[PATCH v2 00/10] drm/ast: Clean-up cursor-plane updates

[Gerd Hoffmann]

On Tue, Feb 09, 2021 at 02:46:22PM +0100, Thomas Zimmermann wrote:
> (was: drm/ast: Move cursor vmap calls out of commit tail)
> 
> Ast has vmap calls in its cursor's atomic_update function. This is not
> supported as vmap might aquire the dma reservation lock. While at it,
> cleanup the whole cursor code: the patchset removes all possible runtime
> errors from the atomic_update function and reduces the overhead from
> vmap calls on the HW cursor BOs to a minimum.
> 
> Patches 1 to 3 update the cursor code and prepare before the refactoring.
> 
> Patch 4 and 5 inline the cursor update logic into the rsp cursor-plane
> functions. This is mostly about moving code around.
> 
> Patches 6 to 9 add a dedicated cursor plane that maintains the two BOs
> for HW cursors. The HW cursor BOs are permanently pinned and vmapped
> while the cursor plane is initialized. Thus removing the related vmap
> operations from atomic_update.
> 
> Finally patch 10 converts ast cursors to struct drm_shadow_plane_state.
> BOs with cursor image data from userspace are vmapped in prepare_fb and
> vunampped in cleanup_fb. The actual update of the cursor image is being
> moved from prepare_fb to atomic_update.
> 
> With the patchset applied, all cursor preparation is performed before
> the commit-tail functions; while the actual update is performed within.
> 
> Tested by running X11 and Weston on ast hardware.
> 
> v2:
> 	* convert to drm_shadow_plane_state helpers

Looks all sane to me.
Acked-by: Gerd Hoffmann <kraxel at redhat.com>