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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / gpu / drm / omapdrm / dss / dss.c
blob225ec808b01a980254afa72cd287286cca10bd44
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/gfp.h>
26 #include <linux/sizes.h>
27 #include <linux/mfd/syscon.h>
28 #include <linux/regmap.h>
29 #include <linux/of.h>
30 #include <linux/of_device.h>
31 #include <linux/of_graph.h>
32 #include <linux/regulator/consumer.h>
33 #include <linux/suspend.h>
34 #include <linux/component.h>
35 #include <linux/sys_soc.h>
36
37 #include "omapdss.h"
38 #include "dss.h"
39
40 struct dss_reg {
41 u16 idx;
42 };
43
44 #define DSS_REG(idx) ((const struct dss_reg) { idx })
45
46 #define DSS_REVISION DSS_REG(0x0000)
47 #define DSS_SYSCONFIG DSS_REG(0x0010)
48 #define DSS_SYSSTATUS DSS_REG(0x0014)
49 #define DSS_CONTROL DSS_REG(0x0040)
50 #define DSS_SDI_CONTROL DSS_REG(0x0044)
51 #define DSS_PLL_CONTROL DSS_REG(0x0048)
52 #define DSS_SDI_STATUS DSS_REG(0x005C)
53
54 #define REG_GET(dss, idx, start, end) \
55 FLD_GET(dss_read_reg(dss, idx), start, end)
56
57 #define REG_FLD_MOD(dss, idx, val, start, end) \
58 dss_write_reg(dss, idx, \
59 FLD_MOD(dss_read_reg(dss, idx), val, start, end))
60
61 struct dss_ops {
62 int (*dpi_select_source)(struct dss_device *dss, int port,
63 enum omap_channel channel);
64 int (*select_lcd_source)(struct dss_device *dss,
65 enum omap_channel channel,
66 enum dss_clk_source clk_src);
67 };
68
69 struct dss_features {
70 enum dss_model model;
71 u8 fck_div_max;
72 unsigned int fck_freq_max;
73 u8 dss_fck_multiplier;
74 const char *parent_clk_name;
75 const enum omap_display_type *ports;
76 int num_ports;
77 const enum omap_dss_output_id *outputs;
78 const struct dss_ops *ops;
79 struct dss_reg_field dispc_clk_switch;
80 bool has_lcd_clk_src;
81 };
82
83 static const char * const dss_generic_clk_source_names[] = {
84 [DSS_CLK_SRC_FCK] = "FCK",
85 [DSS_CLK_SRC_PLL1_1] = "PLL1:1",
86 [DSS_CLK_SRC_PLL1_2] = "PLL1:2",
87 [DSS_CLK_SRC_PLL1_3] = "PLL1:3",
88 [DSS_CLK_SRC_PLL2_1] = "PLL2:1",
89 [DSS_CLK_SRC_PLL2_2] = "PLL2:2",
90 [DSS_CLK_SRC_PLL2_3] = "PLL2:3",
91 [DSS_CLK_SRC_HDMI_PLL] = "HDMI PLL",
92 };
93
94 static inline void dss_write_reg(struct dss_device *dss,
95 const struct dss_reg idx, u32 val)
96 {
97 __raw_writel(val, dss->base + idx.idx);
98 }
99
100 static inline u32 dss_read_reg(struct dss_device *dss, const struct dss_reg idx)
101 {
102 return __raw_readl(dss->base + idx.idx);
103 }
104
105 #define SR(dss, reg) \
106 dss->ctx[(DSS_##reg).idx / sizeof(u32)] = dss_read_reg(dss, DSS_##reg)
107 #define RR(dss, reg) \
108 dss_write_reg(dss, DSS_##reg, dss->ctx[(DSS_##reg).idx / sizeof(u32)])
109
110 static void dss_save_context(struct dss_device *dss)
111 {
112 DSSDBG("dss_save_context\n");
113
114 SR(dss, CONTROL);
115
116 if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) {
117 SR(dss, SDI_CONTROL);
118 SR(dss, PLL_CONTROL);
119 }
120
121 dss->ctx_valid = true;
122
123 DSSDBG("context saved\n");
124 }
125
126 static void dss_restore_context(struct dss_device *dss)
127 {
128 DSSDBG("dss_restore_context\n");
129
130 if (!dss->ctx_valid)
131 return;
132
133 RR(dss, CONTROL);
134
135 if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) {
136 RR(dss, SDI_CONTROL);
137 RR(dss, PLL_CONTROL);
138 }
139
140 DSSDBG("context restored\n");
141 }
142
143 #undef SR
144 #undef RR
145
146 void dss_ctrl_pll_enable(struct dss_pll *pll, bool enable)
147 {
148 unsigned int shift;
149 unsigned int val;
150
151 if (!pll->dss->syscon_pll_ctrl)
152 return;
153
154 val = !enable;
155
156 switch (pll->id) {
157 case DSS_PLL_VIDEO1:
158 shift = 0;
159 break;
160 case DSS_PLL_VIDEO2:
161 shift = 1;
162 break;
163 case DSS_PLL_HDMI:
164 shift = 2;
165 break;
166 default:
167 DSSERR("illegal DSS PLL ID %d\n", pll->id);
168 return;
169 }
170
171 regmap_update_bits(pll->dss->syscon_pll_ctrl,
172 pll->dss->syscon_pll_ctrl_offset,
173 1 << shift, val << shift);
174 }
175
176 static int dss_ctrl_pll_set_control_mux(struct dss_device *dss,
177 enum dss_clk_source clk_src,
178 enum omap_channel channel)
179 {
180 unsigned int shift, val;
181
182 if (!dss->syscon_pll_ctrl)
183 return -EINVAL;
184
185 switch (channel) {
186 case OMAP_DSS_CHANNEL_LCD:
187 shift = 3;
188
189 switch (clk_src) {
190 case DSS_CLK_SRC_PLL1_1:
191 val = 0; break;
192 case DSS_CLK_SRC_HDMI_PLL:
193 val = 1; break;
194 default:
195 DSSERR("error in PLL mux config for LCD\n");
196 return -EINVAL;
197 }
198
199 break;
200 case OMAP_DSS_CHANNEL_LCD2:
201 shift = 5;
202
203 switch (clk_src) {
204 case DSS_CLK_SRC_PLL1_3:
205 val = 0; break;
206 case DSS_CLK_SRC_PLL2_3:
207 val = 1; break;
208 case DSS_CLK_SRC_HDMI_PLL:
209 val = 2; break;
210 default:
211 DSSERR("error in PLL mux config for LCD2\n");
212 return -EINVAL;
213 }
214
215 break;
216 case OMAP_DSS_CHANNEL_LCD3:
217 shift = 7;
218
219 switch (clk_src) {
