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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 <linux/of_graph.h>
38#include <sound/omap-hdmi-audio.h>
39
40#include "omapdss.h"
41#include "hdmi4_core.h"
42#include "dss.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 videomode *vm;
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 vm = &hdmi.cfg.vm;
173
174 DSSDBG("hdmi_power_on hactive= %d vactive = %d\n", vm->hactive,
175 vm->vactive);
176
177 pc = vm->pixelclock;
178 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK)
179 pc *= 2;
180
181
182 pc *= 10;
183
184 dss_pll_calc_b(&hdmi.pll.pll, clk_get_rate(hdmi.pll.pll.clkin),
185 pc, &hdmi_cinfo);
186
187 r = dss_pll_enable(&hdmi.pll.pll);
188 if (r) {
189 DSSERR("Failed to enable PLL\n");
190 goto err_pll_enable;
191 }
192
193 r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo);
194 if (r) {
195 DSSERR("Failed to configure PLL\n");
196 goto err_pll_cfg;
197 }
198
199 r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco,
200 hdmi_cinfo.clkout[0]);
201 if (r) {
202 DSSDBG("Failed to configure PHY\n");
203 goto err_phy_cfg;
204 }
205
206 r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
207 if (r)
208 goto err_phy_pwr;
209
210 hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg);
211
212
213 dss_mgr_set_timings(channel, vm);
214
215 r = dss_mgr_enable(channel);
216 if (r)
217 goto err_mgr_enable;
218
219 r = hdmi_wp_video_start(&hdmi.wp);
220 if (r)
221 goto err_vid_enable;
222
223 hdmi_wp_set_irqenable(wp,
224 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);
225
226 return 0;
227
228err_vid_enable:
229 dss_mgr_disable(channel);
230err_mgr_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 enum omap_channel channel = dssdev->dispc_channel;
244
245 hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);
246
247 hdmi_wp_video_stop(&hdmi.wp);
248
249 dss_mgr_disable(channel);
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 videomode *vm)
260{
261 if (!dispc_mgr_timings_ok(dssdev->dispc_channel, vm))
262 return -EINVAL;
263
264 return 0;
265}
266
267static void hdmi_display_set_timing(struct omap_dss_device *dssdev,
268 struct videomode *vm)
269{
270 mutex_lock(&hdmi.lock);
271
272 hdmi.cfg.vm = *vm;
273
274 dispc_set_tv_pclk(vm->pixelclock);
275
276 mutex_unlock(&hdmi.lock);
277}
278
279static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
280 struct videomode *vm)
281{
282 *vm = hdmi.cfg.vm;
283}
284
285static void hdmi_dump_regs(struct seq_file *s)
286{
287 mutex_lock(&hdmi.lock);
288
289 if (hdmi_runtime_get()) {
290 mutex_unlock(&hdmi.lock);
291 return;
292 }
293
294 hdmi_wp_dump(&hdmi.wp, s);
295 hdmi_pll_dump(&hdmi.pll, s);
296 hdmi_phy_dump(&hdmi.phy, s);
297 hdmi4_core_dump(&hdmi.core, s);
298
299 hdmi_runtime_put();
300 mutex_unlock(&hdmi.lock);
301}
302
303static int read_edid(u8 *buf, int len)
304{
305 int r;
306
307 mutex_lock(&hdmi.lock);
308
309 r = hdmi_runtime_get();
310 BUG_ON(r);
311
312 r = hdmi4_read_edid(&hdmi.core, buf, len);
313
314 hdmi_runtime_put();
315 mutex_unlock(&hdmi.lock);
316
317 return r;
318}
319
320static void hdmi_start_audio_stream(struct omap_hdmi *hd)
321{
322 hdmi_wp_audio_enable(&hd->wp, true);
323 hdmi4_audio_start(&hd->core, &hd->wp);
324}
325
326static void hdmi_stop_audio_stream(struct omap_hdmi *hd)
327{
328 hdmi4_audio_stop(&hd->core, &hd->wp);
329 hdmi_wp_audio_enable(&hd->wp, false);
330}
331
332static int hdmi_display_enable(struct omap_dss_device *dssdev)
333{
334 struct omap_dss_device *out = &hdmi.output;
335 unsigned long flags;
336 int r = 0;
337
338 DSSDBG("ENTER hdmi_display_enable\n");
339
340 mutex_lock(&hdmi.lock);
341
342 if (!out->dispc_channel_connected) {
