1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2009 Nokia Corporation
4 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
5 *
6 * Some code and ideas taken from drivers/video/omap/ driver
7 * by Imre Deak.
8 */
9
10 #define DSS_SUBSYS_NAME "DSS"
11
12 #include <linux/debugfs.h>
13 #include <linux/dma-mapping.h>
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/io.h>
17 #include <linux/export.h>
18 #include <linux/err.h>
19 #include <linux/delay.h>
20 #include <linux/seq_file.h>
21 #include <linux/clk.h>
22 #include <linux/pinctrl/consumer.h>
23 #include <linux/platform_device.h>
24 #include <linux/pm_runtime.h>
25 #include <linux/property.h>
26 #include <linux/gfp.h>
27 #include <linux/sizes.h>
28 #include <linux/mfd/syscon.h>
29 #include <linux/regmap.h>
30 #include <linux/of.h>
31 #include <linux/of_platform.h>
32 #include <linux/of_graph.h>
33 #include <linux/regulator/consumer.h>
34 #include <linux/suspend.h>
35 #include <linux/component.h>
36 #include <linux/sys_soc.h>
37
38 #include "omapdss.h"
39 #include "dss.h"
40
41 struct dss_reg {
42 u16 idx;
43 };
44
45 #define DSS_REG(idx) ((const struct dss_reg) { idx })
46
47 #define DSS_REVISION DSS_REG(0x0000)
48 #define DSS_SYSCONFIG DSS_REG(0x0010)
49 #define DSS_SYSSTATUS DSS_REG(0x0014)
50 #define DSS_CONTROL DSS_REG(0x0040)
51 #define DSS_SDI_CONTROL DSS_REG(0x0044)
52 #define DSS_PLL_CONTROL DSS_REG(0x0048)
53 #define DSS_SDI_STATUS DSS_REG(0x005C)
54
55 #define REG_GET(dss, idx, start, end) \
56 FLD_GET(dss_read_reg(dss, idx), start, end)
57
58 #define REG_FLD_MOD(dss, idx, val, start, end) \
59 dss_write_reg(dss, idx, \
60 FLD_MOD(dss_read_reg(dss, idx), val, start, end))
61
62 struct dss_ops {
63 int (*dpi_select_source)(struct dss_device *dss, int port,
64 enum omap_channel channel);
65 int (*select_lcd_source)(struct dss_device *dss,
66 enum omap_channel channel,
67 enum dss_clk_source clk_src);
68 };
69
70 struct dss_features {
71 enum dss_model model;
72 u8 fck_div_max;
73 unsigned int fck_freq_max;
74 u8 dss_fck_multiplier;
75 const char *parent_clk_name;
76 const enum omap_display_type *ports;
77 int num_ports;
78 const enum omap_dss_output_id *outputs;
79 const struct dss_ops *ops;
80 struct dss_reg_field dispc_clk_switch;
81 bool has_lcd_clk_src;
82 };
83
84 static const char * const dss_generic_clk_source_names[] = {
85 [DSS_CLK_SRC_FCK] = "FCK",
86 [DSS_CLK_SRC_PLL1_1] = "PLL1:1",
87 [DSS_CLK_SRC_PLL1_2] = "PLL1:2",
88 [DSS_CLK_SRC_PLL1_3] = "PLL1:3",
89 [DSS_CLK_SRC_PLL2_1] = "PLL2:1",
90 [DSS_CLK_SRC_PLL2_2] = "PLL2:2",
91 [DSS_CLK_SRC_PLL2_3] = "PLL2:3",
92 [DSS_CLK_SRC_HDMI_PLL] = "HDMI PLL",
93 };
94
dss_write_reg(struct dss_device * dss,const struct dss_reg idx,u32 val)95 static inline void dss_write_reg(struct dss_device *dss,
96 const struct dss_reg idx, u32 val)
97 {
98 __raw_writel(val, dss->base + idx.idx);
99 }
100
dss_read_reg(struct dss_device * dss,const struct dss_reg idx)101 static inline u32 dss_read_reg(struct dss_device *dss, const struct dss_reg idx)
102 {
103 return __raw_readl(dss->base + idx.idx);
104 }
105
106 #define SR(dss, reg) \
107 dss->ctx[(DSS_##reg).idx / sizeof(u32)] = dss_read_reg(dss, DSS_##reg)
108 #define RR(dss, reg) \
109 dss_write_reg(dss, DSS_##reg, dss->ctx[(DSS_##reg).idx / sizeof(u32)])
110
dss_save_context(struct dss_device * dss)111 static void dss_save_context(struct dss_device *dss)
112 {
113 DSSDBG("dss_save_context\n");
114
115 SR(dss, CONTROL);
116
117 if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) {
118 SR(dss, SDI_CONTROL);
119 SR(dss, PLL_CONTROL);
120 }
121
122 dss->ctx_valid = true;
123
124 DSSDBG("context saved\n");
125 }
126
dss_restore_context(struct dss_device * dss)127 static void dss_restore_context(struct dss_device *dss)
128 {
129 DSSDBG("dss_restore_context\n");
130
131 if (!dss->ctx_valid)
132 return;
133
134 RR(dss, CONTROL);
135
136 if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) {
137 RR(dss, SDI_CONTROL);
138 RR(dss, PLL_CONTROL);
139 }
140
141 DSSDBG("context restored\n");
142 }
143
144 #undef SR
145 #undef RR
146
dss_ctrl_pll_enable(struct dss_pll * pll,bool enable)147 void dss_ctrl_pll_enable(struct dss_pll *pll, bool enable)
148 {
149 unsigned int shift;
150 unsigned int val;
151
152 if (!pll->dss->syscon_pll_ctrl)
153 return;
154
155 val = !enable;
156
157 switch (pll->id) {
158 case DSS_PLL_VIDEO1:
159 shift = 0;
160 break;
161 case DSS_PLL_VIDEO2:
162 shift = 1;
163 break;
164 case DSS_PLL_HDMI:
165 shift = 2;
166 break;
167 default:
168 DSSERR("illegal DSS PLL ID %d\n", pll->id);
169 return;
170 }
171
172 regmap_update_bits(pll->dss->syscon_pll_ctrl,
173 pll->dss->syscon_pll_ctrl_offset,
174 1 << shift, val << shift);
175 }
176
dss_ctrl_pll_set_control_mux(struct dss_device * dss,enum dss_clk_source clk_src,enum omap_channel channel)177 static int dss_ctrl_pll_set_control_mux(struct dss_device *dss,
178 enum dss_clk_source clk_src,
179 enum omap_channel channel)
180 {
181 unsigned int shift, val;
182
183 if (!dss->syscon_pll_ctrl)
184 return -EINVAL;
185
186 switch (channel) {
187 case OMAP_DSS_CHANNEL_LCD:
188 shift = 3;
189
190 switch (clk_src) {
191 case DSS_CLK_SRC_PLL1_1:
192 val = 0; break;
193 case DSS_CLK_SRC_HDMI_PLL:
194 val = 1; break;
195 default:
196 DSSERR("error in PLL mux config for LCD\n");
197 return -EINVAL;
198 }
199
200 break;
201 case OMAP_DSS_CHANNEL_LCD2:
202 shift = 5;
203
204 switch (clk_src) {
205 case DSS_CLK_SRC_PLL1_3:
206 val = 0; break;
207 case DSS_CLK_SRC_PLL2_3:
208 val = 1; break;
209 case DSS_CLK_SRC_HDMI_PLL:
210 val = 2; break;
211 default:
212 DSSERR("error in PLL mux config for LCD2\n");
213 return -EINVAL;
214 }
215
216 break;
217 case OMAP_DSS_CHANNEL_LCD3:
218 shift = 7;
219
220 switch (clk_src) {
221 case DSS_CLK_SRC_PLL2_1:
222 val = 0; break;
223 case DSS_CLK_SRC_PLL1_3:
224 val = 1; break;
225 case DSS_CLK_SRC_HDMI_PLL:
226 val = 2; break;
227 default:
228 DSSERR("error in PLL mux config for LCD3\n");
229 return -EINVAL;
230 }
231
232 break;
233 default:
234 DSSERR("error in PLL mux config\n");
235 return -EINVAL;
236 }
237
238 regmap_update_bits(dss->syscon_pll_ctrl, dss->syscon_pll_ctrl_offset,
239 0x3 << shift, val << shift);
240
241 return 0;
242 }
243
dss_sdi_init(struct dss_device * dss,int datapairs)244 void dss_sdi_init(struct dss_device *dss, int datapairs)
245 {
246 u32 l;
247
248 BUG_ON(datapairs > 3 || datapairs < 1);
249
250 l = dss_read_reg(dss, DSS_SDI_CONTROL);
251 l = FLD_MOD(l, 0xf, 19, 15); /* SDI_PDIV */
252 l = FLD_MOD(l, datapairs-1, 3, 2); /* SDI_PRSEL */
253 l = FLD_MOD(l, 2, 1, 0); /* SDI_BWSEL */
254 dss_write_reg(dss, DSS_SDI_CONTROL, l);
255
256 l = dss_read_reg(dss, DSS_PLL_CONTROL);
257 l = FLD_MOD(l, 0x7, 25, 22); /* SDI_PLL_FREQSEL */
258 l = FLD_MOD(l, 0xb, 16, 11); /* SDI_PLL_REGN */
259 l = FLD_MOD(l, 0xb4, 10, 1); /* SDI_PLL_REGM */
260 dss_write_reg(dss, DSS_PLL_CONTROL, l);
261 }
262
dss_sdi_enable(struct dss_device * dss)263 int dss_sdi_enable(struct dss_device *dss)
264 {
265 unsigned long timeout;
266
267 dispc_pck_free_enable(dss->dispc, 1);
268
269 /* Reset SDI PLL */
270 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 1, 18, 18); /* SDI_PLL_SYSRESET */
271 udelay(1); /* wait 2x PCLK */
272
273 /* Lock SDI PLL */
274 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 1, 28, 28); /* SDI_PLL_GOBIT */
275
276 /* Waiting for PLL lock request to complete */
277 timeout = jiffies + msecs_to_jiffies(500);
278 while (dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 6)) {
279 if (time_after_eq(jiffies, timeout)) {
280 DSSERR("PLL lock request timed out\n");
281 goto err1;
282 }
283 }
284
285 /* Clearing PLL_GO bit */
286 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 28, 28);
287
288 /* Waiting for PLL to lock */
289 timeout = jiffies + msecs_to_jiffies(500);
290 while (!(dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 5))) {
291 if (time_after_eq(jiffies, timeout)) {
292 DSSERR("PLL lock timed out\n");
293 goto err1;
294 }
295 }
296
297 dispc_lcd_enable_signal(dss->dispc, 1);
298
299 /* Waiting for SDI reset to complete */
300 timeout = jiffies + msecs_to_jiffies(500);
301 while (!(dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 2))) {
302 if (time_after_eq(jiffies, timeout)) {
303 DSSERR("SDI reset timed out\n");
304 goto err2;
305 }
306 }
307
308 return 0;
309
310 err2:
311 dispc_lcd_enable_signal(dss->dispc, 0);
312 err1:
313 /* Reset SDI PLL */
314 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
315
316 dispc_pck_free_enable(dss->dispc, 0);
317
318 return -ETIMEDOUT;
319 }
320
dss_sdi_disable(struct dss_device * dss)321 void dss_sdi_disable(struct dss_device *dss)
322 {
323 dispc_lcd_enable_signal(dss->dispc, 0);
324
325 dispc_pck_free_enable(dss->dispc, 0);
326
327 /* Reset SDI PLL */
328 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
329 }
330
dss_get_clk_source_name(enum dss_clk_source clk_src)331 const char *dss_get_clk_source_name(enum dss_clk_source clk_src)
332 {
333 return dss_generic_clk_source_names[clk_src];
334 }
335
dss_dump_clocks(struct dss_device * dss,struct seq_file * s)336 static void dss_dump_clocks(struct dss_device *dss, struct seq_file *s)
337 {
338 const char *fclk_name;
339 unsigned long fclk_rate;
340
341 if (dss_runtime_get(dss))
342 return;
343
344 seq_printf(s, "- DSS -\n");
345
346 fclk_name = dss_get_clk_source_name(DSS_CLK_SRC_FCK);
347 fclk_rate = clk_get_rate(dss->dss_clk);
348
349 seq_printf(s, "%s = %lu\n",
350 fclk_name,
351 fclk_rate);
352
353 dss_runtime_put(dss);
354 }
355
dss_dump_regs(struct seq_file * s,void * p)356 static int dss_dump_regs(struct seq_file *s, void *p)
357 {
358 struct dss_device *dss = s->private;
359
360 #define DUMPREG(dss, r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(dss, r))
361
362 if (dss_runtime_get(dss))
363 return 0;
364
365 DUMPREG(dss, DSS_REVISION);
366 DUMPREG(dss, DSS_SYSCONFIG);
367 DUMPREG(dss, DSS_SYSSTATUS);
368 DUMPREG(dss, DSS_CONTROL);
369
370 if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) {
371 DUMPREG(dss, DSS_SDI_CONTROL);
372 DUMPREG(dss, DSS_PLL_CONTROL);
373 DUMPREG(dss, DSS_SDI_STATUS);
374 }
375
376 dss_runtime_put(dss);
377 #undef DUMPREG
378 return 0;
379 }
380
dss_debug_dump_clocks(struct seq_file * s,void * p)381 static int dss_debug_dump_clocks(struct seq_file *s, void *p)
382 {
383 struct dss_device *dss = s->private;
384
385 dss_dump_clocks(dss, s);
386 dispc_dump_clocks(dss->dispc, s);
387 return 0;
388 }
389
dss_get_channel_index(enum omap_channel channel)390 static int dss_get_channel_index(enum omap_channel channel)
391 {
392 switch (channel) {
393 case OMAP_DSS_CHANNEL_LCD:
394 return 0;
395 case OMAP_DSS_CHANNEL_LCD2:
396 return 1;
397 case OMAP_DSS_CHANNEL_LCD3:
398 return 2;
399 default:
400 WARN_ON(1);
401 return 0;
402 }
403 }
404
dss_select_dispc_clk_source(struct dss_device * dss,enum dss_clk_source clk_src)405 static void dss_select_dispc_clk_source(struct dss_device *dss,
406 enum dss_clk_source clk_src)
407 {
408 int b;
409
410 /*
411 * We always use PRCM clock as the DISPC func clock, except on DSS3,
412 * where we don't have separate DISPC and LCD clock sources.