220 case DSS_CLK_SRC_PLL2_1:
221 val = 0; break;
222 case DSS_CLK_SRC_PLL1_3:
223 val = 1; break;
224 case DSS_CLK_SRC_HDMI_PLL:
225 val = 2; break;
226 default:
227 DSSERR("error in PLL mux config for LCD3\n");
228 return -EINVAL;
229 }
230
231 break;
232 default:
233 DSSERR("error in PLL mux config\n");
234 return -EINVAL;
235 }
236
237 regmap_update_bits(dss->syscon_pll_ctrl, dss->syscon_pll_ctrl_offset,
238 0x3 << shift, val << shift);
239
240 return 0;
241 }
242
243 void dss_sdi_init(struct dss_device *dss, int datapairs)
244 {
245 u32 l;
246
247 BUG_ON(datapairs > 3 || datapairs < 1);
248
249 l = dss_read_reg(dss, DSS_SDI_CONTROL);
250 l = FLD_MOD(l, 0xf, 19, 15); /* SDI_PDIV */
251 l = FLD_MOD(l, datapairs-1, 3, 2); /* SDI_PRSEL */
252 l = FLD_MOD(l, 2, 1, 0); /* SDI_BWSEL */
253 dss_write_reg(dss, DSS_SDI_CONTROL, l);
254
255 l = dss_read_reg(dss, DSS_PLL_CONTROL);
256 l = FLD_MOD(l, 0x7, 25, 22); /* SDI_PLL_FREQSEL */
257 l = FLD_MOD(l, 0xb, 16, 11); /* SDI_PLL_REGN */
258 l = FLD_MOD(l, 0xb4, 10, 1); /* SDI_PLL_REGM */
259 dss_write_reg(dss, DSS_PLL_CONTROL, l);
260 }
261
262 int dss_sdi_enable(struct dss_device *dss)
263 {
264 unsigned long timeout;
265
266 dispc_pck_free_enable(dss->dispc, 1);
267
268 /* Reset SDI PLL */
269 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 1, 18, 18); /* SDI_PLL_SYSRESET */
270 udelay(1); /* wait 2x PCLK */
271
272 /* Lock SDI PLL */
273 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 1, 28, 28); /* SDI_PLL_GOBIT */
274
275 /* Waiting for PLL lock request to complete */
276 timeout = jiffies + msecs_to_jiffies(500);
277 while (dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 6)) {
278 if (time_after_eq(jiffies, timeout)) {
279 DSSERR("PLL lock request timed out\n");
280 goto err1;
281 }
282 }
283
284 /* Clearing PLL_GO bit */
285 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 28, 28);
286
287 /* Waiting for PLL to lock */
288 timeout = jiffies + msecs_to_jiffies(500);
289 while (!(dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 5))) {
290 if (time_after_eq(jiffies, timeout)) {
291 DSSERR("PLL lock timed out\n");
292 goto err1;
293 }
294 }
295
296 dispc_lcd_enable_signal(dss->dispc, 1);
297
298 /* Waiting for SDI reset to complete */
299 timeout = jiffies + msecs_to_jiffies(500);
300 while (!(dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 2))) {
301 if (time_after_eq(jiffies, timeout)) {
302 DSSERR("SDI reset timed out\n");
303 goto err2;
304 }
305 }
306
307 return 0;
308
309 err2:
310 dispc_lcd_enable_signal(dss->dispc, 0);
311 err1:
312 /* Reset SDI PLL */
313 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
314
315 dispc_pck_free_enable(dss->dispc, 0);
316
317 return -ETIMEDOUT;
318 }
319
320 void dss_sdi_disable(struct dss_device *dss)
321 {
322 dispc_lcd_enable_signal(dss->dispc, 0);
323
324 dispc_pck_free_enable(dss->dispc, 0);
325
326 /* Reset SDI PLL */
327 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
328 }
329
330 const char *dss_get_clk_source_name(enum dss_clk_source clk_src)
331 {
332 return dss_generic_clk_source_names[clk_src];
333 }
334
335 static void dss_dump_clocks(struct dss_device *dss, struct seq_file *s)
336 {
337 const char *fclk_name;
338 unsigned long fclk_rate;
339
340 if (dss_runtime_get(dss))
341 return;
342
343 seq_printf(s, "- DSS -\n");
344
345 fclk_name = dss_get_clk_source_name(DSS_CLK_SRC_FCK);
346 fclk_rate = clk_get_rate(dss->dss_clk);
347
348 seq_printf(s, "%s = %lu\n",
349 fclk_name,
350 fclk_rate);
351
352 dss_runtime_put(dss);
353 }
354
355 static int dss_dump_regs(struct seq_file *s, void *p)
356 {
357 struct dss_device *dss = s->private;
358
359 #define DUMPREG(dss, r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(dss, r))
360
361 if (dss_runtime_get(dss))
362 return 0;
363
364 DUMPREG(dss, DSS_REVISION);
365 DUMPREG(dss, DSS_SYSCONFIG);
366 DUMPREG(dss, DSS_SYSSTATUS);
367 DUMPREG(dss, DSS_CONTROL);
368
369 if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) {
370 DUMPREG(dss, DSS_SDI_CONTROL);
371 DUMPREG(dss, DSS_PLL_CONTROL);
372 DUMPREG(dss, DSS_SDI_STATUS);
373 }
374
375 dss_runtime_put(dss);
376 #undef DUMPREG
377 return 0;
378 }
379
380 static int dss_debug_dump_clocks(struct seq_file *s, void *p)
381 {
382 struct dss_device *dss = s->private;
383
384 dss_dump_clocks(dss, s);
385 dispc_dump_clocks(dss->dispc, s);
386 return 0;
387 }
388
389 static int dss_get_channel_index(enum omap_channel channel)
390 {
391 switch (channel) {
392 case OMAP_DSS_CHANNEL_LCD:
393 return 0;
394 case OMAP_DSS_CHANNEL_LCD2:
395 return 1;
396 case OMAP_DSS_CHANNEL_LCD3:
397 return 2;
398 default:
399 WARN_ON(1);
400 return 0;
401 }
402 }
403
404 static void dss_select_dispc_clk_source(struct dss_device *dss,
405 enum dss_clk_source clk_src)
406 {
407 int b;
408
409 /*
410 * We always use PRCM clock as the DISPC func clock, except on DSS3,
411 * where we don't have separate DISPC and LCD clock sources.
