From: Damien Lespiau Date: Fri, 7 Jun 2013 16:41:14 +0000 (+0100) Subject: drm/i915: Don't try to calculate RC6 residency on GEN4 and before X-Git-Tag: v3.12-rc2~3^2~143^2~57 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=eb4926e4a6e3922398fd6880f07a84db95aa3741;p=kernel%2Fkernel-generic.git drm/i915: Don't try to calculate RC6 residency on GEN4 and before intel_enable_rc6() is used to check if we can compute the RC6 residency in the sysfs code. Disable this for platforms older than Ironlake. Signed-off-by: Damien Lespiau Reviewed-by: Paulo Zanoni Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 9b95f78..e81d376 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3167,6 +3167,10 @@ static void valleyview_disable_rps(struct drm_device *dev) int intel_enable_rc6(const struct drm_device *dev) { + /* No RC6 before Ironlake */ + if (INTEL_INFO(dev)->gen < 5) + return 0; + /* Respect the kernel parameter if it is set */ if (i915_enable_rc6 >= 0) return i915_enable_rc6;