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8
9#define DSS_SUBSYS_NAME "HDMI"
10
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/err.h>
14#include <linux/io.h>
15#include <linux/interrupt.h>
16#include <linux/mutex.h>
17#include <linux/delay.h>
18#include <linux/string.h>
19#include <linux/platform_device.h>
20#include <linux/pm_runtime.h>
21#include <linux/clk.h>
22#include <linux/gpio.h>
23#include <linux/regulator/consumer.h>
24#include <linux/component.h>
25#include <video/omapfb_dss.h>
26#include <sound/omap-hdmi-audio.h>
27
28#include "hdmi4_core.h"
29#include "dss.h"
30#include "dss_features.h"
31#include "hdmi.h"
32
33static struct omap_hdmi hdmi;
34
35static int hdmi_runtime_get(void)
36{
37 int r;
38
39 DSSDBG("hdmi_runtime_get\n");
40
41 r = pm_runtime_get_sync(&hdmi.pdev->dev);
42 if (WARN_ON(r < 0)) {
43 pm_runtime_put_sync(&hdmi.pdev->dev);
44 return r;
45 }
46
47 return 0;
48}
49
50static void hdmi_runtime_put(void)
51{
52 int r;
53
54 DSSDBG("hdmi_runtime_put\n");
55
56 r = pm_runtime_put_sync(&hdmi.pdev->dev);
57 WARN_ON(r < 0 && r != -ENOSYS);
58}
59
60static irqreturn_t hdmi_irq_handler(int irq, void *data)
61{
62 struct hdmi_wp_data *wp = data;
63 u32 irqstatus;
64
65 irqstatus = hdmi_wp_get_irqstatus(wp);
66 hdmi_wp_set_irqstatus(wp, irqstatus);
67
68 if ((irqstatus & HDMI_IRQ_LINK_CONNECT) &&
69 irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
70
71
72
73
74
75
76 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF);
77
78 hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT |
79 HDMI_IRQ_LINK_DISCONNECT);
80
81 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
82 } else if (irqstatus & HDMI_IRQ_LINK_CONNECT) {
83 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_TXON);
84 } else if (irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
85 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
86 }
87
88 return IRQ_HANDLED;
89}
90
91static int hdmi_init_regulator(void)
92{
93 struct regulator *reg;
94
95 if (hdmi.vdda_reg != NULL)
96 return 0;
97
98 reg = devm_regulator_get(&hdmi.pdev->dev, "vdda");
99
100 if (IS_ERR(reg)) {
101 if (PTR_ERR(reg) != -EPROBE_DEFER)
102 DSSERR("can't get VDDA regulator\n");
103 return PTR_ERR(reg);
104 }
105
106 hdmi.vdda_reg = reg;
107
108 return 0;
109}
110
111static int hdmi_power_on_core(struct omap_dss_device *dssdev)
112{
113 int r;
114
115 r = regulator_enable(hdmi.vdda_reg);
116 if (r)
117 return r;
118
119 r = hdmi_runtime_get();
120 if (r)
121 goto err_runtime_get;
122
123
124 dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK);
125
126 hdmi.core_enabled = true;
127
128 return 0;
129
130err_runtime_get:
131 regulator_disable(hdmi.vdda_reg);
132
133 return r;
134}
135
136static void hdmi_power_off_core(struct omap_dss_device *dssdev)
137{
138 hdmi.core_enabled = false;
139
140 hdmi_runtime_put();
141 regulator_disable(hdmi.vdda_reg);
142}
143
144static int hdmi_power_on_full(struct omap_dss_device *dssdev)
145{
146 int r;
147 struct omap_video_timings *p;
148 struct omap_overlay_manager *mgr = hdmi.output.manager;
149 struct hdmi_wp_data *wp = &hdmi.wp;
150 struct dss_pll_clock_info hdmi_cinfo = { 0 };
151
152 r = hdmi_power_on_core(dssdev);
153 if (r)
154 return r;
155
156
157 hdmi_wp_clear_irqenable(wp, 0xffffffff);
158 hdmi_wp_set_irqstatus(wp, 0xffffffff);
159
160 p = &hdmi.cfg.timings;
161
162 DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res);
163
164 hdmi_pll_compute(&hdmi.pll, p->pixelclock, &hdmi_cinfo);
165
166 r = dss_pll_enable(&hdmi.pll.pll);
167 if (r) {
168 DSSERR("Failed to enable PLL\n");
169 goto err_pll_enable;
170 }
171
