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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 WARN_ON(r < 0);
43 if (r < 0)
44 return r;
45
46 return 0;
47}
48
49static void hdmi_runtime_put(void)
50{
51 int r;
52
53 DSSDBG("hdmi_runtime_put\n");
54
55 r = pm_runtime_put_sync(&hdmi.pdev->dev);
56 WARN_ON(r < 0 && r != -ENOSYS);
57}
58
59static irqreturn_t hdmi_irq_handler(int irq, void *data)
60{
61 struct hdmi_wp_data *wp = data;
62 u32 irqstatus;
63
64 irqstatus = hdmi_wp_get_irqstatus(wp);
65 hdmi_wp_set_irqstatus(wp, irqstatus);
66
67 if ((irqstatus & HDMI_IRQ_LINK_CONNECT) &&
68 irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
69
70
71
72
73
74
75 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF);
76
77 hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT |
78 HDMI_IRQ_LINK_DISCONNECT);
79
80 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
81 } else if (irqstatus & HDMI_IRQ_LINK_CONNECT) {
82 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_TXON);
83 } else if (irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
84 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
85 }
86
87 return IRQ_HANDLED;
88}
89
90static int hdmi_init_regulator(void)
91{
92 struct regulator *reg;
93
94 if (hdmi.vdda_reg != NULL)
95 return 0;
96
97 reg = devm_regulator_get(&hdmi.pdev->dev, "vdda");
98
99 if (IS_ERR(reg)) {
100 if (PTR_ERR(reg) != -EPROBE_DEFER)
101 DSSERR("can't get VDDA regulator\n");
102 return PTR_ERR(reg);
103 }
104
105 hdmi.vdda_reg = reg;
106
107 return 0;
108}
109
110static int hdmi_power_on_core(struct omap_dss_device *dssdev)
111{
112 int r;
113
114 r = regulator_enable(hdmi.vdda_reg);
115 if (r)
116 return r;
117
118 r = hdmi_runtime_get();
119 if (r)
120 goto err_runtime_get;
121
122
123 dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK);
124
125 hdmi.core_enabled = true;
126
127 return 0;
128
129err_runtime_get:
130 regulator_disable(hdmi.vdda_reg);
131
132 return r;
133}
134
135static void hdmi_power_off_core(struct omap_dss_device *dssdev)
136{
137 hdmi.core_enabled = false;
138
139 hdmi_runtime_put();
140 regulator_disable(hdmi.vdda_reg);
141}
142
143static int hdmi_power_on_full(struct omap_dss_device *dssdev)
144{
145 int r;
146 struct omap_video_timings *p;
147 struct omap_overlay_manager *mgr = hdmi.output.manager;
148 struct hdmi_wp_data *wp = &hdmi.wp;
149 struct dss_pll_clock_info hdmi_cinfo = { 0 };
150
151 r = hdmi_power_on_core(dssdev);
152 if (r)
153 return r;
154
155
156 hdmi_wp_clear_irqenable(wp, 0xffffffff);
157 hdmi_wp_set_irqstatus(wp, 0xffffffff);
158
159 p = &hdmi.cfg.timings;
160
161 DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res);
162
163 hdmi_pll_compute(&hdmi.pll, p->pixelclock, &hdmi_cinfo);
164
165 r = dss_pll_enable(&hdmi.pll.pll);
166 if (r) {
167 DSSERR("Failed to enable PLL\n");
168 goto err_pll_enable;
169 }
170
171 r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo);
172 if (r) {
173 DSSERR("Failed to configure PLL\n");
174 goto err_pll_cfg;
175 }
176
177 r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco,
178 hdmi_cinfo.clkout[0]);
179 if (r) {
180 DSSDBG("Failed to configure PHY\n");
181 goto err_phy_cfg;
182 }
183
184 r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
185 if (r)
186 goto err_phy_pwr;
187
188 hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg);
189
190
191 dispc_enable_gamma_table(0);
192
193
194 dss_mgr_set_timings(mgr, p);
195
196 r = hdmi_wp_video_start(&hdmi.wp);
197 if (r)