413 */
414 if (WARN_ON(dss->feat->has_lcd_clk_src && clk_src != DSS_CLK_SRC_FCK))
415 return;
416
417 switch (clk_src) {
418 case DSS_CLK_SRC_FCK:
419 b = 0;
420 break;
421 case DSS_CLK_SRC_PLL1_1:
422 b = 1;
423 break;
424 case DSS_CLK_SRC_PLL2_1:
425 b = 2;
426 break;
427 default:
428 BUG();
429 return;
430 }
431
432 REG_FLD_MOD(dss, DSS_CONTROL, b, /* DISPC_CLK_SWITCH */
433 dss->feat->dispc_clk_switch.start,
434 dss->feat->dispc_clk_switch.end);
435
436 dss->dispc_clk_source = clk_src;
437 }
438
dss_select_dsi_clk_source(struct dss_device * dss,int dsi_module,enum dss_clk_source clk_src)439 void dss_select_dsi_clk_source(struct dss_device *dss, int dsi_module,
440 enum dss_clk_source clk_src)
441 {
442 int b, pos;
443
444 switch (clk_src) {
445 case DSS_CLK_SRC_FCK:
446 b = 0;
447 break;
448 case DSS_CLK_SRC_PLL1_2:
449 BUG_ON(dsi_module != 0);
450 b = 1;
451 break;
452 case DSS_CLK_SRC_PLL2_2:
453 BUG_ON(dsi_module != 1);
454 b = 1;
455 break;
456 default:
457 BUG();
458 return;
459 }
460
461 pos = dsi_module == 0 ? 1 : 10;
462 REG_FLD_MOD(dss, DSS_CONTROL, b, pos, pos); /* DSIx_CLK_SWITCH */
463
464 dss->dsi_clk_source[dsi_module] = clk_src;
465 }
466
dss_lcd_clk_mux_dra7(struct dss_device * dss,enum omap_channel channel,enum dss_clk_source clk_src)467 static int dss_lcd_clk_mux_dra7(struct dss_device *dss,
468 enum omap_channel channel,
469 enum dss_clk_source clk_src)
470 {
471 const u8 ctrl_bits[] = {
472 [OMAP_DSS_CHANNEL_LCD] = 0,
473 [OMAP_DSS_CHANNEL_LCD2] = 12,
474 [OMAP_DSS_CHANNEL_LCD3] = 19,
475 };
476
477 u8 ctrl_bit = ctrl_bits[channel];
478 int r;
479
480 if (clk_src == DSS_CLK_SRC_FCK) {
481 /* LCDx_CLK_SWITCH */
482 REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
483 return -EINVAL;
484 }
485
486 r = dss_ctrl_pll_set_control_mux(dss, clk_src, channel);
487 if (r)
488 return r;
489
490 REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
491
492 return 0;
493 }
494
dss_lcd_clk_mux_omap5(struct dss_device * dss,enum omap_channel channel,enum dss_clk_source clk_src)495 static int dss_lcd_clk_mux_omap5(struct dss_device *dss,
496 enum omap_channel channel,
497 enum dss_clk_source clk_src)
498 {
499 const u8 ctrl_bits[] = {
500 [OMAP_DSS_CHANNEL_LCD] = 0,
501 [OMAP_DSS_CHANNEL_LCD2] = 12,
502 [OMAP_DSS_CHANNEL_LCD3] = 19,
503 };
504 const enum dss_clk_source allowed_plls[] = {
505 [OMAP_DSS_CHANNEL_LCD] = DSS_CLK_SRC_PLL1_1,
506 [OMAP_DSS_CHANNEL_LCD2] = DSS_CLK_SRC_FCK,
507 [OMAP_DSS_CHANNEL_LCD3] = DSS_CLK_SRC_PLL2_1,
508 };
509
510 u8 ctrl_bit = ctrl_bits[channel];
511
512 if (clk_src == DSS_CLK_SRC_FCK) {
513 /* LCDx_CLK_SWITCH */
514 REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
515 return -EINVAL;
516 }
517
518 if (WARN_ON(allowed_plls[channel] != clk_src))
519 return -EINVAL;
520
521 REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
522
523 return 0;
524 }
525
dss_lcd_clk_mux_omap4(struct dss_device * dss,enum omap_channel channel,enum dss_clk_source clk_src)526 static int dss_lcd_clk_mux_omap4(struct dss_device *dss,
527 enum omap_channel channel,
528 enum dss_clk_source clk_src)
529 {
530 const u8 ctrl_bits[] = {
531 [OMAP_DSS_CHANNEL_LCD] = 0,
532 [OMAP_DSS_CHANNEL_LCD2] = 12,
533 };
534 const enum dss_clk_source allowed_plls[] = {
535 [OMAP_DSS_CHANNEL_LCD] = DSS_CLK_SRC_PLL1_1,
536 [OMAP_DSS_CHANNEL_LCD2] = DSS_CLK_SRC_PLL2_1,
537 };
538
539 u8 ctrl_bit = ctrl_bits[channel];
540
541 if (clk_src == DSS_CLK_SRC_FCK) {
542 /* LCDx_CLK_SWITCH */
543 REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
544 return 0;
545 }
546
547 if (WARN_ON(allowed_plls[channel] != clk_src))
548 return -EINVAL;
549
550 REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
551
552 return 0;
553 }
554
dss_select_lcd_clk_source(struct dss_device * dss,enum omap_channel channel,enum dss_clk_source clk_src)555 void dss_select_lcd_clk_source(struct dss_device *dss,
556 enum omap_channel channel,
557 enum dss_clk_source clk_src)
558 {
559 int idx = dss_get_channel_index(channel);
560 int r;
561
562 if (!dss->feat->has_lcd_clk_src) {
563 dss_select_dispc_clk_source(dss, clk_src);
564 dss->lcd_clk_source[idx] = clk_src;
565 return;
566 }
567
568 r = dss->feat->ops->select_lcd_source(dss, channel, clk_src);
569 if (r)
570 return;
571
572 dss->lcd_clk_source[idx] = clk_src;
573 }
574
dss_get_dispc_clk_source(struct dss_device * dss)575 enum dss_clk_source dss_get_dispc_clk_source(struct dss_device *dss)
576 {
577 return dss->dispc_clk_source;
578 }
579
dss_get_dsi_clk_source(struct dss_device * dss,int dsi_module)580 enum dss_clk_source dss_get_dsi_clk_source(struct dss_device *dss,
581 int dsi_module)
582 {
583 return dss->dsi_clk_source[dsi_module];
584 }
585
dss_get_lcd_clk_source(struct dss_device * dss,enum omap_channel channel)586 enum dss_clk_source dss_get_lcd_clk_source(struct dss_device *dss,
587 enum omap_channel channel)
588 {
589 if (dss->feat->has_lcd_clk_src) {
590 int idx = dss_get_channel_index(channel);
591 return dss->lcd_clk_source[idx];
592 } else {
593 /* LCD_CLK source is the same as DISPC_FCLK source for
594 * OMAP2 and OMAP3 */
595 return dss->dispc_clk_source;
596 }
597 }
598
dss_div_calc(struct dss_device * dss,unsigned long pck,unsigned long fck_min,dss_div_calc_func func,void * data)599 bool dss_div_calc(struct dss_device *dss, unsigned long pck,
600 unsigned long fck_min, dss_div_calc_func func, void *data)
601 {
602 int fckd, fckd_start, fckd_stop;
603 unsigned long fck;
604 unsigned long fck_hw_max;
605 unsigned long fckd_hw_max;
606 unsigned long prate;
607 unsigned int m;
608
609 fck_hw_max = dss->feat->fck_freq_max;
610
611 if (dss->parent_clk == NULL) {
612 unsigned int pckd;
613
614 pckd = fck_hw_max / pck;
615
616 fck = pck * pckd;
617
618 fck = clk_round_rate(dss->dss_clk, fck);
619
620 return func(fck, data);
621 }
622
623 fckd_hw_max = dss->feat->fck_div_max;
624
625 m = dss->feat->dss_fck_multiplier;
626 prate = clk_get_rate(dss->parent_clk);
627
628 fck_min = fck_min ? fck_min : 1;
629
630 fckd_start = min(prate * m / fck_min, fckd_hw_max);
631 fckd_stop = max(DIV_ROUND_UP(prate * m, fck_hw_max), 1ul);
