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| author |   Kenneth Graunke <kenneth@whitecape.org> | 2015-01-10 18:02:22 -0800 |
|---|---|---|
| committer |   Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-01-13 00:16:53 +0100 |
| commit | d60de81da48aa25b06a015b839906243710e7253 (patch) | |
| tree | a031d13bfc72e85b0bbf1f4e3222b5fd9c52f98f /drivers/gpu/drm/i915/intel_ringbuffer.c | |
| parent | drm/i915: Reset CSB read pointer in ring init (diff) | |
| download | linux-dev-d60de81da48aa25b06a015b839906243710e7253.tar.xz linux-dev-d60de81da48aa25b06a015b839906243710e7253.zip | |
drm/i915: Improve HiZ throughput on Cherryview.
Found by reading the HIZ_CHICKEN documentation.
Improves performance in a HiZ microbenchmark by around 50%.
Improves performance in OglZBuffer by around 18%.
Thanks to Chris Wilson for helping me figure out where to put this.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ringbuffer.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 12a36f0ca53d..dabc1d8d2ae3 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -836,6 +836,9 @@ static int chv_init_workarounds(struct intel_engine_cs *ring) HDC_FORCE_NON_COHERENT | HDC_DONOT_FETCH_MEM_WHEN_MASKED); + /* Improve HiZ throughput on CHV. */ + WA_SET_BIT_MASKED(HIZ_CHICKEN, CHV_HZ_8X8_MODE_IN_1X); + return 0; } |