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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// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2009 Nokia Corporation
4 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
5 *
6 * Some code and ideas taken from drivers/video/omap/ driver
7 * by Imre Deak.
8 */
9
10#define DSS_SUBSYS_NAME "DSS"
11
12#include <linux/debugfs.h>
13#include <linux/dma-mapping.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/io.h>
17#include <linux/export.h>
18#include <linux/err.h>
19#include <linux/delay.h>
20#include <linux/seq_file.h>
21#include <linux/clk.h>
22#include <linux/pinctrl/consumer.h>
23#include <linux/platform_device.h>
24#include <linux/pm_runtime.h>
25#include <linux/property.h>
26#include <linux/gfp.h>
27#include <linux/sizes.h>
28#include <linux/mfd/syscon.h>
29#include <linux/regmap.h>
30#include <linux/of.h>
31#include <linux/of_platform.h>
32#include <linux/of_graph.h>
33#include <linux/regulator/consumer.h>
34#include <linux/suspend.h>
35#include <linux/component.h>
36#include <linux/sys_soc.h>
37
38#include "omapdss.h"
39#include "dss.h"
40
41struct dss_reg {
42 u16 idx;
43};
44
45#define DSS_REG(idx) ((const struct dss_reg) { idx })
46
47#define DSS_REVISION DSS_REG(0x0000)
48#define DSS_SYSCONFIG DSS_REG(0x0010)
49#define DSS_SYSSTATUS DSS_REG(0x0014)
50#define DSS_CONTROL DSS_REG(0x0040)
51#define DSS_SDI_CONTROL DSS_REG(0x0044)
52#define DSS_PLL_CONTROL DSS_REG(0x0048)
53#define DSS_SDI_STATUS DSS_REG(0x005C)
54
55#define REG_GET(dss, idx, start, end) \
56 FLD_GET(dss_read_reg(dss, idx), start, end)
57
58#define REG_FLD_MOD(dss, idx, val, start, end) \
59 dss_write_reg(dss, idx, \
60 FLD_MOD(dss_read_reg(dss, idx), val, start, end))
61
62struct dss_ops {
63 int (*dpi_select_source)(struct dss_device *dss, int port,
64 enum omap_channel channel);
65 int (*select_lcd_source)(struct dss_device *dss,
66 enum omap_channel channel,
67 enum dss_clk_source clk_src);
68};
69
70struct dss_features {
71 enum dss_model model;
72 u8 fck_div_max;
73 unsigned int fck_freq_max;
74 u8 dss_fck_multiplier;
75 const char *parent_clk_name;
76 const enum omap_display_type *ports;
77 int num_ports;
78 const enum omap_dss_output_id *outputs;
79 const struct dss_ops *ops;
80 struct dss_reg_field dispc_clk_switch;
81 bool has_lcd_clk_src;
82};
83
84static const char * const dss_generic_clk_source_names[] = {
85 [DSS_CLK_SRC_FCK] = "FCK",
86 [DSS_CLK_SRC_PLL1_1] = "PLL1:1",
87 [DSS_CLK_SRC_PLL1_2] = "PLL1:2",
88 [DSS_CLK_SRC_PLL1_3] = "PLL1:3",
89 [DSS_CLK_SRC_PLL2_1] = "PLL2:1",
90 [DSS_CLK_SRC_PLL2_2] = "PLL2:2",
91 [DSS_CLK_SRC_PLL2_3] = "PLL2:3",
92 [DSS_CLK_SRC_HDMI_PLL] = "HDMI PLL",
93};
94
95static inline void dss_write_reg(struct dss_device *dss,
96 const struct dss_reg idx, u32 val)
97{
98 __raw_writel(val, dss->base + idx.idx);
99}
100
101static inline u32 dss_read_reg(struct dss_device *dss, const struct dss_reg idx)
102{
103 return __raw_readl(dss->base + idx.idx);
104}
105
106#define SR(dss, reg) \
107 dss->ctx[(DSS_##reg).idx / sizeof(u32)] = dss_read_reg(dss, DSS_##reg)
108#define RR(dss, reg) \
109 dss_write_reg(dss, DSS_##reg, dss->ctx[(DSS_##reg).idx / sizeof(u32)])
110
111static void dss_save_context(struct dss_device *dss)
112{
113 DSSDBG("dss_save_context\n");
114
115 SR(dss, CONTROL);
116
117 if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) {
118 SR(dss, SDI_CONTROL);
119 SR(dss, PLL_CONTROL);
120 }
121
122 dss->ctx_valid = true;
123
124 DSSDBG("context saved\n");
125}
126
127static void dss_restore_context(struct dss_device *dss)
128{
129 DSSDBG("dss_restore_context\n");
130
131 if (!dss->ctx_valid)
132 return;
133
134 RR(dss, CONTROL);
135
136 if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) {
137 RR(dss, SDI_CONTROL);
138 RR(dss, PLL_CONTROL);
139 }
140
141 DSSDBG("context restored\n");
142}
143
144#undef SR
145#undef RR
146
147void dss_ctrl_pll_enable(struct dss_pll *pll, bool enable)
148{
149 unsigned int shift;
150 unsigned int val;
151
152 if (!pll->dss->syscon_pll_ctrl)
153 return;
154
155 val = !enable;
156
157 switch (pll->id) {
158 case DSS_PLL_VIDEO1:
159 shift = 0;
160 break;
161 case DSS_PLL_VIDEO2:
162 shift = 1;
163 break;
164 case DSS_PLL_HDMI:
165 shift = 2;
166 break;
167 default:
168 DSSERR("illegal DSS PLL ID %d\n", pll->id);
169 return;
170 }
171
172 regmap_update_bits(pll->dss->syscon_pll_ctrl,
173 pll->dss->syscon_pll_ctrl_offset,
174 1 << shift, val << shift);
175}
176
177static int dss_ctrl_pll_set_control_mux(struct dss_device *dss,
178 enum dss_clk_source clk_src,
179 enum omap_channel channel)
180{
181 unsigned int shift, val;
182
183 if (!dss->syscon_pll_ctrl)
184 return -EINVAL;
185
186 switch (channel) {
187 case OMAP_DSS_CHANNEL_LCD:
188 shift = 3;
189
190 switch (clk_src) {
191 case DSS_CLK_SRC_PLL1_1:
192 val = 0; break;
193 case DSS_CLK_SRC_HDMI_PLL:
194 val = 1; break;
195 default:
196 DSSERR("error in PLL mux config for LCD\n");
197 return -EINVAL;
198 }
199
200 break;
201 case OMAP_DSS_CHANNEL_LCD2:
202 shift = 5;
203
204 switch (clk_src) {
205 case DSS_CLK_SRC_PLL1_3:
206 val = 0; break;
207 case DSS_CLK_SRC_PLL2_3:
