1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/drivers/video/omap2/dss/dss.c
4 *
5 * Copyright (C) 2009 Nokia Corporation
6 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7 *
8 * Some code and ideas taken from drivers/video/omap/ driver
9 * by Imre Deak.
10 */
11
12 #define DSS_SUBSYS_NAME "DSS"
13
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/platform_device.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/gfp.h>
25 #include <linux/sizes.h>
26 #include <linux/mfd/syscon.h>
27 #include <linux/regmap.h>
28 #include <linux/of.h>
29 #include <linux/of_graph.h>
30 #include <linux/regulator/consumer.h>
31 #include <linux/suspend.h>
32 #include <linux/component.h>
33 #include <linux/pinctrl/consumer.h>
34
35 #include <video/omapfb_dss.h>
36
37 #include "dss.h"
38 #include "dss_features.h"
39
40 #define DSS_SZ_REGS SZ_512
41
42 struct dss_reg {
43 u16 idx;
44 };
45
46 #define DSS_REG(idx) ((const struct dss_reg) { idx })
47
48 #define DSS_REVISION DSS_REG(0x0000)
49 #define DSS_SYSCONFIG DSS_REG(0x0010)
50 #define DSS_SYSSTATUS DSS_REG(0x0014)
51 #define DSS_CONTROL DSS_REG(0x0040)
52 #define DSS_SDI_CONTROL DSS_REG(0x0044)
53 #define DSS_PLL_CONTROL DSS_REG(0x0048)
54 #define DSS_SDI_STATUS DSS_REG(0x005C)
55
56 #define REG_GET(idx, start, end) \
57 FLD_GET(dss_read_reg(idx), start, end)
58
59 #define REG_FLD_MOD(idx, val, start, end) \
60 dss_write_reg(idx, FLD_MOD(dss_read_reg(idx), val, start, end))
61
62 struct dss_features {
63 u8 fck_div_max;
64 u8 dss_fck_multiplier;
65 const char *parent_clk_name;
66 const enum omap_display_type *ports;
67 int num_ports;
68 int (*dpi_select_source)(int port, enum omap_channel channel);
69 };
70
71 static struct {
72 struct platform_device *pdev;
73 void __iomem *base;
74 struct regmap *syscon_pll_ctrl;
75 u32 syscon_pll_ctrl_offset;
76
77 struct clk *parent_clk;
78 struct clk *dss_clk;
79 unsigned long dss_clk_rate;
80
81 unsigned long cache_req_pck;
82 unsigned long cache_prate;
83 struct dispc_clock_info cache_dispc_cinfo;
84
85 enum omap_dss_clk_source dsi_clk_source[MAX_NUM_DSI];
86 enum omap_dss_clk_source dispc_clk_source;
87 enum omap_dss_clk_source lcd_clk_source[MAX_DSS_LCD_MANAGERS];
88
89 bool ctx_valid;
90 u32 ctx[DSS_SZ_REGS / sizeof(u32)];
91
92 const struct dss_features *feat;
93
94 struct dss_pll *video1_pll;
95 struct dss_pll *video2_pll;
96 } dss;
97
98 static const char * const dss_generic_clk_source_names[] = {
99 [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC] = "DSI_PLL_HSDIV_DISPC",
100 [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI] = "DSI_PLL_HSDIV_DSI",
101 [OMAP_DSS_CLK_SRC_FCK] = "DSS_FCK",
102 [OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC] = "DSI_PLL2_HSDIV_DISPC",
103 [OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI] = "DSI_PLL2_HSDIV_DSI",
104 };
105
106 static bool dss_initialized;
107
omapdss_is_initialized(void)108 bool omapdss_is_initialized(void)
109 {
110 return dss_initialized;
111 }
112 EXPORT_SYMBOL(omapdss_is_initialized);
113
dss_write_reg(const struct dss_reg idx,u32 val)114 static inline void dss_write_reg(const struct dss_reg idx, u32 val)
115 {
116 __raw_writel(val, dss.base + idx.idx);
117 }
118
dss_read_reg(const struct dss_reg idx)119 static inline u32 dss_read_reg(const struct dss_reg idx)
120 {
121 return __raw_readl(dss.base + idx.idx);
122 }
123
124 #define SR(reg) \
125 dss.ctx[(DSS_##reg).idx / sizeof(u32)] = dss_read_reg(DSS_##reg)
126 #define RR(reg) \
127 dss_write_reg(DSS_##reg, dss.ctx[(DSS_##reg).idx / sizeof(u32)])
128
dss_save_context(void)129 static void dss_save_context(void)
130 {
131 DSSDBG("dss_save_context\n");
132
133 SR(CONTROL);
134
135 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
136 OMAP_DISPLAY_TYPE_SDI) {
137 SR(SDI_CONTROL);
138 SR(PLL_CONTROL);
139 }
140
141 dss.ctx_valid = true;
142
143 DSSDBG("context saved\n");
144 }
145
dss_restore_context(void)146 static void dss_restore_context(void)
147 {
148 DSSDBG("dss_restore_context\n");
149
150 if (!dss.ctx_valid)
151 return;
152
153 RR(CONTROL);
154
155 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
156 OMAP_DISPLAY_TYPE_SDI) {
157 RR(SDI_CONTROL);
158 RR(PLL_CONTROL);
