1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * HDMI interface DSS driver for TI's OMAP4 family of SoCs.
4  * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com/
5  * Authors: Yong Zhi
6  *	Mythri pk <mythripk@ti.com>
7  */
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/of.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 
33 static struct omap_hdmi hdmi;
34 
35 static int hdmi_runtime_get(void)
36 {
37 	int r;
38 
39 	DSSDBG("hdmi_runtime_get\n");
40 
41 	r = pm_runtime_resume_and_get(&hdmi.pdev->dev);
42 	if (WARN_ON(r < 0))
43 		return r;
44 
45 	return 0;
46 }
47 
48 static void hdmi_runtime_put(void)
49 {
50 	int r;
51 
52 	DSSDBG("hdmi_runtime_put\n");
53 
54 	r = pm_runtime_put_sync(&hdmi.pdev->dev);
55 	WARN_ON(r < 0 && r != -ENOSYS);
56 }
57 
58 static irqreturn_t hdmi_irq_handler(int irq, void *data)
59 {
60 	struct hdmi_wp_data *wp = data;
61 	u32 irqstatus;
62 
63 	irqstatus = hdmi_wp_get_irqstatus(wp);
64 	hdmi_wp_set_irqstatus(wp, irqstatus);
65 
66 	if ((irqstatus & HDMI_IRQ_LINK_CONNECT) &&
67 			irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
68 		/*
69 		 * If we get both connect and disconnect interrupts at the same
70 		 * time, turn off the PHY, clear interrupts, and restart, which
71 		 * raises connect interrupt if a cable is connected, or nothing
72 		 * if cable is not connected.
73 		 */
74 		hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF);
75 
76 		hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT |
77 				HDMI_IRQ_LINK_DISCONNECT);
78 
79 		hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
80 	} else if (irqstatus & HDMI_IRQ_LINK_CONNECT) {
81 		hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_TXON);
82 	} else if (irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
83 		hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
84 	}
85 
86 	return IRQ_HANDLED;
87 }
88 
89 static int hdmi_init_regulator(void)
90 {
91 	struct regulator *reg;
92 
93 	if (hdmi.vdda_reg != NULL)
94 		return 0;
95 
96 	reg = devm_regulator_get(&hdmi.pdev->dev, "vdda");
97 
98 	if (IS_ERR(reg)) {
99 		if (PTR_ERR(reg) != -EPROBE_DEFER)
100 			DSSERR("can't get VDDA regulator\n");
101 		return PTR_ERR(reg);
102 	}
103 
104 	hdmi.vdda_reg = reg;
105 
106 	return 0;
107 }
108 
109 static int hdmi_power_on_core(struct omap_dss_device *dssdev)
110 {
111 	int r;
112 
113 	r = regulator_enable(hdmi.vdda_reg);
114 	if (r)
115 		return r;
116 
117 	r = hdmi_runtime_get();
118 	if (r)
119 		goto err_runtime_get;
120 
121 	/* Make selection of HDMI in DSS */
122 	dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK);
123 
124 	hdmi.core_enabled = true;
125 
126 	return 0;
127 
128 err_runtime_get:
129 	regulator_disable(hdmi.vdda_reg);
130 
131 	return r;
132 }
133 
134 static void hdmi_power_off_core(struct omap_dss_device *dssdev)
135 {
136 	hdmi.core_enabled = false;
137 
138 	hdmi_runtime_put();
139 	regulator_disable(hdmi.vdda_reg);
140 }
141 
142 static int hdmi_power_on_full(struct omap_dss_device *dssdev)
143 {
144 	int r;
145 	struct omap_video_timings *p;
146 	struct omap_overlay_manager *mgr = hdmi.output.manager;
