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SubjectRE: [PATCH] ASoC: AMD: Configure master codec on all playback/capture cases
Date
On 15 February 2019 07:06, Akshu Agrawal wrote:

> In the system design da7219 is the master codec and clocks are generated by it.
> Bclk is to be generated at the required rate for other codecs used when
> da7219 is acting only as clock master. For this call hw_params of da7219 during
> playback/capture on non da7219 codecs.
>
> Being able to set bclk at lower rate also fixes noise issue observed on some
> dmics.
>
> Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>

Reviewed-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>

> ---
> sound/soc/amd/acp-da7219-max98357a.c | 20 ++++++++++++++++++--
> 1 file changed, 18 insertions(+), 2 deletions(-)
>
> diff --git a/sound/soc/amd/acp-da7219-max98357a.c b/sound/soc/amd/acp-
> da7219-max98357a.c
> index a5daad973ce5..ad327415290a 100644
> --- a/sound/soc/amd/acp-da7219-max98357a.c
> +++ b/sound/soc/amd/acp-da7219-max98357a.c
> @@ -45,6 +45,7 @@
> #define CZ_PLAT_CLK 48000000
> #define DUAL_CHANNEL 2
>
> +static struct snd_soc_dai *codec_dai;
> static struct snd_soc_jack cz_jack;
> static struct clk *da7219_dai_clk;
> extern int bt_uart_enable;
> @@ -53,8 +54,10 @@ static int cz_da7219_init(struct snd_soc_pcm_runtime *rtd)
> {
> int ret;
> struct snd_soc_card *card = rtd->card;
> - struct snd_soc_dai *codec_dai = rtd->codec_dai;
> - struct snd_soc_component *component = codec_dai->component;
> + struct snd_soc_component *component;
> +
> + codec_dai = rtd->codec_dai;
> + component = codec_dai->component;
>
> dev_info(rtd->dev, "codec dai name = %s\n", codec_dai->name);
>
> @@ -255,6 +258,16 @@ static void cz_dmic_shutdown(struct
> snd_pcm_substream *substream)
> da7219_clk_disable();
> }
>
> +static static int cz_da7219_hw_params(struct snd_pcm_substream *substream,
> + struct snd_pcm_hw_params *params) {
> + /* da7219 Codec is clock master so setup as per the needs */
> + if (codec_dai->driver->ops->hw_params)
> + return codec_dai->driver->ops->hw_params(substream, params,
> + codec_dai);
> + return 0;
> +}
> +
> static const struct snd_soc_ops cz_da7219_play_ops = {
> .startup = cz_da7219_play_startup,
> .shutdown = cz_da7219_shutdown,
> @@ -268,16 +281,19 @@ static const struct snd_soc_ops cz_da7219_cap_ops = {
> static const struct snd_soc_ops cz_max_play_ops = {
> .startup = cz_max_startup,
> .shutdown = cz_max_shutdown,
> + .hw_params = cz_da7219_hw_params,
> };
>
> static const struct snd_soc_ops cz_dmic0_cap_ops = {
> .startup = cz_dmic0_startup,
> .shutdown = cz_dmic_shutdown,
> + .hw_params = cz_da7219_hw_params,
> };
>
> static const struct snd_soc_ops cz_dmic1_cap_ops = {
> .startup = cz_dmic1_startup,
> .shutdown = cz_dmic_shutdown,
> + .hw_params = cz_da7219_hw_params,
> };
>
> static struct snd_soc_dai_link cz_dai_7219_98357[] = {
> --
> 2.17.1

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