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path: root/drivers/gpu/drm/omapdrm/dss/dss.c
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Diffstat (limited to 'drivers/gpu/drm/omapdrm/dss/dss.c')
-rw-r--r--drivers/gpu/drm/omapdrm/dss/dss.c1329
1 files changed, 1329 insertions, 0 deletions
diff --git a/drivers/gpu/drm/omapdrm/dss/dss.c b/drivers/gpu/drm/omapdrm/dss/dss.c
new file mode 100644
index 000000000000..f95ff319e68e
--- /dev/null
+++ b/drivers/gpu/drm/omapdrm/dss/dss.c
@@ -0,0 +1,1329 @@
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/platform_device.h>
34#include <linux/pm_runtime.h>
35#include <linux/gfp.h>
36#include <linux/sizes.h>
37#include <linux/mfd/syscon.h>
38#include <linux/regmap.h>
39#include <linux/of.h>
40#include <linux/regulator/consumer.h>
41#include <linux/suspend.h>
42#include <linux/component.h>
43
44#include <video/omapdss.h>
45
46#include "dss.h"
47#include "dss_features.h"
48
49#define DSS_SZ_REGS SZ_512
50
51struct dss_reg {
52 u16 idx;
53};
54
55#define DSS_REG(idx) ((const struct dss_reg) { idx })
56
57#define DSS_REVISION DSS_REG(0x0000)
58#define DSS_SYSCONFIG DSS_REG(0x0010)
59#define DSS_SYSSTATUS DSS_REG(0x0014)
60#define DSS_CONTROL DSS_REG(0x0040)
61#define DSS_SDI_CONTROL DSS_REG(0x0044)
62#define DSS_PLL_CONTROL DSS_REG(0x0048)
63#define DSS_SDI_STATUS DSS_REG(0x005C)
64
65#define REG_GET(idx, start, end) \
66 FLD_GET(dss_read_reg(idx), start, end)
67
68#define REG_FLD_MOD(idx, val, start, end) \
69 dss_write_reg(idx, FLD_MOD(dss_read_reg(idx), val, start, end))
70
71struct dss_features {
72 u8 fck_div_max;
73 u8 dss_fck_multiplier;
74 const char *parent_clk_name;
75 const enum omap_display_type *ports;
76 int num_ports;
77 int (*dpi_select_source)(int port, enum omap_channel channel);
78};
79
80static struct {
81 struct platform_device *pdev;
82 void __iomem *base;
83 struct regmap *syscon_pll_ctrl;
84 u32 syscon_pll_ctrl_offset;
85
86 struct clk *parent_clk;
87 struct clk *dss_clk;
88 unsigned long dss_clk_rate;
89
90 unsigned long cache_req_pck;
91 unsigned long cache_prate;
92 struct dispc_clock_info cache_dispc_cinfo;
93
94 enum omap_dss_clk_source dsi_clk_source[MAX_NUM_DSI];
95 enum omap_dss_clk_source dispc_clk_source;
96 enum omap_dss_clk_source lcd_clk_source[MAX_DSS_LCD_MANAGERS];
97
98 bool ctx_valid;
99 u32 ctx[DSS_SZ_REGS / sizeof(u32)];
100
101 const struct dss_features *feat;
102
103 struct dss_pll *video1_pll;
104 struct dss_pll *video2_pll;
105} dss;
106
107static const char * const dss_generic_clk_source_names[] = {
108 [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC] = "DSI_PLL_HSDIV_DISPC",
109 [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI] = "DSI_PLL_HSDIV_DSI",
110 [OMAP_DSS_CLK_SRC_FCK] = "DSS_FCK",
111 [OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC] = "DSI_PLL2_HSDIV_DISPC",
112 [OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI] = "DSI_PLL2_HSDIV_DSI",
113};
114
115static bool dss_initialized;
116
117bool omapdss_is_initialized(void)
118{
119 return dss_initialized;
120}
121EXPORT_SYMBOL(omapdss_is_initialized);
122
123static inline void dss_write_reg(const struct dss_reg idx, u32 val)
124{
125 __raw_writel(val, dss.base + idx.idx);
126}
127
128static inline u32 dss_read_reg(const struct dss_reg idx)
129{
130 return __raw_readl(dss.base + idx.idx);
131}
132
133#define SR(reg) \
134 dss.ctx[(DSS_##reg).idx / sizeof(u32)] = dss_read_reg(DSS_##reg)
135#define RR(reg) \
136 dss_write_reg(DSS_##reg, dss.ctx[(DSS_##reg).idx / sizeof(u32)])
137
138static void dss_save_context(void)
139{
140 DSSDBG("dss_save_context\n");
141
142 SR(CONTROL);
143
144 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
145 OMAP_DISPLAY_TYPE_SDI) {
146 SR(SDI_CONTROL);
147 SR(PLL_CONTROL);
148 }
149
150 dss.ctx_valid = true;
151
152 DSSDBG("context saved\n");
153}
154