147 	struct hdmi_wp_data *wp = &hdmi.wp;
148 	struct dss_pll_clock_info hdmi_cinfo = { 0 };
149 
150 	r = hdmi_power_on_core(dssdev);
151 	if (r)
152 		return r;
153 
154 	/* disable and clear irqs */
155 	hdmi_wp_clear_irqenable(wp, 0xffffffff);
156 	hdmi_wp_set_irqstatus(wp, 0xffffffff);
157 
158 	p = &hdmi.cfg.timings;
159 
160 	DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res);
161 
162 	hdmi_pll_compute(&hdmi.pll, p->pixelclock, &hdmi_cinfo);
163 
164 	r = dss_pll_enable(&hdmi.pll.pll);
165 	if (r) {
166 		DSSERR("Failed to enable PLL\n");
167 		goto err_pll_enable;
168 	}
169 
170 	r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo);
171 	if (r) {
172 		DSSERR("Failed to configure PLL\n");
173 		goto err_pll_cfg;
174 	}
175 
176 	r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco,
177 		hdmi_cinfo.clkout[0]);
178 	if (r) {
179 		DSSDBG("Failed to configure PHY\n");
180 		goto err_phy_cfg;
181 	}
182 
183 	r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
184 	if (r)
185 		goto err_phy_pwr;
186 
187 	hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg);
188 
189 	/* bypass TV gamma table */
190 	dispc_enable_gamma_table(0);
191 
192 	/* tv size */
193 	dss_mgr_set_timings(mgr, p);
194 
195 	r = hdmi_wp_video_start(&hdmi.wp);
196 	if (r)
197 		goto err_vid_enable;
198 
199 	r = dss_mgr_enable(mgr);
200 	if (r)
201 		goto err_mgr_enable;
202 
203 	hdmi_wp_set_irqenable(wp,
204 		HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);
205 
206 	return 0;
207 
208 err_mgr_enable:
209 	hdmi_wp_video_stop(&hdmi.wp);
210 err_vid_enable:
211 	hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
212 err_phy_pwr:
213 err_phy_cfg:
214 err_pll_cfg:
215 	dss_pll_disable(&hdmi.pll.pll);
216 err_pll_enable:
217 	hdmi_power_off_core(dssdev);
218 	return -EIO;
219 }
220 
221 static void hdmi_power_off_full(struct omap_dss_device *dssdev)
222 {
223 	struct omap_overlay_manager *mgr = hdmi.output.manager;
224 
225 	hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);
226 
227 	dss_mgr_disable(mgr);
228 
229 	hdmi_wp_video_stop(&hdmi.wp);
230 
231 	hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
232 
233 	dss_pll_disable(&hdmi.pll.pll);
234 
235 	hdmi_power_off_core(dssdev);
236 }
237 
238 static int hdmi_display_check_timing(struct omap_dss_device *dssdev,
239 					struct omap_video_timings *timings)
240 {
241 	struct omap_dss_device *out = &hdmi.output;
242 
243 	if (!dispc_mgr_timings_ok(out->dispc_channel, timings))
244 		return -EINVAL;
245 
246 	return 0;
247 }
248 
249 static void hdmi_display_set_timing(struct omap_dss_device *dssdev,
250 		struct omap_video_timings *timings)
251 {
252 	mutex_lock(&hdmi.lock);
253 
254 	hdmi.cfg.timings = *timings;
255 
256 	dispc_set_tv_pclk(timings->pixelclock);
257 
258 	mutex_unlock(&hdmi.lock);
259 }
260 
261 static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
262 		struct omap_video_timings *timings)
263 {
264 	*timings = hdmi.cfg.timings;
265 }
266 
267 static void hdmi_dump_regs(struct seq_file *s)
268 {
269 	mutex_lock(&hdmi.lock);
270 
271 	if (hdmi_runtime_get()) {
272 		mutex_unlock(&hdmi.lock);
273 		return;
274 	}
275 