159 }
160
161 DSSDBG("context restored\n");
162 }
163
164 #undef SR
165 #undef RR
166
dss_ctrl_pll_enable(enum dss_pll_id pll_id,bool enable)167 void dss_ctrl_pll_enable(enum dss_pll_id pll_id, bool enable)
168 {
169 unsigned shift;
170 unsigned val;
171
172 if (!dss.syscon_pll_ctrl)
173 return;
174
175 val = !enable;
176
177 switch (pll_id) {
178 case DSS_PLL_VIDEO1:
179 shift = 0;
180 break;
181 case DSS_PLL_VIDEO2:
182 shift = 1;
183 break;
184 case DSS_PLL_HDMI:
185 shift = 2;
186 break;
187 default:
188 DSSERR("illegal DSS PLL ID %d\n", pll_id);
189 return;
190 }
191
192 regmap_update_bits(dss.syscon_pll_ctrl, dss.syscon_pll_ctrl_offset,
193 1 << shift, val << shift);
194 }
195
dss_ctrl_pll_set_control_mux(enum dss_pll_id pll_id,enum omap_channel channel)196 void dss_ctrl_pll_set_control_mux(enum dss_pll_id pll_id,
197 enum omap_channel channel)
198 {
199 unsigned shift, val;
200
201 if (!dss.syscon_pll_ctrl)
202 return;
203
204 switch (channel) {
205 case OMAP_DSS_CHANNEL_LCD:
206 shift = 3;
207
208 switch (pll_id) {
209 case DSS_PLL_VIDEO1:
210 val = 0; break;
211 case DSS_PLL_HDMI:
212 val = 1; break;
213 default:
214 DSSERR("error in PLL mux config for LCD\n");
215 return;
216 }
217
218 break;
219 case OMAP_DSS_CHANNEL_LCD2:
220 shift = 5;
221
222 switch (pll_id) {
223 case DSS_PLL_VIDEO1:
224 val = 0; break;
225 case DSS_PLL_VIDEO2:
226 val = 1; break;
227 case DSS_PLL_HDMI:
228 val = 2; break;
229 default:
230 DSSERR("error in PLL mux config for LCD2\n");
231 return;
232 }
233
234 break;
235 case OMAP_DSS_CHANNEL_LCD3:
236 shift = 7;
237
238 switch (pll_id) {
239 case DSS_PLL_VIDEO1:
240 val = 1; break;
241 case DSS_PLL_VIDEO2:
242 val = 0; break;
243 case DSS_PLL_HDMI:
244 val = 2; break;
245 default:
246 DSSERR("error in PLL mux config for LCD3\n");
247 return;
248 }
249
250 break;
251 default:
252 DSSERR("error in PLL mux config\n");
253 return;
254 }
255
256 regmap_update_bits(dss.syscon_pll_ctrl, dss.syscon_pll_ctrl_offset,
257 0x3 << shift, val << shift);
258 }
259
dss_sdi_init(int datapairs)260 void dss_sdi_init(int datapairs)
261 {
262 u32 l;
263
264 BUG_ON(datapairs > 3 || datapairs < 1);
265
266 l = dss_read_reg(DSS_SDI_CONTROL);
267 l = FLD_MOD(l, 0xf, 19, 15); /* SDI_PDIV */
268 l = FLD_MOD(l, datapairs-1, 3, 2); /* SDI_PRSEL */
269 l = FLD_MOD(l, 2, 1, 0); /* SDI_BWSEL */
270 dss_write_reg(DSS_SDI_CONTROL, l);
271
272 l = dss_read_reg(DSS_PLL_CONTROL);
273 l = FLD_MOD(l, 0x7, 25, 22); /* SDI_PLL_FREQSEL */
274 l = FLD_MOD(l, 0xb, 16, 11); /* SDI_PLL_REGN */
275 l = FLD_MOD(l, 0xb4, 10, 1); /* SDI_PLL_REGM */
276 dss_write_reg(DSS_PLL_CONTROL, l);
277 }
278
dss_sdi_enable(void)279 int dss_sdi_enable(void)
280 {
281 unsigned long timeout;
282
283 dispc_pck_free_enable(1);
284
285 /* Reset SDI PLL */
286 REG_FLD_MOD(DSS_PLL_CONTROL, 1, 18, 18); /* SDI_PLL_SYSRESET */
287 udelay(1); /* wait 2x PCLK */
288
289 /* Lock SDI PLL */
290 REG_FLD_MOD(DSS_PLL_CONTROL, 1, 28, 28); /* SDI_PLL_GOBIT */
291
292 /* Waiting for PLL lock request to complete */
293 timeout = jiffies + msecs_to_jiffies(500);
294 while (dss_read_reg(DSS_SDI_STATUS) & (1 << 6)) {
295 if (time_after_eq(jiffies, timeout)) {
296 DSSERR("PLL lock request timed out\n");
297 goto err1;
298 }
299 }
300
301 /* Clearing PLL_GO bit */
302 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 28, 28);
303
304 /* Waiting for PLL to lock */
305 timeout = jiffies + msecs_to_jiffies(500);
306 while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 5))) {
307 if (time_after_eq(jiffies, timeout)) {
308 DSSERR("PLL lock timed out\n");
309 goto err1;
310 }
311 }
312
313 dispc_lcd_enable_signal(1);
314
315 /* Waiting for SDI reset to complete */
316 timeout = jiffies + msecs_to_jiffies(500);
317 while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 2))) {
318 if (time_after_eq(jiffies, timeout)) {
319 DSSERR("SDI reset timed out\n");
320 goto err2;
321 }
322 }
323
324 return 0;
325
326 err2:
327 dispc_lcd_enable_signal(0);
328 err1:
329 /* Reset SDI PLL */
330 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
331
332 dispc_pck_free_enable(0);
333
334 return -ETIMEDOUT;
335 }
336
dss_sdi_disable(void)337 void dss_sdi_disable(void)
