drm/i915: Introduce intel_set_rps()

Replace the valleyview_set_rps() and gen6_set_rps() calls with
intel_set_rps() which itself does the IS_VALLEYVIEW() check. The
code becomes simpler since the callers don't have to do this check
themselves.

Most of the change was performe with the following semantic patch:
@@
expression E1, E2, E3;
@@
- if (IS_VALLEYVIEW(E1)) {
-  valleyview_set_rps(E2, E3);
- } else {
-  gen6_set_rps(E2, E3);
- }
+ intel_set_rps(E2, E3);

Adding intel_set_rps() and making valleyview_set_rps() and gen6_set_rps()
static was done manually. Also valleyview_set_rps() had to be moved a
bit avoid a forward declaration.

v2: Use a less greedy semantic patch

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_debugfs.c

@@ -4214,10 +4214,7 @@ i915_max_freq_set(void *data, u64 val)
 
 	dev_priv->rps.max_freq_softlimit = val;
 
-	if (IS_VALLEYVIEW(dev))
-		valleyview_set_rps(dev, val);
-	else
-		gen6_set_rps(dev, val);
+	intel_set_rps(dev, val);
 
 	mutex_unlock(&dev_priv->rps.hw_lock);
 
@@ -4292,10 +4289,7 @@ i915_min_freq_set(void *data, u64 val)
 
 	dev_priv->rps.min_freq_softlimit = val;
 
-	if (IS_VALLEYVIEW(dev))
-		valleyview_set_rps(dev, val);
-	else
-		gen6_set_rps(dev, val);
+	intel_set_rps(dev, val);
 
 	mutex_unlock(&dev_priv->rps.hw_lock);
 

drivers/gpu/drm/i915/i915_drv.h

@@ -3183,8 +3183,7 @@ extern void i915_redisable_vga(struct drm_device *dev);
 extern void i915_redisable_vga_power_on(struct drm_device *dev);
 extern bool ironlake_set_drps(struct drm_device *dev, u8 val);
 extern void intel_init_pch_refclk(struct drm_device *dev);
-extern void gen6_set_rps(struct drm_device *dev, u8 val);
-extern void valleyview_set_rps(struct drm_device *dev, u8 val);
+extern void intel_set_rps(struct drm_device *dev, u8 val);
 extern void intel_set_memory_cxsr(struct drm_i915_private *dev_priv,
 				  bool enable);
 extern void intel_detect_pch(struct drm_device *dev);

drivers/gpu/drm/i915/i915_irq.c

@@ -1243,10 +1243,7 @@ static void gen6_pm_rps_work(struct work_struct *work)
 
 	dev_priv->rps.last_adj = new_delay - dev_priv->rps.cur_freq;
 
-	if (IS_VALLEYVIEW(dev_priv->dev))
-		valleyview_set_rps(dev_priv->dev, new_delay);
-	else
-		gen6_set_rps(dev_priv->dev, new_delay);
+	intel_set_rps(dev_priv->dev, new_delay);
 
 	mutex_unlock(&dev_priv->rps.hw_lock);
 }

drivers/gpu/drm/i915/i915_sysfs.c

@@ -402,10 +402,7 @@ static ssize_t gt_max_freq_mhz_store(struct device *kdev,
 	/* We still need *_set_rps to process the new max_delay and
 	 * update the interrupt limits and PMINTRMSK even though
 	 * frequency request may be unchanged. */
-	if (IS_VALLEYVIEW(dev))
-		valleyview_set_rps(dev, val);
-	else
-		gen6_set_rps(dev, val);
+	intel_set_rps(dev, val);
 
 	mutex_unlock(&dev_priv->rps.hw_lock);
 
