drm/i915: unify gen6/gen8 rps irq enable/disable

The GEN6 and GEN8 versions differ only in the PM IIR and IER register
addresses and that on GEN8 we need to keep the
GEN8_PMINTR_REDIRECT_TO_NON_DISP PM interrupt unmasked. Abstract away
these 3 things in the GEN6 versions of the helpers and use them
everywhere.

No functional change.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 9851af7..ad4ffa9 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4519,24 +4519,14 @@ void valleyview_set_rps(struct drm_device *dev, u8 val)
        trace_intel_gpu_freq_change(vlv_gpu_freq(dev_priv, val));
 }
 
-static void gen8_disable_rps_interrupts(struct drm_device *dev)
+static u32 gen6_pm_iir(struct drm_i915_private *dev_priv)
 {
-       struct drm_i915_private *dev_priv = dev->dev_private;
-
-       I915_WRITE(GEN6_PMINTRMSK, ~GEN8_PMINTR_REDIRECT_TO_NON_DISP);
-       I915_WRITE(GEN8_GT_IER(2), I915_READ(GEN8_GT_IER(2)) &
-                                  ~dev_priv->pm_rps_events);
-       /* Complete PM interrupt masking here doesn't race with the rps work
-        * item again unmasking PM interrupts because that is using a different
-        * register (GEN8_GT_IMR(2)) to mask PM interrupts. The only risk is in
-        * leaving stale bits in GEN8_GT_IIR(2) and GEN8_GT_IMR(2) which
-        * gen8_enable_rps will clean up. */
-
-       spin_lock_irq(&dev_priv->irq_lock);
-       dev_priv->rps.pm_iir = 0;
-       spin_unlock_irq(&dev_priv->irq_lock);
+       return INTEL_INFO(dev_priv)->gen >= 8 ? GEN8_GT_IIR(2) : GEN6_PMIIR;
+}
 
-       I915_WRITE(GEN8_GT_IIR(2), dev_priv->pm_rps_events);
+static u32 gen6_pm_ier(struct drm_i915_private *dev_priv)
+{
+       return INTEL_INFO(dev_priv)->gen >= 8 ? GEN8_GT_IER(2) : GEN6_PMIER;
 }
 
 static void gen9_disable_rps(struct drm_device *dev)
@@ -4550,8 +4540,9 @@ static void gen6_disable_rps_interrupts(struct drm_device *dev)
 {
        struct drm_i915_private *dev_priv = dev->dev_private;
 
-       I915_WRITE(GEN6_PMINTRMSK, 0xffffffff);
-       I915_WRITE(GEN6_PMIER, I915_READ(GEN6_PMIER) &
+       I915_WRITE(GEN6_PMINTRMSK, INTEL_INFO(dev_priv)->gen >= 8 ?
+                  ~GEN8_PMINTR_REDIRECT_TO_NON_DISP : ~0);
+       I915_WRITE(gen6_pm_ier(dev_priv), I915_READ(gen6_pm_ier(dev_priv)) &
                                ~dev_priv->pm_rps_events);
        /* Complete PM interrupt masking here doesn't race with the rps work
         * item again unmasking PM interrupts because that is using a different
@@ -4562,7 +4553,7 @@ static void gen6_disable_rps_interrupts(struct drm_device *dev)
        dev_priv->rps.pm_iir = 0;
        spin_unlock_irq(&dev_priv->irq_lock);
 
-       I915_WRITE(GEN6_PMIIR, dev_priv->pm_rps_events);
+       I915_WRITE(gen6_pm_iir(dev_priv), dev_priv->pm_rps_events);
 }
 
 static void gen6_disable_rps(struct drm_device *dev)
@@ -4572,10 +4563,7 @@ static void gen6_disable_rps(struct drm_device *dev)
        I915_WRITE(GEN6_RC_CONTROL, 0);
        I915_WRITE(GEN6_RPNSWREQ, 1 << 31);
 
-       if (IS_BROADWELL(dev))
-               gen8_disable_rps_interrupts(dev);
-       else
-               gen6_disable_rps_interrupts(dev);
+       gen6_disable_rps_interrupts(dev);
 }
 
 static void cherryview_disable_rps(struct drm_device *dev)
@@ -4584,7 +4572,7 @@ static void cherryview_disable_rps(struct drm_device *dev)
 
        I915_WRITE(GEN6_RC_CONTROL, 0);
 
-       gen8_disable_rps_interrupts(dev);
+       gen6_disable_rps_interrupts(dev);
 }
 
 static void valleyview_disable_rps(struct drm_device *dev)
@@ -4663,17 +4651,6 @@ int intel_enable_rc6(const struct drm_device *dev)
        return i915.enable_rc6;
 }
 
-static void gen8_enable_rps_interrupts(struct drm_device *dev)
-{
-       struct drm_i915_private *dev_priv = dev->dev_private;
-
-       spin_lock_irq(&dev_priv->irq_lock);
-       WARN_ON(dev_priv->rps.pm_iir);
-       gen6_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
-       I915_WRITE(GEN8_GT_IIR(2), dev_priv->pm_rps_events);
-       spin_unlock_irq(&dev_priv->irq_lock);
-}
-
 static void gen6_enable_rps_interrupts(struct drm_device *dev)
 {
        struct drm_i915_private *dev_priv = dev->dev_private;
@@ -4681,7 +4658,7 @@ static void gen6_enable_rps_interrupts(struct drm_device *dev)
        spin_lock_irq(&dev_priv->irq_lock);
        WARN_ON(dev_priv->rps.pm_iir);
        gen6_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
-       I915_WRITE(GEN6_PMIIR, dev_priv->pm_rps_events);
+       I915_WRITE(gen6_pm_iir(dev_priv), dev_priv->pm_rps_events);
        spin_unlock_irq(&dev_priv->irq_lock);
 }
 
@@ -4823,7 +4800,7 @@ static void gen8_enable_rps(struct drm_device *dev)
 
        gen6_set_rps(dev, (I915_READ(GEN6_GT_PERF_STATUS) & 0xff00) >> 8);
 
-       gen8_enable_rps_interrupts(dev);
+       gen6_enable_rps_interrupts(dev);
 
        gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
 }
@@ -5414,7 +5391,7 @@ static void cherryview_enable_rps(struct drm_device *dev)
 
        valleyview_set_rps(dev_priv->dev, dev_priv->rps.efficient_freq);
 
-       gen8_enable_rps_interrupts(dev);
+       gen6_enable_rps_interrupts(dev);
 
        gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
 }