[PATCH weston v2] compositor-drm: Fix disabling cursor plane

[Daniel Stone]

Hi Derek,

On 13 April 2017 at 21:11, Derek Foreman <derekf at osg.samsung.com> wrote:
> commit a7cba1d4cd4c9013c3ac6cb074fcb7842fb39283 changed the way
> the cursor plane is setup.  Previously it was pre-emptively set
> disabled for the next frame, and that would be changed at next
> frame time if the cursor plane was to be used.  It was changed
> to be disabled at plane assignment time.
>
> We disable the use of planes entirely by setting disable_planes to
> a non-zero value, which bypasses all calls to assign_planes - so
> if the plane was set-up in the previous frame it will retain its
> state post-disable.
>
> This leads to desktop zoom leaving the cursor plane in place when
> it sets disable_planes.
>
> This patch clears any stale cursor plane state from the redraw
> handler if disable_planes is set so drm_output_set_cursor()
> will do the right thing.

Good catch and equally good fix, thanks! Please feel free to land directly with:
Reviewed-by: Daniel Stone <daniels at collabora.com>
Reported-by: Emmanuel Gil Peyrot <emmanuel.peyrot at collabora.com>

Cheers,
Daniel