[Bug 45092] [965GM] broken swizzling in swap-in/out paths/L-shaped memory swizzling

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=45092

--- Comment #37 from Janus Troelsen <ysangkok at gmail.com> ---
I was wrong, DebugWait didn't help. I disabled DebugWait again of course.

It looks as if upgrading to kernel v3.19-rc1 did though.

I got the kernel here:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.19-rc1-vivid/

However, the commit ID of the patch doesn't match the one Daniel Vetter gave
above. I found this though, with the same commit description:
https://github.com/torvalds/linux/commit/656bfa3afc14e45e2d9e1624bf60d79b3beb12f2

In debugfs, I can see that the new code paths are getting hit:

# cat /sys/kernel/debug/dri/0/i915_swizzle_info
bit6 swizzle for X-tiling = bit9/bit10/bit11
bit6 swizzle for Y-tiling = bit9/bit11
DDC = 0x000f0002
DDC2 = 0x00000000
C0DRB3 = 0x0000
C1DRB3 = 0x0000
L-shaped memory detected

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