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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-02-02 09:58:12 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-02-08 23:16:24 +0100 |
| commit | f691e2f4cec334e906f971471b3bf1460c6256d4 (patch) | |
| tree | 1397e4e39cc1322b3458365e8b10aeca71f8383f /drivers/gpu/drm/i915/i915_drv.h | |
| parent | 172975aa746e155533cb386c7159c2d6510e2bc8 (diff) | |
| download | lwn-f691e2f4cec334e906f971471b3bf1460c6256d4.tar.gz lwn-f691e2f4cec334e906f971471b3bf1460c6256d4.zip | |
drm/i915: swizzling support for snb/ivb
We have to do this manually. Somebody had a Great Idea.
I've measured speed-ups just a few percent above the noise level
(below 5% for the best case), but no slowdows. Chris Wilson measured
quite a bit more (10-20% above the usual snb variance) on a more
recent and better tuned version of sna, but also recorded a few
slow-downs on benchmarks know for uglier amounts of snb-induced
variance.
v2: Incorporate Ben Widawsky's preliminary review comments and
elaborate a bit about the performance impact in the changelog.
v3: Add a comment as to why we don't need to check the 3rd memory
channel.
v4: Fixup whitespace.
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_drv.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 865de800756d..08454192c4c7 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1187,7 +1187,8 @@ int __must_check i915_gem_object_set_domain(struct drm_i915_gem_object *obj, uint32_t read_domains, uint32_t write_domain); int __must_check i915_gem_object_finish_gpu(struct drm_i915_gem_object *obj); -int __must_check i915_gem_init_ringbuffer(struct drm_device *dev); +int __must_check i915_gem_init_hw(struct drm_device *dev); +void i915_gem_init_swizzling(struct drm_device *dev); void i915_gem_cleanup_ringbuffer(struct drm_device *dev); void i915_gem_do_init(struct drm_device *dev, unsigned long start, |