Hello Jyri, Tested with success on sti platform Acked-by: Arnaud Pouliquen <arnaud.pouliquen@xxxxxx> Regards Arnaud On 03/08/2016 09:14 PM, Jyri Sarha wrote: > The hdmi-codec is a platform device driver to be registered from > drivers of external HDMI encoders with I2S and/or spdif interface. The > driver in turn registers an ASoC codec for the HDMI encoder's audio > functionality. > > 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@xxxxxx> > --- > include/sound/hdmi-codec.h | 100 +++++++++++ > sound/soc/codecs/Kconfig | 6 + > sound/soc/codecs/Makefile | 2 + > sound/soc/codecs/hdmi-codec.c | 393 ++++++++++++++++++++++++++++++++++++++++++ > 4 files changed, 501 insertions(+) > create mode 100644 include/sound/hdmi-codec.h > create mode 100644 sound/soc/codecs/hdmi-codec.c > > diff --git a/include/sound/hdmi-codec.h b/include/sound/hdmi-codec.h > new file mode 100644 > index 0000000..fc3a481 > --- /dev/null > +++ b/include/sound/hdmi-codec.h > @@ -0,0 +1,100 @@ > +/* > + * hdmi-codec.h - HDMI Codec driver API > + * > + * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com > + * > + * Author: Jyri Sarha <jsarha@xxxxxx> > + * > + * 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_H__ > +#define __HDMI_CODEC_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 { > + /* > + * Called when ASoC starts an audio stream setup. > + * Optional > + */ > + int (*audio_startup)(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-Like-Data from connected HDMI device. > + * Optional > + */ > + int (*get_eld)(struct device *dev, uint8_t *buf, size_t len); > +}; > + > +/* HDMI codec initalization data */ > +struct hdmi_codec_pdata { > + const struct hdmi_codec_ops *ops; > + uint i2s:1; > + uint spdif:1; > + int max_i2s_channels; > +}; > + > +#define HDMI_CODEC_DRV_NAME "hdmi-audio-codec" > + > +#endif /* __HDMI_CODEC_H__ */ > diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig > index 50693c8..62b62fe 100644 > --- a/sound/soc/codecs/Kconfig > +++ b/sound/soc/codecs/Kconfig > @@ -86,6 +86,7 @@ config SND_SOC_ALL_CODECS > select SND_SOC_MC13783 if MFD_MC13XXX > select SND_SOC_ML26124 if I2C > select SND_SOC_NAU8825 if I2C > + select SND_SOC_HDMI_CODEC > select SND_SOC_PCM1681 if I2C > select SND_SOC_PCM179X if SPI_MASTER > select SND_SOC_PCM3008 > @@ -473,6 +474,11 @@ config SND_SOC_BT_SCO > config SND_SOC_DMIC > tristate > > +config SND_SOC_HDMI_CODEC > + tristate > + select SND_PCM_ELD > + select SND_PCM_IEC958 > + > config SND_SOC_ES8328 > tristate "Everest Semi ES8328 CODEC" > > diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile > index d44f7d3..5f7b002 100644 > --- a/sound/soc/codecs/Makefile > +++ b/sound/soc/codecs/Makefile > @@ -79,6 +79,7 @@ snd-soc-max9850-objs := max9850.o > snd-soc-mc13783-objs := mc13783.o > snd-soc-ml26124-objs := ml26124.o > snd-soc-nau8825-objs := nau8825.o > +snd-soc-hdmi-codec-objs := hdmi-codec.o > snd-soc-pcm1681-objs := pcm1681.o > snd-soc-pcm179x-codec-objs := pcm179x.o > snd-soc-pcm3008-objs := pcm3008.o > @@ -283,6 +284,7 @@ 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_NAU8825) += snd-soc-nau8825.o > +obj-$(CONFIG_SND_SOC_HDMI_CODEC) += snd-soc-hdmi-codec.o > obj-$(CONFIG_SND_SOC_PCM1681) += snd-soc-pcm1681.o > obj-$(CONFIG_SND_SOC_PCM179X) += snd-soc-pcm179x-codec.o > obj-$(CONFIG_SND_SOC_PCM3008) += snd-soc-pcm3008.o > diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c > new file mode 100644 > index 0000000..bc47b9a > --- /dev/null > +++ b/sound/soc/codecs/hdmi-codec.c > @@ -0,0 +1,393 @@ > +/* > + * ALSA SoC codec for HDMI encoder drivers > + * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/ > + * Author: Jyri Sarha <jsarha@xxxxxx> > + * > + * 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 <linux/string.h> > +#include <sound/core.h> > +#include <sound/pcm.h> > +#include <sound/pcm_params.h> > +#include <sound/soc.h> > +#include <sound/pcm_drm_eld.h> > +#include <sound/hdmi-codec.h> > +#include <sound/pcm_iec958.h> > + > +#include <drm/drm_crtc.h> /* This is only to get MAX_ELD_BYTES */ > + > +struct hdmi_codec_priv { > + struct hdmi_codec_pdata 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; > + uint8_t eld[MAX_ELD_BYTES]; > +}; > + > +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_I2S = 0, > + DAI_ID_SPDIF, > +}; > + > +static int hdmi_codec_new_stream(struct snd_pcm_substream *substream, > + struct snd_soc_dai *dai) > +{ > + struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(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 = snd_soc_dai_get_drvdata(dai); > + int ret = 0; > + > + dev_dbg(dai->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(dai->dev->parent); > + 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_eld) { > + ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->eld, > + sizeof(hcp->eld)); > + > + if (!ret) { > + ret = snd_pcm_hw_constraint_eld(substream->runtime, > + hcp->eld); > + 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 = snd_soc_dai_get_drvdata(dai); > + > + dev_dbg(dai->dev, "%s()\n", __func__); > + > + WARN_ON(hcp->current_stream != substream); > + > + hcp->hcd.ops->audio_shutdown(dai->dev->parent); > + > + mutex_lock(&hcp->current_stream_lock); > + hcp->current_stream = NULL; > + mutex_unlock(&hcp->current_stream_lock); > +} > + > +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 = snd_soc_dai_get_drvdata(dai); > + struct hdmi_codec_params hp = { > + .iec = { > + .status = { 0 }, > + .subcode = { 0 }, > + .pad = 0, > + .dig_subframe = { 0 }, > + } > + }; > + int ret; > + > + dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__, > + params_width(params), params_rate(params), > + params_channels(params)); > + > + ret = snd_pcm_create_iec958_consumer_hw_params(params, hp.iec.status, > + sizeof(hp.iec.status)); > + if (ret < 0) { > + dev_err(dai->dev, "Creating IEC958 channel status failed %d\n", > + ret); > + return ret; > + } > + > + ret = hdmi_codec_new_stream(substream, dai); > + if (ret) > + return ret; > + > + hdmi_audio_infoframe_init(&hp.cea); > + hp.cea.channels = params_channels(params); > + hp.cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM; > + hp.cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM; > + hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM; > + > + hp.sample_width = params_width(params); > + hp.sample_rate = params_rate(params); > + hp.channels = params_channels(params); > + > + return hcp->hcd.ops->hw_params(dai->dev->parent, &hcp->daifmt[dai->id], > + &hp); > +} > + > +static int hdmi_codec_set_fmt(struct snd_soc_dai *dai, > + unsigned int fmt) > +{ > + struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai); > + struct hdmi_codec_daifmt cf = { 0 }; > + int ret = 0; > + > + dev_dbg(dai->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(dai->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 = snd_soc_dai_get_drvdata(dai); > + > + dev_dbg(dai->dev, "%s()\n", __func__); > + > + if (hcp->hcd.ops->digital_mute) > + return hcp->hcd.ops->digital_mute(dai->dev->parent, 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_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) > + > +/* > + * This list is only for formats allowed on the I2S bus. So there is > + * some formats listed that are not supported by HDMI interface. For > + * instance allowing the 32-bit formats enables 24-precision with CPU > + * DAIs that do not support 24-bit formats. If the extra formats cause > + * problems, we should add the video side driver an option to disable > + * them. > + */ > +#define I2S_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 |\ > + 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_I2S, > + .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), > +}; > + > +static int hdmi_codec_probe(struct platform_device *pdev) > +{ > + struct hdmi_codec_pdata *hcd = pdev->dev.platform_data; > + struct device *dev = &pdev->dev; > + struct hdmi_codec_priv *hcp; > + int dai_count, i = 0; > + int ret; > + > + dev_dbg(dev, "%s()\n", __func__); > + > + if (!hcd) { > + dev_err(dev, "%s: No plalform data\n", __func__); > + return -EINVAL; > + } > + > + dai_count = hcd->i2s + hcd->spdif; > + if (dai_count < 1 || !hcd->ops || !hcd->ops->hw_params || > + !hcd->ops->audio_shutdown) { > + dev_err(dev, "%s: Invalid parameters\n", __func__); > + return -EINVAL; > + } > + > + hcp = devm_kzalloc(dev, sizeof(*hcp), GFP_KERNEL); > + if (!hcp) > + return -ENOMEM; > + > + hcp->hcd = *hcd; > + mutex_init(&hcp->current_stream_lock); > + > + hcp->daidrv = devm_kzalloc(dev, dai_count * sizeof(*hcp->daidrv), > + GFP_KERNEL); > + if (!hcp->daidrv) > + 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; > + > + ret = snd_soc_register_codec(dev, &hdmi_codec, hcp->daidrv, > + dai_count); > + if (ret) { > + dev_err(dev, "%s: snd_soc_register_codec() failed (%d)\n", > + __func__, ret); > + return ret; > + } > + > + dev_set_drvdata(dev, hcp); > + return 0; > +} > + > +static int hdmi_codec_remove(struct platform_device *pdev) > +{ > + snd_soc_unregister_codec(&pdev->dev); > + return 0; > +} > + > +static struct platform_driver hdmi_codec_driver = { > + .driver = { > + .name = HDMI_CODEC_DRV_NAME, > + }, > + .probe = hdmi_codec_probe, > + .remove = hdmi_codec_remove, > +}; > + > +module_platform_driver(hdmi_codec_driver); > + > +MODULE_AUTHOR("Jyri Sarha <jsarha@xxxxxx>"); > +MODULE_DESCRIPTION("HDMI Audio Codec Driver"); > +MODULE_LICENSE("GPL"); > +MODULE_ALIAS("platform:" HDMI_CODEC_DRV_NAME); > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