632
633 for (fckd = fckd_start; fckd >= fckd_stop; --fckd) {
634 fck = DIV_ROUND_UP(prate, fckd) * m;
635
636 if (func(fck, data))
637 return true;
638 }
639
640 return false;
641 }
642
dss_set_fck_rate(struct dss_device * dss,unsigned long rate)643 int dss_set_fck_rate(struct dss_device *dss, unsigned long rate)
644 {
645 int r;
646
647 DSSDBG("set fck to %lu\n", rate);
648
649 r = clk_set_rate(dss->dss_clk, rate);
650 if (r)
651 return r;
652
653 dss->dss_clk_rate = clk_get_rate(dss->dss_clk);
654
655 WARN_ONCE(dss->dss_clk_rate != rate, "clk rate mismatch: %lu != %lu",
656 dss->dss_clk_rate, rate);
657
658 return 0;
659 }
660
dss_get_dispc_clk_rate(struct dss_device * dss)661 unsigned long dss_get_dispc_clk_rate(struct dss_device *dss)
662 {
663 return dss->dss_clk_rate;
664 }
665
dss_get_max_fck_rate(struct dss_device * dss)666 unsigned long dss_get_max_fck_rate(struct dss_device *dss)
667 {
668 return dss->feat->fck_freq_max;
669 }
670
dss_setup_default_clock(struct dss_device * dss)671 static int dss_setup_default_clock(struct dss_device *dss)
672 {
673 unsigned long max_dss_fck, prate;
674 unsigned long fck;
675 unsigned int fck_div;
676 int r;
677
678 max_dss_fck = dss->feat->fck_freq_max;
679
680 if (dss->parent_clk == NULL) {
681 fck = clk_round_rate(dss->dss_clk, max_dss_fck);
682 } else {
683 prate = clk_get_rate(dss->parent_clk);
684
685 fck_div = DIV_ROUND_UP(prate * dss->feat->dss_fck_multiplier,
686 max_dss_fck);
687 fck = DIV_ROUND_UP(prate, fck_div)
688 * dss->feat->dss_fck_multiplier;
689 }
690
691 r = dss_set_fck_rate(dss, fck);
692 if (r)
693 return r;
694
695 return 0;
696 }
697
dss_set_venc_output(struct dss_device * dss,enum omap_dss_venc_type type)698 void dss_set_venc_output(struct dss_device *dss, enum omap_dss_venc_type type)
699 {
700 int l = 0;
701
702 if (type == OMAP_DSS_VENC_TYPE_COMPOSITE)
703 l = 0;
704 else if (type == OMAP_DSS_VENC_TYPE_SVIDEO)
705 l = 1;
706 else
707 BUG();
708
709 /* venc out selection. 0 = comp, 1 = svideo */
710 REG_FLD_MOD(dss, DSS_CONTROL, l, 6, 6);
711 }
712
dss_set_dac_pwrdn_bgz(struct dss_device * dss,bool enable)713 void dss_set_dac_pwrdn_bgz(struct dss_device *dss, bool enable)
714 {
715 /* DAC Power-Down Control */
716 REG_FLD_MOD(dss, DSS_CONTROL, enable, 5, 5);
717 }
718
dss_select_hdmi_venc_clk_source(struct dss_device * dss,enum dss_hdmi_venc_clk_source_select src)719 void dss_select_hdmi_venc_clk_source(struct dss_device *dss,
720 enum dss_hdmi_venc_clk_source_select src)
721 {
722 enum omap_dss_output_id outputs;
723
724 outputs = dss->feat->outputs[OMAP_DSS_CHANNEL_DIGIT];
725
726 /* Complain about invalid selections */
727 WARN_ON((src == DSS_VENC_TV_CLK) && !(outputs & OMAP_DSS_OUTPUT_VENC));
728 WARN_ON((src == DSS_HDMI_M_PCLK) && !(outputs & OMAP_DSS_OUTPUT_HDMI));
729
730 /* Select only if we have options */
731 if ((outputs & OMAP_DSS_OUTPUT_VENC) &&
732 (outputs & OMAP_DSS_OUTPUT_HDMI))
733 /* VENC_HDMI_SWITCH */
734 REG_FLD_MOD(dss, DSS_CONTROL, src, 15, 15);
735 }
736
dss_dpi_select_source_omap2_omap3(struct dss_device * dss,int port,enum omap_channel channel)737 static int dss_dpi_select_source_omap2_omap3(struct dss_device *dss, int port,
738 enum omap_channel channel)
739 {
740 if (channel != OMAP_DSS_CHANNEL_LCD)
741 return -EINVAL;
742
743 return 0;
744 }
745
dss_dpi_select_source_omap4(struct dss_device * dss,int port,enum omap_channel channel)746 static int dss_dpi_select_source_omap4(struct dss_device *dss, int port,
747 enum omap_channel channel)
748 {
749 int val;
750
751 switch (channel) {
752 case OMAP_DSS_CHANNEL_LCD2:
753 val = 0;
754 break;
755 case OMAP_DSS_CHANNEL_DIGIT:
756 val = 1;
757 break;
758 default:
759 return -EINVAL;
760 }
761
762 REG_FLD_MOD(dss, DSS_CONTROL, val, 17, 17);
763
764 return 0;
765 }
766
dss_dpi_select_source_omap5(struct dss_device * dss,int port,enum omap_channel channel)767 static int dss_dpi_select_source_omap5(struct dss_device *dss, int port,
768 enum omap_channel channel)
769 {
770 int val;
771
772 switch (channel) {
773 case OMAP_DSS_CHANNEL_LCD:
774 val = 1;
775 break;
776 case OMAP_DSS_CHANNEL_LCD2:
777 val = 2;
778 break;
779 case OMAP_DSS_CHANNEL_LCD3:
780 val = 3;
781 break;
782 case OMAP_DSS_CHANNEL_DIGIT:
783 val = 0;
784 break;
785 default:
786 return -EINVAL;
787 }
788
789 REG_FLD_MOD(dss, DSS_CONTROL, val, 17, 16);
790
791 return 0;
792 }
793
dss_dpi_select_source_dra7xx(struct dss_device * dss,int port,enum omap_channel channel)794 static int dss_dpi_select_source_dra7xx(struct dss_device *dss, int port,
795 enum omap_channel channel)
796 {
797 switch (port) {
798 case 0:
799 return dss_dpi_select_source_omap5(dss, port, channel);
800 case 1:
801 if (channel != OMAP_DSS_CHANNEL_LCD2)
802 return -EINVAL;
803 break;
804 case 2:
805 if (channel != OMAP_DSS_CHANNEL_LCD3)
806 return -EINVAL;
807 break;
808 default:
809 return -EINVAL;
810 }
811
812 return 0;
813 }
814
dss_dpi_select_source(struct dss_device * dss,int port,enum omap_channel channel)815 int dss_dpi_select_source(struct dss_device *dss, int port,
816 enum omap_channel channel)
817 {
818 return dss->feat->ops->dpi_select_source(dss, port, channel);
819 }
820
dss_get_clocks(struct dss_device * dss)821 static int dss_get_clocks(struct dss_device *dss)
822 {
823 struct clk *clk;
824
825 clk = devm_clk_get(&dss->pdev->dev, "fck");
826 if (IS_ERR(clk)) {
827 DSSERR("can't get clock fck\n");
828 return PTR_ERR(clk);
829 }
830
831 dss->dss_clk = clk;
832
833 if (dss->feat->parent_clk_name) {
834 clk = clk_get(NULL, dss->feat->parent_clk_name);
835 if (IS_ERR(clk)) {
836 DSSERR("Failed to get %s\n",
837 dss->feat->parent_clk_name);
838 return PTR_ERR(clk);
839 }
840 } else {
841 clk = NULL;
842 }
843
844 dss->parent_clk = clk;
845
846 return 0;
847 }
848
dss_put_clocks(struct dss_device * dss)849 static void dss_put_clocks(struct dss_device *dss)
850 {
851 if (dss->parent_clk)
852 clk_put(dss->parent_clk);
853 }
854
dss_runtime_get(struct dss_device * dss)855 int dss_runtime_get(struct dss_device *dss)
856 {
857 int r;
858
859 DSSDBG("dss_runtime_get\n");
