[alsa-devel] [PATCH 8/8] ASoC: tegra: take packing settings from the audio cif_config

[Jon Hunter]

On 17/09/2019 19:12, Ben Dooks wrote:
> If the CIF is not configured as 16 or 8 bit, then the
> packing for 8/16 bits should not be enabled as the
> hardware only supports 8 or 16 bit packing.
> 
> Signed-off-by: Ben Dooks <ben.dooks at codethink.co.uk>
> ---
>  sound/soc/tegra/tegra30_ahub.c | 29 +++++++++++++++++++++--------
>  1 file changed, 21 insertions(+), 8 deletions(-)
> 
> diff --git a/sound/soc/tegra/tegra30_ahub.c b/sound/soc/tegra/tegra30_ahub.c
> index 58e05ceb86da..c2f2e29dd32e 100644
> --- a/sound/soc/tegra/tegra30_ahub.c
> +++ b/sound/soc/tegra/tegra30_ahub.c
> @@ -96,10 +96,17 @@ int tegra30_ahub_setup_rx_fifo(enum tegra30_ahub_rxcif rxcif,
>  	      (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
>  	val = tegra30_apbif_read(reg);
>  	val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_MASK |
> -		 TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_MASK);
> -	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_SHIFT) |
> -	       TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN |
> -	       TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_16;
> +		 TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_MASK |
> +		 TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN);
> +	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_SHIFT);
> +	if (cif_conf->audio_bits == TEGRA30_AUDIOCIF_BITS_16 ||
> +	    cif_conf->audio_bits == TEGRA30_AUDIOCIF_BITS_8)
> +		val |= TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN;
> +	if (cif_conf->audio_bits == TEGRA30_AUDIOCIF_BITS_16)
> +		val |= TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_16;
> +	if (cif_conf->audio_bits == TEGRA30_AUDIOCIF_BITS_8)
> +		val |= TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_8_4;
> +
Ah maybe this is what I am missing from the previous patch. So the last
patch was a preparatory patch for this one.

Sameer, how is this handled in the case of Tegra210?

Cheers
Jon

-- 
nvpublic