208 val = 1; break;
209 case DSS_CLK_SRC_HDMI_PLL:
210 val = 2; break;
211 default:
212 DSSERR("error in PLL mux config for LCD2\n");
213 return -EINVAL;
214 }
215
216 break;
217 case OMAP_DSS_CHANNEL_LCD3:
218 shift = 7;
219
220 switch (clk_src) {
221 case DSS_CLK_SRC_PLL2_1:
222 val = 0; break;
223 case DSS_CLK_SRC_PLL1_3:
224 val = 1; break;
225 case DSS_CLK_SRC_HDMI_PLL:
226 val = 2; break;
227 default:
228 DSSERR("error in PLL mux config for LCD3\n");
229 return -EINVAL;
230 }
231
232 break;
233 default:
234 DSSERR("error in PLL mux config\n");
235 return -EINVAL;
236 }
237
238 regmap_update_bits(dss->syscon_pll_ctrl, dss->syscon_pll_ctrl_offset,
239 0x3 << shift, val << shift);
240
241 return 0;
242}
243
244void dss_sdi_init(struct dss_device *dss, int datapairs)
245{
246 u32 l;
247
248 BUG_ON(datapairs > 3 || datapairs < 1);
249
250 l = dss_read_reg(dss, DSS_SDI_CONTROL);
251 l = FLD_MOD(l, 0xf, 19, 15); /* SDI_PDIV */
252 l = FLD_MOD(l, datapairs-1, 3, 2); /* SDI_PRSEL */
253 l = FLD_MOD(l, 2, 1, 0); /* SDI_BWSEL */
254 dss_write_reg(dss, DSS_SDI_CONTROL, l);
255
256 l = dss_read_reg(dss, DSS_PLL_CONTROL);
257 l = FLD_MOD(l, 0x7, 25, 22); /* SDI_PLL_FREQSEL */
258 l = FLD_MOD(l, 0xb, 16, 11); /* SDI_PLL_REGN */
259 l = FLD_MOD(l, 0xb4, 10, 1); /* SDI_PLL_REGM */
260 dss_write_reg(dss, DSS_PLL_CONTROL, l);
261}
262
263int dss_sdi_enable(struct dss_device *dss)
264{
265 unsigned long timeout;
266
267 dispc_pck_free_enable(dss->dispc, 1);
268
269 /* Reset SDI PLL */
270 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 1, 18, 18); /* SDI_PLL_SYSRESET */
271 udelay(1); /* wait 2x PCLK */
272
273 /* Lock SDI PLL */
274 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 1, 28, 28); /* SDI_PLL_GOBIT */
275
276 /* Waiting for PLL lock request to complete */
277 timeout = jiffies + msecs_to_jiffies(500);
278 while (dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 6)) {
279 if (time_after_eq(jiffies, timeout)) {
280 DSSERR("PLL lock request timed out\n");
281 goto err1;
282 }
283 }
284
285 /* Clearing PLL_GO bit */
286 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 28, 28);
287
288 /* Waiting for PLL to lock */
289 timeout = jiffies + msecs_to_jiffies(500);
290 while (!(dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 5))) {
291 if (time_after_eq(jiffies, timeout)) {
292 DSSERR("PLL lock timed out\n");
293 goto err1;
294 }
295 }
296
297 dispc_lcd_enable_signal(dss->dispc, 1);
298
299 /* Waiting for SDI reset to complete */
300 timeout = jiffies + msecs_to_jiffies(500);
301 while (!(dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 2))) {
302 if (time_after_eq(jiffies, timeout)) {
303 DSSERR("SDI reset timed out\n");
304 goto err2;
305 }
306 }
307
308 return 0;
309
310 err2:
311 dispc_lcd_enable_signal(dss->dispc, 0);
312 err1:
313 /* Reset SDI PLL */
314 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
315
316 dispc_pck_free_enable(dss->dispc, 0);
317
318 return -ETIMEDOUT;
319}
320
321void dss_sdi_disable(struct dss_device *dss)
322{
323 dispc_lcd_enable_signal(dss->dispc, 0);
324
325 dispc_pck_free_enable(dss->dispc, 0);
326
327 /* Reset SDI PLL */
328 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
329}
330
331const char *dss_get_clk_source_name(enum dss_clk_source clk_src)
332{
333 return dss_generic_clk_source_names[clk_src];
334}
335
336static void dss_dump_clocks(struct dss_device *dss, struct seq_file *s)
337{
338 const char *fclk_name;
339 unsigned long fclk_rate;
340
341 if (dss_runtime_get(dss))
342 return;
343
344 seq_printf(s, "- DSS -\n");
345
346 fclk_name = dss_get_clk_source_name(DSS_CLK_SRC_FCK);
347 fclk_rate = clk_get_rate(dss->dss_clk);
348
349 seq_printf(s, "%s = %lu\n",
350 fclk_name,
351 fclk_rate);
352
353 dss_runtime_put(dss);
354}
355
356static int dss_dump_regs(struct seq_file *s, void *p)
357{
358 struct dss_device *dss = s->private;
359
360#define DUMPREG(dss, r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(dss, r))
361
362 if (dss_runtime_get(dss))
363 return 0;
364
365 DUMPREG(dss, DSS_REVISION);
366 DUMPREG(dss, DSS_SYSCONFIG);
367 DUMPREG(dss, DSS_SYSSTATUS);
368 DUMPREG(dss, DSS_CONTROL);
369
370 if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) {
371 DUMPREG(dss, DSS_SDI_CONTROL);
372 DUMPREG(dss, DSS_PLL_CONTROL);
373 DUMPREG(dss, DSS_SDI_STATUS);
374 }
375
376 dss_runtime_put(dss);
377#undef DUMPREG
378 return 0;
379}
380
381static int dss_debug_dump_clocks(struct seq_file *s, void *p)
382{
383 struct dss_device *dss = s->private;
384
385 dss_dump_clocks(dss, s);
386 dispc_dump_clocks(dss->dispc, s);
387 return 0;
388}
389
390static int dss_get_channel_index(enum omap_channel channel)
391{
392 switch (channel) {
393 case OMAP_DSS_CHANNEL_LCD:
394 return 0;
395 case OMAP_DSS_CHANNEL_LCD2:
396 return 1;
397 case OMAP_DSS_CHANNEL_LCD3:
398 return 2;
399 default:
400 WARN_ON(1);
401 return 0;
402 }
403}
404
405static void dss_select_dispc_clk_source(struct dss_device *dss,
406 enum dss_clk_source clk_src)
407{
408 int b;
409
410 /*
411 * We always use PRCM clock as the DISPC func clock, except on DSS3,
412 * where we don't have separate DISPC and LCD clock sources.
