[PATCH 26/71] drm/i915: Enable PM Interrupts for CHV/BDW Platform.

[ville.syrjala@xxxxxxxxxxxxxxx]

From: Deepak S <deepak.s@xxxxxxxxx>

v2: Remove vfuncs and add if else block to differentiate platform
(Daniel)

Signed-off-by: Deepak S <deepak.s@xxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_irq.c | 49 +++++++++++++++++++++++++++++++++++++++--
 1 file changed, 47 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 1581b3d..6cf97c4 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -37,6 +37,9 @@
 #include "i915_trace.h"
 #include "intel_drv.h"
 
+
+static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir);
+
 static const u32 hpd_ibx[] = {
 	[HPD_CRT] = SDE_CRT_HOTPLUG,
 	[HPD_SDVO_B] = SDE_SDVOB_HOTPLUG,
@@ -154,6 +157,32 @@ void ilk_disable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
 }
 
 /**
+ * gen8_update_pm_irq - update GEN8_GT_IMR
+ * @dev_priv: driver private
+ * @interrupt_mask: mask of interrupt bits to update
+ * @enabled_irq_mask: mask of interrupt bits to enable
+ * */
+
+static void gen8_update_pm_irq(struct drm_i915_private *dev_priv,
+					uint32_t interrupt_mask,
+					uint32_t enabled_irq_mask)
+{
+	uint32_t new_val;
+
+	assert_spin_locked(&dev_priv->irq_lock);
+
+	new_val = dev_priv->pm_irq_mask;
+	new_val &= ~interrupt_mask;
+	new_val |= (~enabled_irq_mask & interrupt_mask);
+
+	if (new_val != dev_priv->pm_irq_mask) {
+		dev_priv->pm_irq_mask = new_val;
+		I915_WRITE(GEN8_GT_IMR(2), dev_priv->pm_irq_mask);
+		POSTING_READ(GEN8_GT_IMR(2));
+	}
+}
+
+/**
   * snb_update_pm_irq - update GEN6_PMIMR
   * @dev_priv: driver private
   * @interrupt_mask: mask of interrupt bits to update
@@ -188,12 +217,18 @@ static void snb_update_pm_irq(struct drm_i915_private *dev_priv,
 
 void snb_enable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
 {
-	snb_update_pm_irq(dev_priv, mask, mask);
+	if (IS_GEN8(dev_priv->dev))
+		gen8_update_pm_irq(dev_priv, mask, mask);
+	else
+		snb_update_pm_irq(dev_priv, mask, mask);
 }
 
 void snb_disable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
 {
-	snb_update_pm_irq(dev_priv, mask, 0);
+	if (IS_GEN8(dev_priv->dev))
+		gen8_update_pm_irq(dev_priv, mask, 0);
+	else
+		snb_update_pm_irq(dev_priv, mask, 0);
 }
 
 static bool ivb_can_enable_err_int(struct drm_device *dev)
@@ -1341,6 +1376,9 @@ static irqreturn_t gen8_gt_irq_handler(struct drm_device *dev,
 	u32 rcs, bcs, vcs;
 	uint32_t tmp = 0;
 	irqreturn_t ret = IRQ_NONE;
+	u32 pm_iir;
+
+	pm_iir = I915_READ(GEN8_GT_IIR(2));
 
 	if (master_ctl & (GEN8_GT_RCS_IRQ | GEN8_GT_BCS_IRQ)) {
 		tmp = I915_READ(GEN8_GT_IIR(0));
@@ -1381,6 +1419,12 @@ static irqreturn_t gen8_gt_irq_handler(struct drm_device *dev,
 			DRM_ERROR("The master control interrupt lied (GT3)!\n");
 	}
 
+
+	if (pm_iir)
+		gen6_rps_irq_handler(dev_priv, pm_iir);
+
+	I915_WRITE(GEN8_GT_IIR(2), pm_iir);
+
 	return ret;
 }
 
@@ -1796,6 +1840,7 @@ static irqreturn_t cherryview_irq_handler(int irq, void *arg)
 		ret = IRQ_HANDLED;
 	}
 
+
 	I915_WRITE(VLV_IIR, iir);
 
 	I915_WRITE(GEN8_MASTER_IRQ, DE_MASTER_IRQ_CONTROL);
-- 
1.8.3.2

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