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Merge tag 'linux-kselftest-4.8-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kerne...
[deliverable/linux.git] / drivers / gpu / drm / omapdrm / dss / dss.c
1 /*
2 * linux/drivers/video/omap2/dss/dss.c
3 *
4 * Copyright (C) 2009 Nokia Corporation
5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
6 *
7 * Some code and ideas taken from drivers/video/omap/ driver
8 * by Imre Deak.
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published by
12 * the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * more details.
18 *
19 * You should have received a copy of the GNU General Public License along with
20 * this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23 #define DSS_SUBSYS_NAME "DSS"
24
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/io.h>
28 #include <linux/export.h>
29 #include <linux/err.h>
30 #include <linux/delay.h>
31 #include <linux/seq_file.h>
32 #include <linux/clk.h>
33 #include <linux/pinctrl/consumer.h>
34 #include <linux/platform_device.h>
35 #include <linux/pm_runtime.h>
36 #include <linux/gfp.h>
37 #include <linux/sizes.h>
38 #include <linux/mfd/syscon.h>
39 #include <linux/regmap.h>
40 #include <linux/of.h>
41 #include <linux/regulator/consumer.h>
42 #include <linux/suspend.h>
43 #include <linux/component.h>
44
45 #include <video/omapdss.h>
46
47 #include "dss.h"
48 #include "dss_features.h"
49
50 #define DSS_SZ_REGS SZ_512
51
52 struct dss_reg {
53 u16 idx;
54 };
55
56 #define DSS_REG(idx) ((const struct dss_reg) { idx })
57
58 #define DSS_REVISION DSS_REG(0x0000)
59 #define DSS_SYSCONFIG DSS_REG(0x0010)
60 #define DSS_SYSSTATUS DSS_REG(0x0014)
61 #define DSS_CONTROL DSS_REG(0x0040)
62 #define DSS_SDI_CONTROL DSS_REG(0x0044)
63 #define DSS_PLL_CONTROL DSS_REG(0x0048)
64 #define DSS_SDI_STATUS DSS_REG(0x005C)
65
66 #define REG_GET(idx, start, end) \
67 FLD_GET(dss_read_reg(idx), start, end)
68
69 #define REG_FLD_MOD(idx, val, start, end) \
70 dss_write_reg(idx, FLD_MOD(dss_read_reg(idx), val, start, end))
71
72 struct dss_features {
73 u8 fck_div_max;
74 u8 dss_fck_multiplier;
75 const char *parent_clk_name;
76 const enum omap_display_type *ports;
77 int num_ports;
78 int (*dpi_select_source)(int port, enum omap_channel channel);
79 };
80
81 static struct {
82 struct platform_device *pdev;
83 void __iomem *base;
84 struct regmap *syscon_pll_ctrl;
85 u32 syscon_pll_ctrl_offset;
86
87 struct clk *parent_clk;
88 struct clk *dss_clk;
89 unsigned long dss_clk_rate;
90
91 unsigned long cache_req_pck;
92 unsigned long cache_prate;
93 struct dispc_clock_info cache_dispc_cinfo;
94
95 enum omap_dss_clk_source dsi_clk_source[MAX_NUM_DSI];
96 enum omap_dss_clk_source dispc_clk_source;
97 enum omap_dss_clk_source lcd_clk_source[MAX_DSS_LCD_MANAGERS];
98
99 bool ctx_valid;
100 u32 ctx[DSS_SZ_REGS / sizeof(u32)];
101
102 const struct dss_features *feat;
103
104 struct dss_pll *video1_pll;
105 struct dss_pll *video2_pll;
106 } dss;
107
108 static const char * const dss_generic_clk_source_names[] = {
109 [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC] = "DSI_PLL_HSDIV_DISPC",
110 [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI] = "DSI_PLL_HSDIV_DSI",
111 [OMAP_DSS_CLK_SRC_FCK] = "DSS_FCK",
112 [OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC] = "DSI_PLL2_HSDIV_DISPC",
113 [OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI] = "DSI_PLL2_HSDIV_DSI",
114 };
115
116 static bool dss_initialized;
117
118 bool omapdss_is_initialized(void)
119 {
120 return dss_initialized;
121 }
122 EXPORT_SYMBOL(omapdss_is_initialized);
123
124 static inline void dss_write_reg(const struct dss_reg idx, u32 val)
125 {
126 __raw_writel(val, dss.base + idx.idx);
127 }
128
129 static inline u32 dss_read_reg(const struct dss_reg idx)
130 {
131 return __raw_readl(dss.base + idx.idx);
132 }
133
134 #define SR(reg) \
135 dss.ctx[(DSS_##reg).idx / sizeof(u32)] = dss_read_reg(DSS_##reg)
136 #define RR(reg) \
