Re: [PATCH v2 1/2] drm/blend: Add per-plane pixel blend mode property

[Emil Velikov]

Hi Lowry,

Small drive-by suggestion. Haven't checked if others have pointed it
out previously :-\

On 30 May 2018 at 12:23, Lowry Li <lowry.li@xxxxxxx> wrote:

> +/**
> + * drm_plane_create_blend_mode_property - create a new blend mode property
> + * @plane: drm plane
> + * @supported_modes: bitmask of supported modes, must include
> + *                  BIT(DRM_MODE_BLEND_PREMULTI)
> + *
There are two possible blend modes (ignoring 'none'), yet premult must
be supported.
What if the hardware can do only "coverage"?

One-liner explaining why things are as-is would be a great move.

HTH
Emil