172 r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo);
173 if (r) {
174 DSSERR("Failed to configure PLL\n");
175 goto err_pll_cfg;
176 }
177
178 r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco,
179 hdmi_cinfo.clkout[0]);
180 if (r) {
181 DSSDBG("Failed to configure PHY\n");
182 goto err_phy_cfg;
183 }
184
185 r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
186 if (r)
187 goto err_phy_pwr;
188
189 hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg);
190
191
192 dispc_enable_gamma_table(0);
193
194
195 dss_mgr_set_timings(mgr, p);
196
197 r = hdmi_wp_video_start(&hdmi.wp);
198 if (r)
199 goto err_vid_enable;
200
201 r = dss_mgr_enable(mgr);
202 if (r)
203 goto err_mgr_enable;
204
205 hdmi_wp_set_irqenable(wp,
206 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);
207
208 return 0;
209
210err_mgr_enable:
211 hdmi_wp_video_stop(&hdmi.wp);
212err_vid_enable:
213 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
214err_phy_pwr:
215err_phy_cfg:
216err_pll_cfg:
217 dss_pll_disable(&hdmi.pll.pll);
218err_pll_enable:
219 hdmi_power_off_core(dssdev);
220 return -EIO;
221}
222
223static void hdmi_power_off_full(struct omap_dss_device *dssdev)
224{
225 struct omap_overlay_manager *mgr = hdmi.output.manager;
226
227 hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);
228
229 dss_mgr_disable(mgr);
230
231 hdmi_wp_video_stop(&hdmi.wp);
232
233 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
234
235 dss_pll_disable(&hdmi.pll.pll);
236
237 hdmi_power_off_core(dssdev);
238}
239
240static int hdmi_display_check_timing(struct omap_dss_device *dssdev,
241 struct omap_video_timings *timings)
242{
243 struct omap_dss_device *out = &hdmi.output;
244
245 if (!dispc_mgr_timings_ok(out->dispc_channel, timings))
246 return -EINVAL;
247
248 return 0;
249}
250
251static void hdmi_display_set_timing(struct omap_dss_device *dssdev,
252 struct omap_video_timings *timings)
253{
254 mutex_lock(&hdmi.lock);
255
256 hdmi.cfg.timings = *timings;
257
258 dispc_set_tv_pclk(timings->pixelclock);
259
260 mutex_unlock(&hdmi.lock);
261}
262
263static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
264 struct omap_video_timings *timings)
265{
266 *timings = hdmi.cfg.timings;
267}
268
269static void hdmi_dump_regs(struct seq_file *s)
270{
271 mutex_lock(&hdmi.lock);
272
273 if (hdmi_runtime_get()) {
274 mutex_unlock(&hdmi.lock);
275 return;
276 }
277
278 hdmi_wp_dump(&hdmi.wp, s);
279 hdmi_pll_dump(&hdmi.pll, s);
280 hdmi_phy_dump(&hdmi.phy, s);
281 hdmi4_core_dump(&hdmi.core, s);
282
283 hdmi_runtime_put();
284 mutex_unlock(&hdmi.lock);
285}
286
287static int read_edid(u8 *buf, int len)
288{
289 int r;
290
291 mutex_lock(&hdmi.lock);
292
293 r = hdmi_runtime_get();
294 BUG_ON(r);
295
296 r = hdmi4_read_edid(&hdmi.core, buf, len);
297
298 hdmi_runtime_put();
299 mutex_unlock(&hdmi.lock);
300
301 return r;
302}
303
304static void hdmi_start_audio_stream(struct omap_hdmi *hd)
305{
306 hdmi_wp_audio_enable(&hd->wp, true);
307 hdmi4_audio_start(&hd->core, &hd->wp);
308}
309
310static void hdmi_stop_audio_stream(struct omap_hdmi *hd)
311{
312 hdmi4_audio_stop(&hd->core, &hd->wp);
313 hdmi_wp_audio_enable(&hd->wp, false);
314}
315
316static int hdmi_display_enable(struct omap_dss_device *dssdev)
317{
318 struct omap_dss_device *out = &hdmi.output;
319 unsigned long flags;
320 int r = 0;
321
322 DSSDBG("ENTER hdmi_display_enable\n");
323
324 mutex_lock(&hdmi.lock);
325
326 if (out->manager == NULL) {
327 DSSERR("failed to enable display: no output/manager\n");
328 r = -ENODEV;
329 goto err0;
330 }
331
332 r = hdmi_power_on_full(dssdev);
333 if (r) {
