2 * ALSA SoC codec for HDMI encoder drivers
3 * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
4 * Author: Jyri Sarha <jsarha@ti.com>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 #include <linux/module.h>
16 #include <linux/string.h>
17 #include <sound/core.h>
18 #include <sound/pcm.h>
19 #include <sound/pcm_params.h>
20 #include <sound/soc.h>
21 #include <sound/pcm_drm_eld.h>
22 #include <sound/hdmi-codec.h>
23 #include <sound/pcm_iec958.h>
25 #include <drm/drm_crtc.h> /* This is only to get MAX_ELD_BYTES */
27 struct hdmi_codec_priv {
28 struct hdmi_codec_pdata hcd;
29 struct snd_soc_dai_driver *daidrv;
30 struct hdmi_codec_daifmt daifmt[2];
31 struct mutex current_stream_lock;
32 struct snd_pcm_substream *current_stream;
33 struct snd_pcm_hw_constraint_list ratec;
34 uint8_t eld[MAX_ELD_BYTES];
37 static const struct snd_soc_dapm_widget hdmi_widgets[] = {
38 SND_SOC_DAPM_OUTPUT("TX"),
41 static const struct snd_soc_dapm_route hdmi_routes[] = {
42 { "TX", NULL, "Playback" },
50 static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol,
51 struct snd_ctl_elem_info *uinfo)
53 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
54 struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
56 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
57 uinfo->count = sizeof(hcp->eld);
62 static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
63 struct snd_ctl_elem_value *ucontrol)
65 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
66 struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
68 memcpy(ucontrol->value.bytes.data, hcp->eld, sizeof(hcp->eld));
73 static const struct snd_kcontrol_new hdmi_controls[] = {
75 .access = SNDRV_CTL_ELEM_ACCESS_READ |
76 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
77 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
79 .info = hdmi_eld_ctl_info,
80 .get = hdmi_eld_ctl_get,
84 static int hdmi_codec_new_stream(struct snd_pcm_substream *substream,
85 struct snd_soc_dai *dai)
87 struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
90 mutex_lock(&hcp->current_stream_lock);
91 if (!hcp->current_stream) {
92 hcp->current_stream = substream;
93 } else if (hcp->current_stream != substream) {
94 dev_err(dai->dev, "Only one simultaneous stream supported!\n");
97 mutex_unlock(&hcp->current_stream_lock);
102 static int hdmi_codec_startup(struct snd_pcm_substream *substream,
103 struct snd_soc_dai *dai)
105 struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
108 dev_dbg(dai->dev, "%s()\n", __func__);
110 ret = hdmi_codec_new_stream(substream, dai);
114 if (hcp->hcd.ops->audio_startup) {
115 ret = hcp->hcd.ops->audio_startup(dai->dev->parent);
117 mutex_lock(&hcp->current_stream_lock);
118 hcp->current_stream = NULL;
119 mutex_unlock(&hcp->current_stream_lock);
124 if (hcp->hcd.ops->get_eld) {
125 ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->eld,
129 ret = snd_pcm_hw_constraint_eld(substream->runtime,
138 static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
139 struct snd_soc_dai *dai)
141 struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
143 dev_dbg(dai->dev, "%s()\n", __func__);
145 WARN_ON(hcp->current_stream != substream);
147 hcp->hcd.ops->audio_shutdown(dai->dev->parent);
149 mutex_lock(&hcp->current_stream_lock);
150 hcp->current_stream = NULL;
151 mutex_unlock(&hcp->current_stream_lock);
154 static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
155 struct snd_pcm_hw_params *params,
156 struct snd_soc_dai *dai)
158 struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
159 struct hdmi_codec_params hp = {
164 .dig_subframe = { 0 },
169 dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__,
170 params_width(params), params_rate(params),
171 params_channels(params));
173 if (params_width(params) > 24)
176 ret = snd_pcm_create_iec958_consumer_hw_params(params, hp.iec.status,
177 sizeof(hp.iec.status));
179 dev_err(dai->dev, "Creating IEC958 channel status failed %d\n",
184 ret = hdmi_codec_new_stream(substream, dai);
188 hdmi_audio_infoframe_init(&hp.cea);
189 hp.cea.channels = params_channels(params);
190 hp.cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
191 hp.cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
192 hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
194 hp.sample_width = params_width(params);
195 hp.sample_rate = params_rate(params);
196 hp.channels = params_channels(params);
198 return hcp->hcd.ops->hw_params(dai->dev->parent, &hcp->daifmt[dai->id],
202 static int hdmi_codec_set_fmt(struct snd_soc_dai *dai,
205 struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
206 struct hdmi_codec_daifmt cf = { 0 };
209 dev_dbg(dai->dev, "%s()\n", __func__);
