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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 <video/omapfb_dss.h>
37#include <sound/omap-hdmi-audio.h>
38
39#include "hdmi4_core.h"
40#include "dss.h"
41#include "dss_features.h"
42#include "hdmi.h"
43
44static struct omap_hdmi hdmi;
45
46static int hdmi_runtime_get(void)
47{
48 int r;
49
50 DSSDBG("hdmi_runtime_get\n");
51
52 r = pm_runtime_get_sync(&hdmi.pdev->dev);
53 WARN_ON(r < 0);
54 if (r < 0)
55 return r;
56
57 return 0;
58}
59
60static void hdmi_runtime_put(void)
61{
62 int r;
63
64 DSSDBG("hdmi_runtime_put\n");
65
66 r = pm_runtime_put_sync(&hdmi.pdev->dev);
67 WARN_ON(r < 0 && r != -ENOSYS);
68}
69
70static irqreturn_t hdmi_irq_handler(int irq, void *data)
71{
72 struct hdmi_wp_data *wp = data;
73 u32 irqstatus;
74
75 irqstatus = hdmi_wp_get_irqstatus(wp);
76 hdmi_wp_set_irqstatus(wp, irqstatus);
77
78 if ((irqstatus & HDMI_IRQ_LINK_CONNECT) &&
79 irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
80
81
82
83
84
85
86 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF);
87
88 hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT |
89 HDMI_IRQ_LINK_DISCONNECT);
90
91 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
92 } else if (irqstatus & HDMI_IRQ_LINK_CONNECT) {
93 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_TXON);
94 } else if (irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
95 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
96 }
97
98 return IRQ_HANDLED;
99}
100
101static int hdmi_init_regulator(void)
102{
103 struct regulator *reg;
104
105 if (hdmi.vdda_reg != NULL)
106 return 0;
107
108 reg = devm_regulator_get(&hdmi.pdev->dev, "vdda");
109
110 if (IS_ERR(reg)) {
111 if (PTR_ERR(reg) != -EPROBE_DEFER)
112 DSSERR("can't get VDDA regulator\n");
113 return PTR_ERR(reg);
114 }
115
116 hdmi.vdda_reg = reg;
117
118 return 0;
119}
120
121static int hdmi_power_on_core(struct omap_dss_device *dssdev)
122{
123 int r;
124
125 r = regulator_enable(hdmi.vdda_reg);
126 if (r)
127 return r;
128
129 r = hdmi_runtime_get();
130 if (r)
131 goto err_runtime_get;
132
133
134 dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK);
135
136 hdmi.core_enabled = true;
137
138 return 0;
139
140err_runtime_get:
141 regulator_disable(hdmi.vdda_reg);
142
143 return r;
144}
145
146static void hdmi_power_off_core(struct omap_dss_device *dssdev)
147{
148 hdmi.core_enabled = false;
149
150 hdmi_runtime_put();
151 regulator_disable(hdmi.vdda_reg);
152}
153
154static int hdmi_power_on_full(struct omap_dss_device *dssdev)
155{
156 int r;
157 struct omap_video_timings *p;
158 struct omap_overlay_manager *mgr = hdmi.output.manager;
159 struct hdmi_wp_data *wp = &hdmi.wp;
160 struct dss_pll_clock_info hdmi_cinfo = { 0 };
161
162 r = hdmi_power_on_core(dssdev);
163 if (r)
164 return r;
165
166
167 hdmi_wp_clear_irqenable(wp, 0xffffffff);
168 hdmi_wp_set_irqstatus(wp, 0xffffffff);
169
170 p = &hdmi.cfg.timings;
171
172 DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res);
173
174 hdmi_pll_compute(&hdmi.pll, p->pixelclock, &hdmi_cinfo);
175
176 r = dss_pll_enable(&hdmi.pll.pll);
177 if (r) {
178 DSSERR("Failed to enable PLL\n");
179 goto err_pll_enable;
180 }
181
182 r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo);
183 if (r) {
184 DSSERR("Failed to configure PLL\n");
185 goto err_pll_cfg;
186 }
187
188 r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco,
189 hdmi_cinfo.clkout[0]);
190 if (r) {
191 DSSDBG("Failed to configure PHY\n");
192 goto err_phy_cfg;
193 }
194
