xref: /openbmc/linux/drivers/gpu/drm/msm/hdmi/hdmi.c (revision 715f23b6)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2014 The Linux Foundation. All rights reserved.
4  * Copyright (C) 2013 Red Hat
5  * Author: Rob Clark <robdclark@gmail.com>
6  */
7 
8 #include <linux/of_irq.h>
9 #include <linux/of_gpio.h>
10 
11 #include <sound/hdmi-codec.h>
12 #include "hdmi.h"
13 
14 void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on)
15 {
16 	uint32_t ctrl = 0;
17 	unsigned long flags;
18 
19 	spin_lock_irqsave(&hdmi->reg_lock, flags);
20 	if (power_on) {
21 		ctrl |= HDMI_CTRL_ENABLE;
22 		if (!hdmi->hdmi_mode) {
23 			ctrl |= HDMI_CTRL_HDMI;
24 			hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
25 			ctrl &= ~HDMI_CTRL_HDMI;
26 		} else {
27 			ctrl |= HDMI_CTRL_HDMI;
28 		}
29 	} else {
30 		ctrl = HDMI_CTRL_HDMI;
31 	}
32 
33 	hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
34 	spin_unlock_irqrestore(&hdmi->reg_lock, flags);
35 	DBG("HDMI Core: %s, HDMI_CTRL=0x%08x",
36 			power_on ? "Enable" : "Disable", ctrl);
37 }
38 
39 static irqreturn_t msm_hdmi_irq(int irq, void *dev_id)
40 {
41 	struct hdmi *hdmi = dev_id;
42 
43 	/* Process HPD: */
44 	msm_hdmi_connector_irq(hdmi->connector);
45 
46 	/* Process DDC: */
47 	msm_hdmi_i2c_irq(hdmi->i2c);
48 
49 	/* Process HDCP: */
50 	if (hdmi->hdcp_ctrl)
51 		msm_hdmi_hdcp_irq(hdmi->hdcp_ctrl);
52 
53 	/* TODO audio.. */
54 
55 	return IRQ_HANDLED;
56 }
57 
58 static void msm_hdmi_destroy(struct hdmi *hdmi)
59 {
60 	/*
61 	 * at this point, hpd has been disabled,
62 	 * after flush workq, it's safe to deinit hdcp
63 	 */
64 	if (hdmi->workq) {
65 		flush_workqueue(hdmi->workq);
66 		destroy_workqueue(hdmi->workq);
67 	}
68 	msm_hdmi_hdcp_destroy(hdmi);
69 
70 	if (hdmi->phy_dev) {
71 		put_device(hdmi->phy_dev);
72 		hdmi->phy = NULL;
73 		hdmi->phy_dev = NULL;
74 	}
75 
76 	if (hdmi->i2c)
77 		msm_hdmi_i2c_destroy(hdmi->i2c);
78 
79 	platform_set_drvdata(hdmi->pdev, NULL);
80 }
81 
82 static int msm_hdmi_get_phy(struct hdmi *hdmi)
83 {
84 	struct platform_device *pdev = hdmi->pdev;
85 	struct platform_device *phy_pdev;
86 	struct device_node *phy_node;
87 
88 	phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0);
89 	if (!phy_node) {
90 		DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n");
91 		return -ENXIO;
92 	}
93 
94 	phy_pdev = of_find_device_by_node(phy_node);
95 	if (phy_pdev)
96 		hdmi->phy = platform_get_drvdata(phy_pdev);
97 
98 	of_node_put(phy_node);
99 