413 */
414 if (WARN_ON(dss->feat->has_lcd_clk_src && clk_src != DSS_CLK_SRC_FCK))
415 return;
416
417 switch (clk_src) {
418 case DSS_CLK_SRC_FCK:
419 b = 0;
420 break;
421 case DSS_CLK_SRC_PLL1_1:
422 b = 1;
423 break;
424 case DSS_CLK_SRC_PLL2_1:
425 b = 2;
426 break;
427 default:
428 BUG();
429 return;
430 }
431
432 REG_FLD_MOD(dss, DSS_CONTROL, b, /* DISPC_CLK_SWITCH */
433 dss->feat->dispc_clk_switch.start,
434 dss->feat->dispc_clk_switch.end);
435
436 dss->dispc_clk_source = clk_src;
437}
438
439void dss_select_dsi_clk_source(struct dss_device *dss, int dsi_module,
440 enum dss_clk_source clk_src)
441{
442 int b, pos;
443
444 switch (clk_src) {
445 case DSS_CLK_SRC_FCK:
446 b = 0;
447 break;
448 case DSS_CLK_SRC_PLL1_2:
449 BUG_ON(dsi_module != 0);
450 b = 1;
451 break;
452 case DSS_CLK_SRC_PLL2_2:
453 BUG_ON(dsi_module != 1);
454 b = 1;
455 break;
456 default:
457 BUG();
458 return;
459 }
460
461 pos = dsi_module == 0 ? 1 : 10;
462 REG_FLD_MOD(dss, DSS_CONTROL, b, pos, pos); /* DSIx_CLK_SWITCH */
463
464 dss->dsi_clk_source[dsi_module] = clk_src;
465}
466
467static int dss_lcd_clk_mux_dra7(struct dss_device *dss,
468 enum omap_channel channel,
469 enum dss_clk_source clk_src)
470{
471 const u8 ctrl_bits[] = {
472 [OMAP_DSS_CHANNEL_LCD] = 0,
473 [OMAP_DSS_CHANNEL_LCD2] = 12,
474 [OMAP_DSS_CHANNEL_LCD3] = 19,
475 };
476
477 u8 ctrl_bit = ctrl_bits[channel];
478 int r;
479
480 if (clk_src == DSS_CLK_SRC_FCK) {
481 /* LCDx_CLK_SWITCH */
482 REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
483 return -EINVAL;
484 }
485
486 r = dss_ctrl_pll_set_control_mux(dss, clk_src, channel);
487 if (r)
488 return r;
489
490 REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
491
492 return 0;
493}
494
495static int dss_lcd_clk_mux_omap5(struct dss_device *dss,
496 enum omap_channel channel,
497 enum dss_clk_source clk_src)
498{
499 const u8 ctrl_bits[] = {
500 [OMAP_DSS_CHANNEL_LCD] = 0,
501 [OMAP_DSS_CHANNEL_LCD2] = 12,
502 [OMAP_DSS_CHANNEL_LCD3] = 19,
503 };
504 const enum dss_clk_source allowed_plls[] = {
505 [OMAP_DSS_CHANNEL_LCD] = DSS_CLK_SRC_PLL1_1,
506 [OMAP_DSS_CHANNEL_LCD2] = DSS_CLK_SRC_FCK,
507 [OMAP_DSS_CHANNEL_LCD3] = DSS_CLK_SRC_PLL2_1,
508 };
509
510 u8 ctrl_bit = ctrl_bits[channel];
511
512 if (clk_src == DSS_CLK_SRC_FCK) {
513 /* LCDx_CLK_SWITCH */
514 REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
515 return -EINVAL;
516 }
517
518 if (WARN_ON(allowed_plls[channel] != clk_src))
519 return -EINVAL;
520
521 REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
522
523 return 0;
524}
525
526static int dss_lcd_clk_mux_omap4(struct dss_device *dss,
527 enum omap_channel channel,
528 enum dss_clk_source clk_src)
529{
530 const u8 ctrl_bits[] = {
531 [OMAP_DSS_CHANNEL_LCD] = 0,
532 [OMAP_DSS_CHANNEL_LCD2] = 12,
533 };
534 const enum dss_clk_source allowed_plls[] = {
535 [OMAP_DSS_CHANNEL_LCD] = DSS_CLK_SRC_PLL1_1,
536 [OMAP_DSS_CHANNEL_LCD2] = DSS_CLK_SRC_PLL2_1,
537 };
538
539 u8 ctrl_bit = ctrl_bits[channel];
540
541 if (clk_src == DSS_CLK_SRC_FCK) {
542 /* LCDx_CLK_SWITCH */
543 REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
544 return 0;
545 }
546
547 if (WARN_ON(allowed_plls[channel] != clk_src))
548 return -EINVAL;
549
550 REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
551
552 return 0;
553}
554
555void dss_select_lcd_clk_source(struct dss_device *dss,
556 enum omap_channel channel,
557 enum dss_clk_source clk_src)
558{
559 int idx = dss_get_channel_index(channel);
560 int r;
561
562 if (!dss->feat->has_lcd_clk_src) {
563 dss_select_dispc_clk_source(dss, clk_src);
564 dss->lcd_clk_source[idx] = clk_src;
565 return;
566 }
567
568 r = dss->feat->ops->select_lcd_source(dss, channel, clk_src);
569 if (r)
570 return;
571
572 dss->lcd_clk_source[idx] = clk_src;
573}
574
575enum dss_clk_source dss_get_dispc_clk_source(struct dss_device *dss)
576{
577 return dss->dispc_clk_source;
578}
579
580enum dss_clk_source dss_get_dsi_clk_source(struct dss_device *dss,
581 int dsi_module)
582{
583 return dss->dsi_clk_source[dsi_module];
584}
585
586enum dss_clk_source dss_get_lcd_clk_source(struct dss_device *dss,
587 enum omap_channel channel)
588{
589 if (dss->feat->has_lcd_clk_src) {
590 int idx = dss_get_channel_index(channel);
591 return dss->lcd_clk_source[idx];
592 } else {
593 /* LCD_CLK source is the same as DISPC_FCLK source for
594 * OMAP2 and OMAP3 */
595 return dss->dispc_clk_source;
596 }
597}
598
599bool dss_div_calc(struct dss_device *dss, unsigned long pck,
600 unsigned long fck_min, dss_div_calc_func func, void *data)
601{
602 int fckd, fckd_start, fckd_stop;
603 unsigned long fck;
604 unsigned long fck_hw_max;
605 unsigned long fckd_hw_max;
606 unsigned long prate;
607 unsigned int m;
608
609 fck_hw_max = dss->feat->fck_freq_max;
610
611 if (dss->parent_clk == NULL) {
612 unsigned int pckd;
613
614 pckd = fck_hw_max / pck;
615
616 fck = pck * pckd;
617
618 fck = clk_round_rate(dss->dss_clk, fck);
619
620 return func(fck, data);
621 }
622
623 fckd_hw_max = dss->feat->fck_div_max;
624
625 m = dss->feat->dss_fck_multiplier;
626 prate = clk_get_rate(dss->parent_clk);
627
628 fck_min = fck_min ? fck_min : 1;
629
630 fckd_start = min(prate * m / fck_min, fckd_hw_max);
631 fckd_stop = max(DIV_ROUND_UP(prate * m, fck_hw_max), 1ul);
