drm/i915: change coding style of the write_infoframe functions

Don't use intermediate variables, change the value of 'val' as we go
through the function. The new style looks more similar to the rest of
our code. IMHO, it's also easier to read and change.
Signed-off-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_hdmi.c

@@ -120,32 +120,33 @@ static void i9xx_write_infoframe(struct drm_encoder *encoder,
 	struct drm_device *dev = encoder->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
-	u32 port, flags, val = I915_READ(VIDEO_DIP_CTL);
+	u32 val = I915_READ(VIDEO_DIP_CTL);
 	unsigned i, len = DIP_HEADER_SIZE + frame->len;
 
 
 	/* XXX first guess at handling video port, is this corrent? */
 	if (intel_hdmi->sdvox_reg == SDVOB)
-		port = VIDEO_DIP_PORT_B;
+		val |= VIDEO_DIP_PORT_B;
 	else if (intel_hdmi->sdvox_reg == SDVOC)
-		port = VIDEO_DIP_PORT_C;
+		val |= VIDEO_DIP_PORT_C;
 	else
 		return;
 
-	flags = intel_infoframe_index(frame);
-
 	val &= ~VIDEO_DIP_SELECT_MASK;
+	val |= intel_infoframe_index(frame);
+
+	val |= VIDEO_DIP_ENABLE;
 
-	I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | val | port | flags);
+	I915_WRITE(VIDEO_DIP_CTL, val);
 
 	for (i = 0; i < len; i += 4) {
 		I915_WRITE(VIDEO_DIP_DATA, *data);
 		data++;
 	}
 
-	flags |= intel_infoframe_flags(frame);
+	val |= intel_infoframe_flags(frame);
 
-	I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | val | port | flags);
+	I915_WRITE(VIDEO_DIP_CTL, val);
 }
 
 static void ironlake_write_infoframe(struct drm_encoder *encoder,
@@ -158,24 +159,25 @@ static void ironlake_write_infoframe(struct drm_encoder *encoder,
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	int reg = TVIDEO_DIP_CTL(intel_crtc->pipe);
 	unsigned i, len = DIP_HEADER_SIZE + frame->len;
-	u32 flags, val = I915_READ(reg);
+	u32 val = I915_READ(reg);
 
 	intel_wait_for_vblank(dev, intel_crtc->pipe);
 
-	flags = intel_infoframe_index(frame);
-
 	val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
+	val |= intel_infoframe_index(frame);
 
-	I915_WRITE(reg, VIDEO_DIP_ENABLE | val | flags);
+	val |= VIDEO_DIP_ENABLE;
+
+	I915_WRITE(reg, val);
 
 	for (i = 0; i < len; i += 4) {
 		I915_WRITE(TVIDEO_DIP_DATA(intel_crtc->pipe), *data);
 		data++;
 	}
 
-	flags |= intel_infoframe_flags(frame);
+	val |= intel_infoframe_flags(frame);
 
-	I915_WRITE(reg, VIDEO_DIP_ENABLE | val | flags);
+	I915_WRITE(reg, val);
 }
 
 static void vlv_write_infoframe(struct drm_encoder *encoder,
@@ -188,24 +190,25 @@ static void vlv_write_infoframe(struct drm_encoder *encoder,
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	int reg = VLV_TVIDEO_DIP_CTL(intel_crtc->pipe);
 	unsigned i, len = DIP_HEADER_SIZE + frame->len;
-	u32 flags, val = I915_READ(reg);
+	u32 val = I915_READ(reg);
 
 	intel_wait_for_vblank(dev, intel_crtc->pipe);
 
-	flags = intel_infoframe_index(frame);
-
 	val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
+	val |= intel_infoframe_index(frame);
+
+	val |= VIDEO_DIP_ENABLE;
 
-	I915_WRITE(reg, VIDEO_DIP_ENABLE | val | flags);
+	I915_WRITE(reg, val);
 
 	for (i = 0; i < len; i += 4) {
 		I915_WRITE(VLV_TVIDEO_DIP_DATA(intel_crtc->pipe), *data);
 		data++;
 	}
 
-	flags |= intel_infoframe_flags(frame);
+	val |= intel_infoframe_flags(frame);
 
-	I915_WRITE(reg, VIDEO_DIP_ENABLE | val | flags);
+	I915_WRITE(reg, val);
 }
 
 static void intel_set_infoframe(struct drm_encoder *encoder,