drm/i915: Fix AVI infoframe quantization range for YCbCr output

We're configuring the AVI infoframe quantization range bits as if
we're always transmitting RGB pixels. Let's fix this so that we
correctly indicate limited range YCC quantization range when
transmitting YCbCr instead.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190718145053.25808-4-ville.syrjala@linux.intel.comReviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>

drivers/gpu/drm/i915/display/intel_hdmi.c

@@ -724,11 +724,16 @@ intel_hdmi_compute_avi_infoframe(struct intel_encoder *encoder,
 
 	drm_hdmi_avi_infoframe_colorspace(frame, conn_state);
 
+	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_RGB) {
 		drm_hdmi_avi_infoframe_quant_range(frame, connector,
 						   adjusted_mode,
 						   crtc_state->limited_color_range ?
 						   HDMI_QUANTIZATION_RANGE_LIMITED :
 						   HDMI_QUANTIZATION_RANGE_FULL);
+	} else {
+		frame->quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
+		frame->ycc_quantization_range = HDMI_YCC_QUANTIZATION_RANGE_LIMITED;
+	}
 
 	drm_hdmi_avi_infoframe_content_type(frame, conn_state);