338 {
339 dispc_lcd_enable_signal(0);
340
341 dispc_pck_free_enable(0);
342
343 /* Reset SDI PLL */
344 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
345 }
346
dss_get_generic_clk_source_name(enum omap_dss_clk_source clk_src)347 const char *dss_get_generic_clk_source_name(enum omap_dss_clk_source clk_src)
348 {
349 return dss_generic_clk_source_names[clk_src];
350 }
351
dss_dump_clocks(struct seq_file * s)352 void dss_dump_clocks(struct seq_file *s)
353 {
354 const char *fclk_name, *fclk_real_name;
355 unsigned long fclk_rate;
356
357 if (dss_runtime_get())
358 return;
359
360 seq_printf(s, "- DSS -\n");
361
362 fclk_name = dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_FCK);
363 fclk_real_name = dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_FCK);
364 fclk_rate = clk_get_rate(dss.dss_clk);
365
366 seq_printf(s, "%s (%s) = %lu\n",
367 fclk_name, fclk_real_name,
368 fclk_rate);
369
370 dss_runtime_put();
371 }
372
dss_dump_regs(struct seq_file * s)373 static void dss_dump_regs(struct seq_file *s)
374 {
375 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(r))
376
377 if (dss_runtime_get())
378 return;
379
380 DUMPREG(DSS_REVISION);
381 DUMPREG(DSS_SYSCONFIG);
382 DUMPREG(DSS_SYSSTATUS);
383 DUMPREG(DSS_CONTROL);
384
385 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
386 OMAP_DISPLAY_TYPE_SDI) {
387 DUMPREG(DSS_SDI_CONTROL);
388 DUMPREG(DSS_PLL_CONTROL);
389 DUMPREG(DSS_SDI_STATUS);
390 }
391
392 dss_runtime_put();
393 #undef DUMPREG
394 }
395
dss_select_dispc_clk_source(enum omap_dss_clk_source clk_src)396 static void dss_select_dispc_clk_source(enum omap_dss_clk_source clk_src)
397 {
398 int b;
399 u8 start, end;
400
401 switch (clk_src) {
402 case OMAP_DSS_CLK_SRC_FCK:
403 b = 0;
404 break;
405 case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC:
406 b = 1;
407 break;
408 case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC:
409 b = 2;
410 break;
411 default:
412 BUG();
413 return;
414 }
415
416 dss_feat_get_reg_field(FEAT_REG_DISPC_CLK_SWITCH, &start, &end);
417
418 REG_FLD_MOD(DSS_CONTROL, b, start, end); /* DISPC_CLK_SWITCH */
419
420 dss.dispc_clk_source = clk_src;
421 }
422
dss_select_dsi_clk_source(int dsi_module,enum omap_dss_clk_source clk_src)423 void dss_select_dsi_clk_source(int dsi_module,
424 enum omap_dss_clk_source clk_src)
425 {
426 int b, pos;
427
428 switch (clk_src) {
429 case OMAP_DSS_CLK_SRC_FCK:
430 b = 0;
431 break;
432 case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI:
433 BUG_ON(dsi_module != 0);
434 b = 1;
435 break;
436 case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI:
437 BUG_ON(dsi_module != 1);
438 b = 1;
439 break;
440 default:
441 BUG();
442 return;
443 }
444
445 pos = dsi_module == 0 ? 1 : 10;
446 REG_FLD_MOD(DSS_CONTROL, b, pos, pos); /* DSIx_CLK_SWITCH */
447
448 dss.dsi_clk_source[dsi_module] = clk_src;
449 }
450
dss_select_lcd_clk_source(enum omap_channel channel,enum omap_dss_clk_source clk_src)451 void dss_select_lcd_clk_source(enum omap_channel channel,
452 enum omap_dss_clk_source clk_src)
453 {
454 int b, ix, pos;
455
456 if (!dss_has_feature(FEAT_LCD_CLK_SRC)) {
457 dss_select_dispc_clk_source(clk_src);
458 return;
459 }
460
461 switch (clk_src) {
462 case OMAP_DSS_CLK_SRC_FCK:
463 b = 0;
464 break;
465 case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC:
466 BUG_ON(channel != OMAP_DSS_CHANNEL_LCD);
467 b = 1;
468 break;
469 case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC:
470 BUG_ON(channel != OMAP_DSS_CHANNEL_LCD2 &&
471 channel != OMAP_DSS_CHANNEL_LCD3);
472 b = 1;
473 break;
474 default:
475 BUG();
476 return;
477 }
478
479 pos = channel == OMAP_DSS_CHANNEL_LCD ? 0 :
480 (channel == OMAP_DSS_CHANNEL_LCD2 ? 12 : 19);
481 REG_FLD_MOD(DSS_CONTROL, b, pos, pos); /* LCDx_CLK_SWITCH */
482
483 ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 :
484 (channel == OMAP_DSS_CHANNEL_LCD2 ? 1 : 2);
485 dss.lcd_clk_source[ix] = clk_src;
486 }
487
dss_get_dispc_clk_source(void)488 enum omap_dss_clk_source dss_get_dispc_clk_source(void)
489 {
490 return dss.dispc_clk_source;
491 }
492
dss_get_dsi_clk_source(int dsi_module)493 enum omap_dss_clk_source dss_get_dsi_clk_source(int dsi_module)