412 */
413 if (WARN_ON(dss->feat->has_lcd_clk_src && clk_src != DSS_CLK_SRC_FCK))
414 return;
415
416 switch (clk_src) {
417 case DSS_CLK_SRC_FCK:
418 b = 0;
419 break;
420 case DSS_CLK_SRC_PLL1_1:
421 b = 1;
422 break;
423 case DSS_CLK_SRC_PLL2_1:
424 b = 2;
425 break;
426 default:
427 BUG();
428 return;
429 }
430
431 REG_FLD_MOD(dss, DSS_CONTROL, b, /* DISPC_CLK_SWITCH */
432 dss->feat->dispc_clk_switch.start,
433 dss->feat->dispc_clk_switch.end);
434
435 dss->dispc_clk_source = clk_src;
436 }
437
438 void dss_select_dsi_clk_source(struct dss_device *dss, int dsi_module,
439 enum dss_clk_source clk_src)
440 {
441 int b, pos;
442
443 switch (clk_src) {
444 case DSS_CLK_SRC_FCK:
445 b = 0;
446 break;
447 case DSS_CLK_SRC_PLL1_2:
448 BUG_ON(dsi_module != 0);
449 b = 1;
450 break;
451 case DSS_CLK_SRC_PLL2_2:
452 BUG_ON(dsi_module != 1);
453 b = 1;
454 break;
455 default:
456 BUG();
457 return;
458 }
459
460 pos = dsi_module == 0 ? 1 : 10;
461 REG_FLD_MOD(dss, DSS_CONTROL, b, pos, pos); /* DSIx_CLK_SWITCH */
462
463 dss->dsi_clk_source[dsi_module] = clk_src;
464 }
465
466 static int dss_lcd_clk_mux_dra7(struct dss_device *dss,
467 enum omap_channel channel,
468 enum dss_clk_source clk_src)
469 {
470 const u8 ctrl_bits[] = {
471 [OMAP_DSS_CHANNEL_LCD] = 0,
472 [OMAP_DSS_CHANNEL_LCD2] = 12,
473 [OMAP_DSS_CHANNEL_LCD3] = 19,
474 };
475
476 u8 ctrl_bit = ctrl_bits[channel];
477 int r;
478
479 if (clk_src == DSS_CLK_SRC_FCK) {
480 /* LCDx_CLK_SWITCH */
481 REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
482 return -EINVAL;
483 }
484
485 r = dss_ctrl_pll_set_control_mux(dss, clk_src, channel);
486 if (r)
487 return r;
488
489 REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
490
491 return 0;
492 }
493
494 static int dss_lcd_clk_mux_omap5(struct dss_device *dss,
495 enum omap_channel channel,
496 enum dss_clk_source clk_src)
497 {
498 const u8 ctrl_bits[] = {
499 [OMAP_DSS_CHANNEL_LCD] = 0,
500 [OMAP_DSS_CHANNEL_LCD2] = 12,
501 [OMAP_DSS_CHANNEL_LCD3] = 19,
502 };
503 const enum dss_clk_source allowed_plls[] = {
504 [OMAP_DSS_CHANNEL_LCD] = DSS_CLK_SRC_PLL1_1,
505 [OMAP_DSS_CHANNEL_LCD2] = DSS_CLK_SRC_FCK,
506 [OMAP_DSS_CHANNEL_LCD3] = DSS_CLK_SRC_PLL2_1,
507 };
508
509 u8 ctrl_bit = ctrl_bits[channel];
510
511 if (clk_src == DSS_CLK_SRC_FCK) {
512 /* LCDx_CLK_SWITCH */
513 REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
514 return -EINVAL;
515 }
516
517 if (WARN_ON(allowed_plls[channel] != clk_src))
518 return -EINVAL;
519
520 REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
521
522 return 0;
523 }
524
525 static int dss_lcd_clk_mux_omap4(struct dss_device *dss,
526 enum omap_channel channel,
527 enum dss_clk_source clk_src)
528 {
529 const u8 ctrl_bits[] = {
530 [OMAP_DSS_CHANNEL_LCD] = 0,
531 [OMAP_DSS_CHANNEL_LCD2] = 12,
532 };
533 const enum dss_clk_source allowed_plls[] = {
534 [OMAP_DSS_CHANNEL_LCD] = DSS_CLK_SRC_PLL1_1,
535 [OMAP_DSS_CHANNEL_LCD2] = DSS_CLK_SRC_PLL2_1,
536 };
537
538 u8 ctrl_bit = ctrl_bits[channel];
539
540 if (clk_src == DSS_CLK_SRC_FCK) {
541 /* LCDx_CLK_SWITCH */
542 REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
543 return 0;
544 }
545
546 if (WARN_ON(allowed_plls[channel] != clk_src))
547 return -EINVAL;
548
549 REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
550
551 return 0;
552 }
553
554 void dss_select_lcd_clk_source(struct dss_device *dss,
555 enum omap_channel channel,
556 enum dss_clk_source clk_src)
557 {
558 int idx = dss_get_channel_index(channel);
559 int r;
560
561 if (!dss->feat->has_lcd_clk_src) {
562 dss_select_dispc_clk_source(dss, clk_src);
563 dss->lcd_clk_source[idx] = clk_src;
564 return;
565 }
566
567 r = dss->feat->ops->select_lcd_source(dss, channel, clk_src);
568 if (r)
569 return;
570
571 dss->lcd_clk_source[idx] = clk_src;
572 }
573
574 enum dss_clk_source dss_get_dispc_clk_source(struct dss_device *dss)
575 {
576 return dss->dispc_clk_source;
577 }
578
579 enum dss_clk_source dss_get_dsi_clk_source(struct dss_device *dss,
580 int dsi_module)
581 {
582 return dss->dsi_clk_source[dsi_module];
583 }
584
585 enum dss_clk_source dss_get_lcd_clk_source(struct dss_device *dss,
586 enum omap_channel channel)
587 {
588 if (dss->feat->has_lcd_clk_src) {
589 int idx = dss_get_channel_index(channel);
590 return dss->lcd_clk_source[idx];
591 } else {
592 /* LCD_CLK source is the same as DISPC_FCLK source for
593 * OMAP2 and OMAP3 */
594 return dss->dispc_clk_source;
595 }
596 }
597
598 bool dss_div_calc(struct dss_device *dss, unsigned long pck,
599 unsigned long fck_min, dss_div_calc_func func, void *data)
600 {
601 int fckd, fckd_start, fckd_stop;
602 unsigned long fck;
603 unsigned long fck_hw_max;
604 unsigned long fckd_hw_max;
605 unsigned long prate;
606 unsigned int m;
607
608 fck_hw_max = dss->feat->fck_freq_max;
609
610 if (dss->parent_clk == NULL) {
611 unsigned int pckd;
612
613 pckd = fck_hw_max / pck;
614
615 fck = pck * pckd;
616
617 fck = clk_round_rate(dss->dss_clk, fck);
618
619 return func(fck, data);
620 }
621
622 fckd_hw_max = dss->feat->fck_div_max;
623
624 m = dss->feat->dss_fck_multiplier;
625 prate = clk_get_rate(dss->parent_clk);
626
627 fck_min = fck_min ? fck_min : 1;
628
629 fckd_start = min(prate * m / fck_min, fckd_hw_max);
630 fckd_stop = max(DIV_ROUND_UP(prate * m, fck_hw_max), 1ul);