860
861 r = pm_runtime_get_sync(&dss->pdev->dev);
862 if (WARN_ON(r < 0)) {
863 pm_runtime_put_noidle(&dss->pdev->dev);
864 return r;
865 }
866 return 0;
867 }
868
dss_runtime_put(struct dss_device * dss)869 void dss_runtime_put(struct dss_device *dss)
870 {
871 int r;
872
873 DSSDBG("dss_runtime_put\n");
874
875 r = pm_runtime_put_sync(&dss->pdev->dev);
876 WARN_ON(r < 0 && r != -ENOSYS && r != -EBUSY);
877 }
878
dss_get_device(struct device * dev)879 struct dss_device *dss_get_device(struct device *dev)
880 {
881 return dev_get_drvdata(dev);
882 }
883
884 /* DEBUGFS */
885 #if defined(CONFIG_OMAP2_DSS_DEBUGFS)
dss_initialize_debugfs(struct dss_device * dss)886 static int dss_initialize_debugfs(struct dss_device *dss)
887 {
888 struct dentry *dir;
889
890 dir = debugfs_create_dir("omapdss", NULL);
891 if (IS_ERR(dir))
892 return PTR_ERR(dir);
893
894 dss->debugfs.root = dir;
895
896 return 0;
897 }
898
dss_uninitialize_debugfs(struct dss_device * dss)899 static void dss_uninitialize_debugfs(struct dss_device *dss)
900 {
901 debugfs_remove_recursive(dss->debugfs.root);
902 }
903
904 struct dss_debugfs_entry {
905 struct dentry *dentry;
906 int (*show_fn)(struct seq_file *s, void *data);
907 void *data;
908 };
909
dss_debug_open(struct inode * inode,struct file * file)910 static int dss_debug_open(struct inode *inode, struct file *file)
911 {
912 struct dss_debugfs_entry *entry = inode->i_private;
913
914 return single_open(file, entry->show_fn, entry->data);
915 }
916
917 static const struct file_operations dss_debug_fops = {
918 .open = dss_debug_open,
919 .read = seq_read,
920 .llseek = seq_lseek,
921 .release = single_release,
922 };
923
924 struct dss_debugfs_entry *
dss_debugfs_create_file(struct dss_device * dss,const char * name,int (* show_fn)(struct seq_file * s,void * data),void * data)925 dss_debugfs_create_file(struct dss_device *dss, const char *name,
926 int (*show_fn)(struct seq_file *s, void *data),
927 void *data)
928 {
929 struct dss_debugfs_entry *entry;
930
931 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
932 if (!entry)
933 return ERR_PTR(-ENOMEM);
934
935 entry->show_fn = show_fn;
936 entry->data = data;
937 entry->dentry = debugfs_create_file(name, 0444, dss->debugfs.root,
938 entry, &dss_debug_fops);
939
940 return entry;
941 }
942
dss_debugfs_remove_file(struct dss_debugfs_entry * entry)943 void dss_debugfs_remove_file(struct dss_debugfs_entry *entry)
944 {
945 if (IS_ERR_OR_NULL(entry))
946 return;
947
948 debugfs_remove(entry->dentry);
949 kfree(entry);
950 }
951
952 #else /* CONFIG_OMAP2_DSS_DEBUGFS */
dss_initialize_debugfs(struct dss_device * dss)953 static inline int dss_initialize_debugfs(struct dss_device *dss)
954 {
955 return 0;
956 }
dss_uninitialize_debugfs(struct dss_device * dss)957 static inline void dss_uninitialize_debugfs(struct dss_device *dss)
958 {
959 }
960 #endif /* CONFIG_OMAP2_DSS_DEBUGFS */
961
962 static const struct dss_ops dss_ops_omap2_omap3 = {
963 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
964 };
965
966 static const struct dss_ops dss_ops_omap4 = {
967 .dpi_select_source = &dss_dpi_select_source_omap4,
968 .select_lcd_source = &dss_lcd_clk_mux_omap4,
969 };
970
971 static const struct dss_ops dss_ops_omap5 = {
972 .dpi_select_source = &dss_dpi_select_source_omap5,
973 .select_lcd_source = &dss_lcd_clk_mux_omap5,
974 };
975
976 static const struct dss_ops dss_ops_dra7 = {
977 .dpi_select_source = &dss_dpi_select_source_dra7xx,
978 .select_lcd_source = &dss_lcd_clk_mux_dra7,
979 };
980
981 static const enum omap_display_type omap2plus_ports[] = {
982 OMAP_DISPLAY_TYPE_DPI,
983 };
984
985 static const enum omap_display_type omap34xx_ports[] = {
986 OMAP_DISPLAY_TYPE_DPI,
987 OMAP_DISPLAY_TYPE_SDI,
988 };
989
990 static const enum omap_display_type dra7xx_ports[] = {
991 OMAP_DISPLAY_TYPE_DPI,
992 OMAP_DISPLAY_TYPE_DPI,
993 OMAP_DISPLAY_TYPE_DPI,
994 };
995
996 static const enum omap_dss_output_id omap2_dss_supported_outputs[] = {
997 /* OMAP_DSS_CHANNEL_LCD */
998 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI,
999
1000 /* OMAP_DSS_CHANNEL_DIGIT */
1001 OMAP_DSS_OUTPUT_VENC,
1002 };
1003
1004 static const enum omap_dss_output_id omap3430_dss_supported_outputs[] = {
1005 /* OMAP_DSS_CHANNEL_LCD */
1006 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1007 OMAP_DSS_OUTPUT_SDI | OMAP_DSS_OUTPUT_DSI1,
1008
1009 /* OMAP_DSS_CHANNEL_DIGIT */
1010 OMAP_DSS_OUTPUT_VENC,
1011 };
1012
1013 static const enum omap_dss_output_id omap3630_dss_supported_outputs[] = {
1014 /* OMAP_DSS_CHANNEL_LCD */
1015 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1016 OMAP_DSS_OUTPUT_DSI1,
1017
1018 /* OMAP_DSS_CHANNEL_DIGIT */
1019 OMAP_DSS_OUTPUT_VENC,
1020 };
1021
1022 static const enum omap_dss_output_id am43xx_dss_supported_outputs[] = {
1023 /* OMAP_DSS_CHANNEL_LCD */
1024 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI,
1025 };
1026
1027 static const enum omap_dss_output_id omap4_dss_supported_outputs[] = {
1028 /* OMAP_DSS_CHANNEL_LCD */
1029 OMAP_DSS_OUTPUT_DBI | OMAP_DSS_OUTPUT_DSI1,
1030
1031 /* OMAP_DSS_CHANNEL_DIGIT */
1032 OMAP_DSS_OUTPUT_VENC | OMAP_DSS_OUTPUT_HDMI,
1033
1034 /* OMAP_DSS_CHANNEL_LCD2 */
1035 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1036 OMAP_DSS_OUTPUT_DSI2,
1037 };
1038
1039 static const enum omap_dss_output_id omap5_dss_supported_outputs[] = {
1040 /* OMAP_DSS_CHANNEL_LCD */
1041 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1042 OMAP_DSS_OUTPUT_DSI1 | OMAP_DSS_OUTPUT_DSI2,
1043
1044 /* OMAP_DSS_CHANNEL_DIGIT */
1045 OMAP_DSS_OUTPUT_HDMI,
1046
1047 /* OMAP_DSS_CHANNEL_LCD2 */
1048 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1049 OMAP_DSS_OUTPUT_DSI1,
1050
1051 /* OMAP_DSS_CHANNEL_LCD3 */
1052 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1053 OMAP_DSS_OUTPUT_DSI2,
1054 };
1055
1056 static const struct dss_features omap24xx_dss_feats = {
1057 .model = DSS_MODEL_OMAP2,
1058 /*
1059 * fck div max is really 16, but the divider range has gaps. The range
1060 * from 1 to 6 has no gaps, so let's use that as a max.
