From 067cda9dd7d018b033877df4996383b3529fdbad Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Fri, 30 Apr 2021 14:22:06 +0200 Subject: [PATCH] ASoC: hdmi-codec: Add a prepare hook The IEC958 status bit is usually set by the userspace after hw_params has been called, so in order to use whatever is set by the userspace, we need to implement the prepare hook. Let's add it to the hdmi_codec_ops, and mandate that either prepare or hw_params is implemented. Signed-off-by: Maxime Ripard --- include/sound/hdmi-codec.h | 12 +++- sound/soc/codecs/hdmi-codec.c | 112 ++++++++++++++++++++++++++-------- 2 files changed, 99 insertions(+), 25 deletions(-) --- a/include/sound/hdmi-codec.h +++ b/include/sound/hdmi-codec.h @@ -65,13 +65,23 @@ struct hdmi_codec_ops { /* * Configures HDMI-encoder for audio stream. - * Mandatory + * Having either prepare or hw_params is mandatory. */ int (*hw_params)(struct device *dev, void *data, struct hdmi_codec_daifmt *fmt, struct hdmi_codec_params *hparms); /* + * Configures HDMI-encoder for audio stream. Can be called + * multiple times for each setup. + * + * Having either prepare or hw_params is mandatory. + */ + int (*prepare)(struct device *dev, void *data, + struct hdmi_codec_daifmt *fmt, + struct hdmi_codec_params *hparms); + + /* * Shuts down the audio stream. * Mandatory */ --- a/sound/soc/codecs/hdmi-codec.c +++ b/sound/soc/codecs/hdmi-codec.c @@ -480,6 +480,42 @@ static void hdmi_codec_shutdown(struct s mutex_unlock(&hcp->lock); } +static int hdmi_codec_fill_codec_params(struct snd_soc_dai *dai, + unsigned int sample_width, + unsigned int sample_rate, + unsigned int channels, + struct hdmi_codec_params *hp) +{ + struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai); + int idx; + + /* Select a channel allocation that matches with ELD and pcm channels */ + idx = hdmi_codec_get_ch_alloc_table_idx(hcp, channels); + if (idx < 0) { + dev_err(dai->dev, "Not able to map channels to speakers (%d)\n", + idx); + hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN; + return idx; + } + + memset(hp, 0, sizeof(*hp)); + + hdmi_audio_infoframe_init(&hp->cea); + hp->cea.channels = channels; + 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->cea.channel_allocation = hdmi_codec_channel_alloc[idx].ca_id; + + hp->sample_width = sample_width; + hp->sample_rate = sample_rate; + hp->channels = channels; + + hcp->chmap_idx = hdmi_codec_channel_alloc[idx].ca_id; + + return 0; +} + static int hdmi_codec_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) @@ -494,13 +530,24 @@ static int hdmi_codec_hw_params(struct s .dig_subframe = { 0 }, } }; - int ret, idx; + int ret; + + if (!hcp->hcd.ops->hw_params) + return 0; dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__, params_width(params), params_rate(params), params_channels(params)); - memcpy(hp.iec.status, hcp->iec_status, sizeof(hp->iec_status)); + ret = hdmi_codec_fill_codec_params(dai, + params_width(params), + params_rate(params), + params_channels(params), + &hp); + if (ret < 0) + return ret; + + memcpy(hp.iec.status, hcp->iec_status, sizeof(hp.iec.status)); ret = snd_pcm_fill_iec958_consumer_hw_params(params, hp.iec.status, sizeof(hp.iec.status)); if (ret < 0) { @@ -509,32 +556,47 @@ static int hdmi_codec_hw_params(struct s 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; - - /* Select a channel allocation that matches with ELD and pcm channels */ - idx = hdmi_codec_get_ch_alloc_table_idx(hcp, hp.cea.channels); - if (idx < 0) { - dev_err(dai->dev, "Not able to map channels to speakers (%d)\n", - idx); - hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN; - return idx; - } - hp.cea.channel_allocation = hdmi_codec_channel_alloc[idx].ca_id; - hcp->chmap_idx = hdmi_codec_channel_alloc[idx].ca_id; - - hp.sample_width = params_width(params); - hp.sample_rate = params_rate(params); - hp.channels = params_channels(params); - cf->bit_fmt = params_format(params); return hcp->hcd.ops->hw_params(dai->dev->parent, hcp->hcd.data, cf, &hp); } +static int hdmi_codec_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai); + struct hdmi_codec_daifmt *cf = dai->playback_dma_data; + struct snd_pcm_runtime *runtime = substream->runtime; + unsigned int channels = runtime->channels; + unsigned int width = snd_pcm_format_width(runtime->format); + unsigned int rate = runtime->rate; + struct hdmi_codec_params hp; + int ret; + + if (!hcp->hcd.ops->prepare) + return 0; + + dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__, + width, rate, channels); + + ret = hdmi_codec_fill_codec_params(dai, width, rate, channels, &hp); + if (ret < 0) + return ret; + + memcpy(hp.iec.status, hcp->iec_status, sizeof(hp.iec.status)); + ret = snd_pcm_fill_iec958_consumer(runtime, hp.iec.status, + sizeof(hp.iec.status)); + if (ret < 0) { + dev_err(dai->dev, "Creating IEC958 channel status failed %d\n", + ret); + return ret; + } + + cf->bit_fmt = runtime->format; + return hcp->hcd.ops->prepare(dai->dev->parent, hcp->hcd.data, + cf, &hp); +} + static int hdmi_codec_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) { @@ -626,6 +688,7 @@ static const struct snd_soc_dai_ops hdmi .startup = hdmi_codec_startup, .shutdown = hdmi_codec_shutdown, .hw_params = hdmi_codec_hw_params, + .prepare = hdmi_codec_prepare, .set_fmt = hdmi_codec_i2s_set_fmt, .mute_stream = hdmi_codec_mute, }; @@ -889,7 +952,8 @@ static int hdmi_codec_probe(struct platf } dai_count = hcd->i2s + hcd->spdif; - if (dai_count < 1 || !hcd->ops || !hcd->ops->hw_params || + if (dai_count < 1 || !hcd->ops || + (!hcd->ops->hw_params && !hcd->ops->prepare) || !hcd->ops->audio_shutdown) { dev_err(dev, "%s: Invalid parameters\n", __func__); return -EINVAL;