276 	hdmi_wp_dump(&hdmi.wp, s);
277 	hdmi_pll_dump(&hdmi.pll, s);
278 	hdmi_phy_dump(&hdmi.phy, s);
279 	hdmi4_core_dump(&hdmi.core, s);
280 
281 	hdmi_runtime_put();
282 	mutex_unlock(&hdmi.lock);
283 }
284 
285 static int read_edid(u8 *buf, int len)
286 {
287 	int r;
288 
289 	mutex_lock(&hdmi.lock);
290 
291 	r = hdmi_runtime_get();
292 	BUG_ON(r);
293 
294 	r = hdmi4_read_edid(&hdmi.core,  buf, len);
295 
296 	hdmi_runtime_put();
297 	mutex_unlock(&hdmi.lock);
298 
299 	return r;
300 }
301 
302 static void hdmi_start_audio_stream(struct omap_hdmi *hd)
303 {
304 	hdmi_wp_audio_enable(&hd->wp, true);
305 	hdmi4_audio_start(&hd->core, &hd->wp);
306 }
307 
308 static void hdmi_stop_audio_stream(struct omap_hdmi *hd)
309 {
310 	hdmi4_audio_stop(&hd->core, &hd->wp);
311 	hdmi_wp_audio_enable(&hd->wp, false);
312 }
313 
314 static int hdmi_display_enable(struct omap_dss_device *dssdev)
315 {
316 	struct omap_dss_device *out = &hdmi.output;
317 	unsigned long flags;
318 	int r = 0;
319 
320 	DSSDBG("ENTER hdmi_display_enable\n");
321 
322 	mutex_lock(&hdmi.lock);
323 
324 	if (out->manager == NULL) {
325 		DSSERR("failed to enable display: no output/manager\n");
326 		r = -ENODEV;
327 		goto err0;
328 	}
329 
330 	r = hdmi_power_on_full(dssdev);
331 	if (r) {
332 		DSSERR("failed to power on device\n");
333 		goto err0;
334 	}
335 
336 	if (hdmi.audio_configured) {
337 		r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config,
338 				       hdmi.cfg.timings.pixelclock);
339 		if (r) {
340 			DSSERR("Error restoring audio configuration: %d", r);
341 			hdmi.audio_abort_cb(&hdmi.pdev->dev);
342 			hdmi.audio_configured = false;
343 		}
344 	}
345 
346 	spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
347 	if (hdmi.audio_configured && hdmi.audio_playing)
348 		hdmi_start_audio_stream(&hdmi);
349 	hdmi.display_enabled = true;
350 	spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
351 
352 	mutex_unlock(&hdmi.lock);
353 	return 0;
354 
355 err0:
356 	mutex_unlock(&hdmi.lock);
357 	return r;
358 }
359 
360 static void hdmi_display_disable(struct omap_dss_device *dssdev)
361 {
362 	unsigned long flags;
363 
364 	DSSDBG("Enter hdmi_display_disable\n");
365 
366 	mutex_lock(&hdmi.lock);
367 
368 	spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
369 	hdmi_stop_audio_stream(&hdmi);
370 	hdmi.display_enabled = false;
371 	spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
372 
373 	hdmi_power_off_full(dssdev);
374 
375 	mutex_unlock(&hdmi.lock);
376 }
377 
378 static int hdmi_core_enable(struct omap_dss_device *dssdev)
379 {
380 	int r = 0;
381 
382 	DSSDBG("ENTER omapdss_hdmi_core_enable\n");
383 
384 	mutex_lock(&hdmi.lock);
385 
386 	r = hdmi_power_on_core(dssdev);
387 	if (r) {
388 		DSSERR("failed to power on device\n");
389 		goto err0;
390 	}
391 
392 	mutex_unlock(&hdmi.lock);
393 	return 0;
394 
395 err0:
396 	mutex_unlock(&hdmi.lock);
397 	return r;
398 }
399 
400 static void hdmi_core_disable(struct omap_dss_device *dssdev)
401 {
402 	DSSDBG("Enter omapdss_hdmi_core_disable\n");
403 
404 	mutex_lock(&hdmi.lock);
405 
406 	hdmi_power_off_core(dssdev);
407 
408 	mutex_unlock(&hdmi.lock);
409 }
410 
411 static int hdmi_connect(struct omap_dss_device *dssdev,
412 		struct omap_dss_device *dst)
413 {
414 	struct omap_overlay_manager *mgr;
415 	int r;
416 
417 	r = hdmi_init_regulator();
418 	if (r)
419 		return r;
420 
421 	mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel);
422 	if (!mgr)
423 		return -ENODEV;
424 
425 	r = dss_mgr_connect(mgr, dssdev);
426 	if (r)
427 		return r;
428 
429 	r = omapdss_output_set_device(dssdev, dst);
430 	if (r) {
431 		DSSERR("failed to connect output to new device: %s\n",
432 				dst->name);
433 		dss_mgr_disconnect(mgr, dssdev);
434 		return r;
435 	}
436 
437 	return 0;
438 }
439 
440 static void hdmi_disconnect(struct omap_dss_device *dssdev,
441 		struct omap_dss_device *dst)
442 {
443 	WARN_ON(dst != dssdev->dst);
444 
445 	if (dst != dssdev->dst)
446 		return;
447 
448 	omapdss_output_unset_device(dssdev);
449 
450 	if (dssdev->manager)
451 		dss_mgr_disconnect(dssdev->manager, dssdev);
452 }
453 
454 static int hdmi_read_edid(struct omap_dss_device *dssdev,
455 		u8 *edid, int len)
456 {
457 	bool need_enable = !hdmi.core_enabled;
458 	int r;
459 
460 	if (need_enable) {
461 		r = hdmi_core_enable(dssdev);
462 		if (r)
463 			return r;
464 	}
465 
466 	r = read_edid(edid, len);
467 
468 	if (need_enable)
469 		hdmi_core_disable(dssdev);
470 
471 	return r;
472 }
473 
474 static int hdmi_set_infoframe(struct omap_dss_device *dssdev,
475 		const struct hdmi_avi_infoframe *avi)
476 {
477 	hdmi.cfg.infoframe = *avi;
478 	return 0;
479 }
480 
481 static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev,
482 		bool hdmi_mode)
483 {
484 	hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI;
485 	return 0;
486 }
487 
488 static const struct omapdss_hdmi_ops hdmi_ops = {
489 	.connect		= hdmi_connect,
490 	.disconnect		= hdmi_disconnect,
491 
492 	.enable			= hdmi_display_enable,
493 	.disable		= hdmi_display_disable,
494 
495 	.check_timings		= hdmi_display_check_timing,
496 	.set_timings		= hdmi_display_set_timing,
497 	.get_timings		= hdmi_display_get_timings,
498 
499 	.read_edid		= hdmi_read_edid,
500 	.set_infoframe		= hdmi_set_infoframe,
501 	.set_hdmi_mode		= hdmi_set_hdmi_mode,
502 };
503 
504 static void hdmi_init_output(struct platform_device *pdev)
505 {
506 	struct omap_dss_device *out = &hdmi.output;
507 
508 	out->dev = &pdev->dev;
509 	out->id = OMAP_DSS_OUTPUT_HDMI;
510 	out->output_type = OMAP_DISPLAY_TYPE_HDMI;
511 	out->name = "hdmi.0";
512 	out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
513 	out->ops.hdmi = &hdmi_ops;
514 	out->owner = THIS_MODULE;
515 
516 	omapdss_register_output(out);
517 }
518 
519 static void hdmi_uninit_output(struct platform_device *pdev)
520 {
521 	struct omap_dss_device *out = &hdmi.output;
522 
523 	omapdss_unregister_output(out);
524 }
525 
526 static int hdmi_probe_of(struct platform_device *pdev)
527 {
528 	struct device_node *node = pdev->dev.of_node;
529 	struct device_node *ep;
530 	int r;
531 
532 	ep = omapdss_of_get_first_endpoint(node);
533 	if (!ep)
534 		return 0;
535 
536 	r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy);
537 	if (r)
538 		goto err;
539 
