;
1836 polarity = dsi->lanes[t].polarity;
1837
1838 r = FLD_MOD(r, lane_number + 1, offset + 2, offset);
1839 r = FLD_MOD(r, polarity, offset + 3, offset + 3);
1840 }
1841
1842 /* clear the unused lanes */
1843 for (; i < dsi->num_lanes_supported; ++i) {
1844 unsigned offset = offsets[i];
1845
1846 r = FLD_MOD(r, 0, offset + 2, offset);
1847 r = FLD_MOD(r, 0, offset + 3, offset + 3);
1848 }
1849
1850 dsi_write_reg(dsidev, DSI_COMPLEXIO_CFG1, r);
1851
1852 return 0;
1853 }
1854
ns2ddr(struct platform_device * dsidev,unsigned ns)1855 static inline unsigned ns2ddr(struct platform_device *dsidev, unsigned ns)
1856 {
1857 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1858
1859 /* convert time in ns to ddr ticks, rounding up */
1860 unsigned long ddr_clk = dsi->pll.cinfo.clkdco / 4;
1861 return (ns * (ddr_clk / 1000 / 1000) + 999) / 1000;
1862 }
1863
ddr2ns(struct platform_device * dsidev,unsigned ddr)1864 static inline unsigned ddr2ns(struct platform_device *dsidev, unsigned ddr)
1865 {
1866 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1867
1868 unsigned long ddr_clk = dsi->pll.cinfo.clkdco / 4;
1869 return ddr * 1000 * 1000 / (ddr_clk / 1000);
1870 }
1871
dsi_cio_timings(struct platform_device * dsidev)1872 static void dsi_cio_timings(struct platform_device *dsidev)
1873 {
1874 u32 r;
1875 u32 ths_prepare, ths_prepare_ths_zero, ths_trail, ths_exit;
1876 u32 tlpx_half, tclk_trail, tclk_zero;
1877 u32 tclk_prepare;
1878
1879 /* calculate timings */
1880
1881 /* 1 * DDR_CLK = 2 * UI */
1882
1883 /* min 40ns + 4*UI max 85ns + 6*UI */
1884 ths_prepare = ns2ddr(dsidev, 70) + 2;
1885
1886 /* min 145ns + 10*UI */
1887 ths_prepare_ths_zero = ns2ddr(dsidev, 175) + 2;
1888
1889 /* min max(8*UI, 60ns+4*UI) */
1890 ths_trail = ns2ddr(dsidev, 60) + 5;
1891
1892 /* min 100ns */
1893 ths_exit = ns2ddr(dsidev, 145);
1894
1895 /* tlpx min 50n */
1896 tlpx_half = ns2ddr(dsidev, 25);
1897
1898 /* min 60ns */
1899 tclk_trail = ns2ddr(dsidev, 60) + 2;
1900
1901 /* min 38ns, max 95ns */
1902 tclk_prepare = ns2ddr(dsidev, 65);
1903
1904 /* min tclk-prepare + tclk-zero = 300ns */
1905 tclk_zero = ns2ddr(dsidev, 260);
1906
1907 DSSDBG("ths_prepare %u (%uns), ths_prepare_ths_zero %u (%uns)\n",
1908 ths_prepare, ddr2ns(dsidev, ths_prepare),
1909 ths_prepare_ths_zero, ddr2ns(dsidev, ths_prepare_ths_zero));
1910 DSSDBG("ths_trail %u (%uns), ths_exit %u (%uns)\n",
1911 ths_trail, ddr2ns(dsidev, ths_trail),
1912 ths_exit, ddr2ns(dsidev, ths_exit));
1913
1914 DSSDBG("tlpx_half %u (%uns), tclk_trail %u (%uns), "
1915 "tclk_zero %u (%uns)\n",
1916 tlpx_half, ddr2ns(dsidev, tlpx_half),
1917 tclk_trail, ddr2ns(dsidev, tclk_trail),
1918 tclk_zero, ddr2ns(dsidev, tclk_zero));
1919 DSSDBG("tclk_prepare %u (%uns)\n",
1920 tclk_prepare, ddr2ns(dsidev, tclk_prepare));
1921
1922 /* program timings */
1923
1924 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG0);
1925 r = FLD_MOD(r, ths_prepare, 31, 24);
1926 r = FLD_MOD(r, ths_prepare_ths_zero, 23, 16);
1927 r = FLD_MOD(r, ths_trail, 15, 8);
1928 r = FLD_MOD(r, ths_exit, 7, 0);
1929 dsi_write_reg(dsidev, DSI_DSIPHY_CFG0, r);
1930
1931 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG1);
1932 r = FLD_MOD(r, tlpx_half, 20, 16);
1933 r = FLD_MOD(r, tclk_trail, 15, 8);
1934 r = FLD_MOD(r, tclk_zero, 7, 0);
1935
1936 if (dss_has_feature(FEAT_DSI_PHY_DCC)) {
1937 r = FLD_MOD(r, 0, 21, 21); /* DCCEN = disable */
1938 r = FLD_MOD(r, 1, 22, 22); /* CLKINP_DIVBY2EN = enable */
1939 r = FLD_MOD(r, 1, 23, 23); /* CLKINP_SEL = enable */
1940 }
1941
1942 dsi_write_reg(dsidev, DSI_DSIPHY_CFG1, r);
1943
1944 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG2);
1945 r = FLD_MOD(r, tclk_prepare, 7, 0);
1946 dsi_write_reg(dsidev, DSI_DSIPHY_CFG2, r);
1947 }
1948
1949 /* lane masks have lane 0 at lsb. mask_p for positive lines, n for negative */
dsi_cio_enable_lane_override(struct platform_device * dsidev,unsigned mask_p,unsigned mask_n)1950 static void dsi_cio_enable_lane_override(struct platform_device *dsidev,
1951 unsigned mask_p, unsigned mask_n)
1952 {
1953 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1954 int i;
1955 u32 l;
1956 u8 lptxscp_start = dsi->num_lanes_supported == 3 ? 22 : 26;
1957
1958 l = 0;
1959
1960 for (i = 0; i < dsi->num_lanes_supported; ++i) {
1961 unsigned p = dsi->lanes[i].polarity;
1962
1963 if (mask_p & (1 << i))
1964 l |= 1 << (i * 2 + (p ? 0 : 1));
1965
1966 if (mask_n & (1 << i))
1967 l |= 1 << (i * 2 + (p ? 1 : 0));
1968 }
1969
1970 /*
1971 * Bits in REGLPTXSCPDAT4TO0DXDY:
1972 * 17: DY0 18: DX0
1973 * 19: DY1 20: DX1
1974 * 21: DY2 22: DX2
1975 * 23: DY3 24: DX3
1976 * 25: DY4 26: DX4
1977 */
1978
1979 /* Set the lane override configuration */
1980
1981 /* REGLPTXSCPDAT4TO0DXDY */
1982 REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, l, lptxscp_start, 17);
1983
1984 /* Enable lane override */
1985
1986 /* ENLPTXSCPDAT */
1987 REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, 1, 27, 27);
1988 }
1989
dsi_cio_disable_lane_override(struct platform_device * dsidev)1990 static void dsi_cio_disable_lane_override(struct platform_device *dsidev)
1991 {
1992 /* Disable lane override */
1993 REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, 0, 27, 27); /* ENLPTXSCPDAT */
1994 /* Reset the lane override configuration */
1995 /* REGLPTXSCPDAT4TO0DXDY */
1996 REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, 0, 22, 17);
1997 }
1998
dsi_cio_wait_tx_clk_esc_reset(struct platform_device * dsidev)1999 static int dsi_cio_wait_tx_clk_esc_reset(struct platform_device *dsidev)
2000 {
2001 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2002 int t, i;
2003 bool in_use[DSI_MAX_NR_LANES];
2004 static const u8 offsets_old[] = { 28, 27, 26 };
2005 static const u8 offsets_new[] = { 24, 25, 26, 27, 28 };
2006 const u8 *offsets;
2007
2008 if (dss_has_feature(FEAT_DSI_REVERSE_TXCLKESC))
2009 offsets = offsets_old;
2010 else
2011 offsets = offsets_new;
2012
2013 for (i = 0; i < dsi->num_lanes_supported; ++i)
2014 in_use[i] = dsi->lanes[i].function != DSI_LANE_UNUSED;
2015
2016 t = 100000;
2017 while (true) {
2018 u32 l;
2019 int ok;
2020
2021 l = dsi_read_reg(dsidev, DSI_DSIPHY_CFG5);
2022
2023 ok = 0;
2024 for (i = 0; i < dsi->num_lanes_supported; ++i) {
2025 if (!in_use[i] || (l & (1 << offsets[i])))
2026 ok++;
2027 }
2028
2029 if (ok == dsi->num_lanes_supported)
2030 break;
2031
2032 if (--t == 0) {
2033 for (i = 0; i < dsi->num_lanes_supported; ++i) {
2034 if (!in_use[i] || (l & (1 << offsets[i])))
2035 continue;
2036
2037 DSSERR("CIO TXCLKESC%d domain not coming " \
2038 "out of reset\n", i);
2039 }
2040 return -EIO;
2041 }
2042 }
2043
2044 return 0;
2045 }
2046
2047 /* return bitmask of enabled lanes, lane0 being the lsb */
dsi_get_lane_mask(struct platform_device * dsidev)2048 static unsigned dsi_get_lane_mask(struct platform_device *dsidev)
2049 {
2050 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2051 unsigned mask = 0;
2052 int i;
2053
2054 for (i = 0; i < dsi->num_lanes_supported; ++i) {
2055 if (dsi->lanes[i].function != DSI_LANE_UNUSED)
2056 mask |= 1 << i;
2057 }
2058
2059 return mask;
2060 }
2061
dsi_cio_init(struct platform_device * dsidev)2062 static int dsi_cio_init(struct platform_device *dsidev)
2063 {
2064 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2065 int r;
2066 u32 l;
2067
2068 DSSDBG("DSI CIO init starts");
2069
2070 r = dss_dsi_enable_pads(dsi->module_id, dsi_get_lane_mask(dsidev));
2071 if (r)
2072 return r;
2073
2074 dsi_enable_scp_clk(dsidev);
2075
2076 /* A dummy read using the SCP interface to any DSIPHY register is
2077 * required after DSIPHY reset to complete the reset of the DSI complex
2078 * I/O. */
2079 dsi_read_reg(dsidev, DSI_DSIPHY_CFG5);
2080
2081 if (wait_for_bit_change(dsidev, DSI_DSIPHY_CFG5, 30, 1) != 1) {
2082 DSSERR("CIO SCP Clock domain not coming out of reset.\n");
2083 r = -EIO;
2084 goto err_scp_clk_dom;
2085 }
2086
2087 r = dsi_set_lane_config(dsidev);
2088 if (r)
2089 goto err_scp_clk_dom;
2090
2091 /* set TX STOP MODE timer to maximum for this operation */
2092 l = dsi_read_reg(dsidev, DSI_TIMING1);
2093 l = FLD_MOD(l, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2094 l = FLD_MOD(l, 1, 14, 14); /* STOP_STATE_X16_IO */
2095 l = FLD_MOD(l, 1, 13, 13); /* STOP_STATE_X4_IO */
2096 l = FLD_MOD(l, 0x1fff, 12, 0); /* STOP_STATE_COUNTER_IO */
2097 dsi_write_reg(dsidev, DSI_TIMING1, l);
2098
2099 if (dsi->ulps_enabled) {
2100 unsigned mask_p;
2101 int i;
2102
2103 DSSDBG("manual ulps exit\n");
2104
2105 /* ULPS is exited by Mark-1 state for 1ms, followed by
2106 * stop state. DSS HW cannot do this via the normal
2107 * ULPS exit sequence, as after reset the DSS HW thinks
2108 * that we are not in ULPS mode, and refuses to send the
2109 * sequence. So we need to send the ULPS exit sequence
2110 * manually by setting positive lines high and negative lines
2111 * low for 1ms.
2112 */
2113
2114 mask_p = 0;
2115
2116 for (i = 0; i < dsi->num_lanes_supported; ++i) {
2117 if (dsi->lanes[i].function == DSI_LANE_UNUSED)
2118 continue;
2119 mask_p |= 1 << i;
2120 }
2121
2122 dsi_cio_enable_lane_override(dsidev, mask_p, 0);
2123 }
2124
2125 r = dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_ON);
2126 if (r)
2127 goto err_cio_pwr;
2128
2129 if (wait_for_bit_change(dsidev, DSI_COMPLEXIO_CFG1, 29, 1) != 1) {
2130 DSSERR("CIO PWR clock domain not coming out of reset.\n");
2131 r = -ENODEV;
2132 goto err_cio_pwr_dom;
2133 }
2134
2135 dsi_if_enable(dsidev, true);
2136 dsi_if_enable(dsidev, false);
2137 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 1, 20, 20); /* LP_CLK_ENABLE */
2138
2139 r = dsi_cio_wait_tx_clk_esc_reset(dsidev);
2140 if (r)
2141 goto err_tx_clk_esc_rst;
2142
2143 if (dsi->ulps_enabled) {
2144 /* Keep Mark-1 state for 1ms (as per DSI spec) */
2145 ktime_t wait = ns_to_ktime(1000 * 1000);
2146 set_current_state(TASK_UNINTERRUPTIBLE);
2147 schedule_hrtimeout(&wait, HRTIMER_MODE_REL);
2148
2149 /* Disable the override. The lanes should be set to Mark-11
2150 * state by the HW */
2151 dsi_cio_disable_lane_override(dsidev);
2152 }
2153
2154 /* FORCE_TX_STOP_MODE_IO */
2155 REG_FLD_MOD(dsidev, DSI_TIMING1, 0, 15, 15);
2156
2157 dsi_cio_timings(dsidev);
2158
2159 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
2160 /* DDR_CLK_ALWAYS_ON */
2161 REG_FLD_MOD(dsidev, DSI_CLK_CTRL,
2162 dsi->vm_timings.ddr_clk_always_on, 13, 13);
2163 }
2164
2165 dsi->ulps_enabled = false;
2166
2167 DSSDBG("CIO init done\n");
2168
2169 return 0;
2170
2171 err_tx_clk_esc_rst:
2172 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 0, 20, 20); /* LP_CLK_ENABLE */
2173 err_cio_pwr_dom:
2174 dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_OFF);
2175 err_cio_pwr:
2176 if (dsi->ulps_enabled)
2177 dsi_cio_disable_lane_override(dsidev);
2178 err_scp_clk_dom:
2179 dsi_disable_scp_clk(dsidev);
2180 dss_dsi_disable_pads(dsi->module_id, dsi_get_lane_mask(dsidev));
2181 return r;
2182 }
2183
dsi_cio_uninit(struct platform_device * dsidev)2184 static void dsi_cio_uninit(struct platform_device *dsidev)
2185 {
2186 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2187
2188 /* DDR_CLK_ALWAYS_ON */
2189 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 0, 13, 13);
2190
2191 dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_OFF);
2192 dsi_disable_scp_clk(dsidev);
2193 dss_dsi_disable_pads(dsi->module_id, dsi_get_lane_mask(dsidev));
2194 }
2195
dsi_config_tx_fifo(struct platform_device * dsidev,enum fifo_size size1,enum fifo_size size2,enum fifo_size size3,enum fifo_size size4)2196 static void dsi_config_tx_fifo(struct platform_device *dsidev,
2197 enum fifo_size size1, enum fifo_size size2,
2198 enum fifo_size size3, enum fifo_size size4)
2199 {
2200 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2201 u32 r = 0;
2202 int add = 0;
2203 int i;
2204
2205 dsi->vc[0].tx_fifo_size = size1;
2206 dsi->vc[1].tx_fifo_size = size2;
2207 dsi->vc[2].tx_fifo_size = size3;
2208 dsi->vc[3].tx_fifo_size = size4;
2209
2210 for (i = 0; i < 4; i++) {
2211 u8 v;
2212 int size = dsi->vc[i].tx_fifo_size;
2213
2214 if (add + size > 4) {
2215 DSSERR("Illegal FIFO configuration\n");
2216 BUG();
2217 return;
2218 }
2219
2220 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
2221 r |= v << (8 * i);
2222 /*DSSDBG("TX FIFO vc %d: size %d, add %d\n", i, size, add); */
2223 add += size;
2224 }
2225
2226 dsi_write_reg(dsidev, DSI_TX_FIFO_VC_SIZE, r);
2227 }
2228
dsi_config_rx_fifo(struct platform_device * dsidev,enum fifo_size size1,enum fifo_size size2,enum fifo_size size3,enum fifo_size size4)2229 static void dsi_config_rx_fifo(struct platform_device *dsidev,
2230 enum fifo_size size1, enum fifo_size size2,
2231 enum fifo_size size3, enum fifo_size size4)
2232 {
2233 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2234 u32 r = 0;
2235 int add = 0;
2236 int i;
2237
2238 dsi->vc[0].rx_fifo_size = size1;
2239 dsi->vc[1].rx_fifo_size = size2;
2240 dsi->vc[2].rx_fifo_size = size3;
2241 dsi->vc[3].rx_fifo_size = size4;
2242
2243 for (i = 0; i < 4; i++) {
2244 u8 v;
2245 int size = dsi->vc[i].rx_fifo_size;
2246
2247 if (add + size > 4) {
2248 DSSERR("Illegal FIFO configuration\n");
2249 BUG();
2250 return;
2251 }
2252
2253 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
2254 r |= v << (8 * i);
2255 /*DSSDBG("RX FIFO vc %d: size %d, add %d\n", i, size, add); */
2256 add += size;
2257 }
2258
2259 dsi_write_reg(dsidev, DSI_RX_FIFO_VC_SIZE, r);
2260 }
2261
dsi_force_tx_stop_mode_io(struct platform_device * dsidev)2262 static int dsi_force_tx_stop_mode_io(struct platform_device *dsidev)
2263 {
2264 u32 r;
2265
2266 r = dsi_read_reg(dsidev, DSI_TIMING1);
2267 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2268 dsi_write_reg(dsidev, DSI_TIMING1, r);
2269
2270 if (wait_for_bit_change(dsidev, DSI_TIMING1, 15, 0) != 0) {
2271 DSSERR("TX_STOP bit not going down\n");
2272 return -EIO;
2273 }
2274
2275 return 0;
2276 }
2277
dsi_vc_is_enabled(struct platform_device * dsidev,int channel)2278 static bool dsi_vc_is_enabled(struct platform_device *dsidev, int channel)
2279 {
2280 return REG_GET(dsidev, DSI_VC_CTRL(channel), 0, 0);
2281 }
2282
dsi_packet_sent_handler_vp(void * data,u32 mask)2283 static void dsi_packet_sent_handler_vp(void *data, u32 mask)
2284 {
2285 struct dsi_packet_sent_handler_data *vp_data =
2286 (struct dsi_packet_sent_handler_data *) data;
2287 struct dsi_data *dsi = dsi_get_dsidrv_data(vp_data->dsidev);
2288 const int channel = dsi->update_channel;
2289 u8 bit = dsi->te_enabled ? 30 : 31;
2290
2291 if (REG_GET(vp_data->dsidev, DSI_VC_TE(channel), bit, bit) == 0)
2292 complete(vp_data->completion);
2293 }
2294
dsi_sync_vc_vp(struct platform_device * dsidev,int channel)2295 static int dsi_sync_vc_vp(struct platform_device *dsidev, int channel)
2296 {
2297 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2298 DECLARE_COMPLETION_ONSTACK(completion);
2299 struct dsi_packet_sent_handler_data vp_data = {
2300 .dsidev = dsidev,
2301 .completion = &completion
2302 };
2303 int r = 0;
2304 u8 bit;
2305
2306 bit = dsi->te_enabled ? 30 : 31;
2307
2308 r = dsi_register_isr_vc(dsidev, channel, dsi_packet_sent_handler_vp,
2309 &vp_data, DSI_VC_IRQ_PACKET_SENT);
2310 if (r)
2311 goto err0;
2312
2313 /* Wait for completion only if TE_EN/TE_START is still set */
2314 if (REG_GET(dsidev, DSI_VC_TE(channel), bit, bit)) {
2315 if (wait_for_completion_timeout(&completion,
2316 msecs_to_jiffies(10)) == 0) {
2317 DSSERR("Failed to complete previous frame transfer\n");
2318 r = -EIO;
2319 goto err1;
2320 }