494 {
495 return dss.dsi_clk_source[dsi_module];
496 }
497
dss_get_lcd_clk_source(enum omap_channel channel)498 enum omap_dss_clk_source dss_get_lcd_clk_source(enum omap_channel channel)
499 {
500 if (dss_has_feature(FEAT_LCD_CLK_SRC)) {
501 int ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 :
502 (channel == OMAP_DSS_CHANNEL_LCD2 ? 1 : 2);
503 return dss.lcd_clk_source[ix];
504 } else {
505 /* LCD_CLK source is the same as DISPC_FCLK source for
506 * OMAP2 and OMAP3 */
507 return dss.dispc_clk_source;
508 }
509 }
510
dss_div_calc(unsigned long pck,unsigned long fck_min,dss_div_calc_func func,void * data)511 bool dss_div_calc(unsigned long pck, unsigned long fck_min,
512 dss_div_calc_func func, void *data)
513 {
514 int fckd, fckd_start, fckd_stop;
515 unsigned long fck;
516 unsigned long fck_hw_max;
517 unsigned long fckd_hw_max;
518 unsigned long prate;
519 unsigned m;
520
521 fck_hw_max = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK);
522
523 if (dss.parent_clk == NULL) {
524 unsigned pckd;
525
526 pckd = fck_hw_max / pck;
527
528 fck = pck * pckd;
529
530 fck = clk_round_rate(dss.dss_clk, fck);
531
532 return func(fck, data);
533 }
534
535 fckd_hw_max = dss.feat->fck_div_max;
536
537 m = dss.feat->dss_fck_multiplier;
538 prate = clk_get_rate(dss.parent_clk);
539
540 fck_min = fck_min ? fck_min : 1;
541
542 fckd_start = min(prate * m / fck_min, fckd_hw_max);
543 fckd_stop = max(DIV_ROUND_UP(prate * m, fck_hw_max), 1ul);
544
545 for (fckd = fckd_start; fckd >= fckd_stop; --fckd) {
546 fck = DIV_ROUND_UP(prate, fckd) * m;
547
548 if (func(fck, data))
549 return true;
550 }
551
552 return false;
553 }
554
dss_set_fck_rate(unsigned long rate)555 int dss_set_fck_rate(unsigned long rate)
556 {
557 int r;
558
559 DSSDBG("set fck to %lu\n", rate);
560
561 r = clk_set_rate(dss.dss_clk, rate);
562 if (r)
563 return r;
564
565 dss.dss_clk_rate = clk_get_rate(dss.dss_clk);
566
567 WARN_ONCE(dss.dss_clk_rate != rate,
568 "clk rate mismatch: %lu != %lu", dss.dss_clk_rate,
569 rate);
570
571 return 0;
572 }
573
dss_get_dispc_clk_rate(void)574 unsigned long dss_get_dispc_clk_rate(void)
575 {
576 return dss.dss_clk_rate;
577 }
578
dss_setup_default_clock(void)579 static int dss_setup_default_clock(void)
580 {
581 unsigned long max_dss_fck, prate;
582 unsigned long fck;
583 unsigned fck_div;
584 int r;
585
586 max_dss_fck = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK);
587
588 if (dss.parent_clk == NULL) {
589 fck = clk_round_rate(dss.dss_clk, max_dss_fck);
590 } else {
591 prate = clk_get_rate(dss.parent_clk);
592
593 fck_div = DIV_ROUND_UP(prate * dss.feat->dss_fck_multiplier,
594 max_dss_fck);
595 fck = DIV_ROUND_UP(prate, fck_div) * dss.feat->dss_fck_multiplier;
596 }
597
598 r = dss_set_fck_rate(fck);
599 if (r)
600 return r;
601
602 return 0;
603 }
604
dss_set_venc_output(enum omap_dss_venc_type type)605 void dss_set_venc_output(enum omap_dss_venc_type type)
606 {
607 int l = 0;
608
609 if (type == OMAP_DSS_VENC_TYPE_COMPOSITE)
610 l = 0;
611 else if (type == OMAP_DSS_VENC_TYPE_SVIDEO)
612 l = 1;
613 else
614 BUG();
615
616 /* venc out selection. 0 = comp, 1 = svideo */
617 REG_FLD_MOD(DSS_CONTROL, l, 6, 6);
618 }
619
dss_set_dac_pwrdn_bgz(bool enable)620 void dss_set_dac_pwrdn_bgz(bool enable)
621 {
622 REG_FLD_MOD(DSS_CONTROL, enable, 5, 5); /* DAC Power-Down Control */
623 }
624
dss_select_hdmi_venc_clk_source(enum dss_hdmi_venc_clk_source_select src)625 void dss_select_hdmi_venc_clk_source(enum dss_hdmi_venc_clk_source_select src)
626 {
627 enum omap_display_type dp;
628 dp = dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_DIGIT);
629
630 /* Complain about invalid selections */
631 WARN_ON((src == DSS_VENC_TV_CLK) && !(dp & OMAP_DISPLAY_TYPE_VENC));
632 WARN_ON((src == DSS_HDMI_M_PCLK) && !(dp & OMAP_DISPLAY_TYPE_HDMI));
633
634 /* Select only if we have options */
635 if ((dp & OMAP_DISPLAY_TYPE_VENC) && (dp & OMAP_DISPLAY_TYPE_HDMI))
636 REG_FLD_MOD(DSS_CONTROL, src, 15, 15); /* VENC_HDMI_SWITCH */
637 }
638
dss_get_hdmi_venc_clk_source(void)639 enum dss_hdmi_venc_clk_source_select dss_get_hdmi_venc_clk_source(void)
640 {
641 enum omap_display_type displays;