343 DSSERR("failed to enable display: no output/manager\n");
344 r = -ENODEV;
345 goto err0;
346 }
347
348 r = hdmi_power_on_full(dssdev);
349 if (r) {
350 DSSERR("failed to power on device\n");
351 goto err0;
352 }
353
354 if (hdmi.audio_configured) {
355 r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config,
356 hdmi.cfg.vm.pixelclock);
357 if (r) {
358 DSSERR("Error restoring audio configuration: %d", r);
359 hdmi.audio_abort_cb(&hdmi.pdev->dev);
360 hdmi.audio_configured = false;
361 }
362 }
363
364 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
365 if (hdmi.audio_configured && hdmi.audio_playing)
366 hdmi_start_audio_stream(&hdmi);
367 hdmi.display_enabled = true;
368 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
369
370 mutex_unlock(&hdmi.lock);
371 return 0;
372
373err0:
374 mutex_unlock(&hdmi.lock);
375 return r;
376}
377
378static void hdmi_display_disable(struct omap_dss_device *dssdev)
379{
380 unsigned long flags;
381
382 DSSDBG("Enter hdmi_display_disable\n");
383
384 mutex_lock(&hdmi.lock);
385
386 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
387 hdmi_stop_audio_stream(&hdmi);
388 hdmi.display_enabled = false;
389 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
390
391 hdmi_power_off_full(dssdev);
392
393 mutex_unlock(&hdmi.lock);
394}
395
396static int hdmi_core_enable(struct omap_dss_device *dssdev)
397{
398 int r = 0;
399
400 DSSDBG("ENTER omapdss_hdmi_core_enable\n");
401
402 mutex_lock(&hdmi.lock);
403
404 r = hdmi_power_on_core(dssdev);
405 if (r) {
406 DSSERR("failed to power on device\n");
407 goto err0;
408 }
409
410 mutex_unlock(&hdmi.lock);
411 return 0;
412
413err0:
414 mutex_unlock(&hdmi.lock);
415 return r;
416}
417
418static void hdmi_core_disable(struct omap_dss_device *dssdev)
419{
420 DSSDBG("Enter omapdss_hdmi_core_disable\n");
421
422 mutex_lock(&hdmi.lock);
423
424 hdmi_power_off_core(dssdev);
425
426 mutex_unlock(&hdmi.lock);
427}
428
429static int hdmi_connect(struct omap_dss_device *dssdev,
430 struct omap_dss_device *dst)
431{
432 enum omap_channel channel = dssdev->dispc_channel;
433 int r;
434
435 r = hdmi_init_regulator();
436 if (r)
437 return r;
438
439 r = dss_mgr_connect(channel, dssdev);
440 if (r)
441 return r;
442
443 r = omapdss_output_set_device(dssdev, dst);
444 if (r) {
445 DSSERR("failed to connect output to new device: %s\n",
446 dst->name);
447 dss_mgr_disconnect(channel, dssdev);
448 return r;
449 }
450
451 return 0;
452}
453
454static void hdmi_disconnect(struct omap_dss_device *dssdev,
455 struct omap_dss_device *dst)
456{
457 enum omap_channel channel = dssdev->dispc_channel;
458
459 WARN_ON(dst != dssdev->dst);
460
461 if (dst != dssdev->dst)
462 return;
463
464 omapdss_output_unset_device(dssdev);
465
466 dss_mgr_disconnect(channel, dssdev);
467}
468
469static int hdmi_read_edid(struct omap_dss_device *dssdev,
470 u8 *edid, int len)
471{
472 bool need_enable;
473 int r;
474
475 need_enable = hdmi.core_enabled == false;
476
477 if (need_enable) {
478 r = hdmi_core_enable(dssdev);
479 if (r)
480 return r;
481 }
482
483 r = read_edid(edid, len);
484
485 if (need_enable)
486 hdmi_core_disable(dssdev);
487
488 return r;
489}
490
491static int hdmi_set_infoframe(struct omap_dss_device *dssdev,
492 const struct hdmi_avi_infoframe *avi)
493{
494 hdmi.cfg.infoframe = *avi;
495 return 0;
496}
497
498static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev,
499 bool hdmi_mode)
500{
501 hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI;
502 return 0;
503}
504
505static const struct omapdss_hdmi_ops hdmi_ops = {
506 .connect = hdmi_connect,
507 .disconnect = hdmi_disconnect,
508
509 .enable = hdmi_display_enable,