334 DSSERR("failed to power on device\n");
335 goto err0;
336 }
337
338 if (hdmi.audio_configured) {
339 r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config,
340 hdmi.cfg.timings.pixelclock);
341 if (r) {
342 DSSERR("Error restoring audio configuration: %d", r);
343 hdmi.audio_abort_cb(&hdmi.pdev->dev);
344 hdmi.audio_configured = false;
345 }
346 }
347
348 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
349 if (hdmi.audio_configured && hdmi.audio_playing)
350 hdmi_start_audio_stream(&hdmi);
351 hdmi.display_enabled = true;
352 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
353
354 mutex_unlock(&hdmi.lock);
355 return 0;
356
357err0:
358 mutex_unlock(&hdmi.lock);
359 return r;
360}
361
362static void hdmi_display_disable(struct omap_dss_device *dssdev)
363{
364 unsigned long flags;
365
366 DSSDBG("Enter hdmi_display_disable\n");
367
368 mutex_lock(&hdmi.lock);
369
370 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
371 hdmi_stop_audio_stream(&hdmi);
372 hdmi.display_enabled = false;
373 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
374
375 hdmi_power_off_full(dssdev);
376
377 mutex_unlock(&hdmi.lock);
378}
379
380static int hdmi_core_enable(struct omap_dss_device *dssdev)
381{
382 int r = 0;
383
384 DSSDBG("ENTER omapdss_hdmi_core_enable\n");
385
386 mutex_lock(&hdmi.lock);
387
388 r = hdmi_power_on_core(dssdev);
389 if (r) {
390 DSSERR("failed to power on device\n");
391 goto err0;
392 }
393
394 mutex_unlock(&hdmi.lock);
395 return 0;
396
397err0:
398 mutex_unlock(&hdmi.lock);
399 return r;
400}
401
402static void hdmi_core_disable(struct omap_dss_device *dssdev)
403{
404 DSSDBG("Enter omapdss_hdmi_core_disable\n");
405
406 mutex_lock(&hdmi.lock);
407
408 hdmi_power_off_core(dssdev);
409
410 mutex_unlock(&hdmi.lock);
411}
412
413static int hdmi_connect(struct omap_dss_device *dssdev,
414 struct omap_dss_device *dst)
415{
416 struct omap_overlay_manager *mgr;
417 int r;
418
419 r = hdmi_init_regulator();
420 if (r)
421 return r;
422
423 mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel);
424 if (!mgr)
425 return -ENODEV;
426
427 r = dss_mgr_connect(mgr, dssdev);
428 if (r)
429 return r;
430
431 r = omapdss_output_set_device(dssdev, dst);
432 if (r) {
433 DSSERR("failed to connect output to new device: %s\n",
434 dst->name);
435 dss_mgr_disconnect(mgr, dssdev);
436 return r;
437 }
438
439 return 0;
440}
441
442static void hdmi_disconnect(struct omap_dss_device *dssdev,
443 struct omap_dss_device *dst)
444{
445 WARN_ON(dst != dssdev->dst);
446
447 if (dst != dssdev->dst)
448 return;
449
450 omapdss_output_unset_device(dssdev);
451
452 if (dssdev->manager)
453 dss_mgr_disconnect(dssdev->manager, dssdev);
454}
455
456static int hdmi_read_edid(struct omap_dss_device *dssdev,
457 u8 *edid, int len)
458{
459 bool need_enable = !hdmi.core_enabled;
460 int r;
461
462 if (need_enable) {
463 r = hdmi_core_enable(dssdev);
464 if (r)
465 return r;
466 }
467
468 r = read_edid(edid, len);
469
470 if (need_enable)
471 hdmi_core_disable(dssdev);
472
473 return r;
474}
475
476static int hdmi_set_infoframe(struct omap_dss_device *dssdev,
477 const struct hdmi_avi_infoframe *avi)
478{
479 hdmi.cfg.infoframe = *avi;
480 return 0;
481}
482
483static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev,
484 bool hdmi_mode)
485{
486 hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI;
487 return 0;
488}
489
490static const struct omapdss_hdmi_ops hdmi_ops = {
491 .connect = hdmi_connect,
492 .disconnect = hdmi_disconnect,
493
494 .enable = hdmi_display_enable,
495 .disable = hdmi_display_disable,
496
497 .check_timings = hdmi_display_check_timing,
