new file mode 100644
@@ -0,0 +1,105 @@
+/*
+ * hdmi-codec-lib.h - HDMI codec library API
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Author: Jyri Sarha <jsarha@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+
+#ifndef __HDMI_CODEC_LIB_H__
+#define __HDMI_CODEC_LIB_H__
+
+#include <linux/hdmi.h>
+#include <drm/drm_edid.h>
+#include <sound/asoundef.h>
+#include <uapi/sound/asound.h>
+
+/*
+ * Protocol between ASoC cpu-dai and HDMI-encoder
+ */
+struct hdmi_codec_daifmt {
+ enum {
+ HDMI_I2S,
+ HDMI_RIGHT_J,
+ HDMI_LEFT_J,
+ HDMI_DSP_A,
+ HDMI_DSP_B,
+ HDMI_AC97,
+ HDMI_SPDIF,
+ } fmt;
+ int bit_clk_inv:1;
+ int frame_clk_inv:1;
+ int bit_clk_master:1;
+ int frame_clk_master:1;
+};
+
+/*
+ * HDMI audio parameters
+ */
+struct hdmi_codec_params {
+ struct hdmi_audio_infoframe cea;
+ struct snd_aes_iec958 iec;
+ int sample_rate;
+ int sample_width;
+ int channels;
+};
+
+struct hdmi_codec_ops {
+ /* For runtime clock configuration from ASoC machine driver.
+ * A direct forward from set_sysclk in struct snd_soc_dai_ops.
+ * Optional */
+ int (*set_clk)(struct device *dev, int clk_id, int freq);
+
+ /* Called when ASoC starts an audio stream setup. The call
+ * provides an audio abort callback for stoping an ongoing
+ * stream if the HDMI audio becomes unavailable.
+ * Optional */
+ int (*audio_startup)(struct device *dev,
+ void (*abort_cb)(struct device *dev));
+
+ /* Configures HDMI-encoder for audio stream.
+ * Mandatory */
+ int (*hw_params)(struct device *dev,
+ struct hdmi_codec_daifmt *fmt,
+ struct hdmi_codec_params *hparms);
+
+ /* Shuts down the audio stream.
+ * Mandatory */
+ void (*audio_shutdown)(struct device *dev);
+
+ /* Mute/unmute HDMI audio stream.
+ * Optional */
+ int (*digital_mute)(struct device *dev, bool enable);
+
+ /* Provides EDID short audio descriptors from connected HDMI device.
+ * Optional */
+ int (*get_sads)(struct device *dev, struct cea_sad **sads);
+};
+
+/* HDMI codec initalization data */
+struct hdmi_codec_data {
+ struct device *dev; /* The HDMI encoder registering the codec */
+ const struct hdmi_codec_ops *ops;
+ uint i2s:1;
+ uint spdif:1;
+ int max_i2s_channels;
+};
+
+/* Has to be the first member of the hdmi endcoder's drvdata */
+struct hdmi_codec_drvdata {
+ void *codec_data;
+};
+
+int asoc_hdmi_codec_register(struct hdmi_codec_data *data);
+void asoc_hdmi_codec_unregister(struct device *dev);
+
+#endif /* __HDMI_CODEC_LIB_H__ */
@@ -77,6 +77,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_MC13783 if MFD_MC13XXX
select SND_SOC_ML26124 if I2C
select SND_SOC_HDMI_CODEC
+ select SND_SOC_HDMI_CODEC_LIB
select SND_SOC_PCM1681 if I2C
select SND_SOC_PCM1792A if SPI_MASTER
select SND_SOC_PCM3008
@@ -433,6 +434,9 @@ config SND_SOC_DMIC
config SND_SOC_HDMI_CODEC
tristate "HDMI stub CODEC"
+config SND_SOC_HDMI_CODEC_LIB
+ tristate "lib for HDMI encoders with i2s or spdif interface"
+
config SND_SOC_ES8328