155static void dss_restore_context(void)
156{
157 DSSDBG("dss_restore_context\n");
158
159 if (!dss.ctx_valid)
160 return;
161
162 RR(CONTROL);
163
164 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
165 OMAP_DISPLAY_TYPE_SDI) {
166 RR(SDI_CONTROL);
167 RR(PLL_CONTROL);
168 }
169
170 DSSDBG("context restored\n");
171}
172
173#undef SR
174#undef RR
175
176void dss_ctrl_pll_enable(enum dss_pll_id pll_id, bool enable)
177{
178 unsigned shift;
179 unsigned val;
180
181 if (!dss.syscon_pll_ctrl)
182 return;
183
184 val = !enable;
185
186 switch (pll_id) {
187 case DSS_PLL_VIDEO1:
188 shift = 0;
189 break;
190 case DSS_PLL_VIDEO2:
191 shift = 1;
192 break;
193 case DSS_PLL_HDMI:
194 shift = 2;
195 break;
196 default:
197 DSSERR("illegal DSS PLL ID %d\n", pll_id);
198 return;
199 }
200
201 regmap_update_bits(dss.syscon_pll_ctrl, dss.syscon_pll_ctrl_offset,
202 1 << shift, val << shift);
203}
204
205void dss_ctrl_pll_set_control_mux(enum dss_pll_id pll_id,
206 enum omap_channel channel)
207{
208 unsigned shift, val;
209
210 if (!dss.syscon_pll_ctrl)
211 return;
212
213 switch (channel) {
214 case OMAP_DSS_CHANNEL_LCD:
215 shift = 3;
216
217 switch (pll_id) {
218 case DSS_PLL_VIDEO1:
219 val = 0; break;
220 case DSS_PLL_HDMI:
221 val = 1; break;
222 default:
223 DSSERR("error in PLL mux config for LCD\n");
224 return;
225 }
226
227 break;
228 case OMAP_DSS_CHANNEL_LCD2:
229 shift = 5;
230
231 switch (pll_id) {
232 case DSS_PLL_VIDEO1:
233 val = 0; break;
234 case DSS_PLL_VIDEO2:
235 val = 1; break;
236 case DSS_PLL_HDMI:
237 val = 2; break;
238 default:
239 DSSERR("error in PLL mux config for LCD2\n");
240 return;
241 }
242
243 break;
244 case OMAP_DSS_CHANNEL_LCD3:
245 shift = 7;
246
247 switch (pll_id) {
248 case DSS_PLL_VIDEO1:
249 val = 1; break;
250 case DSS_PLL_VIDEO2:
251 val = 0; break;
252 case DSS_PLL_HDMI:
253 val = 2; break;
254 default:
255 DSSERR("error in PLL mux config for LCD3\n");
256 return;
257 }
258
259 break;
260 default:
261 DSSERR("error in PLL mux config\n");
262 return;
263 }
264
265 regmap_update_bits(dss.syscon_pll_ctrl, dss.syscon_pll_ctrl_offset,
266 0x3 << shift, val << shift);
267}
268
269void dss_sdi_init(int datapairs)
270{
271 u32 l;
272
273 BUG_ON(datapairs > 3 || datapairs < 1);
274
275 l = dss_read_reg(DSS_SDI_CONTROL);
276 l = FLD_MOD(l, 0xf, 19, 15); /* SDI_PDIV */
277 l = FLD_MOD(l, datapairs-1, 3, 2); /* SDI_PRSEL */
278 l = FLD_MOD(l, 2, 1, 0); /* SDI_BWSEL */
279 dss_write_reg(DSS_SDI_CONTROL, l);
280
281 l = dss_read_reg(DSS_PLL_CONTROL);
282 l = FLD_MOD(l, 0x7, 25, 22); /* SDI_PLL_FREQSEL */
283 l = FLD_MOD(l, 0xb, 16, 11); /* SDI_PLL_REGN */
284 l = FLD_MOD(l, 0xb4, 10, 1); /* SDI_PLL_REGM */
285 dss_write_reg(DSS_PLL_CONTROL, l);
286}
287
288int dss_sdi_enable(void)
289{
290 unsigned long timeout;
291
292 dispc_pck_free_enable(1);
293
294 /* Reset SDI PLL */
295 REG_FLD_MOD(DSS_PLL_CONTROL, 1, 18, 18); /* SDI_PLL_SYSRESET */
296 udelay(1); /* wait 2x PCLK */
297
298 /* Lock SDI PLL */
299 REG_FLD_MOD(DSS_PLL_CONTROL, 1, 28, 28); /* SDI_PLL_GOBIT */
300
301 /* Waiting for PLL lock request to complete */
302 timeout = jiffies + msecs_to_jiffies(500);
303 while (dss_read_reg(DSS_SDI_STATUS) & (1 << 6)) {
304 if (time_after_eq(jiffies, timeout)) {
305 DSSERR("PLL lock request timed out\n");
306 goto err1;
307 }
308 }
309
310 /* Clearing PLL_GO bit */
311 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 28, 28);
312
313 /* Waiting for PLL to lock */
314 timeout = jiffies + msecs_to_jiffies(500);
315 while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 5))) {
316 if (time_after_eq(jiffies, timeout)) {
317 DSSERR("PLL lock timed out\n");
318 goto err1;
319 }
320 }
321
322 dispc_lcd_enable_signal(1);
323
324 /* Waiting for SDI reset to complete */
325 timeout = jiffies + msecs_to_jiffies(500);
