xref: /openbmc/linux/sound/soc/codecs/hdmi-codec.c (revision e2d413f9)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * ALSA SoC codec for HDMI encoder drivers
4  * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
5  * Author: Jyri Sarha <jsarha@ti.com>
6  */
7 #include <linux/module.h>
8 #include <linux/string.h>
9 #include <sound/core.h>
10 #include <sound/jack.h>
11 #include <sound/pcm.h>
12 #include <sound/pcm_params.h>
13 #include <sound/soc.h>
14 #include <sound/tlv.h>
15 #include <sound/pcm_drm_eld.h>
16 #include <sound/hdmi-codec.h>
17 #include <sound/pcm_iec958.h>
18 
19 #include <drm/drm_crtc.h> /* This is only to get MAX_ELD_BYTES */
20 
21 #define HDMI_CODEC_CHMAP_IDX_UNKNOWN  -1
22 
23 struct hdmi_codec_channel_map_table {
24 	unsigned char map;	/* ALSA API channel map position */
25 	unsigned long spk_mask;		/* speaker position bit mask */
26 };
27 
28 /*
29  * CEA speaker placement for HDMI 1.4:
30  *
31  *  FL  FLC   FC   FRC   FR   FRW
32  *
33  *                                  LFE
34  *
35  *  RL  RLC   RC   RRC   RR
36  *
37  *  Speaker placement has to be extended to support HDMI 2.0
38  */
39 enum hdmi_codec_cea_spk_placement {
40 	FL  = BIT(0),	/* Front Left           */
41 	FC  = BIT(1),	/* Front Center         */
42 	FR  = BIT(2),	/* Front Right          */
43 	FLC = BIT(3),	/* Front Left Center    */
44 	FRC = BIT(4),	/* Front Right Center   */
45 	RL  = BIT(5),	/* Rear Left            */
46 	RC  = BIT(6),	/* Rear Center          */
47 	RR  = BIT(7),	/* Rear Right           */
48 	RLC = BIT(8),	/* Rear Left Center     */
49 	RRC = BIT(9),	/* Rear Right Center    */
50 	LFE = BIT(10),	/* Low Frequency Effect */
51 };
52 
53 /*
54  * cea Speaker allocation structure
55  */
56 struct hdmi_codec_cea_spk_alloc {
57 	const int ca_id;
58 	unsigned int n_ch;
59 	unsigned long mask;
60 };
61 
62 /* Channel maps  stereo HDMI */
63 static const struct snd_pcm_chmap_elem hdmi_codec_stereo_chmaps[] = {
64 	{ .channels = 2,
65 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
66 	{ }
67 };
68 
69 /* Channel maps for multi-channel playbacks, up to 8 n_ch */
70 static const struct snd_pcm_chmap_elem hdmi_codec_8ch_chmaps[] = {
71 	{ .channels = 2, /* CA_ID 0x00 */
72 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
73 	{ .channels = 4, /* CA_ID 0x01 */
74 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
75 		   SNDRV_CHMAP_NA } },
76 	{ .channels = 4, /* CA_ID 0x02 */
77 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
78 		   SNDRV_CHMAP_FC } },
79 	{ .channels = 4, /* CA_ID 0x03 */
80 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
81 		   SNDRV_CHMAP_FC } },
82 	{ .channels = 6, /* CA_ID 0x04 */
83 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
84 		   SNDRV_CHMAP_NA, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
85 	{ .channels = 6, /* CA_ID 0x05 */
86 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
87 		   SNDRV_CHMAP_NA, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
88 	{ .channels = 6, /* CA_ID 0x06 */
89 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
90 		   SNDRV_CHMAP_FC, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
91 	{ .channels = 6, /* CA_ID 0x07 */
92 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
93 		   SNDRV_CHMAP_FC, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
94 	{ .channels = 6, /* CA_ID 0x08 */
95 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
96 		   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
97 	{ .channels = 6, /* CA_ID 0x09 */
98 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
99 		   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
