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20#define DSS_SUBSYS_NAME "HDMI"
21
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/err.h>
25#include <linux/io.h>
26#include <linux/interrupt.h>
27#include <linux/mutex.h>
28#include <linux/delay.h>
29#include <linux/string.h>
30#include <linux/platform_device.h>
31#include <linux/pm_runtime.h>
32#include <linux/clk.h>
33#include <linux/gpio.h>
34#include <linux/regulator/consumer.h>
35#include <linux/component.h>
36#include <linux/of.h>
37#include <sound/omap-hdmi-audio.h>
38
39#include "omapdss.h"
40#include "hdmi4_core.h"
41#include "dss.h"
42#include "dss_features.h"
43#include "hdmi.h"
44
45static struct omap_hdmi hdmi;
46
47static int hdmi_runtime_get(void)
48{
49 int r;
50
51 DSSDBG("hdmi_runtime_get\n");
52
53 r = pm_runtime_get_sync(&hdmi.pdev->dev);
54 WARN_ON(r < 0);
55 if (r < 0)
56 return r;
57
58 return 0;
59}
60
61static void hdmi_runtime_put(void)
62{
63 int r;
64
65 DSSDBG("hdmi_runtime_put\n");
66
67 r = pm_runtime_put_sync(&hdmi.pdev->dev);
68 WARN_ON(r < 0 && r != -ENOSYS);
69}
70
71static irqreturn_t hdmi_irq_handler(int irq, void *data)
72{
73 struct hdmi_wp_data *wp = data;
74 u32 irqstatus;
75
76 irqstatus = hdmi_wp_get_irqstatus(wp);
77 hdmi_wp_set_irqstatus(wp, irqstatus);
78
79 if ((irqstatus & HDMI_IRQ_LINK_CONNECT) &&
80 irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
81
82
83
84
85
86
87 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF);
88
89 hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT |
90 HDMI_IRQ_LINK_DISCONNECT);
91
92 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
93 } else if (irqstatus & HDMI_IRQ_LINK_CONNECT) {
94 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_TXON);
95 } else if (irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
96 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
97 }
98
99 return IRQ_HANDLED;
100}
101
102static int hdmi_init_regulator(void)
103{
104 struct regulator *reg;
105
106 if (hdmi.vdda_reg != NULL)
107 return 0;
108
109 reg = devm_regulator_get(&hdmi.pdev->dev, "vdda");
110
111 if (IS_ERR(reg)) {
112 if (PTR_ERR(reg) != -EPROBE_DEFER)
113 DSSERR("can't get VDDA regulator\n");
114 return PTR_ERR(reg);
115 }
116
117 hdmi.vdda_reg = reg;
118
119 return 0;
120}
121
122static int hdmi_power_on_core(struct omap_dss_device *dssdev)
123{
124 int r;
125
126 r = regulator_enable(hdmi.vdda_reg);
127 if (r)
128 return r;
129
130 r = hdmi_runtime_get();
131 if (r)
132 goto err_runtime_get;
133
134
135 dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK);
136
137 hdmi.core_enabled = true;
138
139 return 0;
140
141err_runtime_get:
142 regulator_disable(hdmi.vdda_reg);
143
144 return r;
145}
146
147static void hdmi_power_off_core(struct omap_dss_device *dssdev)
148{
149 hdmi.core_enabled = false;
150
151 hdmi_runtime_put();
152 regulator_disable(hdmi.vdda_reg);
153}
154
155static int hdmi_power_on_full(struct omap_dss_device *dssdev)
156{
157 int r;
158 struct omap_video_timings *p;
159 enum omap_channel channel = dssdev->dispc_channel;
160 struct hdmi_wp_data *wp = &hdmi.wp;
161 struct dss_pll_clock_info hdmi_cinfo = { 0 };
162 unsigned pc;
163
164 r = hdmi_power_on_core(dssdev);
165 if (r)
166 return r;
167
168
169 hdmi_wp_clear_irqenable(wp, 0xffffffff);
170 hdmi_wp_set_irqstatus(wp, 0xffffffff);
171
172 p = &hdmi.cfg.timings;
173
174 DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res);
175
176 pc = p->pixelclock;
177 if (p->double_pixel)
178 pc *= 2;
179
180
181 pc *= 10;
182
183 dss_pll_calc_b(&hdmi.pll.pll, clk_get_rate(hdmi.pll.pll.clkin),
184 pc, &hdmi_cinfo);
185
186 r = dss_pll_enable(&hdmi.pll.pll);
