drm/i915: split ironlake_write_infoframe into ibx_ and cpt_

The registers are on the PCH, so use the PCH name instead of the CPU
name. Also, the way this function is implemented is really only for
CPT and PPT. For now, both functions have the same implementations:
the next patch will fix ibx_write_infoframe.

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

drivers/gpu/drm/i915/intel_hdmi.c

@@ -170,8 +170,48 @@ static void i9xx_write_infoframe(struct drm_encoder *encoder,
 	I915_WRITE(VIDEO_DIP_CTL, val);
 }
 
-static void ironlake_write_infoframe(struct drm_encoder *encoder,
-				     struct dip_infoframe *frame)
+static void ibx_write_infoframe(struct drm_encoder *encoder,
+				struct dip_infoframe *frame)
+{
+	uint32_t *data = (uint32_t *)frame;
+	struct drm_device *dev = encoder->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct drm_crtc *crtc = encoder->crtc;
+	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 val = I915_READ(reg);
+
+	intel_wait_for_vblank(dev, intel_crtc->pipe);
+
+	val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
+	val |= intel_infoframe_index(frame);
+
+	/* The DIP control register spec says that we need to update the AVI
+	 * infoframe without clearing its enable bit */
+	if (frame->type == DIP_TYPE_AVI)
+		val |= VIDEO_DIP_ENABLE_AVI;
+	else
+		val &= ~intel_infoframe_enable(frame);
+
+	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++;
+	}
+
+	val |= intel_infoframe_enable(frame);
+	val &= ~VIDEO_DIP_FREQ_MASK;
+	val |= intel_infoframe_frequency(frame);
+
+	I915_WRITE(reg, val);
+}
+
+static void cpt_write_infoframe(struct drm_encoder *encoder,
+				struct dip_infoframe *frame)
 {
 	uint32_t *data = (uint32_t *)frame;
 	struct drm_device *dev = encoder->dev;
@@ -627,8 +667,12 @@ void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 		intel_hdmi->write_infoframe = vlv_write_infoframe;
 		for_each_pipe(i)
 			I915_WRITE(VLV_TVIDEO_DIP_CTL(i), 0);
-	}  else {
-		intel_hdmi->write_infoframe = ironlake_write_infoframe;
+	} else if (HAS_PCH_IBX(dev)) {
+		intel_hdmi->write_infoframe = ibx_write_infoframe;
+		for_each_pipe(i)
+			I915_WRITE(TVIDEO_DIP_CTL(i), 0);
+	} else {
+		intel_hdmi->write_infoframe = cpt_write_infoframe;
 		for_each_pipe(i)
 			I915_WRITE(TVIDEO_DIP_CTL(i), 0);
 	}