642
643 displays = dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_DIGIT);
644 if ((displays & OMAP_DISPLAY_TYPE_HDMI) == 0)
645 return DSS_VENC_TV_CLK;
646
647 if ((displays & OMAP_DISPLAY_TYPE_VENC) == 0)
648 return DSS_HDMI_M_PCLK;
649
650 return REG_GET(DSS_CONTROL, 15, 15);
651 }
652
dss_dpi_select_source_omap2_omap3(int port,enum omap_channel channel)653 static int dss_dpi_select_source_omap2_omap3(int port, enum omap_channel channel)
654 {
655 if (channel != OMAP_DSS_CHANNEL_LCD)
656 return -EINVAL;
657
658 return 0;
659 }
660
dss_dpi_select_source_omap4(int port,enum omap_channel channel)661 static int dss_dpi_select_source_omap4(int port, enum omap_channel channel)
662 {
663 int val;
664
665 switch (channel) {
666 case OMAP_DSS_CHANNEL_LCD2:
667 val = 0;
668 break;
669 case OMAP_DSS_CHANNEL_DIGIT:
670 val = 1;
671 break;
672 default:
673 return -EINVAL;
674 }
675
676 REG_FLD_MOD(DSS_CONTROL, val, 17, 17);
677
678 return 0;
679 }
680
dss_dpi_select_source_omap5(int port,enum omap_channel channel)681 static int dss_dpi_select_source_omap5(int port, enum omap_channel channel)
682 {
683 int val;
684
685 switch (channel) {
686 case OMAP_DSS_CHANNEL_LCD:
687 val = 1;
688 break;
689 case OMAP_DSS_CHANNEL_LCD2:
690 val = 2;
691 break;
692 case OMAP_DSS_CHANNEL_LCD3:
693 val = 3;
694 break;
695 case OMAP_DSS_CHANNEL_DIGIT:
696 val = 0;
697 break;
698 default:
699 return -EINVAL;
700 }
701
702 REG_FLD_MOD(DSS_CONTROL, val, 17, 16);
703
704 return 0;
705 }
706
dss_dpi_select_source_dra7xx(int port,enum omap_channel channel)707 static int dss_dpi_select_source_dra7xx(int port, enum omap_channel channel)
708 {
709 switch (port) {
710 case 0:
711 return dss_dpi_select_source_omap5(port, channel);
712 case 1:
713 if (channel != OMAP_DSS_CHANNEL_LCD2)
714 return -EINVAL;
715 break;
716 case 2:
717 if (channel != OMAP_DSS_CHANNEL_LCD3)
718 return -EINVAL;
719 break;
720 default:
721 return -EINVAL;
722 }
723
724 return 0;
725 }
726
dss_dpi_select_source(int port,enum omap_channel channel)727 int dss_dpi_select_source(int port, enum omap_channel channel)
728 {
729 return dss.feat->dpi_select_source(port, channel);
730 }
731
dss_get_clocks(void)732 static int dss_get_clocks(void)
733 {
734 struct clk *clk;
735
736 clk = devm_clk_get(&dss.pdev->dev, "fck");
737 if (IS_ERR(clk)) {
738 DSSERR("can't get clock fck\n");
739 return PTR_ERR(clk);
740 }
741
742 dss.dss_clk = clk;
743
744 if (dss.feat->parent_clk_name) {
745 clk = clk_get(NULL, dss.feat->parent_clk_name);
746 if (IS_ERR(clk)) {
747 DSSERR("Failed to get %s\n", dss.feat->parent_clk_name);
748 return PTR_ERR(clk);
749 }
750 } else {
751 clk = NULL;
752 }
753
754 dss.parent_clk = clk;
755
756 return 0;
757 }
758
dss_put_clocks(void)759 static void dss_put_clocks(void)
760 {
761 if (dss.parent_clk)
762 clk_put(dss.parent_clk);
763 }
764
dss_runtime_get(void)765 int dss_runtime_get(void)
766 {
767 int r;
768
769 DSSDBG("dss_runtime_get\n");
770
771 r = pm_runtime_resume_and_get(&dss.pdev->dev);
772 if (WARN_ON(r < 0))
773 return r;
774 return 0;
775 }
776
dss_runtime_put(void)777 void dss_runtime_put(void)
778 {
779 int r;
780
781 DSSDBG("dss_runtime_put\n");
782
783 r = pm_runtime_put_sync(&dss.pdev->dev);
784 WARN_ON(r < 0 && r != -ENOSYS && r != -EBUSY);
785 }
786
787 /* DEBUGFS */
788 #if defined(CONFIG_FB_OMAP2_DSS_DEBUGFS)
dss_debug_dump_clocks(struct seq_file * s)789 void dss_debug_dump_clocks(struct seq_file *s)
790 {
791 dss_dump_clocks(s);
792 dispc_dump_clocks(s);
793 #ifdef CONFIG_FB_OMAP2_DSS_DSI
794 dsi_dump_clocks(s);
795 #endif
796 }
797 #endif
798
799
800 static const enum omap_display_type omap2plus_ports[] = {
801 OMAP_DISPLAY_TYPE_DPI,
802 };
803
804 static const enum omap_display_type omap34xx_ports[] = {
805 OMAP_DISPLAY_TYPE_DPI,
806 OMAP_DISPLAY_TYPE_SDI,
807 };
808
809 static const enum omap_display_type dra7xx_ports[] = {
810 OMAP_DISPLAY_TYPE_DPI,
811 OMAP_DISPLAY_TYPE_DPI,
812 OMAP_DISPLAY_TYPE_DPI,
813 };
814
815 static const struct dss_features omap24xx_dss_feats = {
816 /*
817 * fck div max is really 16, but the divider range has gaps. The range
818 * from 1 to 6 has no gaps, so let's use that as a max.