2321 }
2322
2323 dsi_unregister_isr_vc(dsidev, channel, dsi_packet_sent_handler_vp,
2324 &vp_data, DSI_VC_IRQ_PACKET_SENT);
2325
2326 return 0;
2327 err1:
2328 dsi_unregister_isr_vc(dsidev, channel, dsi_packet_sent_handler_vp,
2329 &vp_data, DSI_VC_IRQ_PACKET_SENT);
2330 err0:
2331 return r;
2332 }
2333
dsi_packet_sent_handler_l4(void * data,u32 mask)2334 static void dsi_packet_sent_handler_l4(void *data, u32 mask)
2335 {
2336 struct dsi_packet_sent_handler_data *l4_data =
2337 (struct dsi_packet_sent_handler_data *) data;
2338 struct dsi_data *dsi = dsi_get_dsidrv_data(l4_data->dsidev);
2339 const int channel = dsi->update_channel;
2340
2341 if (REG_GET(l4_data->dsidev, DSI_VC_CTRL(channel), 5, 5) == 0)
2342 complete(l4_data->completion);
2343 }
2344
dsi_sync_vc_l4(struct platform_device * dsidev,int channel)2345 static int dsi_sync_vc_l4(struct platform_device *dsidev, int channel)
2346 {
2347 DECLARE_COMPLETION_ONSTACK(completion);
2348 struct dsi_packet_sent_handler_data l4_data = {
2349 .dsidev = dsidev,
2350 .completion = &completion
2351 };
2352 int r = 0;
2353
2354 r = dsi_register_isr_vc(dsidev, channel, dsi_packet_sent_handler_l4,
2355 &l4_data, DSI_VC_IRQ_PACKET_SENT);
2356 if (r)
2357 goto err0;
2358
2359 /* Wait for completion only if TX_FIFO_NOT_EMPTY is still set */
2360 if (REG_GET(dsidev, DSI_VC_CTRL(channel), 5, 5)) {
2361 if (wait_for_completion_timeout(&completion,
2362 msecs_to_jiffies(10)) == 0) {
2363 DSSERR("Failed to complete previous l4 transfer\n");
2364 r = -EIO;
2365 goto err1;
2366 }
2367 }
2368
2369 dsi_unregister_isr_vc(dsidev, channel, dsi_packet_sent_handler_l4,
2370 &l4_data, DSI_VC_IRQ_PACKET_SENT);
2371
2372 return 0;
2373 err1:
2374 dsi_unregister_isr_vc(dsidev, channel, dsi_packet_sent_handler_l4,
2375 &l4_data, DSI_VC_IRQ_PACKET_SENT);
2376 err0:
2377 return r;
2378 }
2379
dsi_sync_vc(struct platform_device * dsidev,int channel)2380 static int dsi_sync_vc(struct platform_device *dsidev, int channel)
2381 {
2382 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2383
2384 WARN_ON(!dsi_bus_is_locked(dsidev));
2385
2386 if (!dsi_vc_is_enabled(dsidev, channel))
2387 return 0;
2388
2389 switch (dsi->vc[channel].source) {
2390 case DSI_VC_SOURCE_VP:
2391 return dsi_sync_vc_vp(dsidev, channel);
2392 case DSI_VC_SOURCE_L4:
2393 return dsi_sync_vc_l4(dsidev, channel);
2394 default:
2395 BUG();
2396 return -EINVAL;
2397 }
2398 }
2399
dsi_vc_enable(struct platform_device * dsidev,int channel,bool enable)2400 static int dsi_vc_enable(struct platform_device *dsidev, int channel,
2401 bool enable)
2402 {
2403 DSSDBG("dsi_vc_enable channel %d, enable %d\n",
2404 channel, enable);
2405
2406 enable = enable ? 1 : 0;
2407
2408 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), enable, 0, 0);
2409
2410 if (wait_for_bit_change(dsidev, DSI_VC_CTRL(channel),
2411 0, enable) != enable) {
2412 DSSERR("Failed to set dsi_vc_enable to %d\n", enable);
2413 return -EIO;
2414 }
2415
2416 return 0;
2417 }
2418
dsi_vc_initial_config(struct platform_device * dsidev,int channel)2419 static void dsi_vc_initial_config(struct platform_device *dsidev, int channel)
2420 {
2421 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2422 u32 r;
2423
2424 DSSDBG("Initial config of virtual channel %d", channel);
2425
2426 r = dsi_read_reg(dsidev, DSI_VC_CTRL(channel));
2427
2428 if (FLD_GET(r, 15, 15)) /* VC_BUSY */
2429 DSSERR("VC(%d) busy when trying to configure it!\n",
2430 channel);
2431
2432 r = FLD_MOD(r, 0, 1, 1); /* SOURCE, 0 = L4 */
2433 r = FLD_MOD(r, 0, 2, 2); /* BTA_SHORT_EN */
2434 r = FLD_MOD(r, 0, 3, 3); /* BTA_LONG_EN */
2435 r = FLD_MOD(r, 0, 4, 4); /* MODE, 0 = command */
2436 r = FLD_MOD(r, 1, 7, 7); /* CS_TX_EN */
2437 r = FLD_MOD(r, 1, 8, 8); /* ECC_TX_EN */
2438 r = FLD_MOD(r, 0, 9, 9); /* MODE_SPEED, high speed on/off */
2439 if (dss_has_feature(FEAT_DSI_VC_OCP_WIDTH))
2440 r = FLD_MOD(r, 3, 11, 10); /* OCP_WIDTH = 32 bit */
2441
2442 r = FLD_MOD(r, 4, 29, 27); /* DMA_RX_REQ_NB = no dma */
2443 r = FLD_MOD(r, 4, 23, 21); /* DMA_TX_REQ_NB = no dma */
2444
2445 dsi_write_reg(dsidev, DSI_VC_CTRL(channel), r);
2446
2447 dsi->vc[channel].source = DSI_VC_SOURCE_L4;
2448 }
2449
dsi_vc_config_source(struct platform_device * dsidev,int channel,enum dsi_vc_source source)2450 static int dsi_vc_config_source(struct platform_device *dsidev, int channel,
2451 enum dsi_vc_source source)
2452 {
2453 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2454
2455 if (dsi->vc[channel].source == source)
2456 return 0;
2457
2458 DSSDBG("Source config of virtual channel %d", channel);
2459
2460 dsi_sync_vc(dsidev, channel);
2461
2462 dsi_vc_enable(dsidev, channel, 0);
2463
2464 /* VC_BUSY */
2465 if (wait_for_bit_change(dsidev, DSI_VC_CTRL(channel), 15, 0) != 0) {
2466 DSSERR("vc(%d) busy when trying to config for VP\n", channel);
2467 return -EIO;
2468 }
2469
2470 /* SOURCE, 0 = L4, 1 = video port */
2471 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), source, 1, 1);
2472
2473 /* DCS_CMD_ENABLE */
2474 if (dss_has_feature(FEAT_DSI_DCS_CMD_CONFIG_VC)) {
2475 bool enable = source == DSI_VC_SOURCE_VP;
2476 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), enable, 30, 30);
2477 }
2478
2479 dsi_vc_enable(dsidev, channel, 1);
2480
2481 dsi->vc[channel].source = source;
2482
2483 return 0;
2484 }
2485
dsi_vc_enable_hs(struct omap_dss_device * dssdev,int channel,bool enable)2486 static void dsi_vc_enable_hs(struct omap_dss_device *dssdev, int channel,
2487 bool enable)
2488 {
2489 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2490 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2491
2492 DSSDBG("dsi_vc_enable_hs(%d, %d)\n", channel, enable);
2493
2494 WARN_ON(!dsi_bus_is_locked(dsidev));
2495
2496 dsi_vc_enable(dsidev, channel, 0);
2497 dsi_if_enable(dsidev, 0);
2498
2499 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), enable, 9, 9);
2500
2501 dsi_vc_enable(dsidev, channel, 1);
2502 dsi_if_enable(dsidev, 1);
2503
2504 dsi_force_tx_stop_mode_io(dsidev);
2505
2506 /* start the DDR clock by sending a NULL packet */
2507 if (dsi->vm_timings.ddr_clk_always_on && enable)
2508 dsi_vc_send_null(dssdev, channel);
2509 }
2510
dsi_vc_flush_long_data(struct platform_device * dsidev,int channel)2511 static void dsi_vc_flush_long_data(struct platform_device *dsidev, int channel)
2512 {
2513 while (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20)) {
2514 u32 val;
2515 val = dsi_read_reg(dsidev, DSI_VC_SHORT_PACKET_HEADER(channel));
2516 DSSDBG("\t\tb1 %#02x b2 %#02x b3 %#02x b4 %#02x\n",
2517 (val >> 0) & 0xff,
2518 (val >> 8) & 0xff,
2519 (val >> 16) & 0xff,
2520 (val >> 24) & 0xff);
2521 }
2522 }
2523
dsi_show_rx_ack_with_err(u16 err)2524 static void dsi_show_rx_ack_with_err(u16 err)
2525 {
2526 DSSERR("\tACK with ERROR (%#x):\n", err);
2527 if (err & (1 << 0))
2528 DSSERR("\t\tSoT Error\n");
2529 if (err & (1 << 1))
2530 DSSERR("\t\tSoT Sync Error\n");
2531 if (err & (1 << 2))
2532 DSSERR("\t\tEoT Sync Error\n");
2533 if (err & (1 << 3))
2534 DSSERR("\t\tEscape Mode Entry Command Error\n");
2535 if (err & (1 << 4))
2536 DSSERR("\t\tLP Transmit Sync Error\n");
2537 if (err & (1 << 5))
2538 DSSERR("\t\tHS Receive Timeout Error\n");
2539 if (err & (1 << 6))
2540 DSSERR("\t\tFalse Control Error\n");
2541 if (err & (1 << 7))
2542 DSSERR("\t\t(reserved7)\n");
2543 if (err & (1 << 8))
2544 DSSERR("\t\tECC Error, single-bit (corrected)\n");
2545 if (err & (1 << 9))
2546 DSSERR("\t\tECC Error, multi-bit (not corrected)\n");
2547 if (err & (1 << 10))
2548 DSSERR("\t\tChecksum Error\n");
2549 if (err & (1 << 11))
2550 DSSERR("\t\tData type not recognized\n");
2551 if (err & (1 << 12))
2552 DSSERR("\t\tInvalid VC ID\n");
2553 if (err & (1 << 13))
2554 DSSERR("\t\tInvalid Transmission Length\n");
2555 if (err & (1 << 14))
2556 DSSERR("\t\t(reserved14)\n");
2557 if (err & (1 << 15))
2558 DSSERR("\t\tDSI Protocol Violation\n");
2559 }
2560
dsi_vc_flush_receive_data(struct platform_device * dsidev,int channel)2561 static u16 dsi_vc_flush_receive_data(struct platform_device *dsidev,
2562 int channel)
2563 {
2564 /* RX_FIFO_NOT_EMPTY */
2565 while (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20)) {
2566 u32 val;
2567 u8 dt;
2568 val = dsi_read_reg(dsidev, DSI_VC_SHORT_PACKET_HEADER(channel));
2569 DSSERR("\trawval %#08x\n", val);
2570 dt = FLD_GET(val, 5, 0);
2571 if (dt == MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT) {
2572 u16 err = FLD_GET(val, 23, 8);
2573 dsi_show_rx_ack_with_err(err);
2574 } else if (dt == MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE) {
2575 DSSERR("\tDCS short response, 1 byte: %#x\n",
2576 FLD_GET(val, 23, 8));
2577 } else if (dt == MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE) {
2578 DSSERR("\tDCS short response, 2 byte: %#x\n",
2579 FLD_GET(val, 23, 8));
2580 } else if (dt == MIPI_DSI_RX_DCS_LONG_READ_RESPONSE) {
2581 DSSERR("\tDCS long response, len %d\n",
2582 FLD_GET(val, 23, 8));
2583 dsi_vc_flush_long_data(dsidev, channel);
2584 } else {
2585 DSSERR("\tunknown datatype 0x%02x\n", dt);
2586 }
2587 }
2588 return 0;
2589 }
2590
dsi_vc_send_bta(struct platform_device * dsidev,int channel)2591 static int dsi_vc_send_bta(struct platform_device *dsidev, int channel)
2592 {
2593 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2594
2595 if (dsi->debug_write || dsi->debug_read)
2596 DSSDBG("dsi_vc_send_bta %d\n", channel);
2597
2598 WARN_ON(!dsi_bus_is_locked(dsidev));
2599
2600 /* RX_FIFO_NOT_EMPTY */
2601 if (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20)) {
2602 DSSERR("rx fifo not empty when sending BTA, dumping data:\n");
2603 dsi_vc_flush_receive_data(dsidev, channel);
2604 }
2605
2606 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), 1, 6, 6); /* BTA_EN */
2607
2608 /* flush posted write */
2609 dsi_read_reg(dsidev, DSI_VC_CTRL(channel));
2610
2611 return 0;
2612 }
2613
dsi_vc_send_bta_sync(struct omap_dss_device * dssdev,int channel)2614 static int dsi_vc_send_bta_sync(struct omap_dss_device *dssdev, int channel)
2615 {
2616 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2617 DECLARE_COMPLETION_ONSTACK(completion);
2618 int r = 0;
2619 u32 err;
2620
2621 r = dsi_register_isr_vc(dsidev, channel, dsi_completion_handler,
2622 &completion, DSI_VC_IRQ_BTA);
2623 if (r)
2624 goto err0;
2625
2626 r = dsi_register_isr(dsidev, dsi_completion_handler, &completion,
2627 DSI_IRQ_ERROR_MASK);
2628 if (r)
2629 goto err1;
2630
2631 r = dsi_vc_send_bta(dsidev, channel);
2632 if (r)
2633 goto err2;
2634
2635 if (wait_for_completion_timeout(&completion,
2636 msecs_to_jiffies(500)) == 0) {
2637 DSSERR("Failed to receive BTA\n");
2638 r = -EIO;
2639 goto err2;
2640 }
2641
2642 err = dsi_get_errors(dsidev);
2643 if (err) {
2644 DSSERR("Error while sending BTA: %x\n", err);
2645 r = -EIO;
2646 goto err2;
2647 }
2648 err2:
2649 dsi_unregister_isr(dsidev, dsi_completion_handler, &completion,
2650 DSI_IRQ_ERROR_MASK);
2651 err1:
2652 dsi_unregister_isr_vc(dsidev, channel, dsi_completion_handler,
2653 &completion, DSI_VC_IRQ_BTA);
2654 err0:
2655 return r;
2656 }
2657
dsi_vc_write_long_header(struct platform_device * dsidev,int channel,u8 data_type,u16 len,u8 ecc)2658 static inline void dsi_vc_write_long_header(struct platform_device *dsidev,
2659 int channel, u8 data_type, u16 len, u8 ecc)
2660 {
2661 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2662 u32 val;
2663 u8 data_id;
2664
2665 WARN_ON(!dsi_bus_is_locked(dsidev));
2666
2667 data_id = data_type | dsi->vc[channel].vc_id << 6;
2668
2669 val = FLD_VAL(data_id, 7, 0) | FLD_VAL(len, 23, 8) |
2670 FLD_VAL(ecc, 31, 24);
2671
2672 dsi_write_reg(dsidev, DSI_VC_LONG_PACKET_HEADER(channel), val);
2673 }
2674
dsi_vc_write_long_payload(struct platform_device * dsidev,int channel,u8 b1,u8 b2,u8 b3,u8 b4)2675 static inline void dsi_vc_write_long_payload(struct platform_device *dsidev,
2676 int channel, u8 b1, u8 b2, u8 b3, u8 b4)
2677 {
2678 u32 val;
2679
2680 val = b4 << 24 | b3 << 16 | b2 << 8 | b1 << 0;
2681
2682 /* DSSDBG("\twriting %02x, %02x, %02x, %02x (%#010x)\n",
2683 b1, b2, b3, b4, val); */
2684
2685 dsi_write_reg(dsidev, DSI_VC_LONG_PACKET_PAYLOAD(channel), val);
2686 }
2687
dsi_vc_send_long(struct platform_device * dsidev,int channel,u8 data_type,u8 * data,u16 len,u8 ecc)2688 static int dsi_vc_send_long(struct platform_device *dsidev, int channel,
2689 u8 data_type, u8 *data, u16 len, u8 ecc)
2690 {
2691 /*u32 val; */
2692 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2693 int i;
2694 u8 *p;
2695 int r = 0;
2696 u8 b1, b2, b3, b4;
2697
2698 if (dsi->debug_write)
2699 DSSDBG("dsi_vc_send_long, %d bytes\n", len);
2700
2701 /* len + header */
2702 if (dsi->vc[channel].tx_fifo_size * 32 * 4 < len + 4) {
2703 DSSERR("unable to send long packet: packet too long.\n");
2704 return -EINVAL;
2705 }
2706
2707 dsi_vc_config_source(dsidev, channel, DSI_VC_SOURCE_L4);
2708
2709 dsi_vc_write_long_header(dsidev, channel, data_type, len, ecc);
2710
2711 p = data;
2712 for (i = 0; i < len >> 2; i++) {
2713 if (dsi->debug_write)
2714 DSSDBG("\tsending full packet %d\n", i);
2715
2716 b1 = *p++;
2717 b2 = *p++;
2718 b3 = *p++;
2719 b4 = *p++;
2720
2721 dsi_vc_write_long_payload(dsidev, channel, b1, b2, b3, b4);
2722 }
2723
2724 i = len % 4;
2725 if (i) {
2726 b1 = 0; b2 = 0; b3 = 0;
2727
2728 if (dsi->debug_write)
2729 DSSDBG("\tsending remainder bytes %d\n", i);
2730
2731 switch (i) {
2732 case 3:
2733 b1 = *p++;
2734 b2 = *p++;
2735 b3 = *p++;
2736 break;
2737 case 2:
2738 b1 = *p++;
2739 b2 = *p++;
2740 break;
2741 case 1:
2742 b1 = *p++;
2743 break;
2744 }
2745
2746 dsi_vc_write_long_payload(dsidev, channel, b1, b2, b3, 0);
2747 }
2748
2749 return r;
2750 }
2751
dsi_vc_send_short(struct platform_device * dsidev,int channel,u8 data_type,u16 data,u8 ecc)2752 static int dsi_vc_send_short(struct platform_device *dsidev, int channel,
2753 u8 data_type, u16 data, u8 ecc)
2754 {
2755 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2756 u32 r;
2757 u8 data_id;
2758
2759 WARN_ON(!dsi_bus_is_locked(dsidev));
2760
2761 if (dsi->debug_write)
2762 DSSDBG("dsi_vc_send_short(ch%d, dt %#x, b1 %#x, b2 %#x)\n",
2763 channel,
2764 data_type, data & 0xff, (data >> 8) & 0xff);
2765
2766 dsi_vc_config_source(dsidev, channel, DSI_VC_SOURCE_L4);
2767
2768 if (FLD_GET(dsi_read_reg(dsidev, DSI_VC_CTRL(channel)), 16, 16)) {
2769 DSSERR("ERROR FIFO FULL, aborting transfer\n");
2770 return -EINVAL;
2771 }
2772
2773 data_id = data_type | dsi->vc[channel].vc_id << 6;
2774
2775 r = (data_id << 0) | (data << 8) | (ecc << 24);
2776
2777 dsi_write_reg(dsidev, DSI_VC_SHORT_PACKET_HEADER(channel), r);
2778
2779 return 0;
2780 }
2781
dsi_vc_send_null(struct omap_dss_device * dssdev,int channel)2782 static int dsi_vc_send_null(struct omap_dss_device *dssdev, int channel)
2783 {
2784 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2785
2786 return dsi_vc_send_long(dsidev, channel, MIPI_DSI_NULL_PACKET, NULL,
2787 0, 0);
2788 }
2789
dsi_vc_write_nosync_common(struct platform_device * dsidev,int channel,u8 * data,int len,enum dss_dsi_content_type type)2790 static int dsi_vc_write_nosync_common(struct platform_device *dsidev,
2791 int channel, u8 *data, int len, enum dss_dsi_content_type type)
2792 {
2793 int r;
2794
2795 if (len == 0) {
2796 BUG_ON(type == DSS_DSI_CONTENT_DCS);
2797 r = dsi_vc_send_short(dsidev, channel,
2798 MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM, 0, 0);
2799 } else if (len == 1) {
2800 r = dsi_vc_send_short(dsidev, channel,
2801 type == DSS_DSI_CONTENT_GENERIC ?