211 if (dai->id == DAI_ID_SPDIF) {
214 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
215 case SND_SOC_DAIFMT_CBM_CFM:
216 cf.bit_clk_master = 1;
217 cf.frame_clk_master = 1;
219 case SND_SOC_DAIFMT_CBS_CFM:
220 cf.frame_clk_master = 1;
222 case SND_SOC_DAIFMT_CBM_CFS:
223 cf.bit_clk_master = 1;
225 case SND_SOC_DAIFMT_CBS_CFS:
231 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
232 case SND_SOC_DAIFMT_NB_NF:
234 case SND_SOC_DAIFMT_NB_IF:
235 cf.frame_clk_inv = 1;
237 case SND_SOC_DAIFMT_IB_NF:
240 case SND_SOC_DAIFMT_IB_IF:
241 cf.frame_clk_inv = 1;
246 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
247 case SND_SOC_DAIFMT_I2S:
250 case SND_SOC_DAIFMT_DSP_A:
253 case SND_SOC_DAIFMT_DSP_B:
256 case SND_SOC_DAIFMT_RIGHT_J:
257 cf.fmt = HDMI_RIGHT_J;
259 case SND_SOC_DAIFMT_LEFT_J:
260 cf.fmt = HDMI_LEFT_J;
262 case SND_SOC_DAIFMT_AC97:
266 dev_err(dai->dev, "Invalid DAI interface format\n");
271 hcp->daifmt[dai->id] = cf;
276 static int hdmi_codec_digital_mute(struct snd_soc_dai *dai, int mute)
278 struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
280 dev_dbg(dai->dev, "%s()\n", __func__);
282 if (hcp->hcd.ops->digital_mute)
283 return hcp->hcd.ops->digital_mute(dai->dev->parent, mute);
288 static const struct snd_soc_dai_ops hdmi_dai_ops = {
289 .startup = hdmi_codec_startup,
290 .shutdown = hdmi_codec_shutdown,
291 .hw_params = hdmi_codec_hw_params,
292 .set_fmt = hdmi_codec_set_fmt,
293 .digital_mute = hdmi_codec_digital_mute,
297 #define HDMI_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
298 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
299 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |\
300 SNDRV_PCM_RATE_192000)
302 #define SPDIF_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
303 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
304 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
305 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE)
308 * This list is only for formats allowed on the I2S bus. So there is
309 * some formats listed that are not supported by HDMI interface. For
310 * instance allowing the 32-bit formats enables 24-precision with CPU
311 * DAIs that do not support 24-bit formats. If the extra formats cause
312 * problems, we should add the video side driver an option to disable
315 #define I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
316 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
317 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
318 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE |\
319 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE)
321 static struct snd_soc_dai_driver hdmi_i2s_dai = {
325 .stream_name = "Playback",
329 .formats = I2S_FORMATS,
332 .ops = &hdmi_dai_ops,
335 static const struct snd_soc_dai_driver hdmi_spdif_dai = {
336 .name = "spdif-hifi",
339 .stream_name = "Playback",
343 .formats = SPDIF_FORMATS,
345 .ops = &hdmi_dai_ops,
348 static struct snd_soc_codec_driver hdmi_codec = {
349 .controls = hdmi_controls,
350 .num_controls = ARRAY_SIZE(hdmi_controls),
351 .dapm_widgets = hdmi_widgets,
352 .num_dapm_widgets = ARRAY_SIZE(hdmi_widgets),
353 .dapm_routes = hdmi_routes,
354 .num_dapm_routes = ARRAY_SIZE(hdmi_routes),
357 static int hdmi_codec_probe(struct platform_device *pdev)
359 struct hdmi_codec_pdata *hcd = pdev->dev.platform_data;
360 struct device *dev = &pdev->dev;
361 struct hdmi_codec_priv *hcp;
362 int dai_count, i = 0;
365 dev_dbg(dev, "%s()\n", __func__);
368 dev_err(dev, "%s: No plalform data\n", __func__);
372 dai_count = hcd->i2s + hcd->spdif;
373 if (dai_count < 1 || !hcd->ops || !hcd->ops->hw_params ||
374 !hcd->ops->audio_shutdown) {
375 dev_err(dev, "%s: Invalid parameters\n", __func__);
379 hcp = devm_kzalloc(dev, sizeof(*hcp), GFP_KERNEL);
384 mutex_init(&hcp->current_stream_lock);
386 hcp->daidrv = devm_kzalloc(dev, dai_count * sizeof(*hcp->daidrv),
392 hcp->daidrv[i] = hdmi_i2s_dai;
393 hcp->daidrv[i].playback.channels_max =
394 hcd->max_i2s_channels;
399 hcp->daidrv[i] = hdmi_spdif_dai;
401 ret = snd_soc_register_codec(dev, &hdmi_codec, hcp->daidrv,
404 dev_err(dev, "%s: snd_soc_register_codec() failed (%d)\n",
409 dev_set_drvdata(dev, hcp);
413 static int hdmi_codec_remove(struct platform_device *pdev)
415 snd_soc_unregister_codec(&pdev->dev);
419 static struct platform_driver hdmi_codec_driver = {
421 .name = HDMI_CODEC_DRV_NAME,
423 .probe = hdmi_codec_probe,
424 .remove = hdmi_codec_remove,
427 module_platform_driver(hdmi_codec_driver);
429 MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
430 MODULE_DESCRIPTION("HDMI Audio Codec Driver");
431 MODULE_LICENSE("GPL");
432 MODULE_ALIAS("platform:" HDMI_CODEC_DRV_NAME);