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authorDaniel Vetter <[email protected]>2012-03-02 21:38:44 +0100
committerKenneth Graunke <[email protected]>2012-03-05 12:02:47 -0800
commitf172eae8b23d0612865895c52af745021ae20a4c (patch)
treed413276ee78be3f93e5dc896259245b722b3dd33 /src/egl/main/eglscreen.h
parent3ff04ea236d3ef53fe765ecee92a805357b7373e (diff)
i965: fixup W-tile offset computation to take swizzling into account
There's even a comment in the code containing the right swizzling computations! Previously this has not been noticed because we need to manually enabled swizzling on snb/ivb (kernel 3.4 will do that) and we don't use the separate stencil on ilk (where the bios enables swizzling). This fixes piglit ./bin/fbo-stencil readpixels GL_DEPTH32F_STENCIL8 -auto on recent drm-intel-next kernels. Also remove the comment about ivb, it's stale now. Swizzling detection is done by allocating a temporary x-tiled buffer object. Unfortunately kernels before v3.2 lie on snb/ivb because they claim that swizzling is enable, but it isn't. The kernel commit that fixes this for backport to pre-v3.2 is commit acc83eb5a1e0ae7dbbf89ca2a1a943ade224bb84 Author: Daniel Vetter <[email protected]> Date: Mon Sep 12 20:49:16 2011 +0200 drm/i915: fix swizzling on gen6+ But if the kernel doesn't lie, this now works on swizzling and not swizzling machines. NOTE: This is a candidate for the 8.0 branch. Reviewed-by: Eric Anholt <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
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