[Intel-gfx] [PATCH 2/2] drm/i915: Bump pin_count to UINT_MAX.

[Chris Wilson]

On Mon, May 23, 2016 at 03:37:41PM +0200, Maarten Lankhorst wrote:
> With nonblocking unpin there can be many cursor pins before they're
> cleared by the next page flip.
> 
> Fix this by extending pin_count to the full 32-bit to prevent a
> WARN_ON(vma->pin_count == DRM_I915_GEM_OBJECT_MAX_PIN_COUNT)

This is a hack that affects non-KMS paths. Being able to process binding
in a single operation on all architectures is something we want to
preserve.

Why is every cursor movement generating an unpin work? Should I just
start poking registers from userspace to avoid a silly kerenl?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre