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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 int r;
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 r = regulator_set_voltage(reg, 1800000, 1800000);
118 if (r) {
119 devm_regulator_put(reg);
120 DSSWARN("can't set the regulator voltage\n");
121 return r;
122 }
123
124 hdmi.vdda_reg = reg;
125
126 return 0;
127}
128
129static int hdmi_power_on_core(struct omap_dss_device *dssdev)
130{
131 int r;
132
133 r = regulator_enable(hdmi.vdda_reg);
134 if (r)
135 return r;
136
137 r = hdmi_runtime_get();
138 if (r)
139 goto err_runtime_get;
140
141
142 dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK);
143
144 hdmi.core_enabled = true;
145
146 return 0;
147
148err_runtime_get:
149 regulator_disable(hdmi.vdda_reg);
150
151 return r;
152}
153
154static void hdmi_power_off_core(struct omap_dss_device *dssdev)
155{
156 hdmi.core_enabled = false;
157
158 hdmi_runtime_put();
159 regulator_disable(hdmi.vdda_reg);
160}
161
162static int hdmi_power_on_full(struct omap_dss_device *dssdev)
163{
164 int r;
165 struct omap_video_timings *p;
166 struct omap_overlay_manager *mgr = hdmi.output.manager;
167 struct hdmi_wp_data *wp = &hdmi.wp;
168 struct dss_pll_clock_info hdmi_cinfo = { 0 };
169
170 r = hdmi_power_on_core(dssdev);
171 if (r)
172 return r;
173
174
175 hdmi_wp_clear_irqenable(wp, 0xffffffff);
176 hdmi_wp_set_irqstatus(wp, 0xffffffff);
177
178 p = &hdmi.cfg.timings;
179
180 DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res);
181
182 hdmi_pll_compute(&hdmi.pll, p->pixelclock, &hdmi_cinfo);
183
184 r = dss_pll_enable(&hdmi.pll.pll);
185 if (r) {
186 DSSERR("Failed to enable PLL\n");
187 goto err_pll_enable;
188 }
189
190 r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo);
191 if (r) {
192 DSSERR("Failed to configure PLL\n");
193 goto err_pll_cfg;
194 }
195
196 r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco,
197 hdmi_cinfo.clkout[0]);
198 if (r) {
199 DSSDBG("Failed to configure PHY\n");
200 goto err_phy_cfg;
201 }
202
203 r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
204 if (r)
205 goto err_phy_pwr;
206
207 hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg);
208
209
210 dispc_enable_gamma_table(0);
211
212
213 dss_mgr_set_timings(mgr, p);
214
215 r = hdmi_wp_video_start(&hdmi.wp);
216 if (r)
217 goto err_vid_enable;
218
219 r = dss_mgr_enable(mgr);
220 if (r)
221 goto err_mgr_enable;
222
223 hdmi_wp_set_irqenable(wp,
224 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);
225
226 return 0;
227
228err_mgr_enable:
229 hdmi_wp_video_stop(&hdmi.wp);
230err_vid_enable:
231 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
232err_phy_pwr:
233err_phy_cfg:
234err_pll_cfg:
235 dss_pll_disable(&hdmi.pll.pll);
236err_pll_enable:
237 hdmi_power_off_core(dssdev);
238 return -EIO;
239}
240
241static void hdmi_power_off_full(struct omap_dss_device *dssdev)
242{
243 struct omap_overlay_manager *mgr = hdmi.output.manager;
244
245 hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);
246
247 dss_mgr_disable(mgr);
248
249 hdmi_wp_video_stop(&hdmi.wp);
250
251 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
252
253 dss_pll_disable(&hdmi.pll.pll);
254
255 hdmi_power_off_core(dssdev);
256}
257