326 while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 2))) {
327 if (time_after_eq(jiffies, timeout)) {
328 DSSERR("SDI reset timed out\n");
329 goto err2;
330 }
331 }
332
333 return 0;
334
335 err2:
336 dispc_lcd_enable_signal(0);
337 err1:
338 /* Reset SDI PLL */
339 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
340
341 dispc_pck_free_enable(0);
342
343 return -ETIMEDOUT;
344}
345
346void dss_sdi_disable(void)
347{
348 dispc_lcd_enable_signal(0);
349
350 dispc_pck_free_enable(0);
351
352 /* Reset SDI PLL */
353 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
354}
355
356const char *dss_get_generic_clk_source_name(enum omap_dss_clk_source clk_src)
357{
358 return dss_generic_clk_source_names[clk_src];
359}
360
361void dss_dump_clocks(struct seq_file *s)
362{
363 const char *fclk_name, *fclk_real_name;
364 unsigned long fclk_rate;
365
366 if (dss_runtime_get())
367 return;
368
369 seq_printf(s, "- DSS -\n");
370
371 fclk_name = dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_FCK);
372 fclk_real_name = dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_FCK);
373 fclk_rate = clk_get_rate(dss.dss_clk);
374
375 seq_printf(s, "%s (%s) = %lu\n",
376 fclk_name, fclk_real_name,
377 fclk_rate);
378
379 dss_runtime_put();
380}
381
382static void dss_dump_regs(struct seq_file *s)
383{
384#define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(r))
385
386 if (dss_runtime_get())
387 return;
388
389 DUMPREG(DSS_REVISION);
390 DUMPREG(DSS_SYSCONFIG);
391 DUMPREG(DSS_SYSSTATUS);
392 DUMPREG(DSS_CONTROL);
393
394 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
395 OMAP_DISPLAY_TYPE_SDI) {
396 DUMPREG(DSS_SDI_CONTROL);
397 DUMPREG(DSS_PLL_CONTROL);
398 DUMPREG(DSS_SDI_STATUS);
399 }
400
401 dss_runtime_put();
402#undef DUMPREG
403}
404
405static void dss_select_dispc_clk_source(enum omap_dss_clk_source clk_src)
406{
407 int b;
408 u8 start, end;
409
410 switch (clk_src) {
411 case OMAP_DSS_CLK_SRC_FCK:
412 b = 0;
413 break;
414 case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC:
415 b = 1;
416 break;
417 case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC:
418 b = 2;
419 break;
420 default:
421 BUG();
422 return;
423 }
424
425 dss_feat_get_reg_field(FEAT_REG_DISPC_CLK_SWITCH, &start, &end);
426
427 REG_FLD_MOD(DSS_CONTROL, b, start, end); /* DISPC_CLK_SWITCH */
428
429 dss.dispc_clk_source = clk_src;
430}
431
432void dss_select_dsi_clk_source(int dsi_module,
433 enum omap_dss_clk_source clk_src)
434{
435 int b, pos;
436
437 switch (clk_src) {
438 case OMAP_DSS_CLK_SRC_FCK:
439 b = 0;
440 break;
441 case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI:
442 BUG_ON(dsi_module != 0);
443 b = 1;
444 break;
445 case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI:
446 BUG_ON(dsi_module != 1);
447 b = 1;
448 break;
449 default:
450 BUG();
451 return;
452 }
453
454 pos = dsi_module == 0 ? 1 : 10;
455 REG_FLD_MOD(DSS_CONTROL, b, pos, pos); /* DSIx_CLK_SWITCH */
456
457 dss.dsi_clk_source[dsi_module] = clk_src;
458}
459
460void dss_select_lcd_clk_source(enum omap_channel channel,
461 enum omap_dss_clk_source clk_src)
462{
463 int b, ix, pos;
464
465 if (!dss_has_feature(FEAT_LCD_CLK_SRC)) {
466 dss_select_dispc_clk_source(clk_src);
467 return;
468 }
469
470 switch (clk_src) {
471 case OMAP_DSS_CLK_SRC_FCK:
472 b = 0;
473 break;
474 case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC:
475 BUG_ON(channel != OMAP_DSS_CHANNEL_LCD);
476 b = 1;
477 break;
478 case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC:
479 BUG_ON(channel != OMAP_DSS_CHANNEL_LCD2 &&
480 channel != OMAP_DSS_CHANNEL_LCD3);
481 b = 1;
482 break;
483 default:
484 BUG();
485 return;
486 }
487
488 pos = channel == OMAP_DSS_CHANNEL_LCD ? 0 :
489 (channel == OMAP_DSS_CHANNEL_LCD2 ? 12 : 19);
490 REG_FLD_MOD(DSS_CONTROL, b, pos, pos); /* LCDx_CLK_SWITCH */
491