tristate "Everest Semi ES8328 CODEC"
@@ -70,6 +70,7 @@ snd-soc-max9850-objs := max9850.o
snd-soc-mc13783-objs := mc13783.o
snd-soc-ml26124-objs := ml26124.o
snd-soc-hdmi-codec-objs := hdmi.o
+snd-soc-hdmi-codec-lib-objs := hdmi-codec-lib.o
snd-soc-pcm1681-objs := pcm1681.o
snd-soc-pcm1792a-codec-objs := pcm1792a.o
snd-soc-pcm3008-objs := pcm3008.o
@@ -255,6 +256,7 @@ obj-$(CONFIG_SND_SOC_MAX9850) += snd-soc-max9850.o
obj-$(CONFIG_SND_SOC_MC13783) += snd-soc-mc13783.o
obj-$(CONFIG_SND_SOC_ML26124) += snd-soc-ml26124.o
obj-$(CONFIG_SND_SOC_HDMI_CODEC) += snd-soc-hdmi-codec.o
+obj-$(CONFIG_SND_SOC_HDMI_CODEC_LIB) += snd-soc-hdmi-codec-lib.o
obj-$(CONFIG_SND_SOC_PCM1681) += snd-soc-pcm1681.o
obj-$(CONFIG_SND_SOC_PCM1792A) += snd-soc-pcm1792a-codec.o
obj-$(CONFIG_SND_SOC_PCM3008) += snd-soc-pcm3008.o
new file mode 100644
@@ -0,0 +1,536 @@
+/*
+ * ALSA SoC codec library for HDMI encoder drivers.
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
+ * Author: Jyri Sarha <jsarha@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+#include <linux/module.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/hdmi-codec-lib.h>
+
+struct hdmi_codec_priv {
+ struct hdmi_codec_data hcd;
+ struct snd_soc_dai_driver *daidrv;
+ struct hdmi_codec_daifmt daifmt[2];
+ struct mutex current_stream_lock;
+ struct snd_pcm_substream *current_stream;
+ struct snd_pcm_hw_constraint_list ratec;
+};
+
+static const struct snd_soc_dapm_widget hdmi_widgets[] = {
+ SND_SOC_DAPM_OUTPUT("TX"),
+};
+
+static const struct snd_soc_dapm_route hdmi_routes[] = {
+ { "TX", NULL, "Playback" },
+};
+
+enum {
+ DAI_ID_I2C = 0,
+ DAI_ID_SPDIF,
+};
+
+static
+struct hdmi_codec_priv *get_priv(struct snd_soc_dai *dai)
+{
+ struct hdmi_codec_drvdata *drvdata =
+ snd_soc_codec_get_drvdata(dai->codec);
+
+ return drvdata->codec_data;
+}
+
+#define CAE_SAD_FORMAT_PCM 1
+#define CAE_SAD_PCM_BYTE2_16BIT (1<<0)
+#define CAE_SAD_PCM_BYTE2_20BIT (1<<1)
+#define CAE_SAD_PCM_BYTE2_24BIT (1<<2)
+
+static int hdmi_codec_sads_constraint(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai,
+ struct cea_sad *sads, int sad_count)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct hdmi_codec_priv *hcp = get_priv(dai);
+ static const unsigned int hdmi_rates[] = {
+ 32000, 44100, 48000, 88200, 96000, 176400, 192000
+ };
+ struct cea_sad *sad = NULL;
+ u_int64_t fmt_mask = 0;
+ int ret, i;
+
+ dev_dbg(hcp->hcd.dev, "%s()\n", __func__);
+
+ /* Just use the first SAD block with PCM support */
+ for (i = 0; i < sad_count; i++) {
+ dev_dbg(hcp->hcd.dev,
+ "%d: format 0x%02x freq 0x%02x byte2 0x%02x\n",
+ i, sads[i].format, sads[i].freq, sads[i].byte2);
+ if (sads[i].format == CAE_SAD_FORMAT_PCM) {
+ sad = &sads[i];
+ break;
+ }
+ }
+
+ if (!sad) {
+ dev_info(hcp->hcd.dev, "%s: No PCM support found\n", __func__);
+ return -EINVAL;
+ }
+
+ hcp->ratec.list = hdmi_rates;
+ hcp->ratec.count = ARRAY_SIZE(hdmi_rates);
+ hcp->ratec.mask = sad->freq;
+ ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+ &hcp->ratec);
+ if (ret)
+ return ret;
+
+ ret = snd_pcm_hw_constraint_minmax(runtime,
+ SNDRV_PCM_HW_PARAM_CHANNELS,
+ 1, sad->channels + 1);
+ if (ret)
+ return ret;
+
+ /* There is no direct link between I2S format and what is
+ * being sent to HDMI wire. */
+ if (hcp->daifmt[dai->id].fmt == HDMI_SPDIF) {
+ if (sad->byte2 & CAE_SAD_PCM_BYTE2_16BIT) {
+ fmt_mask |= SNDRV_PCM_FMTBIT_S16_LE;
+ fmt_mask |= SNDRV_PCM_FMTBIT_S16_BE;
+ }
+ if (sad->byte2 & CAE_SAD_PCM_BYTE2_20BIT) {
+ fmt_mask |= SNDRV_PCM_FMTBIT_S20_3LE;
+ fmt_mask |= SNDRV_PCM_FMTBIT_S20_3BE;
+ }
+ if (sad->byte2 & CAE_SAD_PCM_BYTE2_24BIT) {
+ fmt_mask |= SNDRV_PCM_FMTBIT_S24_3LE;
+ fmt_mask |= SNDRV_PCM_FMTBIT_S24_LE;
+ fmt_mask |= SNDRV_PCM_FMTBIT_S24_3BE;
+ fmt_mask |= SNDRV_PCM_FMTBIT_S24_BE;
+ }
+
+ ret = snd_pcm_hw_constraint_mask64(runtime,
+ SNDRV_PCM_HW_PARAM_FORMAT,
+ fmt_mask);
+ }
+ return ret;
+}
+
+static void hdmi_codec_abort(struct device *dev)
+{
+ struct hdmi_codec_drvdata *drvdata = dev_get_drvdata(dev);
+ struct hdmi_codec_priv *hcp = drvdata->codec_data;
+
+ dev_dbg(hcp->hcd.dev, "%s()\n", __func__);
+
+ mutex_lock(&hcp->current_stream_lock);
+ if (hcp->current_stream && hcp->current_stream->runtime &&
+ snd_pcm_running(hcp->current_stream)) {
+ dev_info(dev, "HDMI audio playback aborted\n");
+ snd_pcm_stream_lock_irq(hcp->current_stream);
+ snd_pcm_stop(hcp->current_stream, SNDRV_PCM_STATE_DISCONNECTED);
+ snd_pcm_stream_unlock_irq(hcp->current_stream);
+ }
+ mutex_unlock(&hcp->current_stream_lock);
+}
+
+static int hdmi_codec_new_stream(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct hdmi_codec_priv *hcp = get_priv(dai);
+ int ret = 0;
+
+ mutex_lock(&hcp->current_stream_lock);
+ if (!hcp->current_stream) {
+ hcp->current_stream = substream;
+ } else if (hcp->current_stream != substream) {
+ dev_err(dai->dev, "Only one simultaneous stream supported!\n");
+ ret = -EINVAL;
+ }
+ mutex_unlock(&hcp->current_stream_lock);
+
+ return ret;
+}
+
+static int hdmi_codec_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct hdmi_codec_priv *hcp = get_priv(dai);
+ struct cea_sad *sads = NULL;
+ int ret = 0;
+
+ dev_dbg(hcp->hcd.dev, "%s()\n", __func__);
+
+ ret = hdmi_codec_new_stream(substream, dai);
+ if (ret)
+ return ret;
+
+ if (hcp->hcd.ops->audio_startup) {
+ ret = hcp->hcd.ops->audio_startup(hcp->hcd.dev,
+ hdmi_codec_abort);
+ if (ret) {
+ mutex_lock(&hcp->current_stream_lock);
+ hcp->current_stream = NULL;
+ mutex_unlock(&hcp->current_stream_lock);
+ return ret;
+ }
+ }
+
+ if (hcp->hcd.ops->get_sads) {
+ ret = hcp->hcd.ops->get_sads(hcp->hcd.dev, &sads);
+ if (ret < 0)
+ return ret;
+
+ ret = hdmi_codec_sads_constraint(substream, dai, sads, ret);
+ kfree(sads);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct hdmi_codec_priv *hcp = get_priv(dai);
+
+ dev_dbg(hcp->hcd.dev, "%s()\n", __func__);
+
+ mutex_lock(&hcp->current_stream_lock);