100 	{ .channels = 6, /* CA_ID 0x0A */
101 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
102 		   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
103 	{ .channels = 6, /* CA_ID 0x0B */
104 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
105 		   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
106 	{ .channels = 8, /* CA_ID 0x0C */
107 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
108 		   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
109 		   SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
110 	{ .channels = 8, /* CA_ID 0x0D */
111 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
112 		   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
113 		   SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
114 	{ .channels = 8, /* CA_ID 0x0E */
115 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
116 		   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
117 		   SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
118 	{ .channels = 8, /* CA_ID 0x0F */
119 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
120 		   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
121 		   SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
122 	{ .channels = 8, /* CA_ID 0x10 */
123 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
124 		   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
125 		   SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
126 	{ .channels = 8, /* CA_ID 0x11 */
127 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
128 		   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
129 		   SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
130 	{ .channels = 8, /* CA_ID 0x12 */
131 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
132 		   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
133 		   SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
134 	{ .channels = 8, /* CA_ID 0x13 */
135 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
136 		   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
137 		   SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
138 	{ .channels = 8, /* CA_ID 0x14 */
139 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
140 		   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
141 		   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
142 	{ .channels = 8, /* CA_ID 0x15 */
143 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
144 		   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
145 		   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
146 	{ .channels = 8, /* CA_ID 0x16 */
147 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
148 		   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
149 		   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
150 	{ .channels = 8, /* CA_ID 0x17 */
151 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
152 		   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
153 		   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
154 	{ .channels = 8, /* CA_ID 0x18 */
155 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
156 		   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
157 		   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
158 	{ .channels = 8, /* CA_ID 0x19 */
159 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
160 		   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
161 		   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
162 	{ .channels = 8, /* CA_ID 0x1A */
163 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
164 		   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
165 		   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
