[alsa-devel] [PATCH 6/8] ASoC: tegra: set i2s_offset to 0 for tdm

[Jon Hunter]

On 17/09/2019 19:12, Ben Dooks wrote:
> Set the offset to 0 for TDM mode, as per the current setup.
> 
> Signed-off-by: Ben Dooks <ben.dooks at codethink.co.uk>
> ---
>  sound/soc/tegra/tegra30_i2s.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
> index d75ce12fe177..3efef87ed8d8 100644
> --- a/sound/soc/tegra/tegra30_i2s.c
> +++ b/sound/soc/tegra/tegra30_i2s.c
> @@ -206,8 +206,11 @@ static int tegra30_i2s_hw_params(struct snd_pcm_substream *substream,
>  
>  	i2s->soc_data->set_audio_cif(i2s->regmap, reg, &cif_conf);
>  
> -	val = (1 << TEGRA30_I2S_OFFSET_RX_DATA_OFFSET_SHIFT) |
> -	      (1 << TEGRA30_I2S_OFFSET_TX_DATA_OFFSET_SHIFT);
> +	if (i2s->is_tdm)
> +		val = 0;
> +	else
> +		val = (1 << TEGRA30_I2S_OFFSET_RX_DATA_OFFSET_SHIFT) |
> +		      (1 << TEGRA30_I2S_OFFSET_TX_DATA_OFFSET_SHIFT);
>  	regmap_write(i2s->regmap, TEGRA30_I2S_OFFSET, val);
>  
>  	return 0;

Please move this code into tegra30_i2s_set_fmt() as it only needs to be
set once.

BTW, if you refer to the following I2S driver for Tegra210, you will see
how I think that we should handle this ...

https://nv-tegra.nvidia.com/gitweb/?p=linux-nvidia.git;a=blob;f=sound/soc/tegra-alt/tegra210_i2s_alt.c;h=ee482f27ed2e4710e5e7446918887f8f8ef31285;hb=a960d522a5486aee27605f890034869c4f49d94a#l310

Cheers
Jon	


-- 
nvpublic