From: Alex Deucher <alexander.deuc...@amd.com>
Improve handling of bpc (bits per color) in radeon.
In most cases we want 8 except for HDMI, DP, LVDS, and eDP.
v2: handle DP better.
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Tested-by: Lennert Buytenhek <buytenh at wantstofly.org>
---
drivers/gpu/drm/radeon/atombios_crtc.c | 7 +--
drivers/gpu/drm/radeon/atombios_dp.c | 7 +--
drivers/gpu/drm/radeon/atombios_encoders.c | 4 +-
drivers/gpu/drm/radeon/radeon_connectors.c | 56 ++++++++++++++++++++++++++++
drivers/gpu/drm/radeon/radeon_mode.h | 1 +
5 files changed, 63 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c
b/drivers/gpu/drm/radeon/atombios_crtc.c
index b5ff1f7..2fab38f 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -588,8 +588,7 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc,
if (encoder->crtc == crtc) {
radeon_encoder = to_radeon_encoder(encoder);
connector = radeon_get_connector_for_encoder(encoder);
- /* if (connector && connector->display_info.bpc)
- bpc = connector->display_info.bpc; */
+ bpc = radeon_get_monitor_bpc(connector);
encoder_mode = atombios_get_encoder_mode(encoder);
is_duallink = radeon_dig_monitor_is_duallink(encoder,
mode->clock);
if ((radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT
| ATOM_DEVICE_DFP_SUPPORT)) ||
@@ -965,9 +964,7 @@ static void atombios_crtc_set_pll(struct drm_crtc *crtc,
struct drm_display_mode
struct radeon_connector_atom_dig *dig_connector =
radeon_connector->con_priv;
int dp_clock;
-
- /* if (connector->display_info.bpc)
- bpc = connector->display_info.bpc; */
+ bpc = radeon_get_monitor_bpc(connector);
switch (encoder_mode) {
case ATOM_ENCODER_MODE_DP_MST:
diff --git a/drivers/gpu/drm/radeon/atombios_dp.c
b/drivers/gpu/drm/radeon/atombios_dp.c
index c57d856..cadbb10 100644
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -405,13 +405,10 @@ static void dp_get_adjust_train(u8
link_status[DP_LINK_STATUS_SIZE],
/* get bpc from the EDID */
static int convert_bpc_to_bpp(int bpc)
{
-#if 0
if (bpc == 0)
return 24;
else
return bpc * 3;
-#endif
- return 24;
}
/* get the max pix clock supported by the link rate and lane num */
@@ -463,7 +460,7 @@ static int radeon_dp_get_dp_lane_number(struct
drm_connector *connector,
u8 dpcd[DP_DPCD_SIZE],
int pix_clock)
{
- int bpp = convert_bpc_to_bpp(connector->display_info.bpc);
+ int bpp = convert_bpc_to_bpp(radeon_get_monitor_bpc(connector));
int max_link_rate = dp_get_max_link_rate(dpcd);
int max_lane_num = dp_get_max_lane_number(dpcd);
int lane_num;
@@ -482,7 +479,7 @@ static int radeon_dp_get_dp_link_clock(struct drm_connector
*connector,
u8 dpcd[DP_DPCD_SIZE],
int pix_clock)
{
- int bpp = convert_bpc_to_bpp(connector->display_info.bpc);
+ int bpp = convert_bpc_to_bpp(radeon_get_monitor_bpc(connector));
int lane_num, max_pix_clock;
if (radeon_connector_encoder_get_dp_bridge_encoder_id(connector) ==
diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c
b/drivers/gpu/drm/radeon/atombios_encoders.c
index e607c4d..06b209b 100644
--- a/drivers/gpu/drm/radeon/atombios_encoders.c
+++ b/drivers/gpu/drm/radeon/atombios_encoders.c
@@ -541,7 +541,7 @@ atombios_dig_encoder_setup(struct drm_encoder *encoder, int
action, int panel_mo
dp_clock = dig_connector->dp_clock;
dp_lane_count = dig_connector->dp_lane_count;
hpd_id = radeon_connector->hpd.hpd;
- /* bpc = connector->display_info.bpc; */
+ bpc = radeon_get_monitor_bpc(connector);
