Re: [PATCH v4 6/6] drm/msm/dpu: limit the mode width to a pipe if the LM has no source split

[Dmitry Baryshkov]

On Thu, Oct 08, 2026 at 10:53:52PM +0530, Mahadevan P wrote:
> Layer mixers without DPU_MIXER_SOURCESPLIT stage one pipe per blend level,
> so a plane is fetched by a single pipe of at most max_linewidth pixels.
> 
> max_mixer_width used to reject wider modes. Now that the mode is checked
> against the PINGPONG width (4096/5120), keep max_linewidth as an extra
> bound when source split isn't available.

This sounds as a misplaced patch. If one of the previous patches
over-relaxed the check, then this patch should come beforehand.

> 
> Assisted-by: LLM
> Signed-off-by: Mahadevan P <mahadevan.p@xxxxxxxxxxxxxxxx>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 

-- 
With best wishes
Dmitry