492 ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 :
493 (channel == OMAP_DSS_CHANNEL_LCD2 ? 1 : 2);
494 dss.lcd_clk_source[ix] = clk_src;
495}
496
497enum omap_dss_clk_source dss_get_dispc_clk_source(void)
498{
499 return dss.dispc_clk_source;
500}
501
502enum omap_dss_clk_source dss_get_dsi_clk_source(int dsi_module)
503{
504 return dss.dsi_clk_source[dsi_module];
505}
506
507enum omap_dss_clk_source dss_get_lcd_clk_source(enum omap_channel channel)
508{
509 if (dss_has_feature(FEAT_LCD_CLK_SRC)) {
510 int ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 :
511 (channel == OMAP_DSS_CHANNEL_LCD2 ? 1 : 2);
512 return dss.lcd_clk_source[ix];
513 } else {
514 /* LCD_CLK source is the same as DISPC_FCLK source for
515 * OMAP2 and OMAP3 */
516 return dss.dispc_clk_source;
517 }
518}
519
520bool dss_div_calc(unsigned long pck, unsigned long fck_min,
521 dss_div_calc_func func, void *data)
522{
523 int fckd, fckd_start, fckd_stop;
524 unsigned long fck;
525 unsigned long fck_hw_max;
526 unsigned long fckd_hw_max;
527 unsigned long prate;
528 unsigned m;
529
530 fck_hw_max = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK);
531
532 if (dss.parent_clk == NULL) {
533 unsigned pckd;
534
535 pckd = fck_hw_max / pck;
536
537 fck = pck * pckd;
538
539 fck = clk_round_rate(dss.dss_clk, fck);
540
541 return func(fck, data);
542 }
543
544 fckd_hw_max = dss.feat->fck_div_max;
545
546 m = dss.feat->dss_fck_multiplier;
547 prate = clk_get_rate(dss.parent_clk);
548
549 fck_min = fck_min ? fck_min : 1;
550
551 fckd_start = min(prate * m / fck_min, fckd_hw_max);
552 fckd_stop = max(DIV_ROUND_UP(prate * m, fck_hw_max), 1ul);
553
554 for (fckd = fckd_start; fckd >= fckd_stop; --fckd) {
555 fck = DIV_ROUND_UP(prate, fckd) * m;
556
557 if (func(fck, data))
558 return true;
559 }
560
561 return false;
562}
563
564int dss_set_fck_rate(unsigned long rate)
565{
566 int r;
567
568 DSSDBG("set fck to %lu\n", rate);
569
570 r = clk_set_rate(dss.dss_clk, rate);
571 if (r)
572 return r;
573
574 dss.dss_clk_rate = clk_get_rate(dss.dss_clk);
575
576 WARN_ONCE(dss.dss_clk_rate != rate,
577 "clk rate mismatch: %lu != %lu", dss.dss_clk_rate,
578 rate);
579
580 return 0;
581}
582
583unsigned long dss_get_dispc_clk_rate(void)
584{
585 return dss.dss_clk_rate;
586}
587
588static int dss_setup_default_clock(void)
589{
590 unsigned long max_dss_fck, prate;
591 unsigned long fck;
592 unsigned fck_div;
593 int r;
594
595 max_dss_fck = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK);
596
597 if (dss.parent_clk == NULL) {
598 fck = clk_round_rate(dss.dss_clk, max_dss_fck);
599 } else {
600 prate = clk_get_rate(dss.parent_clk);
601
602 fck_div = DIV_ROUND_UP(prate * dss.feat->dss_fck_multiplier,
603 max_dss_fck);
604 fck = DIV_ROUND_UP(prate, fck_div) * dss.feat->dss_fck_multiplier;
605 }
606
607 r = dss_set_fck_rate(fck);
608 if (r)
609 return r;
610
611 return 0;
612}
613
614void dss_set_venc_output(enum omap_dss_venc_type type)
615{
616 int l = 0;
617
618 if (type == OMAP_DSS_VENC_TYPE_COMPOSITE)
619 l = 0;
620 else if (type == OMAP_DSS_VENC_TYPE_SVIDEO)
621 l = 1;
622 else
623 BUG();
624
625 /* venc out selection. 0 = comp, 1 = svideo */
626 REG_FLD_MOD(DSS_CONTROL, l, 6, 6);
627}
628
629void dss_set_dac_pwrdn_bgz(bool enable)
630{
631 REG_FLD_MOD(DSS_CONTROL, enable, 5, 5); /* DAC Power-Down Control */
632}
633
634void dss_select_hdmi_venc_clk_source(enum dss_hdmi_venc_clk_source_select src)
635{
636 enum omap_display_type dp;
637 dp = dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_DIGIT);
638
639 /* Complain about invalid selections */
640 WARN_ON((src == DSS_VENC_TV_CLK) && !(dp & OMAP_DISPLAY_TYPE_VENC));
641 WARN_ON((src == DSS_HDMI_M_PCLK) && !(dp & OMAP_DISPLAY_TYPE_HDMI));
642
643 /* Select only if we have options */
644 if ((dp & OMAP_DISPLAY_TYPE_VENC) && (dp & OMAP_DISPLAY_TYPE_HDMI))
