xref: /linux/sound/soc/codecs/hdac_hda.c (revision 08b7174fb8d126e607e385e34b9e1da4f3be274f) 
1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright(c) 2015-18 Intel Corporation.
3 
4 /*
5  * hdac_hda.c - ASoC extensions to reuse the legacy HDA codec drivers
6  * with ASoC platform drivers. These APIs are called by the legacy HDA
7  * codec drivers using hdac_ext_bus_ops ops.
8  */
9 
10 #include <linux/firmware.h>
11 #include <linux/init.h>
12 #include <linux/delay.h>
13 #include <linux/module.h>
14 #include <linux/pm_runtime.h>
15 #include <sound/pcm_params.h>
16 #include <sound/soc.h>
17 #include <sound/hdaudio_ext.h>
18 #include <sound/hda_i915.h>
19 #include <sound/hda_codec.h>
20 #include <sound/hda_register.h>
21 
22 #include "hdac_hda.h"
23 
24 #define STUB_FORMATS	(SNDRV_PCM_FMTBIT_S8 | \
25 			SNDRV_PCM_FMTBIT_U8 | \
26 			SNDRV_PCM_FMTBIT_S16_LE | \
27 			SNDRV_PCM_FMTBIT_U16_LE | \
28 			SNDRV_PCM_FMTBIT_S24_LE | \
29 			SNDRV_PCM_FMTBIT_U24_LE | \
30 			SNDRV_PCM_FMTBIT_S32_LE | \
31 			SNDRV_PCM_FMTBIT_U32_LE | \
32 			SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
33 
34 #define STUB_HDMI_RATES	(SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
35 				 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
36 				 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |\
37 				 SNDRV_PCM_RATE_192000)
38 
39 #ifdef CONFIG_SND_HDA_PATCH_LOADER
40 static char *loadable_patch[HDA_MAX_CODECS];
41 
42 module_param_array_named(patch, loadable_patch, charp, NULL, 0444);
43 MODULE_PARM_DESC(patch, "Patch file array for Intel HD audio interface. The array index is the codec address.");
44 #endif
45 
46 static int hdac_hda_dai_open(struct snd_pcm_substream *substream,
47 			     struct snd_soc_dai *dai);
48 static void hdac_hda_dai_close(struct snd_pcm_substream *substream,
49 			       struct snd_soc_dai *dai);
50 static int hdac_hda_dai_prepare(struct snd_pcm_substream *substream,
51 				struct snd_soc_dai *dai);
52 static int hdac_hda_dai_hw_params(struct snd_pcm_substream *substream,
53 				  struct snd_pcm_hw_params *params,
54 				  struct snd_soc_dai *dai);
55 static int hdac_hda_dai_hw_free(struct snd_pcm_substream *substream,
56 				struct snd_soc_dai *dai);
57 static int hdac_hda_dai_set_stream(struct snd_soc_dai *dai, void *stream,
58 				   int direction);
59 static struct hda_pcm *snd_soc_find_pcm_from_dai(struct hdac_hda_priv *hda_pvt,
60 						 struct snd_soc_dai *dai);
61 
62 static const struct snd_soc_dai_ops hdac_hda_dai_ops = {
63 	.startup = hdac_hda_dai_open,
64 	.shutdown = hdac_hda_dai_close,
65 	.prepare = hdac_hda_dai_prepare,
66 	.hw_params = hdac_hda_dai_hw_params,
67 	.hw_free = hdac_hda_dai_hw_free,
68 	.set_stream = hdac_hda_dai_set_stream,
69 };
70 
71 static struct snd_soc_dai_driver hdac_hda_dais[] = {