198 goto err_vid_enable;
199
200 r = dss_mgr_enable(mgr);
201 if (r)
202 goto err_mgr_enable;
203
204 hdmi_wp_set_irqenable(wp,
205 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);
206
207 return 0;
208
209err_mgr_enable:
210 hdmi_wp_video_stop(&hdmi.wp);
211err_vid_enable:
212 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
213err_phy_pwr:
214err_phy_cfg:
215err_pll_cfg:
216 dss_pll_disable(&hdmi.pll.pll);
217err_pll_enable:
218 hdmi_power_off_core(dssdev);
219 return -EIO;
220}
221
222static void hdmi_power_off_full(struct omap_dss_device *dssdev)
223{
224 struct omap_overlay_manager *mgr = hdmi.output.manager;
225
226 hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);
227
228 dss_mgr_disable(mgr);
229
230 hdmi_wp_video_stop(&hdmi.wp);
231
232 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
233
234 dss_pll_disable(&hdmi.pll.pll);
235
236 hdmi_power_off_core(dssdev);
237}
238
239static int hdmi_display_check_timing(struct omap_dss_device *dssdev,
240 struct omap_video_timings *timings)
241{
242 struct omap_dss_device *out = &hdmi.output;
243
244 if (!dispc_mgr_timings_ok(out->dispc_channel, timings))
245 return -EINVAL;
246
247 return 0;
248}
249
250static void hdmi_display_set_timing(struct omap_dss_device *dssdev,
251 struct omap_video_timings *timings)
252{
253 mutex_lock(&hdmi.lock);
254
255 hdmi.cfg.timings = *timings;
256
257 dispc_set_tv_pclk(timings->pixelclock);
258
259 mutex_unlock(&hdmi.lock);
260}
261
262static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
263 struct omap_video_timings *timings)
264{
265 *timings = hdmi.cfg.timings;
266}
267
268static void hdmi_dump_regs(struct seq_file *s)
269{
270 mutex_lock(&hdmi.lock);
271
272 if (hdmi_runtime_get()) {
273 mutex_unlock(&hdmi.lock);
274 return;
275 }
276
277 hdmi_wp_dump(&hdmi.wp, s);
278 hdmi_pll_dump(&hdmi.pll, s);
279 hdmi_phy_dump(&hdmi.phy, s);
280 hdmi4_core_dump(&hdmi.core, s);
281
282 hdmi_runtime_put();
283 mutex_unlock(&hdmi.lock);
284}
285
286static int read_edid(u8 *buf, int len)
287{
288 int r;
289
290 mutex_lock(&hdmi.lock);
291
292 r = hdmi_runtime_get();
293 BUG_ON(r);
294
295 r = hdmi4_read_edid(&hdmi.core, buf, len);
296
297 hdmi_runtime_put();
298 mutex_unlock(&hdmi.lock);
299
300 return r;
301}
302
303static void hdmi_start_audio_stream(struct omap_hdmi *hd)
304{
305 hdmi_wp_audio_enable(&hd->wp, true);
306 hdmi4_audio_start(&hd->core, &hd->wp);
307}
308
309static void hdmi_stop_audio_stream(struct omap_hdmi *hd)
310{
311 hdmi4_audio_stop(&hd->core, &hd->wp);
312 hdmi_wp_audio_enable(&hd->wp, false);
313}
314
315static int hdmi_display_enable(struct omap_dss_device *dssdev)
316{
317 struct omap_dss_device *out = &hdmi.output;
318 unsigned long flags;
319 int r = 0;
320
321 DSSDBG("ENTER hdmi_display_enable\n");
322
323 mutex_lock(&hdmi.lock);
324
325 if (out->manager == NULL) {
326 DSSERR("failed to enable display: no output/manager\n");
327 r = -ENODEV;
328 goto err0;
329 }
330
331 r = hdmi_power_on_full(dssdev);
332 if (r) {
333 DSSERR("failed to power on device\n");
334 goto err0;
335 }
336
337 if (hdmi.audio_configured) {
338 r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config,
339 hdmi.cfg.timings.pixelclock);
340 if (r) {
341 DSSERR("Error restoring audio configuration: %d", r);
342 hdmi.audio_abort_cb(&hdmi.pdev->dev);
343 hdmi.audio_configured = false;
344 }
345 }
346
347 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
348 if (hdmi.audio_configured && hdmi.audio_playing)