645 REG_FLD_MOD(DSS_CONTROL, src, 15, 15); /* VENC_HDMI_SWITCH */
646}
647
648enum dss_hdmi_venc_clk_source_select dss_get_hdmi_venc_clk_source(void)
649{
650 enum omap_display_type displays;
651
652 displays = dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_DIGIT);
653 if ((displays & OMAP_DISPLAY_TYPE_HDMI) == 0)
654 return DSS_VENC_TV_CLK;
655
656 if ((displays & OMAP_DISPLAY_TYPE_VENC) == 0)
657 return DSS_HDMI_M_PCLK;
658
659 return REG_GET(DSS_CONTROL, 15, 15);
660}
661
662static int dss_dpi_select_source_omap2_omap3(int port, enum omap_channel channel)
663{
664 if (channel != OMAP_DSS_CHANNEL_LCD)
665 return -EINVAL;
666
667 return 0;
668}
669
670static int dss_dpi_select_source_omap4(int port, enum omap_channel channel)
671{
672 int val;
673
674 switch (channel) {
675 case OMAP_DSS_CHANNEL_LCD2:
676 val = 0;
677 break;
678 case OMAP_DSS_CHANNEL_DIGIT:
679 val = 1;
680 break;
681 default:
682 return -EINVAL;
683 }
684
685 REG_FLD_MOD(DSS_CONTROL, val, 17, 17);
686
687 return 0;
688}
689
690static int dss_dpi_select_source_omap5(int port, enum omap_channel channel)
691{
692 int val;
693
694 switch (channel) {
695 case OMAP_DSS_CHANNEL_LCD:
696 val = 1;
697 break;
698 case OMAP_DSS_CHANNEL_LCD2:
699 val = 2;
700 break;
701 case OMAP_DSS_CHANNEL_LCD3:
702 val = 3;
703 break;
704 case OMAP_DSS_CHANNEL_DIGIT:
705 val = 0;
706 break;
707 default:
708 return -EINVAL;
709 }
710
711 REG_FLD_MOD(DSS_CONTROL, val, 17, 16);
712
713 return 0;
714}
715
716static int dss_dpi_select_source_dra7xx(int port, enum omap_channel channel)
717{
718 switch (port) {
719 case 0:
720 return dss_dpi_select_source_omap5(port, channel);
721 case 1:
722 if (channel != OMAP_DSS_CHANNEL_LCD2)
723 return -EINVAL;
724 break;
725 case 2:
726 if (channel != OMAP_DSS_CHANNEL_LCD3)
727 return -EINVAL;
728 break;
729 default:
730 return -EINVAL;
731 }
732
733 return 0;
734}
735
736int dss_dpi_select_source(int port, enum omap_channel channel)
737{
738 return dss.feat->dpi_select_source(port, channel);
739}
740
741static int dss_get_clocks(void)
742{
743 struct clk *clk;
744
745 clk = devm_clk_get(&dss.pdev->dev, "fck");
746 if (IS_ERR(clk)) {
747 DSSERR("can't get clock fck\n");
748 return PTR_ERR(clk);
749 }
750
751 dss.dss_clk = clk;
752
753 if (dss.feat->parent_clk_name) {
754 clk = clk_get(NULL, dss.feat->parent_clk_name);
755 if (IS_ERR(clk)) {
756 DSSERR("Failed to get %s\n", dss.feat->parent_clk_name);
757 return PTR_ERR(clk);
758 }
759 } else {
760 clk = NULL;
761 }
762
763 dss.parent_clk = clk;
764
765 return 0;
766}
767
768static void dss_put_clocks(void)
769{
770 if (dss.parent_clk)
771 clk_put(dss.parent_clk);
772}
773
774int dss_runtime_get(void)
775{
776 int r;
777
778 DSSDBG("dss_runtime_get\n");
779
780 r = pm_runtime_get_sync(&dss.pdev->dev);
781 WARN_ON(r < 0);
782 return r < 0 ? r : 0;
783}
784
785void dss_runtime_put(void)
786{
787 int r;
788
789 DSSDBG("dss_runtime_put\n");
790
791 r = pm_runtime_put_sync(&dss.pdev->dev);
792 WARN_ON(r < 0 && r != -ENOSYS && r != -EBUSY);
793}
794
795/* DEBUGFS */
796#if defined(CONFIG_OMAP2_DSS_DEBUGFS)
797void dss_debug_dump_clocks(struct seq_file *s)
798{
799 dss_dump_clocks(s);
800 dispc_dump_clocks(s);
801#ifdef CONFIG_OMAP2_DSS_DSI
802 dsi_dump_clocks(s);
803#endif
804}
805#endif
806
807
808static const enum omap_display_type omap2plus_ports[] = {
809 OMAP_DISPLAY_TYPE_DPI,
810};
811
812static const enum omap_display_type omap34xx_ports[] = {
813 OMAP_DISPLAY_TYPE_DPI,
814 OMAP_DISPLAY_TYPE_SDI,
815};
816
817static const enum omap_display_type dra7xx_ports[] = {
818 OMAP_DISPLAY_TYPE_DPI,
819 OMAP_DISPLAY_TYPE_DPI,
820 OMAP_DISPLAY_TYPE_DPI,
821};
822
823static const struct dss_features omap24xx_dss_feats = {
824 /*
825 * fck div max is really 16, but the divider range has gaps. The range
826 * from 1 to 6 has no gaps, so let's use that as a max.