72 {
73 	.id = HDAC_ANALOG_DAI_ID,
74 	.name = "Analog Codec DAI",
75 	.ops = &hdac_hda_dai_ops,
76 	.playback = {
77 		.stream_name	= "Analog Codec Playback",
78 		.channels_min	= 1,
79 		.channels_max	= 16,
80 		.rates		= SNDRV_PCM_RATE_8000_192000,
81 		.formats	= STUB_FORMATS,
82 		.sig_bits	= 24,
83 	},
84 	.capture = {
85 		.stream_name    = "Analog Codec Capture",
86 		.channels_min   = 1,
87 		.channels_max   = 16,
88 		.rates = SNDRV_PCM_RATE_8000_192000,
89 		.formats = STUB_FORMATS,
90 		.sig_bits = 24,
91 	},
92 },
93 {
94 	.id = HDAC_DIGITAL_DAI_ID,
95 	.name = "Digital Codec DAI",
96 	.ops = &hdac_hda_dai_ops,
97 	.playback = {
98 		.stream_name    = "Digital Codec Playback",
99 		.channels_min   = 1,
100 		.channels_max   = 16,
101 		.rates          = SNDRV_PCM_RATE_8000_192000,
102 		.formats        = STUB_FORMATS,
103 		.sig_bits = 24,
104 	},
105 	.capture = {
106 		.stream_name    = "Digital Codec Capture",
107 		.channels_min   = 1,
108 		.channels_max   = 16,
109 		.rates = SNDRV_PCM_RATE_8000_192000,
110 		.formats = STUB_FORMATS,
111 		.sig_bits = 24,
112 	},
113 },
114 {
115 	.id = HDAC_ALT_ANALOG_DAI_ID,
116 	.name = "Alt Analog Codec DAI",
117 	.ops = &hdac_hda_dai_ops,
118 	.playback = {
119 		.stream_name	= "Alt Analog Codec Playback",
120 		.channels_min	= 1,
121 		.channels_max	= 16,
122 		.rates		= SNDRV_PCM_RATE_8000_192000,
123 		.formats	= STUB_FORMATS,
124 		.sig_bits	= 24,
125 	},
126 	.capture = {
127 		.stream_name    = "Alt Analog Codec Capture",
128 		.channels_min   = 1,
129 		.channels_max   = 16,
130 		.rates = SNDRV_PCM_RATE_8000_192000,
131 		.formats = STUB_FORMATS,
132 		.sig_bits = 24,
133 	},
134 },
135 {
136 	.id = HDAC_HDMI_0_DAI_ID,
137 	.name = "intel-hdmi-hifi1",
138 	.ops = &hdac_hda_dai_ops,
139 	.playback = {
140 		.stream_name    = "hifi1",
141 		.channels_min   = 1,
142 		.channels_max   = 32,
143 		.rates          = STUB_HDMI_RATES,
144 		.formats        = STUB_FORMATS,
145 		.sig_bits = 24,
146 	},
147 },
148 {
149 	.id = HDAC_HDMI_1_DAI_ID,
150 	.name = "intel-hdmi-hifi2",
151 	.ops = &hdac_hda_dai_ops,
152 	.playback = {
153 		.stream_name    = "hifi2",
154 		.channels_min   = 1,
155 		.channels_max   = 32,
156 		.rates          = STUB_HDMI_RATES,
157 		.formats        = STUB_FORMATS,
158 		.sig_bits = 24,
159 	},
160 },
161 {
162 	.id = HDAC_HDMI_2_DAI_ID,
163 	.name = "intel-hdmi-hifi3",
164 	.ops = &hdac_hda_dai_ops,
165 	.playback = {
166 		.stream_name    = "hifi3",
167 		.channels_min   = 1,
168 		.channels_max   = 32,
169 		.rates          = STUB_HDMI_RATES,
170 		.formats        = STUB_FORMATS,
171 		.sig_bits = 24,
172 	},
173 },
174 {
175 	.id = HDAC_HDMI_3_DAI_ID,
176 	.name = "intel-hdmi-hifi4",
177 	.ops = &hdac_hda_dai_ops,
178 	.playback = {