137 dss_write_reg(DSS_##reg, dss.ctx[(DSS_##reg).idx / sizeof(u32)])
138
139 static void dss_save_context(void)
140 {
141 DSSDBG("dss_save_context\n");
142
143 SR(CONTROL);
144
145 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
146 OMAP_DISPLAY_TYPE_SDI) {
147 SR(SDI_CONTROL);
148 SR(PLL_CONTROL);
149 }
150
151 dss.ctx_valid = true;
152
153 DSSDBG("context saved\n");
154 }
155
156 static void dss_restore_context(void)
157 {
158 DSSDBG("dss_restore_context\n");
159
160 if (!dss.ctx_valid)
161 return;
162
163 RR(CONTROL);
164
165 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
166 OMAP_DISPLAY_TYPE_SDI) {
167 RR(SDI_CONTROL);
168 RR(PLL_CONTROL);
169 }
170
171 DSSDBG("context restored\n");
172 }
173
174 #undef SR
175 #undef RR
176
177 void dss_ctrl_pll_enable(enum dss_pll_id pll_id, bool enable)
178 {
179 unsigned shift;
180 unsigned val;
181
182 if (!dss.syscon_pll_ctrl)
183 return;
184
185 val = !enable;
186
187 switch (pll_id) {
188 case DSS_PLL_VIDEO1:
189 shift = 0;
190 break;
191 case DSS_PLL_VIDEO2:
192 shift = 1;
193 break;
194 case DSS_PLL_HDMI:
195 shift = 2;
196 break;
197 default:
198 DSSERR("illegal DSS PLL ID %d\n", pll_id);
199 return;
200 }
201
202 regmap_update_bits(dss.syscon_pll_ctrl, dss.syscon_pll_ctrl_offset,
203 1 << shift, val << shift);
204 }
205
206 void dss_ctrl_pll_set_control_mux(enum dss_pll_id pll_id,
207 enum omap_channel channel)
208 {
209 unsigned shift, val;
210
211 if (!dss.syscon_pll_ctrl)
212 return;
213
214 switch (channel) {
215 case OMAP_DSS_CHANNEL_LCD:
216 shift = 3;
217
218 switch (pll_id) {
219 case DSS_PLL_VIDEO1:
220 val = 0; break;
221 case DSS_PLL_HDMI:
222 val = 1; break;
223 default:
224 DSSERR("error in PLL mux config for LCD\n");
225 return;
226 }
227
228 break;
229 case OMAP_DSS_CHANNEL_LCD2:
230 shift = 5;
231
232 switch (pll_id) {
233 case DSS_PLL_VIDEO1:
234 val = 0; break;
235 case DSS_PLL_VIDEO2:
236 val = 1; break;
237 case DSS_PLL_HDMI:
238 val = 2; break;
239 default:
240 DSSERR("error in PLL mux config for LCD2\n");
241 return;
242 }
243
244 break;
245 case OMAP_DSS_CHANNEL_LCD3:
246 shift = 7;
247
248 switch (pll_id) {
249 case DSS_PLL_VIDEO1:
250 val = 1; break;
251 case DSS_PLL_VIDEO2:
252 val = 0; break;
253 case DSS_PLL_HDMI:
254 val = 2; break;
255 default:
256 DSSERR("error in PLL mux config for LCD3\n");
257 return;
258 }
259
260 break;
261 default:
262 DSSERR("error in PLL mux config\n");
263 return;
264 }
265
266 regmap_update_bits(dss.syscon_pll_ctrl, dss.syscon_pll_ctrl_offset,
267 0x3 << shift, val << shift);
268 }
269
270 void dss_sdi_init(int datapairs)
271 {
272 u32 l;
273
274 BUG_ON(datapairs > 3 || datapairs < 1);
275
276 l = dss_read_reg(DSS_SDI_CONTROL);
277 l = FLD_MOD(l, 0xf, 19, 15); /* SDI_PDIV */
278 l = FLD_MOD(l, datapairs-1, 3, 2); /* SDI_PRSEL */
279 l = FLD_MOD(l, 2, 1, 0); /* SDI_BWSEL */
280 dss_write_reg(DSS_SDI_CONTROL, l);
281
282 l = dss_read_reg(DSS_PLL_CONTROL);
283 l = FLD_MOD(l, 0x7, 25, 22); /* SDI_PLL_FREQSEL */
284 l = FLD_MOD(l, 0xb, 16, 11); /* SDI_PLL_REGN */
285 l = FLD_MOD(l, 0xb4, 10, 1); /* SDI_PLL_REGM */
286 dss_write_reg(DSS_PLL_CONTROL, l);
287 }
288
289 int dss_sdi_enable(void)
290 {
291 unsigned long timeout;
292
293 dispc_pck_free_enable(1);
294
295 /* Reset SDI PLL */
296 REG_FLD_MOD(DSS_PLL_CONTROL, 1, 18, 18); /* SDI_PLL_SYSRESET */
297 udelay(1); /* wait 2x PCLK */
298
299 /* Lock SDI PLL */
300 REG_FLD_MOD(DSS_PLL_CONTROL, 1, 28, 28); /* SDI_PLL_GOBIT */
301
302 /* Waiting for PLL lock request to complete */
303 timeout = jiffies + msecs_to_jiffies(500);
304 while (dss_read_reg(DSS_SDI_STATUS) & (1 << 6)) {
305 if (time_after_eq(jiffies, timeout)) {
306 DSSERR("PLL lock request timed out\n");
307 goto err1;
308 }
309 }
310
311 /* Clearing PLL_GO bit */
312 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 28, 28);
313
314 /* Waiting for PLL to lock */
315 timeout = jiffies + msecs_to_jiffies(500);
316 while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 5))) {