100 	if (!phy_pdev || !hdmi->phy) {
101 		DRM_DEV_ERROR(&pdev->dev, "phy driver is not ready\n");
102 		return -EPROBE_DEFER;
103 	}
104 
105 	hdmi->phy_dev = get_device(&phy_pdev->dev);
106 
107 	return 0;
108 }
109 
110 /* construct hdmi at bind/probe time, grab all the resources.  If
111  * we are to EPROBE_DEFER we want to do it here, rather than later
112  * at modeset_init() time
113  */
114 static struct hdmi *msm_hdmi_init(struct platform_device *pdev)
115 {
116 	struct hdmi_platform_config *config = pdev->dev.platform_data;
117 	struct hdmi *hdmi = NULL;
118 	struct resource *res;
119 	int i, ret;
120 
121 	hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
122 	if (!hdmi) {
123 		ret = -ENOMEM;
124 		goto fail;
125 	}
126 
127 	hdmi->pdev = pdev;
128 	hdmi->config = config;
129 	spin_lock_init(&hdmi->reg_lock);
130 
131 	hdmi->mmio = msm_ioremap(pdev, config->mmio_name, "HDMI");
132 	if (IS_ERR(hdmi->mmio)) {
133 		ret = PTR_ERR(hdmi->mmio);
134 		goto fail;
135 	}
136 
137 	/* HDCP needs physical address of hdmi register */
138 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
139 		config->mmio_name);
140 	hdmi->mmio_phy_addr = res->start;
141 
142 	hdmi->qfprom_mmio = msm_ioremap(pdev,
143 		config->qfprom_mmio_name, "HDMI_QFPROM");
144 	if (IS_ERR(hdmi->qfprom_mmio)) {
145 		DRM_DEV_INFO(&pdev->dev, "can't find qfprom resource\n");
146 		hdmi->qfprom_mmio = NULL;
147 	}
148 
149 	hdmi->hpd_regs = devm_kcalloc(&pdev->dev,
150 				      config->hpd_reg_cnt,
151 				      sizeof(hdmi->hpd_regs[0]),
152 				      GFP_KERNEL);
153 	if (!hdmi->hpd_regs) {
154 		ret = -ENOMEM;
155 		goto fail;
156 	}
157 	for (i = 0; i < config->hpd_reg_cnt; i++) {
158 		struct regulator *reg;
159 
160 		reg = devm_regulator_get(&pdev->dev,
161 				config->hpd_reg_names[i]);
162 		if (IS_ERR(reg)) {
163 			ret = PTR_ERR(reg);
164 			DRM_DEV_ERROR(&pdev->dev, "failed to get hpd regulator: %s (%d)\n",
165 					config->hpd_reg_names[i], ret);
166 			goto fail;
167 		}
168 
169 		hdmi->hpd_regs[i] = reg;
170 	}
171 
172 	hdmi->pwr_regs = devm_kcalloc(&pdev->dev,
173 				      config->pwr_reg_cnt,
174 				      sizeof(hdmi->pwr_regs[0]),
175 				      GFP_KERNEL);
176 	if (!hdmi->pwr_regs) {
177 		ret = -ENOMEM;
178 		goto fail;
179 	}
180 	for (i = 0; i < config->pwr_reg_cnt; i++) {
181 		struct regulator *reg;
182 
183 		reg = devm_regulator_get(&pdev->dev,
184 				config->pwr_reg_names[i]);
185 		if (IS_ERR(reg)) {
186 			ret = PTR_ERR(reg);