179 		.stream_name    = "hifi4",
180 		.channels_min   = 1,
181 		.channels_max   = 32,
182 		.rates          = STUB_HDMI_RATES,
183 		.formats        = STUB_FORMATS,
184 		.sig_bits = 24,
185 	},
186 },
187 
188 };
189 
190 static int hdac_hda_dai_set_stream(struct snd_soc_dai *dai,
191 				   void *stream, int direction)
192 {
193 	struct snd_soc_component *component = dai->component;
194 	struct hdac_hda_priv *hda_pvt;
195 	struct hdac_hda_pcm *pcm;
196 	struct hdac_stream *hstream;
197 
198 	if (!stream)
199 		return -EINVAL;
200 
201 	hda_pvt = snd_soc_component_get_drvdata(component);
202 	pcm = &hda_pvt->pcm[dai->id];
203 	hstream = (struct hdac_stream *)stream;
204 
205 	pcm->stream_tag[direction] = hstream->stream_tag;
206 
207 	return 0;
208 }
209 
210 static int hdac_hda_dai_hw_params(struct snd_pcm_substream *substream,
211 				  struct snd_pcm_hw_params *params,
212 				  struct snd_soc_dai *dai)
213 {
214 	struct snd_soc_component *component = dai->component;
215 	struct hdac_hda_priv *hda_pvt;
216 	unsigned int format_val;
217 	unsigned int maxbps;
218 
219 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
220 		maxbps = dai->driver->playback.sig_bits;
221 	else
222 		maxbps = dai->driver->capture.sig_bits;
223 
224 	hda_pvt = snd_soc_component_get_drvdata(component);
225 	format_val = snd_hdac_calc_stream_format(params_rate(params),
226 						 params_channels(params),
227 						 params_format(params),
228 						 maxbps,
229 						 0);
230 	if (!format_val) {
231 		dev_err(dai->dev,
232 			"invalid format_val, rate=%d, ch=%d, format=%d, maxbps=%d\n",
233 			params_rate(params), params_channels(params),
234 			params_format(params), maxbps);
235 
236 		return -EINVAL;
237 	}
238 
239 	hda_pvt->pcm[dai->id].format_val[substream->stream] = format_val;
240 	return 0;
241 }
242 
243 static int hdac_hda_dai_hw_free(struct snd_pcm_substream *substream,
244 				struct snd_soc_dai *dai)
245 {
246 	struct snd_soc_component *component = dai->component;
247 	struct hdac_hda_priv *hda_pvt;
248 	struct hda_pcm_stream *hda_stream;
249 	struct hda_pcm *pcm;
250 
251 	hda_pvt = snd_soc_component_get_drvdata(component);
252 	pcm = snd_soc_find_pcm_from_dai(hda_pvt, dai);
253 	if (!pcm)
254 		return -EINVAL;
255 
256 	hda_stream = &pcm->stream[substream->stream];
257 	snd_hda_codec_cleanup(hda_pvt->codec, hda_stream, substream);
258 
259 	return 0;
260 }
261 
262 static int hdac_hda_dai_prepare(struct snd_pcm_substream *substream,
263 				struct snd_soc_dai *dai)
264 {
265 	struct snd_soc_component *component = dai->component;
266 	struct hda_pcm_stream *hda_stream;
267 	struct hdac_hda_priv *hda_pvt;
268 	struct hdac_device *hdev;
269 	unsigned int format_val;
270 	struct hda_pcm *pcm;
271 	unsigned int stream;
272 	int ret = 0;