631
632 for (fckd = fckd_start; fckd >= fckd_stop; --fckd) {
633 fck = DIV_ROUND_UP(prate, fckd) * m;
634
635 if (func(fck, data))
636 return true;
637 }
638
639 return false;
640 }
641
642 int dss_set_fck_rate(struct dss_device *dss, unsigned long rate)
643 {
644 int r;
645
646 DSSDBG("set fck to %lu\n", rate);
647
648 r = clk_set_rate(dss->dss_clk, rate);
649 if (r)
650 return r;
651
652 dss->dss_clk_rate = clk_get_rate(dss->dss_clk);
653
654 WARN_ONCE(dss->dss_clk_rate != rate, "clk rate mismatch: %lu != %lu",
655 dss->dss_clk_rate, rate);
656
657 return 0;
658 }
659
660 unsigned long dss_get_dispc_clk_rate(struct dss_device *dss)
661 {
662 return dss->dss_clk_rate;
663 }
664
665 unsigned long dss_get_max_fck_rate(struct dss_device *dss)
666 {
667 return dss->feat->fck_freq_max;
668 }
669
670 static int dss_setup_default_clock(struct dss_device *dss)
671 {
672 unsigned long max_dss_fck, prate;
673 unsigned long fck;
674 unsigned int fck_div;
675 int r;
676
677 max_dss_fck = dss->feat->fck_freq_max;
678
679 if (dss->parent_clk == NULL) {
680 fck = clk_round_rate(dss->dss_clk, max_dss_fck);
681 } else {
682 prate = clk_get_rate(dss->parent_clk);
683
684 fck_div = DIV_ROUND_UP(prate * dss->feat->dss_fck_multiplier,
685 max_dss_fck);
686 fck = DIV_ROUND_UP(prate, fck_div)
687 * dss->feat->dss_fck_multiplier;
688 }
689
690 r = dss_set_fck_rate(dss, fck);
691 if (r)
692 return r;
693
694 return 0;
695 }
696
697 void dss_set_venc_output(struct dss_device *dss, enum omap_dss_venc_type type)
698 {
699 int l = 0;
700
701 if (type == OMAP_DSS_VENC_TYPE_COMPOSITE)
702 l = 0;
703 else if (type == OMAP_DSS_VENC_TYPE_SVIDEO)
704 l = 1;
705 else
706 BUG();
707
708 /* venc out selection. 0 = comp, 1 = svideo */
709 REG_FLD_MOD(dss, DSS_CONTROL, l, 6, 6);
710 }
711
712 void dss_set_dac_pwrdn_bgz(struct dss_device *dss, bool enable)
713 {
714 /* DAC Power-Down Control */
715 REG_FLD_MOD(dss, DSS_CONTROL, enable, 5, 5);
716 }
717
718 void dss_select_hdmi_venc_clk_source(struct dss_device *dss,
719 enum dss_hdmi_venc_clk_source_select src)
720 {
721 enum omap_dss_output_id outputs;
722
723 outputs = dss->feat->outputs[OMAP_DSS_CHANNEL_DIGIT];
724
725 /* Complain about invalid selections */
726 WARN_ON((src == DSS_VENC_TV_CLK) && !(outputs & OMAP_DSS_OUTPUT_VENC));
727 WARN_ON((src == DSS_HDMI_M_PCLK) && !(outputs & OMAP_DSS_OUTPUT_HDMI));
728
729 /* Select only if we have options */
730 if ((outputs & OMAP_DSS_OUTPUT_VENC) &&
731 (outputs & OMAP_DSS_OUTPUT_HDMI))
732 /* VENC_HDMI_SWITCH */
733 REG_FLD_MOD(dss, DSS_CONTROL, src, 15, 15);
734 }
735
736 static int dss_dpi_select_source_omap2_omap3(struct dss_device *dss, int port,
737 enum omap_channel channel)
738 {
739 if (channel != OMAP_DSS_CHANNEL_LCD)
740 return -EINVAL;
741
742 return 0;
743 }
744
745 static int dss_dpi_select_source_omap4(struct dss_device *dss, int port,
746 enum omap_channel channel)
747 {
748 int val;
749
750 switch (channel) {
751 case OMAP_DSS_CHANNEL_LCD2:
752 val = 0;
753 break;
754 case OMAP_DSS_CHANNEL_DIGIT:
755 val = 1;
756 break;
757 default:
758 return -EINVAL;
759 }
760
761 REG_FLD_MOD(dss, DSS_CONTROL, val, 17, 17);
762
763 return 0;
764 }
765
766 static int dss_dpi_select_source_omap5(struct dss_device *dss, int port,
767 enum omap_channel channel)
768 {
769 int val;
770
771 switch (channel) {
772 case OMAP_DSS_CHANNEL_LCD:
773 val = 1;
774 break;
775 case OMAP_DSS_CHANNEL_LCD2:
776 val = 2;
777 break;
778 case OMAP_DSS_CHANNEL_LCD3:
779 val = 3;
780 break;
781 case OMAP_DSS_CHANNEL_DIGIT:
782 val = 0;
783 break;
784 default:
785 return -EINVAL;
786 }
787
788 REG_FLD_MOD(dss, DSS_CONTROL, val, 17, 16);
789
790 return 0;
791 }
792
793 static int dss_dpi_select_source_dra7xx(struct dss_device *dss, int port,
794 enum omap_channel channel)
795 {
796 switch (port) {
797 case 0:
798 return dss_dpi_select_source_omap5(dss, port, channel);
799 case 1:
800 if (channel != OMAP_DSS_CHANNEL_LCD2)
801 return -EINVAL;
802 break;
803 case 2:
804 if (channel != OMAP_DSS_CHANNEL_LCD3)
805 return -EINVAL;
806 break;
807 default:
808 return -EINVAL;
809 }
810
811 return 0;
812 }
813
814 int dss_dpi_select_source(struct dss_device *dss, int port,
815 enum omap_channel channel)
816 {
817 return dss->feat->ops->dpi_select_source(dss, port, channel);
818 }
819
820 static int dss_get_clocks(struct dss_device *dss)
821 {
822 struct clk *clk;
823
824 clk = devm_clk_get(&dss->pdev->dev, "fck");
825 if (IS_ERR(clk)) {
826 DSSERR("can't get clock fck\n");
827 return PTR_ERR(clk);
828 }
829
830 dss->dss_clk = clk;
831
832 if (dss->feat->parent_clk_name) {
833 clk = clk_get(NULL, dss->feat->parent_clk_name);
834 if (IS_ERR(clk)) {
835 DSSERR("Failed to get %s\n",
836 dss->feat->parent_clk_name);
837 return PTR_ERR(clk);
838 }
839 } else {
840 clk = NULL;
841 }
842
843 dss->parent_clk = clk;
844
845 return 0;
846 }
847
848 static void dss_put_clocks(struct dss_device *dss)
849 {
850 if (dss->parent_clk)
851 clk_put(dss->parent_clk);
852 }
853
854 int dss_runtime_get(struct dss_device *dss)
855 {
856 int r;
857
858 DSSDBG("dss_runtime_get\n");
859
860 r = pm_runtime_get_sync(&dss->pdev->dev);
861 WARN_ON(r < 0);
862 return r < 0 ? r : 0;
863 }
864
865 void dss_runtime_put(struct dss_device *dss)
866 {
867 int r;
868
869 DSSDBG("dss_runtime_put\n");