317 if (time_after_eq(jiffies, timeout)) {
318 DSSERR("PLL lock timed out\n");
319 goto err1;
320 }
321 }
322
323 dispc_lcd_enable_signal(1);
324
325 /* Waiting for SDI reset to complete */
326 timeout = jiffies + msecs_to_jiffies(500);
327 while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 2))) {
328 if (time_after_eq(jiffies, timeout)) {
329 DSSERR("SDI reset timed out\n");
330 goto err2;
331 }
332 }
333
334 return 0;
335
336 err2:
337 dispc_lcd_enable_signal(0);
338 err1:
339 /* Reset SDI PLL */
340 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
341
342 dispc_pck_free_enable(0);
343
344 return -ETIMEDOUT;
345 }
346
347 void dss_sdi_disable(void)
348 {
349 dispc_lcd_enable_signal(0);
350
351 dispc_pck_free_enable(0);
352
353 /* Reset SDI PLL */
354 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
355 }
356
357 const char *dss_get_generic_clk_source_name(enum omap_dss_clk_source clk_src)
358 {
359 return dss_generic_clk_source_names[clk_src];
360 }
361
362 void dss_dump_clocks(struct seq_file *s)
363 {
364 const char *fclk_name, *fclk_real_name;
365 unsigned long fclk_rate;
366
367 if (dss_runtime_get())
368 return;
369
370 seq_printf(s, "- DSS -\n");
371
372 fclk_name = dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_FCK);
373 fclk_real_name = dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_FCK);
374 fclk_rate = clk_get_rate(dss.dss_clk);
375
376 seq_printf(s, "%s (%s) = %lu\n",
377 fclk_name, fclk_real_name,
378 fclk_rate);
379
380 dss_runtime_put();
381 }
382
383 static void dss_dump_regs(struct seq_file *s)
384 {
385 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(r))
386
387 if (dss_runtime_get())
388 return;
389
390 DUMPREG(DSS_REVISION);
391 DUMPREG(DSS_SYSCONFIG);
392 DUMPREG(DSS_SYSSTATUS);
393 DUMPREG(DSS_CONTROL);
394
395 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
396 OMAP_DISPLAY_TYPE_SDI) {
397 DUMPREG(DSS_SDI_CONTROL);
398 DUMPREG(DSS_PLL_CONTROL);
399 DUMPREG(DSS_SDI_STATUS);
400 }
401
402 dss_runtime_put();
403 #undef DUMPREG
404 }
405
406 static void dss_select_dispc_clk_source(enum omap_dss_clk_source clk_src)
407 {
408 int b;
409 u8 start, end;
410
411 switch (clk_src) {
412 case OMAP_DSS_CLK_SRC_FCK:
413 b = 0;
414 break;
415 case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC:
416 b = 1;
417 break;
418 case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC:
419 b = 2;
420 break;
421 default:
422 BUG();
423 return;
424 }
425
426 dss_feat_get_reg_field(FEAT_REG_DISPC_CLK_SWITCH, &start, &end);
427
428 REG_FLD_MOD(DSS_CONTROL, b, start, end); /* DISPC_CLK_SWITCH */
429
430 dss.dispc_clk_source = clk_src;
431 }
432
433 void dss_select_dsi_clk_source(int dsi_module,
434 enum omap_dss_clk_source clk_src)
435 {
436 int b, pos;
437
438 switch (clk_src) {
439 case OMAP_DSS_CLK_SRC_FCK:
440 b = 0;
441 break;
442 case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI:
443 BUG_ON(dsi_module != 0);
444 b = 1;
445 break;
446 case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI:
447 BUG_ON(dsi_module != 1);
448 b = 1;
449 break;
450 default:
451 BUG();
452 return;
453 }
454
455 pos = dsi_module == 0 ? 1 : 10;
456 REG_FLD_MOD(DSS_CONTROL, b, pos, pos); /* DSIx_CLK_SWITCH */
457
458 dss.dsi_clk_source[dsi_module] = clk_src;
459 }
460
461 void dss_select_lcd_clk_source(enum omap_channel channel,
462 enum omap_dss_clk_source clk_src)
463 {
464 int b, ix, pos;
465
466 if (!dss_has_feature(FEAT_LCD_CLK_SRC)) {
467 dss_select_dispc_clk_source(clk_src);
468 return;
469 }
470
471 switch (clk_src) {
472 case OMAP_DSS_CLK_SRC_FCK:
473 b = 0;
474 break;
475 case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC:
476 BUG_ON(channel != OMAP_DSS_CHANNEL_LCD);
477 b = 1;
478 break;
479 case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC:
480 BUG_ON(channel != OMAP_DSS_CHANNEL_LCD2 &&
481 channel != OMAP_DSS_CHANNEL_LCD3);
482 b = 1;
483 break;
484 default:
485 BUG();
486 return;
487 }
488