195 r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
196 if (r)
197 goto err_phy_pwr;
198
199 hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg);
200
201
202 dispc_enable_gamma_table(0);
203
204
205 dss_mgr_set_timings(mgr, p);
206
207 r = hdmi_wp_video_start(&hdmi.wp);
208 if (r)
209 goto err_vid_enable;
210
211 r = dss_mgr_enable(mgr);
212 if (r)
213 goto err_mgr_enable;
214
215 hdmi_wp_set_irqenable(wp,
216 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);
217
218 return 0;
219
220err_mgr_enable:
221 hdmi_wp_video_stop(&hdmi.wp);
222err_vid_enable:
223 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
224err_phy_pwr:
225err_phy_cfg:
226err_pll_cfg:
227 dss_pll_disable(&hdmi.pll.pll);
228err_pll_enable:
229 hdmi_power_off_core(dssdev);
230 return -EIO;
231}
232
233static void hdmi_power_off_full(struct omap_dss_device *dssdev)
234{
235 struct omap_overlay_manager *mgr = hdmi.output.manager;
236
237 hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);
238
239 dss_mgr_disable(mgr);
240
241 hdmi_wp_video_stop(&hdmi.wp);
242
243 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
244
245 dss_pll_disable(&hdmi.pll.pll);
246
247 hdmi_power_off_core(dssdev);
248}
249
250static int hdmi_display_check_timing(struct omap_dss_device *dssdev,
251 struct omap_video_timings *timings)
252{
253 struct omap_dss_device *out = &hdmi.output;
254
255 if (!dispc_mgr_timings_ok(out->dispc_channel, timings))
256 return -EINVAL;
257
258 return 0;
259}
260
261static void hdmi_display_set_timing(struct omap_dss_device *dssdev,
262 struct omap_video_timings *timings)
263{
264 mutex_lock(&hdmi.lock);
265
266 hdmi.cfg.timings = *timings;
267
268 dispc_set_tv_pclk(timings->pixelclock);
269
270 mutex_unlock(&hdmi.lock);
271}
272
273static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
274 struct omap_video_timings *timings)
275{
276 *timings = hdmi.cfg.timings;
277}
278
279static void hdmi_dump_regs(struct seq_file *s)
280{
281 mutex_lock(&hdmi.lock);
282
283 if (hdmi_runtime_get()) {
284 mutex_unlock(&hdmi.lock);
285 return;
286 }
287
288 hdmi_wp_dump(&hdmi.wp, s);
289 hdmi_pll_dump(&hdmi.pll, s);
290 hdmi_phy_dump(&hdmi.phy, s);
291 hdmi4_core_dump(&hdmi.core, s);
292
293 hdmi_runtime_put();
294 mutex_unlock(&hdmi.lock);
295}
296
297static int read_edid(u8 *buf, int len)
298{
299 int r;
300
301 mutex_lock(&hdmi.lock);
302
303 r = hdmi_runtime_get();
304 BUG_ON(r);
305
306 r = hdmi4_read_edid(&hdmi.core, buf, len);
307
308 hdmi_runtime_put();
309 mutex_unlock(&hdmi.lock);
310
311 return r;
312}
313
314static void hdmi_start_audio_stream(struct omap_hdmi *hd)
315{
316 hdmi_wp_audio_enable(&hd->wp, true);
317 hdmi4_audio_start(&hd->core, &hd->wp);
318}
319
320static void hdmi_stop_audio_stream(struct omap_hdmi *hd)
321{
322 hdmi4_audio_stop(&hd->core, &hd->wp);
323 hdmi_wp_audio_enable(&hd->wp, false);
324}
325
326static int hdmi_display_enable(struct omap_dss_device *dssdev)
327{
328 struct omap_dss_device *out = &hdmi.output;
329 unsigned long flags;
330 int r = 0;
331
332 DSSDBG("ENTER hdmi_display_enable\n");
333
334 mutex_lock(&hdmi.lock);
335
336 if (out->manager == NULL) {
337 DSSERR("failed to enable display: no output/manager\n");
338 r = -ENODEV;
339 goto err0;
340 }
341
342 r = hdmi_power_on_full(dssdev);
343 if (r) {
344 DSSERR("failed to power on device\n");
345 goto err0;
346 }
347
348 if (hdmi.audio_configured) {
349 r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config,
350 hdmi.cfg.timings.pixelclock);
351 if (r) {
352 DSSERR("Error restoring audio configuration: %d", r);