870
871 r = pm_runtime_put_sync(&dss->pdev->dev);
872 WARN_ON(r < 0 && r != -ENOSYS && r != -EBUSY);
873 }
874
875 struct dss_device *dss_get_device(struct device *dev)
876 {
877 return dev_get_drvdata(dev);
878 }
879
880 /* DEBUGFS */
881 #if defined(CONFIG_OMAP2_DSS_DEBUGFS)
882 static int dss_initialize_debugfs(struct dss_device *dss)
883 {
884 struct dentry *dir;
885
886 dir = debugfs_create_dir("omapdss", NULL);
887 if (IS_ERR(dir))
888 return PTR_ERR(dir);
889
890 dss->debugfs.root = dir;
891
892 return 0;
893 }
894
895 static void dss_uninitialize_debugfs(struct dss_device *dss)
896 {
897 debugfs_remove_recursive(dss->debugfs.root);
898 }
899
900 struct dss_debugfs_entry {
901 struct dentry *dentry;
902 int (*show_fn)(struct seq_file *s, void *data);
903 void *data;
904 };
905
906 static int dss_debug_open(struct inode *inode, struct file *file)
907 {
908 struct dss_debugfs_entry *entry = inode->i_private;
909
910 return single_open(file, entry->show_fn, entry->data);
911 }
912
913 static const struct file_operations dss_debug_fops = {
914 .open = dss_debug_open,
915 .read = seq_read,
916 .llseek = seq_lseek,
917 .release = single_release,
918 };
919
920 struct dss_debugfs_entry *
921 dss_debugfs_create_file(struct dss_device *dss, const char *name,
922 int (*show_fn)(struct seq_file *s, void *data),
923 void *data)
924 {
925 struct dss_debugfs_entry *entry;
926
927 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
928 if (!entry)
929 return ERR_PTR(-ENOMEM);
930
931 entry->show_fn = show_fn;
932 entry->data = data;
933 entry->dentry = debugfs_create_file(name, 0444, dss->debugfs.root,
934 entry, &dss_debug_fops);
935
936 return entry;
937 }
938
939 void dss_debugfs_remove_file(struct dss_debugfs_entry *entry)
940 {
941 if (IS_ERR_OR_NULL(entry))
942 return;
943
944 debugfs_remove(entry->dentry);
945 kfree(entry);
946 }
947
948 #else /* CONFIG_OMAP2_DSS_DEBUGFS */
949 static inline int dss_initialize_debugfs(struct dss_device *dss)
950 {
951 return 0;
952 }
953 static inline void dss_uninitialize_debugfs(struct dss_device *dss)
954 {
955 }
956 #endif /* CONFIG_OMAP2_DSS_DEBUGFS */
957
958 static const struct dss_ops dss_ops_omap2_omap3 = {
959 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
960 };
961
962 static const struct dss_ops dss_ops_omap4 = {
963 .dpi_select_source = &dss_dpi_select_source_omap4,
964 .select_lcd_source = &dss_lcd_clk_mux_omap4,
965 };
966
967 static const struct dss_ops dss_ops_omap5 = {
968 .dpi_select_source = &dss_dpi_select_source_omap5,
969 .select_lcd_source = &dss_lcd_clk_mux_omap5,
970 };
971
972 static const struct dss_ops dss_ops_dra7 = {
973 .dpi_select_source = &dss_dpi_select_source_dra7xx,
974 .select_lcd_source = &dss_lcd_clk_mux_dra7,
975 };
976
977 static const enum omap_display_type omap2plus_ports[] = {
978 OMAP_DISPLAY_TYPE_DPI,
979 };
980
981 static const enum omap_display_type omap34xx_ports[] = {
982 OMAP_DISPLAY_TYPE_DPI,
983 OMAP_DISPLAY_TYPE_SDI,
984 };
985
986 static const enum omap_display_type dra7xx_ports[] = {
987 OMAP_DISPLAY_TYPE_DPI,
988 OMAP_DISPLAY_TYPE_DPI,
989 OMAP_DISPLAY_TYPE_DPI,
990 };
991
992 static const enum omap_dss_output_id omap2_dss_supported_outputs[] = {
993 /* OMAP_DSS_CHANNEL_LCD */
994 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI,
995
996 /* OMAP_DSS_CHANNEL_DIGIT */
997 OMAP_DSS_OUTPUT_VENC,
998 };
999
1000 static const enum omap_dss_output_id omap3430_dss_supported_outputs[] = {
1001 /* OMAP_DSS_CHANNEL_LCD */
1002 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1003 OMAP_DSS_OUTPUT_SDI | OMAP_DSS_OUTPUT_DSI1,
1004
1005 /* OMAP_DSS_CHANNEL_DIGIT */
1006 OMAP_DSS_OUTPUT_VENC,
1007 };
1008
1009 static const enum omap_dss_output_id omap3630_dss_supported_outputs[] = {
1010 /* OMAP_DSS_CHANNEL_LCD */
1011 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1012 OMAP_DSS_OUTPUT_DSI1,
1013
1014 /* OMAP_DSS_CHANNEL_DIGIT */
1015 OMAP_DSS_OUTPUT_VENC,
1016 };
1017
1018 static const enum omap_dss_output_id am43xx_dss_supported_outputs[] = {
1019 /* OMAP_DSS_CHANNEL_LCD */
1020 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI,
1021 };
1022
1023 static const enum omap_dss_output_id omap4_dss_supported_outputs[] = {
1024 /* OMAP_DSS_CHANNEL_LCD */
1025 OMAP_DSS_OUTPUT_DBI | OMAP_DSS_OUTPUT_DSI1,
1026
1027 /* OMAP_DSS_CHANNEL_DIGIT */
1028 OMAP_DSS_OUTPUT_VENC | OMAP_DSS_OUTPUT_HDMI,
1029
1030 /* OMAP_DSS_CHANNEL_LCD2 */
1031 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1032 OMAP_DSS_OUTPUT_DSI2,
1033 };
1034
1035 static const enum omap_dss_output_id omap5_dss_supported_outputs[] = {
1036 /* OMAP_DSS_CHANNEL_LCD */
1037 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1038 OMAP_DSS_OUTPUT_DSI1 | OMAP_DSS_OUTPUT_DSI2,
1039
1040 /* OMAP_DSS_CHANNEL_DIGIT */
1041 OMAP_DSS_OUTPUT_HDMI,
1042
1043 /* OMAP_DSS_CHANNEL_LCD2 */
1044 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1045 OMAP_DSS_OUTPUT_DSI1,
1046
1047 /* OMAP_DSS_CHANNEL_LCD3 */
1048 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1049 OMAP_DSS_OUTPUT_DSI2,
1050 };
1051
1052 static const struct dss_features omap24xx_dss_feats = {
1053 .model = DSS_MODEL_OMAP2,
1054 /*
1055 * fck div max is really 16, but the divider range has gaps. The range
1056 * from 1 to 6 has no gaps, so let's use that as a max.