632
633 for (fckd = fckd_start; fckd >= fckd_stop; --fckd) {
634 fck = DIV_ROUND_UP(prate, fckd) * m;
635
636 if (func(fck, data))
637 return true;
638 }
639
640 return false;
641}
642
643int dss_set_fck_rate(struct dss_device *dss, unsigned long rate)
644{
645 int r;
646
647 DSSDBG("set fck to %lu\n", rate);
648
649 r = clk_set_rate(dss->dss_clk, rate);
650 if (r)
651 return r;
652
653 dss->dss_clk_rate = clk_get_rate(dss->dss_clk);
654
655 WARN_ONCE(dss->dss_clk_rate != rate, "clk rate mismatch: %lu != %lu",
656 dss->dss_clk_rate, rate);
657
658 return 0;
659}
660
661unsigned long dss_get_dispc_clk_rate(struct dss_device *dss)
662{
663 return dss->dss_clk_rate;
664}
665
666unsigned long dss_get_max_fck_rate(struct dss_device *dss)
667{
668 return dss->feat->fck_freq_max;
669}
670
671static int dss_setup_default_clock(struct dss_device *dss)
672{
673 unsigned long max_dss_fck, prate;
674 unsigned long fck;
675 unsigned int fck_div;
676 int r;
677
678 max_dss_fck = dss->feat->fck_freq_max;
679
680 if (dss->parent_clk == NULL) {
681 fck = clk_round_rate(dss->dss_clk, max_dss_fck);
682 } else {
683 prate = clk_get_rate(dss->parent_clk);
684
685 fck_div = DIV_ROUND_UP(prate * dss->feat->dss_fck_multiplier,
686 max_dss_fck);
687 fck = DIV_ROUND_UP(prate, fck_div)
688 * dss->feat->dss_fck_multiplier;
689 }
690
691 r = dss_set_fck_rate(dss, fck);
692 if (r)
693 return r;
694
695 return 0;
696}
697
698void dss_set_venc_output(struct dss_device *dss, enum omap_dss_venc_type type)
699{
700 int l = 0;
701
702 if (type == OMAP_DSS_VENC_TYPE_COMPOSITE)
703 l = 0;
704 else if (type == OMAP_DSS_VENC_TYPE_SVIDEO)
705 l = 1;
706 else
707 BUG();
708
709 /* venc out selection. 0 = comp, 1 = svideo */
710 REG_FLD_MOD(dss, DSS_CONTROL, l, 6, 6);
711}
712
713void dss_set_dac_pwrdn_bgz(struct dss_device *dss, bool enable)
714{
715 /* DAC Power-Down Control */
716 REG_FLD_MOD(dss, DSS_CONTROL, enable, 5, 5);
717}
718
719void dss_select_hdmi_venc_clk_source(struct dss_device *dss,
720 enum dss_hdmi_venc_clk_source_select src)
721{
722 enum omap_dss_output_id outputs;
723
724 outputs = dss->feat->outputs[OMAP_DSS_CHANNEL_DIGIT];
725
726 /* Complain about invalid selections */
727 WARN_ON((src == DSS_VENC_TV_CLK) && !(outputs & OMAP_DSS_OUTPUT_VENC));
728 WARN_ON((src == DSS_HDMI_M_PCLK) && !(outputs & OMAP_DSS_OUTPUT_HDMI));
729
730 /* Select only if we have options */
731 if ((outputs & OMAP_DSS_OUTPUT_VENC) &&
732 (outputs & OMAP_DSS_OUTPUT_HDMI))
733 /* VENC_HDMI_SWITCH */
734 REG_FLD_MOD(dss, DSS_CONTROL, src, 15, 15);
735}
736
737static int dss_dpi_select_source_omap2_omap3(struct dss_device *dss, int port,
738 enum omap_channel channel)
739{
740 if (channel != OMAP_DSS_CHANNEL_LCD)
741 return -EINVAL;
742
743 return 0;
744}
745
746static int dss_dpi_select_source_omap4(struct dss_device *dss, int port,
747 enum omap_channel channel)
748{
749 int val;
750
751 switch (channel) {
752 case OMAP_DSS_CHANNEL_LCD2:
753 val = 0;
754 break;
755 case OMAP_DSS_CHANNEL_DIGIT:
756 val = 1;
757 break;
758 default:
759 return -EINVAL;
760 }
761
762 REG_FLD_MOD(dss, DSS_CONTROL, val, 17, 17);
763
764 return 0;
765}
766
767static int dss_dpi_select_source_omap5(struct dss_device *dss, int port,
768 enum omap_channel channel)
769{
770 int val;
771
772 switch (channel) {
773 case OMAP_DSS_CHANNEL_LCD:
774 val = 1;
775 break;
776 case OMAP_DSS_CHANNEL_LCD2:
777 val = 2;
778 break;
779 case OMAP_DSS_CHANNEL_LCD3:
780 val = 3;
781 break;
782 case OMAP_DSS_CHANNEL_DIGIT:
783 val = 0;
784 break;
785 default:
786 return -EINVAL;
787 }
788
789 REG_FLD_MOD(dss, DSS_CONTROL, val, 17, 16);
790
791 return 0;
792}
793
794static int dss_dpi_select_source_dra7xx(struct dss_device *dss, int port,
795 enum omap_channel channel)
796{
797 switch (port) {
798 case 0:
799 return dss_dpi_select_source_omap5(dss, port, channel);
800 case 1:
801 if (channel != OMAP_DSS_CHANNEL_LCD2)
802 return -EINVAL;
803 break;
804 case 2:
805 if (channel != OMAP_DSS_CHANNEL_LCD3)
806 return -EINVAL;
807 break;
808 default:
809 return -EINVAL;
810 }
811
812 return 0;
813}
814
815int dss_dpi_select_source(struct dss_device *dss, int port,
816 enum omap_channel channel)
817{
818 return dss->feat->ops->dpi_select_source(dss, port, channel);
819}
820
821static int dss_get_clocks(struct dss_device *dss)
822{
823 struct clk *clk;
824
825 clk = devm_clk_get(&dss->pdev->dev, "fck");
826 if (IS_ERR(clk)) {
827 DSSERR("can't get clock fck\n");
828 return PTR_ERR(clk);
829 }
830
831 dss->dss_clk = clk;
832
833 if (dss->feat->parent_clk_name) {
834 clk = clk_get(NULL, dss->feat->parent_clk_name);
835 if (IS_ERR(clk)) {
836 DSSERR("Failed to get %s\n",
837 dss->feat->parent_clk_name);
838 return PTR_ERR(clk);
839 }
840 } else {
841 clk = NULL;
842 }
843
844 dss->parent_clk = clk;
845
846 return 0;
847}
848
849static void dss_put_clocks(struct dss_device *dss)
850{
851 if (dss->parent_clk)
852 clk_put(dss->parent_clk);
853}
854
855int dss_runtime_get(struct dss_device *dss)
856{
857 int r;
858
859 DSSDBG("dss_runtime_get\n");
860
861 r = pm_runtime_get_sync(&dss->pdev->dev);
862 if (WARN_ON(r < 0)) {
863 pm_runtime_put_noidle(&dss->pdev->dev);
864 return r;
865 }
866 return 0;
867}
868
869void dss_runtime_put(struct dss_device *dss)
870{
871 int r;
