On Fri, Feb 15, 2019 at 07:06:15AM +0000, Agrawal, Akshu 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 <[email protected]>
> Reviewed-by: Adam Thomson <[email protected]>
> ---
> 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,
s/static static/static/
gcc doesn't like the double static (at least neither gcc 6.5.0 nor 8.1.0
do), and it doesn't seem to be syntactically correct (even though,
oddly enough, clang accepts it w/o error message).
Guenter
> + 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[] = {