187 			DRM_DEV_ERROR(&pdev->dev, "failed to get pwr regulator: %s (%d)\n",
188 					config->pwr_reg_names[i], ret);
189 			goto fail;
190 		}
191 
192 		hdmi->pwr_regs[i] = reg;
193 	}
194 
195 	hdmi->hpd_clks = devm_kcalloc(&pdev->dev,
196 				      config->hpd_clk_cnt,
197 				      sizeof(hdmi->hpd_clks[0]),
198 				      GFP_KERNEL);
199 	if (!hdmi->hpd_clks) {
200 		ret = -ENOMEM;
201 		goto fail;
202 	}
203 	for (i = 0; i < config->hpd_clk_cnt; i++) {
204 		struct clk *clk;
205 
206 		clk = msm_clk_get(pdev, config->hpd_clk_names[i]);
207 		if (IS_ERR(clk)) {
208 			ret = PTR_ERR(clk);
209 			DRM_DEV_ERROR(&pdev->dev, "failed to get hpd clk: %s (%d)\n",
210 					config->hpd_clk_names[i], ret);
211 			goto fail;
212 		}
213 
214 		hdmi->hpd_clks[i] = clk;
215 	}
216 
217 	hdmi->pwr_clks = devm_kcalloc(&pdev->dev,
218 				      config->pwr_clk_cnt,
219 				      sizeof(hdmi->pwr_clks[0]),
220 				      GFP_KERNEL);
221 	if (!hdmi->pwr_clks) {
222 		ret = -ENOMEM;
223 		goto fail;
224 	}
225 	for (i = 0; i < config->pwr_clk_cnt; i++) {
226 		struct clk *clk;
227 
228 		clk = msm_clk_get(pdev, config->pwr_clk_names[i]);
229 		if (IS_ERR(clk)) {
230 			ret = PTR_ERR(clk);
231 			DRM_DEV_ERROR(&pdev->dev, "failed to get pwr clk: %s (%d)\n",
232 					config->pwr_clk_names[i], ret);
233 			goto fail;
234 		}
235 
236 		hdmi->pwr_clks[i] = clk;
237 	}
238 
239 	pm_runtime_enable(&pdev->dev);
240 
241 	hdmi->workq = alloc_ordered_workqueue("msm_hdmi", 0);
242 
243 	hdmi->i2c = msm_hdmi_i2c_init(hdmi);
244 	if (IS_ERR(hdmi->i2c)) {
245 		ret = PTR_ERR(hdmi->i2c);
246 		DRM_DEV_ERROR(&pdev->dev, "failed to get i2c: %d\n", ret);
247 		hdmi->i2c = NULL;
248 		goto fail;
249 	}
250 
251 	ret = msm_hdmi_get_phy(hdmi);
252 	if (ret) {
253 		DRM_DEV_ERROR(&pdev->dev, "failed to get phy\n");
254 		goto fail;
255 	}
256 
257 	hdmi->hdcp_ctrl = msm_hdmi_hdcp_init(hdmi);
258 	if (IS_ERR(hdmi->hdcp_ctrl)) {
259 		dev_warn(&pdev->dev, "failed to init hdcp: disabled\n");
260 		hdmi->hdcp_ctrl = NULL;
261 	}
262 
263 	return hdmi;
264 
265 fail:
266 	if (hdmi)
267 		msm_hdmi_destroy(hdmi);
268 
269 	return ERR_PTR(ret);
270 }
271 
272 /* Second part of initialization, the drm/kms level modeset_init,
273  * constructs/initializes mode objects, etc, is called from master
274  * driver (not hdmi sub-device's probe/bind!)
275  *
276  * Any resource (regulator/clk/etc) which could be missing at boot
277  * should be handled in msm_hdmi_init() so that failure happens from
278  * hdmi sub-device's probe.
