1 /*
2  * HDMI interface DSS driver for TI's OMAP4 family of SoCs.
3  * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com/
4  * Authors: Yong Zhi
5  *	Mythri pk <mythripk@ti.com>
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License version 2 as published by
9  * the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
14  * more details.
15  *
16  * You should have received a copy of the GNU General Public License along with
17  * this program.  If not, see <http://www.gnu.org/licenses/>.
18  */
19 
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/omapdss.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 
44 static struct omap_hdmi hdmi;
45 
46 static 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 
60 static 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 
70 static 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 		 * If we get both connect and disconnect interrupts at the same
82 		 * time, turn off the PHY, clear interrupts, and restart, which
83 		 * raises connect interrupt if a cable is connected, or nothing
84 		 * if cable is not connected.
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 
101 static 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 
129 static 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 	/* Make selection of HDMI in DSS */
142 	dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK);
143 
144 	hdmi.core_enabled = true;
145 
146 	return 0;
147 
148 err_runtime_get:
149 	regulator_disable(hdmi.vdda_reg);
150 
151 	return r;
152 }
153 
154 static 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 
162 static 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 	/* disable and clear irqs */
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 	/* bypass TV gamma table */
210 	dispc_enable_gamma_table(0);
211 
212 	/* tv size */
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 
228 err_mgr_enable:
229 	hdmi_wp_video_stop(&hdmi.wp);
230 err_vid_enable:
231 	hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
232 err_phy_pwr:
233 err_phy_cfg:
234 err_pll_cfg:
235 	dss_pll_disable(&hdmi.pll.pll);
236 err_pll_enable:
237 	hdmi_power_off_core(dssdev);
238 	return -EIO;
239 }
240 
241 static 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 
258 static 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 
269 static 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 
281 static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
282 		struct omap_video_timings *timings)
283 {
284 	*timings = hdmi.cfg.timings;
285 }
286 
287 static 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 
305 static 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 
322 static 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 
328 static 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 
334 static 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 
375 err0:
376 	mutex_unlock(&hdmi.lock);
377 	return r;
378 }
379 
380 static 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 
398 static 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 
415 err0:
416 	mutex_unlock(&hdmi.lock);
417 	return r;
418 }
419 
420 static 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 
431 static 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 
460 static 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 
474 static 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 
496 static 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 
503 static 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 
510 static 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 
526 static 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 
541 static 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 
548 static 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 
565 err:
566 	of_node_put(ep);
567 	return r;
568 }
569 
570 /* Audio callbacks */
571 static 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 
586 out:
587 	mutex_unlock(&hd->lock);
588 
589 	return ret;
590 }
591 
592 static 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 
605 static 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 
622 static 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 
638 static 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 	}
657 out:
658 	mutex_unlock(&hd->lock);
659 
660 	return ret;
661 }
662 
663 static 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 
671 static 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 /* HDMI HW IP initialisation */
691 static 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;
755 err:
756 	hdmi_pll_uninit(&hdmi.pll);
757 	return r;
758 }
759 
760 static 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 
774 static const struct component_ops hdmi4_component_ops = {
775 	.bind	= hdmi4_bind,
776 	.unbind	= hdmi4_unbind,
777 };
778 
779 static int hdmi4_probe(struct platform_device *pdev)
780 {
781 	return component_add(&pdev->dev, &hdmi4_component_ops);
782 }
783 
784 static int hdmi4_remove(struct platform_device *pdev)
785 {
786 	component_del(&pdev->dev, &hdmi4_component_ops);
787 	return 0;
788 }
789 
790 static int hdmi_runtime_suspend(struct device *dev)
791 {
792 	dispc_runtime_put();
793 
794 	return 0;
795 }
796 
797 static 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 
808 static const struct dev_pm_ops hdmi_pm_ops = {
809 	.runtime_suspend = hdmi_runtime_suspend,
810 	.runtime_resume = hdmi_runtime_resume,
811 };
812 
813 static const struct of_device_id hdmi_of_match[] = {
814 	{ .compatible = "ti,omap4-hdmi", },
815 	{},
816 };
817 
818 static 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 
829 int __init hdmi4_init_platform_driver(void)
830 {
831 	return platform_driver_register(&omapdss_hdmihw_driver);
832 }
833 
834 void hdmi4_uninit_platform_driver(void)
835 {
836 	platform_driver_unregister(&omapdss_hdmihw_driver);
837 }
838