489 pos = channel == OMAP_DSS_CHANNEL_LCD ? 0 :
490 (channel == OMAP_DSS_CHANNEL_LCD2 ? 12 : 19);
491 REG_FLD_MOD(DSS_CONTROL, b, pos, pos); /* LCDx_CLK_SWITCH */
492
493 ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 :
494 (channel == OMAP_DSS_CHANNEL_LCD2 ? 1 : 2);
495 dss.lcd_clk_source[ix] = clk_src;
496 }
497
498 enum omap_dss_clk_source dss_get_dispc_clk_source(void)
499 {
500 return dss.dispc_clk_source;
501 }
502
503 enum omap_dss_clk_source dss_get_dsi_clk_source(int dsi_module)
504 {
505 return dss.dsi_clk_source[dsi_module];
506 }
507
508 enum omap_dss_clk_source dss_get_lcd_clk_source(enum omap_channel channel)
509 {
510 if (dss_has_feature(FEAT_LCD_CLK_SRC)) {
511 int ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 :
512 (channel == OMAP_DSS_CHANNEL_LCD2 ? 1 : 2);
513 return dss.lcd_clk_source[ix];
514 } else {
515 /* LCD_CLK source is the same as DISPC_FCLK source for
516 * OMAP2 and OMAP3 */
517 return dss.dispc_clk_source;
518 }
519 }
520
521 bool dss_div_calc(unsigned long pck, unsigned long fck_min,
522 dss_div_calc_func func, void *data)
523 {
524 int fckd, fckd_start, fckd_stop;
525 unsigned long fck;
526 unsigned long fck_hw_max;
527 unsigned long fckd_hw_max;
528 unsigned long prate;
529 unsigned m;
530
531 fck_hw_max = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK);
532
533 if (dss.parent_clk == NULL) {
534 unsigned pckd;
535
536 pckd = fck_hw_max / pck;
537
538 fck = pck * pckd;
539
540 fck = clk_round_rate(dss.dss_clk, fck);
541
542 return func(fck, data);
543 }
544
545 fckd_hw_max = dss.feat->fck_div_max;
546
547 m = dss.feat->dss_fck_multiplier;
548 prate = clk_get_rate(dss.parent_clk);
549
550 fck_min = fck_min ? fck_min : 1;
551
552 fckd_start = min(prate * m / fck_min, fckd_hw_max);
553 fckd_stop = max(DIV_ROUND_UP(prate * m, fck_hw_max), 1ul);
554
555 for (fckd = fckd_start; fckd >= fckd_stop; --fckd) {
556 fck = DIV_ROUND_UP(prate, fckd) * m;
557
558 if (func(fck, data))
559 return true;
560 }
561
562 return false;
563 }
564
565 int dss_set_fck_rate(unsigned long rate)
566 {
567 int r;
568
569 DSSDBG("set fck to %lu\n", rate);
570
571 r = clk_set_rate(dss.dss_clk, rate);
572 if (r)
573 return r;
574
575 dss.dss_clk_rate = clk_get_rate(dss.dss_clk);
576
577 WARN_ONCE(dss.dss_clk_rate != rate,
578 "clk rate mismatch: %lu != %lu", dss.dss_clk_rate,
579 rate);
580
581 return 0;
582 }
583
584 unsigned long dss_get_dispc_clk_rate(void)
585 {
586 return dss.dss_clk_rate;
587 }
588
589 static int dss_setup_default_clock(void)
590 {
591 unsigned long max_dss_fck, prate;
592 unsigned long fck;
593 unsigned fck_div;
594 int r;
595
596 max_dss_fck = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK);
597
598 if (dss.parent_clk == NULL) {
599 fck = clk_round_rate(dss.dss_clk, max_dss_fck);
600 } else {
601 prate = clk_get_rate(dss.parent_clk);
602
603 fck_div = DIV_ROUND_UP(prate * dss.feat->dss_fck_multiplier,
604 max_dss_fck);
605 fck = DIV_ROUND_UP(prate, fck_div) * dss.feat->dss_fck_multiplier;
606 }
607
608 r = dss_set_fck_rate(fck);
609 if (r)
610 return r;
611
612 return 0;
613 }
614
615 void dss_set_venc_output(enum omap_dss_venc_type type)
616 {
617 int l = 0;
618
619 if (type == OMAP_DSS_VENC_TYPE_COMPOSITE)
620 l = 0;
621 else if (type == OMAP_DSS_VENC_TYPE_SVIDEO)
622 l = 1;
623 else
624 BUG();
625
626 /* venc out selection. 0 = comp, 1 = svideo */
627 REG_FLD_MOD(DSS_CONTROL, l, 6, 6);
628 }
629
630 void dss_set_dac_pwrdn_bgz(bool enable)
631 {
632 REG_FLD_MOD(DSS_CONTROL, enable, 5, 5); /* DAC Power-Down Control */
633 }
634
635 void dss_select_hdmi_venc_clk_source(enum dss_hdmi_venc_clk_source_select src)
636 {
637 enum omap_display_type dp;
638 dp = dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_DIGIT);
639
640 /* Complain about invalid selections */
641 WARN_ON((src == DSS_VENC_TV_CLK) && !(dp & OMAP_DISPLAY_TYPE_VENC));
642 WARN_ON((src == DSS_HDMI_M_PCLK) && !(dp & OMAP_DISPLAY_TYPE_HDMI));
643
644 /* Select only if we have options */