@@ -464,10 +461,7 @@ static ssize_t gt_min_freq_mhz_store(struct device *kdev,
 	/* We still need *_set_rps to process the new min_delay and
 	 * update the interrupt limits and PMINTRMSK even though
 	 * frequency request may be unchanged. */
-	if (IS_VALLEYVIEW(dev))
-		valleyview_set_rps(dev, val);
-	else
-		gen6_set_rps(dev, val);
+	intel_set_rps(dev, val);
 
 	mutex_unlock(&dev_priv->rps.hw_lock);
 

drivers/gpu/drm/i915/intel_pm.c

@@ -3750,7 +3750,7 @@ static u32 gen6_rps_pm_mask(struct drm_i915_private *dev_priv, u8 val)
 /* gen6_set_rps is called to update the frequency request, but should also be
  * called when the range (min_delay and max_delay) is modified so that we can
  * update the GEN6_RP_INTERRUPT_LIMITS register accordingly. */
-void gen6_set_rps(struct drm_device *dev, u8 val)
+static void gen6_set_rps(struct drm_device *dev, u8 val)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
@@ -3786,6 +3786,27 @@ void gen6_set_rps(struct drm_device *dev, u8 val)
 	trace_intel_gpu_freq_change(val * 50);
 }
 
+static void valleyview_set_rps(struct drm_device *dev, u8 val)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+
+	WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
+	WARN_ON(val > dev_priv->rps.max_freq_softlimit);
+	WARN_ON(val < dev_priv->rps.min_freq_softlimit);
+
+	if (WARN_ONCE(IS_CHERRYVIEW(dev) && (val & 1),
+		      "Odd GPU freq value\n"))
+		val &= ~1;
+
+	if (val != dev_priv->rps.cur_freq)
+		vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ, val);
+
+	I915_WRITE(GEN6_PMINTRMSK, gen6_rps_pm_mask(dev_priv, val));
+
+	dev_priv->rps.cur_freq = val;
+	trace_intel_gpu_freq_change(intel_gpu_freq(dev_priv, val));
+}
+
 /* vlv_set_rps_idle: Set the frequency to Rpn if Gfx clocks are down
  *
  * * If Gfx is Idle, then
@@ -3850,38 +3871,20 @@ void gen6_rps_idle(struct drm_i915_private *dev_priv)
 
 void gen6_rps_boost(struct drm_i915_private *dev_priv)
 {
-	struct drm_device *dev = dev_priv->dev;
-
 	mutex_lock(&dev_priv->rps.hw_lock);
 	if (dev_priv->rps.enabled) {
-		if (IS_VALLEYVIEW(dev))
-			valleyview_set_rps(dev_priv->dev, dev_priv->rps.max_freq_softlimit);
-		else
-			gen6_set_rps(dev_priv->dev, dev_priv->rps.max_freq_softlimit);
+		intel_set_rps(dev_priv->dev, dev_priv->rps.max_freq_softlimit);
 		dev_priv->rps.last_adj = 0;
 	}
 	mutex_unlock(&dev_priv->rps.hw_lock);
 }
 
-void valleyview_set_rps(struct drm_device *dev, u8 val)
+void intel_set_rps(struct drm_device *dev, u8 val)
 {
-	struct drm_i915_private *dev_priv = dev->dev_private;
-
-	WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
-	WARN_ON(val > dev_priv->rps.max_freq_softlimit);
-	WARN_ON(val < dev_priv->rps.min_freq_softlimit);
-
-	if (WARN_ONCE(IS_CHERRYVIEW(dev) && (val & 1),
-		      "Odd GPU freq value\n"))
-		val &= ~1;
-
-	if (val != dev_priv->rps.cur_freq)
-		vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ, val);
-
-	I915_WRITE(GEN6_PMINTRMSK, gen6_rps_pm_mask(dev_priv, val));
-
-	dev_priv->rps.cur_freq = val;
-	trace_intel_gpu_freq_change(intel_gpu_freq(dev_priv, val));
+	if (IS_VALLEYVIEW(dev))
+		valleyview_set_rps(dev, val);
+	else
+		gen6_set_rps(dev, val);
 }
 
 static void gen9_disable_rps(struct drm_device *dev)