540 	of_node_put(ep);
541 	return 0;
542 
543 err:
544 	of_node_put(ep);
545 	return r;
546 }
547 
548 /* Audio callbacks */
549 static int hdmi_audio_startup(struct device *dev,
550 			      void (*abort_cb)(struct device *dev))
551 {
552 	struct omap_hdmi *hd = dev_get_drvdata(dev);
553 	int ret = 0;
554 
555 	mutex_lock(&hd->lock);
556 
557 	if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
558 		ret = -EPERM;
559 		goto out;
560 	}
561 
562 	hd->audio_abort_cb = abort_cb;
563 
564 out:
565 	mutex_unlock(&hd->lock);
566 
567 	return ret;
568 }
569 
570 static int hdmi_audio_shutdown(struct device *dev)
571 {
572 	struct omap_hdmi *hd = dev_get_drvdata(dev);
573 
574 	mutex_lock(&hd->lock);
575 	hd->audio_abort_cb = NULL;
576 	hd->audio_configured = false;
577 	hd->audio_playing = false;
578 	mutex_unlock(&hd->lock);
579 
580 	return 0;
581 }
582 
583 static int hdmi_audio_start(struct device *dev)
584 {
585 	struct omap_hdmi *hd = dev_get_drvdata(dev);
586 	unsigned long flags;
587 
588 	WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
589 
590 	spin_lock_irqsave(&hd->audio_playing_lock, flags);
591 
592 	if (hd->display_enabled)
593 		hdmi_start_audio_stream(hd);
594 	hd->audio_playing = true;
595 
596 	spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
597 	return 0;
598 }
599 
600 static void hdmi_audio_stop(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_stop_audio_stream(hd);
611 	hd->audio_playing = false;
612 
613 	spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
614 }
615 
616 static int hdmi_audio_config(struct device *dev,
617 			     struct omap_dss_audio *dss_audio)
618 {
619 	struct omap_hdmi *hd = dev_get_drvdata(dev);
620 	int ret;
621 
622 	mutex_lock(&hd->lock);
623 
624 	if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
625 		ret = -EPERM;
626 		goto out;
627 	}
628 
629 	ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
630 				 hd->cfg.timings.pixelclock);
631 	if (!ret) {
632 		hd->audio_configured = true;
633 		hd->audio_config = *dss_audio;
634 	}
635 out:
636 	mutex_unlock(&hd->lock);
637 
638 	return ret;
639 }
640 
641 static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
642 	.audio_startup = hdmi_audio_startup,
643 	.audio_shutdown = hdmi_audio_shutdown,
644 	.audio_start = hdmi_audio_start,
645 	.audio_stop = hdmi_audio_stop,
646 	.audio_config = hdmi_audio_config,
647 };
648 
649 static int hdmi_audio_register(struct device *dev)
650 {
651 	struct omap_hdmi_audio_pdata pdata = {
652 		.dev = dev,
653 		.version = 4,
654 		.audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),
655 		.ops = &hdmi_audio_ops,
656 	};
657 
658 	hdmi.audio_pdev = platform_device_register_data(
659 		dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
660 		&pdata, sizeof(pdata));
661 
662 	return PTR_ERR_OR_ZERO(hdmi.audio_pdev);
663 }
664 
665 /* HDMI HW IP initialisation */
666 static int hdmi4_bind(struct device *dev, struct device *master, void *data)
667 {
668 	struct platform_device *pdev = to_platform_device(dev);
669 	int r;
670 	int irq;
671 
672 	hdmi.pdev = pdev;
673 	platform_set_drvdata(pdev, &hdmi);
674 
675 	mutex_init(&hdmi.lock);