349 hdmi_start_audio_stream(&hdmi);
350 hdmi.display_enabled = true;
351 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
352
353 mutex_unlock(&hdmi.lock);
354 return 0;
355
356err0:
357 mutex_unlock(&hdmi.lock);
358 return r;
359}
360
361static void hdmi_display_disable(struct omap_dss_device *dssdev)
362{
363 unsigned long flags;
364
365 DSSDBG("Enter hdmi_display_disable\n");
366
367 mutex_lock(&hdmi.lock);
368
369 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
370 hdmi_stop_audio_stream(&hdmi);
371 hdmi.display_enabled = false;
372 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
373
374 hdmi_power_off_full(dssdev);
375
376 mutex_unlock(&hdmi.lock);
377}
378
379static int hdmi_core_enable(struct omap_dss_device *dssdev)
380{
381 int r = 0;
382
383 DSSDBG("ENTER omapdss_hdmi_core_enable\n");
384
385 mutex_lock(&hdmi.lock);
386
387 r = hdmi_power_on_core(dssdev);
388 if (r) {
389 DSSERR("failed to power on device\n");
390 goto err0;
391 }
392
393 mutex_unlock(&hdmi.lock);
394 return 0;
395
396err0:
397 mutex_unlock(&hdmi.lock);
398 return r;
399}
400
401static void hdmi_core_disable(struct omap_dss_device *dssdev)
402{
403 DSSDBG("Enter omapdss_hdmi_core_disable\n");
404
405 mutex_lock(&hdmi.lock);
406
407 hdmi_power_off_core(dssdev);
408
409 mutex_unlock(&hdmi.lock);
410}
411
412static int hdmi_connect(struct omap_dss_device *dssdev,
413 struct omap_dss_device *dst)
414{
415 struct omap_overlay_manager *mgr;
416 int r;
417
418 r = hdmi_init_regulator();
419 if (r)
420 return r;
421
422 mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel);
423 if (!mgr)
424 return -ENODEV;
425
426 r = dss_mgr_connect(mgr, dssdev);
427 if (r)
428 return r;
429
430 r = omapdss_output_set_device(dssdev, dst);
431 if (r) {
432 DSSERR("failed to connect output to new device: %s\n",
433 dst->name);
434 dss_mgr_disconnect(mgr, dssdev);
435 return r;
436 }
437
438 return 0;
439}
440
441static void hdmi_disconnect(struct omap_dss_device *dssdev,
442 struct omap_dss_device *dst)
443{
444 WARN_ON(dst != dssdev->dst);
445
446 if (dst != dssdev->dst)
447 return;
448
449 omapdss_output_unset_device(dssdev);
450
451 if (dssdev->manager)
452 dss_mgr_disconnect(dssdev->manager, dssdev);
453}
454
455static int hdmi_read_edid(struct omap_dss_device *dssdev,
456 u8 *edid, int len)
457{
458 bool need_enable;
459 int r;
460
461 need_enable = hdmi.core_enabled == false;
462
463 if (need_enable) {
464 r = hdmi_core_enable(dssdev);
465 if (r)
466 return r;
467 }
468
469 r = read_edid(edid, len);
470
471 if (need_enable)
472 hdmi_core_disable(dssdev);
473
474 return r;
475}
476
477static int hdmi_set_infoframe(struct omap_dss_device *dssdev,
478 const struct hdmi_avi_infoframe *avi)
479{
480 hdmi.cfg.infoframe = *avi;
481 return 0;
482}
483
484static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev,
485 bool hdmi_mode)
486{
487 hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI;
488 return 0;
489}
490
491static const struct omapdss_hdmi_ops hdmi_ops = {
492 .connect = hdmi_connect,
493 .disconnect = hdmi_disconnect,
494
495 .enable = hdmi_display_enable,
496 .disable = hdmi_display_disable,
497
498 .check_timings = hdmi_display_check_timing,
499 .set_timings = hdmi_display_set_timing,
500 .get_timings = hdmi_display_get_timings,
501
502 .read_edid = hdmi_read_edid,
503 .set_infoframe = hdmi_set_infoframe,
504 .set_hdmi_mode = hdmi_set_hdmi_mode,
505};
506
507static void hdmi_init_output(struct platform_device *pdev)
508{
