hdmi4.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * HDMI interface DSS driver for TI's OMAP4 family of SoCs.
  4 *
  5 * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com/
  6 * Authors: Yong Zhi
  7 *	Mythri pk <mythripk@ti.com>
  8 */
  9
 10#define DSS_SUBSYS_NAME "HDMI"
 11
 12#include <linux/kernel.h>
 13#include <linux/module.h>
 14#include <linux/err.h>
 15#include <linux/io.h>
 16#include <linux/interrupt.h>
 17#include <linux/mutex.h>
 18#include <linux/delay.h>
 19#include <linux/string.h>
 20#include <linux/platform_device.h>
 21#include <linux/pm_runtime.h>
 22#include <linux/clk.h>
 23#include <linux/regulator/consumer.h>
 24#include <linux/component.h>
 25#include <linux/of.h>
 26#include <linux/of_graph.h>
 27#include <sound/omap-hdmi-audio.h>
 28#include <media/cec.h>
 29
 30#include <drm/drm_atomic.h>
 31#include <drm/drm_atomic_state_helper.h>
 32#include <drm/drm_edid.h>
 33
 34#include "omapdss.h"
 35#include "hdmi4_core.h"
 36#include "hdmi4_cec.h"
 37#include "dss.h"
 38#include "hdmi.h"
 39
 40static int hdmi_runtime_get(struct omap_hdmi *hdmi)
 41{
 42	int r;
 43
 44	DSSDBG("hdmi_runtime_get\n");
 45
 46	r = pm_runtime_get_sync(&hdmi->pdev->dev);
 47	if (WARN_ON(r < 0)) {
 48		pm_runtime_put_noidle(&hdmi->pdev->dev);
 49		return r;
 50	}
 51	return 0;
 52}
 53
 54static void hdmi_runtime_put(struct omap_hdmi *hdmi)
 55{
 56	int r;
 57
 58	DSSDBG("hdmi_runtime_put\n");
 59
 60	r = pm_runtime_put_sync(&hdmi->pdev->dev);
 61	WARN_ON(r < 0 && r != -ENOSYS);
 62}
 63
 64static irqreturn_t hdmi_irq_handler(int irq, void *data)
 65{
 66	struct omap_hdmi *hdmi = data;
 67	struct hdmi_wp_data *wp = &hdmi->wp;
 68	u32 irqstatus;
 69
 70	irqstatus = hdmi_wp_get_irqstatus(wp);
 71	hdmi_wp_set_irqstatus(wp, irqstatus);
 72
 73	if ((irqstatus & HDMI_IRQ_LINK_CONNECT) &&
 74			irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
 75		/*
 76		 * If we get both connect and disconnect interrupts at the same
 77		 * time, turn off the PHY, clear interrupts, and restart, which
 78		 * raises connect interrupt if a cable is connected, or nothing
 79		 * if cable is not connected.