676 	spin_lock_init(&hdmi.audio_playing_lock);
677 
678 	if (pdev->dev.of_node) {
679 		r = hdmi_probe_of(pdev);
680 		if (r)
681 			return r;
682 	}
683 
684 	r = hdmi_wp_init(pdev, &hdmi.wp);
685 	if (r)
686 		return r;
687 
688 	r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp);
689 	if (r)
690 		return r;
691 
692 	r = hdmi_phy_init(pdev, &hdmi.phy);
693 	if (r)
694 		goto err;
695 
696 	r = hdmi4_core_init(pdev, &hdmi.core);
697 	if (r)
698 		goto err;
699 
700 	irq = platform_get_irq(pdev, 0);
701 	if (irq < 0) {
702 		DSSERR("platform_get_irq failed\n");
703 		r = -ENODEV;
704 		goto err;
705 	}
706 
707 	r = devm_request_threaded_irq(&pdev->dev, irq,
708 			NULL, hdmi_irq_handler,
709 			IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp);
710 	if (r) {
711 		DSSERR("HDMI IRQ request failed\n");
712 		goto err;
713 	}
714 
715 	pm_runtime_enable(&pdev->dev);
716 
717 	hdmi_init_output(pdev);
718 
719 	r = hdmi_audio_register(&pdev->dev);
720 	if (r) {
721 		DSSERR("Registering HDMI audio failed\n");
722 		hdmi_uninit_output(pdev);
723 		pm_runtime_disable(&pdev->dev);
724 		return r;
725 	}
726 
727 	dss_debugfs_create_file("hdmi", hdmi_dump_regs);
728 
729 	return 0;
730 err:
731 	hdmi_pll_uninit(&hdmi.pll);
732 	return r;
733 }
734 
735 static void hdmi4_unbind(struct device *dev, struct device *master, void *data)
736 {
737 	struct platform_device *pdev = to_platform_device(dev);
738 
739 	if (hdmi.audio_pdev)
740 		platform_device_unregister(hdmi.audio_pdev);
741 
742 	hdmi_uninit_output(pdev);
743 
744 	hdmi_pll_uninit(&hdmi.pll);
745 
746 	pm_runtime_disable(&pdev->dev);
747 }
748 
749 static const struct component_ops hdmi4_component_ops = {
750 	.bind	= hdmi4_bind,
751 	.unbind	= hdmi4_unbind,
752 };
753 
754 static int hdmi4_probe(struct platform_device *pdev)
755 {
756 	return component_add(&pdev->dev, &hdmi4_component_ops);
757 }
758 
759 static int hdmi4_remove(struct platform_device *pdev)
760 {
761 	component_del(&pdev->dev, &hdmi4_component_ops);
762 	return 0;
763 }
764 
765 static int hdmi_runtime_suspend(struct device *dev)
766 {
767 	dispc_runtime_put();
768 
769 	return 0;
770 }
771 
772 static int hdmi_runtime_resume(struct device *dev)
773 {
774 	int r;
775 
776 	r = dispc_runtime_get();
777 	if (r < 0)
778 		return r;
779 
780 	return 0;
781 }
782 
783 static const struct dev_pm_ops hdmi_pm_ops = {
784 	.runtime_suspend = hdmi_runtime_suspend,
785 	.runtime_resume = hdmi_runtime_resume,
786 };
787 
788 static const struct of_device_id hdmi_of_match[] = {
789 	{ .compatible = "ti,omap4-hdmi", },
790 	{},
791 };
792 
793 static struct platform_driver omapdss_hdmihw_driver = {
794 	.probe		= hdmi4_probe,
795 	.remove		= hdmi4_remove,
796 	.driver         = {
797 		.name   = "omapdss_hdmi",
798 		.pm	= &hdmi_pm_ops,
799 		.of_match_table = hdmi_of_match,
800 		.suppress_bind_attrs = true,
801 	},
802 };
803 
804 int __init hdmi4_init_platform_driver(void)
805 {
806 	return platform_driver_register(&omapdss_hdmihw_driver);
807 }
808 
809 void hdmi4_uninit_platform_driver(void)
810 {
811 	platform_driver_unregister(&omapdss_hdmihw_driver);
812 }
813