Re: [PATCH v2] drm/amd/display: Add error check for avi and vendor infoframe setup function

[Alex Hung <alex.hung@amd.com>]

On 4/7/25 20:20, Wentao Liang wrote:
> The function fill_stream_properties_from_drm_display_mode() calls the
> function drm_hdmi_avi_infoframe_from_display_mode() and the
> function drm_hdmi_vendor_infoframe_from_display_mode(), but does
> not check its return value. Log the error messages to prevent silent
> failure if either function fails.
> 
> Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
> ---
> v2: Fix code diff error
> 
>   drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 13 +++++++++++--
>   1 file changed, 11 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index 5f216d626cbb..8fc6ba12c82d 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -6104,6 +6104,7 @@ static void fill_stream_properties_from_drm_display_mode(
>   	struct amdgpu_dm_connector *aconnector = NULL;
>   	struct hdmi_vendor_infoframe hv_frame;
>   	struct hdmi_avi_infoframe avi_frame;
> +	ssize_t err;
>   
>   	if (connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK)
>   		aconnector = to_amdgpu_dm_connector(connector);
> @@ -6150,9 +6151,17 @@ static void fill_stream_properties_from_drm_display_mode(
>   	}
>   
>   	if (stream->signal == SIGNAL_TYPE_HDMI_TYPE_A) {
> -		drm_hdmi_avi_infoframe_from_display_mode(&avi_frame, (struct drm_connector *)connector, mode_in);
> +		err = drm_hdmi_avi_infoframe_from_display_mode(&avi_frame,
> +							       (struct drm_connector *)connector,
> +							       mode_in);
> +		if (err < 0)
> +			dev_err(connector->dev, "Failed to setup avi infoframe: %zd\n", err);

Please use drm_err

>   		timing_out->vic = avi_frame.video_code;
> -		drm_hdmi_vendor_infoframe_from_display_mode(&hv_frame, (struct drm_connector *)connector, mode_in);
> +		err = drm_hdmi_vendor_infoframe_from_display_mode(&hv_frame,
> +								  (struct drm_connector *)connector,
> +								  mode_in);
> +		if (err < 0)
> +			dev_err(connector->dev, "Failed to setup vendor infoframe: %zd\n", err);
Please use drm_err

>   		timing_out->hdmi_vic = hv_frame.vic;
>   	}
>