1057 */
1058 .fck_div_max = 6,
1059 .fck_freq_max = 133000000,
1060 .dss_fck_multiplier = 2,
1061 .parent_clk_name = "core_ck",
1062 .ports = omap2plus_ports,
1063 .num_ports = ARRAY_SIZE(omap2plus_ports),
1064 .outputs = omap2_dss_supported_outputs,
1065 .ops = &dss_ops_omap2_omap3,
1066 .dispc_clk_switch = { 0, 0 },
1067 .has_lcd_clk_src = false,
1068 };
1069
1070 static const struct dss_features omap34xx_dss_feats = {
1071 .model = DSS_MODEL_OMAP3,
1072 .fck_div_max = 16,
1073 .fck_freq_max = 173000000,
1074 .dss_fck_multiplier = 2,
1075 .parent_clk_name = "dpll4_ck",
1076 .ports = omap34xx_ports,
1077 .outputs = omap3430_dss_supported_outputs,
1078 .num_ports = ARRAY_SIZE(omap34xx_ports),
1079 .ops = &dss_ops_omap2_omap3,
1080 .dispc_clk_switch = { 0, 0 },
1081 .has_lcd_clk_src = false,
1082 };
1083
1084 static const struct dss_features omap3630_dss_feats = {
1085 .model = DSS_MODEL_OMAP3,
1086 .fck_div_max = 31,
1087 .fck_freq_max = 173000000,
1088 .dss_fck_multiplier = 1,
1089 .parent_clk_name = "dpll4_ck",
1090 .ports = omap2plus_ports,
1091 .num_ports = ARRAY_SIZE(omap2plus_ports),
1092 .outputs = omap3630_dss_supported_outputs,
1093 .ops = &dss_ops_omap2_omap3,
1094 .dispc_clk_switch = { 0, 0 },
1095 .has_lcd_clk_src = false,
1096 };
1097
1098 static const struct dss_features omap44xx_dss_feats = {
1099 .model = DSS_MODEL_OMAP4,
1100 .fck_div_max = 32,
1101 .fck_freq_max = 186000000,
1102 .dss_fck_multiplier = 1,
1103 .parent_clk_name = "dpll_per_x2_ck",
1104 .ports = omap2plus_ports,
1105 .num_ports = ARRAY_SIZE(omap2plus_ports),
1106 .outputs = omap4_dss_supported_outputs,
1107 .ops = &dss_ops_omap4,
1108 .dispc_clk_switch = { 9, 8 },
1109 .has_lcd_clk_src = true,
1110 };
1111
1112 static const struct dss_features omap54xx_dss_feats = {
1113 .model = DSS_MODEL_OMAP5,
1114 .fck_div_max = 64,
1115 .fck_freq_max = 209250000,
1116 .dss_fck_multiplier = 1,
1117 .parent_clk_name = "dpll_per_x2_ck",
1118 .ports = omap2plus_ports,
1119 .num_ports = ARRAY_SIZE(omap2plus_ports),
1120 .outputs = omap5_dss_supported_outputs,
1121 .ops = &dss_ops_omap5,
1122 .dispc_clk_switch = { 9, 7 },
1123 .has_lcd_clk_src = true,
1124 };
1125
1126 static const struct dss_features am43xx_dss_feats = {
1127 .model = DSS_MODEL_OMAP3,
1128 .fck_div_max = 0,
1129 .fck_freq_max = 200000000,
1130 .dss_fck_multiplier = 0,
1131 .parent_clk_name = NULL,
1132 .ports = omap2plus_ports,
1133 .num_ports = ARRAY_SIZE(omap2plus_ports),
1134 .outputs = am43xx_dss_supported_outputs,
1135 .ops = &dss_ops_omap2_omap3,
1136 .dispc_clk_switch = { 0, 0 },
1137 .has_lcd_clk_src = true,
1138 };
1139
1140 static const struct dss_features dra7xx_dss_feats = {
1141 .model = DSS_MODEL_DRA7,
1142 .fck_div_max = 64,
1143 .fck_freq_max = 209250000,
1144 .dss_fck_multiplier = 1,
1145 .parent_clk_name = "dpll_per_x2_ck",
1146 .ports = dra7xx_ports,
1147 .num_ports = ARRAY_SIZE(dra7xx_ports),
1148 .outputs = omap5_dss_supported_outputs,
1149 .ops = &dss_ops_dra7,
1150 .dispc_clk_switch = { 9, 7 },
1151 .has_lcd_clk_src = true,
1152 };
1153
1154 static int dss_init_ports(struct dss_device *dss)
1155 {
1156 struct platform_device *pdev = dss->pdev;
1157 struct device_node *parent = pdev->dev.of_node;
1158 struct device_node *port;
1159 unsigned int i;
1160 int r;
1161
1162 for (i = 0; i < dss->feat->num_ports; i++) {
1163 port = of_graph_get_port_by_id(parent, i);
1164 if (!port)
1165 continue;
1166
1167 switch (dss->feat->ports[i]) {
1168 case OMAP_DISPLAY_TYPE_DPI:
1169 r = dpi_init_port(dss, pdev, port, dss->feat->model);
1170 if (r)
1171 return r;
1172 break;
1173
1174 case OMAP_DISPLAY_TYPE_SDI:
1175 r = sdi_init_port(dss, pdev, port);
1176 if (r)
1177 return r;
1178 break;
1179
1180 default:
1181 break;
1182 }
1183 }
1184
1185 return 0;
1186 }
1187
1188 static void dss_uninit_ports(struct dss_device *dss)
1189 {
1190 struct platform_device *pdev = dss->pdev;
1191 struct device_node *parent = pdev->dev.of_node;
1192 struct device_node *port;
1193 int i;
1194
1195 for (i = 0; i < dss->feat->num_ports; i++) {
1196 port = of_graph_get_port_by_id(parent, i);
1197 if (!port)
1198 continue;
1199
1200 switch (dss->feat->ports[i]) {
1201 case OMAP_DISPLAY_TYPE_DPI:
1202 dpi_uninit_port(port);
1203 break;
1204 case OMAP_DISPLAY_TYPE_SDI:
1205 sdi_uninit_port(port);
1206 break;
1207 default:
1208 break;
1209 }
1210 }
1211 }
1212
1213 static int dss_video_pll_probe(struct dss_device *dss)
1214 {
1215 struct platform_device *pdev = dss->pdev;
1216 struct device_node *np = pdev->dev.of_node;
1217 struct regulator *pll_regulator;
1218 int r;
1219
1220 if (!np)
1221 return 0;
1222
1223 if (of_property_read_bool(np, "syscon-pll-ctrl")) {
1224 dss->syscon_pll_ctrl = syscon_regmap_lookup_by_phandle(np,
1225 "syscon-pll-ctrl");
1226 if (IS_ERR(dss->syscon_pll_ctrl)) {
1227 dev_err(&pdev->dev,
1228 "failed to get syscon-pll-ctrl regmap\n");
1229 return PTR_ERR(dss->syscon_pll_ctrl);
1230 }
1231
1232 if (of_property_read_u32_index(np, "syscon-pll-ctrl", 1,
1233 &dss->syscon_pll_ctrl_offset)) {
1234 dev_err(&pdev->dev,