+ BUG_ON(hcp->current_stream != substream);
+ hcp->current_stream = NULL;
+ mutex_unlock(&hcp->current_stream_lock);
+
+ hcp->hcd.ops->audio_shutdown(hcp->hcd.dev);
+}
+
+static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct hdmi_codec_priv *hcp = get_priv(dai);
+ struct hdmi_codec_params hp = {
+ .cea = { 0 },
+ .iec = {
+ .status = {
+ IEC958_AES0_CON_NOT_COPYRIGHT,
+ IEC958_AES1_CON_GENERAL,
+ IEC958_AES2_CON_SOURCE_UNSPEC,
+ IEC958_AES3_CON_CLOCK_VARIABLE,
+ },
+ .subcode = { 0 },
+ .pad = 0,
+ .dig_subframe = { 0 },
+ }
+ };
+ int ret;
+
+ dev_dbg(hcp->hcd.dev, "%s()\n", __func__);
+
+ ret = hdmi_codec_new_stream(substream, dai);
+ if (ret)
+ return ret;
+
+ hdmi_audio_infoframe_init(&hp.cea);
+ hp.cea.coding_type = HDMI_AUDIO_CODING_TYPE_PCM;
+ hp.cea.channels = params_channels(params);
+
+ switch (params_width(params)) {
+ case 16:
+ hp.iec.status[4] |= IEC958_AES4_CON_WORDLEN_20_16;
+ hp.cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_16;
+ break;
+ case 18:
+ hp.iec.status[4] |= IEC958_AES4_CON_WORDLEN_22_18;
+ hp.cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_20;
+ break;
+ case 20:
+ hp.iec.status[4] |= IEC958_AES4_CON_WORDLEN_24_20;
+ hp.cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_20;
+ break;
+ case 24:
+ case 32:
+ hp.iec.status[4] |= IEC958_AES4_CON_MAX_WORDLEN_24 |
+ IEC958_AES4_CON_WORDLEN_24_20;
+ hp.cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_24;
+ break;
+ default:
+ dev_err(dai->dev, "sample width not supported!\n");
+ return -EINVAL;
+ }
+
+ switch (params_rate(params)) {
+ case 32000:
+ hp.iec.status[3] |= IEC958_AES3_CON_FS_32000;
+ hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_32000;
+ break;
+ case 44100:
+ hp.iec.status[3] |= IEC958_AES3_CON_FS_44100;
+ hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_44100;
+ break;
+ case 48000:
+ hp.iec.status[3] |= IEC958_AES3_CON_FS_48000;
+ hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_48000;
+ break;
+ case 88200:
+ hp.iec.status[3] |= IEC958_AES3_CON_FS_88200;
+ hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_88200;
+ break;
+ case 96000:
+ hp.iec.status[3] |= IEC958_AES3_CON_FS_96000;
+ hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_96000;
+ break;
+ case 176400:
+ hp.iec.status[3] |= IEC958_AES3_CON_FS_176400;
+ hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_176400;
+ break;
+ case 192000:
+ hp.iec.status[3] |= IEC958_AES3_CON_FS_192000;
+ hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_192000;
+ break;
+ default:
+ dev_err(dai->dev, "rate not supported!\n");
+ return -EINVAL;
+ }
+ hp.sample_width = params_width(params);
+ hp.sample_rate = params_rate(params);
+ hp.channels = params_channels(params);
+
+ return hcp->hcd.ops->hw_params(hcp->hcd.dev, &hcp->daifmt[dai->id],
+ &hp);
+}
+
+static int hdmi_codec_set_sysclk(struct snd_soc_dai *dai,
+ int clk_id, unsigned int freq, int dir)
+{
