]> git.baikalelectronics.ru Git - kernel.git/commit
projects / kernel.git / commit
? search:
summary | shortlog | log | commit | commitdiff | tree
(parent: 570b83b) | patch
drm/i915/ringbuffer: set FORCE_WAKE bit before reading ring register
authorZou Nan hai <nanhai.zou@intel.com>
Tue, 9 Nov 2010 09:17:32 +0000 (17:17 +0800)
committerChris Wilson <chris@chris-wilson.co.uk>
Thu, 11 Nov 2010 17:45:54 +0000 (17:45 +0000)
commit5307e2cd424f25337302413de8ec1d5c9f6e290e
tree7a6789974c1e5d2f76cf21fb6c8fd1df8711c2abtree | snapshot
parent570b83b8d0605acfd0e7b03e7b8ac349d79fc77ecommit | diff
drm/i915/ringbuffer: set FORCE_WAKE bit before reading ring register

Before reading ring register, set FORCE_WAKE bit to prevent GT core
power down to low power state, otherwise we may read stale values.

Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>
[ickle: added a udelay which seemed to do the trick on my SNB]
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
drivers/gpu/drm/i915/i915_drv.h diff | blob | history
drivers/gpu/drm/i915/i915_reg.h diff | blob | history
drivers/gpu/drm/i915/intel_ringbuffer.c diff | blob | history
drivers/gpu/drm/i915/intel_ringbuffer.h diff | blob | history
Linux Kernel Source Tree.