2802 MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM :
2803 MIPI_DSI_DCS_SHORT_WRITE, data[0], 0);
2804 } else if (len == 2) {
2805 r = dsi_vc_send_short(dsidev, channel,
2806 type == DSS_DSI_CONTENT_GENERIC ?
2807 MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM :
2808 MIPI_DSI_DCS_SHORT_WRITE_PARAM,
2809 data[0] | (data[1] << 8), 0);
2810 } else {
2811 r = dsi_vc_send_long(dsidev, channel,
2812 type == DSS_DSI_CONTENT_GENERIC ?
2813 MIPI_DSI_GENERIC_LONG_WRITE :
2814 MIPI_DSI_DCS_LONG_WRITE, data, len, 0);
2815 }
2816
2817 return r;
2818 }
2819
dsi_vc_dcs_write_nosync(struct omap_dss_device * dssdev,int channel,u8 * data,int len)2820 static int dsi_vc_dcs_write_nosync(struct omap_dss_device *dssdev, int channel,
2821 u8 *data, int len)
2822 {
2823 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2824
2825 return dsi_vc_write_nosync_common(dsidev, channel, data, len,
2826 DSS_DSI_CONTENT_DCS);
2827 }
2828
dsi_vc_generic_write_nosync(struct omap_dss_device * dssdev,int channel,u8 * data,int len)2829 static int dsi_vc_generic_write_nosync(struct omap_dss_device *dssdev, int channel,
2830 u8 *data, int len)
2831 {
2832 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2833
2834 return dsi_vc_write_nosync_common(dsidev, channel, data, len,
2835 DSS_DSI_CONTENT_GENERIC);
2836 }
2837
dsi_vc_write_common(struct omap_dss_device * dssdev,int channel,u8 * data,int len,enum dss_dsi_content_type type)2838 static int dsi_vc_write_common(struct omap_dss_device *dssdev, int channel,
2839 u8 *data, int len, enum dss_dsi_content_type type)
2840 {
2841 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2842 int r;
2843
2844 r = dsi_vc_write_nosync_common(dsidev, channel, data, len, type);
2845 if (r)
2846 goto err;
2847
2848 r = dsi_vc_send_bta_sync(dssdev, channel);
2849 if (r)
2850 goto err;
2851
2852 /* RX_FIFO_NOT_EMPTY */
2853 if (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20)) {
2854 DSSERR("rx fifo not empty after write, dumping data:\n");
2855 dsi_vc_flush_receive_data(dsidev, channel);
2856 r = -EIO;
2857 goto err;
2858 }
2859
2860 return 0;
2861 err:
2862 DSSERR("dsi_vc_write_common(ch %d, cmd 0x%02x, len %d) failed\n",
2863 channel, data[0], len);
2864 return r;
2865 }
2866
dsi_vc_dcs_write(struct omap_dss_device * dssdev,int channel,u8 * data,int len)2867 static int dsi_vc_dcs_write(struct omap_dss_device *dssdev, int channel, u8 *data,
2868 int len)
2869 {
2870 return dsi_vc_write_common(dssdev, channel, data, len,
2871 DSS_DSI_CONTENT_DCS);
2872 }
2873
dsi_vc_generic_write(struct omap_dss_device * dssdev,int channel,u8 * data,int len)2874 static int dsi_vc_generic_write(struct omap_dss_device *dssdev, int channel, u8 *data,
2875 int len)
2876 {
2877 return dsi_vc_write_common(dssdev, channel, data, len,
2878 DSS_DSI_CONTENT_GENERIC);
2879 }
2880
dsi_vc_dcs_send_read_request(struct platform_device * dsidev,int channel,u8 dcs_cmd)2881 static int dsi_vc_dcs_send_read_request(struct platform_device *dsidev,
2882 int channel, u8 dcs_cmd)
2883 {
2884 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2885 int r;
2886
2887 if (dsi->debug_read)
2888 DSSDBG("dsi_vc_dcs_send_read_request(ch%d, dcs_cmd %x)\n",
2889 channel, dcs_cmd);
2890
2891 r = dsi_vc_send_short(dsidev, channel, MIPI_DSI_DCS_READ, dcs_cmd, 0);
2892 if (r) {
2893 DSSERR("dsi_vc_dcs_send_read_request(ch %d, cmd 0x%02x)"
2894 " failed\n", channel, dcs_cmd);
2895 return r;
2896 }
2897
2898 return 0;
2899 }
2900
dsi_vc_generic_send_read_request(struct platform_device * dsidev,int channel,u8 * reqdata,int reqlen)2901 static int dsi_vc_generic_send_read_request(struct platform_device *dsidev,
2902 int channel, u8 *reqdata, int reqlen)
2903 {
2904 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2905 u16 data;
2906 u8 data_type;
2907 int r;
2908
2909 if (dsi->debug_read)
2910 DSSDBG("dsi_vc_generic_send_read_request(ch %d, reqlen %d)\n",
2911 channel, reqlen);
2912
2913 if (reqlen == 0) {
2914 data_type = MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM;
2915 data = 0;
2916 } else if (reqlen == 1) {
2917 data_type = MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM;
2918 data = reqdata[0];
2919 } else if (reqlen == 2) {
2920 data_type = MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM;
2921 data = reqdata[0] | (reqdata[1] << 8);
2922 } else {
2923 BUG();
2924 return -EINVAL;
2925 }
2926
2927 r = dsi_vc_send_short(dsidev, channel, data_type, data, 0);
2928 if (r) {
2929 DSSERR("dsi_vc_generic_send_read_request(ch %d, reqlen %d)"
2930 " failed\n", channel, reqlen);
2931 return r;
2932 }
2933
2934 return 0;
2935 }
2936
dsi_vc_read_rx_fifo(struct platform_device * dsidev,int channel,u8 * buf,int buflen,enum dss_dsi_content_type type)2937 static int dsi_vc_read_rx_fifo(struct platform_device *dsidev, int channel,
2938 u8 *buf, int buflen, enum dss_dsi_content_type type)
2939 {
2940 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2941 u32 val;
2942 u8 dt;
2943 int r;
2944
2945 /* RX_FIFO_NOT_EMPTY */
2946 if (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20) == 0) {
2947 DSSERR("RX fifo empty when trying to read.\n");
2948 r = -EIO;
2949 goto err;
2950 }
2951
2952 val = dsi_read_reg(dsidev, DSI_VC_SHORT_PACKET_HEADER(channel));
2953 if (dsi->debug_read)
2954 DSSDBG("\theader: %08x\n", val);
2955 dt = FLD_GET(val, 5, 0);
2956 if (dt == MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT) {
2957 u16 err = FLD_GET(val, 23, 8);
2958 dsi_show_rx_ack_with_err(err);
2959 r = -EIO;
2960 goto err;
2961
2962 } else if (dt == (type == DSS_DSI_CONTENT_GENERIC ?
2963 MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE :
2964 MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE)) {
2965 u8 data = FLD_GET(val, 15, 8);
2966 if (dsi->debug_read)
2967 DSSDBG("\t%s short response, 1 byte: %02x\n",
2968 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" :
2969 "DCS", data);
2970
2971 if (buflen < 1) {
2972 r = -EIO;
2973 goto err;
2974 }
2975
2976 buf[0] = data;
2977
2978 return 1;
2979 } else if (dt == (type == DSS_DSI_CONTENT_GENERIC ?
2980 MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE :
2981 MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE)) {
2982 u16 data = FLD_GET(val, 23, 8);
2983 if (dsi->debug_read)
2984 DSSDBG("\t%s short response, 2 byte: %04x\n",
2985 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" :
2986 "DCS", data);
2987
2988 if (buflen < 2) {
2989 r = -EIO;
2990 goto err;
2991 }
2992
2993 buf[0] = data & 0xff;
2994 buf[1] = (data >> 8) & 0xff;
2995
2996 return 2;
2997 } else if (dt == (type == DSS_DSI_CONTENT_GENERIC ?
2998 MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE :
2999 MIPI_DSI_RX_DCS_LONG_READ_RESPONSE)) {
3000 int w;
3001 int len = FLD_GET(val, 23, 8);
3002 if (dsi->debug_read)
3003 DSSDBG("\t%s long response, len %d\n",
3004 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" :
3005 "DCS", len);
3006
3007 if (len > buflen) {
3008 r = -EIO;
3009 goto err;
3010 }
3011
3012 /* two byte checksum ends the packet, not included in len */
3013 for (w = 0; w < len + 2;) {
3014 int b;
3015 val = dsi_read_reg(dsidev,
3016 DSI_VC_SHORT_PACKET_HEADER(channel));
3017 if (dsi->debug_read)
3018 DSSDBG("\t\t%02x %02x %02x %02x\n",
3019 (val >> 0) & 0xff,
3020 (val >> 8) & 0xff,
3021 (val >> 16) & 0xff,
3022 (val >> 24) & 0xff);
3023
3024 for (b = 0; b < 4; ++b) {
3025 if (w < len)
3026 buf[w] = (val >> (b * 8)) & 0xff;
3027 /* we discard the 2 byte checksum */
3028 ++w;
3029 }
3030 }
3031
3032 return len;
3033 } else {
3034 DSSERR("\tunknown datatype 0x%02x\n", dt);
3035 r = -EIO;
3036 goto err;
3037 }
3038
3039 err:
3040 DSSERR("dsi_vc_read_rx_fifo(ch %d type %s) failed\n", channel,
3041 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" : "DCS");
3042
3043 return r;
3044 }
3045
dsi_vc_dcs_read(struct omap_dss_device * dssdev,int channel,u8 dcs_cmd,u8 * buf,int buflen)3046 static int dsi_vc_dcs_read(struct omap_dss_device *dssdev, int channel, u8 dcs_cmd,
3047 u8 *buf, int buflen)
3048 {
3049 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3050 int r;
3051
3052 r = dsi_vc_dcs_send_read_request(dsidev, channel, dcs_cmd);
3053 if (r)
3054 goto err;
3055
3056 r = dsi_vc_send_bta_sync(dssdev, channel);
3057 if (r)
3058 goto err;
3059
3060 r = dsi_vc_read_rx_fifo(dsidev, channel, buf, buflen,
3061 DSS_DSI_CONTENT_DCS);
3062 if (r < 0)
3063 goto err;
3064
3065 if (r != buflen) {
3066 r = -EIO;
3067 goto err;
3068 }
3069
3070 return 0;
3071 err:
3072 DSSERR("dsi_vc_dcs_read(ch %d, cmd 0x%02x) failed\n", channel, dcs_cmd);
3073 return r;
3074 }
3075
dsi_vc_generic_read(struct omap_dss_device * dssdev,int channel,u8 * reqdata,int reqlen,u8 * buf,int buflen)3076 static int dsi_vc_generic_read(struct omap_dss_device *dssdev, int channel,
3077 u8 *reqdata, int reqlen, u8 *buf, int buflen)
3078 {
3079 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3080 int r;
3081
3082 r = dsi_vc_generic_send_read_request(dsidev, channel, reqdata, reqlen);
3083 if (r)
3084 return r;
3085
3086 r = dsi_vc_send_bta_sync(dssdev, channel);
3087 if (r)
3088 return r;
3089
3090 r = dsi_vc_read_rx_fifo(dsidev, channel, buf, buflen,
3091 DSS_DSI_CONTENT_GENERIC);
3092 if (r < 0)
3093 return r;
3094
3095 if (r != buflen) {
3096 r = -EIO;
3097 return r;
3098 }
3099
3100 return 0;
3101 }
3102
dsi_vc_set_max_rx_packet_size(struct omap_dss_device * dssdev,int channel,u16 len)3103 static int dsi_vc_set_max_rx_packet_size(struct omap_dss_device *dssdev, int channel,
3104 u16 len)
3105 {
3106 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3107
3108 return dsi_vc_send_short(dsidev, channel,
3109 MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE, len, 0);
3110 }
3111
dsi_enter_ulps(struct platform_device * dsidev)3112 static int dsi_enter_ulps(struct platform_device *dsidev)
3113 {
3114 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3115 DECLARE_COMPLETION_ONSTACK(completion);
3116 int r, i;
3117 unsigned mask;
3118
3119 DSSDBG("Entering ULPS");
3120
3121 WARN_ON(!dsi_bus_is_locked(dsidev));
3122
3123 WARN_ON(dsi->ulps_enabled);
3124
3125 if (dsi->ulps_enabled)
3126 return 0;
3127
3128 /* DDR_CLK_ALWAYS_ON */
3129 if (REG_GET(dsidev, DSI_CLK_CTRL, 13, 13)) {
3130 dsi_if_enable(dsidev, 0);
3131 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 0, 13, 13);
3132 dsi_if_enable(dsidev, 1);
3133 }
3134
3135 dsi_sync_vc(dsidev, 0);
3136 dsi_sync_vc(dsidev, 1);
3137 dsi_sync_vc(dsidev, 2);
3138 dsi_sync_vc(dsidev, 3);
3139
3140 dsi_force_tx_stop_mode_io(dsidev);
3141
3142 dsi_vc_enable(dsidev, 0, false);
3143 dsi_vc_enable(dsidev, 1, false);
3144 dsi_vc_enable(dsidev, 2, false);
3145 dsi_vc_enable(dsidev, 3, false);
3146
3147 if (REG_GET(dsidev, DSI_COMPLEXIO_CFG2, 16, 16)) { /* HS_BUSY */
3148 DSSERR("HS busy when enabling ULPS\n");
3149 return -EIO;
3150 }
3151
3152 if (REG_GET(dsidev, DSI_COMPLEXIO_CFG2, 17, 17)) { /* LP_BUSY */
3153 DSSERR("LP busy when enabling ULPS\n");
3154 return -EIO;
3155 }
3156
3157 r = dsi_register_isr_cio(dsidev, dsi_completion_handler, &completion,
3158 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
3159 if (r)
3160 return r;
3161
3162 mask = 0;
3163
3164 for (i = 0; i < dsi->num_lanes_supported; ++i) {
3165 if (dsi->lanes[i].function == DSI_LANE_UNUSED)
3166 continue;
3167 mask |= 1 << i;
3168 }
3169 /* Assert TxRequestEsc for data lanes and TxUlpsClk for clk lane */
3170 /* LANEx_ULPS_SIG2 */
3171 REG_FLD_MOD(dsidev, DSI_COMPLEXIO_CFG2, mask, 9, 5);
3172
3173 /* flush posted write and wait for SCP interface to finish the write */
3174 dsi_read_reg(dsidev, DSI_COMPLEXIO_CFG2);
3175
3176 if (wait_for_completion_timeout(&completion,
3177 msecs_to_jiffies(1000)) == 0) {
3178 DSSERR("ULPS enable timeout\n");
3179 r = -EIO;
3180 goto err;
3181 }
3182
3183 dsi_unregister_isr_cio(dsidev, dsi_completion_handler, &completion,
3184 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
3185
3186 /* Reset LANEx_ULPS_SIG2 */
3187 REG_FLD_MOD(dsidev, DSI_COMPLEXIO_CFG2, 0, 9, 5);
3188
3189 /* flush posted write and wait for SCP interface to finish the write */
3190 dsi_read_reg(dsidev, DSI_COMPLEXIO_CFG2);
3191
3192 dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_ULPS);
3193
3194 dsi_if_enable(dsidev, false);
3195
3196 dsi->ulps_enabled = true;
3197
3198 return 0;
3199
3200 err:
3201 dsi_unregister_isr_cio(dsidev, dsi_completion_handler, &completion,
3202 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
3203 return r;
3204 }
3205
dsi_set_lp_rx_timeout(struct platform_device * dsidev,unsigned ticks,bool x4,bool x16)3206 static void dsi_set_lp_rx_timeout(struct platform_device *dsidev,
3207 unsigned ticks, bool x4, bool x16)
3208 {
3209 unsigned long fck;
3210 unsigned long total_ticks;
3211 u32 r;
3212
3213 BUG_ON(ticks > 0x1fff);
3214
3215 /* ticks in DSI_FCK */
3216 fck = dsi_fclk_rate(dsidev);
3217
3218 r = dsi_read_reg(dsidev, DSI_TIMING2);
3219 r = FLD_MOD(r, 1, 15, 15); /* LP_RX_TO */
3220 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* LP_RX_TO_X16 */
3221 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* LP_RX_TO_X4 */
3222 r = FLD_MOD(r, ticks, 12, 0); /* LP_RX_COUNTER */
3223 dsi_write_reg(dsidev, DSI_TIMING2, r);
3224
3225 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
3226
3227 DSSDBG("LP_RX_TO %lu ticks (%#x%s%s) = %lu ns\n",
3228 total_ticks,
3229 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
3230 (total_ticks * 1000) / (fck / 1000 / 1000));
3231 }
3232
dsi_set_ta_timeout(struct platform_device * dsidev,unsigned ticks,bool x8,bool x16)3233 static void dsi_set_ta_timeout(struct platform_device *dsidev, unsigned ticks,
3234 bool x8, bool x16)
3235 {
3236 unsigned long fck;
3237 unsigned long total_ticks;
3238 u32 r;
3239
3240 BUG_ON(ticks > 0x1fff);
3241
3242 /* ticks in DSI_FCK */
3243 fck = dsi_fclk_rate(dsidev);
3244
3245 r = dsi_read_reg(dsidev, DSI_TIMING1);
3246 r = FLD_MOD(r, 1, 31, 31); /* TA_TO */
3247 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* TA_TO_X16 */
3248 r = FLD_MOD(r, x8 ? 1 : 0, 29, 29); /* TA_TO_X8 */
3249 r = FLD_MOD(r, ticks, 28, 16); /* TA_TO_COUNTER */
3250 dsi_write_reg(dsidev, DSI_TIMING1, r);
3251
3252 total_ticks = ticks * (x16 ? 16 : 1) * (x8 ? 8 : 1);
3253
3254 DSSDBG("TA_TO %lu ticks (%#x%s%s) = %lu ns\n",
3255 total_ticks,
3256 ticks, x8 ? " x8" : "", x16 ? " x16" : "",
3257 (total_ticks * 1000) / (fck / 1000 / 1000));
3258 }
3259
dsi_set_stop_state_counter(struct platform_device * dsidev,unsigned ticks,bool x4,bool x16)3260 static void dsi_set_stop_state_counter(struct platform_device *dsidev,
3261 unsigned ticks, bool x4, bool x16)
3262 {
3263 unsigned long fck;
3264 unsigned long total_ticks;
3265 u32 r;
3266
3267 BUG_ON(ticks > 0x1fff);
3268
3269 /* ticks in DSI_FCK */
3270 fck = dsi_fclk_rate(dsidev);
3271
3272 r = dsi_read_reg(dsidev, DSI_TIMING1);
3273 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
3274 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* STOP_STATE_X16_IO */
3275 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* STOP_STATE_X4_IO */
3276 r = FLD_MOD(r, ticks, 12, 0); /* STOP_STATE_COUNTER_IO */
3277 dsi_write_reg(dsidev, DSI_TIMING1, r);
3278
3279 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
3280
3281 DSSDBG("STOP_STATE_COUNTER %lu ticks (%#x%s%s) = %lu ns\n",
3282 total_ticks,
3283 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
3284 (total_ticks * 1000) / (fck / 1000 / 1000));
3285 }
3286
dsi_set_hs_tx_timeout(struct platform_device * dsidev,unsigned ticks,bool x4,bool x16)3287 static void dsi_set_hs_tx_timeout(struct platform_device *dsidev,
3288 unsigned ticks, bool x4, bool x16)
3289 {
3290 unsigned long fck;
3291 unsigned long total_ticks;