+ struct hdmi_codec_priv *hcp = get_priv(dai);
+
+ dev_dbg(hcp->hcd.dev, "%s()\n", __func__);
+
+ if (hcp->hcd.ops->set_clk)
+ return hcp->hcd.ops->set_clk(hcp->hcd.dev, clk_id, freq);
+
+ return 0;
+}
+
+static int hdmi_codec_set_fmt(struct snd_soc_dai *dai,
+ unsigned int fmt)
+{
+ struct hdmi_codec_priv *hcp = get_priv(dai);
+ struct hdmi_codec_daifmt cf = { 0 };
+ int ret = 0;
+
+ dev_dbg(hcp->hcd.dev, "%s()\n", __func__);
+
+ if (dai->id == DAI_ID_SPDIF) {
+ cf.fmt = HDMI_SPDIF;
+ } else {
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ cf.bit_clk_master = 1;
+ cf.frame_clk_master = 1;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFM:
+ cf.frame_clk_master = 1;
+ break;
+ case SND_SOC_DAIFMT_CBM_CFS:
+ cf.bit_clk_master = 1;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFS:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ cf.frame_clk_inv = 1;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ cf.bit_clk_inv = 1;
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ cf.frame_clk_inv = 1;
+ cf.bit_clk_inv = 1;
+ break;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ cf.fmt = HDMI_I2S;
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ cf.fmt = HDMI_DSP_A;
+ break;
+ case SND_SOC_DAIFMT_DSP_B:
+ cf.fmt = HDMI_DSP_B;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ cf.fmt = HDMI_RIGHT_J;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ cf.fmt = HDMI_LEFT_J;
+ break;
+ case SND_SOC_DAIFMT_AC97:
+ cf.fmt = HDMI_AC97;
+ break;
+ default:
+ dev_err(hcp->hcd.dev, "Invalid DAI interface format\n");
+ return -EINVAL;
+ }
+ }
+
+ hcp->daifmt[dai->id] = cf;
+
+ return ret;
+}
+
+static int hdmi_codec_digital_mute(struct snd_soc_dai *dai, int mute)
+{
+ struct hdmi_codec_priv *hcp = get_priv(dai);
+
+ dev_dbg(hcp->hcd.dev, "%s()\n", __func__);
+
+ if (hcp->hcd.ops->digital_mute)
+ return hcp->hcd.ops->digital_mute(hcp->hcd.dev, mute);
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops hdmi_dai_ops = {
+ .startup = hdmi_codec_startup,
+ .shutdown = hdmi_codec_shutdown,
+ .hw_params = hdmi_codec_hw_params,
+ .set_sysclk = hdmi_codec_set_sysclk,
+ .set_fmt = hdmi_codec_set_fmt,
+ .digital_mute = hdmi_codec_digital_mute,
+};
+
+
+#define HDMI_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
+ SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
+ SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |\
+ SNDRV_PCM_RATE_192000)
+
+#define SPDIF_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
+ SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
+ SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE)
+
+#define I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
+ SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE |\
+ SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
+ SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE |\
+ SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE)
+
+static struct snd_soc_dai_driver hdmi_i2s_dai = {
+ .name = "i2s-hifi",
+ .id = DAI_ID_I2C,
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 8,
+ .rates = HDMI_RATES,
+ .formats = I2S_FORMATS,
+ .sig_bits = 24,
+ },
+ .ops = &hdmi_dai_ops,
+};
+
+static const struct snd_soc_dai_driver hdmi_spdif_dai = {
+ .name = "spdif-hifi",
+ .id = DAI_ID_SPDIF,
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = HDMI_RATES,
+ .formats = SPDIF_FORMATS,
+ },
+ .ops = &hdmi_dai_ops,
+};
+
+static struct snd_soc_codec_driver hdmi_codec = {
+ .dapm_widgets = hdmi_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(hdmi_widgets),
+ .dapm_routes = hdmi_routes,
+ .num_dapm_routes = ARRAY_SIZE(hdmi_routes),
+};
+
+int asoc_hdmi_codec_register(struct hdmi_codec_data *hcd)
+{
+ struct hdmi_codec_drvdata *drvdata = dev_get_drvdata(hcd->dev);
+ struct hdmi_codec_priv *hcp;
+ int dai_count, i = 0;
+
+ dev_dbg(hcd->dev, "%s()\n", __func__);
+
+ if (!hcd || !hcd->dev || !hcd->ops)
+ return -EINVAL;
+
+ if (!try_module_get(THIS_MODULE))
+ return -ENODEV;
+
+ dai_count = hcd->i2s + hcd->spdif;
+ if (dai_count < 1 || !hcd->ops->hw_params ||
+ !hcd->ops->audio_shutdown) {
+ dev_err(hcd->dev, "%s: Invalid parameters\n", __func__);
+ module_put(THIS_MODULE);
+ return -EINVAL;
+ }
+
+ hcp = devm_kzalloc(hcd->dev, sizeof(*hcp), GFP_KERNEL);
+ if (!hcp) {
+ module_put(THIS_MODULE);
+ return -ENOMEM;
+ }
+
+ hcp->hcd = *hcd;
+ mutex_init(&hcp->current_stream_lock);
+
+ hcp->daidrv = devm_kzalloc(hcd->dev, dai_count * sizeof(*hcp->daidrv),
+ GFP_KERNEL);
+ if (!hcp->daidrv) {
+ module_put(THIS_MODULE);
+ return -ENOMEM;
+ }
+
+ if (hcd->i2s) {
+ hcp->daidrv[i] = hdmi_i2s_dai;
+ hcp->daidrv[i].playback.channels_max =
+ hcd->max_i2s_channels;
+ i++;
+ }
+
+ if (hcd->spdif)
+ hcp->daidrv[i] = hdmi_spdif_dai;
+
+ drvdata->codec_data = hcp;
+
+ return snd_soc_register_codec(hcp->hcd.dev, &hdmi_codec, hcp->daidrv,
+ dai_count);
+}
+EXPORT_SYMBOL_GPL(asoc_hdmi_codec_register);
+
+void asoc_hdmi_codec_unregister(struct device *dev)
+{
+ snd_soc_unregister_codec(dev);
+ module_put(THIS_MODULE);
+}
+EXPORT_SYMBOL_GPL(asoc_hdmi_codec_unregister);
+
+MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
+MODULE_DESCRIPTION("HDMI Codec Library");
+MODULE_LICENSE("GPL");
The hdmi-codec-lib is a library for registering an ASoC codec under an external HDMI encoder driver with I2S and/or spdif interface. The structures and definitions in the API header are mostly redundant copies of similar structures in ASoC headers. This is on purpose to avoid direct dependencies to ASoC structures in video side driver. Signed-off-by: Jyri Sarha <jsarha@ti.com> --- include/sound/hdmi-codec-lib.h | 105 ++++++++ sound/soc/codecs/Kconfig | 4 + sound/soc/codecs/Makefile | 2 + sound/soc/codecs/hdmi-codec-lib.c | 536 ++++++++++++++++++++++++++++++++++++++ 4 files changed, 647 insertions(+) create mode 100644 include/sound/hdmi-codec-lib.h create mode 100644 sound/soc/codecs/hdmi-codec-lib.c