872
873 DSSDBG("dss_runtime_put\n");
874
875 r = pm_runtime_put_sync(&dss->pdev->dev);
876 WARN_ON(r < 0 && r != -ENOSYS && r != -EBUSY);
877}
878
879struct dss_device *dss_get_device(struct device *dev)
880{
881 return dev_get_drvdata(dev);
882}
883
884/* DEBUGFS */
885#if defined(CONFIG_OMAP2_DSS_DEBUGFS)
886static int dss_initialize_debugfs(struct dss_device *dss)
887{
888 struct dentry *dir;
889
890 dir = debugfs_create_dir("omapdss", NULL);
891 if (IS_ERR(dir))
892 return PTR_ERR(dir);
893
894 dss->debugfs.root = dir;
895
896 return 0;
897}
898
899static void dss_uninitialize_debugfs(struct dss_device *dss)
900{
901 debugfs_remove_recursive(dss->debugfs.root);
902}
903
904struct dss_debugfs_entry {
905 struct dentry *dentry;
906 int (*show_fn)(struct seq_file *s, void *data);
907 void *data;
908};
909
910static int dss_debug_open(struct inode *inode, struct file *file)
911{
912 struct dss_debugfs_entry *entry = inode->i_private;
913
914 return single_open(file, entry->show_fn, entry->data);
915}
916
917static const struct file_operations dss_debug_fops = {
918 .open = dss_debug_open,
919 .read = seq_read,
920 .llseek = seq_lseek,
921 .release = single_release,
922};
923
924struct dss_debugfs_entry *
925dss_debugfs_create_file(struct dss_device *dss, const char *name,
926 int (*show_fn)(struct seq_file *s, void *data),
927 void *data)
928{
929 struct dss_debugfs_entry *entry;
930
931 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
932 if (!entry)
933 return ERR_PTR(-ENOMEM);
934
935 entry->show_fn = show_fn;
936 entry->data = data;
937 entry->dentry = debugfs_create_file(name, 0444, dss->debugfs.root,
938 entry, &dss_debug_fops);
939
940 return entry;
941}
942
943void dss_debugfs_remove_file(struct dss_debugfs_entry *entry)
944{
945 if (IS_ERR_OR_NULL(entry))
946 return;
947
948 debugfs_remove(entry->dentry);
949 kfree(entry);
950}
951
952#else /* CONFIG_OMAP2_DSS_DEBUGFS */
953static inline int dss_initialize_debugfs(struct dss_device *dss)
954{
955 return 0;
956}
957static inline void dss_uninitialize_debugfs(struct dss_device *dss)
958{
959}
960#endif /* CONFIG_OMAP2_DSS_DEBUGFS */
961
962static const struct dss_ops dss_ops_omap2_omap3 = {
963 .dpi_select_source = &dss_dpi_select_source_omap2_omap3,
964};
965
966static const struct dss_ops dss_ops_omap4 = {
967 .dpi_select_source = &dss_dpi_select_source_omap4,
968 .select_lcd_source = &dss_lcd_clk_mux_omap4,
969};
970
971static const struct dss_ops dss_ops_omap5 = {
972 .dpi_select_source = &dss_dpi_select_source_omap5,
973 .select_lcd_source = &dss_lcd_clk_mux_omap5,
974};
975
976static const struct dss_ops dss_ops_dra7 = {
977 .dpi_select_source = &dss_dpi_select_source_dra7xx,
978 .select_lcd_source = &dss_lcd_clk_mux_dra7,
979};
980
981static const enum omap_display_type omap2plus_ports[] = {
982 OMAP_DISPLAY_TYPE_DPI,
983};
984
985static const enum omap_display_type omap34xx_ports[] = {
986 OMAP_DISPLAY_TYPE_DPI,
987 OMAP_DISPLAY_TYPE_SDI,
988};
989
990static const enum omap_display_type dra7xx_ports[] = {
991 OMAP_DISPLAY_TYPE_DPI,
992 OMAP_DISPLAY_TYPE_DPI,
993 OMAP_DISPLAY_TYPE_DPI,
994};
995
996static const enum omap_dss_output_id omap2_dss_supported_outputs[] = {
997 /* OMAP_DSS_CHANNEL_LCD */
998 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI,
999
1000 /* OMAP_DSS_CHANNEL_DIGIT */
1001 OMAP_DSS_OUTPUT_VENC,
1002};
1003
1004static const enum omap_dss_output_id omap3430_dss_supported_outputs[] = {
1005 /* OMAP_DSS_CHANNEL_LCD */
1006 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1007 OMAP_DSS_OUTPUT_SDI | OMAP_DSS_OUTPUT_DSI1,
1008
1009 /* OMAP_DSS_CHANNEL_DIGIT */
1010 OMAP_DSS_OUTPUT_VENC,
1011};
1012
1013static const enum omap_dss_output_id omap3630_dss_supported_outputs[] = {
1014 /* OMAP_DSS_CHANNEL_LCD */
1015 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1016 OMAP_DSS_OUTPUT_DSI1,
1017
1018 /* OMAP_DSS_CHANNEL_DIGIT */
1019 OMAP_DSS_OUTPUT_VENC,
1020};
1021
1022static const enum omap_dss_output_id am43xx_dss_supported_outputs[] = {
1023 /* OMAP_DSS_CHANNEL_LCD */
1024 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI,
1025};
1026
1027static const enum omap_dss_output_id omap4_dss_supported_outputs[] = {
1028 /* OMAP_DSS_CHANNEL_LCD */
1029 OMAP_DSS_OUTPUT_DBI | OMAP_DSS_OUTPUT_DSI1,
1030
1031 /* OMAP_DSS_CHANNEL_DIGIT */
1032 OMAP_DSS_OUTPUT_VENC | OMAP_DSS_OUTPUT_HDMI,
1033
1034 /* OMAP_DSS_CHANNEL_LCD2 */
1035 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1036 OMAP_DSS_OUTPUT_DSI2,
1037};
1038
1039static const enum omap_dss_output_id omap5_dss_supported_outputs[] = {
1040 /* OMAP_DSS_CHANNEL_LCD */
1041 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1042 OMAP_DSS_OUTPUT_DSI1 | OMAP_DSS_OUTPUT_DSI2,
1043
1044 /* OMAP_DSS_CHANNEL_DIGIT */
1045 OMAP_DSS_OUTPUT_HDMI,
1046
1047 /* OMAP_DSS_CHANNEL_LCD2 */
1048 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1049 OMAP_DSS_OUTPUT_DSI1,
1050
1051 /* OMAP_DSS_CHANNEL_LCD3 */
1052 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1053 OMAP_DSS_OUTPUT_DSI2,
1054};
1055
1056static const struct dss_features omap24xx_dss_feats = {
1057 .model = DSS_MODEL_OMAP2,
1058 /*
1059 * fck div max is really 16, but the divider range has gaps. The range
1060 * from 1 to 6 has no gaps, so let's use that as a max.