279  */
280 int msm_hdmi_modeset_init(struct hdmi *hdmi,
281 		struct drm_device *dev, struct drm_encoder *encoder)
282 {
283 	struct msm_drm_private *priv = dev->dev_private;
284 	struct platform_device *pdev = hdmi->pdev;
285 	int ret;
286 
287 	hdmi->dev = dev;
288 	hdmi->encoder = encoder;
289 
290 	hdmi_audio_infoframe_init(&hdmi->audio.infoframe);
291 
292 	hdmi->bridge = msm_hdmi_bridge_init(hdmi);
293 	if (IS_ERR(hdmi->bridge)) {
294 		ret = PTR_ERR(hdmi->bridge);
295 		DRM_DEV_ERROR(dev->dev, "failed to create HDMI bridge: %d\n", ret);
296 		hdmi->bridge = NULL;
297 		goto fail;
298 	}
299 
300 	hdmi->connector = msm_hdmi_connector_init(hdmi);
301 	if (IS_ERR(hdmi->connector)) {
302 		ret = PTR_ERR(hdmi->connector);
303 		DRM_DEV_ERROR(dev->dev, "failed to create HDMI connector: %d\n", ret);
304 		hdmi->connector = NULL;
305 		goto fail;
306 	}
307 
308 	hdmi->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
309 	if (hdmi->irq < 0) {
310 		ret = hdmi->irq;
311 		DRM_DEV_ERROR(dev->dev, "failed to get irq: %d\n", ret);
312 		goto fail;
313 	}
314 
315 	ret = devm_request_irq(&pdev->dev, hdmi->irq,
316 			msm_hdmi_irq, IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
317 			"hdmi_isr", hdmi);
318 	if (ret < 0) {
319 		DRM_DEV_ERROR(dev->dev, "failed to request IRQ%u: %d\n",
320 				hdmi->irq, ret);
321 		goto fail;
322 	}
323 
324 	ret = msm_hdmi_hpd_enable(hdmi->connector);
325 	if (ret < 0) {
326 		DRM_DEV_ERROR(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret);
327 		goto fail;
328 	}
329 
330 	ret = drm_bridge_attach(encoder, hdmi->bridge, NULL);
331 	if (ret)
332 		goto fail;
333 
334 	priv->bridges[priv->num_bridges++]       = hdmi->bridge;
335 	priv->connectors[priv->num_connectors++] = hdmi->connector;
336 
337 	platform_set_drvdata(pdev, hdmi);
338 
339 	return 0;
340 
341 fail:
342 	/* bridge is normally destroyed by drm: */
343 	if (hdmi->bridge) {
344 		msm_hdmi_bridge_destroy(hdmi->bridge);
345 		hdmi->bridge = NULL;
346 	}
347 	if (hdmi->connector) {
348 		hdmi->connector->funcs->destroy(hdmi->connector);
349 		hdmi->connector = NULL;
350 	}
351 
352 	return ret;
353 }
354 
355 /*
356  * The hdmi device:
357  */
358 
359 #define HDMI_CFG(item, entry) \
360 	.item ## _names = item ##_names_ ## entry, \
361 	.item ## _cnt   = ARRAY_SIZE(item ## _names_ ## entry)
362 
363 static const char *pwr_reg_names_none[] = {};
364 static const char *hpd_reg_names_none[] = {};
365 
366 static struct hdmi_platform_config hdmi_tx_8660_config;
367 
368 static const char *hpd_reg_names_8960[] = {"core-vdda", "hdmi-mux"};
369 static const char *hpd_clk_names_8960[] = {"core", "master_iface", "slave_iface"};
370 
371 static struct hdmi_platform_config hdmi_tx_8960_config = {
372 		HDMI_CFG(hpd_reg, 8960),
373 		HDMI_CFG(hpd_clk, 8960),
374 };
375 
376 static const char *pwr_reg_names_8x74[] = {"core-vdda", "core-vcc"};
377 static const char *hpd_reg_names_8x74[] = {"hpd-gdsc", "hpd-5v"};
378 static const char *pwr_clk_names_8x74[] = {"extp", "alt_iface"};