509 struct omap_dss_device *out = &hdmi.output;
510
511 out->dev = &pdev->dev;
512 out->id = OMAP_DSS_OUTPUT_HDMI;
513 out->output_type = OMAP_DISPLAY_TYPE_HDMI;
514 out->name = "hdmi.0";
515 out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
516 out->ops.hdmi = &hdmi_ops;
517 out->owner = THIS_MODULE;
518
519 omapdss_register_output(out);
520}
521
522static void hdmi_uninit_output(struct platform_device *pdev)
523{
524 struct omap_dss_device *out = &hdmi.output;
525
526 omapdss_unregister_output(out);
527}
528
529static int hdmi_probe_of(struct platform_device *pdev)
530{
531 struct device_node *node = pdev->dev.of_node;
532 struct device_node *ep;
533 int r;
534
535 ep = omapdss_of_get_first_endpoint(node);
536 if (!ep)
537 return 0;
538
539 r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy);
540 if (r)
541 goto err;
542
543 of_node_put(ep);
544 return 0;
545
546err:
547 of_node_put(ep);
548 return r;
549}
550
551
552static int hdmi_audio_startup(struct device *dev,
553 void (*abort_cb)(struct device *dev))
554{
555 struct omap_hdmi *hd = dev_get_drvdata(dev);
556 int ret = 0;
557
558 mutex_lock(&hd->lock);
559
560 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
561 ret = -EPERM;
562 goto out;
563 }
564
565 hd->audio_abort_cb = abort_cb;
566
567out:
568 mutex_unlock(&hd->lock);
569
570 return ret;
571}
572
573static int hdmi_audio_shutdown(struct device *dev)
574{
575 struct omap_hdmi *hd = dev_get_drvdata(dev);
576
577 mutex_lock(&hd->lock);
578 hd->audio_abort_cb = NULL;
579 hd->audio_configured = false;
580 hd->audio_playing = false;
581 mutex_unlock(&hd->lock);
582
583 return 0;
584}
585
586static int hdmi_audio_start(struct device *dev)
587{
588 struct omap_hdmi *hd = dev_get_drvdata(dev);
589 unsigned long flags;
590
591 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
592
593 spin_lock_irqsave(&hd->audio_playing_lock, flags);
594
595 if (hd->display_enabled)
596 hdmi_start_audio_stream(hd);
597 hd->audio_playing = true;
598
599 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
600 return 0;
601}
602
603static void hdmi_audio_stop(struct device *dev)
604{
605 struct omap_hdmi *hd = dev_get_drvdata(dev);
606 unsigned long flags;
607
608 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
609
610 spin_lock_irqsave(&hd->audio_playing_lock, flags);
611
612 if (hd->display_enabled)
613 hdmi_stop_audio_stream(hd);
614 hd->audio_playing = false;
615
616 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
617}
618
619static int hdmi_audio_config(struct device *dev,
620 struct omap_dss_audio *dss_audio)
621{
622 struct omap_hdmi *hd = dev_get_drvdata(dev);
623 int ret;
624
625 mutex_lock(&hd->lock);
626
627 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
628 ret = -EPERM;
629 goto out;
630 }
631
632 ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
633 hd->cfg.timings.pixelclock);
634 if (!ret) {
635 hd->audio_configured = true;
636 hd->audio_config = *dss_audio;
637 }
638out:
639 mutex_unlock(&hd->lock);
640
641 return ret;
642}
643
644static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
645 .audio_startup = hdmi_audio_startup,
646 .audio_shutdown = hdmi_audio_shutdown,
647 .audio_start = hdmi_audio_start,
648 .audio_stop = hdmi_audio_stop,
649 .audio_config = hdmi_audio_config,
650};
651
652static int hdmi_audio_register(struct device *dev)
653{
654 struct omap_hdmi_audio_pdata pdata = {
655 .dev = dev,
656 .version = 4,
657 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),