258static int hdmi_display_check_timing(struct omap_dss_device *dssdev,
259 struct omap_video_timings *timings)
260{
261 struct omap_dss_device *out = &hdmi.output;
262
263 if (!dispc_mgr_timings_ok(out->dispc_channel, timings))
264 return -EINVAL;
265
266 return 0;
267}
268
269static void hdmi_display_set_timing(struct omap_dss_device *dssdev,
270 struct omap_video_timings *timings)
271{
272 mutex_lock(&hdmi.lock);
273
274 hdmi.cfg.timings = *timings;
275
276 dispc_set_tv_pclk(timings->pixelclock);
277
278 mutex_unlock(&hdmi.lock);
279}
280
281static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
282 struct omap_video_timings *timings)
283{
284 *timings = hdmi.cfg.timings;
285}
286
287static void hdmi_dump_regs(struct seq_file *s)
288{
289 mutex_lock(&hdmi.lock);
290
291 if (hdmi_runtime_get()) {
292 mutex_unlock(&hdmi.lock);
293 return;
294 }
295
296 hdmi_wp_dump(&hdmi.wp, s);
297 hdmi_pll_dump(&hdmi.pll, s);
298 hdmi_phy_dump(&hdmi.phy, s);
299 hdmi4_core_dump(&hdmi.core, s);
300
301 hdmi_runtime_put();
302 mutex_unlock(&hdmi.lock);
303}
304
305static int read_edid(u8 *buf, int len)
306{
307 int r;
308
309 mutex_lock(&hdmi.lock);
310
311 r = hdmi_runtime_get();
312 BUG_ON(r);
313
314 r = hdmi4_read_edid(&hdmi.core, buf, len);
315
316 hdmi_runtime_put();
317 mutex_unlock(&hdmi.lock);
318
319 return r;
320}
321
322static void hdmi_start_audio_stream(struct omap_hdmi *hd)
323{
324 hdmi_wp_audio_enable(&hd->wp, true);
325 hdmi4_audio_start(&hd->core, &hd->wp);
326}
327
328static void hdmi_stop_audio_stream(struct omap_hdmi *hd)
329{
330 hdmi4_audio_stop(&hd->core, &hd->wp);
331 hdmi_wp_audio_enable(&hd->wp, false);
332}
333
334static int hdmi_display_enable(struct omap_dss_device *dssdev)
335{
336 struct omap_dss_device *out = &hdmi.output;
337 unsigned long flags;
338 int r = 0;
339
340 DSSDBG("ENTER hdmi_display_enable\n");
341
342 mutex_lock(&hdmi.lock);
343
344 if (out->manager == NULL) {
345 DSSERR("failed to enable display: no output/manager\n");
346 r = -ENODEV;
347 goto err0;
348 }
349
350 r = hdmi_power_on_full(dssdev);
351 if (r) {
352 DSSERR("failed to power on device\n");
353 goto err0;
354 }
355
356 if (hdmi.audio_configured) {
357 r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config,
358 hdmi.cfg.timings.pixelclock);
359 if (r) {
360 DSSERR("Error restoring audio configuration: %d", r);
361 hdmi.audio_abort_cb(&hdmi.pdev->dev);
362 hdmi.audio_configured = false;
363 }
364 }
365
366 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
367 if (hdmi.audio_configured && hdmi.audio_playing)
368 hdmi_start_audio_stream(&hdmi);
369 hdmi.display_enabled = true;
370 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
371
372 mutex_unlock(&hdmi.lock);
373 return 0;
374
375err0:
376 mutex_unlock(&hdmi.lock);
377 return r;
378}
379
380static void hdmi_display_disable(struct omap_dss_device *dssdev)
381{
382 unsigned long flags;
383
384 DSSDBG("Enter hdmi_display_disable\n");
385
386 mutex_lock(&hdmi.lock);
387
388 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
389 hdmi_stop_audio_stream(&hdmi);
390 hdmi.display_enabled = false;
391 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
392
393 hdmi_power_off_full(dssdev);
394
395 mutex_unlock(&hdmi.lock);
396}
397
398static int hdmi_core_enable(struct omap_dss_device *dssdev)
