Re: [PATCH v2 16/20] drm/msm/dp: Disable PSR for YUV420 streams

[Dmitry Baryshkov]

On Fri, Oct 09, 2026 at 11:16:08AM +0800, Xilin Wu wrote:
> YUV420 uses colorimetry VSC packets, which cannot share the automatic
> PSR packet generator. Do not advertise self-refresh eligibility for
> these streams while disabling PSR in the controller and sink.

I'd need to check if it's possible to handle both. Otherwise it looks
good.

> 
> Compute eligibility after the common atomic check and reject an
> incompatible self-refresh entry. Clear the automatic VSC generation bit
> for YUV420 and restore PSR configuration when returning to RGB.
> 
> Assisted-by: LLM
> Signed-off-by: Xilin Wu <sophon@xxxxxxxxx>
> ---
>  drivers/gpu/drm/msm/dp/dp_ctrl.c    | 19 ++++++++++++-------
>  drivers/gpu/drm/msm/dp/dp_ctrl.h    |  2 +-
>  drivers/gpu/drm/msm/dp/dp_display.c |  3 ++-
>  drivers/gpu/drm/msm/dp/dp_drm.c     | 16 ++++++++++++----
>  4 files changed, 27 insertions(+), 13 deletions(-)
> 

-- 
With best wishes
Dmitry