drm/i915: Only attempt to pass the first request to execlists
authorChris Wilson <chris@chris-wilson.co.uk>
Tue, 24 Jan 2017 11:00:07 +0000 (11:00 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Tue, 24 Jan 2017 16:00:13 +0000 (16:00 +0000)
commit3833281adb0f01ca5b279664d14611d8ed1deb98
treecc7d1deb25f79f0d51d7dd32d9a53b35f82b3826
parenta37951ac9f9642819e400814f6f30689db233c24
drm/i915: Only attempt to pass the first request to execlists

Only the first request added to the execlist queue can be submitted. If
this request is not the first request on the queue, it means that there
are already higher priority requests waiting upon the tasklet and
kicking it will make no difference.

This is more relevant for a later patch, where we more eagerly try and
kick the tasklet to handle the submission of new requests.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170124110009.28947-6-chris@chris-wilson.co.uk
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
drivers/gpu/drm/i915/intel_lrc.c