166 	{ .channels = 8, /* CA_ID 0x1B */
167 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
168 		   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
169 		   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
170 	{ .channels = 8, /* CA_ID 0x1C */
171 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
172 		   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
173 		   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
174 	{ .channels = 8, /* CA_ID 0x1D */
175 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
176 		   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
177 		   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
178 	{ .channels = 8, /* CA_ID 0x1E */
179 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
180 		   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
181 		   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
182 	{ .channels = 8, /* CA_ID 0x1F */
183 	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
184 		   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
185 		   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
186 	{ }
187 };
188 
189 /*
190  * hdmi_codec_channel_alloc: speaker configuration available for CEA
191  *
192  * This is an ordered list that must match with hdmi_codec_8ch_chmaps struct
193  * The preceding ones have better chances to be selected by
194  * hdmi_codec_get_ch_alloc_table_idx().
195  */
196 static const struct hdmi_codec_cea_spk_alloc hdmi_codec_channel_alloc[] = {
197 	{ .ca_id = 0x00, .n_ch = 2,
198 	  .mask = FL | FR},
199 	/* 2.1 */
200 	{ .ca_id = 0x01, .n_ch = 4,
201 	  .mask = FL | FR | LFE},
202 	/* Dolby Surround */
203 	{ .ca_id = 0x02, .n_ch = 4,
204 	  .mask = FL | FR | FC },
205 	/* surround51 */
206 	{ .ca_id = 0x0b, .n_ch = 6,
207 	  .mask = FL | FR | LFE | FC | RL | RR},
208 	/* surround40 */
209 	{ .ca_id = 0x08, .n_ch = 6,
210 	  .mask = FL | FR | RL | RR },
211 	/* surround41 */
212 	{ .ca_id = 0x09, .n_ch = 6,
213 	  .mask = FL | FR | LFE | RL | RR },
214 	/* surround50 */
215 	{ .ca_id = 0x0a, .n_ch = 6,
216 	  .mask = FL | FR | FC | RL | RR },
217 	/* 6.1 */
218 	{ .ca_id = 0x0f, .n_ch = 8,
219 	  .mask = FL | FR | LFE | FC | RL | RR | RC },
220 	/* surround71 */
221 	{ .ca_id = 0x13, .n_ch = 8,
222 	  .mask = FL | FR | LFE | FC | RL | RR | RLC | RRC },
223 	/* others */
224 	{ .ca_id = 0x03, .n_ch = 8,
225 	  .mask = FL | FR | LFE | FC },
226 	{ .ca_id = 0x04, .n_ch = 8,
227 	  .mask = FL | FR | RC},
228 	{ .ca_id = 0x05, .n_ch = 8,
229 	  .mask = FL | FR | LFE | RC },
230 	{ .ca_id = 0x06, .n_ch = 8,
231 	  .mask = FL | FR | FC | RC },
232 	{ .ca_id = 0x07, .n_ch = 8,
233 	  .mask = FL | FR | LFE | FC | RC },
234 	{ .ca_id = 0x0c, .n_ch = 8,
235 	  .mask = FL | FR | RC | RL | RR },
236 	{ .ca_id = 0x0d, .n_ch = 8,
237 	  .mask = FL | FR | LFE | RL | RR | RC },
238 	{ .ca_id = 0x0e, .n_ch = 8,
239 	  .mask = FL | FR | FC | RL | RR | RC },
240 	{ .ca_id = 0x10, .n_ch = 8,
241 	  .mask = FL | FR | RL | RR | RLC | RRC },
242 	{ .ca_id = 0x11, .n_ch = 8,
243 	  .mask = FL | FR | LFE | RL | RR | RLC | RRC },
244 	{ .ca_id = 0x12, .n_ch = 8,
245 	  .mask = FL | FR | FC | RL | RR | RLC | RRC },
246 	{ .ca_id = 0x14, .n_ch = 8,
247 	  .mask = FL | FR | FLC | FRC },
248 	{ .ca_id = 0x15, .n_ch = 8,
249 	  .mask = FL | FR | LFE | FLC | FRC },
250 	{ .ca_id = 0x16, .n_ch = 8,
251 	  .mask = FL | FR | FC | FLC | FRC },
252 	{ .ca_id = 0x17, .n_ch = 8,
253 	  .mask = FL | FR | LFE | FC | FLC | FRC },
254 	{ .ca_id = 0x18, .n_ch = 8,
255 	  .mask = FL | FR | RC | FLC | FRC },
256 	{ .ca_id = 0x19, .n_ch = 8,
257 	  .mask = FL | FR | LFE | RC | FLC | FRC },
