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1/*
2 * Copyright (C) 2009 Nokia Corporation
3 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
4 *
5 * Some code and ideas taken from drivers/video/omap/ driver
6 * by Imre Deak.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published by
10 * the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21#define DSS_SUBSYS_NAME "DSS"
22
23#include <linux/debugfs.h>
24#include <linux/dma-mapping.h>
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/of_device.h>
42#include <linux/of_graph.h>
43#include <linux/regulator/consumer.h>
44#include <linux/suspend.h>
45#include <linux/component.h>
46#include <linux/sys_soc.h>
47
48#include "omapdss.h"
49#include "dss.h"
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(dss, idx, start, end) \
66 FLD_GET(dss_read_reg(dss, idx), start, end)
67
68#define REG_FLD_MOD(dss, idx, val, start, end) \
69 dss_write_reg(dss, idx, \
70 FLD_MOD(dss_read_reg(dss, idx), val, start, end))
71
72struct dss_ops {
73 int (*dpi_select_source)(struct dss_device *dss, int port,
74 enum omap_channel channel);
75 int (*select_lcd_source)(struct dss_device *dss,
76 enum omap_channel channel,
77 enum dss_clk_source clk_src);
78};
79
80struct dss_features {
81 enum dss_model model;
82 u8 fck_div_max;
83 unsigned int fck_freq_max;
84 u8 dss_fck_multiplier;
85 const char *parent_clk_name;
86 const enum omap_display_type *ports;
87 int num_ports;
88 const enum omap_dss_output_id *outputs;
89 const struct dss_ops *ops;
90 struct dss_reg_field dispc_clk_switch;
91 bool has_lcd_clk_src;
92};
93
94static const char * const dss_generic_clk_source_names[] = {
95 [DSS_CLK_SRC_FCK] = "FCK",
96 [DSS_CLK_SRC_PLL1_1] = "PLL1:1",
97 [DSS_CLK_SRC_PLL1_2] = "PLL1:2",
98 [DSS_CLK_SRC_PLL1_3] = "PLL1:3",
99 [DSS_CLK_SRC_PLL2_1] = "PLL2:1",
100 [DSS_CLK_SRC_PLL2_2] = "PLL2:2",
101 [DSS_CLK_SRC_PLL2_3] = "PLL2:3",
102 [DSS_CLK_SRC_HDMI_PLL] = "HDMI PLL",
103};
104
105static inline void dss_write_reg(struct dss_device *dss,
106 const struct dss_reg idx, u32 val)
107{
108 __raw_writel(val, dss->base + idx.idx);
109}
110
111static inline u32 dss_read_reg(struct dss_device *dss, const struct dss_reg idx)
112{
113 return __raw_readl(dss->base + idx.idx);
114}
115
116#define SR(dss, reg) \
117 dss->ctx[(DSS_##reg).idx / sizeof(u32)] = dss_read_reg(dss, DSS_##reg)
118#define RR(dss, reg) \
119 dss_write_reg(dss, DSS_##reg, dss->ctx[(DSS_##reg).idx / sizeof(u32)])
120
121static void dss_save_context(struct dss_device *dss)
122{
123 DSSDBG("dss_save_context\n");
124
125 SR(dss, CONTROL);
126
127 if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) {
128 SR(dss, SDI_CONTROL);
129 SR(dss, PLL_CONTROL);
130 }
131
132 dss->ctx_valid = true;
133
134 DSSDBG("context saved\n");
135}
136
137static void dss_restore_context(struct dss_device *dss)
138{
139 DSSDBG("dss_restore_context\n");
140
141 if (!dss->ctx_valid)
142 return;
143
144 RR(dss, CONTROL);
145
146 if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) {
147 RR(dss, SDI_CONTROL);
148 RR(dss, PLL_CONTROL);
149 }
150
151 DSSDBG("context restored\n");
152}
153
154#undef SR
155#undef RR
156
157void dss_ctrl_pll_enable(struct dss_pll *pll, bool enable)
158{
159 unsigned int shift;
160 unsigned int val;
161
162 if (!pll->dss->syscon_pll_ctrl)
163 return;
164
165 val = !enable;
166
167 switch (pll->id) {
168 case DSS_PLL_VIDEO1:
169 shift = 0;
170 break;
171 case DSS_PLL_VIDEO2:
172 shift = 1;
173 break;
174 case DSS_PLL_HDMI:
175 shift = 2;
176 break;
177 default:
178 DSSERR("illegal DSS PLL ID %d\n", pll->id);
179 return;
180 }
181
182 regmap_update_bits(pll->dss->syscon_pll_ctrl,
183 pll->dss->syscon_pll_ctrl_offset,
184 1 << shift, val << shift);
185}
186
187static int dss_ctrl_pll_set_control_mux(struct dss_device *dss,
188 enum dss_clk_source clk_src,
189 enum omap_channel channel)
190{
191 unsigned int shift, val;
192
193 if (!dss->syscon_pll_ctrl)
194 return -EINVAL;
195
196 switch (channel) {
197 case OMAP_DSS_CHANNEL_LCD:
198 shift = 3;
199
200 switch (clk_src) {
201 case DSS_CLK_SRC_PLL1_1:
202 val = 0; break;
203 case DSS_CLK_SRC_HDMI_PLL:
204 val = 1; break;
205 default:
206 DSSERR("error in PLL mux config for LCD\n");
207 return -EINVAL;
208 }
209
210 break;
211 case OMAP_DSS_CHANNEL_LCD2:
212 shift = 5;
213
214 switch (clk_src) {
215 case DSS_CLK_SRC_PLL1_3:
216 val = 0; break;
217 case DSS_CLK_SRC_PLL2_3:
218 val = 1; break;
219 case DSS_CLK_SRC_HDMI_PLL:
220 val = 2; break;
221 default:
222 DSSERR("error in PLL mux config for LCD2\n");
223 return -EINVAL;
224 }
225
226 break;
227 case OMAP_DSS_CHANNEL_LCD3:
228 shift = 7;
229
230 switch (clk_src) {
231 case DSS_CLK_SRC_PLL2_1:
232 val = 0; break;
233 case DSS_CLK_SRC_PLL1_3:
234 val = 1; break;
235 case DSS_CLK_SRC_HDMI_PLL:
236 val = 2; break;
237 default:
238 DSSERR("error in PLL mux config for LCD3\n");
239 return -EINVAL;
240 }
241
242 break;
243 default:
244 DSSERR("error in PLL mux config\n");
245 return -EINVAL;
246 }
247
248 regmap_update_bits(dss->syscon_pll_ctrl, dss->syscon_pll_ctrl_offset,
249 0x3 << shift, val << shift);
250
251 return 0;
252}
253
254void dss_sdi_init(struct dss_device *dss, int datapairs)
255{
256 u32 l;
257
258 BUG_ON(datapairs > 3 || datapairs < 1);
259
260 l = dss_read_reg(dss, DSS_SDI_CONTROL);
261 l = FLD_MOD(l, 0xf, 19, 15); /* SDI_PDIV */
262 l = FLD_MOD(l, datapairs-1, 3, 2); /* SDI_PRSEL */
263 l = FLD_MOD(l, 2, 1, 0); /* SDI_BWSEL */
264 dss_write_reg(dss, DSS_SDI_CONTROL, l);
265
266 l = dss_read_reg(dss, DSS_PLL_CONTROL);
267 l = FLD_MOD(l, 0x7, 25, 22); /* SDI_PLL_FREQSEL */
268 l = FLD_MOD(l, 0xb, 16, 11); /* SDI_PLL_REGN */
269 l = FLD_MOD(l, 0xb4, 10, 1); /* SDI_PLL_REGM */
270 dss_write_reg(dss, DSS_PLL_CONTROL, l);
271}
272
273int dss_sdi_enable(struct dss_device *dss)
274{
275 unsigned long timeout;
276
277 dispc_pck_free_enable(dss->dispc, 1);
278
279 /* Reset SDI PLL */
280 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 1, 18, 18); /* SDI_PLL_SYSRESET */
281 udelay(1); /* wait 2x PCLK */
282
283 /* Lock SDI PLL */
284 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 1, 28, 28); /* SDI_PLL_GOBIT */
285
286 /* Waiting for PLL lock request to complete */
287 timeout = jiffies + msecs_to_jiffies(500);
288 while (dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 6)) {
289 if (time_after_eq(jiffies, timeout)) {
290 DSSERR("PLL lock request timed out\n");
291 goto err1;
292 }
293 }
294
295 /* Clearing PLL_GO bit */
296 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 28, 28);
297
298 /* Waiting for PLL to lock */
299 timeout = jiffies + msecs_to_jiffies(500);
300 while (!(dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 5))) {
301 if (time_after_eq(jiffies, timeout)) {
302 DSSERR("PLL lock timed out\n");
303 goto err1;
304 }
305 }
306
307 dispc_lcd_enable_signal(dss->dispc, 1);
308
309 /* Waiting for SDI reset to complete */
310 timeout = jiffies + msecs_to_jiffies(500);
311 while (!(dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 2))) {
312 if (time_after_eq(jiffies, timeout)) {
313 DSSERR("SDI reset timed out\n");
314 goto err2;
315 }
316 }
317
318 return 0;
319
320 err2:
321 dispc_lcd_enable_signal(dss->dispc, 0);
322 err1:
323 /* Reset SDI PLL */
324 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
325
326 dispc_pck_free_enable(dss->dispc, 0);
327
328 return -ETIMEDOUT;
329}
330
331void dss_sdi_disable(struct dss_device *dss)
332{
333 dispc_lcd_enable_signal(dss->dispc, 0);
334
335 dispc_pck_free_enable(dss->dispc, 0);
336
337 /* Reset SDI PLL */
338 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
339}
340
341const char *dss_get_clk_source_name(enum dss_clk_source clk_src)
342{
343 return dss_generic_clk_source_names[clk_src];
344}
345
346static void dss_dump_clocks(struct dss_device *dss, struct seq_file *s)
347{
348 const char *fclk_name;
349 unsigned long fclk_rate;
350
351 if (dss_runtime_get(dss))
352 return;
353
354 seq_printf(s, "- DSS -\n");
355
356 fclk_name = dss_get_clk_source_name(DSS_CLK_SRC_FCK);
357 fclk_rate = clk_get_rate(dss->dss_clk);
358
359 seq_printf(s, "%s = %lu\n",
360 fclk_name,
361 fclk_rate);
362
363 dss_runtime_put(dss);
364}
365
366static int dss_dump_regs(struct seq_file *s, void *p)
367{
368 struct dss_device *dss = s->private;
369
370#define DUMPREG(dss, r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(dss, r))
371
372 if (dss_runtime_get(dss))
373 return 0;
374
375 DUMPREG(dss, DSS_REVISION);
376 DUMPREG(dss, DSS_SYSCONFIG);
377 DUMPREG(dss, DSS_SYSSTATUS);
378 DUMPREG(dss, DSS_CONTROL);
379
380 if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) {
381 DUMPREG(dss, DSS_SDI_CONTROL);
382 DUMPREG(dss, DSS_PLL_CONTROL);
383 DUMPREG(dss, DSS_SDI_STATUS);
384 }
385
386 dss_runtime_put(dss);
387#undef DUMPREG
388 return 0;
389}
390
391static int dss_debug_dump_clocks(struct seq_file *s, void *p)
392{
393 struct dss_device *dss = s->private;
394
395 dss_dump_clocks(dss, s);
396 dispc_dump_clocks(dss->dispc, s);
397#ifdef CONFIG_OMAP2_DSS_DSI
398 dsi_dump_clocks(s);
399#endif
400 return 0;
401}
402
403static int dss_get_channel_index(enum omap_channel channel)
404{
405 switch (channel) {
406 case OMAP_DSS_CHANNEL_LCD:
407 return 0;
408 case OMAP_DSS_CHANNEL_LCD2:
409 return 1;
410 case OMAP_DSS_CHANNEL_LCD3:
411 return 2;
412 default:
413 WARN_ON(1);
414 return 0;
415 }
416}
417
418static void dss_select_dispc_clk_source(struct dss_device *dss,
419 enum dss_clk_source clk_src)
420{
421 int b;
422
423 /*
424 * We always use PRCM clock as the DISPC func clock, except on DSS3,
425 * where we don't have separate DISPC and LCD clock sources.