658 .ops = &hdmi_audio_ops,
659 };
660
661 hdmi.audio_pdev = platform_device_register_data(
662 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
663 &pdata, sizeof(pdata));
664
665 return PTR_ERR_OR_ZERO(hdmi.audio_pdev);
666}
667
668
669static int hdmi4_bind(struct device *dev, struct device *master, void *data)
670{
671 struct platform_device *pdev = to_platform_device(dev);
672 int r;
673 int irq;
674
675 hdmi.pdev = pdev;
676 dev_set_drvdata(&pdev->dev, &hdmi);
677
678 mutex_init(&hdmi.lock);
679 spin_lock_init(&hdmi.audio_playing_lock);
680
681 if (pdev->dev.of_node) {
682 r = hdmi_probe_of(pdev);
683 if (r)
684 return r;
685 }
686
687 r = hdmi_wp_init(pdev, &hdmi.wp);
688 if (r)
689 return r;
690
691 r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp);
692 if (r)
693 return r;
694
695 r = hdmi_phy_init(pdev, &hdmi.phy);
696 if (r)
697 goto err;
698
699 r = hdmi4_core_init(pdev, &hdmi.core);
700 if (r)
701 goto err;
702
703 irq = platform_get_irq(pdev, 0);
704 if (irq < 0) {
705 DSSERR("platform_get_irq failed\n");
706 r = -ENODEV;
707 goto err;
708 }
709
710 r = devm_request_threaded_irq(&pdev->dev, irq,
711 NULL, hdmi_irq_handler,
712 IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp);
713 if (r) {
714 DSSERR("HDMI IRQ request failed\n");
715 goto err;
716 }
717
718 pm_runtime_enable(&pdev->dev);
719
720 hdmi_init_output(pdev);
721
722 r = hdmi_audio_register(&pdev->dev);
723 if (r) {
724 DSSERR("Registering HDMI audio failed\n");
725 hdmi_uninit_output(pdev);
726 pm_runtime_disable(&pdev->dev);
727 return r;
728 }
729
730 dss_debugfs_create_file("hdmi", hdmi_dump_regs);
731
732 return 0;
733err:
734 hdmi_pll_uninit(&hdmi.pll);
735 return r;
736}
737
738static void hdmi4_unbind(struct device *dev, struct device *master, void *data)
739{
740 struct platform_device *pdev = to_platform_device(dev);
741
742 if (hdmi.audio_pdev)
743 platform_device_unregister(hdmi.audio_pdev);
744
745 hdmi_uninit_output(pdev);
746
747 hdmi_pll_uninit(&hdmi.pll);
748
749 pm_runtime_disable(&pdev->dev);
750}
751
752static const struct component_ops hdmi4_component_ops = {
753 .bind = hdmi4_bind,
754 .unbind = hdmi4_unbind,
755};
756
757static int hdmi4_probe(struct platform_device *pdev)
758{
759 return component_add(&pdev->dev, &hdmi4_component_ops);
760}
761
762static int hdmi4_remove(struct platform_device *pdev)
763{
764 component_del(&pdev->dev, &hdmi4_component_ops);
765 return 0;
766}
767
768static int hdmi_runtime_suspend(struct device *dev)
769{
770 dispc_runtime_put();
771
772 return 0;
773}
774
775static int hdmi_runtime_resume(struct device *dev)
776{
777 int r;
778
779 r = dispc_runtime_get();
780 if (r < 0)
781 return r;
782
783 return 0;
784}
785
786static const struct dev_pm_ops hdmi_pm_ops = {
787 .runtime_suspend = hdmi_runtime_suspend,
788 .runtime_resume = hdmi_runtime_resume,
789};
790
791static const struct of_device_id hdmi_of_match[] = {
792 { .compatible = "ti,omap4-hdmi", },
793 {},
794};
795
796static struct platform_driver omapdss_hdmihw_driver = {
797 .probe = hdmi4_probe,
798 .remove = hdmi4_remove,
799 .driver = {
800 .name = "omapdss_hdmi",
801 .pm = &hdmi_pm_ops,
802 .of_match_table = hdmi_of_match,
803 .suppress_bind_attrs = true,
804 },
805};
806
807int __init hdmi4_init_platform_driver(void)
808{
809 return platform_driver_register(&omapdss_hdmihw_driver);
810}
811
812void hdmi4_uninit_platform_driver(void)
813{
814 platform_driver_unregister(&omapdss_hdmihw_driver);
815}
816