258 	{ .ca_id = 0x1a, .n_ch = 8,
259 	  .mask = FL | FR | RC | FC | FLC | FRC },
260 	{ .ca_id = 0x1b, .n_ch = 8,
261 	  .mask = FL | FR | LFE | RC | FC | FLC | FRC },
262 	{ .ca_id = 0x1c, .n_ch = 8,
263 	  .mask = FL | FR | RL | RR | FLC | FRC },
264 	{ .ca_id = 0x1d, .n_ch = 8,
265 	  .mask = FL | FR | LFE | RL | RR | FLC | FRC },
266 	{ .ca_id = 0x1e, .n_ch = 8,
267 	  .mask = FL | FR | FC | RL | RR | FLC | FRC },
268 	{ .ca_id = 0x1f, .n_ch = 8,
269 	  .mask = FL | FR | LFE | FC | RL | RR | FLC | FRC },
270 };
271 
272 struct hdmi_codec_priv {
273 	struct hdmi_codec_pdata hcd;
274 	uint8_t eld[MAX_ELD_BYTES];
275 	struct snd_pcm_chmap *chmap_info;
276 	unsigned int chmap_idx;
277 	struct mutex lock;
278 	bool busy;
279 	struct snd_soc_jack *jack;
280 	unsigned int jack_status;
281 };
282 
283 static const struct snd_soc_dapm_widget hdmi_widgets[] = {
284 	SND_SOC_DAPM_OUTPUT("TX"),
285 };
286 
287 enum {
288 	DAI_ID_I2S = 0,
289 	DAI_ID_SPDIF,
290 };
291 
292 static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol,
293 			     struct snd_ctl_elem_info *uinfo)
294 {
295 	uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
296 	uinfo->count = sizeof_field(struct hdmi_codec_priv, eld);
297 
298 	return 0;
299 }
300 
301 static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
302 			    struct snd_ctl_elem_value *ucontrol)
303 {
304 	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
305 	struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
306 
307 	memcpy(ucontrol->value.bytes.data, hcp->eld, sizeof(hcp->eld));
308 
309 	return 0;
310 }
311 
312 static unsigned long hdmi_codec_spk_mask_from_alloc(int spk_alloc)
313 {
314 	int i;
315 	static const unsigned long hdmi_codec_eld_spk_alloc_bits[] = {
316 		[0] = FL | FR, [1] = LFE, [2] = FC, [3] = RL | RR,
317 		[4] = RC, [5] = FLC | FRC, [6] = RLC | RRC,
318 	};
319 	unsigned long spk_mask = 0;
320 
321 	for (i = 0; i < ARRAY_SIZE(hdmi_codec_eld_spk_alloc_bits); i++) {
322 		if (spk_alloc & (1 << i))
323 			spk_mask |= hdmi_codec_eld_spk_alloc_bits[i];
324 	}
325 
326 	return spk_mask;
327 }
328 
329 static void hdmi_codec_eld_chmap(struct hdmi_codec_priv *hcp)
330 {
331 	u8 spk_alloc;
332 	unsigned long spk_mask;
333 
334 	spk_alloc = drm_eld_get_spk_alloc(hcp->eld);
335 	spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);
336 
337 	/* Detect if only stereo supported, else return 8 channels mappings */
338 	if ((spk_mask & ~(FL | FR)) && hcp->chmap_info->max_channels > 2)
339 		hcp->chmap_info->chmap = hdmi_codec_8ch_chmaps;
340 	else
341 		hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps;
342 }
343 
344 static int hdmi_codec_get_ch_alloc_table_idx(struct hdmi_codec_priv *hcp,
345 					     unsigned char channels)
346 {
347 	int i;
348 	u8 spk_alloc;
349 	unsigned long spk_mask;
350 	const struct hdmi_codec_cea_spk_alloc *cap = hdmi_codec_channel_alloc;
351 
352 	spk_alloc = drm_eld_get_spk_alloc(hcp->eld);
353 	spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);
354 
355 	for (i = 0; i < ARRAY_SIZE(hdmi_codec_channel_alloc); i++, cap++) {
356 		/* If spk_alloc == 0, HDMI is unplugged return stereo config*/
357 		if (!spk_alloc && cap->ca_id == 0)
358 			return i;
359 		if (cap->n_ch != channels)
360 			continue;
361 		if (!(cap->mask == (spk_mask & cap->mask)))
362 			continue;
363 		return i;
364 	}
365 
366 	return -EINVAL;
367 }
368 static int hdmi_codec_chmap_ctl_get(struct snd_kcontrol *kcontrol,
369 			      struct snd_ctl_elem_value *ucontrol)
370 {
371 	unsigned const char *map;
372 	unsigned int i;
373 	struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
374 	struct hdmi_codec_priv *hcp = info->private_data;