819 */
820 .fck_div_max = 6,
821 .dss_fck_multiplier = 2,
822 .parent_clk_name = "core_ck",
823 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
824 .ports = omap2plus_ports,
825 .num_ports = ARRAY_SIZE(omap2plus_ports),
826 };
827
828 static const struct dss_features omap34xx_dss_feats = {
829 .fck_div_max = 16,
830 .dss_fck_multiplier = 2,
831 .parent_clk_name = "dpll4_ck",
832 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
833 .ports = omap34xx_ports,
834 .num_ports = ARRAY_SIZE(omap34xx_ports),
835 };
836
837 static const struct dss_features omap3630_dss_feats = {
838 .fck_div_max = 31,
839 .dss_fck_multiplier = 1,
840 .parent_clk_name = "dpll4_ck",
841 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
842 .ports = omap2plus_ports,
843 .num_ports = ARRAY_SIZE(omap2plus_ports),
844 };
845
846 static const struct dss_features omap44xx_dss_feats = {
847 .fck_div_max = 32,
848 .dss_fck_multiplier = 1,
849 .parent_clk_name = "dpll_per_x2_ck",
850 .dpi_select_source = &dss_dpi_select_source_omap4,
851 .ports = omap2plus_ports,
852 .num_ports = ARRAY_SIZE(omap2plus_ports),
853 };
854
855 static const struct dss_features omap54xx_dss_feats = {
856 .fck_div_max = 64,
857 .dss_fck_multiplier = 1,
858 .parent_clk_name = "dpll_per_x2_ck",
859 .dpi_select_source = &dss_dpi_select_source_omap5,
860 .ports = omap2plus_ports,
861 .num_ports = ARRAY_SIZE(omap2plus_ports),
862 };
863
864 static const struct dss_features am43xx_dss_feats = {
865 .fck_div_max = 0,
866 .dss_fck_multiplier = 0,
867 .parent_clk_name = NULL,
868 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
869 .ports = omap2plus_ports,
870 .num_ports = ARRAY_SIZE(omap2plus_ports),
871 };
872
873 static const struct dss_features dra7xx_dss_feats = {
874 .fck_div_max = 64,
875 .dss_fck_multiplier = 1,
876 .parent_clk_name = "dpll_per_x2_ck",
877 .dpi_select_source = &dss_dpi_select_source_dra7xx,
878 .ports = dra7xx_ports,
879 .num_ports = ARRAY_SIZE(dra7xx_ports),
880 };
881
dss_get_features(void)882 static const struct dss_features *dss_get_features(void)
883 {
884 switch (omapdss_get_version()) {
885 case OMAPDSS_VER_OMAP24xx:
886 return &omap24xx_dss_feats;
887
888 case OMAPDSS_VER_OMAP34xx_ES1:
889 case OMAPDSS_VER_OMAP34xx_ES3:
890 case OMAPDSS_VER_AM35xx:
891 return &omap34xx_dss_feats;
892
893 case OMAPDSS_VER_OMAP3630:
894 return &omap3630_dss_feats;
895
896 case OMAPDSS_VER_OMAP4430_ES1:
897 case OMAPDSS_VER_OMAP4430_ES2:
898 case OMAPDSS_VER_OMAP4:
899 return &omap44xx_dss_feats;
900
901 case OMAPDSS_VER_OMAP5:
902 return &omap54xx_dss_feats;
903
904 case OMAPDSS_VER_AM43xx:
905 return &am43xx_dss_feats;
906
907 case OMAPDSS_VER_DRA7xx:
908 return &dra7xx_dss_feats;
909
910 default:
911 return NULL;
912 }
913 }
914
915 static void dss_uninit_ports(struct platform_device *pdev);
916
dss_init_ports(struct platform_device * pdev)917 static int dss_init_ports(struct platform_device *pdev)
918 {
919 struct device_node *parent = pdev->dev.of_node;
920 struct device_node *port;
921 int r, ret = 0;
922
923 port = of_graph_get_next_port(parent, NULL);
924 if (!port)
925 return 0;
926
927 if (dss.feat->num_ports == 0)
928 return 0;
929
930 do {
931 enum omap_display_type port_type;
932 u32 reg;
933
934 r = of_property_read_u32(port, "reg", ®);
935 if (r)
936 reg = 0;
937
938 if (reg >= dss.feat->num_ports)
939 continue;
940
941 port_type = dss.feat->ports[reg];
942
943 switch (port_type) {
944 case OMAP_DISPLAY_TYPE_DPI:
945 ret = dpi_init_port(pdev, port);
946 break;
947 case OMAP_DISPLAY_TYPE_SDI:
948 ret = sdi_init_port(pdev, port);
949 break;
950 default:
951 break;
952 }
953
954 port = of_graph_get_next_port(parent, port);
955 } while (!ret && port);
956
957 if (ret)
958 dss_uninit_ports(pdev);
959
960 return ret;
961 }
962
dss_uninit_ports(struct platform_device * pdev)963 static void dss_uninit_ports(struct platform_device *pdev)
964 {
965 struct device_node *parent = pdev->dev.of_node;
966 struct device_node *port;
967
968 port = of_graph_get_next_port(parent, NULL);
969 if (!port)
970 return;
971
972 if (dss.feat->num_ports == 0)
973 return;
974
975 do {
976 enum omap_display_type port_type;
977 u32 reg;