426 */
427 if (WARN_ON(dss->feat->has_lcd_clk_src && clk_src != DSS_CLK_SRC_FCK))
428 return;
429
430 switch (clk_src) {
431 case DSS_CLK_SRC_FCK:
432 b = 0;
433 break;
434 case DSS_CLK_SRC_PLL1_1:
435 b = 1;
436 break;
437 case DSS_CLK_SRC_PLL2_1:
438 b = 2;
439 break;
440 default:
441 BUG();
442 return;
443 }
444
445 REG_FLD_MOD(dss, DSS_CONTROL, b, /* DISPC_CLK_SWITCH */
446 dss->feat->dispc_clk_switch.start,
447 dss->feat->dispc_clk_switch.end);
448
449 dss->dispc_clk_source = clk_src;
450}
451
452void dss_select_dsi_clk_source(struct dss_device *dss, int dsi_module,
453 enum dss_clk_source clk_src)
454{
455 int b, pos;
456
457 switch (clk_src) {
458 case DSS_CLK_SRC_FCK:
459 b = 0;
460 break;
461 case DSS_CLK_SRC_PLL1_2:
462 BUG_ON(dsi_module != 0);
463 b = 1;
464 break;
465 case DSS_CLK_SRC_PLL2_2:
466 BUG_ON(dsi_module != 1);
467 b = 1;
468 break;
469 default:
470 BUG();
471 return;
472 }
473
474 pos = dsi_module == 0 ? 1 : 10;
475 REG_FLD_MOD(dss, DSS_CONTROL, b, pos, pos); /* DSIx_CLK_SWITCH */
476
477 dss->dsi_clk_source[dsi_module] = clk_src;
478}
479
480static int dss_lcd_clk_mux_dra7(struct dss_device *dss,
481 enum omap_channel channel,
482 enum dss_clk_source clk_src)
483{
484 const u8 ctrl_bits[] = {
485 [OMAP_DSS_CHANNEL_LCD] = 0,
486 [OMAP_DSS_CHANNEL_LCD2] = 12,
487 [OMAP_DSS_CHANNEL_LCD3] = 19,
488 };
489
490 u8 ctrl_bit = ctrl_bits[channel];
491 int r;
492
493 if (clk_src == DSS_CLK_SRC_FCK) {
494 /* LCDx_CLK_SWITCH */
495 REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
496 return -EINVAL;
497 }
498
499 r = dss_ctrl_pll_set_control_mux(dss, clk_src, channel);
500 if (r)
501 return r;
502
503 REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
504
505 return 0;
506}
507
508static int dss_lcd_clk_mux_omap5(struct dss_device *dss,
509 enum omap_channel channel,
510 enum dss_clk_source clk_src)
511{
512 const u8 ctrl_bits[] = {
513 [OMAP_DSS_CHANNEL_LCD] = 0,
514 [OMAP_DSS_CHANNEL_LCD2] = 12,
515 [OMAP_DSS_CHANNEL_LCD3] = 19,
516 };
517 const enum dss_clk_source allowed_plls[] = {
518 [OMAP_DSS_CHANNEL_LCD] = DSS_CLK_SRC_PLL1_1,
519 [OMAP_DSS_CHANNEL_LCD2] = DSS_CLK_SRC_FCK,
520 [OMAP_DSS_CHANNEL_LCD3] = DSS_CLK_SRC_PLL2_1,
521 };
522
523 u8 ctrl_bit = ctrl_bits[channel];
524
525 if (clk_src == DSS_CLK_SRC_FCK) {
526 /* LCDx_CLK_SWITCH */
527 REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
528 return -EINVAL;
529 }
530
531 if (WARN_ON(allowed_plls[channel] != clk_src))
532 return -EINVAL;
533
534 REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
535
536 return 0;
537}
538
539static int dss_lcd_clk_mux_omap4(struct dss_device *dss,
540 enum omap_channel channel,
541 enum dss_clk_source clk_src)
542{
543 const u8 ctrl_bits[] = {
544 [OMAP_DSS_CHANNEL_LCD] = 0,
545 [OMAP_DSS_CHANNEL_LCD2] = 12,
546 };
547 const enum dss_clk_source allowed_plls[] = {
548 [OMAP_DSS_CHANNEL_LCD] = DSS_CLK_SRC_PLL1_1,
549 [OMAP_DSS_CHANNEL_LCD2] = DSS_CLK_SRC_PLL2_1,
550 };
551
552 u8 ctrl_bit = ctrl_bits[channel];
553
554 if (clk_src == DSS_CLK_SRC_FCK) {
555 /* LCDx_CLK_SWITCH */
556 REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
557 return 0;
558 }
559
560 if (WARN_ON(allowed_plls[channel] != clk_src))
561 return -EINVAL;
562
563 REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
564
565 return 0;
566}
567
568void dss_select_lcd_clk_source(struct dss_device *dss,
569 enum omap_channel channel,
570 enum dss_clk_source clk_src)
571{
572 int idx = dss_get_channel_index(channel);
573 int r;
574
575 if (!dss->feat->has_lcd_clk_src) {
576 dss_select_dispc_clk_source(dss, clk_src);
577 dss->lcd_clk_source[idx] = clk_src;
578 return;
579 }
580
581 r = dss->feat->ops->select_lcd_source(dss, channel, clk_src);
582 if (r)
583 return;
584
585 dss->lcd_clk_source[idx] = clk_src;
586}
587
588enum dss_clk_source dss_get_dispc_clk_source(struct dss_device *dss)
589{
590 return dss->dispc_clk_source;
591}
592
593enum dss_clk_source dss_get_dsi_clk_source(struct dss_device *dss,
594 int dsi_module)
595{
596 return dss->dsi_clk_source[dsi_module];
597}
598
599enum dss_clk_source dss_get_lcd_clk_source(struct dss_device *dss,
600 enum omap_channel channel)
601{
602 if (dss->feat->has_lcd_clk_src) {
603 int idx = dss_get_channel_index(channel);
604 return dss->lcd_clk_source[idx];
605 } else {
606 /* LCD_CLK source is the same as DISPC_FCLK source for
607 * OMAP2 and OMAP3 */
608 return dss->dispc_clk_source;
609 }
610}
611
612bool dss_div_calc(struct dss_device *dss, unsigned long pck,
613 unsigned long fck_min, dss_div_calc_func func, void *data)
614{
615 int fckd, fckd_start, fckd_stop;
616 unsigned long fck;
617 unsigned long fck_hw_max;
618 unsigned long fckd_hw_max;
619 unsigned long prate;
620 unsigned int m;
621
622 fck_hw_max = dss->feat->fck_freq_max;
623
624 if (dss->parent_clk == NULL) {
625 unsigned int pckd;
626
627 pckd = fck_hw_max / pck;
628
629 fck = pck * pckd;
630
631 fck = clk_round_rate(dss->dss_clk, fck);
632
633 return func(fck, data);
634 }
635
636 fckd_hw_max = dss->feat->fck_div_max;
637
638 m = dss->feat->dss_fck_multiplier;
639 prate = clk_get_rate(dss->parent_clk);
640
641 fck_min = fck_min ? fck_min : 1;
642
643 fckd_start = min(prate * m / fck_min, fckd_hw_max);
644 fckd_stop = max(DIV_ROUND_UP(prate * m, fck_hw_max), 1ul);
645
646 for (fckd = fckd_start; fckd >= fckd_stop; --fckd) {
647 fck = DIV_ROUND_UP(prate, fckd) * m;
648
649 if (func(fck, data))
650 return true;
651 }
652
653 return false;
654}
655
656int dss_set_fck_rate(struct dss_device *dss, unsigned long rate)
657{
658 int r;
659
660 DSSDBG("set fck to %lu\n", rate);
661
662 r = clk_set_rate(dss->dss_clk, rate);
663 if (r)
664 return r;
665
666 dss->dss_clk_rate = clk_get_rate(dss->dss_clk);
667
668 WARN_ONCE(dss->dss_clk_rate != rate, "clk rate mismatch: %lu != %lu",
669 dss->dss_clk_rate, rate);
670
671 return 0;
672}
673
674unsigned long dss_get_dispc_clk_rate(struct dss_device *dss)
675{
676 return dss->dss_clk_rate;
677}
678
679unsigned long dss_get_max_fck_rate(struct dss_device *dss)
680{
681 return dss->feat->fck_freq_max;
682}
683
684enum omap_dss_output_id dss_get_supported_outputs(struct dss_device *dss,
685 enum omap_channel channel)
686{
687 return dss->feat->outputs[channel];
688}
689
690static int dss_setup_default_clock(struct dss_device *dss)
691{
692 unsigned long max_dss_fck, prate;
693 unsigned long fck;
694 unsigned int fck_div;
695 int r;
696
697 max_dss_fck = dss->feat->fck_freq_max;
698
699 if (dss->parent_clk == NULL) {
700 fck = clk_round_rate(dss->dss_clk, max_dss_fck);
701 } else {
702 prate = clk_get_rate(dss->parent_clk);
703
704 fck_div = DIV_ROUND_UP(prate * dss->feat->dss_fck_multiplier,
705 max_dss_fck);
706 fck = DIV_ROUND_UP(prate, fck_div)
707 * dss->feat->dss_fck_multiplier;
708 }
709
710 r = dss_set_fck_rate(dss, fck);
711 if (r)
712 return r;
713
714 return 0;
715}
716
717void dss_set_venc_output(struct dss_device *dss, enum omap_dss_venc_type type)
718{
719 int l = 0;
720
721 if (type == OMAP_DSS_VENC_TYPE_COMPOSITE)
722 l = 0;
723 else if (type == OMAP_DSS_VENC_TYPE_SVIDEO)
724 l = 1;
725 else
726 BUG();
727
728 /* venc out selection. 0 = comp, 1 = svideo */
729 REG_FLD_MOD(dss, DSS_CONTROL, l, 6, 6);
730}
731
732void dss_set_dac_pwrdn_bgz(struct dss_device *dss, bool enable)
733{
734 /* DAC Power-Down Control */
735 REG_FLD_MOD(dss, DSS_CONTROL, enable, 5, 5);
736}
737
738void dss_select_hdmi_venc_clk_source(struct dss_device *dss,
739 enum dss_hdmi_venc_clk_source_select src)
740{
741 enum omap_dss_output_id outputs;
742
743 outputs = dss->feat->outputs[OMAP_DSS_CHANNEL_DIGIT];
744
745 /* Complain about invalid selections */
746 WARN_ON((src == DSS_VENC_TV_CLK) && !(outputs & OMAP_DSS_OUTPUT_VENC));
747 WARN_ON((src == DSS_HDMI_M_PCLK) && !(outputs & OMAP_DSS_OUTPUT_HDMI));
748
749 /* Select only if we have options */
750 if ((outputs & OMAP_DSS_OUTPUT_VENC) &&
751 (outputs & OMAP_DSS_OUTPUT_HDMI))
752 /* VENC_HDMI_SWITCH */
753 REG_FLD_MOD(dss, DSS_CONTROL, src, 15, 15);
754}
755
