From: Akash Goel <akash.goel@xxxxxxxxx>
RP Interrupt Up/Down Frequency Limits register (A014) definition
has changed for SKL. Updated the gen6_rps_limits function as per that
Signed-off-by: Akash Goel <akash.goel@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_pm.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 215b200..db24b48 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3623,7 +3623,7 @@ static void ironlake_disable_drps(struct drm_device *dev)
* ourselves, instead of doing a rmw cycle (which might result in us clearing
* all limits and the gpu stuck at whatever frequency it is at atm).
*/
-static u32 gen6_rps_limits(struct drm_i915_private *dev_priv, u8 val)
+static u32 get_rps_limits(struct drm_i915_private *dev_priv, u8 val)
{
u32 limits;
@@ -3633,9 +3633,15 @@ static u32 gen6_rps_limits(struct drm_i915_private *dev_priv, u8 val)
* the hw runs at the minimal clock before selecting the desired
* frequency, if the down threshold expires in that window we will not
* receive a down interrupt. */
- limits = dev_priv->rps.max_freq_softlimit << 24;
- if (val <= dev_priv->rps.min_freq_softlimit)
- limits |= dev_priv->rps.min_freq_softlimit << 16;
+ if (IS_GEN9(dev_priv->dev)) {
+ limits = (dev_priv->rps.max_freq_softlimit * GEN9_FREQ_SCALER) << 23;
+ if (val <= dev_priv->rps.min_freq_softlimit)
+ limits |= (dev_priv->rps.min_freq_softlimit * GEN9_FREQ_SCALER) << 14;
+ } else {
+ limits = dev_priv->rps.max_freq_softlimit << 24;
+ if (val <= dev_priv->rps.min_freq_softlimit)
+ limits |= dev_priv->rps.min_freq_softlimit << 16;
+ }
return limits;
}
@@ -3778,7 +3784,7 @@ static void gen6_set_rps(struct drm_device *dev, u8 val)
/* Make sure we continue to get interrupts
* until we hit the minimum or maximum frequencies.
*/
- I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, gen6_rps_limits(dev_priv, val));
+ I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, get_rps_limits(dev_priv, val));
I915_WRITE(GEN6_PMINTRMSK, gen6_rps_pm_mask(dev_priv, val));
POSTING_READ(GEN6_RPNSWREQ);
--
1.9.2
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