353 hdmi.audio_abort_cb(&hdmi.pdev->dev);
354 hdmi.audio_configured = false;
355 }
356 }
357
358 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
359 if (hdmi.audio_configured && hdmi.audio_playing)
360 hdmi_start_audio_stream(&hdmi);
361 hdmi.display_enabled = true;
362 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
363
364 mutex_unlock(&hdmi.lock);
365 return 0;
366
367err0:
368 mutex_unlock(&hdmi.lock);
369 return r;
370}
371
372static void hdmi_display_disable(struct omap_dss_device *dssdev)
373{
374 unsigned long flags;
375
376 DSSDBG("Enter hdmi_display_disable\n");
377
378 mutex_lock(&hdmi.lock);
379
380 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
381 hdmi_stop_audio_stream(&hdmi);
382 hdmi.display_enabled = false;
383 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
384
385 hdmi_power_off_full(dssdev);
386
387 mutex_unlock(&hdmi.lock);
388}
389
390static int hdmi_core_enable(struct omap_dss_device *dssdev)
391{
392 int r = 0;
393
394 DSSDBG("ENTER omapdss_hdmi_core_enable\n");
395
396 mutex_lock(&hdmi.lock);
397
398 r = hdmi_power_on_core(dssdev);
399 if (r) {
400 DSSERR("failed to power on device\n");
401 goto err0;
402 }
403
404 mutex_unlock(&hdmi.lock);
405 return 0;
406
407err0:
408 mutex_unlock(&hdmi.lock);
409 return r;
410}
411
412static void hdmi_core_disable(struct omap_dss_device *dssdev)
413{
414 DSSDBG("Enter omapdss_hdmi_core_disable\n");
415
416 mutex_lock(&hdmi.lock);
417
418 hdmi_power_off_core(dssdev);
419
420 mutex_unlock(&hdmi.lock);
421}
422
423static int hdmi_connect(struct omap_dss_device *dssdev,
424 struct omap_dss_device *dst)
425{
426 struct omap_overlay_manager *mgr;
427 int r;
428
429 r = hdmi_init_regulator();
430 if (r)
431 return r;
432
433 mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel);
434 if (!mgr)
435 return -ENODEV;
436
437 r = dss_mgr_connect(mgr, dssdev);
438 if (r)
439 return r;
440
441 r = omapdss_output_set_device(dssdev, dst);
442 if (r) {
443 DSSERR("failed to connect output to new device: %s\n",
444 dst->name);
445 dss_mgr_disconnect(mgr, dssdev);
446 return r;
447 }
448
449 return 0;
450}
451
452static void hdmi_disconnect(struct omap_dss_device *dssdev,
453 struct omap_dss_device *dst)
454{
455 WARN_ON(dst != dssdev->dst);
456
457 if (dst != dssdev->dst)
458 return;
459
460 omapdss_output_unset_device(dssdev);
461
462 if (dssdev->manager)
463 dss_mgr_disconnect(dssdev->manager, dssdev);
464}
465
466static int hdmi_read_edid(struct omap_dss_device *dssdev,
467 u8 *edid, int len)
468{
469 bool need_enable;
470 int r;
471
472 need_enable = hdmi.core_enabled == false;
473
474 if (need_enable) {
475 r = hdmi_core_enable(dssdev);
476 if (r)
477 return r;
478 }
479
480 r = read_edid(edid, len);
481
482 if (need_enable)
483 hdmi_core_disable(dssdev);
484
485 return r;
486}
487
488static int hdmi_set_infoframe(struct omap_dss_device *dssdev,
489 const struct hdmi_avi_infoframe *avi)
490{
491 hdmi.cfg.infoframe = *avi;
492 return 0;
493}
494
495static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev,
496 bool hdmi_mode)
497{
498 hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI;
499 return 0;
500}
501
502static const struct omapdss_hdmi_ops hdmi_ops = {
503 .connect = hdmi_connect,
504 .disconnect = hdmi_disconnect,
505
506 .enable = hdmi_display_enable,
507 .disable = hdmi_display_disable,
508
509 .check_timings = hdmi_display_check_timing,
510 .set_timings = hdmi_display_set_timing,
511 .get_timings = hdmi_display_get_timings,
512
513 .read_edid = hdmi_read_edid,
514 .set_infoframe = hdmi_set_infoframe,
