[PATCH] drm: bridge: adv7511: Support I2S IEC958 encoded PCM format

[Robert Foss]

Hey Sia,

Thanks for the patch, it looks good to me.

Reviewed-by: Robert Foss <robert.foss at linaro.org>

On Fri, 12 Mar 2021 at 10:09, Sia Jee Heng <jee.heng.sia at intel.com> wrote:
>
> Support IEC958 encoded PCM format for ADV7511 so that ADV7511 HDMI
> audio driver can accept the IEC958 data from the I2S input.
>
> Signed-off-by: Sia Jee Heng <jee.heng.sia at intel.com>
> ---
>  drivers/gpu/drm/bridge/adv7511/adv7511.h       | 1 +
>  drivers/gpu/drm/bridge/adv7511/adv7511_audio.c | 6 ++++++
>  2 files changed, 7 insertions(+)
>
> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h b/drivers/gpu/drm/bridge/adv7511/adv7511.h
> index a9bb734366ae..05e3abb5a0c9 100644
> --- a/drivers/gpu/drm/bridge/adv7511/adv7511.h
> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h
> @@ -191,6 +191,7 @@
>  #define ADV7511_I2S_FORMAT_I2S                 0
>  #define ADV7511_I2S_FORMAT_RIGHT_J             1
>  #define ADV7511_I2S_FORMAT_LEFT_J              2
> +#define ADV7511_I2S_IEC958_DIRECT              3
>
>  #define ADV7511_PACKET(p, x)       ((p) * 0x20 + (x))
>  #define ADV7511_PACKET_SDP(x)      ADV7511_PACKET(0, x)
> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c b/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c
> index 45838bd08d37..61f4a38e7d2b 100644
> --- a/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c
> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c
> @@ -101,6 +101,10 @@ static int adv7511_hdmi_hw_params(struct device *dev, void *data,
>         case 20:
>                 len = ADV7511_I2S_SAMPLE_LEN_20;
>                 break;
> +       case 32:
> +               if (fmt->bit_fmt != SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
> +                       return -EINVAL;
> +               fallthrough;
>         case 24:
>                 len = ADV7511_I2S_SAMPLE_LEN_24;
>                 break;
> @@ -112,6 +116,8 @@ static int adv7511_hdmi_hw_params(struct device *dev, void *data,
>         case HDMI_I2S:
>                 audio_source = ADV7511_AUDIO_SOURCE_I2S;
>                 i2s_format = ADV7511_I2S_FORMAT_I2S;
> +               if (fmt->bit_fmt == SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
> +                       i2s_format = ADV7511_I2S_IEC958_DIRECT;
>                 break;
>         case HDMI_RIGHT_J:
>                 audio_source = ADV7511_AUDIO_SOURCE_I2S;
>
> base-commit: de066e116306baf3a6a62691ac63cfc0b1dabddb
> --
> 2.18.0
>