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@xxxxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
drivers/gpu/drm/radeon/evergreen_hdmi.c | 30 ++++++++++++++++++++++++++++++
drivers/gpu/drm/radeon/evergreend.h | 3 ++-
2 files changed, 32 insertions(+), 1 deletion(-)
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 @@ void evergreen_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode
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 @@ void evergreen_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode
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 */
diff --git a/drivers/gpu/drm/radeon/evergreend.h b/drivers/gpu/drm/radeon/evergreend.h
index f9c7963..b066d67 100644
--- a/drivers/gpu/drm/radeon/evergreend.h
+++ b/drivers/gpu/drm/radeon/evergreend.h
@@ -517,10 +517,11 @@
# define HDMI_ERROR_ACK (1 << 8)
# define HDMI_ERROR_MASK (1 << 9)
# define HDMI_DEEP_COLOR_ENABLE (1 << 24)
-# define HDMI_DEEP_COLOR_DEPTH (((x) & 3) << 28)
+# define HDMI_DEEP_COLOR_DEPTH(x) (((x) & 3) << 28)
# define HDMI_24BIT_DEEP_COLOR 0
# define HDMI_30BIT_DEEP_COLOR 1
# define HDMI_36BIT_DEEP_COLOR 2
+# define HDMI_DEEP_COLOR_DEPTH_MASK (3 << 28)
#define HDMI_STATUS 0x7034
# define HDMI_ACTIVE_AVMUTE (1 << 0)
# define HDMI_AUDIO_PACKET_ERROR (1 << 16)
--
1.8.3.1
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