}
/* no dig encoder assigned */
@@ -1159,7 +1159,7 @@ atombios_external_encoder_setup(struct drm_encoder
*encoder,
dp_lane_count = dig_connector->dp_lane_count;
connector_object_id =
(radeon_connector->connector_object_id &
OBJECT_ID_MASK) >> OBJECT_ID_SHIFT;
- /* bpc = connector->display_info.bpc; */
+ bpc = radeon_get_monitor_bpc(connector);
}
memset(&args, 0, sizeof(args));
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c
b/drivers/gpu/drm/radeon/radeon_connectors.c
index bd05156..71fa389 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -84,6 +84,62 @@ static void radeon_property_change_mode(struct drm_encoder
*encoder)
crtc->x, crtc->y, crtc->fb);
}
}
+
+int radeon_get_monitor_bpc(struct drm_connector *connector)
+{
+ struct drm_device *dev = connector->dev;
+ struct radeon_device *rdev = dev->dev_private;
+ struct radeon_connector *radeon_connector =
to_radeon_connector(connector);
+ struct radeon_connector_atom_dig *dig_connector;
+ int bpc = 8;
+
+ switch (connector->connector_type) {
+ case DRM_MODE_CONNECTOR_DVII:
+ case DRM_MODE_CONNECTOR_HDMIB:
+ if (radeon_connector->use_digital) {
+ if (drm_detect_hdmi_monitor(radeon_connector->edid)) {
+ if (connector->display_info.bpc)
+ bpc = connector->display_info.bpc;
+ }
+ }
+ break;
+ case DRM_MODE_CONNECTOR_DVID:
+ case DRM_MODE_CONNECTOR_HDMIA:
+ if (drm_detect_hdmi_monitor(radeon_connector->edid)) {
+ if (connector->display_info.bpc)
+ bpc = connector->display_info.bpc;
+ }
+ break;
+ case DRM_MODE_CONNECTOR_DisplayPort:
+ dig_connector = radeon_connector->con_priv;
+ if ((dig_connector->dp_sink_type ==
CONNECTOR_OBJECT_ID_DISPLAYPORT) ||
+ (dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_eDP) ||
+ drm_detect_hdmi_monitor(radeon_connector->edid)) {
+ if (connector->display_info.bpc)
+ bpc = connector->display_info.bpc;
+ }
+ break;
+ case DRM_MODE_CONNECTOR_eDP:
+ case DRM_MODE_CONNECTOR_LVDS:
+ if (connector->display_info.bpc)
+ bpc = connector->display_info.bpc;
+ else if (ASIC_IS_DCE41(rdev) || ASIC_IS_DCE5(rdev)) {
+ struct drm_connector_helper_funcs *connector_funcs =
+ connector->helper_private;
+ struct drm_encoder *encoder =
connector_funcs->best_encoder(connector);
+ struct radeon_encoder *radeon_encoder =
to_radeon_encoder(encoder);
+ struct radeon_encoder_atom_dig *dig =
radeon_encoder->enc_priv;
+
+ if (dig->lcd_misc & ATOM_PANEL_MISC_V13_6BIT_PER_COLOR)
+ bpc = 6;
+ else if (dig->lcd_misc &
ATOM_PANEL_MISC_V13_8BIT_PER_COLOR)
+ bpc = 8;
+ }
+ break;
+ }
+ return bpc;
+}
+
static void
radeon_connector_update_scratch_regs(struct drm_connector *connector, enum
drm_connector_status status)
{
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h
b/drivers/gpu/drm/radeon/radeon_mode.h
index f7eb5d8..b2cca6a 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -476,6 +476,7 @@ extern u16 radeon_encoder_get_dp_bridge_encoder_id(struct
drm_encoder *encoder);
extern u16 radeon_connector_encoder_get_dp_bridge_encoder_id(struct
drm_connector *connector);
extern bool radeon_connector_encoder_is_hbr2(struct drm_connector *connector);
extern bool radeon_connector_is_dp12_capable(struct drm_connector *connector);
+extern int radeon_get_monitor_bpc(struct drm_connector *connector);
extern void radeon_connector_hotplug(struct drm_connector *connector);
extern int radeon_dp_mode_valid_helper(struct drm_connector *connector,
--
1.7.7.5
