On 03/31/2016 03:36 PM, Jyri Sarha wrote:
> Add audio abort() callback, that is provided at audio stream start,
> for video side. This is for video side to use in case there is a
> pressing need to tear down the audio playback for some reason.
>
> Signed-off-by: Jyri Sarha <jsarha@xxxxxx>
> ---
> include/sound/hdmi-codec.h | 8 ++++++--
> sound/soc/codecs/hdmi-codec.c | 20 +++++++++++++++++++-
> 2 files changed, 25 insertions(+), 3 deletions(-)
>
> diff --git a/include/sound/hdmi-codec.h b/include/sound/hdmi-codec.h
> index fc3a481..15fe70f 100644
> --- a/include/sound/hdmi-codec.h
> +++ b/include/sound/hdmi-codec.h
> @@ -55,10 +55,14 @@ struct hdmi_codec_params {
>
> struct hdmi_codec_ops {
> /*
> - * Called when ASoC starts an audio stream setup.
> + * Called when ASoC starts an audio stream setup. The call
> + * provides an audio abort callback for stoping an ongoing
stopping
> + * stream from video side driver if the HDMI audio becomes
> + * unavailable.
> * Optional
> */
> - int (*audio_startup)(struct device *dev);
> + int (*audio_startup)(struct device *dev,
> + void (*abort_cb)(struct device *dev));
>
> /*
> * Configures HDMI-encoder for audio stream.
> diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
> index b46b8ed..35151a4 100644
> --- a/sound/soc/codecs/hdmi-codec.c
> +++ b/sound/soc/codecs/hdmi-codec.c
> @@ -47,6 +47,23 @@ enum {
> DAI_ID_SPDIF,
> };
>
> +static void hdmi_codec_abort(struct device *dev)
> +{
> + struct hdmi_codec_priv *hcp = dev_get_drvdata(dev);
> +
> + dev_dbg(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);
> +}
> +
still not understand the need... i can not find a use case that
justifies it.
As example, in case of HDMI plug/unplug i would not want that audio
stream is stopped (live playback). From my point of view this should be
a decision from user.
But as it is optional, I'm ok if need is justified.
> static int hdmi_codec_new_stream(struct snd_pcm_substream *substream,
> struct snd_soc_dai *dai)
> {
> @@ -78,7 +95,8 @@ static int hdmi_codec_startup(struct snd_pcm_substream *substream,
> return ret;
>
> if (hcp->hcd.ops->audio_startup) {
> - ret = hcp->hcd.ops->audio_startup(dai->dev->parent);
> + ret = hcp->hcd.ops->audio_startup(dai->dev->parent,
> + hdmi_codec_abort);
> if (ret) {
> mutex_lock(&hcp->current_stream_lock);
> hcp->current_stream = NULL;
>
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