1235 "failed to get syscon-pll-ctrl offset\n");
1236 return -EINVAL;
1237 }
1238 }
1239
1240 pll_regulator = devm_regulator_get(&pdev->dev, "vdda_video");
1241 if (IS_ERR(pll_regulator)) {
1242 r = PTR_ERR(pll_regulator);
1243
1244 switch (r) {
1245 case -ENOENT:
1246 pll_regulator = NULL;
1247 break;
1248
1249 case -EPROBE_DEFER:
1250 return -EPROBE_DEFER;
1251
1252 default:
1253 DSSERR("can't get DPLL VDDA regulator\n");
1254 return r;
1255 }
1256 }
1257
1258 if (of_property_match_string(np, "reg-names", "pll1") >= 0) {
1259 dss->video1_pll = dss_video_pll_init(dss, pdev, 0,
1260 pll_regulator);
1261 if (IS_ERR(dss->video1_pll))
1262 return PTR_ERR(dss->video1_pll);
1263 }
1264
1265 if (of_property_match_string(np, "reg-names", "pll2") >= 0) {
1266 dss->video2_pll = dss_video_pll_init(dss, pdev, 1,
1267 pll_regulator);
1268 if (IS_ERR(dss->video2_pll)) {
1269 dss_video_pll_uninit(dss->video1_pll);
1270 return PTR_ERR(dss->video2_pll);
1271 }
1272 }
1273
1274 return 0;
1275 }
1276
1277 /* DSS HW IP initialisation */
1278 static const struct of_device_id dss_of_match[] = {
1279 { .compatible = "ti,omap2-dss", .data = &omap24xx_dss_feats },
1280 { .compatible = "ti,omap3-dss", .data = &omap3630_dss_feats },
1281 { .compatible = "ti,omap4-dss", .data = &omap44xx_dss_feats },
1282 { .compatible = "ti,omap5-dss", .data = &omap54xx_dss_feats },
1283 { .compatible = "ti,dra7-dss", .data = &dra7xx_dss_feats },
1284 {},
1285 };
1286 MODULE_DEVICE_TABLE(of, dss_of_match);
1287
1288 static const struct soc_device_attribute dss_soc_devices[] = {
1289 { .machine = "OMAP3430/3530", .data = &omap34xx_dss_feats },
1290 { .machine = "AM35??", .data = &omap34xx_dss_feats },
1291 { .family = "AM43xx", .data = &am43xx_dss_feats },
1292 { /* sentinel */ }
1293 };
1294
1295 static int dss_bind(struct device *dev)
1296 {
1297 struct dss_device *dss = dev_get_drvdata(dev);
1298 struct platform_device *drm_pdev;
1299 int r;
1300
1301 r = component_bind_all(dev, NULL);
1302 if (r)
1303 return r;
1304
1305 pm_set_vt_switch(0);
1306
1307 omapdss_set_dss(dss);
1308
1309 drm_pdev = platform_device_register_simple("omapdrm", 0, NULL, 0);
1310 if (IS_ERR(drm_pdev)) {
1311 component_unbind_all(dev, NULL);
1312 return PTR_ERR(drm_pdev);
1313 }
1314
1315 dss->drm_pdev = drm_pdev;
1316
1317 return 0;
1318 }
1319
1320 static void dss_unbind(struct device *dev)
1321 {
1322 struct dss_device *dss = dev_get_drvdata(dev);
1323
1324 platform_device_unregister(dss->drm_pdev);
1325
1326 omapdss_set_dss(NULL);
1327
1328 component_unbind_all(dev, NULL);
1329 }
1330
1331 static const struct component_master_ops dss_component_ops = {
1332 .bind = dss_bind,
1333 .unbind = dss_unbind,
1334 };
1335
1336 static int dss_component_compare(struct device *dev, void *data)
1337 {
1338 struct device *child = data;
1339 return dev == child;
1340 }
1341
1342 static int dss_add_child_component(struct device *dev, void *data)
1343 {
1344 struct component_match **match = data;
1345
1346 /*
1347 * HACK
1348 * We don't have a working driver for rfbi, so skip it here always.
1349 * Otherwise dss will never get probed successfully, as it will wait
1350 * for rfbi to get probed.
1351 */
1352 if (strstr(dev_name(dev), "rfbi"))
1353 return 0;
1354
1355 component_match_add(dev->parent, match, dss_component_compare, dev);
1356
1357 return 0;
1358 }
1359
1360 static int dss_probe_hardware(struct dss_device *dss)
1361 {
1362 u32 rev;
1363 int r;
1364
1365 r = dss_runtime_get(dss);
1366 if (r)
1367 return r;
1368
1369 dss->dss_clk_rate = clk_get_rate(dss->dss_clk);
1370
1371 /* Select DPLL */
1372 REG_FLD_MOD(dss, DSS_CONTROL, 0, 0, 0);
1373
1374 dss_select_dispc_clk_source(dss, DSS_CLK_SRC_FCK);
1375
1376 #ifdef CONFIG_OMAP2_DSS_VENC
1377 REG_FLD_MOD(dss, DSS_CONTROL, 1, 4, 4); /* venc dac demen */
1378 REG_FLD_MOD(dss, DSS_CONTROL, 1, 3, 3); /* venc clock 4x enable */
1379 REG_FLD_MOD(dss, DSS_CONTROL, 0, 2, 2); /* venc clock mode = normal */
1380 #endif
1381 dss->dsi_clk_source[0] = DSS_CLK_SRC_FCK;
1382 dss->dsi_clk_source[1] = DSS_CLK_SRC_FCK;
1383 dss->dispc_clk_source = DSS_CLK_SRC_FCK;
1384 dss->lcd_clk_source[0] = DSS_CLK_SRC_FCK;
1385 dss->lcd_clk_source[1] = DSS_CLK_SRC_FCK;
1386
1387 rev = dss_read_reg(dss, DSS_REVISION);
1388 pr_info("OMAP DSS rev %d.%d\n", FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
1389
1390 dss_runtime_put(dss);
1391
1392 return 0;
1393 }
1394
1395 static int dss_probe(struct platform_device *pdev)
1396 {
1397 const struct soc_device_attribute *soc;
1398 struct component_match *match = NULL;
1399 struct resource *dss_mem;
1400 struct dss_device *dss;
1401 int r;
1402
1403 dss = kzalloc(sizeof(*dss), GFP_KERNEL);
1404 if (!dss)
1405 return -ENOMEM;
1406
1407 dss->pdev = pdev;
1408 platform_set_drvdata(pdev, dss);
1409
1410 r = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1411 if (r) {
1412 dev_err(&pdev->dev, "Failed to set the DMA mask\n");
1413 goto err_free_dss;
1414 }
1415
1416 /*
1417 * The various OMAP3-based SoCs can't be told apart using the compatible
1418 * string, use SoC device matching.