827 */
828 .fck_div_max = 6,
829 .dss_fck_multiplier = 2,
830 .parent_clk_name = "core_ck",
831 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
832 .ports = omap2plus_ports,
833 .num_ports = ARRAY_SIZE(omap2plus_ports),
834};
835
836static const struct dss_features omap34xx_dss_feats = {
837 .fck_div_max = 16,
838 .dss_fck_multiplier = 2,
839 .parent_clk_name = "dpll4_ck",
840 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
841 .ports = omap34xx_ports,
842 .num_ports = ARRAY_SIZE(omap34xx_ports),
843};
844
845static const struct dss_features omap3630_dss_feats = {
846 .fck_div_max = 32,
847 .dss_fck_multiplier = 1,
848 .parent_clk_name = "dpll4_ck",
849 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
850 .ports = omap2plus_ports,
851 .num_ports = ARRAY_SIZE(omap2plus_ports),
852};
853
854static const struct dss_features omap44xx_dss_feats = {
855 .fck_div_max = 32,
856 .dss_fck_multiplier = 1,
857 .parent_clk_name = "dpll_per_x2_ck",
858 .dpi_select_source = &dss_dpi_select_source_omap4,
859 .ports = omap2plus_ports,
860 .num_ports = ARRAY_SIZE(omap2plus_ports),
861};
862
863static const struct dss_features omap54xx_dss_feats = {
864 .fck_div_max = 64,
865 .dss_fck_multiplier = 1,
866 .parent_clk_name = "dpll_per_x2_ck",
867 .dpi_select_source = &dss_dpi_select_source_omap5,
868 .ports = omap2plus_ports,
869 .num_ports = ARRAY_SIZE(omap2plus_ports),
870};
871
872static const struct dss_features am43xx_dss_feats = {
873 .fck_div_max = 0,
874 .dss_fck_multiplier = 0,
875 .parent_clk_name = NULL,
876 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
877 .ports = omap2plus_ports,
878 .num_ports = ARRAY_SIZE(omap2plus_ports),
879};
880
881static const struct dss_features dra7xx_dss_feats = {
882 .fck_div_max = 64,
883 .dss_fck_multiplier = 1,
884 .parent_clk_name = "dpll_per_x2_ck",
885 .dpi_select_source = &dss_dpi_select_source_dra7xx,
886 .ports = dra7xx_ports,
887 .num_ports = ARRAY_SIZE(dra7xx_ports),
888};
889
890static int dss_init_features(struct platform_device *pdev)
891{
892 const struct dss_features *src;
893 struct dss_features *dst;
894
895 dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL);
896 if (!dst) {
897 dev_err(&pdev->dev, "Failed to allocate local DSS Features\n");
898 return -ENOMEM;
899 }
900
901 switch (omapdss_get_version()) {
902 case OMAPDSS_VER_OMAP24xx:
903 src = &omap24xx_dss_feats;
904 break;
905
906 case OMAPDSS_VER_OMAP34xx_ES1:
907 case OMAPDSS_VER_OMAP34xx_ES3:
908 case OMAPDSS_VER_AM35xx:
909 src = &omap34xx_dss_feats;
910 break;
911
912 case OMAPDSS_VER_OMAP3630:
913 src = &omap3630_dss_feats;
914 break;
915
916 case OMAPDSS_VER_OMAP4430_ES1:
917 case OMAPDSS_VER_OMAP4430_ES2:
918 case OMAPDSS_VER_OMAP4:
919 src = &omap44xx_dss_feats;
920 break;
921
922 case OMAPDSS_VER_OMAP5:
923 src = &omap54xx_dss_feats;
924 break;
925
926 case OMAPDSS_VER_AM43xx:
927 src = &am43xx_dss_feats;
928 break;
929
930 case OMAPDSS_VER_DRA7xx:
931 src = &dra7xx_dss_feats;
932 break;
933
934 default:
935 return -ENODEV;
936 }
937
938 memcpy(dst, src, sizeof(*dst));
939 dss.feat = dst;
940
941 return 0;
942}
943
944static int dss_init_ports(struct platform_device *pdev)
945{
946 struct device_node *parent = pdev->dev.of_node;
947 struct device_node *port;
948 int r;
949
950 if (parent == NULL)
951 return 0;
952
953 port = omapdss_of_get_next_port(parent, NULL);
954 if (!port)
955 return 0;
956
957 if (dss.feat->num_ports == 0)
958 return 0;
959
960 do {
961 enum omap_display_type port_type;
962 u32 reg;
963
964 r = of_property_read_u32(port, "reg", &reg);
965 if (r)
966 reg = 0;
967
968 if (reg >= dss.feat->num_ports)
969 continue;
970
971 port_type = dss.feat->ports[reg];
972
973 switch (port_type) {
974 case OMAP_DISPLAY_TYPE_DPI:
975 dpi_init_port(pdev, port);
976 break;
977 case OMAP_DISPLAY_TYPE_SDI:
978 sdi_init_port(pdev, port);
979 break;
980 default:
981 break;
982 }
983 } while ((port = omapdss_of_get_next_port(parent, port)) != NULL);
984
985 return 0;
986}
987
988static void dss_uninit_ports(struct platform_device *pdev)
989{
990 struct device_node *parent = pdev->dev.of_node;
991 struct device_node *port;
992
993 if (parent == NULL)