645 if ((dp & OMAP_DISPLAY_TYPE_VENC) && (dp & OMAP_DISPLAY_TYPE_HDMI))
646 REG_FLD_MOD(DSS_CONTROL, src, 15, 15); /* VENC_HDMI_SWITCH */
647 }
648
649 enum dss_hdmi_venc_clk_source_select dss_get_hdmi_venc_clk_source(void)
650 {
651 enum omap_display_type displays;
652
653 displays = dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_DIGIT);
654 if ((displays & OMAP_DISPLAY_TYPE_HDMI) == 0)
655 return DSS_VENC_TV_CLK;
656
657 if ((displays & OMAP_DISPLAY_TYPE_VENC) == 0)
658 return DSS_HDMI_M_PCLK;
659
660 return REG_GET(DSS_CONTROL, 15, 15);
661 }
662
663 static int dss_dpi_select_source_omap2_omap3(int port, enum omap_channel channel)
664 {
665 if (channel != OMAP_DSS_CHANNEL_LCD)
666 return -EINVAL;
667
668 return 0;
669 }
670
671 static int dss_dpi_select_source_omap4(int port, enum omap_channel channel)
672 {
673 int val;
674
675 switch (channel) {
676 case OMAP_DSS_CHANNEL_LCD2:
677 val = 0;
678 break;
679 case OMAP_DSS_CHANNEL_DIGIT:
680 val = 1;
681 break;
682 default:
683 return -EINVAL;
684 }
685
686 REG_FLD_MOD(DSS_CONTROL, val, 17, 17);
687
688 return 0;
689 }
690
691 static int dss_dpi_select_source_omap5(int port, enum omap_channel channel)
692 {
693 int val;
694
695 switch (channel) {
696 case OMAP_DSS_CHANNEL_LCD:
697 val = 1;
698 break;
699 case OMAP_DSS_CHANNEL_LCD2:
700 val = 2;
701 break;
702 case OMAP_DSS_CHANNEL_LCD3:
703 val = 3;
704 break;
705 case OMAP_DSS_CHANNEL_DIGIT:
706 val = 0;
707 break;
708 default:
709 return -EINVAL;
710 }
711
712 REG_FLD_MOD(DSS_CONTROL, val, 17, 16);
713
714 return 0;
715 }
716
717 static int dss_dpi_select_source_dra7xx(int port, enum omap_channel channel)
718 {
719 switch (port) {
720 case 0:
721 return dss_dpi_select_source_omap5(port, channel);
722 case 1:
723 if (channel != OMAP_DSS_CHANNEL_LCD2)
724 return -EINVAL;
725 break;
726 case 2:
727 if (channel != OMAP_DSS_CHANNEL_LCD3)
728 return -EINVAL;
729 break;
730 default:
731 return -EINVAL;
732 }
733
734 return 0;
735 }
736
737 int dss_dpi_select_source(int port, enum omap_channel channel)
738 {
739 return dss.feat->dpi_select_source(port, channel);
740 }
741
742 static int dss_get_clocks(void)
743 {
744 struct clk *clk;
745
746 clk = devm_clk_get(&dss.pdev->dev, "fck");
747 if (IS_ERR(clk)) {
748 DSSERR("can't get clock fck\n");
749 return PTR_ERR(clk);
750 }
751
752 dss.dss_clk = clk;
753
754 if (dss.feat->parent_clk_name) {
755 clk = clk_get(NULL, dss.feat->parent_clk_name);
756 if (IS_ERR(clk)) {
757 DSSERR("Failed to get %s\n", dss.feat->parent_clk_name);
758 return PTR_ERR(clk);
759 }
760 } else {
761 clk = NULL;
762 }
763
764 dss.parent_clk = clk;
765
766 return 0;
767 }
768
769 static void dss_put_clocks(void)
770 {
771 if (dss.parent_clk)
772 clk_put(dss.parent_clk);
773 }
774
775 int dss_runtime_get(void)
776 {
777 int r;
778
779 DSSDBG("dss_runtime_get\n");
780
781 r = pm_runtime_get_sync(&dss.pdev->dev);
782 WARN_ON(r < 0);
783 return r < 0 ? r : 0;
784 }
785
786 void dss_runtime_put(void)
787 {
788 int r;
789
790 DSSDBG("dss_runtime_put\n");
791
792 r = pm_runtime_put_sync(&dss.pdev->dev);
793 WARN_ON(r < 0 && r != -ENOSYS && r != -EBUSY);
794 }
795
796 /* DEBUGFS */
797 #if defined(CONFIG_OMAP2_DSS_DEBUGFS)
798 void dss_debug_dump_clocks(struct seq_file *s)
799 {
800 dss_dump_clocks(s);
801 dispc_dump_clocks(s);
802 #ifdef CONFIG_OMAP2_DSS_DSI
803 dsi_dump_clocks(s);
804 #endif
805 }
806 #endif
807
808
809 static const enum omap_display_type omap2plus_ports[] = {
810 OMAP_DISPLAY_TYPE_DPI,
811 };
812
813 static const enum omap_display_type omap34xx_ports[] = {
814 OMAP_DISPLAY_TYPE_DPI,
815 OMAP_DISPLAY_TYPE_SDI,
816 };
817
818 static const enum omap_display_type dra7xx_ports[] = {
819 OMAP_DISPLAY_TYPE_DPI,
820 OMAP_DISPLAY_TYPE_DPI,
821 OMAP_DISPLAY_TYPE_DPI,
822 };
823
824 static const struct dss_features omap24xx_dss_feats = {
825 /*
826 * fck div max is really 16, but the divider range has gaps. The range
827 * from 1 to 6 has no gaps, so let's use that as a max.