187 if (r) {
188 DSSERR("Failed to enable PLL\n");
189 goto err_pll_enable;
190 }
191
192 r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo);
193 if (r) {
194 DSSERR("Failed to configure PLL\n");
195 goto err_pll_cfg;
196 }
197
198 r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco,
199 hdmi_cinfo.clkout[0]);
200 if (r) {
201 DSSDBG("Failed to configure PHY\n");
202 goto err_phy_cfg;
203 }
204
205 r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
206 if (r)
207 goto err_phy_pwr;
208
209 hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg);
210
211
212 dss_mgr_set_timings(channel, p);
213
214 r = dss_mgr_enable(channel);
215 if (r)
216 goto err_mgr_enable;
217
218 r = hdmi_wp_video_start(&hdmi.wp);
219 if (r)
220 goto err_vid_enable;
221
222 hdmi_wp_set_irqenable(wp,
223 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);
224
225 return 0;
226
227err_vid_enable:
228 dss_mgr_disable(channel);
229err_mgr_enable:
230 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
231err_phy_pwr:
232err_phy_cfg:
233err_pll_cfg:
234 dss_pll_disable(&hdmi.pll.pll);
235err_pll_enable:
236 hdmi_power_off_core(dssdev);
237 return -EIO;
238}
239
240static void hdmi_power_off_full(struct omap_dss_device *dssdev)
241{
242 enum omap_channel channel = dssdev->dispc_channel;
243
244 hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);
245
246 hdmi_wp_video_stop(&hdmi.wp);
247
248 dss_mgr_disable(channel);
249
250 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
251
252 dss_pll_disable(&hdmi.pll.pll);
253
254 hdmi_power_off_core(dssdev);
255}
256
257static int hdmi_display_check_timing(struct omap_dss_device *dssdev,
258 struct omap_video_timings *timings)
259{
260 if (!dispc_mgr_timings_ok(dssdev->dispc_channel, timings))
261 return -EINVAL;
262
263 return 0;
264}
265
266static void hdmi_display_set_timing(struct omap_dss_device *dssdev,
267 struct omap_video_timings *timings)
268{
269 mutex_lock(&hdmi.lock);
270
271 hdmi.cfg.timings = *timings;
272
273 dispc_set_tv_pclk(timings->pixelclock);
274
275 mutex_unlock(&hdmi.lock);
276}
277
278static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
279 struct omap_video_timings *timings)
280{
281 *timings = hdmi.cfg.timings;
282}
283
284static void hdmi_dump_regs(struct seq_file *s)
285{
286 mutex_lock(&hdmi.lock);
287
288 if (hdmi_runtime_get()) {
289 mutex_unlock(&hdmi.lock);
290 return;
291 }
292
293 hdmi_wp_dump(&hdmi.wp, s);
294 hdmi_pll_dump(&hdmi.pll, s);
295 hdmi_phy_dump(&hdmi.phy, s);
296 hdmi4_core_dump(&hdmi.core, s);
297
298 hdmi_runtime_put();
299 mutex_unlock(&hdmi.lock);
300}
301
302static int read_edid(u8 *buf, int len)
303{
304 int r;
305
306 mutex_lock(&hdmi.lock);
307
308 r = hdmi_runtime_get();
309 BUG_ON(r);
310
311 r = hdmi4_read_edid(&hdmi.core, buf, len);
312
313 hdmi_runtime_put();
314 mutex_unlock(&hdmi.lock);
315
316 return r;
317}
318
319static void hdmi_start_audio_stream(struct omap_hdmi *hd)
320{
321 hdmi_wp_audio_enable(&hd->wp, true);
322 hdmi4_audio_start(&hd->core, &hd->wp);
323}
324
325static void hdmi_stop_audio_stream(struct omap_hdmi *hd)
326{
327 hdmi4_audio_stop(&hd->core, &hd->wp);
328 hdmi_wp_audio_enable(&hd->wp, false);
329}
330
331static int hdmi_display_enable(struct omap_dss_device *dssdev)
332{
333 struct omap_dss_device *out = &hdmi.output;
334 unsigned long flags;
335 int r = 0;
336
337 DSSDBG("ENTER hdmi_display_enable\n");
338
339 mutex_lock(&hdmi.lock);
340
341 if (!out->dispc_channel_connected) {
342 DSSERR("failed to enable display: no output/manager\n");
343 r = -ENODEV;
344 goto err0;
345 }
346
347 r = hdmi_power_on_full(dssdev);
348 if (r) {