3292 u32 r;
3293
3294 BUG_ON(ticks > 0x1fff);
3295
3296 /* ticks in TxByteClkHS */
3297 fck = dsi_get_txbyteclkhs(dsidev);
3298
3299 r = dsi_read_reg(dsidev, DSI_TIMING2);
3300 r = FLD_MOD(r, 1, 31, 31); /* HS_TX_TO */
3301 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* HS_TX_TO_X16 */
3302 r = FLD_MOD(r, x4 ? 1 : 0, 29, 29); /* HS_TX_TO_X8 (4 really) */
3303 r = FLD_MOD(r, ticks, 28, 16); /* HS_TX_TO_COUNTER */
3304 dsi_write_reg(dsidev, DSI_TIMING2, r);
3305
3306 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
3307
3308 DSSDBG("HS_TX_TO %lu ticks (%#x%s%s) = %lu ns\n",
3309 total_ticks,
3310 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
3311 (total_ticks * 1000) / (fck / 1000 / 1000));
3312 }
3313
dsi_config_vp_num_line_buffers(struct platform_device * dsidev)3314 static void dsi_config_vp_num_line_buffers(struct platform_device *dsidev)
3315 {
3316 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3317 int num_line_buffers;
3318
3319 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3320 int bpp = dsi_get_pixel_size(dsi->pix_fmt);
3321 struct omap_video_timings *timings = &dsi->timings;
3322 /*
3323 * Don't use line buffers if width is greater than the video
3324 * port's line buffer size
3325 */
3326 if (dsi->line_buffer_size <= timings->x_res * bpp / 8)
3327 num_line_buffers = 0;
3328 else
3329 num_line_buffers = 2;
3330 } else {
3331 /* Use maximum number of line buffers in command mode */
3332 num_line_buffers = 2;
3333 }
3334
3335 /* LINE_BUFFER */
3336 REG_FLD_MOD(dsidev, DSI_CTRL, num_line_buffers, 13, 12);
3337 }
3338
dsi_config_vp_sync_events(struct platform_device * dsidev)3339 static void dsi_config_vp_sync_events(struct platform_device *dsidev)
3340 {
3341 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3342 bool sync_end;
3343 u32 r;
3344
3345 if (dsi->vm_timings.trans_mode == OMAP_DSS_DSI_PULSE_MODE)
3346 sync_end = true;
3347 else
3348 sync_end = false;
3349
3350 r = dsi_read_reg(dsidev, DSI_CTRL);
3351 r = FLD_MOD(r, 1, 9, 9); /* VP_DE_POL */
3352 r = FLD_MOD(r, 1, 10, 10); /* VP_HSYNC_POL */
3353 r = FLD_MOD(r, 1, 11, 11); /* VP_VSYNC_POL */
3354 r = FLD_MOD(r, 1, 15, 15); /* VP_VSYNC_START */
3355 r = FLD_MOD(r, sync_end, 16, 16); /* VP_VSYNC_END */
3356 r = FLD_MOD(r, 1, 17, 17); /* VP_HSYNC_START */
3357 r = FLD_MOD(r, sync_end, 18, 18); /* VP_HSYNC_END */
3358 dsi_write_reg(dsidev, DSI_CTRL, r);
3359 }
3360
dsi_config_blanking_modes(struct platform_device * dsidev)3361 static void dsi_config_blanking_modes(struct platform_device *dsidev)
3362 {
3363 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3364 int blanking_mode = dsi->vm_timings.blanking_mode;
3365 int hfp_blanking_mode = dsi->vm_timings.hfp_blanking_mode;
3366 int hbp_blanking_mode = dsi->vm_timings.hbp_blanking_mode;
3367 int hsa_blanking_mode = dsi->vm_timings.hsa_blanking_mode;
3368 u32 r;
3369
3370 /*
3371 * 0 = TX FIFO packets sent or LPS in corresponding blanking periods
3372 * 1 = Long blanking packets are sent in corresponding blanking periods
3373 */
3374 r = dsi_read_reg(dsidev, DSI_CTRL);
3375 r = FLD_MOD(r, blanking_mode, 20, 20); /* BLANKING_MODE */
3376 r = FLD_MOD(r, hfp_blanking_mode, 21, 21); /* HFP_BLANKING */
3377 r = FLD_MOD(r, hbp_blanking_mode, 22, 22); /* HBP_BLANKING */
3378 r = FLD_MOD(r, hsa_blanking_mode, 23, 23); /* HSA_BLANKING */
3379 dsi_write_reg(dsidev, DSI_CTRL, r);
3380 }
3381
3382 /*
3383 * According to section 'HS Command Mode Interleaving' in OMAP TRM, Scenario 3
3384 * results in maximum transition time for data and clock lanes to enter and
3385 * exit HS mode. Hence, this is the scenario where the least amount of command
3386 * mode data can be interleaved. We program the minimum amount of TXBYTECLKHS
3387 * clock cycles that can be used to interleave command mode data in HS so that
3388 * all scenarios are satisfied.
3389 */
dsi_compute_interleave_hs(int blank,bool ddr_alwon,int enter_hs,int exit_hs,int exiths_clk,int ddr_pre,int ddr_post)3390 static int dsi_compute_interleave_hs(int blank, bool ddr_alwon, int enter_hs,
3391 int exit_hs, int exiths_clk, int ddr_pre, int ddr_post)
3392 {
3393 int transition;
3394
3395 /*
3396 * If DDR_CLK_ALWAYS_ON is set, we need to consider HS mode transition
3397 * time of data lanes only, if it isn't set, we need to consider HS
3398 * transition time of both data and clock lanes. HS transition time
3399 * of Scenario 3 is considered.
3400 */
3401 if (ddr_alwon) {
3402 transition = enter_hs + exit_hs + max(enter_hs, 2) + 1;
3403 } else {
3404 int trans1, trans2;
3405 trans1 = ddr_pre + enter_hs + exit_hs + max(enter_hs, 2) + 1;
3406 trans2 = ddr_pre + enter_hs + exiths_clk + ddr_post + ddr_pre +
3407 enter_hs + 1;
3408 transition = max(trans1, trans2);
3409 }
3410
3411 return blank > transition ? blank - transition : 0;
3412 }
3413
3414 /*
3415 * According to section 'LP Command Mode Interleaving' in OMAP TRM, Scenario 1
3416 * results in maximum transition time for data lanes to enter and exit LP mode.
3417 * Hence, this is the scenario where the least amount of command mode data can
3418 * be interleaved. We program the minimum amount of bytes that can be
3419 * interleaved in LP so that all scenarios are satisfied.
3420 */
dsi_compute_interleave_lp(int blank,int enter_hs,int exit_hs,int lp_clk_div,int tdsi_fclk)3421 static int dsi_compute_interleave_lp(int blank, int enter_hs, int exit_hs,
3422 int lp_clk_div, int tdsi_fclk)
3423 {
3424 int trans_lp; /* time required for a LP transition, in TXBYTECLKHS */
3425 int tlp_avail; /* time left for interleaving commands, in CLKIN4DDR */
3426 int ttxclkesc; /* period of LP transmit escape clock, in CLKIN4DDR */
3427 int thsbyte_clk = 16; /* Period of TXBYTECLKHS clock, in CLKIN4DDR */
3428 int lp_inter; /* cmd mode data that can be interleaved, in bytes */
3429
3430 /* maximum LP transition time according to Scenario 1 */
3431 trans_lp = exit_hs + max(enter_hs, 2) + 1;
3432
3433 /* CLKIN4DDR = 16 * TXBYTECLKHS */
3434 tlp_avail = thsbyte_clk * (blank - trans_lp);
3435
3436 ttxclkesc = tdsi_fclk * lp_clk_div;
3437
3438 lp_inter = ((tlp_avail - 8 * thsbyte_clk - 5 * tdsi_fclk) / ttxclkesc -
3439 26) / 16;
3440
3441 return max(lp_inter, 0);
3442 }
3443
dsi_config_cmd_mode_interleaving(struct platform_device * dsidev)3444 static void dsi_config_cmd_mode_interleaving(struct platform_device *dsidev)
3445 {
3446 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3447 int blanking_mode;
3448 int hfp_blanking_mode, hbp_blanking_mode, hsa_blanking_mode;
3449 int hsa, hfp, hbp, width_bytes, bllp, lp_clk_div;
3450 int ddr_clk_pre, ddr_clk_post, enter_hs_mode_lat, exit_hs_mode_lat;
3451 int tclk_trail, ths_exit, exiths_clk;
3452 bool ddr_alwon;
3453 struct omap_video_timings *timings = &dsi->timings;
3454 int bpp = dsi_get_pixel_size(dsi->pix_fmt);
3455 int ndl = dsi->num_lanes_used - 1;
3456 int dsi_fclk_hsdiv = dsi->user_dsi_cinfo.mX[HSDIV_DSI] + 1;
3457 int hsa_interleave_hs = 0, hsa_interleave_lp = 0;
3458 int hfp_interleave_hs = 0, hfp_interleave_lp = 0;
3459 int hbp_interleave_hs = 0, hbp_interleave_lp = 0;
3460 int bl_interleave_hs = 0, bl_interleave_lp = 0;
3461 u32 r;
3462
3463 r = dsi_read_reg(dsidev, DSI_CTRL);
3464 blanking_mode = FLD_GET(r, 20, 20);
3465 hfp_blanking_mode = FLD_GET(r, 21, 21);
3466 hbp_blanking_mode = FLD_GET(r, 22, 22);
3467 hsa_blanking_mode = FLD_GET(r, 23, 23);
3468
3469 r = dsi_read_reg(dsidev, DSI_VM_TIMING1);
3470 hbp = FLD_GET(r, 11, 0);
3471 hfp = FLD_GET(r, 23, 12);
3472 hsa = FLD_GET(r, 31, 24);
3473
3474 r = dsi_read_reg(dsidev, DSI_CLK_TIMING);
3475 ddr_clk_post = FLD_GET(r, 7, 0);
3476 ddr_clk_pre = FLD_GET(r, 15, 8);
3477
3478 r = dsi_read_reg(dsidev, DSI_VM_TIMING7);
3479 exit_hs_mode_lat = FLD_GET(r, 15, 0);
3480 enter_hs_mode_lat = FLD_GET(r, 31, 16);
3481
3482 r = dsi_read_reg(dsidev, DSI_CLK_CTRL);
3483 lp_clk_div = FLD_GET(r, 12, 0);
3484 ddr_alwon = FLD_GET(r, 13, 13);
3485
3486 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG0);
3487 ths_exit = FLD_GET(r, 7, 0);
3488
3489 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG1);
3490 tclk_trail = FLD_GET(r, 15, 8);
3491
3492 exiths_clk = ths_exit + tclk_trail;
3493
3494 width_bytes = DIV_ROUND_UP(timings->x_res * bpp, 8);
3495 bllp = hbp + hfp + hsa + DIV_ROUND_UP(width_bytes + 6, ndl);
3496
3497 if (!hsa_blanking_mode) {
3498 hsa_interleave_hs = dsi_compute_interleave_hs(hsa, ddr_alwon,
3499 enter_hs_mode_lat, exit_hs_mode_lat,
3500 exiths_clk, ddr_clk_pre, ddr_clk_post);
3501 hsa_interleave_lp = dsi_compute_interleave_lp(hsa,
3502 enter_hs_mode_lat, exit_hs_mode_lat,
3503 lp_clk_div, dsi_fclk_hsdiv);
3504 }
3505
3506 if (!hfp_blanking_mode) {
3507 hfp_interleave_hs = dsi_compute_interleave_hs(hfp, ddr_alwon,
3508 enter_hs_mode_lat, exit_hs_mode_lat,
3509 exiths_clk, ddr_clk_pre, ddr_clk_post);
3510 hfp_interleave_lp = dsi_compute_interleave_lp(hfp,
3511 enter_hs_mode_lat, exit_hs_mode_lat,
3512 lp_clk_div, dsi_fclk_hsdiv);
3513 }
3514
3515 if (!hbp_blanking_mode) {
3516 hbp_interleave_hs = dsi_compute_interleave_hs(hbp, ddr_alwon,
3517 enter_hs_mode_lat, exit_hs_mode_lat,
3518 exiths_clk, ddr_clk_pre, ddr_clk_post);
3519
3520 hbp_interleave_lp = dsi_compute_interleave_lp(hbp,
3521 enter_hs_mode_lat, exit_hs_mode_lat,
3522 lp_clk_div, dsi_fclk_hsdiv);
3523 }
3524
3525 if (!blanking_mode) {
3526 bl_interleave_hs = dsi_compute_interleave_hs(bllp, ddr_alwon,
3527 enter_hs_mode_lat, exit_hs_mode_lat,
3528 exiths_clk, ddr_clk_pre, ddr_clk_post);
3529
3530 bl_interleave_lp = dsi_compute_interleave_lp(bllp,
3531 enter_hs_mode_lat, exit_hs_mode_lat,
3532 lp_clk_div, dsi_fclk_hsdiv);
3533 }
3534
3535 DSSDBG("DSI HS interleaving(TXBYTECLKHS) HSA %d, HFP %d, HBP %d, BLLP %d\n",
3536 hsa_interleave_hs, hfp_interleave_hs, hbp_interleave_hs,
3537 bl_interleave_hs);
3538
3539 DSSDBG("DSI LP interleaving(bytes) HSA %d, HFP %d, HBP %d, BLLP %d\n",
3540 hsa_interleave_lp, hfp_interleave_lp, hbp_interleave_lp,
3541 bl_interleave_lp);
3542
3543 r = dsi_read_reg(dsidev, DSI_VM_TIMING4);
3544 r = FLD_MOD(r, hsa_interleave_hs, 23, 16);
3545 r = FLD_MOD(r, hfp_interleave_hs, 15, 8);
3546 r = FLD_MOD(r, hbp_interleave_hs, 7, 0);
3547 dsi_write_reg(dsidev, DSI_VM_TIMING4, r);
3548
3549 r = dsi_read_reg(dsidev, DSI_VM_TIMING5);
3550 r = FLD_MOD(r, hsa_interleave_lp, 23, 16);
3551 r = FLD_MOD(r, hfp_interleave_lp, 15, 8);
3552 r = FLD_MOD(r, hbp_interleave_lp, 7, 0);
3553 dsi_write_reg(dsidev, DSI_VM_TIMING5, r);
3554
3555 r = dsi_read_reg(dsidev, DSI_VM_TIMING6);
3556 r = FLD_MOD(r, bl_interleave_hs, 31, 15);
3557 r = FLD_MOD(r, bl_interleave_lp, 16, 0);
3558 dsi_write_reg(dsidev, DSI_VM_TIMING6, r);
3559 }
3560
dsi_proto_config(struct platform_device * dsidev)3561 static int dsi_proto_config(struct platform_device *dsidev)
3562 {
3563 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3564 u32 r;
3565 int buswidth = 0;
3566
3567 dsi_config_tx_fifo(dsidev, DSI_FIFO_SIZE_32,
3568 DSI_FIFO_SIZE_32,
3569 DSI_FIFO_SIZE_32,
3570 DSI_FIFO_SIZE_32);
3571
3572 dsi_config_rx_fifo(dsidev, DSI_FIFO_SIZE_32,
3573 DSI_FIFO_SIZE_32,
3574 DSI_FIFO_SIZE_32,
3575 DSI_FIFO_SIZE_32);
3576
3577 /* XXX what values for the timeouts? */
3578 dsi_set_stop_state_counter(dsidev, 0x1000, false, false);
3579 dsi_set_ta_timeout(dsidev, 0x1fff, true, true);
3580 dsi_set_lp_rx_timeout(dsidev, 0x1fff, true, true);
3581 dsi_set_hs_tx_timeout(dsidev, 0x1fff, true, true);
3582
3583 switch (dsi_get_pixel_size(dsi->pix_fmt)) {
3584 case 16:
3585 buswidth = 0;
3586 break;
3587 case 18:
3588 buswidth = 1;
3589 break;
3590 case 24:
3591 buswidth = 2;
3592 break;
3593 default:
3594 BUG();
3595 return -EINVAL;
3596 }
3597
3598 r = dsi_read_reg(dsidev, DSI_CTRL);
3599 r = FLD_MOD(r, 1, 1, 1); /* CS_RX_EN */
3600 r = FLD_MOD(r, 1, 2, 2); /* ECC_RX_EN */
3601 r = FLD_MOD(r, 1, 3, 3); /* TX_FIFO_ARBITRATION */
3602 r = FLD_MOD(r, 1, 4, 4); /* VP_CLK_RATIO, always 1, see errata*/
3603 r = FLD_MOD(r, buswidth, 7, 6); /* VP_DATA_BUS_WIDTH */
3604 r = FLD_MOD(r, 0, 8, 8); /* VP_CLK_POL */
3605 r = FLD_MOD(r, 1, 14, 14); /* TRIGGER_RESET_MODE */
3606 r = FLD_MOD(r, 1, 19, 19); /* EOT_ENABLE */
3607 if (!dss_has_feature(FEAT_DSI_DCS_CMD_CONFIG_VC)) {
3608 r = FLD_MOD(r, 1, 24, 24); /* DCS_CMD_ENABLE */
3609 /* DCS_CMD_CODE, 1=start, 0=continue */
3610 r = FLD_MOD(r, 0, 25, 25);
3611 }
3612
3613 dsi_write_reg(dsidev, DSI_CTRL, r);
3614
3615 dsi_config_vp_num_line_buffers(dsidev);
3616
3617 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3618 dsi_config_vp_sync_events(dsidev);
3619 dsi_config_blanking_modes(dsidev);
3620 dsi_config_cmd_mode_interleaving(dsidev);
3621 }
3622
3623 dsi_vc_initial_config(dsidev, 0);
3624 dsi_vc_initial_config(dsidev, 1);
3625 dsi_vc_initial_config(dsidev, 2);
3626 dsi_vc_initial_config(dsidev, 3);
3627
3628 return 0;
3629 }
3630
dsi_proto_timings(struct platform_device * dsidev)3631 static void dsi_proto_timings(struct platform_device *dsidev)
3632 {
3633 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3634 unsigned tlpx, tclk_zero, tclk_prepare;
3635 unsigned tclk_pre, tclk_post;
3636 unsigned ths_prepare, ths_prepare_ths_zero, ths_zero;
3637 unsigned ths_trail, ths_exit;
3638 unsigned ddr_clk_pre, ddr_clk_post;
3639 unsigned enter_hs_mode_lat, exit_hs_mode_lat;
3640 unsigned ths_eot;
3641 int ndl = dsi->num_lanes_used - 1;
3642 u32 r;
3643
3644 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG0);
3645 ths_prepare = FLD_GET(r, 31, 24);
3646 ths_prepare_ths_zero = FLD_GET(r, 23, 16);
3647 ths_zero = ths_prepare_ths_zero - ths_prepare;
3648 ths_trail = FLD_GET(r, 15, 8);
3649 ths_exit = FLD_GET(r, 7, 0);
3650
3651 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG1);
3652 tlpx = FLD_GET(r, 20, 16) * 2;
3653 tclk_zero = FLD_GET(r, 7, 0);
3654
3655 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG2);
3656 tclk_prepare = FLD_GET(r, 7, 0);
3657
3658 /* min 8*UI */
3659 tclk_pre = 20;
3660 /* min 60ns + 52*UI */
3661 tclk_post = ns2ddr(dsidev, 60) + 26;
3662
3663 ths_eot = DIV_ROUND_UP(4, ndl);
3664
3665 ddr_clk_pre = DIV_ROUND_UP(tclk_pre + tlpx + tclk_zero + tclk_prepare,
3666 4);
3667 ddr_clk_post = DIV_ROUND_UP(tclk_post + ths_trail, 4) + ths_eot;
3668
3669 BUG_ON(ddr_clk_pre == 0 || ddr_clk_pre > 255);
3670 BUG_ON(ddr_clk_post == 0 || ddr_clk_post > 255);
3671
3672 r = dsi_read_reg(dsidev, DSI_CLK_TIMING);
3673 r = FLD_MOD(r, ddr_clk_pre, 15, 8);
3674 r = FLD_MOD(r, ddr_clk_post, 7, 0);
3675 dsi_write_reg(dsidev, DSI_CLK_TIMING, r);
3676
3677 DSSDBG("ddr_clk_pre %u, ddr_clk_post %u\n",
3678 ddr_clk_pre,
3679 ddr_clk_post);
3680
3681 enter_hs_mode_lat = 1 + DIV_ROUND_UP(tlpx, 4) +
3682 DIV_ROUND_UP(ths_prepare, 4) +
3683 DIV_ROUND_UP(ths_zero + 3, 4);
3684
3685 exit_hs_mode_lat = DIV_ROUND_UP(ths_trail + ths_exit, 4) + 1 + ths_eot;
3686
3687 r = FLD_VAL(enter_hs_mode_lat, 31, 16) |
3688 FLD_VAL(exit_hs_mode_lat, 15, 0);
3689 dsi_write_reg(dsidev, DSI_VM_TIMING7, r);
3690
3691 DSSDBG("enter_hs_mode_lat %u, exit_hs_mode_lat %u\n",
3692 enter_hs_mode_lat, exit_hs_mode_lat);
3693
3694 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3695 /* TODO: Implement a video mode check_timings function */
3696 int hsa = dsi->vm_timings.hsa;
3697 int hfp = dsi->vm_timings.hfp;
3698 int hbp = dsi->vm_timings.hbp;
3699 int vsa = dsi->vm_timings.vsa;
3700 int vfp = dsi->vm_timings.vfp;
3701 int vbp = dsi->vm_timings.vbp;
3702 int window_sync = dsi->vm_timings.window_sync;
3703 bool hsync_end;
3704 struct omap_video_timings *timings = &dsi->timings;
3705 int bpp = dsi_get_pixel_size(dsi->pix_fmt);
3706 int tl, t_he, width_bytes;
3707
3708 hsync_end = dsi->vm_timings.trans_mode == OMAP_DSS_DSI_PULSE_MODE;
3709 t_he = hsync_end ?