828 */
829 .fck_div_max = 6,
830 .dss_fck_multiplier = 2,
831 .parent_clk_name = "core_ck",
832 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
833 .ports = omap2plus_ports,
834 .num_ports = ARRAY_SIZE(omap2plus_ports),
835 };
836
837 static const struct dss_features omap34xx_dss_feats = {
838 .fck_div_max = 16,
839 .dss_fck_multiplier = 2,
840 .parent_clk_name = "dpll4_ck",
841 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
842 .ports = omap34xx_ports,
843 .num_ports = ARRAY_SIZE(omap34xx_ports),
844 };
845
846 static const struct dss_features omap3630_dss_feats = {
847 .fck_div_max = 32,
848 .dss_fck_multiplier = 1,
849 .parent_clk_name = "dpll4_ck",
850 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
851 .ports = omap2plus_ports,
852 .num_ports = ARRAY_SIZE(omap2plus_ports),
853 };
854
855 static const struct dss_features omap44xx_dss_feats = {
856 .fck_div_max = 32,
857 .dss_fck_multiplier = 1,
858 .parent_clk_name = "dpll_per_x2_ck",
859 .dpi_select_source = &dss_dpi_select_source_omap4,
860 .ports = omap2plus_ports,
861 .num_ports = ARRAY_SIZE(omap2plus_ports),
862 };
863
864 static const struct dss_features omap54xx_dss_feats = {
865 .fck_div_max = 64,
866 .dss_fck_multiplier = 1,
867 .parent_clk_name = "dpll_per_x2_ck",
868 .dpi_select_source = &dss_dpi_select_source_omap5,
869 .ports = omap2plus_ports,
870 .num_ports = ARRAY_SIZE(omap2plus_ports),
871 };
872
873 static const struct dss_features am43xx_dss_feats = {
874 .fck_div_max = 0,
875 .dss_fck_multiplier = 0,
876 .parent_clk_name = NULL,
877 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
878 .ports = omap2plus_ports,
879 .num_ports = ARRAY_SIZE(omap2plus_ports),
880 };
881
882 static const struct dss_features dra7xx_dss_feats = {
883 .fck_div_max = 64,
884 .dss_fck_multiplier = 1,
885 .parent_clk_name = "dpll_per_x2_ck",
886 .dpi_select_source = &dss_dpi_select_source_dra7xx,
887 .ports = dra7xx_ports,
888 .num_ports = ARRAY_SIZE(dra7xx_ports),
889 };
890
891 static int dss_init_features(struct platform_device *pdev)
892 {
893 const struct dss_features *src;
894 struct dss_features *dst;
895
896 dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL);
897 if (!dst) {
898 dev_err(&pdev->dev, "Failed to allocate local DSS Features\n");
899 return -ENOMEM;
900 }
901
902 switch (omapdss_get_version()) {
903 case OMAPDSS_VER_OMAP24xx:
904 src = &omap24xx_dss_feats;
905 break;
906
907 case OMAPDSS_VER_OMAP34xx_ES1:
908 case OMAPDSS_VER_OMAP34xx_ES3:
909 case OMAPDSS_VER_AM35xx:
910 src = &omap34xx_dss_feats;
911 break;
912
913 case OMAPDSS_VER_OMAP3630:
914 src = &omap3630_dss_feats;
915 break;
916
917 case OMAPDSS_VER_OMAP4430_ES1:
918 case OMAPDSS_VER_OMAP4430_ES2:
919 case OMAPDSS_VER_OMAP4:
920 src = &omap44xx_dss_feats;
921 break;
922
923 case OMAPDSS_VER_OMAP5:
924 src = &omap54xx_dss_feats;
925 break;
926
927 case OMAPDSS_VER_AM43xx:
928 src = &am43xx_dss_feats;
929 break;
930
931 case OMAPDSS_VER_DRA7xx:
932 src = &dra7xx_dss_feats;
933 break;
934
935 default:
936 return -ENODEV;
937 }
938
939 memcpy(dst, src, sizeof(*dst));
940 dss.feat = dst;
941
942 return 0;
943 }
944
945 static int dss_init_ports(struct platform_device *pdev)
946 {
947 struct device_node *parent = pdev->dev.of_node;
948 struct device_node *port;
949 int r;
950
951 if (parent == NULL)
952 return 0;
953
954 port = omapdss_of_get_next_port(parent, NULL);
955 if (!port)
956 return 0;
957
958 if (dss.feat->num_ports == 0)
959 return 0;
960
961 do {
962 enum omap_display_type port_type;
963 u32 reg;
964
965 r = of_property_read_u32(port, "reg", &reg);
966 if (r)
967 reg = 0;
968
969 if (reg >= dss.feat->num_ports)
970 continue;
971
972 port_type = dss.feat->ports[reg];
973
974 switch (port_type) {
975 case OMAP_DISPLAY_TYPE_DPI:
976 dpi_init_port(pdev, port);
977 break;
978 case OMAP_DISPLAY_TYPE_SDI:
979 sdi_init_port(pdev, port);
980 break;
981 default:
982 break;
983 }
984 } while ((port = omapdss_of_get_next_port(parent, port)) != NULL);
985
986 return 0;
987 }
988
989 static void dss_uninit_ports(struct platform_device *pdev)
990 {
991 struct device_node *parent = pdev->dev.of_node;
992 struct device_node *port;
993
994 if (parent == NULL)
995 return;