349 DSSERR("failed to power on device\n");
350 goto err0;
351 }
352
353 if (hdmi.audio_configured) {
354 r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config,
355 hdmi.cfg.timings.pixelclock);
356 if (r) {
357 DSSERR("Error restoring audio configuration: %d", r);
358 hdmi.audio_abort_cb(&hdmi.pdev->dev);
359 hdmi.audio_configured = false;
360 }
361 }
362
363 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
364 if (hdmi.audio_configured && hdmi.audio_playing)
365 hdmi_start_audio_stream(&hdmi);
366 hdmi.display_enabled = true;
367 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
368
369 mutex_unlock(&hdmi.lock);
370 return 0;
371
372err0:
373 mutex_unlock(&hdmi.lock);
374 return r;
375}
376
377static void hdmi_display_disable(struct omap_dss_device *dssdev)
378{
379 unsigned long flags;
380
381 DSSDBG("Enter hdmi_display_disable\n");
382
383 mutex_lock(&hdmi.lock);
384
385 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
386 hdmi_stop_audio_stream(&hdmi);
387 hdmi.display_enabled = false;
388 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
389
390 hdmi_power_off_full(dssdev);
391
392 mutex_unlock(&hdmi.lock);
393}
394
395static int hdmi_core_enable(struct omap_dss_device *dssdev)
396{
397 int r = 0;
398
399 DSSDBG("ENTER omapdss_hdmi_core_enable\n");
400
401 mutex_lock(&hdmi.lock);
402
403 r = hdmi_power_on_core(dssdev);
404 if (r) {
405 DSSERR("failed to power on device\n");
406 goto err0;
407 }
408
409 mutex_unlock(&hdmi.lock);
410 return 0;
411
412err0:
413 mutex_unlock(&hdmi.lock);
414 return r;
415}
416
417static void hdmi_core_disable(struct omap_dss_device *dssdev)
418{
419 DSSDBG("Enter omapdss_hdmi_core_disable\n");
420
421 mutex_lock(&hdmi.lock);
422
423 hdmi_power_off_core(dssdev);
424
425 mutex_unlock(&hdmi.lock);
426}
427
428static int hdmi_connect(struct omap_dss_device *dssdev,
429 struct omap_dss_device *dst)
430{
431 enum omap_channel channel = dssdev->dispc_channel;
432 int r;
433
434 r = hdmi_init_regulator();
435 if (r)
436 return r;
437
438 r = dss_mgr_connect(channel, dssdev);
439 if (r)
440 return r;
441
442 r = omapdss_output_set_device(dssdev, dst);
443 if (r) {
444 DSSERR("failed to connect output to new device: %s\n",
445 dst->name);
446 dss_mgr_disconnect(channel, dssdev);
447 return r;
448 }
449
450 return 0;
451}
452
453static void hdmi_disconnect(struct omap_dss_device *dssdev,
454 struct omap_dss_device *dst)
455{
456 enum omap_channel channel = dssdev->dispc_channel;
457
458 WARN_ON(dst != dssdev->dst);
459
460 if (dst != dssdev->dst)
461 return;
462
463 omapdss_output_unset_device(dssdev);
464
465 dss_mgr_disconnect(channel, dssdev);
466}
467
468static int hdmi_read_edid(struct omap_dss_device *dssdev,
469 u8 *edid, int len)
470{
471 bool need_enable;
472 int r;
473
474 need_enable = hdmi.core_enabled == false;
475
476 if (need_enable) {
477 r = hdmi_core_enable(dssdev);
478 if (r)
479 return r;
480 }
481
482 r = read_edid(edid, len);
483
484 if (need_enable)
485 hdmi_core_disable(dssdev);
486
487 return r;
488}
489
490static int hdmi_set_infoframe(struct omap_dss_device *dssdev,
491 const struct hdmi_avi_infoframe *avi)
492{
493 hdmi.cfg.infoframe = *avi;
494 return 0;
495}
496
497static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev,
498 bool hdmi_mode)
499{
500 hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI;
501 return 0;
502}
503
504static const struct omapdss_hdmi_ops hdmi_ops = {
505 .connect = hdmi_connect,
506 .disconnect = hdmi_disconnect,
507
508 .enable = hdmi_display_enable,
509 .disable = hdmi_display_disable,
510
511 .check_timings = hdmi_display_check_timing,
512 .set_timings = hdmi_display_set_timing,