3710 ((hsa == 0 && ndl == 3) ? 1 : DIV_ROUND_UP(4, ndl)) : 0;
3711
3712 width_bytes = DIV_ROUND_UP(timings->x_res * bpp, 8);
3713
3714 /* TL = t_HS + HSA + t_HE + HFP + ceil((WC + 6) / NDL) + HBP */
3715 tl = DIV_ROUND_UP(4, ndl) + (hsync_end ? hsa : 0) + t_he + hfp +
3716 DIV_ROUND_UP(width_bytes + 6, ndl) + hbp;
3717
3718 DSSDBG("HBP: %d, HFP: %d, HSA: %d, TL: %d TXBYTECLKHS\n", hbp,
3719 hfp, hsync_end ? hsa : 0, tl);
3720 DSSDBG("VBP: %d, VFP: %d, VSA: %d, VACT: %d lines\n", vbp, vfp,
3721 vsa, timings->y_res);
3722
3723 r = dsi_read_reg(dsidev, DSI_VM_TIMING1);
3724 r = FLD_MOD(r, hbp, 11, 0); /* HBP */
3725 r = FLD_MOD(r, hfp, 23, 12); /* HFP */
3726 r = FLD_MOD(r, hsync_end ? hsa : 0, 31, 24); /* HSA */
3727 dsi_write_reg(dsidev, DSI_VM_TIMING1, r);
3728
3729 r = dsi_read_reg(dsidev, DSI_VM_TIMING2);
3730 r = FLD_MOD(r, vbp, 7, 0); /* VBP */
3731 r = FLD_MOD(r, vfp, 15, 8); /* VFP */
3732 r = FLD_MOD(r, vsa, 23, 16); /* VSA */
3733 r = FLD_MOD(r, window_sync, 27, 24); /* WINDOW_SYNC */
3734 dsi_write_reg(dsidev, DSI_VM_TIMING2, r);
3735
3736 r = dsi_read_reg(dsidev, DSI_VM_TIMING3);
3737 r = FLD_MOD(r, timings->y_res, 14, 0); /* VACT */
3738 r = FLD_MOD(r, tl, 31, 16); /* TL */
3739 dsi_write_reg(dsidev, DSI_VM_TIMING3, r);
3740 }
3741 }
3742
dsi_configure_pins(struct omap_dss_device * dssdev,const struct omap_dsi_pin_config * pin_cfg)3743 static int dsi_configure_pins(struct omap_dss_device *dssdev,
3744 const struct omap_dsi_pin_config *pin_cfg)
3745 {
3746 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3747 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3748 int num_pins;
3749 const int *pins;
3750 struct dsi_lane_config lanes[DSI_MAX_NR_LANES];
3751 int num_lanes;
3752 int i;
3753
3754 static const enum dsi_lane_function functions[] = {
3755 DSI_LANE_CLK,
3756 DSI_LANE_DATA1,
3757 DSI_LANE_DATA2,
3758 DSI_LANE_DATA3,
3759 DSI_LANE_DATA4,
3760 };
3761
3762 num_pins = pin_cfg->num_pins;
3763 pins = pin_cfg->pins;
3764
3765 if (num_pins < 4 || num_pins > dsi->num_lanes_supported * 2
3766 || num_pins % 2 != 0)
3767 return -EINVAL;
3768
3769 for (i = 0; i < DSI_MAX_NR_LANES; ++i)
3770 lanes[i].function = DSI_LANE_UNUSED;
3771
3772 num_lanes = 0;
3773
3774 for (i = 0; i < num_pins; i += 2) {
3775 u8 lane, pol;
3776 int dx, dy;
3777
3778 dx = pins[i];
3779 dy = pins[i + 1];
3780
3781 if (dx < 0 || dx >= dsi->num_lanes_supported * 2)
3782 return -EINVAL;
3783
3784 if (dy < 0 || dy >= dsi->num_lanes_supported * 2)
3785 return -EINVAL;
3786
3787 if (dx & 1) {
3788 if (dy != dx - 1)
3789 return -EINVAL;
3790 pol = 1;
3791 } else {
3792 if (dy != dx + 1)
3793 return -EINVAL;
3794 pol = 0;
3795 }
3796
3797 lane = dx / 2;
3798
3799 lanes[lane].function = functions[i / 2];
3800 lanes[lane].polarity = pol;
3801 num_lanes++;
3802 }
3803
3804 memcpy(dsi->lanes, lanes, sizeof(dsi->lanes));
3805 dsi->num_lanes_used = num_lanes;
3806
3807 return 0;
3808 }
3809
dsi_enable_video_output(struct omap_dss_device * dssdev,int channel)3810 static int dsi_enable_video_output(struct omap_dss_device *dssdev, int channel)
3811 {
3812 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3813 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3814 struct omap_overlay_manager *mgr = dsi->output.manager;
3815 int bpp = dsi_get_pixel_size(dsi->pix_fmt);
3816 struct omap_dss_device *out = &dsi->output;
3817 u8 data_type;
3818 u16 word_count;
3819 int r;
3820
3821 if (out->manager == NULL) {
3822 DSSERR("failed to enable display: no output/manager\n");
3823 return -ENODEV;
3824 }
3825
3826 r = dsi_display_init_dispc(dsidev, mgr);
3827 if (r)
3828 goto err_init_dispc;
3829
3830 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3831 switch (dsi->pix_fmt) {
3832 case OMAP_DSS_DSI_FMT_RGB888:
3833 data_type = MIPI_DSI_PACKED_PIXEL_STREAM_24;
3834 break;
3835 case OMAP_DSS_DSI_FMT_RGB666:
3836 data_type = MIPI_DSI_PIXEL_STREAM_3BYTE_18;
3837 break;
3838 case OMAP_DSS_DSI_FMT_RGB666_PACKED:
3839 data_type = MIPI_DSI_PACKED_PIXEL_STREAM_18;
3840 break;
3841 case OMAP_DSS_DSI_FMT_RGB565:
3842 data_type = MIPI_DSI_PACKED_PIXEL_STREAM_16;
3843 break;
3844 default:
3845 r = -EINVAL;
3846 goto err_pix_fmt;
3847 }
3848
3849 dsi_if_enable(dsidev, false);
3850 dsi_vc_enable(dsidev, channel, false);
3851
3852 /* MODE, 1 = video mode */
3853 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), 1, 4, 4);
3854
3855 word_count = DIV_ROUND_UP(dsi->timings.x_res * bpp, 8);
3856
3857 dsi_vc_write_long_header(dsidev, channel, data_type,
3858 word_count, 0);
3859
3860 dsi_vc_enable(dsidev, channel, true);
3861 dsi_if_enable(dsidev, true);
3862 }
3863
3864 r = dss_mgr_enable(mgr);
3865 if (r)
3866 goto err_mgr_enable;
3867
3868 return 0;
3869
3870 err_mgr_enable:
3871 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3872 dsi_if_enable(dsidev, false);
3873 dsi_vc_enable(dsidev, channel, false);
3874 }
3875 err_pix_fmt:
3876 dsi_display_uninit_dispc(dsidev, mgr);
3877 err_init_dispc:
3878 return r;
3879 }
3880
dsi_disable_video_output(struct omap_dss_device * dssdev,int channel)3881 static void dsi_disable_video_output(struct omap_dss_device *dssdev, int channel)
3882 {
3883 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3884 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3885 struct omap_overlay_manager *mgr = dsi->output.manager;
3886
3887 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3888 dsi_if_enable(dsidev, false);
3889 dsi_vc_enable(dsidev, channel, false);
3890
3891 /* MODE, 0 = command mode */
3892 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), 0, 4, 4);
3893
3894 dsi_vc_enable(dsidev, channel, true);
3895 dsi_if_enable(dsidev, true);
3896 }
3897
3898 dss_mgr_disable(mgr);
3899
3900 dsi_display_uninit_dispc(dsidev, mgr);
3901 }
3902
dsi_update_screen_dispc(struct platform_device * dsidev)3903 static void dsi_update_screen_dispc(struct platform_device *dsidev)
3904 {
3905 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3906 struct omap_overlay_manager *mgr = dsi->output.manager;
3907 unsigned bytespp;
3908 unsigned bytespl;
3909 unsigned bytespf;
3910 unsigned total_len;
3911 unsigned packet_payload;
3912 unsigned packet_len;
3913 u32 l;
3914 int r;
3915 const unsigned channel = dsi->update_channel;
3916 const unsigned line_buf_size = dsi->line_buffer_size;
3917 u16 w = dsi->timings.x_res;
3918 u16 h = dsi->timings.y_res;
3919
3920 DSSDBG("dsi_update_screen_dispc(%dx%d)\n", w, h);
3921
3922 dsi_vc_config_source(dsidev, channel, DSI_VC_SOURCE_VP);
3923
3924 bytespp = dsi_get_pixel_size(dsi->pix_fmt) / 8;
3925 bytespl = w * bytespp;
3926 bytespf = bytespl * h;
3927
3928 /* NOTE: packet_payload has to be equal to N * bytespl, where N is
3929 * number of lines in a packet. See errata about VP_CLK_RATIO */
3930
3931 if (bytespf < line_buf_size)
3932 packet_payload = bytespf;
3933 else
3934 packet_payload = (line_buf_size) / bytespl * bytespl;
3935
3936 packet_len = packet_payload + 1; /* 1 byte for DCS cmd */
3937 total_len = (bytespf / packet_payload) * packet_len;
3938
3939 if (bytespf % packet_payload)
3940 total_len += (bytespf % packet_payload) + 1;
3941
3942 l = FLD_VAL(total_len, 23, 0); /* TE_SIZE */
3943 dsi_write_reg(dsidev, DSI_VC_TE(channel), l);
3944
3945 dsi_vc_write_long_header(dsidev, channel, MIPI_DSI_DCS_LONG_WRITE,
3946 packet_len, 0);
3947
3948 if (dsi->te_enabled)
3949 l = FLD_MOD(l, 1, 30, 30); /* TE_EN */
3950 else
3951 l = FLD_MOD(l, 1, 31, 31); /* TE_START */
3952 dsi_write_reg(dsidev, DSI_VC_TE(channel), l);
3953
3954 /* We put SIDLEMODE to no-idle for the duration of the transfer,
3955 * because DSS interrupts are not capable of waking up the CPU and the
3956 * framedone interrupt could be delayed for quite a long time. I think
3957 * the same goes for any DSS interrupts, but for some reason I have not
3958 * seen the problem anywhere else than here.
3959 */
3960 dispc_disable_sidle();
3961
3962 dsi_perf_mark_start(dsidev);
3963
3964 r = schedule_delayed_work(&dsi->framedone_timeout_work,
3965 msecs_to_jiffies(250));
3966 BUG_ON(r == 0);
3967
3968 dss_mgr_set_timings(mgr, &dsi->timings);
3969
3970 dss_mgr_start_update(mgr);
3971
3972 if (dsi->te_enabled) {
3973 /* disable LP_RX_TO, so that we can receive TE. Time to wait
3974 * for TE is longer than the timer allows */
3975 REG_FLD_MOD(dsidev, DSI_TIMING2, 0, 15, 15); /* LP_RX_TO */
3976
3977 dsi_vc_send_bta(dsidev, channel);
3978
3979 #ifdef DSI_CATCH_MISSING_TE
3980 mod_timer(&dsi->te_timer, jiffies + msecs_to_jiffies(250));
3981 #endif
3982 }
3983 }
3984
3985 #ifdef DSI_CATCH_MISSING_TE
dsi_te_timeout(struct timer_list * unused)3986 static void dsi_te_timeout(struct timer_list *unused)
3987 {
3988 DSSERR("TE not received for 250ms!\n");
3989 }
3990 #endif
3991
dsi_handle_framedone(struct platform_device * dsidev,int error)3992 static void dsi_handle_framedone(struct platform_device *dsidev, int error)
3993 {
3994 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3995
3996 /* SIDLEMODE back to smart-idle */
3997 dispc_enable_sidle();
3998
3999 if (dsi->te_enabled) {
4000 /* enable LP_RX_TO again after the TE */
4001 REG_FLD_MOD(dsidev, DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */
4002 }
4003
4004 dsi->framedone_callback(error, dsi->framedone_data);
4005
4006 if (!error)
4007 dsi_perf_show(dsidev, "DISPC");
4008 }
4009
dsi_framedone_timeout_work_callback(struct work_struct * work)4010 static void dsi_framedone_timeout_work_callback(struct work_struct *work)
4011 {
4012 struct dsi_data *dsi = container_of(work, struct dsi_data,
4013 framedone_timeout_work.work);
4014 /* XXX While extremely unlikely, we could get FRAMEDONE interrupt after
4015 * 250ms which would conflict with this timeout work. What should be
4016 * done is first cancel the transfer on the HW, and then cancel the
4017 * possibly scheduled framedone work. However, cancelling the transfer
4018 * on the HW is buggy, and would probably require resetting the whole
4019 * DSI */
4020
4021 DSSERR("Framedone not received for 250ms!\n");
4022
4023 dsi_handle_framedone(dsi->pdev, -ETIMEDOUT);
4024 }
4025
dsi_framedone_irq_callback(void * data)4026 static void dsi_framedone_irq_callback(void *data)
4027 {
4028 struct platform_device *dsidev = (struct platform_device *) data;
4029 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4030
4031 /* Note: We get FRAMEDONE when DISPC has finished sending pixels and
4032 * turns itself off. However, DSI still has the pixels in its buffers,
4033 * and is sending the data.
4034 */
4035
4036 cancel_delayed_work(&dsi->framedone_timeout_work);
4037
4038 dsi_handle_framedone(dsidev, 0);
4039 }
4040
dsi_update(struct omap_dss_device * dssdev,int channel,void (* callback)(int,void *),void * data)4041 static int dsi_update(struct omap_dss_device *dssdev, int channel,
4042 void (*callback)(int, void *), void *data)
4043 {
4044 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4045 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4046
4047 dsi_perf_mark_setup(dsidev);
4048
4049 dsi->update_channel = channel;
4050
4051 dsi->framedone_callback = callback;
4052 dsi->framedone_data = data;
4053
4054 #ifdef DSI_PERF_MEASURE
4055 dsi->update_bytes = dsi->timings.x_res * dsi->timings.y_res *
4056 dsi_get_pixel_size(dsi->pix_fmt) / 8;
4057 #endif
4058 dsi_update_screen_dispc(dsidev);
4059
4060 return 0;
4061 }
4062
4063 /* Display funcs */
4064
dsi_configure_dispc_clocks(struct platform_device * dsidev)4065 static int dsi_configure_dispc_clocks(struct platform_device *dsidev)
4066 {
4067 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4068 struct dispc_clock_info dispc_cinfo;
4069 int r;
4070 unsigned long fck;
4071
4072 fck = dsi_get_pll_hsdiv_dispc_rate(dsidev);
4073
4074 dispc_cinfo.lck_div = dsi->user_dispc_cinfo.lck_div;
4075 dispc_cinfo.pck_div = dsi->user_dispc_cinfo.pck_div;
4076
4077 r = dispc_calc_clock_rates(fck, &dispc_cinfo);
4078 if (r) {
4079 DSSERR("Failed to calc dispc clocks\n");
4080 return r;
4081 }
4082
4083 dsi->mgr_config.clock_info = dispc_cinfo;
4084
4085 return 0;
4086 }
4087
dsi_display_init_dispc(struct platform_device * dsidev,struct omap_overlay_manager * mgr)4088 static int dsi_display_init_dispc(struct platform_device *dsidev,
4089 struct omap_overlay_manager *mgr)
4090 {
4091 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4092 int r;
4093
4094 dss_select_lcd_clk_source(mgr->id, dsi->module_id == 0 ?