379 static const char *hpd_clk_names_8x74[] = {"iface", "core", "mdp_core"};
380 static unsigned long hpd_clk_freq_8x74[] = {0, 19200000, 0};
381 
382 static struct hdmi_platform_config hdmi_tx_8974_config = {
383 		HDMI_CFG(pwr_reg, 8x74),
384 		HDMI_CFG(hpd_reg, 8x74),
385 		HDMI_CFG(pwr_clk, 8x74),
386 		HDMI_CFG(hpd_clk, 8x74),
387 		.hpd_freq      = hpd_clk_freq_8x74,
388 };
389 
390 static const char *hpd_reg_names_8084[] = {"hpd-gdsc", "hpd-5v", "hpd-5v-en"};
391 
392 static struct hdmi_platform_config hdmi_tx_8084_config = {
393 		HDMI_CFG(pwr_reg, 8x74),
394 		HDMI_CFG(hpd_reg, 8084),
395 		HDMI_CFG(pwr_clk, 8x74),
396 		HDMI_CFG(hpd_clk, 8x74),
397 		.hpd_freq      = hpd_clk_freq_8x74,
398 };
399 
400 static struct hdmi_platform_config hdmi_tx_8994_config = {
401 		HDMI_CFG(pwr_reg, 8x74),
402 		HDMI_CFG(hpd_reg, none),
403 		HDMI_CFG(pwr_clk, 8x74),
404 		HDMI_CFG(hpd_clk, 8x74),
405 		.hpd_freq      = hpd_clk_freq_8x74,
406 };
407 
408 static struct hdmi_platform_config hdmi_tx_8996_config = {
409 		HDMI_CFG(pwr_reg, none),
410 		HDMI_CFG(hpd_reg, none),
411 		HDMI_CFG(pwr_clk, 8x74),
412 		HDMI_CFG(hpd_clk, 8x74),
413 		.hpd_freq      = hpd_clk_freq_8x74,
414 };
415 
416 static const struct {
417 	const char *name;
418 	const bool output;
419 	const int value;
420 	const char *label;
421 } msm_hdmi_gpio_pdata[] = {
422 	{ "qcom,hdmi-tx-ddc-clk", true, 1, "HDMI_DDC_CLK" },
423 	{ "qcom,hdmi-tx-ddc-data", true, 1, "HDMI_DDC_DATA" },
424 	{ "qcom,hdmi-tx-hpd", false, 1, "HDMI_HPD" },
425 	{ "qcom,hdmi-tx-mux-en", true, 1, "HDMI_MUX_EN" },
426 	{ "qcom,hdmi-tx-mux-sel", true, 0, "HDMI_MUX_SEL" },
427 	{ "qcom,hdmi-tx-mux-lpm", true, 1, "HDMI_MUX_LPM" },
428 };
429 
430 /*
431  * HDMI audio codec callbacks
432  */
433 static int msm_hdmi_audio_hw_params(struct device *dev, void *data,
434 				    struct hdmi_codec_daifmt *daifmt,
435 				    struct hdmi_codec_params *params)
436 {
437 	struct hdmi *hdmi = dev_get_drvdata(dev);
438 	unsigned int chan;
439 	unsigned int channel_allocation = 0;
440 	unsigned int rate;
441 	unsigned int level_shift  = 0; /* 0dB */
442 	bool down_mix = false;
443 
444 	DRM_DEV_DEBUG(dev, "%u Hz, %d bit, %d channels\n", params->sample_rate,
445 		 params->sample_width, params->cea.channels);
446 
447 	switch (params->cea.channels) {
448 	case 2:
449 		/* FR and FL speakers */
450 		channel_allocation  = 0;
451 		chan = MSM_HDMI_AUDIO_CHANNEL_2;
452 		break;
453 	case 4:
454 		/* FC, LFE, FR and FL speakers */
455 		channel_allocation  = 0x3;
456 		chan = MSM_HDMI_AUDIO_CHANNEL_4;
457 		break;
458 	case 6:
459 		/* RR, RL, FC, LFE, FR and FL speakers */
460 		channel_allocation  = 0x0B;
461 		chan = MSM_HDMI_AUDIO_CHANNEL_6;
462 		break;
463 	case 8:
464 		/* FRC, FLC, RR, RL, FC, LFE, FR and FL speakers */
465 		channel_allocation  = 0x1F;
466 		chan = MSM_HDMI_AUDIO_CHANNEL_8;
467 		break;
468 	default:
469 		return -EINVAL;
470 	}
471 
472 	switch (params->sample_rate) {
473 	case 32000:
474 		rate = HDMI_SAMPLE_RATE_32KHZ;