756static int dss_dpi_select_source_omap2_omap3(struct dss_device *dss, int port,
757 enum omap_channel channel)
758{
759 if (channel != OMAP_DSS_CHANNEL_LCD)
760 return -EINVAL;
761
762 return 0;
763}
764
765static int dss_dpi_select_source_omap4(struct dss_device *dss, int port,
766 enum omap_channel channel)
767{
768 int val;
769
770 switch (channel) {
771 case OMAP_DSS_CHANNEL_LCD2:
772 val = 0;
773 break;
774 case OMAP_DSS_CHANNEL_DIGIT:
775 val = 1;
776 break;
777 default:
778 return -EINVAL;
779 }
780
781 REG_FLD_MOD(dss, DSS_CONTROL, val, 17, 17);
782
783 return 0;
784}
785
786static int dss_dpi_select_source_omap5(struct dss_device *dss, int port,
787 enum omap_channel channel)
788{
789 int val;
790
791 switch (channel) {
792 case OMAP_DSS_CHANNEL_LCD:
793 val = 1;
794 break;
795 case OMAP_DSS_CHANNEL_LCD2:
796 val = 2;
797 break;
798 case OMAP_DSS_CHANNEL_LCD3:
799 val = 3;
800 break;
801 case OMAP_DSS_CHANNEL_DIGIT:
802 val = 0;
803 break;
804 default:
805 return -EINVAL;
806 }
807
808 REG_FLD_MOD(dss, DSS_CONTROL, val, 17, 16);
809
810 return 0;
811}
812
813static int dss_dpi_select_source_dra7xx(struct dss_device *dss, int port,
814 enum omap_channel channel)
815{
816 switch (port) {
817 case 0:
818 return dss_dpi_select_source_omap5(dss, port, channel);
819 case 1:
820 if (channel != OMAP_DSS_CHANNEL_LCD2)
821 return -EINVAL;
822 break;
823 case 2:
824 if (channel != OMAP_DSS_CHANNEL_LCD3)
825 return -EINVAL;
826 break;
827 default:
828 return -EINVAL;
829 }
830
831 return 0;
832}
833
834int dss_dpi_select_source(struct dss_device *dss, int port,
835 enum omap_channel channel)
836{
837 return dss->feat->ops->dpi_select_source(dss, port, channel);
838}
839
840static int dss_get_clocks(struct dss_device *dss)
841{
842 struct clk *clk;
843
844 clk = devm_clk_get(&dss->pdev->dev, "fck");
845 if (IS_ERR(clk)) {
846 DSSERR("can't get clock fck\n");
847 return PTR_ERR(clk);
848 }
849
850 dss->dss_clk = clk;
851
852 if (dss->feat->parent_clk_name) {
853 clk = clk_get(NULL, dss->feat->parent_clk_name);
854 if (IS_ERR(clk)) {
855 DSSERR("Failed to get %s\n",
856 dss->feat->parent_clk_name);
857 return PTR_ERR(clk);
858 }
859 } else {
860 clk = NULL;
861 }
862
863 dss->parent_clk = clk;
864
865 return 0;
866}
867
868static void dss_put_clocks(struct dss_device *dss)
869{
870 if (dss->parent_clk)
871 clk_put(dss->parent_clk);
872}
873
874int dss_runtime_get(struct dss_device *dss)
875{
876 int r;
877
878 DSSDBG("dss_runtime_get\n");
879
880 r = pm_runtime_get_sync(&dss->pdev->dev);
881 WARN_ON(r < 0);
882 return r < 0 ? r : 0;
883}
884
885void dss_runtime_put(struct dss_device *dss)
886{
887 int r;
888
889 DSSDBG("dss_runtime_put\n");
890
891 r = pm_runtime_put_sync(&dss->pdev->dev);
892 WARN_ON(r < 0 && r != -ENOSYS && r != -EBUSY);
893}
894
895struct dss_device *dss_get_device(struct device *dev)
896{
897 return dev_get_drvdata(dev);
898}
899
900/* DEBUGFS */
901#if defined(CONFIG_OMAP2_DSS_DEBUGFS)
902static int dss_initialize_debugfs(struct dss_device *dss)
903{
904 struct dentry *dir;
905
906 dir = debugfs_create_dir("omapdss", NULL);
907 if (IS_ERR(dir))
908 return PTR_ERR(dir);
909
910 dss->debugfs.root = dir;
911
912 return 0;
913}
914
915static void dss_uninitialize_debugfs(struct dss_device *dss)
916{
917 debugfs_remove_recursive(dss->debugfs.root);
918}
919
920struct dss_debugfs_entry {
921 struct dentry *dentry;
922 int (*show_fn)(struct seq_file *s, void *data);
923 void *data;
924};
925
926static int dss_debug_open(struct inode *inode, struct file *file)
927{
928 struct dss_debugfs_entry *entry = inode->i_private;
929
930 return single_open(file, entry->show_fn, entry->data);
931}
932
933static const struct file_operations dss_debug_fops = {
934 .open = dss_debug_open,
935 .read = seq_read,
936 .llseek = seq_lseek,
937 .release = single_release,
938};
939
940struct dss_debugfs_entry *
941dss_debugfs_create_file(struct dss_device *dss, const char *name,
942 int (*show_fn)(struct seq_file *s, void *data),
943 void *data)
944{
945 struct dss_debugfs_entry *entry;
946 struct dentry *d;
947
948 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
949 if (!entry)
950 return ERR_PTR(-ENOMEM);
951
952 entry->show_fn = show_fn;
953 entry->data = data;
954
955 d = debugfs_create_file(name, 0444, dss->debugfs.root, entry,
956 &dss_debug_fops);
957 if (IS_ERR(d)) {
958 kfree(entry);
959 return ERR_PTR(PTR_ERR(d));
960 }
961
962 entry->dentry = d;
963 return entry;
964}
965
966void dss_debugfs_remove_file(struct dss_debugfs_entry *entry)
967{
968 if (IS_ERR_OR_NULL(entry))
969 return;
970
971 debugfs_remove(entry->dentry);
972 kfree(entry);
973}
974
975#else /* CONFIG_OMAP2_DSS_DEBUGFS */
976static inline int dss_initialize_debugfs(struct dss_device *dss)
977{
978 return 0;
979}
980static inline void dss_uninitialize_debugfs(struct dss_device *dss)
981{
982}
983#endif /* CONFIG_OMAP2_DSS_DEBUGFS */
984
985static const struct dss_ops dss_ops_omap2_omap3 = {
986 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
987};
988
989static const struct dss_ops dss_ops_omap4 = {
990 .dpi_select_source = &dss_dpi_select_source_omap4,
991 .select_lcd_source = &dss_lcd_clk_mux_omap4,
992};
993
994static const struct dss_ops dss_ops_omap5 = {
995 .dpi_select_source = &dss_dpi_select_source_omap5,
996 .select_lcd_source = &dss_lcd_clk_mux_omap5,
997};
998
999static const struct dss_ops dss_ops_dra7 = {
1000 .dpi_select_source = &dss_dpi_select_source_dra7xx,
1001 .select_lcd_source = &dss_lcd_clk_mux_dra7,
1002};
1003
1004static const enum omap_display_type omap2plus_ports[] = {
1005 OMAP_DISPLAY_TYPE_DPI,
1006};
1007
1008static const enum omap_display_type omap34xx_ports[] = {
1009 OMAP_DISPLAY_TYPE_DPI,
1010 OMAP_DISPLAY_TYPE_SDI,
1011};
1012
1013static const enum omap_display_type dra7xx_ports[] = {
1014 OMAP_DISPLAY_TYPE_DPI,
1015 OMAP_DISPLAY_TYPE_DPI,
1016 OMAP_DISPLAY_TYPE_DPI,
1017};
1018
1019static const enum omap_dss_output_id omap2_dss_supported_outputs[] = {
1020 /* OMAP_DSS_CHANNEL_LCD */
1021 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI,
1022
1023 /* OMAP_DSS_CHANNEL_DIGIT */
1024 OMAP_DSS_OUTPUT_VENC,
1025};
1026
1027static const enum omap_dss_output_id omap3430_dss_supported_outputs[] = {
1028 /* OMAP_DSS_CHANNEL_LCD */
1029 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1030 OMAP_DSS_OUTPUT_SDI | OMAP_DSS_OUTPUT_DSI1,
1031
1032 /* OMAP_DSS_CHANNEL_DIGIT */
1033 OMAP_DSS_OUTPUT_VENC,
1034};
1035
1036static const enum omap_dss_output_id omap3630_dss_supported_outputs[] = {
1037 /* OMAP_DSS_CHANNEL_LCD */
1038 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1039 OMAP_DSS_OUTPUT_DSI1,
1040
1041 /* OMAP_DSS_CHANNEL_DIGIT */
1042 OMAP_DSS_OUTPUT_VENC,
1043};
1044
1045static const enum omap_dss_output_id am43xx_dss_supported_outputs[] = {
1046 /* OMAP_DSS_CHANNEL_LCD */
1047 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI,
1048};
1049
1050static const enum omap_dss_output_id omap4_dss_supported_outputs[] = {
1051 /* OMAP_DSS_CHANNEL_LCD */
1052 OMAP_DSS_OUTPUT_DBI | OMAP_DSS_OUTPUT_DSI1,
1053
1054 /* OMAP_DSS_CHANNEL_DIGIT */
1055 OMAP_DSS_OUTPUT_VENC | OMAP_DSS_OUTPUT_HDMI,
1056
1057 /* OMAP_DSS_CHANNEL_LCD2 */
1058 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1059 OMAP_DSS_OUTPUT_DSI2,
1060};
1061
1062static const enum omap_dss_output_id omap5_dss_supported_outputs[] = {
1063 /* OMAP_DSS_CHANNEL_LCD */
1064 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1065 OMAP_DSS_OUTPUT_DSI1 | OMAP_DSS_OUTPUT_DSI2,
1066
1067 /* OMAP_DSS_CHANNEL_DIGIT */
1068 OMAP_DSS_OUTPUT_HDMI,
1069
1070 /* OMAP_DSS_CHANNEL_LCD2 */
1071 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1072 OMAP_DSS_OUTPUT_DSI1,
1073
1074 /* OMAP_DSS_CHANNEL_LCD3 */
1075 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1076 OMAP_DSS_OUTPUT_DSI2,
1077};
1078
1079static const struct dss_features omap24xx_dss_feats = {
1080 .model = DSS_MODEL_OMAP2,
1081 /*
1082 * fck div max is really 16, but the divider range has gaps. The range
1083 * from 1 to 6 has no gaps, so let's use that as a max.
1084 */
1085 .fck_div_max = 6,
1086 .fck_freq_max = 133000000,
1087 .dss_fck_multiplier = 2,
1088 .parent_clk_name = "core_ck",
1089 .ports = omap2plus_ports,
1090 .num_ports = ARRAY_SIZE(omap2plus_ports),
1091 .outputs = omap2_dss_supported_outputs,
1092 .ops = &dss_ops_omap2_omap3,
1093 .dispc_clk_switch = { 0, 0 },
1094 .has_lcd_clk_src = false,
1095};
1096
1097static const struct dss_features omap34xx_dss_feats = {
1098 .model = DSS_MODEL_OMAP3,
1099 .fck_div_max = 16,
1100 .fck_freq_max = 173000000,
1101 .dss_fck_multiplier = 2,
1102 .parent_clk_name = "dpll4_ck",
1103 .ports = omap34xx_ports,
1104 .outputs = omap3430_dss_supported_outputs,
1105 .num_ports = ARRAY_SIZE(omap34xx_ports),
1106 .ops = &dss_ops_omap2_omap3,
1107 .dispc_clk_switch = { 0, 0 },
1108 .has_lcd_clk_src = false,
1109};
1110
1111static const struct dss_features omap3630_dss_feats = {
1112 .model = DSS_MODEL_OMAP3,
1113 .fck_div_max = 32,
1114 .fck_freq_max = 173000000,
1115 .dss_fck_multiplier = 1,
1116 .parent_clk_name = "dpll4_ck",
1117 .ports = omap2plus_ports,
1118 .num_ports = ARRAY_SIZE(omap2plus_ports),
1119 .outputs = omap3630_dss_supported_outputs,
1120 .ops = &dss_ops_omap2_omap3,
1121 .dispc_clk_switch = { 0, 0 },
1122 .has_lcd_clk_src = false,
1123};
1124
1125static const struct dss_features omap44xx_dss_feats = {
1126 .model = DSS_MODEL_OMAP4,
1127 .fck_div_max = 32,
1128 .fck_freq_max = 186000000,
1129 .dss_fck_multiplier = 1,
1130 .parent_clk_name = "dpll_per_x2_ck",
1131 .ports = omap2plus_ports,
1132 .num_ports = ARRAY_SIZE(omap2plus_ports),
1133 .outputs = omap4_dss_supported_outputs,
1134 .ops = &dss_ops_omap4,
1135 .dispc_clk_switch = { 9, 8 },
1136 .has_lcd_clk_src = true,
1137};
1138
1139static const struct dss_features omap54xx_dss_feats = {
1140 .model = DSS_MODEL_OMAP5,
1141 .fck_div_max = 64,
1142 .fck_freq_max = 209250000,
1143 .dss_fck_multiplier = 1,
1144 .parent_clk_name = "dpll_per_x2_ck",
1145 .ports = omap2plus_ports,
1146 .num_ports = ARRAY_SIZE(omap2plus_ports),
1147 .outputs = omap5_dss_supported_outputs,
1148 .ops = &dss_ops_omap5,
1149 .dispc_clk_switch = { 9, 7 },
1150 .has_lcd_clk_src = true,
1151};
1152
1153static const struct dss_features am43xx_dss_feats = {
1154 .model = DSS_MODEL_OMAP3,
1155 .fck_div_max = 0,
1156 .fck_freq_max = 200000000,
1157 .dss_fck_multiplier = 0,
1158 .parent_clk_name = NULL,
1159 .ports = omap2plus_ports,
1160 .num_ports = ARRAY_SIZE(omap2plus_ports),
1161 .outputs = am43xx_dss_supported_outputs,
1162 .ops = &dss_ops_omap2_omap3,
1163 .dispc_clk_switch = { 0, 0 },
1164 .has_lcd_clk_src = true,
1165};
1166
1167static const struct dss_features dra7xx_dss_feats = {
1168 .model = DSS_MODEL_DRA7,
1169 .fck_div_max = 64,
1170 .fck_freq_max = 209250000,
1171 .dss_fck_multiplier = 1,
1172 .parent_clk_name = "dpll_per_x2_ck",
1173 .ports = dra7xx_ports,
1174 .num_ports = ARRAY_SIZE(dra7xx_ports),
1175 .outputs = omap5_dss_supported_outputs,
1176 .ops = &dss_ops_dra7,
1177 .dispc_clk_switch = { 9, 7 },
1178 .has_lcd_clk_src = true,
1179};
1180
1181static int dss_init_ports(struct dss_device *dss)
1182{
1183 struct platform_device *pdev = dss->pdev;
1184 struct device_node *parent = pdev->dev.of_node;
1185 struct device_node *port;
1186 int i;
1187
1188 for (i = 0; i < dss->feat->num_ports; i++) {
1189 port = of_graph_get_port_by_id(parent, i);
1190 if (!port)
1191 continue;
1192
1193 switch (dss->feat->ports[i]) {
1194 case OMAP_DISPLAY_TYPE_DPI:
1195 dpi_init_port(dss, pdev, port, dss->feat->model);
1196 break;
1197 case OMAP_DISPLAY_TYPE_SDI:
1198 sdi_init_port(dss, pdev, port);
1199 break;
1200 default:
1201 break;
1202 }
1203 }
1204
1205 return 0;
1206}
1207
1208static void dss_uninit_ports(struct dss_device *dss)
1209{
1210 struct platform_device *pdev = dss->pdev;
1211 struct device_node *parent = pdev->dev.of_node;
1212 struct device_node *port;
1213 int i;
1214
1215 for (i = 0; i < dss->feat->num_ports; i++) {
1216 port = of_graph_get_port_by_id(parent, i);
1217 if (!port)
1218 continue;
1219
1220 switch (dss->feat->ports[i]) {
1221 case OMAP_DISPLAY_TYPE_DPI:
1222 dpi_uninit_port(port);
1223 break;
1224 case OMAP_DISPLAY_TYPE_SDI:
1225 sdi_uninit_port(port);
1226 break;
1227 default:
1228 break;
1229 }
1230 }
1231}
1232
1233static int dss_video_pll_probe(struct dss_device *dss)
1234{
1235 struct platform_device *pdev = dss->pdev;
1236 struct device_node *np = pdev->dev.of_node;
1237 struct regulator *pll_regulator;
1238 int r;
1239
1240 if (!np)
1241 return 0;
1242
1243 if (of_property_read_bool(np, "syscon-pll-ctrl")) {
1244 dss->syscon_pll_ctrl = syscon_regmap_lookup_by_phandle(np,
1245 "syscon-pll-ctrl");
1246 if (IS_ERR(dss->syscon_pll_ctrl)) {
1247 dev_err(&pdev->dev,
1248 "failed to get syscon-pll-ctrl regmap\n");
1249 return PTR_ERR(dss->syscon_pll_ctrl);
1250 }
1251
1252 if (of_property_read_u32_index(np, "syscon-pll-ctrl", 1,
1253 &dss->syscon_pll_ctrl_offset)) {
1254 dev_err(&pdev->dev,
1255 "failed to get syscon-pll-ctrl offset\n");
1256 return -EINVAL;
1257 }
1258 }
1259
1260 pll_regulator = devm_regulator_get(&pdev->dev, "vdda_video");
1261 if (IS_ERR(pll_regulator)) {
1262 r = PTR_ERR(pll_regulator);
1263
1264 switch (r) {
1265 case -ENOENT:
1266 pll_regulator = NULL;
1267 break;
1268
1269 case -EPROBE_DEFER:
1270 return -EPROBE_DEFER;
1271
1272 default:
1273 DSSERR("can't get DPLL VDDA regulator\n");
1274 return r;
1275 }
1276 }
1277
1278 if (of_property_match_string(np, "reg-names", "pll1") >= 0) {
1279 dss->video1_pll = dss_video_pll_init(dss, pdev, 0,
1280 pll_regulator);
1281 if (IS_ERR(dss->video1_pll))
1282 return PTR_ERR(dss->video1_pll);
1283 }
1284
1285 if (of_property_match_string(np, "reg-names", "pll2") >= 0) {
1286 dss->video2_pll = dss_video_pll_init(dss, pdev, 1,
1287 pll_regulator);
1288 if (IS_ERR(dss->video2_pll)) {
1289 dss_video_pll_uninit(dss->video1_pll);
1290 return PTR_ERR(dss->video2_pll);
1291 }
1292 }
1293
1294 return 0;
1295}
1296
1297/* DSS HW IP initialisation */
1298static const struct of_device_id dss_of_match[] = {
1299 { .compatible = "ti,omap2-dss", .data = &omap24xx_dss_feats },
1300 { .compatible = "ti,omap3-dss", .data = &omap3630_dss_feats },
1301 { .compatible = "ti,omap4-dss", .data = &omap44xx_dss_feats },
1302 { .compatible = "ti,omap5-dss", .data = &omap54xx_dss_feats },
1303 { .compatible = "ti,dra7-dss", .data = &dra7xx_dss_feats },
1304 {},
1305};
1306MODULE_DEVICE_TABLE(of, dss_of_match);
1307
1308static const struct soc_device_attribute dss_soc_devices[] = {
1309 { .machine = "OMAP3430/3530", .data = &omap34xx_dss_feats },
1310 { .machine = "AM35??", .data = &omap34xx_dss_feats },
1311 { .family = "AM43xx", .data = &am43xx_dss_feats },
1312 { /* sentinel */ }
1313};
1314
1315static int dss_bind(struct device *dev)
1316{
1317 struct dss_device *dss = dev_get_drvdata(dev);
1318 int r;
1319
1320 r = component_bind_all(dev, NULL);
1321 if (r)
1322 return r;
1323
1324 pm_set_vt_switch(0);
1325
1326 omapdss_gather_components(dev);
1327 omapdss_set_dss(dss);
1328
1329 return 0;
1330}
1331
1332static void dss_unbind(struct device *dev)
1333{
1334 omapdss_set_dss(NULL);
1335
1336 component_unbind_all(dev, NULL);
1337}
1338
1339static const struct component_master_ops dss_component_ops = {
1340 .bind = dss_bind,
1341 .unbind = dss_unbind,
1342};
1343
1344static int dss_component_compare(struct device *dev, void *data)
1345{
1346 struct device *child = data;
1347 return dev == child;
1348}
1349
1350static int dss_add_child_component(struct device *dev, void *data)
1351{
1352 struct component_match **match = data;
1353
1354 /*
1355 * HACK
1356 * We don't have a working driver for rfbi, so skip it here always.
1357 * Otherwise dss will never get probed successfully, as it will wait
1358 * for rfbi to get probed.
1359 */
1360 if (strstr(dev_name(dev), "rfbi"))
1361 return 0;
1362
1363 component_match_add(dev->parent, match, dss_component_compare, dev);
1364
1365 return 0;
1366}
1367
1368static int dss_probe_hardware(struct dss_device *dss)
1369{
1370 u32 rev;
1371 int r;
1372
1373 r = dss_runtime_get(dss);
1374 if (r)
1375 return r;
1376
1377 dss->dss_clk_rate = clk_get_rate(dss->dss_clk);
1378
1379 /* Select DPLL */
1380 REG_FLD_MOD(dss, DSS_CONTROL, 0, 0, 0);
1381
1382 dss_select_dispc_clk_source(dss, DSS_CLK_SRC_FCK);
1383
1384#ifdef CONFIG_OMAP2_DSS_VENC
1385 REG_FLD_MOD(dss, DSS_CONTROL, 1, 4, 4); /* venc dac demen */
1386 REG_FLD_MOD(dss, DSS_CONTROL, 1, 3, 3); /* venc clock 4x enable */
1387 REG_FLD_MOD(dss, DSS_CONTROL, 0, 2, 2); /* venc clock mode = normal */
1388#endif
1389 dss->dsi_clk_source[0] = DSS_CLK_SRC_FCK;
1390 dss->dsi_clk_source[1] = DSS_CLK_SRC_FCK;
1391 dss->dispc_clk_source = DSS_CLK_SRC_FCK;
1392 dss->lcd_clk_source[0] = DSS_CLK_SRC_FCK;
1393 dss->lcd_clk_source[1] = DSS_CLK_SRC_FCK;
1394
1395 rev = dss_read_reg(dss, DSS_REVISION);
1396 pr_info("OMAP DSS rev %d.%d\n", FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
1397
1398 dss_runtime_put(dss);
1399
1400 return 0;
1401}
1402
1403static int dss_probe(struct platform_device *pdev)
1404{
1405 const struct soc_device_attribute *soc;
1406 struct component_match *match = NULL;
1407 struct resource *dss_mem;
1408 struct dss_device *dss;
1409 int r;
1410
1411 dss = kzalloc(sizeof(*dss), GFP_KERNEL);
1412 if (!dss)
1413 return -ENOMEM;
1414
1415 dss->pdev = pdev;
1416 platform_set_drvdata(pdev, dss);
1417
1418 r = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1419 if (r) {
1420 dev_err(&pdev->dev, "Failed to set the DMA mask\n");
1421 goto err_free_dss;
1422 }
1423
1424 /*
1425 * The various OMAP3-based SoCs can't be told apart using the compatible
1426 * string, use SoC device matching.