4095 OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC :
4096 OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC);
4097
4098 if (dsi->mode == OMAP_DSS_DSI_CMD_MODE) {
4099 r = dss_mgr_register_framedone_handler(mgr,
4100 dsi_framedone_irq_callback, dsidev);
4101 if (r) {
4102 DSSERR("can't register FRAMEDONE handler\n");
4103 goto err;
4104 }
4105
4106 dsi->mgr_config.stallmode = true;
4107 dsi->mgr_config.fifohandcheck = true;
4108 } else {
4109 dsi->mgr_config.stallmode = false;
4110 dsi->mgr_config.fifohandcheck = false;
4111 }
4112
4113 /*
4114 * override interlace, logic level and edge related parameters in
4115 * omap_video_timings with default values
4116 */
4117 dsi->timings.interlace = false;
4118 dsi->timings.hsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
4119 dsi->timings.vsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
4120 dsi->timings.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
4121 dsi->timings.de_level = OMAPDSS_SIG_ACTIVE_HIGH;
4122 dsi->timings.sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
4123
4124 dss_mgr_set_timings(mgr, &dsi->timings);
4125
4126 r = dsi_configure_dispc_clocks(dsidev);
4127 if (r)
4128 goto err1;
4129
4130 dsi->mgr_config.io_pad_mode = DSS_IO_PAD_MODE_BYPASS;
4131 dsi->mgr_config.video_port_width =
4132 dsi_get_pixel_size(dsi->pix_fmt);
4133 dsi->mgr_config.lcden_sig_polarity = 0;
4134
4135 dss_mgr_set_lcd_config(mgr, &dsi->mgr_config);
4136
4137 return 0;
4138 err1:
4139 if (dsi->mode == OMAP_DSS_DSI_CMD_MODE)
4140 dss_mgr_unregister_framedone_handler(mgr,
4141 dsi_framedone_irq_callback, dsidev);
4142 err:
4143 dss_select_lcd_clk_source(mgr->id, OMAP_DSS_CLK_SRC_FCK);
4144 return r;
4145 }
4146
dsi_display_uninit_dispc(struct platform_device * dsidev,struct omap_overlay_manager * mgr)4147 static void dsi_display_uninit_dispc(struct platform_device *dsidev,
4148 struct omap_overlay_manager *mgr)
4149 {
4150 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4151
4152 if (dsi->mode == OMAP_DSS_DSI_CMD_MODE)
4153 dss_mgr_unregister_framedone_handler(mgr,
4154 dsi_framedone_irq_callback, dsidev);
4155
4156 dss_select_lcd_clk_source(mgr->id, OMAP_DSS_CLK_SRC_FCK);
4157 }
4158
dsi_configure_dsi_clocks(struct platform_device * dsidev)4159 static int dsi_configure_dsi_clocks(struct platform_device *dsidev)
4160 {
4161 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4162 struct dss_pll_clock_info cinfo;
4163 int r;
4164
4165 cinfo = dsi->user_dsi_cinfo;
4166
4167 r = dss_pll_set_config(&dsi->pll, &cinfo);
4168 if (r) {
4169 DSSERR("Failed to set dsi clocks\n");
4170 return r;
4171 }
4172
4173 return 0;
4174 }
4175
dsi_display_init_dsi(struct platform_device * dsidev)4176 static int dsi_display_init_dsi(struct platform_device *dsidev)
4177 {
4178 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4179 int r;
4180
4181 r = dss_pll_enable(&dsi->pll);
4182 if (r)
4183 goto err0;
4184
4185 r = dsi_configure_dsi_clocks(dsidev);
4186 if (r)
4187 goto err1;
4188
4189 dss_select_dsi_clk_source(dsi->module_id, dsi->module_id == 0 ?
4190 OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI :
4191 OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI);
4192
4193 DSSDBG("PLL OK\n");
4194
4195 r = dsi_cio_init(dsidev);
4196 if (r)
4197 goto err2;
4198
4199 _dsi_print_reset_status(dsidev);
4200
4201 dsi_proto_timings(dsidev);
4202 dsi_set_lp_clk_divisor(dsidev);
4203
4204 if (1)
4205 _dsi_print_reset_status(dsidev);
4206
4207 r = dsi_proto_config(dsidev);
4208 if (r)
4209 goto err3;
4210
4211 /* enable interface */
4212 dsi_vc_enable(dsidev, 0, 1);
4213 dsi_vc_enable(dsidev, 1, 1);
4214 dsi_vc_enable(dsidev, 2, 1);
4215 dsi_vc_enable(dsidev, 3, 1);
4216 dsi_if_enable(dsidev, 1);
4217 dsi_force_tx_stop_mode_io(dsidev);
4218
4219 return 0;
4220 err3:
4221 dsi_cio_uninit(dsidev);
4222 err2:
4223 dss_select_dsi_clk_source(dsi->module_id, OMAP_DSS_CLK_SRC_FCK);
4224 err1:
4225 dss_pll_disable(&dsi->pll);
4226 err0:
4227 return r;
4228 }
4229
dsi_display_uninit_dsi(struct platform_device * dsidev,bool disconnect_lanes,bool enter_ulps)4230 static void dsi_display_uninit_dsi(struct platform_device *dsidev,
4231 bool disconnect_lanes, bool enter_ulps)
4232 {
4233 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4234
4235 if (enter_ulps && !dsi->ulps_enabled)
4236 dsi_enter_ulps(dsidev);
4237
4238 /* disable interface */
4239 dsi_if_enable(dsidev, 0);
4240 dsi_vc_enable(dsidev, 0, 0);
4241 dsi_vc_enable(dsidev, 1, 0);
4242 dsi_vc_enable(dsidev, 2, 0);
4243 dsi_vc_enable(dsidev, 3, 0);
4244
4245 dss_select_dsi_clk_source(dsi->module_id, OMAP_DSS_CLK_SRC_FCK);
4246 dsi_cio_uninit(dsidev);
4247 dsi_pll_uninit(dsidev, disconnect_lanes);
4248 }
4249
dsi_display_enable(struct omap_dss_device * dssdev)4250 static int dsi_display_enable(struct omap_dss_device *dssdev)
4251 {
4252 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4253 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4254 int r = 0;
4255
4256 DSSDBG("dsi_display_enable\n");
4257
4258 WARN_ON(!dsi_bus_is_locked(dsidev));
4259
4260 mutex_lock(&dsi->lock);
4261
4262 r = dsi_runtime_get(dsidev);
4263 if (r)
4264 goto err_get_dsi;
4265
4266 _dsi_initialize_irq(dsidev);
4267
4268 r = dsi_display_init_dsi(dsidev);
4269 if (r)
4270 goto err_init_dsi;
4271
4272 mutex_unlock(&dsi->lock);
4273
4274 return 0;
4275
4276 err_init_dsi:
4277 dsi_runtime_put(dsidev);
4278 err_get_dsi:
4279 mutex_unlock(&dsi->lock);
4280 DSSDBG("dsi_display_enable FAILED\n");
4281 return r;
4282 }
4283
dsi_display_disable(struct omap_dss_device * dssdev,bool disconnect_lanes,bool enter_ulps)4284 static void dsi_display_disable(struct omap_dss_device *dssdev,
4285 bool disconnect_lanes, bool enter_ulps)
4286 {
4287 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4288 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4289
4290 DSSDBG("dsi_display_disable\n");
4291
4292 WARN_ON(!dsi_bus_is_locked(dsidev));
4293
4294 mutex_lock(&dsi->lock);
4295
4296 dsi_sync_vc(dsidev, 0);
4297 dsi_sync_vc(dsidev, 1);
4298 dsi_sync_vc(dsidev, 2);
4299 dsi_sync_vc(dsidev, 3);
4300
4301 dsi_display_uninit_dsi(dsidev, disconnect_lanes, enter_ulps);
4302
4303 dsi_runtime_put(dsidev);
4304
4305 mutex_unlock(&dsi->lock);
4306 }
4307
dsi_enable_te(struct omap_dss_device * dssdev,bool enable)4308 static int dsi_enable_te(struct omap_dss_device *dssdev, bool enable)
4309 {
4310 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4311 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4312
4313 dsi->te_enabled = enable;
4314 return 0;
4315 }
4316
4317 #ifdef PRINT_VERBOSE_VM_TIMINGS
print_dsi_vm(const char * str,const struct omap_dss_dsi_videomode_timings * t)4318 static void print_dsi_vm(const char *str,
4319 const struct omap_dss_dsi_videomode_timings *t)
4320 {
4321 unsigned long byteclk = t->hsclk / 4;
4322 int bl, wc, pps, tot;
4323
4324 wc = DIV_ROUND_UP(t->hact * t->bitspp, 8);
4325 pps = DIV_ROUND_UP(wc + 6, t->ndl); /* pixel packet size */
4326 bl = t->hss + t->hsa + t->hse + t->hbp + t->hfp;
4327 tot = bl + pps;
4328
4329 #define TO_DSI_T(x) ((u32)div64_u64((u64)x * 1000000000llu, byteclk))
4330
4331 pr_debug("%s bck %lu, %u/%u/%u/%u/%u/%u = %u+%u = %u, "
4332 "%u/%u/%u/%u/%u/%u = %u + %u = %u\n",
4333 str,
4334 byteclk,
4335 t->hss, t->hsa, t->hse, t->hbp, pps, t->hfp,
4336 bl, pps, tot,
4337 TO_DSI_T(t->hss),
4338 TO_DSI_T(t->hsa),
4339 TO_DSI_T(t->hse),
4340 TO_DSI_T(t->hbp),
4341 TO_DSI_T(pps),
4342 TO_DSI_T(t->hfp),
4343
4344 TO_DSI_T(bl),
4345 TO_DSI_T(pps),
4346
4347 TO_DSI_T(tot));
4348 #undef TO_DSI_T
4349 }
4350
print_dispc_vm(const char * str,const struct omap_video_timings * t)4351 static void print_dispc_vm(const char *str, const struct omap_video_timings *t)
4352 {
4353 unsigned long pck = t->pixelclock;
4354 int hact, bl, tot;
4355
4356 hact = t->x_res;
4357 bl = t->hsw + t->hbp + t->hfp;
4358 tot = hact + bl;
4359
4360 #define TO_DISPC_T(x) ((u32)div64_u64((u64)x * 1000000000llu, pck))
4361
4362 pr_debug("%s pck %lu, %u/%u/%u/%u = %u+%u = %u, "
4363 "%u/%u/%u/%u = %u + %u = %u\n",
4364 str,
4365 pck,
4366 t->hsw, t->hbp, hact, t->hfp,
4367 bl, hact, tot,
4368 TO_DISPC_T(t->hsw),
4369 TO_DISPC_T(t->hbp),
4370 TO_DISPC_T(hact),
4371 TO_DISPC_T(t->hfp),
4372 TO_DISPC_T(bl),
4373 TO_DISPC_T(hact),
4374 TO_DISPC_T(tot));
4375 #undef TO_DISPC_T
4376 }
4377
4378 /* note: this is not quite accurate */
print_dsi_dispc_vm(const char * str,const struct omap_dss_dsi_videomode_timings * t)4379 static void print_dsi_dispc_vm(const char *str,
4380 const struct omap_dss_dsi_videomode_timings *t)
4381 {
4382 struct omap_video_timings vm = { 0 };
4383 unsigned long byteclk = t->hsclk / 4;
4384 unsigned long pck;
4385 u64 dsi_tput;
4386 int dsi_hact, dsi_htot;
4387
4388 dsi_tput = (u64)byteclk * t->ndl * 8;
4389 pck = (u32)div64_u64(dsi_tput, t->bitspp);
4390 dsi_hact = DIV_ROUND_UP(DIV_ROUND_UP(t->hact * t->bitspp, 8) + 6, t->ndl);
4391 dsi_htot = t->hss + t->hsa + t->hse + t->hbp + dsi_hact + t->hfp;
4392
4393 vm.pixelclock = pck;
4394 vm.hsw = div64_u64((u64)(t->hsa + t->hse) * pck, byteclk);
4395 vm.hbp = div64_u64((u64)t->hbp * pck, byteclk);
4396 vm.hfp = div64_u64((u64)t->hfp * pck, byteclk);
4397 vm.x_res = t->hact;
4398
4399 print_dispc_vm(str, &vm);
4400 }
4401 #endif /* PRINT_VERBOSE_VM_TIMINGS */
4402
dsi_cm_calc_dispc_cb(int lckd,int pckd,unsigned long lck,unsigned long pck,void * data)4403 static bool dsi_cm_calc_dispc_cb(int lckd, int pckd, unsigned long lck,
4404 unsigned long pck, void *data)
4405 {
4406 struct dsi_clk_calc_ctx *ctx = data;
4407 struct omap_video_timings *t = &ctx->dispc_vm;
4408
4409 ctx->dispc_cinfo.lck_div = lckd;
4410 ctx->dispc_cinfo.pck_div = pckd;
4411 ctx->dispc_cinfo.lck = lck;
4412 ctx->dispc_cinfo.pck = pck;
4413
4414 *t = *ctx->config->timings;
4415 t->pixelclock = pck;
4416 t->x_res = ctx->config->timings->x_res;
4417 t->y_res = ctx->config->timings->y_res;
4418 t->hsw = t->hfp = t->hbp = t->vsw = 1;
4419 t->vfp = t->vbp = 0;
4420
4421 return true;
4422 }
4423
dsi_cm_calc_hsdiv_cb(int m_dispc,unsigned long dispc,void * data)4424 static bool dsi_cm_calc_hsdiv_cb(int m_dispc, unsigned long dispc,
4425 void *data)
4426 {
4427 struct dsi_clk_calc_ctx *ctx = data;
4428
4429 ctx->dsi_cinfo.mX[HSDIV_DISPC] = m_dispc;
4430 ctx->dsi_cinfo.clkout[HSDIV_DISPC] = dispc;
4431
4432 return dispc_div_calc(dispc, ctx->req_pck_min, ctx->req_pck_max,
4433 dsi_cm_calc_dispc_cb, ctx);
4434 }
4435
dsi_cm_calc_pll_cb(int n,int m,unsigned long fint,unsigned long clkdco,void * data)4436 static bool dsi_cm_calc_pll_cb(int n, int m, unsigned long fint,
4437 unsigned long clkdco, void *data)
4438 {
4439 struct dsi_clk_calc_ctx *ctx = data;
4440
4441 ctx->dsi_cinfo.n = n;
4442 ctx->dsi_cinfo.m = m;
4443 ctx->dsi_cinfo.fint = fint;
4444 ctx->dsi_cinfo.clkdco = clkdco;
4445
4446 return dss_pll_hsdiv_calc(ctx->pll, clkdco, ctx->req_pck_min,
4447 dss_feat_get_param_max(FEAT_PARAM_DSS_FCK),
4448 dsi_cm_calc_hsdiv_cb, ctx);
4449 }
4450
dsi_cm_calc(struct dsi_data * dsi,const struct omap_dss_dsi_config * cfg,struct dsi_clk_calc_ctx * ctx)4451 static bool dsi_cm_calc(struct dsi_data *dsi,
4452 const struct omap_dss_dsi_config *cfg,
4453 struct dsi_clk_calc_ctx *ctx)
4454 {
4455 unsigned long clkin;
4456 int bitspp, ndl;
4457 unsigned long pll_min, pll_max;
4458 unsigned long pck, txbyteclk;
4459
4460 clkin = clk_get_rate(dsi->pll.clkin);
4461 bitspp = dsi_get_pixel_size(cfg->pixel_format);
4462 ndl = dsi->num_lanes_used - 1;
4463
4464 /*
4465 * Here we should calculate minimum txbyteclk to be able to send the
4466 * frame in time, and also to handle TE. That's not very simple, though,
4467 * especially as we go to LP between each pixel packet due to HW
4468 * "feature". So let's just estimate very roughly and multiply by 1.5.
4469 */
4470 pck = cfg->timings->pixelclock;
4471 pck = pck * 3 / 2;
4472 txbyteclk = pck * bitspp / 8 / ndl;
4473
4474 memset(ctx, 0, sizeof(*ctx));
4475 ctx->dsidev = dsi->pdev;
4476 ctx->pll = &dsi->pll;
4477 ctx->config = cfg;
4478 ctx->req_pck_min = pck;
4479 ctx->req_pck_nom = pck;
4480 ctx->req_pck_max = pck * 3 / 2;
4481
4482 pll_min = max(cfg->hs_clk_min * 4, txbyteclk * 4 * 4);
4483 pll_max = cfg->hs_clk_max * 4;
4484
4485 return dss_pll_calc(ctx->pll, clkin,
4486 pll_min, pll_max,
4487 dsi_cm_calc_pll_cb, ctx);
4488 }
4489
dsi_vm_calc_blanking(struct dsi_clk_calc_ctx * ctx)4490 static bool dsi_vm_calc_blanking(struct dsi_clk_calc_ctx *ctx)
4491 {
4492 struct dsi_data *dsi = dsi_get_dsidrv_data(ctx->dsidev);
4493 const struct omap_dss_dsi_config *cfg = ctx->config;
4494 int bitspp = dsi_get_pixel_size(cfg->pixel_format);
4495 int ndl = dsi->num_lanes_used - 1;
4496 unsigned long hsclk = ctx->dsi_cinfo.clkdco / 4;
4497 unsigned long byteclk = hsclk / 4;
4498
4499 unsigned long dispc_pck, req_pck_min, req_pck_nom, req_pck_max;
4500 int xres;
4501 int panel_htot, panel_hbl; /* pixels */
4502 int dispc_htot, dispc_hbl; /* pixels */
4503 int dsi_htot, dsi_hact, dsi_hbl, hss, hse; /* byteclks */
4504 int hfp, hsa, hbp;
4505 const struct omap_video_timings *req_vm;
4506 struct omap_video_timings *dispc_vm;
4507 struct omap_dss_dsi_videomode_timings *dsi_vm;
4508 u64 dsi_tput, dispc_tput;
4509
4510 dsi_tput = (u64)byteclk * ndl * 8;
4511
4512 req_vm = cfg->timings;
4513 req_pck_min = ctx->req_pck_min;
4514 req_pck_max = ctx->req_pck_max;
4515 req_pck_nom = ctx->req_pck_nom;
4516
4517 dispc_pck = ctx->dispc_cinfo.pck;
4518 dispc_tput = (u64)dispc_pck * bitspp;
4519
4520 xres = req_vm->x_res;
4521
4522 panel_hbl = req_vm->hfp + req_vm->hbp + req_vm->hsw;
4523 panel_htot = xres + panel_hbl;
4524
4525 dsi_hact = DIV_ROUND_UP(DIV_ROUND_UP(xres * bitspp, 8) + 6, ndl);
4526
4527 /*
4528 * When there are no line buffers, DISPC and DSI must have the
4529 * same tput. Otherwise DISPC tput needs to be higher than DSI's.
