Re: [PATCH] drm/bridge: ite-it66121: Disable HDMI audio capture stream

[Dmitry Baryshkov]

On Thu, Mar 12, 2026 at 02:33:55PM -0500, Sen Wang wrote:
> The IT66121 is an HDMI transmitter and does not support audio capture.
> However, the driver registers hdmi-codec without setting no_i2s_capture,
> causing the codec to advertise a non-functional capture stream. Userspace
> audio servers such as PulseAudio then attempt to open this capture
> device, resulting in errors.
> 
> Set no_i2s_capture and no_spdif_capture in hdmi_codec_pdata so that the
> hdmi-codec driver only registers playback, matching the actual hardware
> capability.

As you hopefully have the hardware, can I suggest instead porting the
driver to HDMI helpers and HDMI audio helpers? The
drm_connector_hdmi_audio_init() already sets thesse flags for you.

> 
> Signed-off-by: Sen Wang <sen@xxxxxx>
> ---
>  drivers/gpu/drm/bridge/ite-it66121.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/bridge/ite-it66121.c b/drivers/gpu/drm/bridge/ite-it66121.c
> index 329fa47a5701..a1b2c3d4e5f6 100644
> --- a/drivers/gpu/drm/bridge/ite-it66121.c
> +++ b/drivers/gpu/drm/bridge/ite-it66121.c
> @@ -1476,6 +1476,8 @@ static int it66121_audio_codec_init(struct it66121_ctx *ctx, struct device *dev)
>  		.i2s = 1, /* Only i2s support for now */
>  		.spdif = 0,
>  		.max_i2s_channels = 8,
> +		.no_i2s_capture = 1,
> +		.no_spdif_capture = 1,
>  		.no_capture_mute = 1,
>  	};
> 
> --
> 2.34.1

-- 
With best wishes
Dmitry