[PATCH] drm/connector: Allow clearing HDMI infoframes

[AngeloGioacchino Del Regno]

Il 02/12/24 19:19, Derek Foreman ha scritto:
> Our infoframe setting code currently lacks the ability to clear
> infoframes. For some of the infoframes, we only need to replace them,
> so if an error occurred when generating a new infoframe we would leave
> a stale frame instead of clearing the frame.
> 
> However, the Dynamic Range and Mastering (DRM) infoframe should only
> be present when displaying HDR content (ie: the HDR_OUTPUT_METADATA blob
> is set). If we can't clear infoframes, the stale DRM infoframe will
> remain and we can never set the display back to SDR mode.
> 
> With this change, we clear infoframes when they can not, or should not,
> be generated. This fixes switching to an SDR mode from an HDR one.
> 
> Fixes: f378b77227bc4 ("drm/connector: hdmi: Add Infoframes generation")
> Signed-off-by: Derek Foreman <derek.foreman at collabora.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>