515 .set_hdmi_mode = hdmi_set_hdmi_mode,
516};
517
518static void hdmi_init_output(struct platform_device *pdev)
519{
520 struct omap_dss_device *out = &hdmi.output;
521
522 out->dev = &pdev->dev;
523 out->id = OMAP_DSS_OUTPUT_HDMI;
524 out->output_type = OMAP_DISPLAY_TYPE_HDMI;
525 out->name = "hdmi.0";
526 out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
527 out->ops.hdmi = &hdmi_ops;
528 out->owner = THIS_MODULE;
529
530 omapdss_register_output(out);
531}
532
533static void hdmi_uninit_output(struct platform_device *pdev)
534{
535 struct omap_dss_device *out = &hdmi.output;
536
537 omapdss_unregister_output(out);
538}
539
540static int hdmi_probe_of(struct platform_device *pdev)
541{
542 struct device_node *node = pdev->dev.of_node;
543 struct device_node *ep;
544 int r;
545
546 ep = omapdss_of_get_first_endpoint(node);
547 if (!ep)
548 return 0;
549
550 r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy);
551 if (r)
552 goto err;
553
554 of_node_put(ep);
555 return 0;
556
557err:
558 of_node_put(ep);
559 return r;
560}
561
562
563static int hdmi_audio_startup(struct device *dev,
564 void (*abort_cb)(struct device *dev))
565{
566 struct omap_hdmi *hd = dev_get_drvdata(dev);
567 int ret = 0;
568
569 mutex_lock(&hd->lock);
570
571 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
572 ret = -EPERM;
573 goto out;
574 }
575
576 hd->audio_abort_cb = abort_cb;
577
578out:
579 mutex_unlock(&hd->lock);
580
581 return ret;
582}
583
584static int hdmi_audio_shutdown(struct device *dev)
585{
586 struct omap_hdmi *hd = dev_get_drvdata(dev);
587
588 mutex_lock(&hd->lock);
589 hd->audio_abort_cb = NULL;
590 hd->audio_configured = false;
591 hd->audio_playing = false;
592 mutex_unlock(&hd->lock);
593
594 return 0;
595}
596
597static int hdmi_audio_start(struct device *dev)
598{
599 struct omap_hdmi *hd = dev_get_drvdata(dev);
600 unsigned long flags;
601
602 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
603
604 spin_lock_irqsave(&hd->audio_playing_lock, flags);
605
606 if (hd->display_enabled)
607 hdmi_start_audio_stream(hd);
608 hd->audio_playing = true;
609
610 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
611 return 0;
612}
613
614static void hdmi_audio_stop(struct device *dev)
615{
616 struct omap_hdmi *hd = dev_get_drvdata(dev);
617 unsigned long flags;
618
619 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
620
621 spin_lock_irqsave(&hd->audio_playing_lock, flags);
622
623 if (hd->display_enabled)
624 hdmi_stop_audio_stream(hd);
625 hd->audio_playing = false;
626
627 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
628}
629
630static int hdmi_audio_config(struct device *dev,
631 struct omap_dss_audio *dss_audio)
632{
633 struct omap_hdmi *hd = dev_get_drvdata(dev);
634 int ret;
635
636 mutex_lock(&hd->lock);
637
638 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
639 ret = -EPERM;
640 goto out;
641 }
642
643 ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
644 hd->cfg.timings.pixelclock);
645 if (!ret) {
646 hd->audio_configured = true;
647 hd->audio_config = *dss_audio;
648 }
649out:
650 mutex_unlock(&hd->lock);
651
652 return ret;
653}
654
655static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
656 .audio_startup = hdmi_audio_startup,
657 .audio_shutdown = hdmi_audio_shutdown,
658 .audio_start = hdmi_audio_start,
659 .audio_stop = hdmi_audio_stop,
660 .audio_config = hdmi_audio_config,
661};
662
663static int hdmi_audio_register(struct device *dev)
664{
665 struct omap_hdmi_audio_pdata pdata = {
666 .dev = dev,