375 
376 	map = info->chmap[hcp->chmap_idx].map;
377 
378 	for (i = 0; i < info->max_channels; i++) {
379 		if (hcp->chmap_idx == HDMI_CODEC_CHMAP_IDX_UNKNOWN)
380 			ucontrol->value.integer.value[i] = 0;
381 		else
382 			ucontrol->value.integer.value[i] = map[i];
383 	}
384 
385 	return 0;
386 }
387 
388 static int hdmi_codec_startup(struct snd_pcm_substream *substream,
389 			      struct snd_soc_dai *dai)
390 {
391 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
392 	int ret = 0;
393 
394 	mutex_lock(&hcp->lock);
395 	if (hcp->busy) {
396 		dev_err(dai->dev, "Only one simultaneous stream supported!\n");
397 		mutex_unlock(&hcp->lock);
398 		return -EINVAL;
399 	}
400 
401 	if (hcp->hcd.ops->audio_startup) {
402 		ret = hcp->hcd.ops->audio_startup(dai->dev->parent, hcp->hcd.data);
403 		if (ret)
404 			goto err;
405 	}
406 
407 	if (hcp->hcd.ops->get_eld) {
408 		ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->hcd.data,
409 					    hcp->eld, sizeof(hcp->eld));
410 		if (ret)
411 			goto err;
412 
413 		ret = snd_pcm_hw_constraint_eld(substream->runtime, hcp->eld);
414 		if (ret)
415 			goto err;
416 
417 		/* Select chmap supported */
418 		hdmi_codec_eld_chmap(hcp);
419 	}
420 
421 	hcp->busy = true;
422 
423 err:
424 	mutex_unlock(&hcp->lock);
425 	return ret;
426 }
427 
428 static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
429 				struct snd_soc_dai *dai)
430 {
431 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
432 
433 	hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
434 	hcp->hcd.ops->audio_shutdown(dai->dev->parent, hcp->hcd.data);
435 
436 	mutex_lock(&hcp->lock);
437 	hcp->busy = false;
438 	mutex_unlock(&hcp->lock);
439 }
440 
441 static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
442 				struct snd_pcm_hw_params *params,
443 				struct snd_soc_dai *dai)
444 {
445 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
446 	struct hdmi_codec_daifmt *cf = dai->playback_dma_data;
447 	struct hdmi_codec_params hp = {
448 		.iec = {
449 			.status = { 0 },
450 			.subcode = { 0 },
451 			.pad = 0,
452 			.dig_subframe = { 0 },
453 		}
454 	};
455 	int ret, idx;
456 
457 	dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__,
458 		params_width(params), params_rate(params),
459 		params_channels(params));
460 
461 	ret = snd_pcm_create_iec958_consumer_hw_params(params, hp.iec.status,
462 						       sizeof(hp.iec.status));
463 	if (ret < 0) {
464 		dev_err(dai->dev, "Creating IEC958 channel status failed %d\n",
465 			ret);
466 		return ret;
467 	}
468 
469 	hdmi_audio_infoframe_init(&hp.cea);
470 	hp.cea.channels = params_channels(params);
471 	hp.cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
472 	hp.cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
473 	hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
474 
475 	/* Select a channel allocation that matches with ELD and pcm channels */
476 	idx = hdmi_codec_get_ch_alloc_table_idx(hcp, hp.cea.channels);
477 	if (idx < 0) {
478 		dev_err(dai->dev, "Not able to map channels to speakers (%d)\n",
479 			idx);
480 		hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
481 		return idx;
482 	}
483 	hp.cea.channel_allocation = hdmi_codec_channel_alloc[idx].ca_id;
484 	hcp->chmap_idx = hdmi_codec_channel_alloc[idx].ca_id;
485 
486 	hp.sample_width = params_width(params);
487 	hp.sample_rate = params_rate(params);
488 	hp.channels = params_channels(params);
489 
490 	return hcp->hcd.ops->hw_params(dai->dev->parent, hcp->hcd.data,
491 				       cf, &hp);
492 }
493 
494 static int hdmi_codec_i2s_set_fmt(struct snd_soc_dai *dai,
495 				  unsigned int fmt)