 80		 */
 81		hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF);
 82
 83		hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT |
 84				HDMI_IRQ_LINK_DISCONNECT);
 85
 86		hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
 87	} else if (irqstatus & HDMI_IRQ_LINK_CONNECT) {
 88		hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_TXON);
 89	} else if (irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
 90		hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
 91	}
 92	if (irqstatus & HDMI_IRQ_CORE) {
 93		u32 intr4 = hdmi_read_reg(hdmi->core.base, HDMI_CORE_SYS_INTR4);
 94
 95		hdmi_write_reg(hdmi->core.base, HDMI_CORE_SYS_INTR4, intr4);
 96		if (intr4 & 8)
 97			hdmi4_cec_irq(&hdmi->core);
 98	}
 99
100	return IRQ_HANDLED;
101}
102
103static int hdmi_power_on_core(struct omap_hdmi *hdmi)
104{
105	int r;
106
107	if (hdmi->core.core_pwr_cnt++)
108		return 0;
109
110	r = regulator_enable(hdmi->vdda_reg);
111	if (r)
112		goto err_reg_enable;
113
114	r = hdmi_runtime_get(hdmi);
115	if (r)
116		goto err_runtime_get;
117
118	hdmi4_core_powerdown_disable(&hdmi->core);
119
120	/* Make selection of HDMI in DSS */
121	dss_select_hdmi_venc_clk_source(hdmi->dss, DSS_HDMI_M_PCLK);
122
123	hdmi->core_enabled = true;
124
125	return 0;
126
127err_runtime_get:
128	regulator_disable(hdmi->vdda_reg);
129err_reg_enable:
130	hdmi->core.core_pwr_cnt--;
131
132	return r;
133}
134
135static void hdmi_power_off_core(struct omap_hdmi *hdmi)
136{
137	if (--hdmi->core.core_pwr_cnt)
138		return;
139
140	hdmi->core_enabled = false;
141
142	hdmi_runtime_put(hdmi);
143	regulator_disable(hdmi->vdda_reg);
144}
145
146static int hdmi_power_on_full(struct omap_hdmi *hdmi)
147{
148	int r;
149	const struct videomode *vm;
150	struct hdmi_wp_data *wp = &hdmi->wp;
151	struct dss_pll_clock_info hdmi_cinfo = { 0 };
152	unsigned int pc;
153
154	r = hdmi_power_on_core(hdmi);
155	if (r)
156		return r;
157
158	/* disable and clear irqs */
159	hdmi_wp_clear_irqenable(wp, ~HDMI_IRQ_CORE);
160	hdmi_wp_set_irqstatus(wp, ~HDMI_IRQ_CORE);
161
162	vm = &hdmi->cfg.vm;
163
164	DSSDBG("hdmi_power_on hactive= %d vactive = %d\n", vm->hactive,
165	       vm->vactive);
166
167	pc = vm->pixelclock;
168	if (vm->flags & DISPLAY_FLAGS_DOUBLECLK)
169		pc *= 2;
170
171	/* DSS_HDMI_TCLK is bitclk / 10 */
172	pc *= 10;
173
174	dss_pll_calc_b(&hdmi->pll.pll, clk_get_rate(hdmi->pll.pll.clkin),
175		pc, &hdmi_cinfo);
176
177	r = dss_pll_enable(&hdmi->pll.pll);
178	if (r) {
179		DSSERR("Failed to enable PLL\n");
180		goto err_pll_enable;
181	}
182
183	r = dss_pll_set_config(&hdmi->pll.pll, &hdmi_cinfo);
184	if (r) {
185		DSSERR("Failed to configure PLL\n");
186		goto err_pll_cfg;
187	}
188
189	r = hdmi_phy_configure(&hdmi->phy, hdmi_cinfo.clkdco,
190		hdmi_cinfo.clkout[0]);
191	if (r) {
192		DSSDBG("Failed to configure PHY\n");
193		goto err_phy_cfg;
194	}
195
196	r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
197	if (r)
198		goto err_phy_pwr;
199
200	hdmi4_configure(&hdmi->core, &hdmi->wp, &hdmi->cfg);
201
202	r = dss_mgr_enable(&hdmi->output);
203	if (r)
204		goto err_mgr_enable;
205
206	r = hdmi_wp_video_start(&hdmi->wp);
207	if (r)
208		goto err_vid_enable;
209
210	hdmi_wp_set_irqenable(wp,
211		HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);
212
213	return 0;
214
215err_vid_enable:
216	dss_mgr_disable(&hdmi->output);
217err_mgr_enable:
218	hdmi_wp_set_phy_pwr(&hdmi->wp, HDMI_PHYPWRCMD_OFF);
219err_phy_pwr:
220err_phy_cfg:
221err_pll_cfg:
222	dss_pll_disable(&hdmi->pll.pll);
223err_pll_enable:
224	hdmi_power_off_core(hdmi);
225	return -EIO;
226}
227
228static void hdmi_power_off_full(struct omap_hdmi *hdmi)
229{
230	hdmi_wp_clear_irqenable(&hdmi->wp, ~HDMI_IRQ_CORE);
231
232	hdmi_wp_video_stop(&hdmi->wp);
233
234	dss_mgr_disable(&hdmi->output);
235
236	hdmi_wp_set_phy_pwr(&hdmi->wp, HDMI_PHYPWRCMD_OFF);
237
238	dss_pll_disable(&hdmi->pll.pll);
239
240	hdmi_power_off_core(hdmi);
241}
242
243static int hdmi_dump_regs(struct seq_file *s, void *p)
244{
245	struct omap_hdmi *hdmi = s->private;
246
247	mutex_lock(&hdmi->lock);
248
249	if (hdmi_runtime_get(hdmi)) {
250		mutex_unlock(&hdmi->lock);
251		return 0;
252	}
253
254	hdmi_wp_dump(&hdmi->wp, s);
255	hdmi_pll_dump(&hdmi->pll, s);
256	hdmi_phy_dump(&hdmi->phy, s);
257	hdmi4_core_dump(&hdmi->core, s);
258
259	hdmi_runtime_put(hdmi);
260	mutex_unlock(&hdmi->lock);
261	return 0;
262}
263
264static void hdmi_start_audio_stream(struct omap_hdmi *hd)
265{
266	hdmi_wp_audio_enable(&hd->wp, true);
267	hdmi4_audio_start(&hd->core, &hd->wp);
268}
269
270static void hdmi_stop_audio_stream(struct omap_hdmi *hd)
271{
272	hdmi4_audio_stop(&hd->core, &hd->wp);
273	hdmi_wp_audio_enable(&hd->wp, false);
274}
275
276int hdmi4_core_enable(struct hdmi_core_data *core)
277{
278	struct omap_hdmi *hdmi = container_of(core, struct omap_hdmi, core);
279	int r = 0;
280
281	DSSDBG("ENTER omapdss_hdmi4_core_enable\n");
282
283	mutex_lock(&hdmi->lock);
284
285	r = hdmi_power_on_core(hdmi);
286	if (r) {
287		DSSERR("failed to power on device\n");
288		goto err0;
289	}
290
291	mutex_unlock(&hdmi->lock);
292	return 0;
293
294err0:
295	mutex_unlock(&hdmi->lock);
296	return r;
297}
298
299void hdmi4_core_disable(struct hdmi_core_data *core)
300{
301	struct omap_hdmi *hdmi = container_of(core, struct omap_hdmi, core);
302
303	DSSDBG("Enter omapdss_hdmi4_core_disable\n");
304
305	mutex_lock(&hdmi->lock);
306
307	hdmi_power_off_core(hdmi);
308
309	mutex_unlock(&hdmi->lock);
310}
311
312/* -----------------------------------------------------------------------------
313 * DRM Bridge Operations
314 */
315
316static int hdmi4_bridge_attach(struct drm_bridge *bridge,
317			       struct drm_encoder *encoder,
318			       enum drm_bridge_attach_flags flags)
319{
320	struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge);
321
322	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
323		return -EINVAL;
324
325	return drm_bridge_attach(encoder, hdmi->output.next_bridge,
326				 bridge, flags);
327}
328
329static void hdmi4_bridge_mode_set(struct drm_bridge *bridge,
330				  const struct drm_display_mode *mode,
331				  const struct drm_display_mode *adjusted_mode)
332{
333	struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge);
334
335	mutex_lock(&hdmi->lock);
336
337	drm_display_mode_to_videomode(adjusted_mode, &hdmi->cfg.vm);
338
339	dispc_set_tv_pclk(hdmi->dss->dispc, adjusted_mode->clock * 1000);
340
341	mutex_unlock(&hdmi->lock);
342}
343
344static void hdmi4_bridge_enable(struct drm_bridge *bridge,
345				struct drm_atomic_state *state)
346{
347	struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge);
348	struct drm_connector_state *conn_state;
349	struct drm_connector *connector;
350	struct drm_crtc_state *crtc_state;
351	unsigned long flags;
352	int ret;
353
354	/*
355	 * None of these should fail, as the bridge can't be enabled without a
356	 * valid CRTC to connector path with fully populated new states.