1061 */
1062 .fck_div_max = 6,
1063 .fck_freq_max = 133000000,
1064 .dss_fck_multiplier = 2,
1065 .parent_clk_name = "core_ck",
1066 .ports = omap2plus_ports,
1067 .num_ports = ARRAY_SIZE(omap2plus_ports),
1068 .outputs = omap2_dss_supported_outputs,
1069 .ops = &dss_ops_omap2_omap3,
1070 .dispc_clk_switch = { 0, 0 },
1071 .has_lcd_clk_src = false,
1072};
1073
1074static const struct dss_features omap34xx_dss_feats = {
1075 .model = DSS_MODEL_OMAP3,
1076 .fck_div_max = 16,
1077 .fck_freq_max = 173000000,
1078 .dss_fck_multiplier = 2,
1079 .parent_clk_name = "dpll4_ck",
1080 .ports = omap34xx_ports,
1081 .outputs = omap3430_dss_supported_outputs,
1082 .num_ports = ARRAY_SIZE(omap34xx_ports),
1083 .ops = &dss_ops_omap2_omap3,
1084 .dispc_clk_switch = { 0, 0 },
1085 .has_lcd_clk_src = false,
1086};
1087
1088static const struct dss_features omap3630_dss_feats = {
1089 .model = DSS_MODEL_OMAP3,
1090 .fck_div_max = 31,
1091 .fck_freq_max = 173000000,
1092 .dss_fck_multiplier = 1,
1093 .parent_clk_name = "dpll4_ck",
1094 .ports = omap2plus_ports,
1095 .num_ports = ARRAY_SIZE(omap2plus_ports),
1096 .outputs = omap3630_dss_supported_outputs,
1097 .ops = &dss_ops_omap2_omap3,
1098 .dispc_clk_switch = { 0, 0 },
1099 .has_lcd_clk_src = false,
1100};
1101
1102static const struct dss_features omap44xx_dss_feats = {
1103 .model = DSS_MODEL_OMAP4,
1104 .fck_div_max = 32,
1105 .fck_freq_max = 186000000,
1106 .dss_fck_multiplier = 1,
1107 .parent_clk_name = "dpll_per_x2_ck",
1108 .ports = omap2plus_ports,
1109 .num_ports = ARRAY_SIZE(omap2plus_ports),
1110 .outputs = omap4_dss_supported_outputs,
1111 .ops = &dss_ops_omap4,
1112 .dispc_clk_switch = { 9, 8 },
1113 .has_lcd_clk_src = true,
1114};
1115
1116static const struct dss_features omap54xx_dss_feats = {
1117 .model = DSS_MODEL_OMAP5,
1118 .fck_div_max = 64,
1119 .fck_freq_max = 209250000,
1120 .dss_fck_multiplier = 1,
1121 .parent_clk_name = "dpll_per_x2_ck",
1122 .ports = omap2plus_ports,
1123 .num_ports = ARRAY_SIZE(omap2plus_ports),
1124 .outputs = omap5_dss_supported_outputs,
1125 .ops = &dss_ops_omap5,
1126 .dispc_clk_switch = { 9, 7 },
1127 .has_lcd_clk_src = true,
1128};
1129
1130static const struct dss_features am43xx_dss_feats = {
1131 .model = DSS_MODEL_OMAP3,
1132 .fck_div_max = 0,
1133 .fck_freq_max = 200000000,
1134 .dss_fck_multiplier = 0,
1135 .parent_clk_name = NULL,
1136 .ports = omap2plus_ports,
1137 .num_ports = ARRAY_SIZE(omap2plus_ports),
1138 .outputs = am43xx_dss_supported_outputs,
1139 .ops = &dss_ops_omap2_omap3,
1140 .dispc_clk_switch = { 0, 0 },
1141 .has_lcd_clk_src = true,
1142};
1143
1144static const struct dss_features dra7xx_dss_feats = {
1145 .model = DSS_MODEL_DRA7,
1146 .fck_div_max = 64,
1147 .fck_freq_max = 209250000,
1148 .dss_fck_multiplier = 1,
1149 .parent_clk_name = "dpll_per_x2_ck",
1150 .ports = dra7xx_ports,
1151 .num_ports = ARRAY_SIZE(dra7xx_ports),
1152 .outputs = omap5_dss_supported_outputs,
1153 .ops = &dss_ops_dra7,
1154 .dispc_clk_switch = { 9, 7 },
1155 .has_lcd_clk_src = true,
1156};
1157
1158static void __dss_uninit_ports(struct dss_device *dss, unsigned int num_ports)
1159{
1160 struct platform_device *pdev = dss->pdev;
1161 struct device_node *parent = pdev->dev.of_node;
1162 struct device_node *port;
1163 unsigned int i;
1164
1165 for (i = 0; i < num_ports; i++) {
1166 port = of_graph_get_port_by_id(parent, i);
1167 if (!port)
1168 continue;
1169
1170 switch (dss->feat->ports[i]) {
1171 case OMAP_DISPLAY_TYPE_DPI:
1172 dpi_uninit_port(port);
1173 break;
1174 case OMAP_DISPLAY_TYPE_SDI:
1175 sdi_uninit_port(port);
1176 break;
1177 default:
1178 break;
1179 }
1180 of_node_put(port);
1181 }
1182}
1183
1184static int dss_init_ports(struct dss_device *dss)
1185{
1186 struct platform_device *pdev = dss->pdev;
1187 struct device_node *parent = pdev->dev.of_node;
1188 struct device_node *port;
1189 unsigned int i;
1190 int r;
1191
1192 for (i = 0; i < dss->feat->num_ports; i++) {
1193 port = of_graph_get_port_by_id(parent, i);
1194 if (!port)
1195 continue;
1196
1197 switch (dss->feat->ports[i]) {
1198 case OMAP_DISPLAY_TYPE_DPI:
1199 r = dpi_init_port(dss, pdev, port, dss->feat->model);
1200 if (r)
1201 goto error;
1202 break;
1203
1204 case OMAP_DISPLAY_TYPE_SDI:
1205 r = sdi_init_port(dss, pdev, port);
1206 if (r)
1207 goto error;
1208 break;
1209
1210 default:
1211 break;
1212 }
1213 of_node_put(port);
1214 }
1215
1216 return 0;
1217
1218error:
1219 of_node_put(port);
1220 __dss_uninit_ports(dss, i);
1221 return r;
1222}
1223
1224static void dss_uninit_ports(struct dss_device *dss)
1225{
1226 __dss_uninit_ports(dss, dss->feat->num_ports);
1227}
1228
1229static int dss_video_pll_probe(struct dss_device *dss)
1230{
1231 struct platform_device *pdev = dss->pdev;
1232 struct device_node *np = pdev->dev.of_node;
1233 struct regulator *pll_regulator;
1234 int r;
1235
1236 if (!np)
1237 return 0;
1238
1239 if (of_property_read_bool(np, "syscon-pll-ctrl")) {
1240 dss->syscon_pll_ctrl = syscon_regmap_lookup_by_phandle(np,
1241 "syscon-pll-ctrl");
1242 if (IS_ERR(dss->syscon_pll_ctrl)) {
1243 dev_err(&pdev->dev,
1244 "failed to get syscon-pll-ctrl regmap\n");
1245 return PTR_ERR(dss->syscon_pll_ctrl);
1246 }
1247
1248 if (of_property_read_u32_index(np, "syscon-pll-ctrl", 1,
1249 &dss->syscon_pll_ctrl_offset)) {
1250 dev_err(&pdev->dev,
1251 "failed to get syscon-pll-ctrl offset\n");
1252 return -EINVAL;
1253 }
1254 }
1255