994 return;
995
996 port = omapdss_of_get_next_port(parent, NULL);
997 if (!port)
998 return;
999
1000 if (dss.feat->num_ports == 0)
1001 return;
1002
1003 do {
1004 enum omap_display_type port_type;
1005 u32 reg;
1006 int r;
1007
1008 r = of_property_read_u32(port, "reg", &reg);
1009 if (r)
1010 reg = 0;
1011
1012 if (reg >= dss.feat->num_ports)
1013 continue;
1014
1015 port_type = dss.feat->ports[reg];
1016
1017 switch (port_type) {
1018 case OMAP_DISPLAY_TYPE_DPI:
1019 dpi_uninit_port(port);
1020 break;
1021 case OMAP_DISPLAY_TYPE_SDI:
1022 sdi_uninit_port(port);
1023 break;
1024 default:
1025 break;
1026 }
1027 } while ((port = omapdss_of_get_next_port(parent, port)) != NULL);
1028}
1029
1030static int dss_video_pll_probe(struct platform_device *pdev)
1031{
1032 struct device_node *np = pdev->dev.of_node;
1033 struct regulator *pll_regulator;
1034 int r;
1035
1036 if (!np)
1037 return 0;
1038
1039 if (of_property_read_bool(np, "syscon-pll-ctrl")) {
1040 dss.syscon_pll_ctrl = syscon_regmap_lookup_by_phandle(np,
1041 "syscon-pll-ctrl");
1042 if (IS_ERR(dss.syscon_pll_ctrl)) {
1043 dev_err(&pdev->dev,
1044 "failed to get syscon-pll-ctrl regmap\n");
1045 return PTR_ERR(dss.syscon_pll_ctrl);
1046 }
1047
1048 if (of_property_read_u32_index(np, "syscon-pll-ctrl", 1,
1049 &dss.syscon_pll_ctrl_offset)) {
1050 dev_err(&pdev->dev,
1051 "failed to get syscon-pll-ctrl offset\n");
1052 return -EINVAL;
1053 }
1054 }
1055
1056 pll_regulator = devm_regulator_get(&pdev->dev, "vdda_video");
1057 if (IS_ERR(pll_regulator)) {
1058 r = PTR_ERR(pll_regulator);
1059
1060 switch (r) {
1061 case -ENOENT:
1062 pll_regulator = NULL;
1063 break;
1064
1065 case -EPROBE_DEFER:
1066 return -EPROBE_DEFER;
1067
1068 default:
1069 DSSERR("can't get DPLL VDDA regulator\n");
1070 return r;
1071 }
1072 }
1073
1074 if (of_property_match_string(np, "reg-names", "pll1") >= 0) {
1075 dss.video1_pll = dss_video_pll_init(pdev, 0, pll_regulator);
1076 if (IS_ERR(dss.video1_pll))
1077 return PTR_ERR(dss.video1_pll);
1078 }
1079
1080 if (of_property_match_string(np, "reg-names", "pll2") >= 0) {
1081 dss.video2_pll = dss_video_pll_init(pdev, 1, pll_regulator);
1082 if (IS_ERR(dss.video2_pll)) {
1083 dss_video_pll_uninit(dss.video1_pll);
1084 return PTR_ERR(dss.video2_pll);
1085 }
1086 }
1087
1088 return 0;
1089}
1090
1091/* DSS HW IP initialisation */
1092static int dss_bind(struct device *dev)
1093{
1094 struct platform_device *pdev = to_platform_device(dev);
1095 struct resource *dss_mem;
1096 u32 rev;
1097 int r;
1098
1099 dss.pdev = pdev;
1100
1101 r = dss_init_features(dss.pdev);
1102 if (r)
1103 return r;
1104
1105 dss_mem = platform_get_resource(dss.pdev, IORESOURCE_MEM, 0);
1106 if (!dss_mem) {
1107 DSSERR("can't get IORESOURCE_MEM DSS\n");
1108 return -EINVAL;
1109 }
1110
1111 dss.base = devm_ioremap(&pdev->dev, dss_mem->start,
1112 resource_size(dss_mem));
1113 if (!dss.base) {
1114 DSSERR("can't ioremap DSS\n");
1115 return -ENOMEM;
1116 }
1117
1118 r = dss_get_clocks();
1119 if (r)
1120 return r;
1121
1122 r = dss_setup_default_clock();
1123 if (r)
1124 goto err_setup_clocks;
1125
1126 r = dss_video_pll_probe(pdev);
1127 if (r)
1128 goto err_pll_init;
1129
1130 r = dss_init_ports(pdev);
1131 if (r)
1132 goto err_init_ports;
1133
1134 pm_runtime_enable(&pdev->dev);
1135
1136 r = dss_runtime_get();
1137 if (r)
1138 goto err_runtime_get;
1139
1140 dss.dss_clk_rate = clk_get_rate(dss.dss_clk);
1141
1142 /* Select DPLL */
1143 REG_FLD_MOD(DSS_CONTROL, 0, 0, 0);
1144
1145 dss_select_dispc_clk_source(OMAP_DSS_CLK_SRC_FCK);
1146
1147#ifdef CONFIG_OMAP2_DSS_VENC
1148 REG_FLD_MOD(DSS_CONTROL, 1, 4, 4); /* venc dac demen */
1149 REG_FLD_MOD(DSS_CONTROL, 1, 3, 3); /* venc clock 4x enable */
1150 REG_FLD_MOD(DSS_CONTROL, 0, 2, 2); /* venc clock mode = normal */
1151#endif
1152 dss.dsi_clk_source[0] = OMAP_DSS_CLK_SRC_FCK;
1153 dss.dsi_clk_source[1] = OMAP_DSS_CLK_SRC_FCK;
1154 dss.dispc_clk_source = OMAP_DSS_CLK_SRC_FCK;
1155 dss.lcd_clk_source[0] = OMAP_DSS_CLK_SRC_FCK;
1156 dss.lcd_clk_source[1] = OMAP_DSS_CLK_SRC_FCK;
1157
1158 rev = dss_read_reg(DSS_REVISION);
1159 printk(KERN_INFO "OMAP DSS rev %d.%d\n",
