]> git.baikalelectronics.ru Git - kernel.git/commit
drm/i915/bdw: Use HSW formula for ring freq scaling
authorBen Widawsky <benjamin.widawsky@intel.com>
Sun, 3 Nov 2013 04:07:49 +0000 (21:07 -0700)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Fri, 8 Nov 2013 17:10:00 +0000 (18:10 +0100)
commit6bde7b5d57eb92633ac1cbf13a631f08b31199cf
tree77867779e99021b84fc3ee5f6dc0a8742c0fe5ac
parent7998b4b93bec827c67284e4ae4a883c3e4cdbdfb
drm/i915/bdw: Use HSW formula for ring freq scaling

The current formula we use for HSW is not what is in current docs.
However, changing to the HSW formula on my HSW does not improve power
usage, and decreases performance by about 5% in limited xonotic testing.

For gen8, until we know otherwise, or run experiments, let's use
the HSW formula - which should be the same used in the Windows driver
(and thus help make an apples-applies comparison) on gen8.

v2: Use >= 8 instead of > 7 to be consistent with all other gen
checks.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net> (v1)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/intel_pm.c