498 .set_timings = hdmi_display_set_timing,
499 .get_timings = hdmi_display_get_timings,
500
501 .read_edid = hdmi_read_edid,
502 .set_infoframe = hdmi_set_infoframe,
503 .set_hdmi_mode = hdmi_set_hdmi_mode,
504};
505
506static void hdmi_init_output(struct platform_device *pdev)
507{
508 struct omap_dss_device *out = &hdmi.output;
509
510 out->dev = &pdev->dev;
511 out->id = OMAP_DSS_OUTPUT_HDMI;
512 out->output_type = OMAP_DISPLAY_TYPE_HDMI;
513 out->name = "hdmi.0";
514 out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
515 out->ops.hdmi = &hdmi_ops;
516 out->owner = THIS_MODULE;
517
518 omapdss_register_output(out);
519}
520
521static void hdmi_uninit_output(struct platform_device *pdev)
522{
523 struct omap_dss_device *out = &hdmi.output;
524
525 omapdss_unregister_output(out);
526}
527
528static int hdmi_probe_of(struct platform_device *pdev)
529{
530 struct device_node *node = pdev->dev.of_node;
531 struct device_node *ep;
532 int r;
533
534 ep = omapdss_of_get_first_endpoint(node);
535 if (!ep)
536 return 0;
537
538 r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy);
539 if (r)
540 goto err;
541
542 of_node_put(ep);
543 return 0;
544
545err:
546 of_node_put(ep);
547 return r;
548}
549
550
551static int hdmi_audio_startup(struct device *dev,
552 void (*abort_cb)(struct device *dev))
553{
554 struct omap_hdmi *hd = dev_get_drvdata(dev);
555 int ret = 0;
556
557 mutex_lock(&hd->lock);
558
559 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
560 ret = -EPERM;
561 goto out;
562 }
563
564 hd->audio_abort_cb = abort_cb;
565
566out:
567 mutex_unlock(&hd->lock);
568
569 return ret;
570}
571
572static int hdmi_audio_shutdown(struct device *dev)
573{
574 struct omap_hdmi *hd = dev_get_drvdata(dev);
575
576 mutex_lock(&hd->lock);
577 hd->audio_abort_cb = NULL;
578 hd->audio_configured = false;
579 hd->audio_playing = false;
580 mutex_unlock(&hd->lock);
581
582 return 0;
583}
584
585static int hdmi_audio_start(struct device *dev)
586{
587 struct omap_hdmi *hd = dev_get_drvdata(dev);
588 unsigned long flags;
589
590 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
591
592 spin_lock_irqsave(&hd->audio_playing_lock, flags);
593
594 if (hd->display_enabled)
595 hdmi_start_audio_stream(hd);
596 hd->audio_playing = true;
597
598 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
599 return 0;
600}
601
602static void hdmi_audio_stop(struct device *dev)
603{
604 struct omap_hdmi *hd = dev_get_drvdata(dev);
605 unsigned long flags;
606
607 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
608
609 spin_lock_irqsave(&hd->audio_playing_lock, flags);
610
611 if (hd->display_enabled)
612 hdmi_stop_audio_stream(hd);
613 hd->audio_playing = false;
614
615 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
616}
617
618static int hdmi_audio_config(struct device *dev,
619 struct omap_dss_audio *dss_audio)
620{
621 struct omap_hdmi *hd = dev_get_drvdata(dev);
622 int ret;
623
624 mutex_lock(&hd->lock);
625
626 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
627 ret = -EPERM;
628 goto out;
629 }
630
631 ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
632 hd->cfg.timings.pixelclock);
633 if (!ret) {
634 hd->audio_configured = true;
635 hd->audio_config = *dss_audio;
636 }
637out:
638 mutex_unlock(&hd->lock);
639
640 return ret;
641}
642
643static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
644 .audio_startup = hdmi_audio_startup,
645 .audio_shutdown = hdmi_audio_shutdown,
646 .audio_start = hdmi_audio_start,
647 .audio_stop = hdmi_audio_stop,
648 .audio_config = hdmi_audio_config,
649};
650
651static int hdmi_audio_register(struct device *dev)