357	 */
358	connector = drm_atomic_get_new_connector_for_encoder(state,
359							     bridge->encoder);
360	if (WARN_ON(!connector))
361		return;
362	conn_state = drm_atomic_get_new_connector_state(state, connector);
363	if (WARN_ON(!conn_state))
364		return;
365	crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
366	if (WARN_ON(!crtc_state))
367		return;
368
369	hdmi->cfg.hdmi_dvi_mode = connector->display_info.is_hdmi
370				? HDMI_HDMI : HDMI_DVI;
371
372	if (connector->display_info.is_hdmi) {
373		const struct drm_display_mode *mode;
374		struct hdmi_avi_infoframe avi;
375
376		mode = &crtc_state->adjusted_mode;
377		ret = drm_hdmi_avi_infoframe_from_display_mode(&avi, connector,
378							       mode);
379		if (ret == 0)
380			hdmi->cfg.infoframe = avi;
381	}
382
383	mutex_lock(&hdmi->lock);
384
385	ret = hdmi_power_on_full(hdmi);
386	if (ret) {
387		DSSERR("failed to power on device\n");
388		goto done;
389	}
390
391	if (hdmi->audio_configured) {
392		ret = hdmi4_audio_config(&hdmi->core, &hdmi->wp,
393					 &hdmi->audio_config,
394					 hdmi->cfg.vm.pixelclock);
395		if (ret) {
396			DSSERR("Error restoring audio configuration: %d", ret);
397			hdmi->audio_abort_cb(&hdmi->pdev->dev);
398			hdmi->audio_configured = false;
399		}
400	}
401
402	spin_lock_irqsave(&hdmi->audio_playing_lock, flags);
403	if (hdmi->audio_configured && hdmi->audio_playing)
404		hdmi_start_audio_stream(hdmi);
405	hdmi->display_enabled = true;
406	spin_unlock_irqrestore(&hdmi->audio_playing_lock, flags);
407
408done:
409	mutex_unlock(&hdmi->lock);
410}
411
412static void hdmi4_bridge_disable(struct drm_bridge *bridge,
413				 struct drm_atomic_state *state)
414{
415	struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge);
416	unsigned long flags;
417
418	mutex_lock(&hdmi->lock);
419
420	spin_lock_irqsave(&hdmi->audio_playing_lock, flags);
421	hdmi_stop_audio_stream(hdmi);
422	hdmi->display_enabled = false;
423	spin_unlock_irqrestore(&hdmi->audio_playing_lock, flags);
424
425	hdmi_power_off_full(hdmi);
426
427	mutex_unlock(&hdmi->lock);
428}
429
430static void hdmi4_bridge_hpd_notify(struct drm_bridge *bridge,
431				    enum drm_connector_status status)
432{
433	struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge);
434
435	if (status == connector_status_disconnected)
436		hdmi4_cec_set_phys_addr(&hdmi->core, CEC_PHYS_ADDR_INVALID);
437}
438
439static const struct drm_edid *hdmi4_bridge_edid_read(struct drm_bridge *bridge,
440						     struct drm_connector *connector)
441{
442	struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge);
443	const struct drm_edid *drm_edid = NULL;
444	unsigned int cec_addr;
445	bool need_enable;
446	int r;
447
448	need_enable = hdmi->core_enabled == false;
449
450	if (need_enable) {
451		r = hdmi4_core_enable(&hdmi->core);
452		if (r)
453			return NULL;
454	}
455
456	mutex_lock(&hdmi->lock);
457	r = hdmi_runtime_get(hdmi);
458	BUG_ON(r);
459
460	r = hdmi4_core_ddc_init(&hdmi->core);
461	if (r)
462		goto done;
463
464	drm_edid = drm_edid_read_custom(connector, hdmi4_core_ddc_read, &hdmi->core);
465
466done:
467	hdmi_runtime_put(hdmi);
468	mutex_unlock(&hdmi->lock);
469
470	if (drm_edid) {
471		/*
472		 * FIXME: The CEC physical address should be set using
473		 * hdmi4_cec_set_phys_addr(&hdmi->core,
474		 * connector->display_info.source_physical_address) from a path
475		 * that has read the EDID and called
476		 * drm_edid_connector_update().