1160 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
1161
1162 dss_runtime_put();
1163
1164 r = component_bind_all(&pdev->dev, NULL);
1165 if (r)
1166 goto err_component;
1167
1168 dss_debugfs_create_file("dss", dss_dump_regs);
1169
1170 pm_set_vt_switch(0);
1171
1172 dss_initialized = true;
1173
1174 return 0;
1175
1176err_component:
1177err_runtime_get:
1178 pm_runtime_disable(&pdev->dev);
1179 dss_uninit_ports(pdev);
1180err_init_ports:
1181 if (dss.video1_pll)
1182 dss_video_pll_uninit(dss.video1_pll);
1183
1184 if (dss.video2_pll)
1185 dss_video_pll_uninit(dss.video2_pll);
1186err_pll_init:
1187err_setup_clocks:
1188 dss_put_clocks();
1189 return r;
1190}
1191
1192static void dss_unbind(struct device *dev)
1193{
1194 struct platform_device *pdev = to_platform_device(dev);
1195
1196 dss_initialized = false;
1197
1198 component_unbind_all(&pdev->dev, NULL);
1199
1200 if (dss.video1_pll)
1201 dss_video_pll_uninit(dss.video1_pll);
1202
1203 if (dss.video2_pll)
1204 dss_video_pll_uninit(dss.video2_pll);
1205
1206 dss_uninit_ports(pdev);
1207
1208 pm_runtime_disable(&pdev->dev);
1209
1210 dss_put_clocks();
1211}
1212
1213static const struct component_master_ops dss_component_ops = {
1214 .bind = dss_bind,
1215 .unbind = dss_unbind,
1216};
1217
1218static int dss_component_compare(struct device *dev, void *data)
1219{
1220 struct device *child = data;
1221 return dev == child;
1222}
1223
1224static int dss_add_child_component(struct device *dev, void *data)
1225{
1226 struct component_match **match = data;
1227
1228 /*
1229 * HACK
1230 * We don't have a working driver for rfbi, so skip it here always.
1231 * Otherwise dss will never get probed successfully, as it will wait
1232 * for rfbi to get probed.
1233 */
1234 if (strstr(dev_name(dev), "rfbi"))
1235 return 0;
1236
1237 component_match_add(dev->parent, match, dss_component_compare, dev);
1238
1239 return 0;
1240}
1241
1242static int dss_probe(struct platform_device *pdev)
1243{
1244 struct component_match *match = NULL;
1245 int r;
1246
1247 /* add all the child devices as components */
1248 device_for_each_child(&pdev->dev, &match, dss_add_child_component);
1249
1250 r = component_master_add_with_match(&pdev->dev, &dss_component_ops, match);
1251 if (r)
1252 return r;
1253
1254 return 0;
1255}
1256
1257static int dss_remove(struct platform_device *pdev)
1258{
1259 component_master_del(&pdev->dev, &dss_component_ops);
1260 return 0;
1261}
1262
1263static int dss_runtime_suspend(struct device *dev)
1264{
1265 dss_save_context();
1266 dss_set_min_bus_tput(dev, 0);
1267
1268 pinctrl_pm_select_sleep_state(dev);
1269
1270 return 0;
1271}
1272
1273static int dss_runtime_resume(struct device *dev)
1274{
1275 int r;
1276
1277 pinctrl_pm_select_default_state(dev);
1278
1279 /*
1280 * Set an arbitrarily high tput request to ensure OPP100.
1281 * What we should really do is to make a request to stay in OPP100,
1282 * without any tput requirements, but that is not currently possible
1283 * via the PM layer.
1284 */
1285
1286 r = dss_set_min_bus_tput(dev, 1000000000);
1287 if (r)
1288 return r;
1289
1290 dss_restore_context();
1291 return 0;
1292}
1293
1294static const struct dev_pm_ops dss_pm_ops = {
1295 .runtime_suspend = dss_runtime_suspend,
1296 .runtime_resume = dss_runtime_resume,
1297};
1298
1299static const struct of_device_id dss_of_match[] = {
1300 { .compatible = "ti,omap2-dss", },
1301 { .compatible = "ti,omap3-dss", },
1302 { .compatible = "ti,omap4-dss", },
1303 { .compatible = "ti,omap5-dss", },
1304 { .compatible = "ti,dra7-dss", },
1305 {},
1306};
1307
1308MODULE_DEVICE_TABLE(of, dss_of_match);
1309
1310static struct platform_driver omap_dsshw_driver = {
1311 .probe = dss_probe,
1312 .remove = dss_remove,
1313 .driver = {
1314 .name = "omapdss_dss",
1315 .pm = &dss_pm_ops,
1316 .of_match_table = dss_of_match,
1317 .suppress_bind_attrs = true,
1318 },
1319};
1320
1321int __init dss_init_platform_driver(void)
1322{
1323 return platform_driver_register(&omap_dsshw_driver);
1324}
1325
1326void dss_uninit_platform_driver(void)
1327{
1328 platform_driver_unregister(&omap_dsshw_driver);
1329}
generated by cgit v1.2.2 (git 2.25.0) at 2025-04-25 13:45:28 -0400