[alsa-devel] [PATCH] ASoC: AMD: Set constraints for DMIC and MAX98357a codec

[Daniel Kurtz]

On Tue, Aug 21, 2018 at 12:55 AM Akshu Agrawal <akshu.agrawal at amd.com> wrote:
>
> We support dual channel, 48Khz. This constraint was set only for
> da7219. It is being extended to DMIC and MAX98357a.
>
> Signed-off-by: Akshu Agrawal <akshu.agrawal at amd.com>

Reviewed-by: Daniel Kurtz <djkurtz at chromium.org>

> ---
>  sound/soc/amd/acp-da7219-max98357a.c | 33 +++++++++++++++++++++++++++++++++
>  1 file changed, 33 insertions(+)
>
> diff --git a/sound/soc/amd/acp-da7219-max98357a.c b/sound/soc/amd/acp-da7219-max98357a.c
> index 066d5489..cf2f648 100644
> --- a/sound/soc/amd/acp-da7219-max98357a.c
> +++ b/sound/soc/amd/acp-da7219-max98357a.c
> @@ -162,10 +162,21 @@ static void cz_da7219_shutdown(struct snd_pcm_substream *substream)
>
>  static int cz_max_startup(struct snd_pcm_substream *substream)
>  {
> +       struct snd_pcm_runtime *runtime = substream->runtime;
>         struct snd_soc_pcm_runtime *rtd = substream->private_data;
>         struct snd_soc_card *card = rtd->card;
>         struct acp_platform_info *machine = snd_soc_card_get_drvdata(card);
>
> +       /*
> +        * On this platform for PCM device we support stereo
> +        */
> +
> +       runtime->hw.channels_max = DUAL_CHANNEL;
> +       snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
> +                                  &constraints_channels);
> +       snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
> +                                  &constraints_rates);
> +
>         machine->i2s_instance = I2S_BT_INSTANCE;
>         return da7219_clk_enable(substream);
>  }
> @@ -177,20 +188,42 @@ static void cz_max_shutdown(struct snd_pcm_substream *substream)
>
>  static int cz_dmic0_startup(struct snd_pcm_substream *substream)
>  {
> +       struct snd_pcm_runtime *runtime = substream->runtime;
>         struct snd_soc_pcm_runtime *rtd = substream->private_data;
>         struct snd_soc_card *card = rtd->card;
>         struct acp_platform_info *machine = snd_soc_card_get_drvdata(card);
>
> +       /*
> +        * On this platform for PCM device we support stereo
> +        */
> +
> +       runtime->hw.channels_max = DUAL_CHANNEL;
> +       snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
> +                                  &constraints_channels);
> +       snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
> +                                  &constraints_rates);
> +
>         machine->i2s_instance = I2S_BT_INSTANCE;
>         return da7219_clk_enable(substream);
>  }
>
>  static int cz_dmic1_startup(struct snd_pcm_substream *substream)
>  {
> +       struct snd_pcm_runtime *runtime = substream->runtime;
>         struct snd_soc_pcm_runtime *rtd = substream->private_data;
>         struct snd_soc_card *card = rtd->card;
>         struct acp_platform_info *machine = snd_soc_card_get_drvdata(card);
>
> +       /*
> +        * On this platform for PCM device we support stereo
> +        */
> +
> +       runtime->hw.channels_max = DUAL_CHANNEL;
> +       snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
> +                                  &constraints_channels);
> +       snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
> +                                  &constraints_rates);
> +
>         machine->i2s_instance = I2S_SP_INSTANCE;
>         machine->capture_channel = CAP_CHANNEL0;
>         return da7219_clk_enable(substream);
> --
> 1.9.1
>