]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
drm/i915/selftests: Unconditionally do a chipset flush before emit_bb_start
authorChris Wilson <chris@chris-wilson.co.uk>
Mon, 6 Aug 2018 14:46:04 +0000 (15:46 +0100)
committerChris Wilson <chris@chris-wilson.co.uk>
Mon, 6 Aug 2018 19:34:49 +0000 (20:34 +0100)
commite6a59382924e2d007b554a2aebcd4445ebb01fef
tree0c22453c04666ac98b025e1a78f5a6c8e67a2095
parenta6476ebd4350d51146ef0492b4b06bc0d31e8827
drm/i915/selftests: Unconditionally do a chipset flush before emit_bb_start

Experience teaches us over and over again that coherency on Baytrail
requires the odd heavy hammer, and in particular clflush alone is not
enough to guarrantee that writes from the CPU are picked up by the CS.
Do as we do elsewhere and ensure we have an unconditional
i915_gem_chipset_flush() after writing to memory and submitting a batch
to HW.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107499
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180806144604.8346-1-chris@chris-wilson.co.uk
drivers/gpu/drm/i915/selftests/huge_pages.c