1427 */
1428 soc = soc_device_match(dss_soc_devices);
1429 if (soc)
1430 dss->feat = soc->data;
1431 else
1432 dss->feat = of_match_device(dss_of_match, &pdev->dev)->data;
1433
1434 /* Map I/O registers, get and setup clocks. */
1435 dss_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1436 dss->base = devm_ioremap_resource(&pdev->dev, dss_mem);
1437 if (IS_ERR(dss->base)) {
1438 r = PTR_ERR(dss->base);
1439 goto err_free_dss;
1440 }
1441
1442 r = dss_get_clocks(dss);
1443 if (r)
1444 goto err_free_dss;
1445
1446 r = dss_setup_default_clock(dss);
1447 if (r)
1448 goto err_put_clocks;
1449
1450 /* Setup the video PLLs and the DPI and SDI ports. */
1451 r = dss_video_pll_probe(dss);
1452 if (r)
1453 goto err_put_clocks;
1454
1455 r = dss_init_ports(dss);
1456 if (r)
1457 goto err_uninit_plls;
1458
1459 /* Enable runtime PM and probe the hardware. */
1460 pm_runtime_enable(&pdev->dev);
1461
1462 r = dss_probe_hardware(dss);
1463 if (r)
1464 goto err_pm_runtime_disable;
1465
1466 /* Initialize debugfs. */
1467 r = dss_initialize_debugfs(dss);
1468 if (r)
1469 goto err_pm_runtime_disable;
1470
1471 dss->debugfs.clk = dss_debugfs_create_file(dss, "clk",
1472 dss_debug_dump_clocks, dss);
1473 dss->debugfs.dss = dss_debugfs_create_file(dss, "dss", dss_dump_regs,
1474 dss);
1475
1476 /* Add all the child devices as components. */
1477 device_for_each_child(&pdev->dev, &match, dss_add_child_component);
1478
1479 r = component_master_add_with_match(&pdev->dev, &dss_component_ops, match);
1480 if (r)
1481 goto err_uninit_debugfs;
1482
1483 return 0;
1484
1485err_uninit_debugfs:
1486 dss_debugfs_remove_file(dss->debugfs.clk);
1487 dss_debugfs_remove_file(dss->debugfs.dss);
1488 dss_uninitialize_debugfs(dss);
1489
1490err_pm_runtime_disable:
1491 pm_runtime_disable(&pdev->dev);
1492 dss_uninit_ports(dss);
1493
1494err_uninit_plls:
1495 if (dss->video1_pll)
1496 dss_video_pll_uninit(dss->video1_pll);
1497 if (dss->video2_pll)
1498 dss_video_pll_uninit(dss->video2_pll);
1499
1500err_put_clocks:
1501 dss_put_clocks(dss);
1502
1503err_free_dss:
1504 kfree(dss);
1505
1506 return r;
1507}
1508
1509static int dss_remove(struct platform_device *pdev)
1510{
1511 struct dss_device *dss = platform_get_drvdata(pdev);
1512
1513 component_master_del(&pdev->dev, &dss_component_ops);
1514
1515 dss_debugfs_remove_file(dss->debugfs.clk);
1516 dss_debugfs_remove_file(dss->debugfs.dss);
1517 dss_uninitialize_debugfs(dss);
1518
1519 pm_runtime_disable(&pdev->dev);
1520
1521 dss_uninit_ports(dss);
1522
1523 if (dss->video1_pll)
1524 dss_video_pll_uninit(dss->video1_pll);
1525
1526 if (dss->video2_pll)
1527 dss_video_pll_uninit(dss->video2_pll);
1528
1529 dss_put_clocks(dss);
1530
1531 kfree(dss);
1532
1533 return 0;
1534}
1535
1536static void dss_shutdown(struct platform_device *pdev)
1537{
1538 struct omap_dss_device *dssdev = NULL;
1539
1540 DSSDBG("shutdown\n");
1541
1542 for_each_dss_dev(dssdev) {
1543 if (!dssdev->driver)
1544 continue;
1545
1546 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
1547 dssdev->driver->disable(dssdev);
1548 }
1549}
1550
1551static 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
1563static 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
1585static const struct dev_pm_ops dss_pm_ops = {
1586 .runtime_suspend = dss_runtime_suspend,
1587 .runtime_resume = dss_runtime_resume,
1588};
1589
1590struct 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};
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 "omapdss.h"
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 int (*select_lcd_source)(enum omap_channel channel,
79 enum dss_clk_source clk_src);
80};
81
82static struct {
83 struct platform_device *pdev;
84 void __iomem *base;
85 struct regmap *syscon_pll_ctrl;
86 u32 syscon_pll_ctrl_offset;
87
88 struct clk *parent_clk;
89 struct clk *dss_clk;
90 unsigned long dss_clk_rate;
91
92 unsigned long cache_req_pck;
93 unsigned long cache_prate;
94 struct dispc_clock_info cache_dispc_cinfo;
95
96 enum dss_clk_source dsi_clk_source[MAX_NUM_DSI];
97 enum dss_clk_source dispc_clk_source;
98 enum dss_clk_source lcd_clk_source[MAX_DSS_LCD_MANAGERS];
99
100 bool ctx_valid;
101 u32 ctx[DSS_SZ_REGS / sizeof(u32)];
102
103 const struct dss_features *feat;
104
105 struct dss_pll *video1_pll;
106 struct dss_pll *video2_pll;
107} dss;
108
109static const char * const dss_generic_clk_source_names[] = {
110 [DSS_CLK_SRC_FCK] = "FCK",
111 [DSS_CLK_SRC_PLL1_1] = "PLL1:1",
112 [DSS_CLK_SRC_PLL1_2] = "PLL1:2",
113 [DSS_CLK_SRC_PLL1_3] = "PLL1:3",
114 [DSS_CLK_SRC_PLL2_1] = "PLL2:1",
115 [DSS_CLK_SRC_PLL2_2] = "PLL2:2",
116 [DSS_CLK_SRC_PLL2_3] = "PLL2:3",
117 [DSS_CLK_SRC_HDMI_PLL] = "HDMI PLL",
118};
119
120static bool dss_initialized;
121
122bool omapdss_is_initialized(void)
123{
124 return dss_initialized;
125}
126EXPORT_SYMBOL(omapdss_is_initialized);
127
128static inline void dss_write_reg(const struct dss_reg idx, u32 val)
129{
130 __raw_writel(val, dss.base + idx.idx);
131}
132
133static inline u32 dss_read_reg(const struct dss_reg idx)
134{
135 return __raw_readl(dss.base + idx.idx);
136}
137
138#define SR(reg) \
139 dss.ctx[(DSS_##reg).idx / sizeof(u32)] = dss_read_reg(DSS_##reg)
140#define RR(reg) \
141 dss_write_reg(DSS_##reg, dss.ctx[(DSS_##reg).idx / sizeof(u32)])
142
143static void dss_save_context(void)
144{
145 DSSDBG("dss_save_context\n");
146
147 SR(CONTROL);
148
149 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
150 OMAP_DISPLAY_TYPE_SDI) {
151 SR(SDI_CONTROL);
152 SR(PLL_CONTROL);
153 }
154
155 dss.ctx_valid = true;
156
157 DSSDBG("context saved\n");
158}
159
160static void dss_restore_context(void)
161{
162 DSSDBG("dss_restore_context\n");
163
164 if (!dss.ctx_valid)
165 return;
166
167 RR(CONTROL);
168
169 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
170 OMAP_DISPLAY_TYPE_SDI) {
171 RR(SDI_CONTROL);
172 RR(PLL_CONTROL);
173 }
174
175 DSSDBG("context restored\n");
176}
177
178#undef SR
179#undef RR
180
181void dss_ctrl_pll_enable(enum dss_pll_id pll_id, bool enable)
182{
183 unsigned shift;
184 unsigned val;
185
186 if (!dss.syscon_pll_ctrl)
187 return;
188
189 val = !enable;
190
191 switch (pll_id) {
192 case DSS_PLL_VIDEO1:
193 shift = 0;
194 break;
195 case DSS_PLL_VIDEO2:
196 shift = 1;
197 break;
198 case DSS_PLL_HDMI:
199 shift = 2;
200 break;
201 default:
202 DSSERR("illegal DSS PLL ID %d\n", pll_id);
203 return;
204 }
205
206 regmap_update_bits(dss.syscon_pll_ctrl, dss.syscon_pll_ctrl_offset,
207 1 << shift, val << shift);
208}
209
210static int dss_ctrl_pll_set_control_mux(enum dss_clk_source clk_src,
211 enum omap_channel channel)
212{
213 unsigned shift, val;
214
215 if (!dss.syscon_pll_ctrl)
216 return -EINVAL;
217
218 switch (channel) {
219 case OMAP_DSS_CHANNEL_LCD:
220 shift = 3;
221
222 switch (clk_src) {
223 case DSS_CLK_SRC_PLL1_1:
224 val = 0; break;
225 case DSS_CLK_SRC_HDMI_PLL:
226 val = 1; break;
227 default:
228 DSSERR("error in PLL mux config for LCD\n");
229 return -EINVAL;
230 }
231
232 break;
233 case OMAP_DSS_CHANNEL_LCD2:
234 shift = 5;
235
236 switch (clk_src) {
237 case DSS_CLK_SRC_PLL1_3:
238 val = 0; break;
239 case DSS_CLK_SRC_PLL2_3:
240 val = 1; break;
241 case DSS_CLK_SRC_HDMI_PLL:
242 val = 2; break;
243 default:
244 DSSERR("error in PLL mux config for LCD2\n");
245 return -EINVAL;
246 }
247
248 break;
249 case OMAP_DSS_CHANNEL_LCD3:
250 shift = 7;
251
252 switch (clk_src) {
253 case DSS_CLK_SRC_PLL2_1:
254 val = 0; break;
255 case DSS_CLK_SRC_PLL1_3:
256 val = 1; break;
257 case DSS_CLK_SRC_HDMI_PLL:
258 val = 2; break;
259 default:
260 DSSERR("error in PLL mux config for LCD3\n");
261 return -EINVAL;
262 }
263
264 break;
265 default:
266 DSSERR("error in PLL mux config\n");
267 return -EINVAL;
268 }
269
270 regmap_update_bits(dss.syscon_pll_ctrl, dss.syscon_pll_ctrl_offset,
271 0x3 << shift, val << shift);
272
273 return 0;
274}
275
276void dss_sdi_init(int datapairs)
277{
278 u32 l;
279
280 BUG_ON(datapairs > 3 || datapairs < 1);
281
282 l = dss_read_reg(DSS_SDI_CONTROL);
283 l = FLD_MOD(l, 0xf, 19, 15); /* SDI_PDIV */
284 l = FLD_MOD(l, datapairs-1, 3, 2); /* SDI_PRSEL */
285 l = FLD_MOD(l, 2, 1, 0); /* SDI_BWSEL */
286 dss_write_reg(DSS_SDI_CONTROL, l);
287
288 l = dss_read_reg(DSS_PLL_CONTROL);
289 l = FLD_MOD(l, 0x7, 25, 22); /* SDI_PLL_FREQSEL */
290 l = FLD_MOD(l, 0xb, 16, 11); /* SDI_PLL_REGN */
291 l = FLD_MOD(l, 0xb4, 10, 1); /* SDI_PLL_REGM */
292 dss_write_reg(DSS_PLL_CONTROL, l);
293}
294
295int dss_sdi_enable(void)
296{
297 unsigned long timeout;
298
299 dispc_pck_free_enable(1);
300
301 /* Reset SDI PLL */
302 REG_FLD_MOD(DSS_PLL_CONTROL, 1, 18, 18); /* SDI_PLL_SYSRESET */
303 udelay(1); /* wait 2x PCLK */
304
305 /* Lock SDI PLL */
306 REG_FLD_MOD(DSS_PLL_CONTROL, 1, 28, 28); /* SDI_PLL_GOBIT */
307
308 /* Waiting for PLL lock request to complete */
309 timeout = jiffies + msecs_to_jiffies(500);
310 while (dss_read_reg(DSS_SDI_STATUS) & (1 << 6)) {
311 if (time_after_eq(jiffies, timeout)) {
312 DSSERR("PLL lock request timed out\n");
313 goto err1;
314 }
315 }
316
317 /* Clearing PLL_GO bit */
318 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 28, 28);
319
320 /* Waiting for PLL to lock */
321 timeout = jiffies + msecs_to_jiffies(500);
322 while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 5))) {
323 if (time_after_eq(jiffies, timeout)) {
324 DSSERR("PLL lock timed out\n");
325 goto err1;
326 }
327 }
328
329 dispc_lcd_enable_signal(1);
330
331 /* Waiting for SDI reset to complete */
332 timeout = jiffies + msecs_to_jiffies(500);
333 while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 2))) {
334 if (time_after_eq(jiffies, timeout)) {
335 DSSERR("SDI reset timed out\n");
336 goto err2;
337 }
338 }
339
340 return 0;
341
342 err2:
343 dispc_lcd_enable_signal(0);
344 err1:
345 /* Reset SDI PLL */
346 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
347
348 dispc_pck_free_enable(0);
349
350 return -ETIMEDOUT;
351}
352
353void dss_sdi_disable(void)
354{
355 dispc_lcd_enable_signal(0);
356
357 dispc_pck_free_enable(0);
358
359 /* Reset SDI PLL */
360 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
361}
362
363const char *dss_get_clk_source_name(enum dss_clk_source clk_src)
364{
365 return dss_generic_clk_source_names[clk_src];
366}
367
368void dss_dump_clocks(struct seq_file *s)
369{
370 const char *fclk_name;
371 unsigned long fclk_rate;
372
373 if (dss_runtime_get())
374 return;
375
376 seq_printf(s, "- DSS -\n");
377
378 fclk_name = dss_get_clk_source_name(DSS_CLK_SRC_FCK);
379 fclk_rate = clk_get_rate(dss.dss_clk);
380
381 seq_printf(s, "%s = %lu\n",
382 fclk_name,
383 fclk_rate);
384
385 dss_runtime_put();
386}
387
388static void dss_dump_regs(struct seq_file *s)
389{
390#define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(r))
391
392 if (dss_runtime_get())
393 return;
394
395 DUMPREG(DSS_REVISION);
396 DUMPREG(DSS_SYSCONFIG);
397 DUMPREG(DSS_SYSSTATUS);
398 DUMPREG(DSS_CONTROL);
399
400 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
401 OMAP_DISPLAY_TYPE_SDI) {
402 DUMPREG(DSS_SDI_CONTROL);
403 DUMPREG(DSS_PLL_CONTROL);
404 DUMPREG(DSS_SDI_STATUS);
405 }
406
407 dss_runtime_put();
408#undef DUMPREG
409}
410
411static int dss_get_channel_index(enum omap_channel channel)
412{
413 switch (channel) {
414 case OMAP_DSS_CHANNEL_LCD:
415 return 0;
416 case OMAP_DSS_CHANNEL_LCD2:
417 return 1;
418 case OMAP_DSS_CHANNEL_LCD3:
419 return 2;
420 default:
421 WARN_ON(1);
422 return 0;
423 }
424}
425
426static void dss_select_dispc_clk_source(enum dss_clk_source clk_src)
427{
428 int b;
429 u8 start, end;
430
431 /*
432 * We always use PRCM clock as the DISPC func clock, except on DSS3,
433 * where we don't have separate DISPC and LCD clock sources.