399{
400 int r = 0;
401
402 DSSDBG("ENTER omapdss_hdmi_core_enable\n");
403
404 mutex_lock(&hdmi.lock);
405
406 r = hdmi_power_on_core(dssdev);
407 if (r) {
408 DSSERR("failed to power on device\n");
409 goto err0;
410 }
411
412 mutex_unlock(&hdmi.lock);
413 return 0;
414
415err0:
416 mutex_unlock(&hdmi.lock);
417 return r;
418}
419
420static void hdmi_core_disable(struct omap_dss_device *dssdev)
421{
422 DSSDBG("Enter omapdss_hdmi_core_disable\n");
423
424 mutex_lock(&hdmi.lock);
425
426 hdmi_power_off_core(dssdev);
427
428 mutex_unlock(&hdmi.lock);
429}
430
431static int hdmi_connect(struct omap_dss_device *dssdev,
432 struct omap_dss_device *dst)
433{
434 struct omap_overlay_manager *mgr;
435 int r;
436
437 r = hdmi_init_regulator();
438 if (r)
439 return r;
440
441 mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel);
442 if (!mgr)
443 return -ENODEV;
444
445 r = dss_mgr_connect(mgr, dssdev);
446 if (r)
447 return r;
448
449 r = omapdss_output_set_device(dssdev, dst);
450 if (r) {
451 DSSERR("failed to connect output to new device: %s\n",
452 dst->name);
453 dss_mgr_disconnect(mgr, dssdev);
454 return r;
455 }
456
457 return 0;
458}
459
460static void hdmi_disconnect(struct omap_dss_device *dssdev,
461 struct omap_dss_device *dst)
462{
463 WARN_ON(dst != dssdev->dst);
464
465 if (dst != dssdev->dst)
466 return;
467
468 omapdss_output_unset_device(dssdev);
469
470 if (dssdev->manager)
471 dss_mgr_disconnect(dssdev->manager, dssdev);
472}
473
474static int hdmi_read_edid(struct omap_dss_device *dssdev,
475 u8 *edid, int len)
476{
477 bool need_enable;
478 int r;
479
480 need_enable = hdmi.core_enabled == false;
481
482 if (need_enable) {
483 r = hdmi_core_enable(dssdev);
484 if (r)
485 return r;
486 }
487
488 r = read_edid(edid, len);
489
490 if (need_enable)
491 hdmi_core_disable(dssdev);
492
493 return r;
494}
495
496static int hdmi_set_infoframe(struct omap_dss_device *dssdev,
497 const struct hdmi_avi_infoframe *avi)
498{
499 hdmi.cfg.infoframe = *avi;
500 return 0;
501}
502
503static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev,
504 bool hdmi_mode)
505{
506 hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI;
507 return 0;
508}
509
510static const struct omapdss_hdmi_ops hdmi_ops = {
511 .connect = hdmi_connect,
512 .disconnect = hdmi_disconnect,
513
514 .enable = hdmi_display_enable,
515 .disable = hdmi_display_disable,
516
517 .check_timings = hdmi_display_check_timing,
518 .set_timings = hdmi_display_set_timing,
519 .get_timings = hdmi_display_get_timings,
520
521 .read_edid = hdmi_read_edid,
522 .set_infoframe = hdmi_set_infoframe,
523 .set_hdmi_mode = hdmi_set_hdmi_mode,
524};
525
526static void hdmi_init_output(struct platform_device *pdev)
527{
528 struct omap_dss_device *out = &hdmi.output;
529
530 out->dev = &pdev->dev;
531 out->id = OMAP_DSS_OUTPUT_HDMI;
532 out->output_type = OMAP_DISPLAY_TYPE_HDMI;
533 out->name = "hdmi.0";
534 out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
535 out->ops.hdmi = &hdmi_ops;
536 out->owner = THIS_MODULE;
537
538 omapdss_register_output(out);
539}
540
541static void hdmi_uninit_output(struct platform_device *pdev)
542{
543 struct omap_dss_device *out = &hdmi.output;
544
545 omapdss_unregister_output(out);