477		 */
478		const struct edid *edid = drm_edid_raw(drm_edid);
479		unsigned int len = (edid->extensions + 1) * EDID_LENGTH;
480
481		cec_addr = cec_get_edid_phys_addr((u8 *)edid, len, NULL);
482	} else {
483		cec_addr = CEC_PHYS_ADDR_INVALID;
484	}
485
486	hdmi4_cec_set_phys_addr(&hdmi->core, cec_addr);
487
488	if (need_enable)
489		hdmi4_core_disable(&hdmi->core);
490
491	return drm_edid;
492}
493
494static const struct drm_bridge_funcs hdmi4_bridge_funcs = {
495	.attach = hdmi4_bridge_attach,
496	.mode_set = hdmi4_bridge_mode_set,
497	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
498	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
499	.atomic_reset = drm_atomic_helper_bridge_reset,
500	.atomic_enable = hdmi4_bridge_enable,
501	.atomic_disable = hdmi4_bridge_disable,
502	.hpd_notify = hdmi4_bridge_hpd_notify,
503	.edid_read = hdmi4_bridge_edid_read,
504};
505
506static void hdmi4_bridge_init(struct omap_hdmi *hdmi)
507{
508	hdmi->bridge.of_node = hdmi->pdev->dev.of_node;
509	hdmi->bridge.ops = DRM_BRIDGE_OP_EDID;
510	hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
511
512	drm_bridge_add(&hdmi->bridge);
513}
514
515static void hdmi4_bridge_cleanup(struct omap_hdmi *hdmi)
516{
517	drm_bridge_remove(&hdmi->bridge);
518}
519
520/* -----------------------------------------------------------------------------
521 * Audio Callbacks
522 */
523
524static int hdmi_audio_startup(struct device *dev,
525			      void (*abort_cb)(struct device *dev))
526{
527	struct omap_hdmi *hd = dev_get_drvdata(dev);
528
529	mutex_lock(&hd->lock);
530
531	WARN_ON(hd->audio_abort_cb != NULL);
532
533	hd->audio_abort_cb = abort_cb;
534
535	mutex_unlock(&hd->lock);
536
537	return 0;
538}
539
540static int hdmi_audio_shutdown(struct device *dev)
541{
542	struct omap_hdmi *hd = dev_get_drvdata(dev);
543
544	mutex_lock(&hd->lock);
545	hd->audio_abort_cb = NULL;
546	hd->audio_configured = false;
547	hd->audio_playing = false;
548	mutex_unlock(&hd->lock);
549
550	return 0;
551}
552
553static int hdmi_audio_start(struct device *dev)
554{
555	struct omap_hdmi *hd = dev_get_drvdata(dev);
556	unsigned long flags;
557
558	spin_lock_irqsave(&hd->audio_playing_lock, flags);
559
560	if (hd->display_enabled) {
561		if (!hdmi_mode_has_audio(&hd->cfg))
562			DSSERR("%s: Video mode does not support audio\n",
563			       __func__);
564		hdmi_start_audio_stream(hd);
565	}
566	hd->audio_playing = true;
567
568	spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
569	return 0;
570}
571
572static void hdmi_audio_stop(struct device *dev)
573{
574	struct omap_hdmi *hd = dev_get_drvdata(dev);
575	unsigned long flags;
576
577	WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
578
579	spin_lock_irqsave(&hd->audio_playing_lock, flags);
580
581	if (hd->display_enabled)
582		hdmi_stop_audio_stream(hd);
583	hd->audio_playing = false;
584
585	spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
586}
587
588static int hdmi_audio_config(struct device *dev,
589			     struct omap_dss_audio *dss_audio)
590{
591	struct omap_hdmi *hd = dev_get_drvdata(dev);
592	int ret = 0;
593