978 int r;
979
980 r = of_property_read_u32(port, "reg", ®);
981 if (r)
982 reg = 0;
983
984 if (reg >= dss.feat->num_ports)
985 continue;
986
987 port_type = dss.feat->ports[reg];
988
989 switch (port_type) {
990 case OMAP_DISPLAY_TYPE_DPI:
991 dpi_uninit_port(port);
992 break;
993 case OMAP_DISPLAY_TYPE_SDI:
994 sdi_uninit_port(port);
995 break;
996 default:
997 break;
998 }
999
1000 port = of_graph_get_next_port(parent, port);
1001 } while (port);
1002 }
1003
dss_video_pll_probe(struct platform_device * pdev)1004 static int dss_video_pll_probe(struct platform_device *pdev)
1005 {
1006 struct device_node *np = pdev->dev.of_node;
1007 struct regulator *pll_regulator;
1008 int r;
1009
1010 if (!np)
1011 return 0;
1012
1013 if (of_property_read_bool(np, "syscon-pll-ctrl")) {
1014 dss.syscon_pll_ctrl = syscon_regmap_lookup_by_phandle(np,
1015 "syscon-pll-ctrl");
1016 if (IS_ERR(dss.syscon_pll_ctrl)) {
1017 dev_err(&pdev->dev,
1018 "failed to get syscon-pll-ctrl regmap\n");
1019 return PTR_ERR(dss.syscon_pll_ctrl);
1020 }
1021
1022 if (of_property_read_u32_index(np, "syscon-pll-ctrl", 1,
1023 &dss.syscon_pll_ctrl_offset)) {
1024 dev_err(&pdev->dev,
1025 "failed to get syscon-pll-ctrl offset\n");
1026 return -EINVAL;
1027 }
1028 }
1029
1030 pll_regulator = devm_regulator_get(&pdev->dev, "vdda_video");
1031 if (IS_ERR(pll_regulator)) {
1032 r = PTR_ERR(pll_regulator);
1033
1034 switch (r) {
1035 case -ENOENT:
1036 pll_regulator = NULL;
1037 break;
1038
1039 case -EPROBE_DEFER:
1040 return -EPROBE_DEFER;
1041
1042 default:
1043 DSSERR("can't get DPLL VDDA regulator\n");
1044 return r;
1045 }
1046 }
1047
1048 if (of_property_match_string(np, "reg-names", "pll1") >= 0) {
1049 dss.video1_pll = dss_video_pll_init(pdev, 0, pll_regulator);
1050 if (IS_ERR(dss.video1_pll))
1051 return PTR_ERR(dss.video1_pll);
1052 }
1053
1054 if (of_property_match_string(np, "reg-names", "pll2") >= 0) {
1055 dss.video2_pll = dss_video_pll_init(pdev, 1, pll_regulator);
1056 if (IS_ERR(dss.video2_pll)) {
1057 dss_video_pll_uninit(dss.video1_pll);
1058 return PTR_ERR(dss.video2_pll);
1059 }
1060 }
1061
1062 return 0;
1063 }
1064
1065 /* DSS HW IP initialisation */
dss_bind(struct device * dev)1066 static int dss_bind(struct device *dev)
1067 {
1068 struct platform_device *pdev = to_platform_device(dev);
1069 struct resource *dss_mem;
1070 u32 rev;
1071 int r;
1072
1073 dss.pdev = pdev;
1074
1075 dss.feat = dss_get_features();
1076 if (!dss.feat)
1077 return -ENODEV;
1078
1079 dss_mem = platform_get_resource(dss.pdev, IORESOURCE_MEM, 0);
1080 if (!dss_mem) {
1081 DSSERR("can't get IORESOURCE_MEM DSS\n");
1082 return -EINVAL;
1083 }
1084
1085 dss.base = devm_ioremap(&pdev->dev, dss_mem->start,
1086 resource_size(dss_mem));
1087 if (!dss.base) {
1088 DSSERR("can't ioremap DSS\n");
1089 return -ENOMEM;
1090 }
1091
1092 r = dss_get_clocks();
1093 if (r)
1094 return r;
1095
1096 r = dss_setup_default_clock();
1097 if (r)
1098 goto err_setup_clocks;
1099
1100 r = dss_video_pll_probe(pdev);
1101 if (r)
1102 goto err_pll_init;
1103
1104 r = dss_init_ports(pdev);
1105 if (r)
1106 goto err_init_ports;
1107
1108 pm_runtime_enable(&pdev->dev);
1109
1110 r = dss_runtime_get();
1111 if (r)
1112 goto err_runtime_get;
1113
1114 dss.dss_clk_rate = clk_get_rate(dss.dss_clk);
1115
1116 /* Select DPLL */
1117 REG_FLD_MOD(DSS_CONTROL, 0, 0, 0);
1118
1119 dss_select_dispc_clk_source(OMAP_DSS_CLK_SRC_FCK);
1120
1121 #ifdef CONFIG_FB_OMAP2_DSS_VENC
1122 REG_FLD_MOD(DSS_CONTROL, 1, 4, 4); /* venc dac demen */
1123 REG_FLD_MOD(DSS_CONTROL, 1, 3, 3); /* venc clock 4x enable */
1124 REG_FLD_MOD(DSS_CONTROL, 0, 2, 2); /* venc clock mode = normal */
1125 #endif
1126 dss.dsi_clk_source[0] = OMAP_DSS_CLK_SRC_FCK;
1127 dss.dsi_clk_source[1] = OMAP_DSS_CLK_SRC_FCK;
1128 dss.dispc_clk_source = OMAP_DSS_CLK_SRC_FCK;
1129 dss.lcd_clk_source[0] = OMAP_DSS_CLK_SRC_FCK;
1130 dss.lcd_clk_source[1] = OMAP_DSS_CLK_SRC_FCK;
1131
1132 rev = dss_read_reg(DSS_REVISION);
1133 printk(KERN_INFO "OMAP DSS rev %d.%d\n",
1134 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
1135
1136 dss_runtime_put();
1137
1138 r = component_bind_all(&pdev->dev, NULL);
1139 if (r)