1419 */
1420 soc = soc_device_match(dss_soc_devices);
1421 if (soc)
1422 dss->feat = soc->data;
1423 else
1424 dss->feat = of_match_device(dss_of_match, &pdev->dev)->data;
1425
1426 /* Map I/O registers, get and setup clocks. */
1427 dss_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1428 dss->base = devm_ioremap_resource(&pdev->dev, dss_mem);
1429 if (IS_ERR(dss->base)) {
1430 r = PTR_ERR(dss->base);
1431 goto err_free_dss;
1432 }
1433
1434 r = dss_get_clocks(dss);
1435 if (r)
1436 goto err_free_dss;
1437
1438 r = dss_setup_default_clock(dss);
1439 if (r)
1440 goto err_put_clocks;
1441
1442 /* Setup the video PLLs and the DPI and SDI ports. */
1443 r = dss_video_pll_probe(dss);
1444 if (r)
1445 goto err_put_clocks;
1446
1447 r = dss_init_ports(dss);
1448 if (r)
1449 goto err_uninit_plls;
1450
1451 /* Enable runtime PM and probe the hardware. */
1452 pm_runtime_enable(&pdev->dev);
1453
1454 r = dss_probe_hardware(dss);
1455 if (r)
1456 goto err_pm_runtime_disable;
1457
1458 /* Initialize debugfs. */
1459 r = dss_initialize_debugfs(dss);
1460 if (r)
1461 goto err_pm_runtime_disable;
1462
1463 dss->debugfs.clk = dss_debugfs_create_file(dss, "clk",
1464 dss_debug_dump_clocks, dss);
1465 dss->debugfs.dss = dss_debugfs_create_file(dss, "dss", dss_dump_regs,
1466 dss);
1467
1468 /* Add all the child devices as components. */
1469 r = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
1470 if (r)
1471 goto err_uninit_debugfs;
1472
1473 omapdss_gather_components(&pdev->dev);
1474
1475 device_for_each_child(&pdev->dev, &match, dss_add_child_component);
1476
1477 r = component_master_add_with_match(&pdev->dev, &dss_component_ops, match);
1478 if (r)
1479 goto err_of_depopulate;
1480
1481 return 0;
1482
1483 err_of_depopulate:
1484 of_platform_depopulate(&pdev->dev);
1485
1486 err_uninit_debugfs:
1487 dss_debugfs_remove_file(dss->debugfs.clk);
1488 dss_debugfs_remove_file(dss->debugfs.dss);
1489 dss_uninitialize_debugfs(dss);
1490
1491 err_pm_runtime_disable:
1492 pm_runtime_disable(&pdev->dev);
1493 dss_uninit_ports(dss);
1494
1495 err_uninit_plls:
1496 if (dss->video1_pll)
1497 dss_video_pll_uninit(dss->video1_pll);
1498 if (dss->video2_pll)
1499 dss_video_pll_uninit(dss->video2_pll);
1500
1501 err_put_clocks:
1502 dss_put_clocks(dss);
1503
1504 err_free_dss:
1505 kfree(dss);
1506
1507 return r;
1508 }
1509
1510 static int dss_remove(struct platform_device *pdev)
1511 {
1512 struct dss_device *dss = platform_get_drvdata(pdev);
1513
1514 of_platform_depopulate(&pdev->dev);
1515
1516 component_master_del(&pdev->dev, &dss_component_ops);
1517
1518 dss_debugfs_remove_file(dss->debugfs.clk);
1519 dss_debugfs_remove_file(dss->debugfs.dss);
1520 dss_uninitialize_debugfs(dss);
1521
1522 pm_runtime_disable(&pdev->dev);
1523
1524 dss_uninit_ports(dss);
1525
1526 if (dss->video1_pll)
1527 dss_video_pll_uninit(dss->video1_pll);
1528
1529 if (dss->video2_pll)
1530 dss_video_pll_uninit(dss->video2_pll);
1531
1532 dss_put_clocks(dss);
1533
1534 kfree(dss);
1535
1536 return 0;
1537 }
1538
1539 static void dss_shutdown(struct platform_device *pdev)
1540 {
1541 struct omap_dss_device *dssdev = NULL;
1542
1543 DSSDBG("shutdown\n");
1544
1545 for_each_dss_output(dssdev) {
1546 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
1547 dssdev->ops->disable(dssdev);
1548 }
1549 }
1550
1551 static int dss_runtime_suspend(struct device *dev)
1552 {
1553 struct dss_device *dss = dev_get_drvdata(dev);
1554
1555 dss_save_context(dss);
1556 dss_set_min_bus_tput(dev, 0);
1557
1558 pinctrl_pm_select_sleep_state(dev);
1559
1560 return 0;
1561 }
1562
1563 static int dss_runtime_resume(struct device *dev)
1564 {
1565 struct dss_device *dss = dev_get_drvdata(dev);
1566 int r;
1567
1568 pinctrl_pm_select_default_state(dev);
1569
1570 /*
1571 * Set an arbitrarily high tput request to ensure OPP100.
1572 * What we should really do is to make a request to stay in OPP100,
1573 * without any tput requirements, but that is not currently possible
1574 * via the PM layer.
1575 */
1576
1577 r = dss_set_min_bus_tput(dev, 1000000000);
1578 if (r)
1579 return r;
1580
1581 dss_restore_context(dss);
1582 return 0;
1583 }
1584
1585 static const struct dev_pm_ops dss_pm_ops = {
1586 .runtime_suspend = dss_runtime_suspend,
1587 .runtime_resume = dss_runtime_resume,
1588 };
1589
1590 struct platform_driver omap_dsshw_driver = {
1591 .probe = dss_probe,
1592 .remove = dss_remove,
1593 .shutdown = dss_shutdown,
1594 .driver = {
1595 .name = "omapdss_dss",
1596 .pm = &dss_pm_ops,
1597 .of_match_table = dss_of_match,
1598 .suppress_bind_attrs = true,
1599 },
1600 };
1601
1602 /* INIT */
1603 static struct platform_driver * const omap_dss_drivers[] = {
1604 &omap_dsshw_driver,
1605 &omap_dispchw_driver,
1606 #ifdef CONFIG_OMAP2_DSS_DSI
1607 &omap_dsihw_driver,
1608 #endif
1609 #ifdef CONFIG_OMAP2_DSS_VENC
1610 &omap_venchw_driver,
1611 #endif
1612 #ifdef CONFIG_OMAP4_DSS_HDMI
1613 &omapdss_hdmi4hw_driver,
1614 #endif
1615 #ifdef CONFIG_OMAP5_DSS_HDMI
1616 &omapdss_hdmi5hw_driver,
1617 #endif
1618 };
1619
1620 static int __init omap_dss_init(void)
1621 {
1622 return platform_register_drivers(omap_dss_drivers,
1623 ARRAY_SIZE(omap_dss_drivers));
1624 }
1625
1626 static void __exit omap_dss_exit(void)
1627 {
1628 platform_unregister_drivers(omap_dss_drivers,
1629 ARRAY_SIZE(omap_dss_drivers));
1630 }
1631
1632 module_init(omap_dss_init);
1633 module_exit(omap_dss_exit);
1634
1635 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
1636 MODULE_DESCRIPTION("OMAP2/3/4/5 Display Subsystem");
1637 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support