273 
274 	hda_pvt = snd_soc_component_get_drvdata(component);
275 	hdev = &hda_pvt->codec->core;
276 	pcm = snd_soc_find_pcm_from_dai(hda_pvt, dai);
277 	if (!pcm)
278 		return -EINVAL;
279 
280 	hda_stream = &pcm->stream[substream->stream];
281 
282 	stream = hda_pvt->pcm[dai->id].stream_tag[substream->stream];
283 	format_val = hda_pvt->pcm[dai->id].format_val[substream->stream];
284 
285 	ret = snd_hda_codec_prepare(hda_pvt->codec, hda_stream,
286 				    stream, format_val, substream);
287 	if (ret < 0)
288 		dev_err(&hdev->dev, "codec prepare failed %d\n", ret);
289 
290 	return ret;
291 }
292 
293 static int hdac_hda_dai_open(struct snd_pcm_substream *substream,
294 			     struct snd_soc_dai *dai)
295 {
296 	struct snd_soc_component *component = dai->component;
297 	struct hdac_hda_priv *hda_pvt;
298 	struct hda_pcm_stream *hda_stream;
299 	struct hda_pcm *pcm;
300 
301 	hda_pvt = snd_soc_component_get_drvdata(component);
302 	pcm = snd_soc_find_pcm_from_dai(hda_pvt, dai);
303 	if (!pcm)
304 		return -EINVAL;
305 
306 	snd_hda_codec_pcm_get(pcm);
307 
308 	hda_stream = &pcm->stream[substream->stream];
309 
310 	return hda_stream->ops.open(hda_stream, hda_pvt->codec, substream);
311 }
312 
313 static void hdac_hda_dai_close(struct snd_pcm_substream *substream,
314 			       struct snd_soc_dai *dai)
315 {
316 	struct snd_soc_component *component = dai->component;
317 	struct hdac_hda_priv *hda_pvt;
318 	struct hda_pcm_stream *hda_stream;
319 	struct hda_pcm *pcm;
320 
321 	hda_pvt = snd_soc_component_get_drvdata(component);
322 	pcm = snd_soc_find_pcm_from_dai(hda_pvt, dai);
323 	if (!pcm)
324 		return;
325 
326 	hda_stream = &pcm->stream[substream->stream];
327 
328 	hda_stream->ops.close(hda_stream, hda_pvt->codec, substream);
329 
330 	snd_hda_codec_pcm_put(pcm);
331 }
332 
333 static struct hda_pcm *snd_soc_find_pcm_from_dai(struct hdac_hda_priv *hda_pvt,
334 						 struct snd_soc_dai *dai)
335 {
336 	struct hda_codec *hcodec = hda_pvt->codec;
337 	struct hda_pcm *cpcm;
338 	const char *pcm_name;
339 
340 	/*
341 	 * map DAI ID to the closest matching PCM name, using the naming
342 	 * scheme used by hda-codec snd_hda_gen_build_pcms() and for
343 	 * HDMI in hda_codec patch_hdmi.c)
344 	 */
345 
346 	switch (dai->id) {
347 	case HDAC_ANALOG_DAI_ID:
348 		pcm_name = "Analog";
349 		break;
350 	case HDAC_DIGITAL_DAI_ID:
351 		pcm_name = "Digital";
352 		break;
353 	case HDAC_ALT_ANALOG_DAI_ID:
354 		pcm_name = "Alt Analog";
355 		break;
356 	case HDAC_HDMI_0_DAI_ID:
357 		pcm_name = "HDMI 0";
358 		break;
359 	case HDAC_HDMI_1_DAI_ID:
360 		pcm_name = "HDMI 1";
361 		break;
362 	case HDAC_HDMI_2_DAI_ID:
363 		pcm_name = "HDMI 2";
364 		break;
365 	case HDAC_HDMI_3_DAI_ID:
366 		pcm_name = "HDMI 3";
367 		break;
368 	default:
369 		dev_err(&hcodec->core.dev, "invalid dai id %d\n", dai->id);
370 		return NULL;
371 	}
372 
373 	list_for_each_entry(cpcm, &hcodec->pcm_list_head, list) {
374 		if (strstr(cpcm->name, pcm_name)) {
375 			if (strcmp(pcm_name, "Analog") == 0) {
376 				if (strstr(cpcm->name, "Alt Analog"))
377 					continue;
378 			}
379 			return cpcm;
380 		}
381 	}
382 
383 	dev_err(&hcodec->core.dev, "didn't find PCM for DAI %s\n", dai->name);
384 	return NULL;
385 }
386 
387 static bool is_hdmi_codec(struct hda_codec *hcodec)
388 {
389 	struct hda_pcm *cpcm;
390 
391 	list_for_each_entry(cpcm, &hcodec->pcm_list_head, list) {
392 		if (cpcm->pcm_type == HDA_PCM_TYPE_HDMI)
393 			return true;
394 	}
395 
396 	return false;
397 }
398 
399 static int hdac_hda_codec_probe(struct snd_soc_component *component)
400 {
401 	struct hdac_hda_priv *hda_pvt =
402 			snd_soc_component_get_drvdata(component);
403 	struct snd_soc_dapm_context *dapm =
404 			snd_soc_component_get_dapm(component);
405 	struct hdac_device *hdev = &hda_pvt->codec->core;
406 	struct hda_codec *hcodec = hda_pvt->codec;
407 	struct hdac_ext_link *hlink;
408 	hda_codec_patch_t patch;
409 	int ret;
410 
411 	hlink = snd_hdac_ext_bus_get_hlink_by_name(hdev->bus, dev_name(&hdev->dev));
412 	if (!hlink) {
413 		dev_err(&hdev->dev, "hdac link not found\n");
414 		return -EIO;
415 	}
416 
417 	snd_hdac_ext_bus_link_get(hdev->bus, hlink);
418 
419 	/*
420 	 * Ensure any HDA display is powered at codec probe.
421 	 * After snd_hda_codec_device_new(), display power is
422 	 * managed by runtime PM.
423 	 */
424 	if (hda_pvt->need_display_power)
425 		snd_hdac_display_power(hdev->bus,
426 				       HDA_CODEC_IDX_CONTROLLER, true);
427 
428 	ret = snd_hda_codec_device_new(hcodec->bus, component->card->snd_card,
429 				       hdev->addr, hcodec, true);
430 	if (ret < 0) {
431 		dev_err(&hdev->dev, "failed to create hda codec %d\n", ret);
432 		goto error_no_pm;
433 	}
434 
435 #ifdef CONFIG_SND_HDA_PATCH_LOADER
436 	if (loadable_patch[hda_pvt->dev_index] && *loadable_patch[hda_pvt->dev_index]) {
437 		const struct firmware *fw;
438 
439 		dev_info(&hdev->dev, "Applying patch firmware '%s'\n",
440 			 loadable_patch[hda_pvt->dev_index]);
441 		ret = request_firmware(&fw, loadable_patch[hda_pvt->dev_index],
442 				       &hdev->dev);
443 		if (ret < 0)
444 			goto error_no_pm;
445 		if (fw) {
446 			ret = snd_hda_load_patch(hcodec->bus, fw->size, fw->data);
447 			if (ret < 0) {
448 				dev_err(&hdev->dev, "failed to load hda patch %d\n", ret);
449 				goto error_no_pm;
450 			}
451 			release_firmware(fw);
452 		}
453 	}
454 #endif
455 	/*
456 	 * Overwrite type to HDA_DEV_ASOC since it is a ASoC driver
457 	 * hda_codec.c will check this flag to determine if unregister
458 	 * device is needed.