510 .disable = hdmi_display_disable,
511
512 .check_timings = hdmi_display_check_timing,
513 .set_timings = hdmi_display_set_timing,
514 .get_timings = hdmi_display_get_timings,
515
516 .read_edid = hdmi_read_edid,
517 .set_infoframe = hdmi_set_infoframe,
518 .set_hdmi_mode = hdmi_set_hdmi_mode,
519};
520
521static void hdmi_init_output(struct platform_device *pdev)
522{
523 struct omap_dss_device *out = &hdmi.output;
524
525 out->dev = &pdev->dev;
526 out->id = OMAP_DSS_OUTPUT_HDMI;
527 out->output_type = OMAP_DISPLAY_TYPE_HDMI;
528 out->name = "hdmi.0";
529 out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
530 out->ops.hdmi = &hdmi_ops;
531 out->owner = THIS_MODULE;
532
533 omapdss_register_output(out);
534}
535
536static void hdmi_uninit_output(struct platform_device *pdev)
537{
538 struct omap_dss_device *out = &hdmi.output;
539
540 omapdss_unregister_output(out);
541}
542
543static int hdmi_probe_of(struct platform_device *pdev)
544{
545 struct device_node *node = pdev->dev.of_node;
546 struct device_node *ep;
547 int r;
548
549 ep = of_graph_get_endpoint_by_regs(node, 0, 0);
550 if (!ep)
551 return 0;
552
553 r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy);
554 if (r)
555 goto err;
556
557 of_node_put(ep);
558 return 0;
559
560err:
561 of_node_put(ep);
562 return r;
563}
564
565
566static int hdmi_audio_startup(struct device *dev,
567 void (*abort_cb)(struct device *dev))
568{
569 struct omap_hdmi *hd = dev_get_drvdata(dev);
570 int ret = 0;
571
572 mutex_lock(&hd->lock);
573
574 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
575 ret = -EPERM;
576 goto out;
577 }
578
579 hd->audio_abort_cb = abort_cb;
580
581out:
582 mutex_unlock(&hd->lock);
583
584 return ret;
585}
586
587static int hdmi_audio_shutdown(struct device *dev)
588{
589 struct omap_hdmi *hd = dev_get_drvdata(dev);
590
591 mutex_lock(&hd->lock);
592 hd->audio_abort_cb = NULL;
593 hd->audio_configured = false;
594 hd->audio_playing = false;
595 mutex_unlock(&hd->lock);
596
597 return 0;
598}
599
600static int hdmi_audio_start(struct device *dev)
601{
602 struct omap_hdmi *hd = dev_get_drvdata(dev);
603 unsigned long flags;
604
605 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
606
607 spin_lock_irqsave(&hd->audio_playing_lock, flags);
608
609 if (hd->display_enabled)
610 hdmi_start_audio_stream(hd);
611 hd->audio_playing = true;
612
613 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
614 return 0;
615}
616
617static void hdmi_audio_stop(struct device *dev)
618{
619 struct omap_hdmi *hd = dev_get_drvdata(dev);
620 unsigned long flags;
621
622 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
623
624 spin_lock_irqsave(&hd->audio_playing_lock, flags);
625
626 if (hd->display_enabled)
627 hdmi_stop_audio_stream(hd);
628 hd->audio_playing = false;
629
630 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
631}
632
633static int hdmi_audio_config(struct device *dev,
634 struct omap_dss_audio *dss_audio)
635{
636 struct omap_hdmi *hd = dev_get_drvdata(dev);
637 int ret;
638
639 mutex_lock(&hd->lock);
640
641 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
642 ret = -EPERM;
643 goto out;
644 }
645
646 ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
647 hd->cfg.vm.pixelclock);
648 if (!ret) {
649 hd->audio_configured = true;
650 hd->audio_config = *dss_audio;
651 }
652out:
653 mutex_unlock(&hd->lock);
654
655 return ret;
656}
657
658static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
659 .audio_startup = hdmi_audio_startup,
660 .audio_shutdown = hdmi_audio_shutdown,
661 .audio_start = hdmi_audio_start,
662 .audio_stop = hdmi_audio_stop,
663 .audio_config = hdmi_audio_config,
664};
665