1140 goto err_component;
1141
1142 dss_debugfs_create_file("dss", dss_dump_regs);
1143
1144 pm_set_vt_switch(0);
1145
1146 dss_initialized = true;
1147
1148 return 0;
1149
1150 err_component:
1151 err_runtime_get:
1152 pm_runtime_disable(&pdev->dev);
1153 dss_uninit_ports(pdev);
1154 err_init_ports:
1155 if (dss.video1_pll)
1156 dss_video_pll_uninit(dss.video1_pll);
1157
1158 if (dss.video2_pll)
1159 dss_video_pll_uninit(dss.video2_pll);
1160 err_pll_init:
1161 err_setup_clocks:
1162 dss_put_clocks();
1163 return r;
1164 }
1165
dss_unbind(struct device * dev)1166 static void dss_unbind(struct device *dev)
1167 {
1168 struct platform_device *pdev = to_platform_device(dev);
1169
1170 dss_initialized = false;
1171
1172 component_unbind_all(&pdev->dev, NULL);
1173
1174 if (dss.video1_pll)
1175 dss_video_pll_uninit(dss.video1_pll);
1176
1177 if (dss.video2_pll)
1178 dss_video_pll_uninit(dss.video2_pll);
1179
1180 dss_uninit_ports(pdev);
1181
1182 pm_runtime_disable(&pdev->dev);
1183
1184 dss_put_clocks();
1185 }
1186
1187 static const struct component_master_ops dss_component_ops = {
1188 .bind = dss_bind,
1189 .unbind = dss_unbind,
1190 };
1191
dss_add_child_component(struct device * dev,void * data)1192 static int dss_add_child_component(struct device *dev, void *data)
1193 {
1194 struct component_match **match = data;
1195
1196 /*
1197 * HACK
1198 * We don't have a working driver for rfbi, so skip it here always.
1199 * Otherwise dss will never get probed successfully, as it will wait
1200 * for rfbi to get probed.
1201 */
1202 if (strstr(dev_name(dev), "rfbi"))
1203 return 0;
1204
1205 component_match_add(dev->parent, match, component_compare_dev, dev);
1206
1207 return 0;
1208 }
1209
dss_probe(struct platform_device * pdev)1210 static int dss_probe(struct platform_device *pdev)
1211 {
1212 struct component_match *match = NULL;
1213 int r;
1214
1215 /* add all the child devices as components */
1216 device_for_each_child(&pdev->dev, &match, dss_add_child_component);
1217
1218 r = component_master_add_with_match(&pdev->dev, &dss_component_ops, match);
1219 if (r)
1220 return r;
1221
1222 return 0;
1223 }
1224
dss_remove(struct platform_device * pdev)1225 static void dss_remove(struct platform_device *pdev)
1226 {
1227 component_master_del(&pdev->dev, &dss_component_ops);
1228 }
1229
dss_runtime_suspend(struct device * dev)1230 static int dss_runtime_suspend(struct device *dev)
1231 {
1232 dss_save_context();
1233 dss_set_min_bus_tput(dev, 0);
1234
1235 pinctrl_pm_select_sleep_state(dev);
1236
1237 return 0;
1238 }
1239
dss_runtime_resume(struct device * dev)1240 static int dss_runtime_resume(struct device *dev)
1241 {
1242 int r;
1243
1244 pinctrl_pm_select_default_state(dev);
1245
1246 /*
1247 * Set an arbitrarily high tput request to ensure OPP100.
1248 * What we should really do is to make a request to stay in OPP100,
1249 * without any tput requirements, but that is not currently possible
1250 * via the PM layer.
1251 */
1252
1253 r = dss_set_min_bus_tput(dev, 1000000000);
1254 if (r)
1255 return r;
1256
1257 dss_restore_context();
1258 return 0;
1259 }
1260
1261 static const struct dev_pm_ops dss_pm_ops = {
1262 .runtime_suspend = dss_runtime_suspend,
1263 .runtime_resume = dss_runtime_resume,
1264 };
1265
1266 static const struct of_device_id dss_of_match[] = {
1267 { .compatible = "ti,omap2-dss", },
1268 { .compatible = "ti,omap3-dss", },
1269 { .compatible = "ti,omap4-dss", },
1270 { .compatible = "ti,omap5-dss", },
1271 { .compatible = "ti,dra7-dss", },
1272 {},
1273 };
1274
1275 MODULE_DEVICE_TABLE(of, dss_of_match);
1276
1277 static struct platform_driver omap_dsshw_driver = {
1278 .probe = dss_probe,
1279 .remove = dss_remove,
1280 .driver = {
1281 .name = "omapdss_dss",
1282 .pm = &dss_pm_ops,
1283 .of_match_table = dss_of_match,
1284 .suppress_bind_attrs = true,
1285 },
1286 };
1287
dss_init_platform_driver(void)1288 int __init dss_init_platform_driver(void)
1289 {
1290 return platform_driver_register(&omap_dsshw_driver);
1291 }
1292
dss_uninit_platform_driver(void)1293 void dss_uninit_platform_driver(void)
1294 {
1295 platform_driver_unregister(&omap_dsshw_driver);
1296 }
1297