496 {
497 	struct hdmi_codec_daifmt *cf = dai->playback_dma_data;
498 
499 	/* Reset daifmt */
500 	memset(cf, 0, sizeof(*cf));
501 
502 	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
503 	case SND_SOC_DAIFMT_CBM_CFM:
504 		cf->bit_clk_master = 1;
505 		cf->frame_clk_master = 1;
506 		break;
507 	case SND_SOC_DAIFMT_CBS_CFM:
508 		cf->frame_clk_master = 1;
509 		break;
510 	case SND_SOC_DAIFMT_CBM_CFS:
511 		cf->bit_clk_master = 1;
512 		break;
513 	case SND_SOC_DAIFMT_CBS_CFS:
514 		break;
515 	default:
516 		return -EINVAL;
517 	}
518 
519 	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
520 	case SND_SOC_DAIFMT_NB_NF:
521 		break;
522 	case SND_SOC_DAIFMT_NB_IF:
523 		cf->frame_clk_inv = 1;
524 		break;
525 	case SND_SOC_DAIFMT_IB_NF:
526 		cf->bit_clk_inv = 1;
527 		break;
528 	case SND_SOC_DAIFMT_IB_IF:
529 		cf->frame_clk_inv = 1;
530 		cf->bit_clk_inv = 1;
531 		break;
532 	}
533 
534 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
535 	case SND_SOC_DAIFMT_I2S:
536 		cf->fmt = HDMI_I2S;
537 		break;
538 	case SND_SOC_DAIFMT_DSP_A:
539 		cf->fmt = HDMI_DSP_A;
540 		break;
541 	case SND_SOC_DAIFMT_DSP_B:
542 		cf->fmt = HDMI_DSP_B;
543 		break;
544 	case SND_SOC_DAIFMT_RIGHT_J:
545 		cf->fmt = HDMI_RIGHT_J;
546 		break;
547 	case SND_SOC_DAIFMT_LEFT_J:
548 		cf->fmt = HDMI_LEFT_J;
549 		break;
550 	case SND_SOC_DAIFMT_AC97:
551 		cf->fmt = HDMI_AC97;
552 		break;
553 	default:
554 		dev_err(dai->dev, "Invalid DAI interface format\n");
555 		return -EINVAL;
556 	}
557 
558 	return 0;
559 }
560 
561 static int hdmi_codec_digital_mute(struct snd_soc_dai *dai, int mute)
562 {
563 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
564 
565 	if (hcp->hcd.ops->digital_mute)
566 		return hcp->hcd.ops->digital_mute(dai->dev->parent,
567 						  hcp->hcd.data, mute);
568 
569 	return 0;
570 }
571 
572 static const struct snd_soc_dai_ops hdmi_codec_i2s_dai_ops = {
573 	.startup	= hdmi_codec_startup,
574 	.shutdown	= hdmi_codec_shutdown,
575 	.hw_params	= hdmi_codec_hw_params,
576 	.set_fmt	= hdmi_codec_i2s_set_fmt,
577 	.digital_mute	= hdmi_codec_digital_mute,
578 };
579 
580 static const struct snd_soc_dai_ops hdmi_codec_spdif_dai_ops = {
581 	.startup	= hdmi_codec_startup,
582 	.shutdown	= hdmi_codec_shutdown,
583 	.hw_params	= hdmi_codec_hw_params,
584 	.digital_mute	= hdmi_codec_digital_mute,
585 };
586 
587 #define HDMI_RATES	(SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
588 			 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
589 			 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |\
590 			 SNDRV_PCM_RATE_192000)
591 
592 #define SPDIF_FORMATS	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
593 			 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
594 			 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
595 			 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE)
596 
597 /*
598  * This list is only for formats allowed on the I2S bus. So there is
599  * some formats listed that are not supported by HDMI interface. For
600  * instance allowing the 32-bit formats enables 24-precision with CPU
601  * DAIs that do not support 24-bit formats. If the extra formats cause
602  * problems, we should add the video side driver an option to disable
603  * them.
604  */
605 #define I2S_FORMATS	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
606 			 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
607 			 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
608 			 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE |\
609 			 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE)
610 
611 static int hdmi_codec_pcm_new(struct snd_soc_pcm_runtime *rtd,