475 		break;
476 	case 44100:
477 		rate = HDMI_SAMPLE_RATE_44_1KHZ;
478 		break;
479 	case 48000:
480 		rate = HDMI_SAMPLE_RATE_48KHZ;
481 		break;
482 	case 88200:
483 		rate = HDMI_SAMPLE_RATE_88_2KHZ;
484 		break;
485 	case 96000:
486 		rate = HDMI_SAMPLE_RATE_96KHZ;
487 		break;
488 	case 176400:
489 		rate = HDMI_SAMPLE_RATE_176_4KHZ;
490 		break;
491 	case 192000:
492 		rate = HDMI_SAMPLE_RATE_192KHZ;
493 		break;
494 	default:
495 		DRM_DEV_ERROR(dev, "rate[%d] not supported!\n",
496 			params->sample_rate);
497 		return -EINVAL;
498 	}
499 
500 	msm_hdmi_audio_set_sample_rate(hdmi, rate);
501 	msm_hdmi_audio_info_setup(hdmi, 1, chan, channel_allocation,
502 			      level_shift, down_mix);
503 
504 	return 0;
505 }
506 
507 static void msm_hdmi_audio_shutdown(struct device *dev, void *data)
508 {
509 	struct hdmi *hdmi = dev_get_drvdata(dev);
510 
511 	msm_hdmi_audio_info_setup(hdmi, 0, 0, 0, 0, 0);
512 }
513 
514 static const struct hdmi_codec_ops msm_hdmi_audio_codec_ops = {
515 	.hw_params = msm_hdmi_audio_hw_params,
516 	.audio_shutdown = msm_hdmi_audio_shutdown,
517 };
518 
519 static struct hdmi_codec_pdata codec_data = {
520 	.ops = &msm_hdmi_audio_codec_ops,
521 	.max_i2s_channels = 8,
522 	.i2s = 1,
523 };
524 
525 static int msm_hdmi_register_audio_driver(struct hdmi *hdmi, struct device *dev)
526 {
527 	hdmi->audio_pdev = platform_device_register_data(dev,
528 							 HDMI_CODEC_DRV_NAME,
529 							 PLATFORM_DEVID_AUTO,
530 							 &codec_data,
531 							 sizeof(codec_data));
532 	return PTR_ERR_OR_ZERO(hdmi->audio_pdev);
533 }
534 
535 static int msm_hdmi_bind(struct device *dev, struct device *master, void *data)
536 {
537 	struct drm_device *drm = dev_get_drvdata(master);
538 	struct msm_drm_private *priv = drm->dev_private;
539 	struct hdmi_platform_config *hdmi_cfg;
540 	struct hdmi *hdmi;
541 	struct device_node *of_node = dev->of_node;
542 	int i, err;
543 
544 	hdmi_cfg = (struct hdmi_platform_config *)
545 			of_device_get_match_data(dev);
546 	if (!hdmi_cfg) {
547 		DRM_DEV_ERROR(dev, "unknown hdmi_cfg: %pOFn\n", of_node);
548 		return -ENXIO;
549 	}
550 
551 	hdmi_cfg->mmio_name     = "core_physical";
552 	hdmi_cfg->qfprom_mmio_name = "qfprom_physical";
553 
554 	for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) {
555 		const char *name = msm_hdmi_gpio_pdata[i].name;
556 		struct gpio_desc *gpiod;
557 
558 		/*
559 		 * We are fetching the GPIO lines "as is" since the connector
560 		 * code is enabling and disabling the lines. Until that point
561 		 * the power-on default value will be kept.
562 		 */
563 		gpiod = devm_gpiod_get_optional(dev, name, GPIOD_ASIS);
564 		/* This will catch e.g. -PROBE_DEFER */
565 		if (IS_ERR(gpiod))
566 			return PTR_ERR(gpiod);
567 		if (!gpiod) {
568 			/* Try a second time, stripping down the name */
569 			char name3[32];
570 
571 			/*
572 			 * Try again after stripping out the "qcom,hdmi-tx"
573 			 * prefix. This is mainly to match "hpd-gpios" used
574 			 * in the upstream bindings.