513 .get_timings = hdmi_display_get_timings,
514
515 .read_edid = hdmi_read_edid,
516 .set_infoframe = hdmi_set_infoframe,
517 .set_hdmi_mode = hdmi_set_hdmi_mode,
518};
519
520static void hdmi_init_output(struct platform_device *pdev)
521{
522 struct omap_dss_device *out = &hdmi.output;
523
524 out->dev = &pdev->dev;
525 out->id = OMAP_DSS_OUTPUT_HDMI;
526 out->output_type = OMAP_DISPLAY_TYPE_HDMI;
527 out->name = "hdmi.0";
528 out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
529 out->ops.hdmi = &hdmi_ops;
530 out->owner = THIS_MODULE;
531
532 omapdss_register_output(out);
533}
534
535static void hdmi_uninit_output(struct platform_device *pdev)
536{
537 struct omap_dss_device *out = &hdmi.output;
538
539 omapdss_unregister_output(out);
540}
541
542static int hdmi_probe_of(struct platform_device *pdev)
543{
544 struct device_node *node = pdev->dev.of_node;
545 struct device_node *ep;
546 int r;
547
548 ep = omapdss_of_get_first_endpoint(node);
549 if (!ep)
550 return 0;
551
552 r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy);
553 if (r)
554 goto err;
555
556 of_node_put(ep);
557 return 0;
558
559err:
560 of_node_put(ep);
561 return r;
562}
563
564
565static int hdmi_audio_startup(struct device *dev,
566 void (*abort_cb)(struct device *dev))
567{
568 struct omap_hdmi *hd = dev_get_drvdata(dev);
569 int ret = 0;
570
571 mutex_lock(&hd->lock);
572
573 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
574 ret = -EPERM;
575 goto out;
576 }
577
578 hd->audio_abort_cb = abort_cb;
579
580out:
581 mutex_unlock(&hd->lock);
582
583 return ret;
584}
585
586static int hdmi_audio_shutdown(struct device *dev)
587{
588 struct omap_hdmi *hd = dev_get_drvdata(dev);
589
590 mutex_lock(&hd->lock);
591 hd->audio_abort_cb = NULL;
592 hd->audio_configured = false;
593 hd->audio_playing = false;
594 mutex_unlock(&hd->lock);
595
596 return 0;
597}
598
599static int hdmi_audio_start(struct device *dev)
600{
601 struct omap_hdmi *hd = dev_get_drvdata(dev);
602 unsigned long flags;
603
604 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
605
606 spin_lock_irqsave(&hd->audio_playing_lock, flags);
607
608 if (hd->display_enabled)
609 hdmi_start_audio_stream(hd);
610 hd->audio_playing = true;
611
612 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
613 return 0;
614}
615
616static void hdmi_audio_stop(struct device *dev)
617{
618 struct omap_hdmi *hd = dev_get_drvdata(dev);
619 unsigned long flags;
620
621 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
622
623 spin_lock_irqsave(&hd->audio_playing_lock, flags);
624
625 if (hd->display_enabled)
626 hdmi_stop_audio_stream(hd);
627 hd->audio_playing = false;
628
629 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
630}
631
632static int hdmi_audio_config(struct device *dev,
633 struct omap_dss_audio *dss_audio)
634{
635 struct omap_hdmi *hd = dev_get_drvdata(dev);
636 int ret;
637
638 mutex_lock(&hd->lock);
639
640 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
641 ret = -EPERM;
642 goto out;
643 }
644
645 ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
646 hd->cfg.timings.pixelclock);
647 if (!ret) {
648 hd->audio_configured = true;
649 hd->audio_config = *dss_audio;
650 }
651out:
652 mutex_unlock(&hd->lock);
653
654 return ret;
655}
656
657static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
658 .audio_startup = hdmi_audio_startup,
659 .audio_shutdown = hdmi_audio_shutdown,
660 .audio_start = hdmi_audio_start,
661 .audio_stop = hdmi_audio_stop,
662 .audio_config = hdmi_audio_config,
663};
664
665static int hdmi_audio_register(struct device *dev)
666{
667 struct omap_hdmi_audio_pdata pdata = {
