From: Alex Deucher <alexander.deucher@amd.com>
Date: Mon, 23 Feb 2015 22:14:47 +0000 (-0500)
Subject: drm/radeon: setup quantization_range in AVI infoframe
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a1dcc2778b682361351a369652b66dd2d66cf1d9;p=linux-beck.git

drm/radeon: setup quantization_range in AVI infoframe

If the display supports selectable range, set the range
based on what the user has selected for output csc.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=83226

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/radeon/radeon_audio.c b/drivers/gpu/drm/radeon/radeon_audio.c
index b21ef69a34ac..48d49e651a30 100644
--- a/drivers/gpu/drm/radeon/radeon_audio.c
+++ b/drivers/gpu/drm/radeon/radeon_audio.c
@@ -520,16 +520,40 @@ static int radeon_audio_set_avi_packet(struct drm_encoder *encoder,
 	struct radeon_device *rdev = encoder->dev->dev_private;
 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
+	struct drm_connector *connector;
+	struct radeon_connector *radeon_connector = NULL;
 	u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];
 	struct hdmi_avi_infoframe frame;
 	int err;
 
+	list_for_each_entry(connector,
+		&encoder->dev->mode_config.connector_list, head) {
+		if (connector->encoder == encoder) {
+			radeon_connector = to_radeon_connector(connector);
+			break;
+		}
+	}
+
+	if (!radeon_connector) {
+		DRM_ERROR("Couldn't find encoder's connector\n");
+		return -ENOENT;
+	}
+
 	err = drm_hdmi_avi_infoframe_from_display_mode(&frame, mode);
 	if (err < 0) {
 		DRM_ERROR("failed to setup AVI infoframe: %d\n", err);
 		return err;
 	}
 
+	if (drm_rgb_quant_range_selectable(radeon_connector_edid(connector))) {
+		if (radeon_encoder->output_csc == RADEON_OUTPUT_CSC_TVRGB)
+			frame.quantization_range = HDMI_QUANTIZATION_RANGE_LIMITED;
+		else
+			frame.quantization_range = HDMI_QUANTIZATION_RANGE_FULL;
+	} else {
+		frame.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
+	}
+
 	err = hdmi_avi_infoframe_pack(&frame, buffer, sizeof(buffer));
 	if (err < 0) {
 		DRM_ERROR("failed to pack AVI infoframe: %d\n", err);