666static int hdmi_audio_register(struct device *dev)
667{
668 struct omap_hdmi_audio_pdata pdata = {
669 .dev = dev,
670 .version = 4,
671 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),
672 .ops = &hdmi_audio_ops,
673 };
674
675 hdmi.audio_pdev = platform_device_register_data(
676 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
677 &pdata, sizeof(pdata));
678
679 if (IS_ERR(hdmi.audio_pdev))
680 return PTR_ERR(hdmi.audio_pdev);
681
682 return 0;
683}
684
685
686static int hdmi4_bind(struct device *dev, struct device *master, void *data)
687{
688 struct platform_device *pdev = to_platform_device(dev);
689 int r;
690 int irq;
691
692 hdmi.pdev = pdev;
693 dev_set_drvdata(&pdev->dev, &hdmi);
694
695 mutex_init(&hdmi.lock);
696 spin_lock_init(&hdmi.audio_playing_lock);
697
698 r = hdmi_probe_of(pdev);
699 if (r)
700 return r;
701
702 r = hdmi_wp_init(pdev, &hdmi.wp, 4);
703 if (r)
704 return r;
705
706 r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp);
707 if (r)
708 return r;
709
710 r = hdmi_phy_init(pdev, &hdmi.phy, 4);
711 if (r)
712 goto err;
713
714 r = hdmi4_core_init(pdev, &hdmi.core);
715 if (r)
716 goto err;
717
718 irq = platform_get_irq(pdev, 0);
719 if (irq < 0) {
720 DSSERR("platform_get_irq failed\n");
721 r = -ENODEV;
722 goto err;
723 }
724
725 r = devm_request_threaded_irq(&pdev->dev, irq,
726 NULL, hdmi_irq_handler,
727 IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp);
728 if (r) {
729 DSSERR("HDMI IRQ request failed\n");
730 goto err;
731 }
732
733 pm_runtime_enable(&pdev->dev);
734
735 hdmi_init_output(pdev);
736
737 r = hdmi_audio_register(&pdev->dev);
738 if (r) {
739 DSSERR("Registering HDMI audio failed\n");
740 hdmi_uninit_output(pdev);
741 pm_runtime_disable(&pdev->dev);
742 return r;
743 }
744
745 dss_debugfs_create_file("hdmi", hdmi_dump_regs);
746
747 return 0;
748err:
749 hdmi_pll_uninit(&hdmi.pll);
750 return r;
751}
752
753static void hdmi4_unbind(struct device *dev, struct device *master, void *data)
754{
755 struct platform_device *pdev = to_platform_device(dev);
756
757 if (hdmi.audio_pdev)
758 platform_device_unregister(hdmi.audio_pdev);
759
760 hdmi_uninit_output(pdev);
761
762 hdmi_pll_uninit(&hdmi.pll);
763
764 pm_runtime_disable(&pdev->dev);
765}
766
767static const struct component_ops hdmi4_component_ops = {
768 .bind = hdmi4_bind,
769 .unbind = hdmi4_unbind,
770};
771
772static int hdmi4_probe(struct platform_device *pdev)
773{
774 return component_add(&pdev->dev, &hdmi4_component_ops);
775}
776
777static int hdmi4_remove(struct platform_device *pdev)
778{
779 component_del(&pdev->dev, &hdmi4_component_ops);
780 return 0;
781}
782
783static int hdmi_runtime_suspend(struct device *dev)
784{
785 dispc_runtime_put();
786
787 return 0;
788}
789
790static int hdmi_runtime_resume(struct device *dev)
791{
792 int r;
793
794 r = dispc_runtime_get();
795 if (r < 0)
796 return r;
797
798 return 0;
799}
800
801static const struct dev_pm_ops hdmi_pm_ops = {
802 .runtime_suspend = hdmi_runtime_suspend,
803 .runtime_resume = hdmi_runtime_resume,
804};
805
806static const struct of_device_id hdmi_of_match[] = {
807 { .compatible = "ti,omap4-hdmi", },
808 {},
809};
810
811static struct platform_driver omapdss_hdmihw_driver = {
812 .probe = hdmi4_probe,
813 .remove = hdmi4_remove,
814 .driver = {
815 .name = "omapdss_hdmi",
816 .pm = &hdmi_pm_ops,
817 .of_match_table = hdmi_of_match,
818 .suppress_bind_attrs = true,
819 },
820};
821
822int __init hdmi4_init_platform_driver(void)
823{
824 return platform_driver_register(&omapdss_hdmihw_driver);
825}
826
827void hdmi4_uninit_platform_driver(void)
828{
829 platform_driver_unregister(&omapdss_hdmihw_driver);
830}
831
