[Bug 89123] [SKL]igt/pm_rps/blocking fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89123

--- Comment #3 from Jesse Barnes <jbarnes at virtuousgeek.org> ---
This test passes if run individually, but fails if min-max-config-idle is run
first within the test.

Akash, can you take a look?  Maybe the turbo params are different enough on SKL
that we need to adjust the tests.  I had to apply this kernel patch as a
starting point:

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 288c9d2..3fe2164 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -6696,7 +6696,8 @@ static int chv_freq_opcode(struct drm_i915_private
*dev_pr
 int intel_gpu_freq(struct drm_i915_private *dev_priv, int val)
 {
        if (IS_GEN9(dev_priv->dev))
-               return (val * GT_FREQUENCY_MULTIPLIER) / GEN9_FREQ_SCALER;
+               return DIV_ROUND_CLOSEST(val * GT_FREQUENCY_MULTIPLIER,
+                       GEN9_FREQ_SCALER);
        else if (IS_CHERRYVIEW(dev_priv->dev))
                return chv_gpu_freq(dev_priv, val);
        else if (IS_VALLEYVIEW(dev_priv->dev))
@@ -6708,7 +6709,8 @@ int intel_gpu_freq(struct drm_i915_private *dev_priv, int 
 int intel_freq_opcode(struct drm_i915_private *dev_priv, int val)
 {
        if (IS_GEN9(dev_priv->dev))
-               return (val * GEN9_FREQ_SCALER) / GT_FREQUENCY_MULTIPLIER;
+               return DIV_ROUND_CLOSEST(val * GEN9_FREQ_SCALER,
+                       GT_FREQUENCY_MULTIPLIER);
        else if (IS_CHERRYVIEW(dev_priv->dev))
                return chv_freq_opcode(dev_priv, val);

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