594	mutex_lock(&hd->lock);
595
596	if (hd->display_enabled) {
597		ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
598					 hd->cfg.vm.pixelclock);
599		if (ret)
600			goto out;
601	}
602
603	hd->audio_configured = true;
604	hd->audio_config = *dss_audio;
605out:
606	mutex_unlock(&hd->lock);
607
608	return ret;
609}
610
611static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
612	.audio_startup = hdmi_audio_startup,
613	.audio_shutdown = hdmi_audio_shutdown,
614	.audio_start = hdmi_audio_start,
615	.audio_stop = hdmi_audio_stop,
616	.audio_config = hdmi_audio_config,
617};
618
619static int hdmi_audio_register(struct omap_hdmi *hdmi)
620{
621	struct omap_hdmi_audio_pdata pdata = {
622		.dev = &hdmi->pdev->dev,
623		.version = 4,
624		.audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi->wp),
625		.ops = &hdmi_audio_ops,
626	};
627
628	hdmi->audio_pdev = platform_device_register_data(
629		&hdmi->pdev->dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
630		&pdata, sizeof(pdata));
631
632	if (IS_ERR(hdmi->audio_pdev))
633		return PTR_ERR(hdmi->audio_pdev);
634
635	return 0;
636}
637
638/* -----------------------------------------------------------------------------
639 * Component Bind & Unbind
640 */
641
642static int hdmi4_bind(struct device *dev, struct device *master, void *data)
643{
644	struct dss_device *dss = dss_get_device(master);
645	struct omap_hdmi *hdmi = dev_get_drvdata(dev);
646	int r;
647
648	hdmi->dss = dss;
649
650	r = hdmi_runtime_get(hdmi);
651	if (r)
652		return r;
653
654	r = hdmi_pll_init(dss, hdmi->pdev, &hdmi->pll, &hdmi->wp);
655	if (r)
656		goto err_runtime_put;
657
658	r = hdmi4_cec_init(hdmi->pdev, &hdmi->core, &hdmi->wp);
659	if (r)
660		goto err_pll_uninit;
661
662	r = hdmi_audio_register(hdmi);
663	if (r) {
664		DSSERR("Registering HDMI audio failed\n");
665		goto err_cec_uninit;
666	}
667
668	hdmi->debugfs = dss_debugfs_create_file(dss, "hdmi", hdmi_dump_regs,
669					       hdmi);
670
671	hdmi_runtime_put(hdmi);
672
673	return 0;
674
675err_cec_uninit:
676	hdmi4_cec_uninit(&hdmi->core);
677err_pll_uninit:
678	hdmi_pll_uninit(&hdmi->pll);
679err_runtime_put:
680	hdmi_runtime_put(hdmi);
681	return r;
682}
683
684static void hdmi4_unbind(struct device *dev, struct device *master, void *data)
685{
686	struct omap_hdmi *hdmi = dev_get_drvdata(dev);
687
688	dss_debugfs_remove_file(hdmi->debugfs);
689
690	if (hdmi->audio_pdev)
691		platform_device_unregister(hdmi->audio_pdev);
692
693	hdmi4_cec_uninit(&hdmi->core);
694	hdmi_pll_uninit(&hdmi->pll);
695}
696
697static const struct component_ops hdmi4_component_ops = {
698	.bind	= hdmi4_bind,
699	.unbind	= hdmi4_unbind,
700};
701
702/* -----------------------------------------------------------------------------
703 * Probe & Remove, Suspend & Resume
704 */
705
706static int hdmi4_init_output(struct omap_hdmi *hdmi)
707{
708	struct omap_dss_device *out = &hdmi->output;
709	int r;
710
711	hdmi4_bridge_init(hdmi);
712
713	out->dev = &hdmi->pdev->dev;
714	out->id = OMAP_DSS_OUTPUT_HDMI;
715	out->type = OMAP_DISPLAY_TYPE_HDMI;
716	out->name = "hdmi.0";