1256 pll_regulator = devm_regulator_get(&pdev->dev, "vdda_video");
1257 if (IS_ERR(pll_regulator)) {
1258 r = PTR_ERR(pll_regulator);
1259
1260 switch (r) {
1261 case -ENOENT:
1262 pll_regulator = NULL;
1263 break;
1264
1265 case -EPROBE_DEFER:
1266 return -EPROBE_DEFER;
1267
1268 default:
1269 DSSERR("can't get DPLL VDDA regulator\n");
1270 return r;
1271 }
1272 }
1273
1274 if (of_property_match_string(np, "reg-names", "pll1") >= 0) {
1275 dss->video1_pll = dss_video_pll_init(dss, pdev, 0,
1276 pll_regulator);
1277 if (IS_ERR(dss->video1_pll))
1278 return PTR_ERR(dss->video1_pll);
1279 }
1280
1281 if (of_property_match_string(np, "reg-names", "pll2") >= 0) {
1282 dss->video2_pll = dss_video_pll_init(dss, pdev, 1,
1283 pll_regulator);
1284 if (IS_ERR(dss->video2_pll)) {
1285 dss_video_pll_uninit(dss->video1_pll);
1286 return PTR_ERR(dss->video2_pll);
1287 }
1288 }
1289
1290 return 0;
1291}
1292
1293/* DSS HW IP initialisation */
1294static const struct of_device_id dss_of_match[] = {
1295 { .compatible = "ti,omap2-dss", .data = &omap24xx_dss_feats },
1296 { .compatible = "ti,omap3-dss", .data = &omap3630_dss_feats },
1297 { .compatible = "ti,omap4-dss", .data = &omap44xx_dss_feats },
1298 { .compatible = "ti,omap5-dss", .data = &omap54xx_dss_feats },
1299 { .compatible = "ti,dra7-dss", .data = &dra7xx_dss_feats },
1300 {},
1301};
1302MODULE_DEVICE_TABLE(of, dss_of_match);
1303
1304static const struct soc_device_attribute dss_soc_devices[] = {
1305 { .machine = "OMAP3430/3530", .data = &omap34xx_dss_feats },
1306 { .machine = "AM35??", .data = &omap34xx_dss_feats },
1307 { .family = "AM43xx", .data = &am43xx_dss_feats },
1308 { /* sentinel */ }
1309};
1310
1311static int dss_bind(struct device *dev)
1312{
1313 struct dss_device *dss = dev_get_drvdata(dev);
1314 struct platform_device *drm_pdev;
1315 struct dss_pdata pdata;
1316 int r;
1317
1318 r = component_bind_all(dev, NULL);
1319 if (r)
1320 return r;
1321
1322 pm_set_vt_switch(0);
1323
1324 pdata.dss = dss;
1325 drm_pdev = platform_device_register_data(NULL, "omapdrm", 0,
1326 &pdata, sizeof(pdata));
1327 if (IS_ERR(drm_pdev)) {
1328 component_unbind_all(dev, NULL);
1329 return PTR_ERR(drm_pdev);
1330 }
1331
1332 dss->drm_pdev = drm_pdev;
1333
1334 return 0;
1335}
1336
1337static void dss_unbind(struct device *dev)
1338{
1339 struct dss_device *dss = dev_get_drvdata(dev);
1340
1341 platform_device_unregister(dss->drm_pdev);
1342
1343 component_unbind_all(dev, NULL);
1344}
1345
1346static const struct component_master_ops dss_component_ops = {
1347 .bind = dss_bind,
1348 .unbind = dss_unbind,
1349};
1350
1351struct dss_component_match_data {
1352 struct device *dev;
1353 struct component_match **match;
1354};
1355
1356static int dss_add_child_component(struct device *dev, void *data)
1357{
1358 struct dss_component_match_data *cmatch = data;
1359 struct component_match **match = cmatch->match;
1360
1361 /*
1362 * HACK
1363 * We don't have a working driver for rfbi, so skip it here always.
1364 * Otherwise dss will never get probed successfully, as it will wait
1365 * for rfbi to get probed.
1366 */
1367 if (strstr(dev_name(dev), "rfbi"))
1368 return 0;
1369
1370 /*
1371 * Handle possible interconnect target modules defined within the DSS.
1372 * The DSS components can be children of an interconnect target module
1373 * after the device tree has been updated for the module data.
1374 * See also omapdss_boot_init() for compatible fixup.
1375 */
1376 if (strstr(dev_name(dev), "target-module"))
1377 return device_for_each_child(dev, cmatch,
1378 dss_add_child_component);
1379
1380 component_match_add(cmatch->dev, match, component_compare_dev, dev);
1381
1382 return 0;
1383}
1384
1385static int dss_probe_hardware(struct dss_device *dss)
1386{
1387 u32 rev;
1388 int r;
1389
1390 r = dss_runtime_get(dss);
1391 if (r)
1392 return r;
1393
1394 dss->dss_clk_rate = clk_get_rate(dss->dss_clk);
1395
1396 /* Select DPLL */
1397 REG_FLD_MOD(dss, DSS_CONTROL, 0, 0, 0);
1398
1399 dss_select_dispc_clk_source(dss, DSS_CLK_SRC_FCK);
1400
1401#ifdef CONFIG_OMAP2_DSS_VENC
1402 REG_FLD_MOD(dss, DSS_CONTROL, 1, 4, 4); /* venc dac demen */
1403 REG_FLD_MOD(dss, DSS_CONTROL, 1, 3, 3); /* venc clock 4x enable */
1404 REG_FLD_MOD(dss, DSS_CONTROL, 0, 2, 2); /* venc clock mode = normal */
1405#endif
1406 dss->dsi_clk_source[0] = DSS_CLK_SRC_FCK;
1407 dss->dsi_clk_source[1] = DSS_CLK_SRC_FCK;
1408 dss->dispc_clk_source = DSS_CLK_SRC_FCK;
1409 dss->lcd_clk_source[0] = DSS_CLK_SRC_FCK;
1410 dss->lcd_clk_source[1] = DSS_CLK_SRC_FCK;
1411
1412 rev = dss_read_reg(dss, DSS_REVISION);
1413 pr_info("OMAP DSS rev %d.%d\n", FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
1414
1415 dss_runtime_put(dss);
1416
1417 return 0;
1418}
1419
1420static int dss_probe(struct platform_device *pdev)
1421{
1422 const struct soc_device_attribute *soc;
1423 struct dss_component_match_data cmatch;
1424 struct component_match *match = NULL;
1425 struct dss_device *dss;
1426 int r;
1427
1428 dss = kzalloc(sizeof(*dss), GFP_KERNEL);
1429 if (!dss)
1430 return -ENOMEM;
1431
1432 dss->pdev = pdev;
1433 platform_set_drvdata(pdev, dss);
1434
1435 r = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1436 if (r) {
1437 dev_err(&pdev->dev, "Failed to set the DMA mask\n");
1438 goto err_free_dss;
1439 }
1440
1441 /*
1442 * The various OMAP3-based SoCs can't be told apart using the compatible
1443 * string, use SoC device matching.
