[PATCH v21 0/4] DRM overlay plane testing and enablement

[Daniel Stone]

Hi,
After a long discussion on IRC, patch 1 has been extensively rewritten.
Firstly, the handling of temporarily placing the old renderer
framebuffer has been localised to drm_output_propose_state, reducing the
damage. Secondly, the viciously ugly state_old handling in
prepare_scanout_view has been ripped out completely. We can only have a
renderer framebuffer to preserve if we are in mixed mode, and we can
only be in mixed mode if we've been unable to use a client framebuffer
for scanout. Hence, there is no need for the complicated handling.

Patch 2 is new, noticed after doing some of my own testing.

Patches 3 and 4 are still unchanged, and still pretty trivial.

Cheers,
Daniel