tree 74f679459d3c1e6d5194ac7a4a55f9a347ea3647
parent 7a9c906094de8b3dc227de448019dbc386cd25d4
author Daniel Vetter <daniel.vetter@ffwll.ch> 1253048252 +0200
committer Eric Anholt <eric@anholt.net> 1257461227 -0800

drm/i915: add i915_lp_ring_sync helper

This just waits until the hw passed the current ring position with
cmd execution. This slightly changes the existing i915_wait_request
function to make uninterruptible waiting possible - no point in
returning to userspace while mucking around with the overlay, that
piece of hw is just too fragile.

Also replace a magic 0 with the symbolic constant (and kill the then
superflous comment) while I was looking at the code.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Eric Anholt <eric@anholt.net>