1061 */
1062 .fck_div_max = 6,
1063 .fck_freq_max = 133000000,
1064 .dss_fck_multiplier = 2,
1065 .parent_clk_name = "core_ck",
1066 .ports = omap2plus_ports,
1067 .num_ports = ARRAY_SIZE(omap2plus_ports),
1068 .outputs = omap2_dss_supported_outputs,
1069 .ops = &dss_ops_omap2_omap3,
1070 .dispc_clk_switch = { 0, 0 },
1071 .has_lcd_clk_src = false,
1072 };
1073
1074 static const struct dss_features omap34xx_dss_feats = {
1075 .model = DSS_MODEL_OMAP3,
1076 .fck_div_max = 16,
1077 .fck_freq_max = 173000000,
1078 .dss_fck_multiplier = 2,
1079 .parent_clk_name = "dpll4_ck",
1080 .ports = omap34xx_ports,
1081 .outputs = omap3430_dss_supported_outputs,
1082 .num_ports = ARRAY_SIZE(omap34xx_ports),
1083 .ops = &dss_ops_omap2_omap3,
1084 .dispc_clk_switch = { 0, 0 },
1085 .has_lcd_clk_src = false,
1086 };
1087
1088 static const struct dss_features omap3630_dss_feats = {
1089 .model = DSS_MODEL_OMAP3,
1090 .fck_div_max = 31,
1091 .fck_freq_max = 173000000,
1092 .dss_fck_multiplier = 1,
1093 .parent_clk_name = "dpll4_ck",
1094 .ports = omap2plus_ports,
1095 .num_ports = ARRAY_SIZE(omap2plus_ports),
1096 .outputs = omap3630_dss_supported_outputs,
1097 .ops = &dss_ops_omap2_omap3,
1098 .dispc_clk_switch = { 0, 0 },
1099 .has_lcd_clk_src = false,
1100 };
1101
1102 static const struct dss_features omap44xx_dss_feats = {
1103 .model = DSS_MODEL_OMAP4,
1104 .fck_div_max = 32,
1105 .fck_freq_max = 186000000,
1106 .dss_fck_multiplier = 1,
1107 .parent_clk_name = "dpll_per_x2_ck",
1108 .ports = omap2plus_ports,
1109 .num_ports = ARRAY_SIZE(omap2plus_ports),
1110 .outputs = omap4_dss_supported_outputs,
1111 .ops = &dss_ops_omap4,
1112 .dispc_clk_switch = { 9, 8 },
1113 .has_lcd_clk_src = true,
1114 };
1115
1116 static const struct dss_features omap54xx_dss_feats = {
1117 .model = DSS_MODEL_OMAP5,
1118 .fck_div_max = 64,
1119 .fck_freq_max = 209250000,
1120 .dss_fck_multiplier = 1,
1121 .parent_clk_name = "dpll_per_x2_ck",
1122 .ports = omap2plus_ports,
1123 .num_ports = ARRAY_SIZE(omap2plus_ports),
1124 .outputs = omap5_dss_supported_outputs,
1125 .ops = &dss_ops_omap5,
1126 .dispc_clk_switch = { 9, 7 },
1127 .has_lcd_clk_src = true,
1128 };
1129
1130 static const struct dss_features am43xx_dss_feats = {
1131 .model = DSS_MODEL_OMAP3,
1132 .fck_div_max = 0,
1133 .fck_freq_max = 200000000,
1134 .dss_fck_multiplier = 0,
1135 .parent_clk_name = NULL,
1136 .ports = omap2plus_ports,
1137 .num_ports = ARRAY_SIZE(omap2plus_ports),
1138 .outputs = am43xx_dss_supported_outputs,
1139 .ops = &dss_ops_omap2_omap3,
1140 .dispc_clk_switch = { 0, 0 },
1141 .has_lcd_clk_src = true,
1142 };
1143
1144 static const struct dss_features dra7xx_dss_feats = {
1145 .model = DSS_MODEL_DRA7,
1146 .fck_div_max = 64,
1147 .fck_freq_max = 209250000,
1148 .dss_fck_multiplier = 1,
1149 .parent_clk_name = "dpll_per_x2_ck",
1150 .ports = dra7xx_ports,
1151 .num_ports = ARRAY_SIZE(dra7xx_ports),
1152 .outputs = omap5_dss_supported_outputs,
1153 .ops = &dss_ops_dra7,
1154 .dispc_clk_switch = { 9, 7 },
1155 .has_lcd_clk_src = true,
1156 };
1157
__dss_uninit_ports(struct dss_device * dss,unsigned int num_ports)1158 static void __dss_uninit_ports(struct dss_device *dss, unsigned int num_ports)
1159 {
1160 struct platform_device *pdev = dss->pdev;
1161 struct device_node *parent = pdev->dev.of_node;
1162 struct device_node *port;
1163 unsigned int i;
1164
1165 for (i = 0; i < num_ports; i++) {
1166 port = of_graph_get_port_by_id(parent, i);
1167 if (!port)
1168 continue;
1169
1170 switch (dss->feat->ports[i]) {
1171 case OMAP_DISPLAY_TYPE_DPI:
1172 dpi_uninit_port(port);
1173 break;
1174 case OMAP_DISPLAY_TYPE_SDI:
1175 sdi_uninit_port(port);
1176 break;
1177 default:
1178 break;
1179 }
1180 of_node_put(port);
1181 }
1182 }
1183
dss_init_ports(struct dss_device * dss)1184 static int dss_init_ports(struct dss_device *dss)
1185 {
1186 struct platform_device *pdev = dss->pdev;
1187 struct device_node *parent = pdev->dev.of_node;
1188 struct device_node *port;
1189 unsigned int i;
1190 int r;
1191
1192 for (i = 0; i < dss->feat->num_ports; i++) {
1193 port = of_graph_get_port_by_id(parent, i);
1194 if (!port)
1195 continue;
1196
1197 switch (dss->feat->ports[i]) {
1198 case OMAP_DISPLAY_TYPE_DPI:
1199 r = dpi_init_port(dss, pdev, port, dss->feat->model);
1200 if (r)
1201 goto error;
1202 break;
1203
1204 case OMAP_DISPLAY_TYPE_SDI:
1205 r = sdi_init_port(dss, pdev, port);
1206 if (r)
1207 goto error;
1208 break;
1209
1210 default:
1211 break;
1212 }
1213 of_node_put(port);
1214 }
1215
1216 return 0;
1217
1218 error:
1219 of_node_put(port);
1220 __dss_uninit_ports(dss, i);
1221 return r;
1222 }
1223
dss_uninit_ports(struct dss_device * dss)1224 static void dss_uninit_ports(struct dss_device *dss)
1225 {
1226 __dss_uninit_ports(dss, dss->feat->num_ports);
1227 }
1228
dss_video_pll_probe(struct dss_device * dss)1229 static int dss_video_pll_probe(struct dss_device *dss)
1230 {
1231 struct platform_device *pdev = dss->pdev;
1232 struct device_node *np = pdev->dev.of_node;
1233 struct regulator *pll_regulator;
1234 int r;
1235
1236 if (!np)
1237 return 0;
1238
1239 if (of_property_read_bool(np, "syscon-pll-ctrl")) {
1240 dss->syscon_pll_ctrl = syscon_regmap_lookup_by_phandle(np,
1241 "syscon-pll-ctrl");
1242 if (IS_ERR(dss->syscon_pll_ctrl)) {
1243 dev_err(&pdev->dev,
1244 "failed to get syscon-pll-ctrl regmap\n");
1245 return PTR_ERR(dss->syscon_pll_ctrl);
1246 }
1247
1248 if (of_property_read_u32_index(np, "syscon-pll-ctrl", 1,
1249 &dss->syscon_pll_ctrl_offset)) {
1250 dev_err(&pdev->dev,
1251 "failed to get syscon-pll-ctrl offset\n");
1252 return -EINVAL;
1253 }
1254 }
1255
1256 pll_regulator = devm_regulator_get(&pdev->dev, "vdda_video");
1257 if (IS_ERR(pll_regulator)) {
1258 r = PTR_ERR(pll_regulator);
1259
1260 switch (r) {
1261 case -ENOENT:
1262 pll_regulator = NULL;
1263 break;
1264
1265 case -EPROBE_DEFER:
1266 return -EPROBE_DEFER;
1267
1268 default:
1269 DSSERR("can't get DPLL VDDA regulator\n");
1270 return r;
1271 }
1272 }
1273
1274 if (of_property_match_string(np, "reg-names", "pll1") >= 0) {
1275 dss->video1_pll = dss_video_pll_init(dss, pdev, 0,
1276 pll_regulator);
1277 if (IS_ERR(dss->video1_pll))
1278 return PTR_ERR(dss->video1_pll);
1279 }
1280
1281 if (of_property_match_string(np, "reg-names", "pll2") >= 0) {
1282 dss->video2_pll = dss_video_pll_init(dss, pdev, 1,
1283 pll_regulator);
1284 if (IS_ERR(dss->video2_pll)) {
1285 dss_video_pll_uninit(dss->video1_pll);
1286 return PTR_ERR(dss->video2_pll);
1287 }
1288 }
1289
1290 return 0;
1291 }
1292
1293 /* DSS HW IP initialisation */
1294 static const struct of_device_id dss_of_match[] = {
1295 { .compatible = "ti,omap2-dss", .data = &omap24xx_dss_feats },
1296 { .compatible = "ti,omap3-dss", .data = &omap3630_dss_feats },
1297 { .compatible = "ti,omap4-dss", .data = &omap44xx_dss_feats },
1298 { .compatible = "ti,omap5-dss", .data = &omap54xx_dss_feats },
1299 { .compatible = "ti,dra7-dss", .data = &dra7xx_dss_feats },
1300 {},
1301 };
1302 MODULE_DEVICE_TABLE(of, dss_of_match);
1303
1304 static const struct soc_device_attribute dss_soc_devices[] = {
1305 { .machine = "OMAP3430/3530", .data = &omap34xx_dss_feats },
1306 { .machine = "AM35??", .data = &omap34xx_dss_feats },
1307 { .family = "AM43xx", .data = &am43xx_dss_feats },
1308 { /* sentinel */ }
1309 };
1310
dss_bind(struct device * dev)1311 static int dss_bind(struct device *dev)
1312 {
1313 struct dss_device *dss = dev_get_drvdata(dev);
1314 struct platform_device *drm_pdev;
1315 struct dss_pdata pdata;
1316 int r;
1317
1318 r = component_bind_all(dev, NULL);
1319 if (r)
1320 return r;
1321
1322 pm_set_vt_switch(0);
1323
1324 pdata.dss = dss;
1325 drm_pdev = platform_device_register_data(NULL, "omapdrm", 0,
1326 &pdata, sizeof(pdata));
1327 if (IS_ERR(drm_pdev)) {
1328 component_unbind_all(dev, NULL);
1329 return PTR_ERR(drm_pdev);
1330 }
1331
1332 dss->drm_pdev = drm_pdev;
1333
1334 return 0;
1335 }
1336
dss_unbind(struct device * dev)1337 static void dss_unbind(struct device *dev)
1338 {
1339 struct dss_device *dss = dev_get_drvdata(dev);
1340
1341 platform_device_unregister(dss->drm_pdev);
1342
1343 component_unbind_all(dev, NULL);
1344 }
1345
1346 static const struct component_master_ops dss_component_ops = {
1347 .bind = dss_bind,
1348 .unbind = dss_unbind,
1349 };
1350
1351 struct dss_component_match_data {
1352 struct device *dev;
1353 struct component_match **match;
1354 };
1355
dss_add_child_component(struct device * dev,void * data)1356 static int dss_add_child_component(struct device *dev, void *data)
1357 {
1358 struct dss_component_match_data *cmatch = data;
1359 struct component_match **match = cmatch->match;
1360
1361 /*
1362 * HACK
1363 * We don't have a working driver for rfbi, so skip it here always.
1364 * Otherwise dss will never get probed successfully, as it will wait
1365 * for rfbi to get probed.
1366 */
1367 if (strstr(dev_name(dev), "rfbi"))
1368 return 0;
1369
1370 /*
1371 * Handle possible interconnect target modules defined within the DSS.
1372 * The DSS components can be children of an interconnect target module
1373 * after the device tree has been updated for the module data.
1374 * See also omapdss_boot_init() for compatible fixup.
1375 */
1376 if (strstr(dev_name(dev), "target-module"))
1377 return device_for_each_child(dev, cmatch,
1378 dss_add_child_component);
1379
1380 component_match_add(cmatch->dev, match, component_compare_dev, dev);
1381
1382 return 0;
1383 }
1384
dss_probe_hardware(struct dss_device * dss)1385 static int dss_probe_hardware(struct dss_device *dss)
1386 {
1387 u32 rev;
1388 int r;
1389
1390 r = dss_runtime_get(dss);
1391 if (r)
1392 return r;
1393
1394 dss->dss_clk_rate = clk_get_rate(dss->dss_clk);
1395
1396 /* Select DPLL */
1397 REG_FLD_MOD(dss, DSS_CONTROL, 0, 0, 0);
1398
1399 dss_select_dispc_clk_source(dss, DSS_CLK_SRC_FCK);
1400
1401 #ifdef CONFIG_OMAP2_DSS_VENC
1402 REG_FLD_MOD(dss, DSS_CONTROL, 1, 4, 4); /* venc dac demen */
1403 REG_FLD_MOD(dss, DSS_CONTROL, 1, 3, 3); /* venc clock 4x enable */
1404 REG_FLD_MOD(dss, DSS_CONTROL, 0, 2, 2); /* venc clock mode = normal */
1405 #endif
1406 dss->dsi_clk_source[0] = DSS_CLK_SRC_FCK;
1407 dss->dsi_clk_source[1] = DSS_CLK_SRC_FCK;
1408 dss->dispc_clk_source = DSS_CLK_SRC_FCK;
1409 dss->lcd_clk_source[0] = DSS_CLK_SRC_FCK;
1410 dss->lcd_clk_source[1] = DSS_CLK_SRC_FCK;
1411
1412 rev = dss_read_reg(dss, DSS_REVISION);
1413 pr_info("OMAP DSS rev %d.%d\n", FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
1414
1415 dss_runtime_put(dss);
1416
1417 return 0;
1418 }
1419
dss_probe(struct platform_device * pdev)1420 static int dss_probe(struct platform_device *pdev)
1421 {
1422 const struct soc_device_attribute *soc;
1423 struct dss_component_match_data cmatch;
1424 struct component_match *match = NULL;
1425 struct dss_device *dss;
1426 int r;
1427
1428 dss = kzalloc(sizeof(*dss), GFP_KERNEL);
1429 if (!dss)
1430 return -ENOMEM;
1431
1432 dss->pdev = pdev;
1433 platform_set_drvdata(pdev, dss);
1434
1435 r = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1436 if (r) {
1437 dev_err(&pdev->dev, "Failed to set the DMA mask\n");
1438 goto err_free_dss;
1439 }
1440
1441 /*
1442 * The various OMAP3-based SoCs can't be told apart using the compatible
1443 * string, use SoC device matching.
1444 */
1445 soc = soc_device_match(dss_soc_devices);
1446 if (soc)
1447 dss->feat = soc->data;
1448 else
1449 dss->feat = device_get_match_data(&pdev->dev);
1450
1451 /* Map I/O registers, get and setup clocks. */
1452 dss->base = devm_platform_ioremap_resource(pdev, 0);
1453 if (IS_ERR(dss->base)) {
1454 r = PTR_ERR(dss->base);
1455 goto err_free_dss;
1456 }
1457
1458 r = dss_get_clocks(dss);
1459 if (r)
1460 goto err_free_dss;
1461
1462 r = dss_setup_default_clock(dss);
1463 if (r)
1464 goto err_put_clocks;
1465
1466 /* Setup the video PLLs and the DPI and SDI ports. */
1467 r = dss_video_pll_probe(dss);
1468 if (r)
1469 goto err_put_clocks;
1470
1471 r = dss_init_ports(dss);
1472 if (r)
1473 goto err_uninit_plls;
1474
1475 /* Enable runtime PM and probe the hardware. */
1476 pm_runtime_enable(&pdev->dev);
1477
1478 r = dss_probe_hardware(dss);
1479 if (r)
1480 goto err_pm_runtime_disable;
1481
1482 /* Initialize debugfs. */
1483 r = dss_initialize_debugfs(dss);
1484 if (r)
1485 goto err_pm_runtime_disable;
1486
1487 dss->debugfs.clk = dss_debugfs_create_file(dss, "clk",
1488 dss_debug_dump_clocks, dss);
1489 dss->debugfs.dss = dss_debugfs_create_file(dss, "dss", dss_dump_regs,
1490 dss);
1491
1492 /* Add all the child devices as components. */
1493 r = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
1494 if (r)
1495 goto err_uninit_debugfs;
1496
1497 omapdss_gather_components(&pdev->dev);
1498
1499 cmatch.dev = &pdev->dev;
1500 cmatch.match = &match;
1501 device_for_each_child(&pdev->dev, &cmatch, dss_add_child_component);
1502
1503 r = component_master_add_with_match(&pdev->dev, &dss_component_ops, match);
1504 if (r)
1505 goto err_of_depopulate;
1506
1507 return 0;
1508
1509 err_of_depopulate:
1510 of_platform_depopulate(&pdev->dev);
1511
1512 err_uninit_debugfs:
1513 dss_debugfs_remove_file(dss->debugfs.clk);
1514 dss_debugfs_remove_file(dss->debugfs.dss);
1515 dss_uninitialize_debugfs(dss);
1516
1517 err_pm_runtime_disable:
1518 pm_runtime_disable(&pdev->dev);
1519 dss_uninit_ports(dss);
1520
1521 err_uninit_plls:
1522 if (dss->video1_pll)
1523 dss_video_pll_uninit(dss->video1_pll);
1524 if (dss->video2_pll)
1525 dss_video_pll_uninit(dss->video2_pll);
1526
1527 err_put_clocks:
1528 dss_put_clocks(dss);
1529
1530 err_free_dss:
1531 kfree(dss);
1532
1533 return r;
1534 }
1535
dss_remove(struct platform_device * pdev)1536 static void dss_remove(struct platform_device *pdev)
1537 {
1538 struct dss_device *dss = platform_get_drvdata(pdev);
1539
1540 of_platform_depopulate(&pdev->dev);
1541
1542 component_master_del(&pdev->dev, &dss_component_ops);
1543
1544 dss_debugfs_remove_file(dss->debugfs.clk);
1545 dss_debugfs_remove_file(dss->debugfs.dss);
1546 dss_uninitialize_debugfs(dss);
1547
1548 pm_runtime_disable(&pdev->dev);
1549
1550 dss_uninit_ports(dss);
1551
1552 if (dss->video1_pll)
1553 dss_video_pll_uninit(dss->video1_pll);
1554
1555 if (dss->video2_pll)
1556 dss_video_pll_uninit(dss->video2_pll);
1557
1558 dss_put_clocks(dss);
1559
1560 kfree(dss);
1561 }
1562
dss_shutdown(struct platform_device * pdev)1563 static void dss_shutdown(struct platform_device *pdev)
1564 {
1565 DSSDBG("shutdown\n");
1566 }
1567
dss_runtime_suspend(struct device * dev)1568 static __maybe_unused int dss_runtime_suspend(struct device *dev)
1569 {
1570 struct dss_device *dss = dev_get_drvdata(dev);
1571
1572 dss_save_context(dss);
1573 dss_set_min_bus_tput(dev, 0);
1574
1575 pinctrl_pm_select_sleep_state(dev);
1576
1577 return 0;
1578 }
1579
dss_runtime_resume(struct device * dev)1580 static __maybe_unused int dss_runtime_resume(struct device *dev)
1581 {
1582 struct dss_device *dss = dev_get_drvdata(dev);
1583 int r;
1584
1585 pinctrl_pm_select_default_state(dev);
1586
1587 /*
1588 * Set an arbitrarily high tput request to ensure OPP100.
1589 * What we should really do is to make a request to stay in OPP100,
1590 * without any tput requirements, but that is not currently possible
1591 * via the PM layer.
1592 */
1593
1594 r = dss_set_min_bus_tput(dev, 1000000000);
1595 if (r)
1596 return r;
1597
1598 dss_restore_context(dss);
1599 return 0;
1600 }
1601
1602 static const struct dev_pm_ops dss_pm_ops = {
1603 SET_RUNTIME_PM_OPS(dss_runtime_suspend, dss_runtime_resume, NULL)
1604 SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
1605 };
1606
1607 struct platform_driver omap_dsshw_driver = {
1608 .probe = dss_probe,
1609 .remove_new = dss_remove,
1610 .shutdown = dss_shutdown,
1611 .driver = {
1612 .name = "omapdss_dss",
1613 .pm = &dss_pm_ops,
1614 .of_match_table = dss_of_match,
1615 .suppress_bind_attrs = true,
1616 },
1617 };
1618
1619 /* INIT */
1620 static struct platform_driver * const omap_dss_drivers[] = {
1621 &omap_dsshw_driver,
1622 &omap_dispchw_driver,
1623 #ifdef CONFIG_OMAP2_DSS_DSI
1624 &omap_dsihw_driver,
1625 #endif
1626 #ifdef CONFIG_OMAP2_DSS_VENC
1627 &omap_venchw_driver,
1628 #endif
1629 #ifdef CONFIG_OMAP4_DSS_HDMI
1630 &omapdss_hdmi4hw_driver,
1631 #endif
1632 #ifdef CONFIG_OMAP5_DSS_HDMI
1633 &omapdss_hdmi5hw_driver,
1634 #endif
1635 };
1636
omap_dss_init(void)1637 int __init omap_dss_init(void)
1638 {
1639 return platform_register_drivers(omap_dss_drivers,
1640 ARRAY_SIZE(omap_dss_drivers));
1641 }
1642
omap_dss_exit(void)1643 void omap_dss_exit(void)
1644 {
1645 platform_unregister_drivers(omap_dss_drivers,
1646 ARRAY_SIZE(omap_dss_drivers));
1647 }
1648