4530 */
4531 if (dsi->line_buffer_size < xres * bitspp / 8) {
4532 if (dispc_tput != dsi_tput)
4533 return false;
4534 } else {
4535 if (dispc_tput < dsi_tput)
4536 return false;
4537 }
4538
4539 /* DSI tput must be over the min requirement */
4540 if (dsi_tput < (u64)bitspp * req_pck_min)
4541 return false;
4542
4543 /* When non-burst mode, DSI tput must be below max requirement. */
4544 if (cfg->trans_mode != OMAP_DSS_DSI_BURST_MODE) {
4545 if (dsi_tput > (u64)bitspp * req_pck_max)
4546 return false;
4547 }
4548
4549 hss = DIV_ROUND_UP(4, ndl);
4550
4551 if (cfg->trans_mode == OMAP_DSS_DSI_PULSE_MODE) {
4552 if (ndl == 3 && req_vm->hsw == 0)
4553 hse = 1;
4554 else
4555 hse = DIV_ROUND_UP(4, ndl);
4556 } else {
4557 hse = 0;
4558 }
4559
4560 /* DSI htot to match the panel's nominal pck */
4561 dsi_htot = div64_u64((u64)panel_htot * byteclk, req_pck_nom);
4562
4563 /* fail if there would be no time for blanking */
4564 if (dsi_htot < hss + hse + dsi_hact)
4565 return false;
4566
4567 /* total DSI blanking needed to achieve panel's TL */
4568 dsi_hbl = dsi_htot - dsi_hact;
4569
4570 /* DISPC htot to match the DSI TL */
4571 dispc_htot = div64_u64((u64)dsi_htot * dispc_pck, byteclk);
4572
4573 /* verify that the DSI and DISPC TLs are the same */
4574 if ((u64)dsi_htot * dispc_pck != (u64)dispc_htot * byteclk)
4575 return false;
4576
4577 dispc_hbl = dispc_htot - xres;
4578
4579 /* setup DSI videomode */
4580
4581 dsi_vm = &ctx->dsi_vm;
4582 memset(dsi_vm, 0, sizeof(*dsi_vm));
4583
4584 dsi_vm->hsclk = hsclk;
4585
4586 dsi_vm->ndl = ndl;
4587 dsi_vm->bitspp = bitspp;
4588
4589 if (cfg->trans_mode != OMAP_DSS_DSI_PULSE_MODE) {
4590 hsa = 0;
4591 } else if (ndl == 3 && req_vm->hsw == 0) {
4592 hsa = 0;
4593 } else {
4594 hsa = div64_u64((u64)req_vm->hsw * byteclk, req_pck_nom);
4595 hsa = max(hsa - hse, 1);
4596 }
4597
4598 hbp = div64_u64((u64)req_vm->hbp * byteclk, req_pck_nom);
4599 hbp = max(hbp, 1);
4600
4601 hfp = dsi_hbl - (hss + hsa + hse + hbp);
4602 if (hfp < 1) {
4603 int t;
4604 /* we need to take cycles from hbp */
4605
4606 t = 1 - hfp;
4607 hbp = max(hbp - t, 1);
4608 hfp = dsi_hbl - (hss + hsa + hse + hbp);
4609
4610 if (hfp < 1 && hsa > 0) {
4611 /* we need to take cycles from hsa */
4612 t = 1 - hfp;
4613 hsa = max(hsa - t, 1);
4614 hfp = dsi_hbl - (hss + hsa + hse + hbp);
4615 }
4616 }
4617
4618 if (hfp < 1)
4619 return false;
4620
4621 dsi_vm->hss = hss;
4622 dsi_vm->hsa = hsa;
4623 dsi_vm->hse = hse;
4624 dsi_vm->hbp = hbp;
4625 dsi_vm->hact = xres;
4626 dsi_vm->hfp = hfp;
4627
4628 dsi_vm->vsa = req_vm->vsw;
4629 dsi_vm->vbp = req_vm->vbp;
4630 dsi_vm->vact = req_vm->y_res;
4631 dsi_vm->vfp = req_vm->vfp;
4632
4633 dsi_vm->trans_mode = cfg->trans_mode;
4634
4635 dsi_vm->blanking_mode = 0;
4636 dsi_vm->hsa_blanking_mode = 1;
4637 dsi_vm->hfp_blanking_mode = 1;
4638 dsi_vm->hbp_blanking_mode = 1;
4639
4640 dsi_vm->ddr_clk_always_on = cfg->ddr_clk_always_on;
4641 dsi_vm->window_sync = 4;
4642
4643 /* setup DISPC videomode */
4644
4645 dispc_vm = &ctx->dispc_vm;
4646 *dispc_vm = *req_vm;
4647 dispc_vm->pixelclock = dispc_pck;
4648
4649 if (cfg->trans_mode == OMAP_DSS_DSI_PULSE_MODE) {
4650 hsa = div64_u64((u64)req_vm->hsw * dispc_pck,
4651 req_pck_nom);
4652 hsa = max(hsa, 1);
4653 } else {
4654 hsa = 1;
4655 }
4656
4657 hbp = div64_u64((u64)req_vm->hbp * dispc_pck, req_pck_nom);
4658 hbp = max(hbp, 1);
4659
4660 hfp = dispc_hbl - hsa - hbp;
4661 if (hfp < 1) {
4662 int t;
4663 /* we need to take cycles from hbp */
4664
4665 t = 1 - hfp;
4666 hbp = max(hbp - t, 1);
4667 hfp = dispc_hbl - hsa - hbp;
4668
4669 if (hfp < 1) {
4670 /* we need to take cycles from hsa */
4671 t = 1 - hfp;
4672 hsa = max(hsa - t, 1);
4673 hfp = dispc_hbl - hsa - hbp;
4674 }
4675 }
4676
4677 if (hfp < 1)
4678 return false;
4679
4680 dispc_vm->hfp = hfp;
4681 dispc_vm->hsw = hsa;
4682 dispc_vm->hbp = hbp;
4683
4684 return true;
4685 }
4686
4687
dsi_vm_calc_dispc_cb(int lckd,int pckd,unsigned long lck,unsigned long pck,void * data)4688 static bool dsi_vm_calc_dispc_cb(int lckd, int pckd, unsigned long lck,
4689 unsigned long pck, void *data)
4690 {
4691 struct dsi_clk_calc_ctx *ctx = data;
4692
4693 ctx->dispc_cinfo.lck_div = lckd;
4694 ctx->dispc_cinfo.pck_div = pckd;
4695 ctx->dispc_cinfo.lck = lck;
4696 ctx->dispc_cinfo.pck = pck;
4697
4698 if (dsi_vm_calc_blanking(ctx) == false)
4699 return false;
4700
4701 #ifdef PRINT_VERBOSE_VM_TIMINGS
4702 print_dispc_vm("dispc", &ctx->dispc_vm);
4703 print_dsi_vm("dsi ", &ctx->dsi_vm);
4704 print_dispc_vm("req ", ctx->config->timings);
4705 print_dsi_dispc_vm("act ", &ctx->dsi_vm);
4706 #endif
4707
4708 return true;
4709 }
4710
dsi_vm_calc_hsdiv_cb(int m_dispc,unsigned long dispc,void * data)4711 static bool dsi_vm_calc_hsdiv_cb(int m_dispc, unsigned long dispc,
4712 void *data)
4713 {
4714 struct dsi_clk_calc_ctx *ctx = data;
4715 unsigned long pck_max;
4716
4717 ctx->dsi_cinfo.mX[HSDIV_DISPC] = m_dispc;
4718 ctx->dsi_cinfo.clkout[HSDIV_DISPC] = dispc;
4719
4720 /*
4721 * In burst mode we can let the dispc pck be arbitrarily high, but it
4722 * limits our scaling abilities. So for now, don't aim too high.
4723 */
4724
4725 if (ctx->config->trans_mode == OMAP_DSS_DSI_BURST_MODE)
4726 pck_max = ctx->req_pck_max + 10000000;
4727 else
4728 pck_max = ctx->req_pck_max;
4729
4730 return dispc_div_calc(dispc, ctx->req_pck_min, pck_max,
4731 dsi_vm_calc_dispc_cb, ctx);
4732 }
4733
dsi_vm_calc_pll_cb(int n,int m,unsigned long fint,unsigned long clkdco,void * data)4734 static bool dsi_vm_calc_pll_cb(int n, int m, unsigned long fint,
4735 unsigned long clkdco, void *data)
4736 {
4737 struct dsi_clk_calc_ctx *ctx = data;
4738
4739 ctx->dsi_cinfo.n = n;
4740 ctx->dsi_cinfo.m = m;
4741 ctx->dsi_cinfo.fint = fint;
4742 ctx->dsi_cinfo.clkdco = clkdco;
4743
4744 return dss_pll_hsdiv_calc(ctx->pll, clkdco, ctx->req_pck_min,
4745 dss_feat_get_param_max(FEAT_PARAM_DSS_FCK),
4746 dsi_vm_calc_hsdiv_cb, ctx);
4747 }
4748
dsi_vm_calc(struct dsi_data * dsi,const struct omap_dss_dsi_config * cfg,struct dsi_clk_calc_ctx * ctx)4749 static bool dsi_vm_calc(struct dsi_data *dsi,
4750 const struct omap_dss_dsi_config *cfg,
4751 struct dsi_clk_calc_ctx *ctx)
4752 {
4753 const struct omap_video_timings *t = cfg->timings;
4754 unsigned long clkin;
4755 unsigned long pll_min;
4756 unsigned long pll_max;
4757 int ndl = dsi->num_lanes_used - 1;
4758 int bitspp = dsi_get_pixel_size(cfg->pixel_format);
4759 unsigned long byteclk_min;
4760
4761 clkin = clk_get_rate(dsi->pll.clkin);
4762
4763 memset(ctx, 0, sizeof(*ctx));
4764 ctx->dsidev = dsi->pdev;
4765 ctx->pll = &dsi->pll;
4766 ctx->config = cfg;
4767
4768 /* these limits should come from the panel driver */
4769 ctx->req_pck_min = t->pixelclock - 1000;
4770 ctx->req_pck_nom = t->pixelclock;
4771 ctx->req_pck_max = t->pixelclock + 1000;
4772
4773 byteclk_min = div64_u64((u64)ctx->req_pck_min * bitspp, ndl * 8);
4774 pll_min = max(cfg->hs_clk_min * 4, byteclk_min * 4 * 4);
4775
4776 if (cfg->trans_mode == OMAP_DSS_DSI_BURST_MODE) {
4777 pll_max = cfg->hs_clk_max * 4;
4778 } else {
4779 unsigned long byteclk_max;
4780 byteclk_max = div64_u64((u64)ctx->req_pck_max * bitspp,
4781 ndl * 8);
4782
4783 pll_max = byteclk_max * 4 * 4;
4784 }
4785
4786 return dss_pll_calc(ctx->pll, clkin,
4787 pll_min, pll_max,
4788 dsi_vm_calc_pll_cb, ctx);
4789 }
4790
dsi_set_config(struct omap_dss_device * dssdev,const struct omap_dss_dsi_config * config)4791 static int dsi_set_config(struct omap_dss_device *dssdev,
4792 const struct omap_dss_dsi_config *config)
4793 {
4794 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4795 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4796 struct dsi_clk_calc_ctx ctx;
4797 bool ok;
4798 int r;
4799
4800 mutex_lock(&dsi->lock);
4801
4802 dsi->pix_fmt = config->pixel_format;
4803 dsi->mode = config->mode;
4804
4805 if (config->mode == OMAP_DSS_DSI_VIDEO_MODE)
4806 ok = dsi_vm_calc(dsi, config, &ctx);
4807 else
4808 ok = dsi_cm_calc(dsi, config, &ctx);
4809
4810 if (!ok) {
4811 DSSERR("failed to find suitable DSI clock settings\n");
4812 r = -EINVAL;
4813 goto err;
4814 }
4815
4816 dsi_pll_calc_dsi_fck(&ctx.dsi_cinfo);
4817
4818 r = dsi_lp_clock_calc(ctx.dsi_cinfo.clkout[HSDIV_DSI],
4819 config->lp_clk_min, config->lp_clk_max, &dsi->user_lp_cinfo);
4820 if (r) {
4821 DSSERR("failed to find suitable DSI LP clock settings\n");
4822 goto err;
4823 }
4824
4825 dsi->user_dsi_cinfo = ctx.dsi_cinfo;
4826 dsi->user_dispc_cinfo = ctx.dispc_cinfo;
4827
4828 dsi->timings = ctx.dispc_vm;
4829 dsi->vm_timings = ctx.dsi_vm;
4830
4831 mutex_unlock(&dsi->lock);
4832
4833 return 0;
4834 err:
4835 mutex_unlock(&dsi->lock);
4836
4837 return r;
4838 }
4839
4840 /*
4841 * Return a hardcoded channel for the DSI output. This should work for
4842 * current use cases, but this can be later expanded to either resolve
4843 * the channel in some more dynamic manner, or get the channel as a user
4844 * parameter.
4845 */
dsi_get_channel(int module_id)4846 static enum omap_channel dsi_get_channel(int module_id)
4847 {
4848 switch (omapdss_get_version()) {
4849 case OMAPDSS_VER_OMAP24xx:
4850 case OMAPDSS_VER_AM43xx:
4851 DSSWARN("DSI not supported\n");
4852 return OMAP_DSS_CHANNEL_LCD;
4853
4854 case OMAPDSS_VER_OMAP34xx_ES1:
4855 case OMAPDSS_VER_OMAP34xx_ES3:
4856 case OMAPDSS_VER_OMAP3630:
4857 case OMAPDSS_VER_AM35xx:
4858 return OMAP_DSS_CHANNEL_LCD;
4859
4860 case OMAPDSS_VER_OMAP4430_ES1:
4861 case OMAPDSS_VER_OMAP4430_ES2:
4862 case OMAPDSS_VER_OMAP4:
4863 switch (module_id) {
4864 case 0:
4865 return OMAP_DSS_CHANNEL_LCD;
4866 case 1:
4867 return OMAP_DSS_CHANNEL_LCD2;
4868 default:
4869 DSSWARN("unsupported module id\n");
4870 return OMAP_DSS_CHANNEL_LCD;
4871 }
4872
4873 case OMAPDSS_VER_OMAP5:
4874 switch (module_id) {
4875 case 0:
4876 return OMAP_DSS_CHANNEL_LCD;
4877 case 1:
4878 return OMAP_DSS_CHANNEL_LCD3;
4879 default:
4880 DSSWARN("unsupported module id\n");
4881 return OMAP_DSS_CHANNEL_LCD;
4882 }
4883
4884 default:
4885 DSSWARN("unsupported DSS version\n");
4886 return OMAP_DSS_CHANNEL_LCD;
4887 }
4888 }
4889
dsi_request_vc(struct omap_dss_device * dssdev,int * channel)4890 static int dsi_request_vc(struct omap_dss_device *dssdev, int *channel)
4891 {
4892 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4893 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4894 int i;
4895
4896 for (i = 0; i < ARRAY_SIZE(dsi->vc); i++) {
4897 if (!dsi->vc[i].dssdev) {
4898 dsi->vc[i].dssdev = dssdev;
4899 *channel = i;
4900 return 0;
4901 }
4902 }
4903
4904 DSSERR("cannot get VC for display %s", dssdev->name);
4905 return -ENOSPC;
4906 }
4907
dsi_set_vc_id(struct omap_dss_device * dssdev,int channel,int vc_id)4908 static int dsi_set_vc_id(struct omap_dss_device *dssdev, int channel, int vc_id)
4909 {
4910 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4911 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4912
4913 if (vc_id < 0 || vc_id > 3) {
4914 DSSERR("VC ID out of range\n");
4915 return -EINVAL;
4916 }
4917
4918 if (channel < 0 || channel > 3) {
4919 DSSERR("Virtual Channel out of range\n");
4920 return -EINVAL;
4921 }
4922
4923 if (dsi->vc[channel].dssdev != dssdev) {
4924 DSSERR("Virtual Channel not allocated to display %s\n",
4925 dssdev->name);
4926 return -EINVAL;
4927 }
4928
4929 dsi->vc[channel].vc_id = vc_id;
4930
4931 return 0;
4932 }
4933
dsi_release_vc(struct omap_dss_device * dssdev,int channel)4934 static void dsi_release_vc(struct omap_dss_device *dssdev, int channel)
4935 {
4936 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4937 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4938
4939 if ((channel >= 0 && channel <= 3) &&
4940 dsi->vc[channel].dssdev == dssdev) {
4941 dsi->vc[channel].dssdev = NULL;
4942 dsi->vc[channel].vc_id = 0;
4943 }
4944 }
4945
4946
dsi_get_clocks(struct platform_device * dsidev)4947 static int dsi_get_clocks(struct platform_device *dsidev)
4948 {
4949 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4950 struct clk *clk;
4951
4952 clk = devm_clk_get(&dsidev->dev, "fck");
4953 if (IS_ERR(clk)) {
4954 DSSERR("can't get fck\n");
4955 return PTR_ERR(clk);
4956 }
4957
4958 dsi->dss_clk = clk;
4959
4960 return 0;
4961 }
4962
dsi_connect(struct omap_dss_device * dssdev,struct omap_dss_device * dst)4963 static int dsi_connect(struct omap_dss_device *dssdev,
4964 struct omap_dss_device *dst)
4965 {
4966 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4967 struct omap_overlay_manager *mgr;
4968 int r;
4969
4970 r = dsi_regulator_init(dsidev);
4971 if (r)
4972 return r;
4973
4974 mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel);
4975 if (!mgr)
4976 return -ENODEV;
4977
4978 r = dss_mgr_connect(mgr, dssdev);
4979 if (r)
4980 return r;
4981
4982 r = omapdss_output_set_device(dssdev, dst);
4983 if (r) {
4984 DSSERR("failed to connect output to new device: %s\n",
4985 dssdev->name);
4986 dss_mgr_disconnect(mgr, dssdev);
4987 return r;
4988 }
4989
4990 return 0;
4991 }
4992
dsi_disconnect(struct omap_dss_device * dssdev,struct omap_dss_device * dst)4993 static void dsi_disconnect(struct omap_dss_device *dssdev,
4994 struct omap_dss_device *dst)
4995 {
4996 WARN_ON(dst != dssdev->dst);
4997
4998 if (dst != dssdev->dst)
4999 return;
5000
5001 omapdss_output_unset_device(dssdev);
5002
5003 if (dssdev->manager)
5004 dss_mgr_disconnect(dssdev->manager, dssdev);
5005 }
5006
5007 static const struct omapdss_dsi_ops dsi_ops = {
5008 .connect = dsi_connect,
5009 .disconnect = dsi_disconnect,
5010
5011 .bus_lock = dsi_bus_lock,
5012 .bus_unlock = dsi_bus_unlock,
5013
5014 .enable = dsi_display_enable,
5015 .disable = dsi_display_disable,
5016
5017 .enable_hs = dsi_vc_enable_hs,
5018
5019 .configure_pins = dsi_configure_pins,
5020 .set_config = dsi_set_config,
5021
5022 .enable_video_output = dsi_enable_video_output,
5023 .disable_video_output = dsi_disable_video_output,
5024
5025 .update = dsi_update,
5026
5027 .enable_te = dsi_enable_te,
5028
5029 .request_vc = dsi_request_vc,
5030 .set_vc_id = dsi_set_vc_id,
5031 .release_vc = dsi_release_vc,
5032
5033 .dcs_write = dsi_vc_dcs_write,
5034 .dcs_write_nosync = dsi_vc_dcs_write_nosync,
5035 .dcs_read = dsi_vc_dcs_read,
5036
5037 .gen_write = dsi_vc_generic_write,
5038 .gen_write_nosync = dsi_vc_generic_write_nosync,
5039 .gen_read = dsi_vc_generic_read,
5040
5041 .bta_sync = dsi_vc_send_bta_sync,
5042
5043 .set_max_rx_packet_size = dsi_vc_set_max_rx_packet_size,
5044 };
5045
dsi_init_output(struct platform_device * dsidev)5046 static void dsi_init_output(struct platform_device *dsidev)
5047 {
5048 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
5049 struct omap_dss_device *out = &dsi->output;
5050
5051 out->dev = &dsidev->dev;
5052 out->id = dsi->module_id == 0 ?