668 .dev = dev,
669 .dss_version = omapdss_get_version(),
670 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),
671 .ops = &hdmi_audio_ops,
672 };
673
674 hdmi.audio_pdev = platform_device_register_data(
675 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
676 &pdata, sizeof(pdata));
677
678 if (IS_ERR(hdmi.audio_pdev))
679 return PTR_ERR(hdmi.audio_pdev);
680
681 return 0;
682}
683
684
685static int hdmi4_bind(struct device *dev, struct device *master, void *data)
686{
687 struct platform_device *pdev = to_platform_device(dev);
688 int r;
689 int irq;
690
691 hdmi.pdev = pdev;
692 dev_set_drvdata(&pdev->dev, &hdmi);
693
694 mutex_init(&hdmi.lock);
695 spin_lock_init(&hdmi.audio_playing_lock);
696
697 if (pdev->dev.of_node) {
698 r = hdmi_probe_of(pdev);
699 if (r)
700 return r;
701 }
702
703 r = hdmi_wp_init(pdev, &hdmi.wp);
704 if (r)
705 return r;
706
707 r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp);
708 if (r)
709 return r;
710
711 r = hdmi_phy_init(pdev, &hdmi.phy);
712 if (r)
713 goto err;
714
715 r = hdmi4_core_init(pdev, &hdmi.core);
716 if (r)
717 goto err;
718
719 irq = platform_get_irq(pdev, 0);
720 if (irq < 0) {
721 DSSERR("platform_get_irq failed\n");
722 r = -ENODEV;
723 goto err;
724 }
725
726 r = devm_request_threaded_irq(&pdev->dev, irq,
727 NULL, hdmi_irq_handler,
728 IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp);
729 if (r) {
730 DSSERR("HDMI IRQ request failed\n");
731 goto err;
732 }
733
734 pm_runtime_enable(&pdev->dev);
735
736 hdmi_init_output(pdev);
737
738 r = hdmi_audio_register(&pdev->dev);
739 if (r) {
740 DSSERR("Registering HDMI audio failed\n");
741 hdmi_uninit_output(pdev);
742 pm_runtime_disable(&pdev->dev);
743 return r;
744 }
745
746 dss_debugfs_create_file("hdmi", hdmi_dump_regs);
747
748 return 0;
749err:
750 hdmi_pll_uninit(&hdmi.pll);
751 return r;
752}
753
754static void hdmi4_unbind(struct device *dev, struct device *master, void *data)
755{
756 struct platform_device *pdev = to_platform_device(dev);
757
758 if (hdmi.audio_pdev)
759 platform_device_unregister(hdmi.audio_pdev);
760
761 hdmi_uninit_output(pdev);
762
763 hdmi_pll_uninit(&hdmi.pll);
764
765 pm_runtime_disable(&pdev->dev);
766}
767
768static const struct component_ops hdmi4_component_ops = {
769 .bind = hdmi4_bind,
770 .unbind = hdmi4_unbind,
771};
772
773static int hdmi4_probe(struct platform_device *pdev)
774{
775 return component_add(&pdev->dev, &hdmi4_component_ops);
776}
777
778static int hdmi4_remove(struct platform_device *pdev)
779{
780 component_del(&pdev->dev, &hdmi4_component_ops);
781 return 0;
782}
783
784static int hdmi_runtime_suspend(struct device *dev)
785{
786 dispc_runtime_put();
787
788 return 0;
789}
790
791static int hdmi_runtime_resume(struct device *dev)
792{
793 int r;
794
795 r = dispc_runtime_get();
796 if (r < 0)
797 return r;
798
799 return 0;
800}
801
802static const struct dev_pm_ops hdmi_pm_ops = {
803 .runtime_suspend = hdmi_runtime_suspend,
804 .runtime_resume = hdmi_runtime_resume,
805};
806
807static const struct of_device_id hdmi_of_match[] = {
808 { .compatible = "ti,omap4-hdmi", },
809 {},
810};
811
812static struct platform_driver omapdss_hdmihw_driver = {
813 .probe = hdmi4_probe,
814 .remove = hdmi4_remove,
815 .driver = {
816 .name = "omapdss_hdmi",
817 .pm = &hdmi_pm_ops,
818 .of_match_table = hdmi_of_match,
819 .suppress_bind_attrs = true,
820 },
821};
822
823int __init hdmi4_init_platform_driver(void)
824{
825 return platform_driver_register(&omapdss_hdmihw_driver);
826}
827
828void hdmi4_uninit_platform_driver(void)
829{
830 platform_driver_unregister(&omapdss_hdmihw_driver);
831}
832