717	out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
718	out->of_port = 0;
719
720	r = omapdss_device_init_output(out, &hdmi->bridge);
721	if (r < 0) {
722		hdmi4_bridge_cleanup(hdmi);
723		return r;
724	}
725
726	omapdss_device_register(out);
727
728	return 0;
729}
730
731static void hdmi4_uninit_output(struct omap_hdmi *hdmi)
732{
733	struct omap_dss_device *out = &hdmi->output;
734
735	omapdss_device_unregister(out);
736	omapdss_device_cleanup_output(out);
737
738	hdmi4_bridge_cleanup(hdmi);
739}
740
741static int hdmi4_probe_of(struct omap_hdmi *hdmi)
742{
743	struct platform_device *pdev = hdmi->pdev;
744	struct device_node *node = pdev->dev.of_node;
745	struct device_node *ep;
746	int r;
747
748	ep = of_graph_get_endpoint_by_regs(node, 0, 0);
749	if (!ep)
750		return 0;
751
752	r = hdmi_parse_lanes_of(pdev, ep, &hdmi->phy);
753	of_node_put(ep);
754	return r;
755}
756
757static int hdmi4_probe(struct platform_device *pdev)
758{
759	struct omap_hdmi *hdmi;
760	int irq;
761	int r;
762
763	hdmi = devm_drm_bridge_alloc(&pdev->dev, struct omap_hdmi, bridge, &hdmi4_bridge_funcs);
764	if (IS_ERR(hdmi))
765		return PTR_ERR(hdmi);
766
767	hdmi->pdev = pdev;
768
769	dev_set_drvdata(&pdev->dev, hdmi);
770
771	mutex_init(&hdmi->lock);
772	spin_lock_init(&hdmi->audio_playing_lock);
773
774	r = hdmi4_probe_of(hdmi);
775	if (r)
776		return r;
777
778	r = hdmi_wp_init(pdev, &hdmi->wp, 4);
779	if (r)
780		return r;
781
782	r = hdmi_phy_init(pdev, &hdmi->phy, 4);
783	if (r)
784		return r;
785
786	r = hdmi4_core_init(pdev, &hdmi->core);
787	if (r)
788		return r;
789
790	irq = platform_get_irq(pdev, 0);
791	if (irq < 0) {
792		DSSERR("platform_get_irq failed\n");
793		return -ENODEV;
794	}
795
796	r = devm_request_threaded_irq(&pdev->dev, irq,
797			NULL, hdmi_irq_handler,
798			IRQF_ONESHOT, "OMAP HDMI", hdmi);
799	if (r) {
800		DSSERR("HDMI IRQ request failed\n");
801		return r;
802	}
803
804	hdmi->vdda_reg = devm_regulator_get(&pdev->dev, "vdda");
805	if (IS_ERR(hdmi->vdda_reg)) {
806		r = PTR_ERR(hdmi->vdda_reg);
807		if (r != -EPROBE_DEFER)
808			DSSERR("can't get VDDA regulator\n");
809		return r;
810	}
811
812	pm_runtime_enable(&pdev->dev);
813
814	r = hdmi4_init_output(hdmi);
815	if (r)
816		goto err_pm_disable;
817
818	r = component_add(&pdev->dev, &hdmi4_component_ops);
819	if (r)
820		goto err_uninit_output;
821
822	return 0;
823
824err_uninit_output:
825	hdmi4_uninit_output(hdmi);
826err_pm_disable:
827	pm_runtime_disable(&pdev->dev);
828	return r;
829}
830
831static void hdmi4_remove(struct platform_device *pdev)
832{
833	struct omap_hdmi *hdmi = platform_get_drvdata(pdev);
834
835	component_del(&pdev->dev, &hdmi4_component_ops);
836
837	hdmi4_uninit_output(hdmi);
838
839	pm_runtime_disable(&pdev->dev);
840}
841
842static const struct of_device_id hdmi_of_match[] = {
843	{ .compatible = "ti,omap4-hdmi", },
844	{},
845};
846
847struct platform_driver omapdss_hdmi4hw_driver = {
848	.probe		= hdmi4_probe,
849	.remove		= hdmi4_remove,
850	.driver         = {
851		.name   = "omapdss_hdmi",
852		.of_match_table = hdmi_of_match,
853		.suppress_bind_attrs = true,
854	},
855};