[Intel-gfx] [PATCH 02/24] drm/i915: support infoframes on Haswell

[Eugeni Dodonov]

Haswell has different DIP registers which we need to use for infoframes,
so add proper infrastructure to address that.

Signed-off-by: Eugeni Dodonov <eugeni.dodonov at intel.com>
---
 drivers/gpu/drm/i915/intel_hdmi.c |   34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 7de2d3b..f6a9b83 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -208,6 +208,36 @@ static void vlv_write_infoframe(struct drm_encoder *encoder,
 	I915_WRITE(reg, VIDEO_DIP_ENABLE | val | flags);
 }
 
+static void hsw_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 = HSW_TVIDEO_DIP_CTL(intel_crtc->pipe);
+	unsigned i, len = DIP_HEADER_SIZE + frame->len;
+	u32 flags, 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 */
+
+	I915_WRITE(reg, VIDEO_DIP_ENABLE | val | flags);
+
+	for (i = 0; i < len; i += 4) {
+		I915_WRITE(HSW_TVIDEO_DIP_AVI_DATA(intel_crtc->pipe), *data);
+		data++;
+	}
+
+	flags |= intel_infoframe_flags(frame);
+
+	I915_WRITE(reg, VIDEO_DIP_ENABLE | val | flags);
+}
+
 static void intel_set_infoframe(struct drm_encoder *encoder,
 				struct dip_infoframe *frame)
 {
@@ -587,6 +617,10 @@ 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 if (IS_HASWELL(dev)) {
+		intel_hdmi->write_infoframe = hsw_write_infoframe;
+		for_each_pipe(i)
+			I915_WRITE(HSW_TVIDEO_DIP_CTL(i), 0);
 	}  else {
 		intel_hdmi->write_infoframe = ironlake_write_infoframe;
 		for_each_pipe(i)
-- 
1.7.10