diff options
| author | Kenneth Graunke | 2014-02-27 08:59:31 +0100 |
|---|---|---|
| committer | Daniel Vetter | 2014-03-05 21:30:29 +0100 |
| commit | 1411e6a57a1836ba8a3d4f17c8733b2fbaf0f005 (patch) | |
| tree | 6aaf52e8bdfe82e992859a3d5250464fb422c4d6 /drivers/gpu/drm/i915/intel_pm.c | |
| parent | drm/i915: Add a partial instruction shootdown workaround on Broadwell. (diff) | |
| download | kernel-qcow2-linux-1411e6a57a1836ba8a3d4f17c8733b2fbaf0f005.tar.gz kernel-qcow2-linux-1411e6a57a1836ba8a3d4f17c8733b2fbaf0f005.tar.xz kernel-qcow2-linux-1411e6a57a1836ba8a3d4f17c8733b2fbaf0f005.zip | |
drm/i915: Add thread stall DOP clock gating workaround on Broadwell.
Ben and I believe this will be necessary on production hardware.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
[danvet: Shuffle lines to group all ROW_CHICKEN writes and add a
cautious comment that this might not be needed on production hw.]
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_pm.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index f21c9f3ee643..bb2ca355c1b0 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4805,6 +4805,11 @@ static void gen8_init_clock_gating(struct drm_device *dev) I915_WRITE(GEN8_ROW_CHICKEN, _MASKED_BIT_ENABLE(PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE)); + /* WaDisableThreadStallDopClockGating:bdw */ + /* FIXME: Unclear whether we really need this on production bdw. */ + I915_WRITE(GEN8_ROW_CHICKEN, + _MASKED_BIT_ENABLE(STALL_DOP_GATING_DISABLE)); + /* * This GEN8_CENTROID_PIXEL_OPT_DIS W/A is only needed for * pre-production hardware |