On 01/07/15 10:51, Jean-Francois Moine wrote:
> This patch adds a CODEC to the NXP TDA998x HDMI transmitter.
>
> The CODEC handles both I2S and S/PDIF inputs.
> It maintains the audio format and rate constraints according
> to the HDMI device parameters (EDID) and sets dynamically the input
> ports in the TDA998x I2C driver on start/stop audio streaming.
>
> Signed-off-by: Jean-Francois Moine <moinejf@xxxxxxx>
> ---
[snip]
> +static int tda998x_codec_startup(struct snd_pcm_substream *substream,
> + struct snd_soc_dai *dai)
> +{
> + struct snd_pcm_runtime *runtime = substream->runtime;
> + struct snd_pcm_hw_constraint_list *rate_constraints;
> + u8 *sad; /* Short Audio Descriptor (3 bytes) */
[...]
> + snd_pcm_hw_constraint_minmax(runtime,
> + SNDRV_PCM_HW_PARAM_CHANNELS,
> + 1, sad[SAD_MX_CHAN_I]);
In the light of our discussions elsewhere [1], shouldn't this
be constrained by the number of hardware channels that the TDA998x
supports too? That is, the maximum number of channels should
be the lesser of sd[SAD_MX_CHAN_I] and number_of_I2S channels
(or S/PDIF channels if so configured).
Andrew
[1] http://mailman.alsa-project.org/pipermail/alsa-devel/2015-January/086090.html
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