1444 */
1445 soc = soc_device_match(dss_soc_devices);
1446 if (soc)
1447 dss->feat = soc->data;
1448 else
1449 dss->feat = device_get_match_data(&pdev->dev);
1450
1451 /* Map I/O registers, get and setup clocks. */
1452 dss->base = devm_platform_ioremap_resource(pdev, 0);
1453 if (IS_ERR(dss->base)) {
1454 r = PTR_ERR(dss->base);
1455 goto err_free_dss;
1456 }
1457
1458 r = dss_get_clocks(dss);
1459 if (r)
1460 goto err_free_dss;
1461
1462 r = dss_setup_default_clock(dss);
1463 if (r)
1464 goto err_put_clocks;
1465
1466 /* Setup the video PLLs and the DPI and SDI ports. */
1467 r = dss_video_pll_probe(dss);
1468 if (r)
1469 goto err_put_clocks;
1470
1471 r = dss_init_ports(dss);
1472 if (r)
1473 goto err_uninit_plls;
1474
1475 /* Enable runtime PM and probe the hardware. */
1476 pm_runtime_enable(&pdev->dev);
1477
1478 r = dss_probe_hardware(dss);
1479 if (r)
1480 goto err_pm_runtime_disable;
1481
1482 /* Initialize debugfs. */
1483 r = dss_initialize_debugfs(dss);
1484 if (r)
1485 goto err_pm_runtime_disable;
1486
1487 dss->debugfs.clk = dss_debugfs_create_file(dss, "clk",
1488 dss_debug_dump_clocks, dss);
1489 dss->debugfs.dss = dss_debugfs_create_file(dss, "dss", dss_dump_regs,
1490 dss);
1491
1492 /* Add all the child devices as components. */
1493 r = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
1494 if (r)
1495 goto err_uninit_debugfs;
1496
1497 omapdss_gather_components(&pdev->dev);
1498
1499 cmatch.dev = &pdev->dev;
1500 cmatch.match = &match;
1501 device_for_each_child(&pdev->dev, &cmatch, dss_add_child_component);
1502
1503 r = component_master_add_with_match(&pdev->dev, &dss_component_ops, match);
1504 if (r)
1505 goto err_of_depopulate;
1506
1507 return 0;
1508
1509err_of_depopulate:
1510 of_platform_depopulate(&pdev->dev);
1511
1512err_uninit_debugfs:
1513 dss_debugfs_remove_file(dss->debugfs.clk);
1514 dss_debugfs_remove_file(dss->debugfs.dss);
1515 dss_uninitialize_debugfs(dss);
1516
1517err_pm_runtime_disable:
1518 pm_runtime_disable(&pdev->dev);
1519 dss_uninit_ports(dss);
1520
1521err_uninit_plls:
1522 if (dss->video1_pll)
1523 dss_video_pll_uninit(dss->video1_pll);
1524 if (dss->video2_pll)
1525 dss_video_pll_uninit(dss->video2_pll);
1526
1527err_put_clocks:
1528 dss_put_clocks(dss);
1529
1530err_free_dss:
1531 kfree(dss);
1532
1533 return r;
1534}
1535
1536static void dss_remove(struct platform_device *pdev)
1537{
1538 struct dss_device *dss = platform_get_drvdata(pdev);
1539
1540 of_platform_depopulate(&pdev->dev);
1541
1542 component_master_del(&pdev->dev, &dss_component_ops);
1543
1544 dss_debugfs_remove_file(dss->debugfs.clk);
1545 dss_debugfs_remove_file(dss->debugfs.dss);
1546 dss_uninitialize_debugfs(dss);
1547
1548 pm_runtime_disable(&pdev->dev);
1549
1550 dss_uninit_ports(dss);
1551
1552 if (dss->video1_pll)
1553 dss_video_pll_uninit(dss->video1_pll);
1554
1555 if (dss->video2_pll)
1556 dss_video_pll_uninit(dss->video2_pll);
1557
1558 dss_put_clocks(dss);
1559
1560 kfree(dss);
1561}
1562
1563static void dss_shutdown(struct platform_device *pdev)
1564{
1565 DSSDBG("shutdown\n");
1566}
1567
1568static __maybe_unused int dss_runtime_suspend(struct device *dev)
1569{
1570 struct dss_device *dss = dev_get_drvdata(dev);
1571
1572 dss_save_context(dss);
1573 dss_set_min_bus_tput(dev, 0);
1574
1575 pinctrl_pm_select_sleep_state(dev);
1576
1577 return 0;
1578}
1579
1580static __maybe_unused int dss_runtime_resume(struct device *dev)
1581{
1582 struct dss_device *dss = dev_get_drvdata(dev);
1583 int r;
1584
1585 pinctrl_pm_select_default_state(dev);
1586
1587 /*
1588 * Set an arbitrarily high tput request to ensure OPP100.
1589 * What we should really do is to make a request to stay in OPP100,
1590 * without any tput requirements, but that is not currently possible
1591 * via the PM layer.
1592 */
1593
1594 r = dss_set_min_bus_tput(dev, 1000000000);
1595 if (r)
1596 return r;
1597
1598 dss_restore_context(dss);
1599 return 0;
1600}
1601
1602static const struct dev_pm_ops dss_pm_ops = {
1603 SET_RUNTIME_PM_OPS(dss_runtime_suspend, dss_runtime_resume, NULL)
1604 SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
1605};
1606
1607struct platform_driver omap_dsshw_driver = {
1608 .probe = dss_probe,
1609 .remove_new = dss_remove,
1610 .shutdown = dss_shutdown,
1611 .driver = {
1612 .name = "omapdss_dss",
1613 .pm = &dss_pm_ops,
1614 .of_match_table = dss_of_match,
1615 .suppress_bind_attrs = true,
1616 },
1617};
1618
1619/* INIT */
1620static struct platform_driver * const omap_dss_drivers[] = {
1621 &omap_dsshw_driver,
1622 &omap_dispchw_driver,
1623#ifdef CONFIG_OMAP2_DSS_DSI
1624 &omap_dsihw_driver,
1625#endif
1626#ifdef CONFIG_OMAP2_DSS_VENC
1627 &omap_venchw_driver,
1628#endif
1629#ifdef CONFIG_OMAP4_DSS_HDMI
1630 &omapdss_hdmi4hw_driver,
1631#endif
1632#ifdef CONFIG_OMAP5_DSS_HDMI
1633 &omapdss_hdmi5hw_driver,
1634#endif
1635};
1636
1637int __init omap_dss_init(void)
1638{
1639 return platform_register_drivers(omap_dss_drivers,
1640 ARRAY_SIZE(omap_dss_drivers));
1641}
1642
1643void omap_dss_exit(void)
1644{
1645 platform_unregister_drivers(omap_dss_drivers,
1646 ARRAY_SIZE(omap_dss_drivers));
1647}