575 			 */
576 			if (sscanf(name, "qcom,hdmi-tx-%s", name3))
577 				gpiod = devm_gpiod_get_optional(dev, name3, GPIOD_ASIS);
578 			if (IS_ERR(gpiod))
579 				return PTR_ERR(gpiod);
580 			if (!gpiod)
581 				DBG("failed to get gpio: %s", name);
582 		}
583 		hdmi_cfg->gpios[i].gpiod = gpiod;
584 		if (gpiod)
585 			gpiod_set_consumer_name(gpiod, msm_hdmi_gpio_pdata[i].label);
586 		hdmi_cfg->gpios[i].output = msm_hdmi_gpio_pdata[i].output;
587 		hdmi_cfg->gpios[i].value = msm_hdmi_gpio_pdata[i].value;
588 	}
589 
590 	dev->platform_data = hdmi_cfg;
591 
592 	hdmi = msm_hdmi_init(to_platform_device(dev));
593 	if (IS_ERR(hdmi))
594 		return PTR_ERR(hdmi);
595 	priv->hdmi = hdmi;
596 
597 	err = msm_hdmi_register_audio_driver(hdmi, dev);
598 	if (err) {
599 		DRM_ERROR("Failed to attach an audio codec %d\n", err);
600 		hdmi->audio_pdev = NULL;
601 	}
602 
603 	return 0;
604 }
605 
606 static void msm_hdmi_unbind(struct device *dev, struct device *master,
607 		void *data)
608 {
609 	struct drm_device *drm = dev_get_drvdata(master);
610 	struct msm_drm_private *priv = drm->dev_private;
611 	if (priv->hdmi) {
612 		if (priv->hdmi->audio_pdev)
613 			platform_device_unregister(priv->hdmi->audio_pdev);
614 
615 		msm_hdmi_destroy(priv->hdmi);
616 		priv->hdmi = NULL;
617 	}
618 }
619 
620 static const struct component_ops msm_hdmi_ops = {
621 		.bind   = msm_hdmi_bind,
622 		.unbind = msm_hdmi_unbind,
623 };
624 
625 static int msm_hdmi_dev_probe(struct platform_device *pdev)
626 {
627 	return component_add(&pdev->dev, &msm_hdmi_ops);
628 }
629 
630 static int msm_hdmi_dev_remove(struct platform_device *pdev)
631 {
632 	component_del(&pdev->dev, &msm_hdmi_ops);
633 	return 0;
634 }
635 
636 static const struct of_device_id msm_hdmi_dt_match[] = {
637 	{ .compatible = "qcom,hdmi-tx-8996", .data = &hdmi_tx_8996_config },
638 	{ .compatible = "qcom,hdmi-tx-8994", .data = &hdmi_tx_8994_config },
639 	{ .compatible = "qcom,hdmi-tx-8084", .data = &hdmi_tx_8084_config },
640 	{ .compatible = "qcom,hdmi-tx-8974", .data = &hdmi_tx_8974_config },
641 	{ .compatible = "qcom,hdmi-tx-8960", .data = &hdmi_tx_8960_config },
642 	{ .compatible = "qcom,hdmi-tx-8660", .data = &hdmi_tx_8660_config },
643 	{}
644 };
645 
646 static struct platform_driver msm_hdmi_driver = {
647 	.probe = msm_hdmi_dev_probe,
648 	.remove = msm_hdmi_dev_remove,
649 	.driver = {
650 		.name = "hdmi_msm",
651 		.of_match_table = msm_hdmi_dt_match,
652 	},
653 };
654 
655 void __init msm_hdmi_register(void)
656 {
657 	msm_hdmi_phy_driver_register();
658 	platform_driver_register(&msm_hdmi_driver);
659 }
660 
661 void __exit msm_hdmi_unregister(void)
662 {
663 	platform_driver_unregister(&msm_hdmi_driver);
664 	msm_hdmi_phy_driver_unregister();
665 }
666