434 */
435 if (WARN_ON(dss_has_feature(FEAT_LCD_CLK_SRC) &&
436 clk_src != DSS_CLK_SRC_FCK))
437 return;
438
439 switch (clk_src) {
440 case DSS_CLK_SRC_FCK:
441 b = 0;
442 break;
443 case DSS_CLK_SRC_PLL1_1:
444 b = 1;
445 break;
446 case DSS_CLK_SRC_PLL2_1:
447 b = 2;
448 break;
449 default:
450 BUG();
451 return;
452 }
453
454 dss_feat_get_reg_field(FEAT_REG_DISPC_CLK_SWITCH, &start, &end);
455
456 REG_FLD_MOD(DSS_CONTROL, b, start, end); /* DISPC_CLK_SWITCH */
457
458 dss.dispc_clk_source = clk_src;
459}
460
461void dss_select_dsi_clk_source(int dsi_module,
462 enum dss_clk_source clk_src)
463{
464 int b, pos;
465
466 switch (clk_src) {
467 case DSS_CLK_SRC_FCK:
468 b = 0;
469 break;
470 case DSS_CLK_SRC_PLL1_2:
471 BUG_ON(dsi_module != 0);
472 b = 1;
473 break;
474 case DSS_CLK_SRC_PLL2_2:
475 BUG_ON(dsi_module != 1);
476 b = 1;
477 break;
478 default:
479 BUG();
480 return;
481 }
482
483 pos = dsi_module == 0 ? 1 : 10;
484 REG_FLD_MOD(DSS_CONTROL, b, pos, pos); /* DSIx_CLK_SWITCH */
485
486 dss.dsi_clk_source[dsi_module] = clk_src;
487}
488
489static int dss_lcd_clk_mux_dra7(enum omap_channel channel,
490 enum dss_clk_source clk_src)
491{
492 const u8 ctrl_bits[] = {
493 [OMAP_DSS_CHANNEL_LCD] = 0,
494 [OMAP_DSS_CHANNEL_LCD2] = 12,
495 [OMAP_DSS_CHANNEL_LCD3] = 19,
496 };
497
498 u8 ctrl_bit = ctrl_bits[channel];
499 int r;
500
501 if (clk_src == DSS_CLK_SRC_FCK) {
502 /* LCDx_CLK_SWITCH */
503 REG_FLD_MOD(DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
504 return -EINVAL;
505 }
506
507 r = dss_ctrl_pll_set_control_mux(clk_src, channel);
508 if (r)
509 return r;
510
511 REG_FLD_MOD(DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
512
513 return 0;
514}
515
516static int dss_lcd_clk_mux_omap5(enum omap_channel channel,
517 enum dss_clk_source clk_src)
518{
519 const u8 ctrl_bits[] = {
520 [OMAP_DSS_CHANNEL_LCD] = 0,
521 [OMAP_DSS_CHANNEL_LCD2] = 12,
522 [OMAP_DSS_CHANNEL_LCD3] = 19,
523 };
524 const enum dss_clk_source allowed_plls[] = {
525 [OMAP_DSS_CHANNEL_LCD] = DSS_CLK_SRC_PLL1_1,
526 [OMAP_DSS_CHANNEL_LCD2] = DSS_CLK_SRC_FCK,
527 [OMAP_DSS_CHANNEL_LCD3] = DSS_CLK_SRC_PLL2_1,
528 };
529
530 u8 ctrl_bit = ctrl_bits[channel];
531
532 if (clk_src == DSS_CLK_SRC_FCK) {
533 /* LCDx_CLK_SWITCH */
534 REG_FLD_MOD(DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
535 return -EINVAL;
536 }
537
538 if (WARN_ON(allowed_plls[channel] != clk_src))
539 return -EINVAL;
540
541 REG_FLD_MOD(DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
542
543 return 0;
544}
545
546static int dss_lcd_clk_mux_omap4(enum omap_channel channel,
547 enum dss_clk_source clk_src)
548{
549 const u8 ctrl_bits[] = {
550 [OMAP_DSS_CHANNEL_LCD] = 0,
551 [OMAP_DSS_CHANNEL_LCD2] = 12,
552 };
553 const enum dss_clk_source allowed_plls[] = {
554 [OMAP_DSS_CHANNEL_LCD] = DSS_CLK_SRC_PLL1_1,
555 [OMAP_DSS_CHANNEL_LCD2] = DSS_CLK_SRC_PLL2_1,
556 };
557
558 u8 ctrl_bit = ctrl_bits[channel];
559
560 if (clk_src == DSS_CLK_SRC_FCK) {
561 /* LCDx_CLK_SWITCH */
562 REG_FLD_MOD(DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
563 return 0;
564 }
565
566 if (WARN_ON(allowed_plls[channel] != clk_src))
567 return -EINVAL;
568
569 REG_FLD_MOD(DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
570
571 return 0;
572}
573
574void dss_select_lcd_clk_source(enum omap_channel channel,
575 enum dss_clk_source clk_src)
576{
577 int idx = dss_get_channel_index(channel);
578 int r;
579
580 if (!dss_has_feature(FEAT_LCD_CLK_SRC)) {
581 dss_select_dispc_clk_source(clk_src);
582 dss.lcd_clk_source[idx] = clk_src;
583 return;
584 }
585
586 r = dss.feat->select_lcd_source(channel, clk_src);
587 if (r)
588 return;
589
590 dss.lcd_clk_source[idx] = clk_src;
591}
592
593enum dss_clk_source dss_get_dispc_clk_source(void)
594{
595 return dss.dispc_clk_source;
596}
597
598enum dss_clk_source dss_get_dsi_clk_source(int dsi_module)
599{
600 return dss.dsi_clk_source[dsi_module];
601}
602
603enum dss_clk_source dss_get_lcd_clk_source(enum omap_channel channel)
604{
605 if (dss_has_feature(FEAT_LCD_CLK_SRC)) {
606 int idx = dss_get_channel_index(channel);
607 return dss.lcd_clk_source[idx];
608 } else {
609 /* LCD_CLK source is the same as DISPC_FCLK source for
610 * OMAP2 and OMAP3 */
611 return dss.dispc_clk_source;
612 }
613}
614
615bool dss_div_calc(unsigned long pck, unsigned long fck_min,
616 dss_div_calc_func func, void *data)
617{
618 int fckd, fckd_start, fckd_stop;
619 unsigned long fck;
620 unsigned long fck_hw_max;
621 unsigned long fckd_hw_max;
622 unsigned long prate;
623 unsigned m;
624
625 fck_hw_max = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK);
626
627 if (dss.parent_clk == NULL) {
628 unsigned pckd;
629
630 pckd = fck_hw_max / pck;
631
632 fck = pck * pckd;
633
634 fck = clk_round_rate(dss.dss_clk, fck);
635
636 return func(fck, data);
637 }
638
639 fckd_hw_max = dss.feat->fck_div_max;
640
641 m = dss.feat->dss_fck_multiplier;
642 prate = clk_get_rate(dss.parent_clk);
643
644 fck_min = fck_min ? fck_min : 1;
645
646 fckd_start = min(prate * m / fck_min, fckd_hw_max);
647 fckd_stop = max(DIV_ROUND_UP(prate * m, fck_hw_max), 1ul);
648
649 for (fckd = fckd_start; fckd >= fckd_stop; --fckd) {
650 fck = DIV_ROUND_UP(prate, fckd) * m;
651
652 if (func(fck, data))
653 return true;
654 }
655
656 return false;
657}
658
659int dss_set_fck_rate(unsigned long rate)
660{
661 int r;
662
663 DSSDBG("set fck to %lu\n", rate);
664
665 r = clk_set_rate(dss.dss_clk, rate);
666 if (r)
667 return r;
668
669 dss.dss_clk_rate = clk_get_rate(dss.dss_clk);
670
671 WARN_ONCE(dss.dss_clk_rate != rate,
672 "clk rate mismatch: %lu != %lu", dss.dss_clk_rate,
673 rate);
674
675 return 0;
676}
677
678unsigned long dss_get_dispc_clk_rate(void)
679{
680 return dss.dss_clk_rate;
681}
682
683static int dss_setup_default_clock(void)
684{
685 unsigned long max_dss_fck, prate;
686 unsigned long fck;
687 unsigned fck_div;
688 int r;
689
690 max_dss_fck = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK);
691
692 if (dss.parent_clk == NULL) {
693 fck = clk_round_rate(dss.dss_clk, max_dss_fck);
694 } else {
695 prate = clk_get_rate(dss.parent_clk);
696
697 fck_div = DIV_ROUND_UP(prate * dss.feat->dss_fck_multiplier,
698 max_dss_fck);
699 fck = DIV_ROUND_UP(prate, fck_div) * dss.feat->dss_fck_multiplier;
700 }
701
702 r = dss_set_fck_rate(fck);
703 if (r)
704 return r;
705
706 return 0;
707}
708
709void dss_set_venc_output(enum omap_dss_venc_type type)
710{
711 int l = 0;
712
713 if (type == OMAP_DSS_VENC_TYPE_COMPOSITE)
714 l = 0;
715 else if (type == OMAP_DSS_VENC_TYPE_SVIDEO)
716 l = 1;
717 else
718 BUG();
719
720 /* venc out selection. 0 = comp, 1 = svideo */
721 REG_FLD_MOD(DSS_CONTROL, l, 6, 6);
722}
723
724void dss_set_dac_pwrdn_bgz(bool enable)
725{
726 REG_FLD_MOD(DSS_CONTROL, enable, 5, 5); /* DAC Power-Down Control */
727}
728
729void dss_select_hdmi_venc_clk_source(enum dss_hdmi_venc_clk_source_select src)
730{
731 enum omap_display_type dp;
732 dp = dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_DIGIT);
733
734 /* Complain about invalid selections */
735 WARN_ON((src == DSS_VENC_TV_CLK) && !(dp & OMAP_DISPLAY_TYPE_VENC));
736 WARN_ON((src == DSS_HDMI_M_PCLK) && !(dp & OMAP_DISPLAY_TYPE_HDMI));
737
738 /* Select only if we have options */
739 if ((dp & OMAP_DISPLAY_TYPE_VENC) && (dp & OMAP_DISPLAY_TYPE_HDMI))
740 REG_FLD_MOD(DSS_CONTROL, src, 15, 15); /* VENC_HDMI_SWITCH */
741}
742
743enum dss_hdmi_venc_clk_source_select dss_get_hdmi_venc_clk_source(void)
744{
745 enum omap_display_type displays;
746
747 displays = dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_DIGIT);
748 if ((displays & OMAP_DISPLAY_TYPE_HDMI) == 0)
749 return DSS_VENC_TV_CLK;
750
751 if ((displays & OMAP_DISPLAY_TYPE_VENC) == 0)
752 return DSS_HDMI_M_PCLK;
753
754 return REG_GET(DSS_CONTROL, 15, 15);
755}
756
757static int dss_dpi_select_source_omap2_omap3(int port, enum omap_channel channel)
758{
759 if (channel != OMAP_DSS_CHANNEL_LCD)