459 	 */
460 	hdev->type = HDA_DEV_ASOC;
461 
462 	/*
463 	 * snd_hda_codec_device_new decrements the usage count so call get pm
464 	 * else the device will be powered off
465 	 */
466 	pm_runtime_get_noresume(&hdev->dev);
467 
468 	hcodec->bus->card = dapm->card->snd_card;
469 
470 	ret = snd_hda_codec_set_name(hcodec, hcodec->preset->name);
471 	if (ret < 0) {
472 		dev_err(&hdev->dev, "name failed %s\n", hcodec->preset->name);
473 		goto error_pm;
474 	}
475 
476 	ret = snd_hdac_regmap_init(&hcodec->core);
477 	if (ret < 0) {
478 		dev_err(&hdev->dev, "regmap init failed\n");
479 		goto error_pm;
480 	}
481 
482 	patch = (hda_codec_patch_t)hcodec->preset->driver_data;
483 	if (patch) {
484 		ret = patch(hcodec);
485 		if (ret < 0) {
486 			dev_err(&hdev->dev, "patch failed %d\n", ret);
487 			goto error_regmap;
488 		}
489 	} else {
490 		dev_dbg(&hdev->dev, "no patch file found\n");
491 	}
492 
493 	ret = snd_hda_codec_parse_pcms(hcodec);
494 	if (ret < 0) {
495 		dev_err(&hdev->dev, "unable to map pcms to dai %d\n", ret);
496 		goto error_patch;
497 	}
498 
499 	/* HDMI controls need to be created in machine drivers */
500 	if (!is_hdmi_codec(hcodec)) {
501 		ret = snd_hda_codec_build_controls(hcodec);
502 		if (ret < 0) {
503 			dev_err(&hdev->dev, "unable to create controls %d\n",
504 				ret);
505 			goto error_patch;
506 		}
507 	}
508 
509 	hcodec->core.lazy_cache = true;
510 
511 	if (hda_pvt->need_display_power)
512 		snd_hdac_display_power(hdev->bus,
513 				       HDA_CODEC_IDX_CONTROLLER, false);
514 
515 	/* match for forbid call in snd_hda_codec_device_new() */
516 	pm_runtime_allow(&hdev->dev);
517 
518 	/*
519 	 * hdac_device core already sets the state to active and calls
520 	 * get_noresume. So enable runtime and set the device to suspend.
521 	 * pm_runtime_enable is also called during codec registeration
522 	 */
523 	pm_runtime_put(&hdev->dev);
524 	pm_runtime_suspend(&hdev->dev);
525 
526 	return 0;
527 
528 error_patch:
529 	if (hcodec->patch_ops.free)
530 		hcodec->patch_ops.free(hcodec);
531 error_regmap:
532 	snd_hdac_regmap_exit(hdev);
533 error_pm:
534 	pm_runtime_put(&hdev->dev);
535 error_no_pm:
536 	snd_hdac_ext_bus_link_put(hdev->bus, hlink);
537 	return ret;
538 }
539 
540 static void hdac_hda_codec_remove(struct snd_soc_component *component)
541 {
542 	struct hdac_hda_priv *hda_pvt =
543 		      snd_soc_component_get_drvdata(component);
544 	struct hdac_device *hdev = &hda_pvt->codec->core;
545 	struct hda_codec *codec = hda_pvt->codec;
546 	struct hdac_ext_link *hlink = NULL;
547 
548 	hlink = snd_hdac_ext_bus_get_hlink_by_name(hdev->bus, dev_name(&hdev->dev));
549 	if (!hlink) {
550 		dev_err(&hdev->dev, "hdac link not found\n");
551 		return;
552 	}
553 
554 	pm_runtime_disable(&hdev->dev);
555 	snd_hdac_ext_bus_link_put(hdev->bus, hlink);
556 
557 	if (codec->patch_ops.free)
558 		codec->patch_ops.free(codec);
559 
560 	snd_hda_codec_cleanup_for_unbind(codec);
561 }
562 
563 static const struct snd_soc_dapm_route hdac_hda_dapm_routes[] = {
564 	{"AIF1TX", NULL, "Codec Input Pin1"},
565 	{"AIF2TX", NULL, "Codec Input Pin2"},