612 			      struct snd_soc_dai *dai)
613 {
614 	struct snd_soc_dai_driver *drv = dai->driver;
615 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
616 	struct snd_kcontrol *kctl;
617 	struct snd_kcontrol_new hdmi_eld_ctl = {
618 		.access	= SNDRV_CTL_ELEM_ACCESS_READ |
619 			  SNDRV_CTL_ELEM_ACCESS_VOLATILE,
620 		.iface	= SNDRV_CTL_ELEM_IFACE_PCM,
621 		.name	= "ELD",
622 		.info	= hdmi_eld_ctl_info,
623 		.get	= hdmi_eld_ctl_get,
624 		.device	= rtd->pcm->device,
625 	};
626 	int ret;
627 
628 	ret =  snd_pcm_add_chmap_ctls(rtd->pcm, SNDRV_PCM_STREAM_PLAYBACK,
629 				      NULL, drv->playback.channels_max, 0,
630 				      &hcp->chmap_info);
631 	if (ret < 0)
632 		return ret;
633 
634 	/* override handlers */
635 	hcp->chmap_info->private_data = hcp;
636 	hcp->chmap_info->kctl->get = hdmi_codec_chmap_ctl_get;
637 
638 	/* default chmap supported is stereo */
639 	hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps;
640 	hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
641 
642 	/* add ELD ctl with the device number corresponding to the PCM stream */
643 	kctl = snd_ctl_new1(&hdmi_eld_ctl, dai->component);
644 	if (!kctl)
645 		return -ENOMEM;
646 
647 	return snd_ctl_add(rtd->card->snd_card, kctl);
648 }
649 
650 static int hdmi_dai_probe(struct snd_soc_dai *dai)
651 {
652 	struct snd_soc_dapm_context *dapm;
653 	struct hdmi_codec_daifmt *daifmt;
654 	struct snd_soc_dapm_route route = {
655 		.sink = "TX",
656 		.source = dai->driver->playback.stream_name,
657 	};
658 	int ret;
659 
660 	dapm = snd_soc_component_get_dapm(dai->component);
661 	ret = snd_soc_dapm_add_routes(dapm, &route, 1);
662 	if (ret)
663 		return ret;
664 
665 	daifmt = kzalloc(sizeof(*daifmt), GFP_KERNEL);
666 	if (!daifmt)
667 		return -ENOMEM;
668 
669 	dai->playback_dma_data = daifmt;
670 	return 0;
671 }
672 
673 static void hdmi_codec_jack_report(struct hdmi_codec_priv *hcp,
674 				   unsigned int jack_status)
675 {
676 	if (hcp->jack && jack_status != hcp->jack_status) {
677 		snd_soc_jack_report(hcp->jack, jack_status, SND_JACK_LINEOUT);
678 		hcp->jack_status = jack_status;
679 	}
680 }
681 
682 static void plugged_cb(struct device *dev, bool plugged)
683 {
684 	struct hdmi_codec_priv *hcp = dev_get_drvdata(dev);
685 
686 	if (plugged)
687 		hdmi_codec_jack_report(hcp, SND_JACK_LINEOUT);
688 	else
689 		hdmi_codec_jack_report(hcp, 0);
690 }
691 
692 /**
693  * hdmi_codec_set_jack_detect - register HDMI plugged callback
694  * @component: the hdmi-codec instance
695  * @jack: ASoC jack to report (dis)connection events on
696  */
697 int hdmi_codec_set_jack_detect(struct snd_soc_component *component,
698 			       struct snd_soc_jack *jack)
699 {
700 	struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
701 	int ret = -EOPNOTSUPP;
702 
703 	if (hcp->hcd.ops->hook_plugged_cb) {
704 		hcp->jack = jack;
705 		ret = hcp->hcd.ops->hook_plugged_cb(component->dev->parent,
706 						    hcp->hcd.data,
707 						    plugged_cb,
708 						    component->dev);
709 		if (ret)
710 			hcp->jack = NULL;
711 	}
712 	return ret;
713 }
714 EXPORT_SYMBOL_GPL(hdmi_codec_set_jack_detect);
715 
716 static int hdmi_dai_spdif_probe(struct snd_soc_dai *dai)
717 {
718 	struct hdmi_codec_daifmt *cf = dai->playback_dma_data;
719 	int ret;
720 
721 	ret = hdmi_dai_probe(dai);
722 	if (ret)
723 		return ret;
724 
725 	cf = dai->playback_dma_data;
726 	cf->fmt = HDMI_SPDIF;
727 
728 	return 0;
729 }
730 
731 static int hdmi_codec_dai_remove(struct snd_soc_dai *dai)
732 {
733 	kfree(dai->playback_dma_data);
734 	return 0;
735 }
736 
737 static const struct snd_soc_dai_driver hdmi_i2s_dai = {
