]> git.baikalelectronics.ru Git - kernel.git/commit
drm/i915: Workaround to bump rc6 voltage to 450
authorBen Widawsky <ben@bwidawsk.net>
Wed, 26 Sep 2012 17:34:01 +0000 (10:34 -0700)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Tue, 16 Oct 2012 07:23:52 +0000 (09:23 +0200)
commitc12b0c07883452d7b635bdd7988d8a1d84f03b38
tree196ed22098e3f2a3890ff53165c038e264b7f85b
parentf224cb30d33c42601d8922dba12b85f920f94491
drm/i915: Workaround to bump rc6 voltage to 450

BIOS should be setting the minimum voltage for rc6 to be 450mV. Old or
buggy BIOSen may not be doing this, so we correct it for them. Ideally
customers should update the BIOS as only it would know the optimal
values for the platform, so we leave that fact as a DRM_ERROR for the
user to see.

Unfortunately this isn't fixing any of the issues it was targeted to
fix, but it is documented that we must do it.

CC: Jesse Barnes <jbarnes@virtuousgeek.org>
CC: Matt Turner <mattst88@gmail.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
[danvet: bikeshedded loglevel of the "your bios is broken message" to
debug.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/i915_reg.h
drivers/gpu/drm/i915/intel_pm.c