[Intel-gfx] [PATCH 1/3] drm/i915: add SNB and IVB video sprite support v5

[Daniel Vetter]

On Wed, Dec 07, 2011 at 12:29:21PM -0800, Jesse Barnes wrote:
> The video sprites support various video surface formats natively and can
> handle scaling as well.  So add support for them using the new DRM core
> sprite support functions.
> 
> v2: use drm specific fourcc header and defines
> v3: address Daniel's comments:
>   - don't take struct mutex around register access (only needed for
>     regs in the GT power well)
>   - don't hold struct mutex across vblank waits
>   - fix up update_plane API (pass obj instead of GTT offset)
>   - add interlaced defines for sprite regs
>   - drop unnecessary 'reg' variables
>   - comment double buffered reg flushing
>   Also fix w/h confusion when writing the scaling reg.
> v4: more fixes, address more comments from Daniel, and include Hai's fix
>   - prevent divide by zero in scaling calculation (Hai Lan)
>   - update to Ville's new DRM_FORMAT_* types
>   - fix sprite watermark handling (calc based on CRTC size, separate
>     from normal display wm)
>   - remove private refcounts now that the fb cleanups handles things
> v5: add linear surface support
> 
> For this version, I tested DPMS since it came up in the last review;
> DPMS off/on works ok when a video player is working under X, but for
> power saving we'll probably want to do something smarter.  I'll leave
> that for a separate patch on top.  Likewise with the refcounting/fb
> layer handling, which are really separate cleanups.
> 
> Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>

I didn't bother to recheck the regs and and the wm stuff looks like the
usual magic ;-) Otherwise you've implemented way more of my review
comments than I could possibly still remember, so it must be good.

Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48