On Tue, Oct 01, 2013 at 06:02:12PM +0300, [email protected] wrote:
> From: Ville Syrjälä <[email protected]>
> 
> We used to call the entire intel specific update_plane hook while
> holding struct_mutex. Actually we only need to hold struct_mutex while
> pinning/unpinning the obj. The plane state itself is protected by the
> kms locks, and as the object is pinned we can dig out the offset and
> tiling information from it without fearing that it would change
> underneath us.
> 
> So now we don't need to drop and reacquire the lock around the
> wait_for_vblank. Also we will need another wait_for_vblank in the IVB
> specific update_plane hook, and this way we don't need to worry about
> struct_mutex there either.
> 
> Also move the intel_plane->obj=NULL assignment outside strut_mutex in
> disable_plane to make it clear that it's not protected by struct_mutex.

intel_update_fbc() needs to be taken out and shot. It needs the mode
lock, crtc lock and the struct_mutex.

This patch looks fine, but anything touching fbc just makes me want to
curl up in a corner and whimper. Friends don't let friends enable fbc!
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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