Commit 00dfb8df authored by Alex Deucher's avatar Alex Deucher Committed by Dave Airlie
Browse files

drm/radeon/kms: properly set panel mode for eDP



This should make eDP more reliable.

Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@kernel.org
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 06c9c233
......@@ -553,6 +553,7 @@ static void radeon_dp_set_panel_mode(struct drm_encoder *encoder,
{
struct drm_device *dev = encoder->dev;
struct radeon_device *rdev = dev->dev_private;
struct radeon_connector *radeon_connector = to_radeon_connector(connector);
int panel_mode = DP_PANEL_MODE_EXTERNAL_DP_MODE;
if (!ASIC_IS_DCE4(rdev))
......@@ -560,10 +561,20 @@ static void radeon_dp_set_panel_mode(struct drm_encoder *encoder,
if (radeon_connector_encoder_is_dp_bridge(connector))
panel_mode = DP_PANEL_MODE_INTERNAL_DP1_MODE;
else if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
u8 tmp = radeon_read_dpcd_reg(radeon_connector, DP_EDP_CONFIGURATION_CAP);
if (tmp & 1)
panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE;
}
atombios_dig_encoder_setup(encoder,
ATOM_ENCODER_CMD_SETUP_PANEL_MODE,
panel_mode);
if ((connector->connector_type == DRM_MODE_CONNECTOR_eDP) &&
(panel_mode == DP_PANEL_MODE_INTERNAL_DP2_MODE)) {
radeon_write_dpcd_reg(radeon_connector, DP_EDP_CONFIGURATION_SET, 1);
}
}
void radeon_dp_set_link_config(struct drm_connector *connector,
......
......@@ -72,6 +72,7 @@
#define DP_MAIN_LINK_CHANNEL_CODING 0x006
#define DP_EDP_CONFIGURATION_CAP 0x00d
#define DP_TRAINING_AUX_RD_INTERVAL 0x00e
#define DP_PSR_SUPPORT 0x070
......@@ -159,6 +160,8 @@
# define DP_CP_IRQ (1 << 2)
# define DP_SINK_SPECIFIC_IRQ (1 << 6)
#define DP_EDP_CONFIGURATION_SET 0x10a
#define DP_LANE0_1_STATUS 0x202
#define DP_LANE2_3_STATUS 0x203
# define DP_LANE_CR_DONE (1 << 0)
......
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