From: Eugeni Dodonov Date: Fri, 23 Mar 2012 14:57:18 +0000 (-0300) Subject: drm/i915: allow to select rc6 modes via kernel parameter X-Git-Tag: v3.4-rc2~32^2^2~10 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=83b7f9ac9126f0532ca34c14e4f0582c565c6b0d;p=pandora-kernel.git drm/i915: allow to select rc6 modes via kernel parameter This allows to select which rc6 modes are to be used via kernel parameter, via a bitmask parameter. E.g.: - to enable rc6, i915_enable_rc6=1 - to enable rc6 and deep rc6, i915_enable_rc6=3 - to enable rc6 and deepest rc6, use i915_enable_rc6=5 - to enable rc6, deep and deepest rc6, use i915_enable_rc6=7 Please keep in mind that the deepest RC6 state really should NOT be used by default, as it could potentially worsen the issues with deep RC6. So do enable it only when you know what you are doing. However, having it around could help solving possible future rc6-related issues and their debugging on user machines. Note that this changes behavior - previously, value of 1 would enable both RC6 and deep RC6. Now it should only enable RC6 and deep/deepest RC6 stages must be enabled manually. v2: address Chris Wilson comments and clean up the code. References: https://bugs.freedesktop.org/show_bug.cgi?id=42579 Reviewed-by: Chris Wilson Reviewed-by: Ben Widawsky Signed-off-by: Eugeni Dodonov Signed-off-by: Daniel Vetter --- Reading git-diff-tree failed