738 	.name = "i2s-hifi",
739 	.id = DAI_ID_I2S,
740 	.probe = hdmi_dai_probe,
741 	.remove = hdmi_codec_dai_remove,
742 	.playback = {
743 		.stream_name = "I2S Playback",
744 		.channels_min = 2,
745 		.channels_max = 8,
746 		.rates = HDMI_RATES,
747 		.formats = I2S_FORMATS,
748 		.sig_bits = 24,
749 	},
750 	.ops = &hdmi_codec_i2s_dai_ops,
751 	.pcm_new = hdmi_codec_pcm_new,
752 };
753 
754 static const struct snd_soc_dai_driver hdmi_spdif_dai = {
755 	.name = "spdif-hifi",
756 	.id = DAI_ID_SPDIF,
757 	.probe = hdmi_dai_spdif_probe,
758 	.remove = hdmi_codec_dai_remove,
759 	.playback = {
760 		.stream_name = "SPDIF Playback",
761 		.channels_min = 2,
762 		.channels_max = 2,
763 		.rates = HDMI_RATES,
764 		.formats = SPDIF_FORMATS,
765 	},
766 	.ops = &hdmi_codec_spdif_dai_ops,
767 	.pcm_new = hdmi_codec_pcm_new,
768 };
769 
770 static int hdmi_of_xlate_dai_id(struct snd_soc_component *component,
771 				 struct device_node *endpoint)
772 {
773 	struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
774 	int ret = -ENOTSUPP; /* see snd_soc_get_dai_id() */
775 
776 	if (hcp->hcd.ops->get_dai_id)
777 		ret = hcp->hcd.ops->get_dai_id(component, endpoint);
778 
779 	return ret;
780 }
781 
782 static void hdmi_remove(struct snd_soc_component *component)
783 {
784 	struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
785 
786 	if (hcp->hcd.ops->hook_plugged_cb)
787 		hcp->hcd.ops->hook_plugged_cb(component->dev->parent,
788 					      hcp->hcd.data, NULL, NULL);
789 }
790 
791 static const struct snd_soc_component_driver hdmi_driver = {
792 	.remove			= hdmi_remove,
793 	.dapm_widgets		= hdmi_widgets,
794 	.num_dapm_widgets	= ARRAY_SIZE(hdmi_widgets),
795 	.of_xlate_dai_id	= hdmi_of_xlate_dai_id,
796 	.idle_bias_on		= 1,
797 	.use_pmdown_time	= 1,
798 	.endianness		= 1,
799 	.non_legacy_dai_naming	= 1,
800 };
801 
802 static int hdmi_codec_probe(struct platform_device *pdev)
803 {
804 	struct hdmi_codec_pdata *hcd = pdev->dev.platform_data;
805 	struct snd_soc_dai_driver *daidrv;
806 	struct device *dev = &pdev->dev;
807 	struct hdmi_codec_priv *hcp;
808 	int dai_count, i = 0;
809 	int ret;
810 
811 	if (!hcd) {
812 		dev_err(dev, "%s: No platform data\n", __func__);
813 		return -EINVAL;
814 	}
815 
816 	dai_count = hcd->i2s + hcd->spdif;
817 	if (dai_count < 1 || !hcd->ops || !hcd->ops->hw_params ||
818 	    !hcd->ops->audio_shutdown) {
819 		dev_err(dev, "%s: Invalid parameters\n", __func__);
820 		return -EINVAL;
821 	}
822 
823 	hcp = devm_kzalloc(dev, sizeof(*hcp), GFP_KERNEL);
824 	if (!hcp)
825 		return -ENOMEM;
826 
827 	hcp->hcd = *hcd;
828 	mutex_init(&hcp->lock);
829 
830 	daidrv = devm_kcalloc(dev, dai_count, sizeof(*daidrv), GFP_KERNEL);
831 	if (!daidrv)
832 		return -ENOMEM;
833 
834 	if (hcd->i2s) {
835 		daidrv[i] = hdmi_i2s_dai;
836 		daidrv[i].playback.channels_max = hcd->max_i2s_channels;
837 		i++;
838 	}
839 
840 	if (hcd->spdif)
841 		daidrv[i] = hdmi_spdif_dai;
842 
843 	dev_set_drvdata(dev, hcp);
844 
845 	ret = devm_snd_soc_register_component(dev, &hdmi_driver, daidrv,
846 					      dai_count);
847 	if (ret) {
848 		dev_err(dev, "%s: snd_soc_register_component() failed (%d)\n",
849 			__func__, ret);
850 		return ret;
851 	}
852 	return 0;
853 }
854 
855 static struct platform_driver hdmi_codec_driver = {
856 	.driver = {
857 		.name = HDMI_CODEC_DRV_NAME,
858 	},
859 	.probe = hdmi_codec_probe,
860 };
861 
862 module_platform_driver(hdmi_codec_driver);
863 
864 MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
865 MODULE_DESCRIPTION("HDMI Audio Codec Driver");
866 MODULE_LICENSE("GPL");
867 MODULE_ALIAS("platform:" HDMI_CODEC_DRV_NAME);
868