drm/radeon: Setup HDMI_CONTROL for hdmi deep color gcp's (v2)
Program HDMI_CONTROL to send general control packets
for hdmi deep color mode signalling at every video
frame if bpc > 8.
This is only supported on evergreen / DCE-4 and later.
v2: rebase
Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/evergreen_hdmi.c b/drivers/gpu/drm/radeon/evergreen_hdmi.c
index 8579721..b760ef5 100644
--- a/drivers/gpu/drm/radeon/evergreen_hdmi.c
+++ b/drivers/gpu/drm/radeon/evergreen_hdmi.c
@@ -298,6 +298,7 @@
struct hdmi_avi_infoframe frame;
uint32_t offset;
ssize_t err;
+ uint32_t val;
int bpc = 8;
if (!dig || !dig->afmt)
@@ -330,6 +331,35 @@
WREG32(AFMT_AUDIO_CRC_CONTROL + offset, 0x1000);
+ val = RREG32(HDMI_CONTROL + offset);
+ val &= ~HDMI_DEEP_COLOR_ENABLE;
+ val &= ~HDMI_DEEP_COLOR_DEPTH_MASK;
+
+ switch (bpc) {
+ case 0:
+ case 6:
+ case 8:
+ case 16:
+ default:
+ DRM_DEBUG("%s: Disabling hdmi deep color for %d bpc.\n",
+ drm_get_connector_name(connector), bpc);
+ break;
+ case 10:
+ val |= HDMI_DEEP_COLOR_ENABLE;
+ val |= HDMI_DEEP_COLOR_DEPTH(HDMI_30BIT_DEEP_COLOR);
+ DRM_DEBUG("%s: Enabling hdmi deep color 30 for 10 bpc.\n",
+ drm_get_connector_name(connector));
+ break;
+ case 12:
+ val |= HDMI_DEEP_COLOR_ENABLE;
+ val |= HDMI_DEEP_COLOR_DEPTH(HDMI_36BIT_DEEP_COLOR);
+ DRM_DEBUG("%s: Enabling hdmi deep color 36 for 12 bpc.\n",
+ drm_get_connector_name(connector));
+ break;
+ }
+
+ WREG32(HDMI_CONTROL + offset, val);
+
WREG32(HDMI_VBI_PACKET_CONTROL + offset,
HDMI_NULL_SEND | /* send null packets when required */
HDMI_GC_SEND | /* send general control packets */
