From eb4926e4a6e3922398fd6880f07a84db95aa3741 Mon Sep 17 00:00:00 2001
From: Damien Lespiau <damien.lespiau@intel.com>
Date: Fri, 7 Jun 2013 17:41:14 +0100
Subject: [PATCH] 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 <damien.lespiau@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
drivers/gpu/drm/i915/intel_pm.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 9b95f78d352a..e81d37667bc9 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;
--
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