drm/i915: don't specify the IRQ register in the gen2 macros

Like the gen3+ macros, the gen2 versions of the IRQ initialization
macros take the register name in the 'type' argument. But gen2 only
has one set of registers, so there's really no need to specify the
type. This commit removes the type argument and uses the registers
directly instead of passing them through variables.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190410235344.31199-3-paulo.r.zanoni@intel.com

drivers/gpu/drm/i915/i915_irq.c

@@ -151,19 +151,18 @@ static void gen3_irq_reset(struct drm_i915_private *dev_priv, i915_reg_t imr,
 	POSTING_READ(iir);
 }
 
-static void gen2_irq_reset(struct drm_i915_private *dev_priv, i915_reg_t imr,
-			   i915_reg_t iir, i915_reg_t ier)
+static void gen2_irq_reset(struct drm_i915_private *dev_priv)
 {
-	I915_WRITE16(imr, 0xffff);
-	POSTING_READ16(imr);
+	I915_WRITE16(IMR, 0xffff);
+	POSTING_READ16(IMR);
 
-	I915_WRITE16(ier, 0);
+	I915_WRITE16(IER, 0);
 
 	/* IIR can theoretically queue up two events. Be paranoid. */
-	I915_WRITE16(iir, 0xffff);
-	POSTING_READ16(iir);
-	I915_WRITE16(iir, 0xffff);
-	POSTING_READ16(iir);
+	I915_WRITE16(IIR, 0xffff);
+	POSTING_READ16(IIR);
+	I915_WRITE16(IIR, 0xffff);
+	POSTING_READ16(IIR);
 }
 
 #define GEN8_IRQ_RESET_NDX(type, which) \
@@ -176,8 +175,8 @@ static void gen2_irq_reset(struct drm_i915_private *dev_priv, i915_reg_t imr,
 #define GEN3_IRQ_RESET(type) \
 	gen3_irq_reset(dev_priv, type##IMR, type##IIR, type##IER)
 
-#define GEN2_IRQ_RESET(type) \
-	gen2_irq_reset(dev_priv, type##IMR, type##IIR, type##IER)
+#define GEN2_IRQ_RESET() \
+	gen2_irq_reset(dev_priv)
 
 /*
  * We should clear IMR at preinstall/uninstall, and just check at postinstall.
@@ -198,20 +197,19 @@ static void gen3_assert_iir_is_zero(struct drm_i915_private *dev_priv,
 	POSTING_READ(reg);
 }
 
-static void gen2_assert_iir_is_zero(struct drm_i915_private *dev_priv,
-				    i915_reg_t reg)
+static void gen2_assert_iir_is_zero(struct drm_i915_private *dev_priv)
 {
-	u16 val = I915_READ16(reg);
+	u16 val = I915_READ16(IIR);
 
 	if (val == 0)
 		return;
 
 	WARN(1, "Interrupt register 0x%x is not zero: 0x%08x\n",
-	     i915_mmio_reg_offset(reg), val);
-	I915_WRITE16(reg, 0xffff);
-	POSTING_READ16(reg);
-	I915_WRITE16(reg, 0xffff);
-	POSTING_READ16(reg);
+	     i915_mmio_reg_offset(IIR), val);
+	I915_WRITE16(IIR, 0xffff);
+	POSTING_READ16(IIR);
+	I915_WRITE16(IIR, 0xffff);
+	POSTING_READ16(IIR);
 }
 
 static void gen3_irq_init(struct drm_i915_private *dev_priv,
@@ -227,15 +225,13 @@ static void gen3_irq_init(struct drm_i915_private *dev_priv,
 }
 
 static void gen2_irq_init(struct drm_i915_private *dev_priv,
-			  i915_reg_t imr, u32 imr_val,
-			  i915_reg_t ier, u32 ier_val,
-			  i915_reg_t iir)
+			  u32 imr_val, u32 ier_val)
 {
-	gen2_assert_iir_is_zero(dev_priv, iir);
+	gen2_assert_iir_is_zero(dev_priv);
 
-	I915_WRITE16(ier, ier_val);
-	I915_WRITE16(imr, imr_val);
-	POSTING_READ16(imr);
+	I915_WRITE16(IER, ier_val);
+	I915_WRITE16(IMR, imr_val);
+	POSTING_READ16(IMR);
 }
 
 #define GEN8_IRQ_INIT_NDX(type, which, imr_val, ier_val) \
@@ -253,11 +249,8 @@ static void gen2_irq_init(struct drm_i915_private *dev_priv,
 		      type##IER, ier_val, \
 		      type##IIR)
 
-#define GEN2_IRQ_INIT(type, imr_val, ier_val) \
-	gen2_irq_init(dev_priv, \
-		      type##IMR, imr_val, \
-		      type##IER, ier_val, \
-		      type##IIR)
+#define GEN2_IRQ_INIT(imr_val, ier_val) \
+	gen2_irq_init(dev_priv, imr_val, ier_val)
 
 static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir);
 static void gen9_guc_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir);
@@ -4263,7 +4256,7 @@ static int i8xx_irq_postinstall(struct drm_device *dev)
 		I915_MASTER_ERROR_INTERRUPT |
 		I915_USER_INTERRUPT;
 
-	GEN2_IRQ_INIT(, dev_priv->irq_mask, enable_mask);
+	GEN2_IRQ_INIT(dev_priv->irq_mask, enable_mask);
 
 	/* Interrupt setup is already guaranteed to be single-threaded, this is
 	 * just to make the assert_spin_locked check happy. */