5053 OMAP_DSS_OUTPUT_DSI1 : OMAP_DSS_OUTPUT_DSI2;
5054
5055 out->output_type = OMAP_DISPLAY_TYPE_DSI;
5056 out->name = dsi->module_id == 0 ? "dsi.0" : "dsi.1";
5057 out->dispc_channel = dsi_get_channel(dsi->module_id);
5058 out->ops.dsi = &dsi_ops;
5059 out->owner = THIS_MODULE;
5060
5061 omapdss_register_output(out);
5062 }
5063
dsi_uninit_output(struct platform_device * dsidev)5064 static void dsi_uninit_output(struct platform_device *dsidev)
5065 {
5066 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
5067 struct omap_dss_device *out = &dsi->output;
5068
5069 omapdss_unregister_output(out);
5070 }
5071
dsi_probe_of(struct platform_device * pdev)5072 static int dsi_probe_of(struct platform_device *pdev)
5073 {
5074 struct device_node *node = pdev->dev.of_node;
5075 struct dsi_data *dsi = dsi_get_dsidrv_data(pdev);
5076 struct property *prop;
5077 u32 lane_arr[10];
5078 int len, num_pins;
5079 int r, i;
5080 struct device_node *ep;
5081 struct omap_dsi_pin_config pin_cfg;
5082
5083 ep = of_graph_get_endpoint_by_regs(node, 0, -1);
5084 if (!ep)
5085 return 0;
5086
5087 prop = of_find_property(ep, "lanes", &len);
5088 if (prop == NULL) {
5089 dev_err(&pdev->dev, "failed to find lane data\n");
5090 r = -EINVAL;
5091 goto err;
5092 }
5093
5094 num_pins = len / sizeof(u32);
5095
5096 if (num_pins < 4 || num_pins % 2 != 0 ||
5097 num_pins > dsi->num_lanes_supported * 2) {
5098 dev_err(&pdev->dev, "bad number of lanes\n");
5099 r = -EINVAL;
5100 goto err;
5101 }
5102
5103 r = of_property_read_u32_array(ep, "lanes", lane_arr, num_pins);
5104 if (r) {
5105 dev_err(&pdev->dev, "failed to read lane data\n");
5106 goto err;
5107 }
5108
5109 pin_cfg.num_pins = num_pins;
5110 for (i = 0; i < num_pins; ++i)
5111 pin_cfg.pins[i] = (int)lane_arr[i];
5112
5113 r = dsi_configure_pins(&dsi->output, &pin_cfg);
5114 if (r) {
5115 dev_err(&pdev->dev, "failed to configure pins");
5116 goto err;
5117 }
5118
5119 of_node_put(ep);
5120
5121 return 0;
5122
5123 err:
5124 of_node_put(ep);
5125 return r;
5126 }
5127
5128 static const struct dss_pll_ops dsi_pll_ops = {
5129 .enable = dsi_pll_enable,
5130 .disable = dsi_pll_disable,
5131 .set_config = dss_pll_write_config_type_a,
5132 };
5133
5134 static const struct dss_pll_hw dss_omap3_dsi_pll_hw = {
5135 .n_max = (1 << 7) - 1,
5136 .m_max = (1 << 11) - 1,
5137 .mX_max = (1 << 4) - 1,
5138 .fint_min = 750000,
5139 .fint_max = 2100000,
5140 .clkdco_low = 1000000000,
5141 .clkdco_max = 1800000000,
5142
5143 .n_msb = 7,
5144 .n_lsb = 1,
5145 .m_msb = 18,
5146 .m_lsb = 8,
5147
5148 .mX_msb[0] = 22,
5149 .mX_lsb[0] = 19,
5150 .mX_msb[1] = 26,
5151 .mX_lsb[1] = 23,
5152
5153 .has_stopmode = true,
5154 .has_freqsel = true,
5155 .has_selfreqdco = false,
5156 .has_refsel = false,
5157 };
5158
5159 static const struct dss_pll_hw dss_omap4_dsi_pll_hw = {
5160 .n_max = (1 << 8) - 1,
5161 .m_max = (1 << 12) - 1,
5162 .mX_max = (1 << 5) - 1,
5163 .fint_min = 500000,
5164 .fint_max = 2500000,
5165 .clkdco_low = 1000000000,
5166 .clkdco_max = 1800000000,
5167
5168 .n_msb = 8,
5169 .n_lsb = 1,
5170 .m_msb = 20,
5171 .m_lsb = 9,
5172
5173 .mX_msb[0] = 25,
5174 .mX_lsb[0] = 21,
5175 .mX_msb[1] = 30,
5176 .mX_lsb[1] = 26,
5177
5178 .has_stopmode = true,
5179 .has_freqsel = false,
5180 .has_selfreqdco = false,
5181 .has_refsel = false,
5182 };
5183
5184 static const struct dss_pll_hw dss_omap5_dsi_pll_hw = {
5185 .n_max = (1 << 8) - 1,
5186 .m_max = (1 << 12) - 1,
5187 .mX_max = (1 << 5) - 1,
5188 .fint_min = 150000,
5189 .fint_max = 52000000,
5190 .clkdco_low = 1000000000,
5191 .clkdco_max = 1800000000,
5192
5193 .n_msb = 8,
5194 .n_lsb = 1,
5195 .m_msb = 20,
5196 .m_lsb = 9,
5197
5198 .mX_msb[0] = 25,
5199 .mX_lsb[0] = 21,
5200 .mX_msb[1] = 30,
5201 .mX_lsb[1] = 26,
5202
5203 .has_stopmode = true,
5204 .has_freqsel = false,
5205 .has_selfreqdco = true,
5206 .has_refsel = true,
5207 };
5208
dsi_init_pll_data(struct platform_device * dsidev)5209 static int dsi_init_pll_data(struct platform_device *dsidev)
5210 {
5211 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
5212 struct dss_pll *pll = &dsi->pll;
5213 struct clk *clk;
5214 int r;
5215
5216 clk = devm_clk_get(&dsidev->dev, "sys_clk");
5217 if (IS_ERR(clk)) {
5218 DSSERR("can't get sys_clk\n");
5219 return PTR_ERR(clk);
5220 }
5221
5222 pll->name = dsi->module_id == 0 ? "dsi0" : "dsi1";
5223 pll->id = dsi->module_id == 0 ? DSS_PLL_DSI1 : DSS_PLL_DSI2;
5224 pll->clkin = clk;
5225 pll->base = dsi->pll_base;
5226
5227 switch (omapdss_get_version()) {
5228 case OMAPDSS_VER_OMAP34xx_ES1:
5229 case OMAPDSS_VER_OMAP34xx_ES3:
5230 case OMAPDSS_VER_OMAP3630:
5231 case OMAPDSS_VER_AM35xx:
5232 pll->hw = &dss_omap3_dsi_pll_hw;
5233 break;
5234
5235 case OMAPDSS_VER_OMAP4430_ES1:
5236 case OMAPDSS_VER_OMAP4430_ES2:
5237 case OMAPDSS_VER_OMAP4:
5238 pll->hw = &dss_omap4_dsi_pll_hw;
5239 break;
5240
5241 case OMAPDSS_VER_OMAP5:
5242 pll->hw = &dss_omap5_dsi_pll_hw;
5243 break;
5244
5245 default:
5246 return -ENODEV;
5247 }
5248
5249 pll->ops = &dsi_pll_ops;
5250
5251 r = dss_pll_register(pll);
5252 if (r)
5253 return r;
5254
5255 return 0;
5256 }
5257
5258 /* DSI1 HW IP initialisation */
dsi_bind(struct device * dev,struct device * master,void * data)5259 static int dsi_bind(struct device *dev, struct device *master, void *data)
5260 {
5261 struct platform_device *dsidev = to_platform_device(dev);
5262 u32 rev;
5263 int r, i;
5264 struct dsi_data *dsi;
5265 struct resource *dsi_mem;
5266 struct resource *res;
5267 struct resource temp_res;
5268
5269 dsi = devm_kzalloc(&dsidev->dev, sizeof(*dsi), GFP_KERNEL);
5270 if (!dsi)
5271 return -ENOMEM;
5272
5273 dsi->pdev = dsidev;
5274 platform_set_drvdata(dsidev, dsi);
5275
5276 spin_lock_init(&dsi->irq_lock);
5277 spin_lock_init(&dsi->errors_lock);
5278 dsi->errors = 0;
5279
5280 #ifdef CONFIG_FB_OMAP2_DSS_COLLECT_IRQ_STATS
5281 spin_lock_init(&dsi->irq_stats_lock);
5282 dsi->irq_stats.last_reset = jiffies;
5283 #endif
5284
5285 mutex_init(&dsi->lock);
5286 sema_init(&dsi->bus_lock, 1);
5287
5288 INIT_DEFERRABLE_WORK(&dsi->framedone_timeout_work,
5289 dsi_framedone_timeout_work_callback);
5290
5291 #ifdef DSI_CATCH_MISSING_TE
5292 timer_setup(&dsi->te_timer, dsi_te_timeout, 0);
5293 #endif
5294
5295 res = platform_get_resource_byname(dsidev, IORESOURCE_MEM, "proto");
5296 if (!res) {
5297 res = platform_get_resource(dsidev, IORESOURCE_MEM, 0);
5298 if (!res) {
5299 DSSERR("can't get IORESOURCE_MEM DSI\n");
5300 return -EINVAL;
5301 }
5302
5303 temp_res.start = res->start;
5304 temp_res.end = temp_res.start + DSI_PROTO_SZ - 1;
5305 res = &temp_res;
5306 }
5307
5308 dsi_mem = res;
5309
5310 dsi->proto_base = devm_ioremap(&dsidev->dev, res->start,
5311 resource_size(res));
5312 if (!dsi->proto_base) {
5313 DSSERR("can't ioremap DSI protocol engine\n");
5314 return -ENOMEM;
5315 }
5316
5317 res = platform_get_resource_byname(dsidev, IORESOURCE_MEM, "phy");
5318 if (!res) {
5319 res = platform_get_resource(dsidev, IORESOURCE_MEM, 0);
5320 if (!res) {
5321 DSSERR("can't get IORESOURCE_MEM DSI\n");
5322 return -EINVAL;
5323 }
5324
5325 temp_res.start = res->start + DSI_PHY_OFFSET;
5326 temp_res.end = temp_res.start + DSI_PHY_SZ - 1;
5327 res = &temp_res;
5328 }
5329
5330 dsi->phy_base = devm_ioremap(&dsidev->dev, res->start,
5331 resource_size(res));
5332 if (!dsi->phy_base) {
5333 DSSERR("can't ioremap DSI PHY\n");
5334 return -ENOMEM;
5335 }
5336
5337 res = platform_get_resource_byname(dsidev, IORESOURCE_MEM, "pll");
5338 if (!res) {
5339 res = platform_get_resource(dsidev, IORESOURCE_MEM, 0);
5340 if (!res) {
5341 DSSERR("can't get IORESOURCE_MEM DSI\n");
5342 return -EINVAL;
5343 }
5344
5345 temp_res.start = res->start + DSI_PLL_OFFSET;
5346 temp_res.end = temp_res.start + DSI_PLL_SZ - 1;
5347 res = &temp_res;
5348 }
5349
5350 dsi->pll_base = devm_ioremap(&dsidev->dev, res->start,
5351 resource_size(res));
5352 if (!dsi->pll_base) {
5353 DSSERR("can't ioremap DSI PLL\n");
5354 return -ENOMEM;
5355 }
5356
5357 dsi->irq = platform_get_irq(dsi->pdev, 0);
5358 if (dsi->irq < 0) {
5359 DSSERR("platform_get_irq failed\n");
5360 return -ENODEV;
5361 }
5362
5363 r = devm_request_irq(&dsidev->dev, dsi->irq, omap_dsi_irq_handler,
5364 IRQF_SHARED, dev_name(&dsidev->dev), dsi->pdev);
5365 if (r < 0) {
5366 DSSERR("request_irq failed\n");
5367 return r;
5368 }
5369
5370 if (dsidev->dev.of_node) {
5371 const struct of_device_id *match;
5372 const struct dsi_module_id_data *d;
5373
5374 match = of_match_node(dsi_of_match, dsidev->dev.of_node);
5375 if (!match) {
5376 DSSERR("unsupported DSI module\n");
5377 return -ENODEV;
5378 }
5379
5380 d = match->data;
5381
5382 while (d->address != 0 && d->address != dsi_mem->start)
5383 d++;
5384
5385 if (d->address == 0) {
5386 DSSERR("unsupported DSI module\n");
5387 return -ENODEV;
5388 }
5389
5390 dsi->module_id = d->id;
5391 } else {
5392 dsi->module_id = dsidev->id;
5393 }
5394
5395 /* DSI VCs initialization */
5396 for (i = 0; i < ARRAY_SIZE(dsi->vc); i++) {
5397 dsi->vc[i].source = DSI_VC_SOURCE_L4;
5398 dsi->vc[i].dssdev = NULL;
5399 dsi->vc[i].vc_id = 0;
5400 }
5401
5402 r = dsi_get_clocks(dsidev);
5403 if (r)
5404 return r;
5405
5406 dsi_init_pll_data(dsidev);
5407
5408 pm_runtime_enable(&dsidev->dev);
5409
5410 r = dsi_runtime_get(dsidev);
5411 if (r)
5412 goto err_runtime_get;
5413
5414 rev = dsi_read_reg(dsidev, DSI_REVISION);
5415 dev_dbg(&dsidev->dev, "OMAP DSI rev %d.%d\n",
5416 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
5417
5418 /* DSI on OMAP3 doesn't have register DSI_GNQ, set number
5419 * of data to 3 by default */
5420 if (dss_has_feature(FEAT_DSI_GNQ))
5421 /* NB_DATA_LANES */
5422 dsi->num_lanes_supported = 1 + REG_GET(dsidev, DSI_GNQ, 11, 9);
5423 else
5424 dsi->num_lanes_supported = 3;
5425
5426 dsi->line_buffer_size = dsi_get_line_buf_size(dsidev);
5427
5428 dsi_init_output(dsidev);
5429
5430 if (dsidev->dev.of_node) {
5431 r = dsi_probe_of(dsidev);
5432 if (r) {
5433 DSSERR("Invalid DSI DT data\n");
5434 goto err_probe_of;
5435 }
5436
5437 r = of_platform_populate(dsidev->dev.of_node, NULL, NULL,
5438 &dsidev->dev);
5439 if (r)
5440 DSSERR("Failed to populate DSI child devices: %d\n", r);
5441 }
5442
5443 dsi_runtime_put(dsidev);
5444
5445 if (dsi->module_id == 0)
5446 dss_debugfs_create_file("dsi1_regs", dsi1_dump_regs);
5447 else if (dsi->module_id == 1)
5448 dss_debugfs_create_file("dsi2_regs", dsi2_dump_regs);
5449
5450 #ifdef CONFIG_FB_OMAP2_DSS_COLLECT_IRQ_STATS
5451 if (dsi->module_id == 0)
5452 dss_debugfs_create_file("dsi1_irqs", dsi1_dump_irqs);
5453 else if (dsi->module_id == 1)
5454 dss_debugfs_create_file("dsi2_irqs", dsi2_dump_irqs);
5455 #endif
5456
5457 return 0;
5458
5459 err_probe_of:
5460 dsi_uninit_output(dsidev);
5461 dsi_runtime_put(dsidev);
5462
5463 err_runtime_get:
5464 pm_runtime_disable(&dsidev->dev);
5465 return r;
5466 }
5467
dsi_unbind(struct device * dev,struct device * master,void * data)5468 static void dsi_unbind(struct device *dev, struct device *master, void *data)
5469 {
5470 struct platform_device *dsidev = to_platform_device(dev);
5471 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
5472
5473 of_platform_depopulate(&dsidev->dev);
5474
5475 WARN_ON(dsi->scp_clk_refcount > 0);
5476
5477 dss_pll_unregister(&dsi->pll);
5478
5479 dsi_uninit_output(dsidev);
5480
5481 pm_runtime_disable(&dsidev->dev);
5482
5483 if (dsi->vdds_dsi_reg != NULL && dsi->vdds_dsi_enabled) {
5484 regulator_disable(dsi->vdds_dsi_reg);
5485 dsi->vdds_dsi_enabled = false;
5486 }
5487 }
5488
5489 static const struct component_ops dsi_component_ops = {
5490 .bind = dsi_bind,
5491 .unbind = dsi_unbind,
5492 };
5493
dsi_probe(struct platform_device * pdev)5494 static int dsi_probe(struct platform_device *pdev)
5495 {
5496 return component_add(&pdev->dev, &dsi_component_ops);
5497 }
5498
dsi_remove(struct platform_device * pdev)5499 static void dsi_remove(struct platform_device *pdev)
5500 {
5501 component_del(&pdev->dev, &dsi_component_ops);
5502 }
5503
dsi_runtime_suspend(struct device * dev)5504 static int dsi_runtime_suspend(struct device *dev)
5505 {
5506 struct platform_device *pdev = to_platform_device(dev);
5507 struct dsi_data *dsi = dsi_get_dsidrv_data(pdev);
5508
5509 dsi->is_enabled = false;
5510 /* ensure the irq handler sees the is_enabled value */
5511 smp_wmb();
5512 /* wait for current handler to finish before turning the DSI off */
5513 synchronize_irq(dsi->irq);
5514
5515 dispc_runtime_put();
5516
5517 return 0;
5518 }
5519
dsi_runtime_resume(struct device * dev)5520 static int dsi_runtime_resume(struct device *dev)
5521 {
5522 struct platform_device *pdev = to_platform_device(dev);
5523 struct dsi_data *dsi = dsi_get_dsidrv_data(pdev);
5524 int r;
5525
5526 r = dispc_runtime_get();
5527 if (r)
5528 return r;
5529
5530 dsi->is_enabled = true;
5531 /* ensure the irq handler sees the is_enabled value */
5532 smp_wmb();
5533
5534 return 0;
5535 }
5536
5537 static const struct dev_pm_ops dsi_pm_ops = {
5538 .runtime_suspend = dsi_runtime_suspend,
5539 .runtime_resume = dsi_runtime_resume,
5540 };
5541
5542 static const struct dsi_module_id_data dsi_of_data_omap3[] = {
5543 { .address = 0x4804fc00, .id = 0, },
5544 { },
5545 };
5546
5547 static const struct dsi_module_id_data dsi_of_data_omap4[] = {
5548 { .address = 0x58004000, .id = 0, },
5549 { .address = 0x58005000, .id = 1, },
5550 { },
5551 };
5552
5553 static const struct dsi_module_id_data dsi_of_data_omap5[] = {
5554 { .address = 0x58004000, .id = 0, },
5555 { .address = 0x58009000, .id = 1, },
5556 { },
5557 };
5558
5559 static const struct of_device_id dsi_of_match[] = {
5560 { .compatible = "ti,omap3-dsi", .data = dsi_of_data_omap3, },
5561 { .compatible = "ti,omap4-dsi", .data = dsi_of_data_omap4, },
5562 { .compatible = "ti,omap5-dsi", .data = dsi_of_data_omap5, },
5563 {},
5564 };
5565
5566 static struct platform_driver omap_dsihw_driver = {
5567 .probe = dsi_probe,
5568 .remove = dsi_remove,
5569 .driver = {
5570 .name = "omapdss_dsi",
5571 .pm = &dsi_pm_ops,
5572 .of_match_table = dsi_of_match,
5573 .suppress_bind_attrs = true,
5574 },
5575 };
5576
dsi_init_platform_driver(void)5577 int __init dsi_init_platform_driver(void)
5578 {
5579 return platform_driver_register(&omap_dsihw_driver);
5580 }
5581
dsi_uninit_platform_driver(void)5582 void dsi_uninit_platform_driver(void)
5583 {
5584 platform_driver_unregister(&omap_dsihw_driver);
5585 }
5586