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SubjectRe: [PATCH v2] drm/vc4: Return -EBUSY if there's already a pending flip event.
Date
robert.foss@collabora.com writes:

> From: Robert Foss <robert.foss@collabora.com>
>
> As per the documentation in drm_crtc.h, atomic_commit should return
> -EBUSY if an asycnhronous update is requested and there is an earlier
> update pending.
>
> Note: docs cited here are drm_crtc.h, and the whole quote is:
>
> * - -EBUSY, if an asynchronous updated is requested and there is
> * an earlier updated pending. Drivers are allowed to support a queue
> * of outstanding updates, but currently no driver supports that.
> * Note that drivers must wait for preceding updates to complete if a
> * synchronous update is requested, they are not allowed to fail the
> * commit in that case.
>
> Signed-off-by: Robert Foss <robert.foss@collabora.com>

This looks good to me. Let's give it a few days on the list for any
other KMS folks to catch anything.
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