996
997 port = omapdss_of_get_next_port(parent, NULL);
998 if (!port)
999 return;
1000
1001 if (dss.feat->num_ports == 0)
1002 return;
1003
1004 do {
1005 enum omap_display_type port_type;
1006 u32 reg;
1007 int r;
1008
1009 r = of_property_read_u32(port, "reg", &reg);
1010 if (r)
1011 reg = 0;
1012
1013 if (reg >= dss.feat->num_ports)
1014 continue;
1015
1016 port_type = dss.feat->ports[reg];
1017
1018 switch (port_type) {
1019 case OMAP_DISPLAY_TYPE_DPI:
1020 dpi_uninit_port(port);
1021 break;
1022 case OMAP_DISPLAY_TYPE_SDI:
1023 sdi_uninit_port(port);
1024 break;
1025 default:
1026 break;
1027 }
1028 } while ((port = omapdss_of_get_next_port(parent, port)) != NULL);
1029 }
1030
1031 static int dss_video_pll_probe(struct platform_device *pdev)
1032 {
1033 struct device_node *np = pdev->dev.of_node;
1034 struct regulator *pll_regulator;
1035 int r;
1036
1037 if (!np)
1038 return 0;
1039
1040 if (of_property_read_bool(np, "syscon-pll-ctrl")) {
1041 dss.syscon_pll_ctrl = syscon_regmap_lookup_by_phandle(np,
1042 "syscon-pll-ctrl");
1043 if (IS_ERR(dss.syscon_pll_ctrl)) {
1044 dev_err(&pdev->dev,
1045 "failed to get syscon-pll-ctrl regmap\n");
1046 return PTR_ERR(dss.syscon_pll_ctrl);
1047 }
1048
1049 if (of_property_read_u32_index(np, "syscon-pll-ctrl", 1,
1050 &dss.syscon_pll_ctrl_offset)) {
1051 dev_err(&pdev->dev,
1052 "failed to get syscon-pll-ctrl offset\n");
1053 return -EINVAL;
1054 }
1055 }
1056
1057 pll_regulator = devm_regulator_get(&pdev->dev, "vdda_video");
1058 if (IS_ERR(pll_regulator)) {
1059 r = PTR_ERR(pll_regulator);
1060
1061 switch (r) {
1062 case -ENOENT:
1063 pll_regulator = NULL;
1064 break;
1065
1066 case -EPROBE_DEFER:
1067 return -EPROBE_DEFER;
1068
1069 default:
1070 DSSERR("can't get DPLL VDDA regulator\n");
1071 return r;
1072 }
1073 }
1074
1075 if (of_property_match_string(np, "reg-names", "pll1") >= 0) {
1076 dss.video1_pll = dss_video_pll_init(pdev, 0, pll_regulator);
1077 if (IS_ERR(dss.video1_pll))
1078 return PTR_ERR(dss.video1_pll);
1079 }
1080
1081 if (of_property_match_string(np, "reg-names", "pll2") >= 0) {
1082 dss.video2_pll = dss_video_pll_init(pdev, 1, pll_regulator);
1083 if (IS_ERR(dss.video2_pll)) {
1084 dss_video_pll_uninit(dss.video1_pll);
1085 return PTR_ERR(dss.video2_pll);
1086 }
1087 }
1088
1089 return 0;
1090 }
1091
1092 /* DSS HW IP initialisation */
1093 static int dss_bind(struct device *dev)
1094 {
1095 struct platform_device *pdev = to_platform_device(dev);
1096 struct resource *dss_mem;
1097 u32 rev;
1098 int r;
1099
1100 dss.pdev = pdev;
1101
1102 r = dss_init_features(dss.pdev);
1103 if (r)
1104 return r;
1105
1106 dss_mem = platform_get_resource(dss.pdev, IORESOURCE_MEM, 0);
1107 if (!dss_mem) {
1108 DSSERR("can't get IORESOURCE_MEM DSS\n");
1109 return -EINVAL;
1110 }
1111
1112 dss.base = devm_ioremap(&pdev->dev, dss_mem->start,
1113 resource_size(dss_mem));
1114 if (!dss.base) {
1115 DSSERR("can't ioremap DSS\n");
1116 return -ENOMEM;
1117 }
1118
1119 r = dss_get_clocks();
1120 if (r)
1121 return r;
1122
1123 r = dss_setup_default_clock();
1124 if (r)
1125 goto err_setup_clocks;
1126
1127 r = dss_video_pll_probe(pdev);
1128 if (r)
1129 goto err_pll_init;
1130
1131 r = dss_init_ports(pdev);
1132 if (r)
1133 goto err_init_ports;
1134
1135 pm_runtime_enable(&pdev->dev);
1136
1137 r = dss_runtime_get();
1138 if (r)
1139 goto err_runtime_get;
1140
1141 dss.dss_clk_rate = clk_get_rate(dss.dss_clk);
1142
1143 /* Select DPLL */
1144 REG_FLD_MOD(DSS_CONTROL, 0, 0, 0);
1145
1146 dss_select_dispc_clk_source(OMAP_DSS_CLK_SRC_FCK);
1147
1148 #ifdef CONFIG_OMAP2_DSS_VENC
1149 REG_FLD_MOD(DSS_CONTROL, 1, 4, 4); /* venc dac demen */
1150 REG_FLD_MOD(DSS_CONTROL, 1, 3, 3); /* venc clock 4x enable */
1151 REG_FLD_MOD(DSS_CONTROL, 0, 2, 2); /* venc clock mode = normal */
1152 #endif
1153 dss.dsi_clk_source[0] = OMAP_DSS_CLK_SRC_FCK;
1154 dss.dsi_clk_source[1] = OMAP_DSS_CLK_SRC_FCK;
1155 dss.dispc_clk_source = OMAP_DSS_CLK_SRC_FCK;
1156 dss.lcd_clk_source[0] = OMAP_DSS_CLK_SRC_FCK;
1157 dss.lcd_clk_source[1] = OMAP_DSS_CLK_SRC_FCK;
1158
1159 rev = dss_read_reg(DSS_REVISION);
1160 printk(KERN_INFO "OMAP DSS rev %d.%d\n",
1161 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