566 	{"AIF3TX", NULL, "Codec Input Pin3"},
567 
568 	{"Codec Output Pin1", NULL, "AIF1RX"},
569 	{"Codec Output Pin2", NULL, "AIF2RX"},
570 	{"Codec Output Pin3", NULL, "AIF3RX"},
571 };
572 
573 static const struct snd_soc_dapm_widget hdac_hda_dapm_widgets[] = {
574 	/* Audio Interface */
575 	SND_SOC_DAPM_AIF_IN("AIF1RX", "Analog Codec Playback", 0,
576 			    SND_SOC_NOPM, 0, 0),
577 	SND_SOC_DAPM_AIF_IN("AIF2RX", "Digital Codec Playback", 0,
578 			    SND_SOC_NOPM, 0, 0),
579 	SND_SOC_DAPM_AIF_IN("AIF3RX", "Alt Analog Codec Playback", 0,
580 			    SND_SOC_NOPM, 0, 0),
581 	SND_SOC_DAPM_AIF_OUT("AIF1TX", "Analog Codec Capture", 0,
582 			     SND_SOC_NOPM, 0, 0),
583 	SND_SOC_DAPM_AIF_OUT("AIF2TX", "Digital Codec Capture", 0,
584 			     SND_SOC_NOPM, 0, 0),
585 	SND_SOC_DAPM_AIF_OUT("AIF3TX", "Alt Analog Codec Capture", 0,
586 			     SND_SOC_NOPM, 0, 0),
587 
588 	/* Input Pins */
589 	SND_SOC_DAPM_INPUT("Codec Input Pin1"),
590 	SND_SOC_DAPM_INPUT("Codec Input Pin2"),
591 	SND_SOC_DAPM_INPUT("Codec Input Pin3"),
592 
593 	/* Output Pins */
594 	SND_SOC_DAPM_OUTPUT("Codec Output Pin1"),
595 	SND_SOC_DAPM_OUTPUT("Codec Output Pin2"),
596 	SND_SOC_DAPM_OUTPUT("Codec Output Pin3"),
597 };
598 
599 static const struct snd_soc_component_driver hdac_hda_codec = {
600 	.probe			= hdac_hda_codec_probe,
601 	.remove			= hdac_hda_codec_remove,
602 	.dapm_widgets		= hdac_hda_dapm_widgets,
603 	.num_dapm_widgets	= ARRAY_SIZE(hdac_hda_dapm_widgets),
604 	.dapm_routes		= hdac_hda_dapm_routes,
605 	.num_dapm_routes	= ARRAY_SIZE(hdac_hda_dapm_routes),
606 	.idle_bias_on		= false,
607 	.endianness		= 1,
608 };
609 
610 static int hdac_hda_dev_probe(struct hdac_device *hdev)
611 {
612 	struct hdac_ext_link *hlink;
613 	int ret;
614 
615 	/* hold the ref while we probe */
616 	hlink = snd_hdac_ext_bus_get_hlink_by_name(hdev->bus, dev_name(&hdev->dev));
617 	if (!hlink) {
618 		dev_err(&hdev->dev, "hdac link not found\n");
619 		return -EIO;
620 	}
621 	snd_hdac_ext_bus_link_get(hdev->bus, hlink);
622 
623 	/* ASoC specific initialization */
624 	ret = devm_snd_soc_register_component(&hdev->dev,
625 					 &hdac_hda_codec, hdac_hda_dais,
626 					 ARRAY_SIZE(hdac_hda_dais));
627 	if (ret < 0) {
628 		dev_err(&hdev->dev, "failed to register HDA codec %d\n", ret);
629 		return ret;
630 	}
631 
632 	snd_hdac_ext_bus_link_put(hdev->bus, hlink);
633 
634 	return ret;
635 }
636 
637 static int hdac_hda_dev_remove(struct hdac_device *hdev)
638 {
639 	/*
640 	 * Resources are freed in hdac_hda_codec_remove(). This
641 	 * function is kept to keep hda_codec_driver_remove() happy.
642 	 */
643 	return 0;
644 }
645 
646 static struct hdac_ext_bus_ops hdac_ops = {
647 	.hdev_attach = hdac_hda_dev_probe,
648 	.hdev_detach = hdac_hda_dev_remove,
649 };
650 
651 struct hdac_ext_bus_ops *snd_soc_hdac_hda_get_ops(void)
652 {
653 	return &hdac_ops;
654 }
655 EXPORT_SYMBOL_GPL(snd_soc_hdac_hda_get_ops);
656 
657 MODULE_LICENSE("GPL v2");
658 MODULE_DESCRIPTION("ASoC Extensions for legacy HDA Drivers");
659 MODULE_AUTHOR("Rakesh Ughreja<rakesh.a.ughreja@intel.com>");
660