On 8/31/26 15:46, Robson Candido dos Santos Alves wrote:
>
> After updating from kernel v7.2.2 to v7.3-rc1, several DRM plane
> warnings regarding unset blend modes for pixel formats with alpha
> channels started appearing in dmesg during initialization.
>
> Good Version:
> - Kernel: 7.2.2-070202-generic
> - Display Core: v3.2.384
> - Result: Driver initializes cleanly without plane/blend mode warnings.
>
> Bad Version:
> - Kernel: 7.3.0-070300rc1-generic
> - Display Core: v3.2.392
> - Result: Driver emits the following warnings in dmesg:
>
> [drm] [PLANE:44:plane-0] pixel format with alpha exposed but blend
> mode not setup. Please fix.
Thx for the report. Not my area of expertise, but I guess that is caused
by 9813e158d13d ("drm/drm_blend: allow blend mode property without
PREMULTI") and will be fixed by the patch set "drm/atomic-state-helper:
fixes for blend-mode-prop warning":
https://lore.kernel.org/all/[email protected]/
That patches are afaics scheduled for inclusion in 7.4 -- but afaik the
the warning is safe to ignore.
Ciao, Thorsten
#regzbot introduced: 9813e158d13d