546}
547
548static int hdmi_probe_of(struct platform_device *pdev)
549{
550 struct device_node *node = pdev->dev.of_node;
551 struct device_node *ep;
552 int r;
553
554 ep = omapdss_of_get_first_endpoint(node);
555 if (!ep)
556 return 0;
557
558 r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy);
559 if (r)
560 goto err;
561
562 of_node_put(ep);
563 return 0;
564
565err:
566 of_node_put(ep);
567 return r;
568}
569
570
571static int hdmi_audio_startup(struct device *dev,
572 void (*abort_cb)(struct device *dev))
573{
574 struct omap_hdmi *hd = dev_get_drvdata(dev);
575 int ret = 0;
576
577 mutex_lock(&hd->lock);
578
579 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
580 ret = -EPERM;
581 goto out;
582 }
583
584 hd->audio_abort_cb = abort_cb;
585
586out:
587 mutex_unlock(&hd->lock);
588
589 return ret;
590}
591
592static int hdmi_audio_shutdown(struct device *dev)
593{
594 struct omap_hdmi *hd = dev_get_drvdata(dev);
595
596 mutex_lock(&hd->lock);
597 hd->audio_abort_cb = NULL;
598 hd->audio_configured = false;
599 hd->audio_playing = false;
600 mutex_unlock(&hd->lock);
601
602 return 0;
603}
604
605static int hdmi_audio_start(struct device *dev)
606{
607 struct omap_hdmi *hd = dev_get_drvdata(dev);
608 unsigned long flags;
609
610 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
611
612 spin_lock_irqsave(&hd->audio_playing_lock, flags);
613
614 if (hd->display_enabled)
615 hdmi_start_audio_stream(hd);
616 hd->audio_playing = true;
617
618 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
619 return 0;
620}
621
622static void hdmi_audio_stop(struct device *dev)
623{
624 struct omap_hdmi *hd = dev_get_drvdata(dev);
625 unsigned long flags;
626
627 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
628
629 spin_lock_irqsave(&hd->audio_playing_lock, flags);
630
631 if (hd->display_enabled)
632 hdmi_stop_audio_stream(hd);
633 hd->audio_playing = false;
634
635 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
636}
637
638static int hdmi_audio_config(struct device *dev,
639 struct omap_dss_audio *dss_audio)
640{
641 struct omap_hdmi *hd = dev_get_drvdata(dev);
642 int ret;
643
644 mutex_lock(&hd->lock);
645
646 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
647 ret = -EPERM;
648 goto out;
649 }
650
651 ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
652 hd->cfg.timings.pixelclock);
653 if (!ret) {
654 hd->audio_configured = true;
655 hd->audio_config = *dss_audio;
656 }
657out:
658 mutex_unlock(&hd->lock);
659
660 return ret;
661}
662
663static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
664 .audio_startup = hdmi_audio_startup,
665 .audio_shutdown = hdmi_audio_shutdown,
666 .audio_start = hdmi_audio_start,
667 .audio_stop = hdmi_audio_stop,
668 .audio_config = hdmi_audio_config,
669};
670
671static int hdmi_audio_register(struct device *dev)
672{
673 struct omap_hdmi_audio_pdata pdata = {
674 .dev = dev,
675 .dss_version = omapdss_get_version(),
676 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),
677 .ops = &hdmi_audio_ops,
678 };
679
680 hdmi.audio_pdev = platform_device_register_data(
681 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
682 &pdata, sizeof(pdata));
683
684 if (IS_ERR(hdmi.audio_pdev))
685 return PTR_ERR(hdmi.audio_pdev);