667 .version = 4,
668 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),
669 .ops = &hdmi_audio_ops,
670 };
671
672 hdmi.audio_pdev = platform_device_register_data(
673 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
674 &pdata, sizeof(pdata));
675
676 return PTR_ERR_OR_ZERO(hdmi.audio_pdev);
677}
678
679
680static int hdmi4_bind(struct device *dev, struct device *master, void *data)
681{
682 struct platform_device *pdev = to_platform_device(dev);
683 int r;
684 int irq;
685
686 hdmi.pdev = pdev;
687 dev_set_drvdata(&pdev->dev, &hdmi);
688
689 mutex_init(&hdmi.lock);
690 spin_lock_init(&hdmi.audio_playing_lock);
691
692 if (pdev->dev.of_node) {
693 r = hdmi_probe_of(pdev);
694 if (r)
695 return r;
696 }
697
698 r = hdmi_wp_init(pdev, &hdmi.wp);
699 if (r)
700 return r;
701
702 r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp);
703 if (r)
704 return r;
705
706 r = hdmi_phy_init(pdev, &hdmi.phy);
707 if (r)
708 goto err;
709
710 r = hdmi4_core_init(pdev, &hdmi.core);
711 if (r)
712 goto err;
713
714 irq = platform_get_irq(pdev, 0);
715 if (irq < 0) {
716 DSSERR("platform_get_irq failed\n");
717 r = -ENODEV;
718 goto err;
719 }
720
721 r = devm_request_threaded_irq(&pdev->dev, irq,
722 NULL, hdmi_irq_handler,
723 IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp);
724 if (r) {
725 DSSERR("HDMI IRQ request failed\n");
726 goto err;
727 }
728
729 pm_runtime_enable(&pdev->dev);
730
731 hdmi_init_output(pdev);
732
733 r = hdmi_audio_register(&pdev->dev);
734 if (r) {
735 DSSERR("Registering HDMI audio failed\n");
736 hdmi_uninit_output(pdev);
737 pm_runtime_disable(&pdev->dev);
738 return r;
739 }
740
741 dss_debugfs_create_file("hdmi", hdmi_dump_regs);
742
743 return 0;
744err:
745 hdmi_pll_uninit(&hdmi.pll);
746 return r;
747}
748
749static void hdmi4_unbind(struct device *dev, struct device *master, void *data)
750{
751 struct platform_device *pdev = to_platform_device(dev);
752
753 if (hdmi.audio_pdev)
754 platform_device_unregister(hdmi.audio_pdev);
755
756 hdmi_uninit_output(pdev);
757
758 hdmi_pll_uninit(&hdmi.pll);
759
760 pm_runtime_disable(&pdev->dev);
761}
762
763static const struct component_ops hdmi4_component_ops = {
764 .bind = hdmi4_bind,
765 .unbind = hdmi4_unbind,
766};
767
768static int hdmi4_probe(struct platform_device *pdev)
769{
770 return component_add(&pdev->dev, &hdmi4_component_ops);
771}
772
773static int hdmi4_remove(struct platform_device *pdev)
774{
775 component_del(&pdev->dev, &hdmi4_component_ops);
776 return 0;
777}
778
779static int hdmi_runtime_suspend(struct device *dev)
780{
781 dispc_runtime_put();
782
783 return 0;
784}
785
786static int hdmi_runtime_resume(struct device *dev)
787{
788 int r;
789
790 r = dispc_runtime_get();
791 if (r < 0)
792 return r;
793
794 return 0;
795}
796
797static const struct dev_pm_ops hdmi_pm_ops = {
798 .runtime_suspend = hdmi_runtime_suspend,
799 .runtime_resume = hdmi_runtime_resume,
800};
801
802static const struct of_device_id hdmi_of_match[] = {
803 { .compatible = "ti,omap4-hdmi", },
804 {},
805};
806
807static struct platform_driver omapdss_hdmihw_driver = {
808 .probe = hdmi4_probe,
809 .remove = hdmi4_remove,
810 .driver = {
811 .name = "omapdss_hdmi",
812 .pm = &hdmi_pm_ops,
813 .of_match_table = hdmi_of_match,
814 .suppress_bind_attrs = true,
815 },
816};
817
818int __init hdmi4_init_platform_driver(void)
819{
820 return platform_driver_register(&omapdss_hdmihw_driver);
821}
822
823void hdmi4_uninit_platform_driver(void)
824{
825 platform_driver_unregister(&omapdss_hdmihw_driver);
826}
827