760 return -EINVAL;
761
762 return 0;
763}
764
765static int dss_dpi_select_source_omap4(int port, enum omap_channel channel)
766{
767 int val;
768
769 switch (channel) {
770 case OMAP_DSS_CHANNEL_LCD2:
771 val = 0;
772 break;
773 case OMAP_DSS_CHANNEL_DIGIT:
774 val = 1;
775 break;
776 default:
777 return -EINVAL;
778 }
779
780 REG_FLD_MOD(DSS_CONTROL, val, 17, 17);
781
782 return 0;
783}
784
785static int dss_dpi_select_source_omap5(int port, enum omap_channel channel)
786{
787 int val;
788
789 switch (channel) {
790 case OMAP_DSS_CHANNEL_LCD:
791 val = 1;
792 break;
793 case OMAP_DSS_CHANNEL_LCD2:
794 val = 2;
795 break;
796 case OMAP_DSS_CHANNEL_LCD3:
797 val = 3;
798 break;
799 case OMAP_DSS_CHANNEL_DIGIT:
800 val = 0;
801 break;
802 default:
803 return -EINVAL;
804 }
805
806 REG_FLD_MOD(DSS_CONTROL, val, 17, 16);
807
808 return 0;
809}
810
811static int dss_dpi_select_source_dra7xx(int port, enum omap_channel channel)
812{
813 switch (port) {
814 case 0:
815 return dss_dpi_select_source_omap5(port, channel);
816 case 1:
817 if (channel != OMAP_DSS_CHANNEL_LCD2)
818 return -EINVAL;
819 break;
820 case 2:
821 if (channel != OMAP_DSS_CHANNEL_LCD3)
822 return -EINVAL;
823 break;
824 default:
825 return -EINVAL;
826 }
827
828 return 0;
829}
830
831int dss_dpi_select_source(int port, enum omap_channel channel)
832{
833 return dss.feat->dpi_select_source(port, channel);
834}
835
836static int dss_get_clocks(void)
837{
838 struct clk *clk;
839
840 clk = devm_clk_get(&dss.pdev->dev, "fck");
841 if (IS_ERR(clk)) {
842 DSSERR("can't get clock fck\n");
843 return PTR_ERR(clk);
844 }
845
846 dss.dss_clk = clk;
847
848 if (dss.feat->parent_clk_name) {
849 clk = clk_get(NULL, dss.feat->parent_clk_name);
850 if (IS_ERR(clk)) {
851 DSSERR("Failed to get %s\n", dss.feat->parent_clk_name);
852 return PTR_ERR(clk);
853 }
854 } else {
855 clk = NULL;
856 }
857
858 dss.parent_clk = clk;
859
860 return 0;
861}
862
863static void dss_put_clocks(void)
864{
865 if (dss.parent_clk)
866 clk_put(dss.parent_clk);
867}
868
869int dss_runtime_get(void)
870{
871 int r;
872
873 DSSDBG("dss_runtime_get\n");
874
875 r = pm_runtime_get_sync(&dss.pdev->dev);
876 WARN_ON(r < 0);
877 return r < 0 ? r : 0;
878}
879
880void dss_runtime_put(void)
881{
882 int r;
883
884 DSSDBG("dss_runtime_put\n");
885
886 r = pm_runtime_put_sync(&dss.pdev->dev);
887 WARN_ON(r < 0 && r != -ENOSYS && r != -EBUSY);
888}
889
890/* DEBUGFS */
891#if defined(CONFIG_OMAP2_DSS_DEBUGFS)
892void dss_debug_dump_clocks(struct seq_file *s)
893{
894 dss_dump_clocks(s);
895 dispc_dump_clocks(s);
896#ifdef CONFIG_OMAP2_DSS_DSI
897 dsi_dump_clocks(s);
898#endif
899}
900#endif
901
902
903static const enum omap_display_type omap2plus_ports[] = {
904 OMAP_DISPLAY_TYPE_DPI,
905};
906
907static const enum omap_display_type omap34xx_ports[] = {
908 OMAP_DISPLAY_TYPE_DPI,
909 OMAP_DISPLAY_TYPE_SDI,
910};
911
912static const enum omap_display_type dra7xx_ports[] = {
913 OMAP_DISPLAY_TYPE_DPI,
914 OMAP_DISPLAY_TYPE_DPI,
915 OMAP_DISPLAY_TYPE_DPI,
916};
917
918static const struct dss_features omap24xx_dss_feats = {
919 /*
920 * fck div max is really 16, but the divider range has gaps. The range
921 * from 1 to 6 has no gaps, so let's use that as a max.
922 */
923 .fck_div_max = 6,
924 .dss_fck_multiplier = 2,
925 .parent_clk_name = "core_ck",
926 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
927 .ports = omap2plus_ports,
928 .num_ports = ARRAY_SIZE(omap2plus_ports),
929};
930
931static const struct dss_features omap34xx_dss_feats = {
932 .fck_div_max = 16,
933 .dss_fck_multiplier = 2,
934 .parent_clk_name = "dpll4_ck",
935 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
936 .ports = omap34xx_ports,
937 .num_ports = ARRAY_SIZE(omap34xx_ports),
938};
939
940static const struct dss_features omap3630_dss_feats = {
941 .fck_div_max = 32,
942 .dss_fck_multiplier = 1,
943 .parent_clk_name = "dpll4_ck",
944 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
945 .ports = omap2plus_ports,
946 .num_ports = ARRAY_SIZE(omap2plus_ports),
947};
948
949static const struct dss_features omap44xx_dss_feats = {
950 .fck_div_max = 32,
951 .dss_fck_multiplier = 1,
952 .parent_clk_name = "dpll_per_x2_ck",
953 .dpi_select_source = &dss_dpi_select_source_omap4,
954 .ports = omap2plus_ports,
955 .num_ports = ARRAY_SIZE(omap2plus_ports),
956 .select_lcd_source = &dss_lcd_clk_mux_omap4,
957};
958
959static const struct dss_features omap54xx_dss_feats = {
960 .fck_div_max = 64,
961 .dss_fck_multiplier = 1,
962 .parent_clk_name = "dpll_per_x2_ck",
963 .dpi_select_source = &dss_dpi_select_source_omap5,
964 .ports = omap2plus_ports,
965 .num_ports = ARRAY_SIZE(omap2plus_ports),
966 .select_lcd_source = &dss_lcd_clk_mux_omap5,
967};
968
969static const struct dss_features am43xx_dss_feats = {
970 .fck_div_max = 0,
971 .dss_fck_multiplier = 0,
972 .parent_clk_name = NULL,
973 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
974 .ports = omap2plus_ports,
975 .num_ports = ARRAY_SIZE(omap2plus_ports),
976};
977
978static const struct dss_features dra7xx_dss_feats = {
979 .fck_div_max = 64,
980 .dss_fck_multiplier = 1,
981 .parent_clk_name = "dpll_per_x2_ck",
982 .dpi_select_source = &dss_dpi_select_source_dra7xx,
983 .ports = dra7xx_ports,
984 .num_ports = ARRAY_SIZE(dra7xx_ports),
985 .select_lcd_source = &dss_lcd_clk_mux_dra7,
986};
987
988static int dss_init_features(struct platform_device *pdev)
989{
990 const struct dss_features *src;
991 struct dss_features *dst;
992
993 dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL);
994 if (!dst) {
995 dev_err(&pdev->dev, "Failed to allocate local DSS Features\n");
996 return -ENOMEM;
997 }
998
999 switch (omapdss_get_version()) {
1000 case OMAPDSS_VER_OMAP24xx:
1001 src = &omap24xx_dss_feats;
1002 break;
1003
1004 case OMAPDSS_VER_OMAP34xx_ES1:
1005 case OMAPDSS_VER_OMAP34xx_ES3:
1006 case OMAPDSS_VER_AM35xx:
1007 src = &omap34xx_dss_feats;
1008 break;
1009
1010 case OMAPDSS_VER_OMAP3630:
1011 src = &omap3630_dss_feats;
1012 break;
1013
1014 case OMAPDSS_VER_OMAP4430_ES1:
1015 case OMAPDSS_VER_OMAP4430_ES2:
1016 case OMAPDSS_VER_OMAP4:
1017 src = &omap44xx_dss_feats;
1018 break;
1019
1020 case OMAPDSS_VER_OMAP5:
1021 src = &omap54xx_dss_feats;
1022 break;
1023
1024 case OMAPDSS_VER_AM43xx:
1025 src = &am43xx_dss_feats;
1026 break;
1027
1028 case OMAPDSS_VER_DRA7xx:
1029 src = &dra7xx_dss_feats;
1030 break;
1031
1032 default:
1033 return -ENODEV;
1034 }
1035
1036 memcpy(dst, src, sizeof(*dst));
1037 dss.feat = dst;
1038
1039 return 0;
1040}
1041
1042static int dss_init_ports(struct platform_device *pdev)
1043{
1044 struct device_node *parent = pdev->dev.of_node;
1045 struct device_node *port;
1046 int r;
1047
1048 if (parent == NULL)
1049 return 0;
1050
1051 port = omapdss_of_get_next_port(parent, NULL);
1052 if (!port)
1053 return 0;
1054
1055 if (dss.feat->num_ports == 0)
1056 return 0;
1057
1058 do {
1059 enum omap_display_type port_type;
1060 u32 reg;
1061
1062 r = of_property_read_u32(port, "reg", ®);
1063 if (r)
1064 reg = 0;
1065
1066 if (reg >= dss.feat->num_ports)
1067 continue;
1068
1069 port_type = dss.feat->ports[reg];
1070
1071 switch (port_type) {
1072 case OMAP_DISPLAY_TYPE_DPI:
1073 dpi_init_port(pdev, port);
1074 break;
1075 case OMAP_DISPLAY_TYPE_SDI:
1076 sdi_init_port(pdev, port);
1077 break;
1078 default:
1079 break;
1080 }
1081 } while ((port = omapdss_of_get_next_port(parent, port)) != NULL);
1082
1083 return 0;
1084}
1085
1086static void dss_uninit_ports(struct platform_device *pdev)
1087{
1088 struct device_node *parent = pdev->dev.of_node;
1089 struct device_node *port;
1090
1091 if (parent == NULL)
1092 return;
1093
1094 port = omapdss_of_get_next_port(parent, NULL);
1095 if (!port)
1096 return;
1097
1098 if (dss.feat->num_ports == 0)
1099 return;
1100
1101 do {
1102 enum omap_display_type port_type;
1103 u32 reg;
1104 int r;
1105
1106 r = of_property_read_u32(port, "reg", ®);
1107 if (r)
1108 reg = 0;