686
687 return 0;
688}
689
690
691static int hdmi4_bind(struct device *dev, struct device *master, void *data)
692{
693 struct platform_device *pdev = to_platform_device(dev);
694 int r;
695 int irq;
696
697 hdmi.pdev = pdev;
698 dev_set_drvdata(&pdev->dev, &hdmi);
699
700 mutex_init(&hdmi.lock);
701 spin_lock_init(&hdmi.audio_playing_lock);
702
703 if (pdev->dev.of_node) {
704 r = hdmi_probe_of(pdev);
705 if (r)
706 return r;
707 }
708
709 r = hdmi_wp_init(pdev, &hdmi.wp);
710 if (r)
711 return r;
712
713 r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp);
714 if (r)
715 return r;
716
717 r = hdmi_phy_init(pdev, &hdmi.phy);
718 if (r)
719 goto err;
720
721 r = hdmi4_core_init(pdev, &hdmi.core);
722 if (r)
723 goto err;
724
725 irq = platform_get_irq(pdev, 0);
726 if (irq < 0) {
727 DSSERR("platform_get_irq failed\n");
728 r = -ENODEV;
729 goto err;
730 }
731
732 r = devm_request_threaded_irq(&pdev->dev, irq,
733 NULL, hdmi_irq_handler,
734 IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp);
735 if (r) {
736 DSSERR("HDMI IRQ request failed\n");
737 goto err;
738 }
739
740 pm_runtime_enable(&pdev->dev);
741
742 hdmi_init_output(pdev);
743
744 r = hdmi_audio_register(&pdev->dev);
745 if (r) {
746 DSSERR("Registering HDMI audio failed\n");
747 hdmi_uninit_output(pdev);
748 pm_runtime_disable(&pdev->dev);
749 return r;
750 }
751
752 dss_debugfs_create_file("hdmi", hdmi_dump_regs);
753
754 return 0;
755err:
756 hdmi_pll_uninit(&hdmi.pll);
757 return r;
758}
759
760static void hdmi4_unbind(struct device *dev, struct device *master, void *data)
761{
762 struct platform_device *pdev = to_platform_device(dev);
763
764 if (hdmi.audio_pdev)
765 platform_device_unregister(hdmi.audio_pdev);
766
767 hdmi_uninit_output(pdev);
768
769 hdmi_pll_uninit(&hdmi.pll);
770
771 pm_runtime_disable(&pdev->dev);
772}
773
774static const struct component_ops hdmi4_component_ops = {
775 .bind = hdmi4_bind,
776 .unbind = hdmi4_unbind,
777};
778
779static int hdmi4_probe(struct platform_device *pdev)
780{
781 return component_add(&pdev->dev, &hdmi4_component_ops);
782}
783
784static int hdmi4_remove(struct platform_device *pdev)
785{
786 component_del(&pdev->dev, &hdmi4_component_ops);
787 return 0;
788}
789
790static int hdmi_runtime_suspend(struct device *dev)
791{
792 dispc_runtime_put();
793
794 return 0;
795}
796
797static int hdmi_runtime_resume(struct device *dev)
798{
799 int r;
800
801 r = dispc_runtime_get();
802 if (r < 0)
803 return r;
804
805 return 0;
806}
807
808static const struct dev_pm_ops hdmi_pm_ops = {
809 .runtime_suspend = hdmi_runtime_suspend,
810 .runtime_resume = hdmi_runtime_resume,
811};
812
813static const struct of_device_id hdmi_of_match[] = {
814 { .compatible = "ti,omap4-hdmi", },
815 {},
816};
817
818static struct platform_driver omapdss_hdmihw_driver = {
819 .probe = hdmi4_probe,
820 .remove = hdmi4_remove,
821 .driver = {
822 .name = "omapdss_hdmi",
823 .pm = &hdmi_pm_ops,
824 .of_match_table = hdmi_of_match,
825 .suppress_bind_attrs = true,
826 },
827};
828
829int __init hdmi4_init_platform_driver(void)
830{
831 return platform_driver_register(&omapdss_hdmihw_driver);
832}
833
834void hdmi4_uninit_platform_driver(void)
835{
836 platform_driver_unregister(&omapdss_hdmihw_driver);
837}
838