1162
1163 dss_runtime_put();
1164
1165 r = component_bind_all(&pdev->dev, NULL);
1166 if (r)
1167 goto err_component;
1168
1169 dss_debugfs_create_file("dss", dss_dump_regs);
1170
1171 pm_set_vt_switch(0);
1172
1173 dss_initialized = true;
1174
1175 return 0;
1176
1177 err_component:
1178 err_runtime_get:
1179 pm_runtime_disable(&pdev->dev);
1180 dss_uninit_ports(pdev);
1181 err_init_ports:
1182 if (dss.video1_pll)
1183 dss_video_pll_uninit(dss.video1_pll);
1184
1185 if (dss.video2_pll)
1186 dss_video_pll_uninit(dss.video2_pll);
1187 err_pll_init:
1188 err_setup_clocks:
1189 dss_put_clocks();
1190 return r;
1191 }
1192
1193 static void dss_unbind(struct device *dev)
1194 {
1195 struct platform_device *pdev = to_platform_device(dev);
1196
1197 dss_initialized = false;
1198
1199 component_unbind_all(&pdev->dev, NULL);
1200
1201 if (dss.video1_pll)
1202 dss_video_pll_uninit(dss.video1_pll);
1203
1204 if (dss.video2_pll)
1205 dss_video_pll_uninit(dss.video2_pll);
1206
1207 dss_uninit_ports(pdev);
1208
1209 pm_runtime_disable(&pdev->dev);
1210
1211 dss_put_clocks();
1212 }
1213
1214 static const struct component_master_ops dss_component_ops = {
1215 .bind = dss_bind,
1216 .unbind = dss_unbind,
1217 };
1218
1219 static int dss_component_compare(struct device *dev, void *data)
1220 {
1221 struct device *child = data;
1222 return dev == child;
1223 }
1224
1225 static int dss_add_child_component(struct device *dev, void *data)
1226 {
1227 struct component_match **match = data;
1228
1229 /*
1230 * HACK
1231 * We don't have a working driver for rfbi, so skip it here always.
1232 * Otherwise dss will never get probed successfully, as it will wait
1233 * for rfbi to get probed.
1234 */
1235 if (strstr(dev_name(dev), "rfbi"))
1236 return 0;
1237
1238 component_match_add(dev->parent, match, dss_component_compare, dev);
1239
1240 return 0;
1241 }
1242
1243 static int dss_probe(struct platform_device *pdev)
1244 {
1245 struct component_match *match = NULL;
1246 int r;
1247
1248 /* add all the child devices as components */
1249 device_for_each_child(&pdev->dev, &match, dss_add_child_component);
1250
1251 r = component_master_add_with_match(&pdev->dev, &dss_component_ops, match);
1252 if (r)
1253 return r;
1254
1255 return 0;
1256 }
1257
1258 static int dss_remove(struct platform_device *pdev)
1259 {
1260 component_master_del(&pdev->dev, &dss_component_ops);
1261 return 0;
1262 }
1263
1264 static int dss_runtime_suspend(struct device *dev)
1265 {
1266 dss_save_context();
1267 dss_set_min_bus_tput(dev, 0);
1268
1269 pinctrl_pm_select_sleep_state(dev);
1270
1271 return 0;
1272 }
1273
1274 static int dss_runtime_resume(struct device *dev)
1275 {
1276 int r;
1277
1278 pinctrl_pm_select_default_state(dev);
1279
1280 /*
1281 * Set an arbitrarily high tput request to ensure OPP100.
1282 * What we should really do is to make a request to stay in OPP100,
1283 * without any tput requirements, but that is not currently possible
1284 * via the PM layer.
1285 */
1286
1287 r = dss_set_min_bus_tput(dev, 1000000000);
1288 if (r)
1289 return r;
1290
1291 dss_restore_context();
1292 return 0;
1293 }
1294
1295 static const struct dev_pm_ops dss_pm_ops = {
1296 .runtime_suspend = dss_runtime_suspend,
1297 .runtime_resume = dss_runtime_resume,
1298 };
1299
1300 static const struct of_device_id dss_of_match[] = {
1301 { .compatible = "ti,omap2-dss", },
1302 { .compatible = "ti,omap3-dss", },
1303 { .compatible = "ti,omap4-dss", },
1304 { .compatible = "ti,omap5-dss", },
1305 { .compatible = "ti,dra7-dss", },
1306 {},
1307 };
1308
1309 MODULE_DEVICE_TABLE(of, dss_of_match);
1310
1311 static struct platform_driver omap_dsshw_driver = {
1312 .probe = dss_probe,
1313 .remove = dss_remove,
1314 .driver = {
1315 .name = "omapdss_dss",
1316 .pm = &dss_pm_ops,
1317 .of_match_table = dss_of_match,
1318 .suppress_bind_attrs = true,
1319 },
1320 };
1321
1322 int __init dss_init_platform_driver(void)
1323 {
1324 return platform_driver_register(&omap_dsshw_driver);
1325 }
1326
1327 void dss_uninit_platform_driver(void)
1328 {
1329 platform_driver_unregister(&omap_dsshw_driver);
1330 }
Linux kernel - Deliverables
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