652{
653 struct omap_hdmi_audio_pdata pdata = {
654 .dev = dev,
655 .version = 4,
656 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),
657 .ops = &hdmi_audio_ops,
658 };
659
660 hdmi.audio_pdev = platform_device_register_data(
661 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
662 &pdata, sizeof(pdata));
663
664 return PTR_ERR_OR_ZERO(hdmi.audio_pdev);
665}
666
667
668static int hdmi4_bind(struct device *dev, struct device *master, void *data)
669{
670 struct platform_device *pdev = to_platform_device(dev);
671 int r;
672 int irq;
673
674 hdmi.pdev = pdev;
675 dev_set_drvdata(&pdev->dev, &hdmi);
676
677 mutex_init(&hdmi.lock);
678 spin_lock_init(&hdmi.audio_playing_lock);
679
680 if (pdev->dev.of_node) {
681 r = hdmi_probe_of(pdev);
682 if (r)
683 return r;
684 }
685
686 r = hdmi_wp_init(pdev, &hdmi.wp);
687 if (r)
688 return r;
689
690 r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp);
691 if (r)
692 return r;
693
694 r = hdmi_phy_init(pdev, &hdmi.phy);
695 if (r)
696 goto err;
697
698 r = hdmi4_core_init(pdev, &hdmi.core);
699 if (r)
700 goto err;
701
702 irq = platform_get_irq(pdev, 0);
703 if (irq < 0) {
704 DSSERR("platform_get_irq failed\n");
705 r = -ENODEV;
706 goto err;
707 }
708
709 r = devm_request_threaded_irq(&pdev->dev, irq,
710 NULL, hdmi_irq_handler,
711 IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp);
712 if (r) {
713 DSSERR("HDMI IRQ request failed\n");
714 goto err;
715 }
716
717 pm_runtime_enable(&pdev->dev);
718
719 hdmi_init_output(pdev);
720
721 r = hdmi_audio_register(&pdev->dev);
722 if (r) {
723 DSSERR("Registering HDMI audio failed\n");
724 hdmi_uninit_output(pdev);
725 pm_runtime_disable(&pdev->dev);
726 return r;
727 }
728
729 dss_debugfs_create_file("hdmi", hdmi_dump_regs);
730
731 return 0;
732err:
733 hdmi_pll_uninit(&hdmi.pll);
734 return r;
735}
736
737static void hdmi4_unbind(struct device *dev, struct device *master, void *data)
738{
739 struct platform_device *pdev = to_platform_device(dev);
740
741 if (hdmi.audio_pdev)
742 platform_device_unregister(hdmi.audio_pdev);
743
744 hdmi_uninit_output(pdev);
745
746 hdmi_pll_uninit(&hdmi.pll);
747
748 pm_runtime_disable(&pdev->dev);
749}
750
751static const struct component_ops hdmi4_component_ops = {
752 .bind = hdmi4_bind,
753 .unbind = hdmi4_unbind,
754};
755
756static int hdmi4_probe(struct platform_device *pdev)
757{
758 return component_add(&pdev->dev, &hdmi4_component_ops);
759}
760
761static int hdmi4_remove(struct platform_device *pdev)
762{
763 component_del(&pdev->dev, &hdmi4_component_ops);
764 return 0;
765}
766
767static int hdmi_runtime_suspend(struct device *dev)
768{
769 dispc_runtime_put();
770
771 return 0;
772}
773
774static int hdmi_runtime_resume(struct device *dev)
775{
776 int r;
777
778 r = dispc_runtime_get();
779 if (r < 0)
780 return r;
781
782 return 0;
783}
784
785static const struct dev_pm_ops hdmi_pm_ops = {
786 .runtime_suspend = hdmi_runtime_suspend,
787 .runtime_resume = hdmi_runtime_resume,
788};
789
790static const struct of_device_id hdmi_of_match[] = {
791 { .compatible = "ti,omap4-hdmi", },
792 {},
793};
794
795static struct platform_driver omapdss_hdmihw_driver = {
796 .probe = hdmi4_probe,
797 .remove = hdmi4_remove,
798 .driver = {
799 .name = "omapdss_hdmi",
800 .pm = &hdmi_pm_ops,
801 .of_match_table = hdmi_of_match,
802 .suppress_bind_attrs = true,
803 },
804};
805
806int __init hdmi4_init_platform_driver(void)
807{
808 return platform_driver_register(&omapdss_hdmihw_driver);
809}
810
811void hdmi4_uninit_platform_driver(void)
812{
813 platform_driver_unregister(&omapdss_hdmihw_driver);
814}
815