1109
1110 if (reg >= dss.feat->num_ports)
1111 continue;
1112
1113 port_type = dss.feat->ports[reg];
1114
1115 switch (port_type) {
1116 case OMAP_DISPLAY_TYPE_DPI:
1117 dpi_uninit_port(port);
1118 break;
1119 case OMAP_DISPLAY_TYPE_SDI:
1120 sdi_uninit_port(port);
1121 break;
1122 default:
1123 break;
1124 }
1125 } while ((port = omapdss_of_get_next_port(parent, port)) != NULL);
1126}
1127
1128static int dss_video_pll_probe(struct platform_device *pdev)
1129{
1130 struct device_node *np = pdev->dev.of_node;
1131 struct regulator *pll_regulator;
1132 int r;
1133
1134 if (!np)
1135 return 0;
1136
1137 if (of_property_read_bool(np, "syscon-pll-ctrl")) {
1138 dss.syscon_pll_ctrl = syscon_regmap_lookup_by_phandle(np,
1139 "syscon-pll-ctrl");
1140 if (IS_ERR(dss.syscon_pll_ctrl)) {
1141 dev_err(&pdev->dev,
1142 "failed to get syscon-pll-ctrl regmap\n");
1143 return PTR_ERR(dss.syscon_pll_ctrl);
1144 }
1145
1146 if (of_property_read_u32_index(np, "syscon-pll-ctrl", 1,
1147 &dss.syscon_pll_ctrl_offset)) {
1148 dev_err(&pdev->dev,
1149 "failed to get syscon-pll-ctrl offset\n");
1150 return -EINVAL;
1151 }
1152 }
1153
1154 pll_regulator = devm_regulator_get(&pdev->dev, "vdda_video");
1155 if (IS_ERR(pll_regulator)) {
1156 r = PTR_ERR(pll_regulator);
1157
1158 switch (r) {
1159 case -ENOENT:
1160 pll_regulator = NULL;
1161 break;
1162
1163 case -EPROBE_DEFER:
1164 return -EPROBE_DEFER;
1165
1166 default:
1167 DSSERR("can't get DPLL VDDA regulator\n");
1168 return r;
1169 }
1170 }
1171
1172 if (of_property_match_string(np, "reg-names", "pll1") >= 0) {
1173 dss.video1_pll = dss_video_pll_init(pdev, 0, pll_regulator);
1174 if (IS_ERR(dss.video1_pll))
1175 return PTR_ERR(dss.video1_pll);
1176 }
1177
1178 if (of_property_match_string(np, "reg-names", "pll2") >= 0) {
1179 dss.video2_pll = dss_video_pll_init(pdev, 1, pll_regulator);
1180 if (IS_ERR(dss.video2_pll)) {
1181 dss_video_pll_uninit(dss.video1_pll);
1182 return PTR_ERR(dss.video2_pll);
1183 }
1184 }
1185
1186 return 0;
1187}
1188
1189/* DSS HW IP initialisation */
1190static int dss_bind(struct device *dev)
1191{
1192 struct platform_device *pdev = to_platform_device(dev);
1193 struct resource *dss_mem;
1194 u32 rev;
1195 int r;
1196
1197 dss.pdev = pdev;
1198
1199 r = dss_init_features(dss.pdev);
1200 if (r)
1201 return r;
1202
1203 dss_mem = platform_get_resource(dss.pdev, IORESOURCE_MEM, 0);
1204 if (!dss_mem) {
1205 DSSERR("can't get IORESOURCE_MEM DSS\n");
1206 return -EINVAL;
1207 }
1208
1209 dss.base = devm_ioremap(&pdev->dev, dss_mem->start,
1210 resource_size(dss_mem));
1211 if (!dss.base) {
1212 DSSERR("can't ioremap DSS\n");
1213 return -ENOMEM;
1214 }
1215
1216 r = dss_get_clocks();
1217 if (r)
1218 return r;
1219
1220 r = dss_setup_default_clock();
1221 if (r)
1222 goto err_setup_clocks;
1223
1224 r = dss_video_pll_probe(pdev);
1225 if (r)
1226 goto err_pll_init;
1227
1228 r = dss_init_ports(pdev);
1229 if (r)
1230 goto err_init_ports;
1231
1232 pm_runtime_enable(&pdev->dev);
1233
1234 r = dss_runtime_get();
1235 if (r)
1236 goto err_runtime_get;
1237
1238 dss.dss_clk_rate = clk_get_rate(dss.dss_clk);
1239
1240 /* Select DPLL */
1241 REG_FLD_MOD(DSS_CONTROL, 0, 0, 0);
1242
1243 dss_select_dispc_clk_source(DSS_CLK_SRC_FCK);
1244
1245#ifdef CONFIG_OMAP2_DSS_VENC
1246 REG_FLD_MOD(DSS_CONTROL, 1, 4, 4); /* venc dac demen */
1247 REG_FLD_MOD(DSS_CONTROL, 1, 3, 3); /* venc clock 4x enable */
1248 REG_FLD_MOD(DSS_CONTROL, 0, 2, 2); /* venc clock mode = normal */
1249#endif
1250 dss.dsi_clk_source[0] = DSS_CLK_SRC_FCK;
1251 dss.dsi_clk_source[1] = DSS_CLK_SRC_FCK;
1252 dss.dispc_clk_source = DSS_CLK_SRC_FCK;
1253 dss.lcd_clk_source[0] = DSS_CLK_SRC_FCK;
1254 dss.lcd_clk_source[1] = DSS_CLK_SRC_FCK;
1255
1256 rev = dss_read_reg(DSS_REVISION);
1257 printk(KERN_INFO "OMAP DSS rev %d.%d\n",
1258 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
1259
1260 dss_runtime_put();
1261
1262 r = component_bind_all(&pdev->dev, NULL);
1263 if (r)
1264 goto err_component;
1265
1266 dss_debugfs_create_file("dss", dss_dump_regs);
1267
1268 pm_set_vt_switch(0);
1269
1270 dss_initialized = true;
1271
1272 return 0;
1273
1274err_component:
1275err_runtime_get:
1276 pm_runtime_disable(&pdev->dev);
1277 dss_uninit_ports(pdev);
1278err_init_ports:
1279 if (dss.video1_pll)
1280 dss_video_pll_uninit(dss.video1_pll);
1281
1282 if (dss.video2_pll)
1283 dss_video_pll_uninit(dss.video2_pll);
1284err_pll_init:
1285err_setup_clocks:
1286 dss_put_clocks();
1287 return r;
1288}
1289
1290static void dss_unbind(struct device *dev)
1291{
1292 struct platform_device *pdev = to_platform_device(dev);
1293
1294 dss_initialized = false;
1295
1296 component_unbind_all(&pdev->dev, NULL);
1297
1298 if (dss.video1_pll)
1299 dss_video_pll_uninit(dss.video1_pll);
1300
1301 if (dss.video2_pll)
1302 dss_video_pll_uninit(dss.video2_pll);
1303
1304 dss_uninit_ports(pdev);
1305
1306 pm_runtime_disable(&pdev->dev);
1307
1308 dss_put_clocks();
1309}
1310
1311static const struct component_master_ops dss_component_ops = {
1312 .bind = dss_bind,
1313 .unbind = dss_unbind,
1314};
1315
1316static int dss_component_compare(struct device *dev, void *data)
1317{
1318 struct device *child = data;
1319 return dev == child;
1320}
1321
1322static int dss_add_child_component(struct device *dev, void *data)
1323{
1324 struct component_match **match = data;
1325
1326 /*
1327 * HACK
1328 * We don't have a working driver for rfbi, so skip it here always.
1329 * Otherwise dss will never get probed successfully, as it will wait
1330 * for rfbi to get probed.
1331 */
1332 if (strstr(dev_name(dev), "rfbi"))
1333 return 0;
1334
1335 component_match_add(dev->parent, match, dss_component_compare, dev);
1336
1337 return 0;
1338}
1339
1340static int dss_probe(struct platform_device *pdev)
1341{
1342 struct component_match *match = NULL;
1343 int r;
1344
1345 /* add all the child devices as components */
1346 device_for_each_child(&pdev->dev, &match, dss_add_child_component);
1347
1348 r = component_master_add_with_match(&pdev->dev, &dss_component_ops, match);
1349 if (r)
1350 return r;
1351
1352 return 0;
1353}
1354
1355static int dss_remove(struct platform_device *pdev)
1356{
1357 component_master_del(&pdev->dev, &dss_component_ops);
1358 return 0;
1359}
1360
1361static int dss_runtime_suspend(struct device *dev)
1362{
1363 dss_save_context();
1364 dss_set_min_bus_tput(dev, 0);
1365
1366 pinctrl_pm_select_sleep_state(dev);
1367
1368 return 0;
1369}
1370
1371static int dss_runtime_resume(struct device *dev)
1372{
1373 int r;
1374
1375 pinctrl_pm_select_default_state(dev);
1376
1377 /*
1378 * Set an arbitrarily high tput request to ensure OPP100.
1379 * What we should really do is to make a request to stay in OPP100,
1380 * without any tput requirements, but that is not currently possible
1381 * via the PM layer.
1382 */
1383
1384 r = dss_set_min_bus_tput(dev, 1000000000);
1385 if (r)
1386 return r;
1387
1388 dss_restore_context();
1389 return 0;
1390}
1391
1392static const struct dev_pm_ops dss_pm_ops = {
1393 .runtime_suspend = dss_runtime_suspend,
1394 .runtime_resume = dss_runtime_resume,
1395};
1396
1397static const struct of_device_id dss_of_match[] = {
1398 { .compatible = "ti,omap2-dss", },
1399 { .compatible = "ti,omap3-dss", },
1400 { .compatible = "ti,omap4-dss", },
1401 { .compatible = "ti,omap5-dss", },
1402 { .compatible = "ti,dra7-dss", },
1403 {},
1404};
1405
1406MODULE_DEVICE_TABLE(of, dss_of_match);
1407
1408static struct platform_driver omap_dsshw_driver = {
1409 .probe = dss_probe,
1410 .remove = dss_remove,
1411 .driver = {
1412 .name = "omapdss_dss",
1413 .pm = &dss_pm_ops,
1414 .of_match_table = dss_of_match,
1415 .suppress_bind_attrs = true,
1416 },
1417};
1418
1419int __init dss_init_platform_driver(void)
1420{
1421 return platform_driver_register(&omap_dsshw_driver);
1422}
1423
1424void dss_uninit_platform_driver(void)
1425{
1426 platform_driver_unregister(&omap_dsshw_driver);
1427}