Signed-off-by: Alex Deucher <alexdeuc...@gmail.com>
---
 drivers/gpu/drm/radeon/radeon_encoders.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c 
b/drivers/gpu/drm/radeon/radeon_encoders.c
index cdac739..fd0087f 100644
--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -1936,11 +1936,17 @@ static void radeon_atom_encoder_prepare(struct 
drm_encoder *encoder)
        radeon_atom_output_lock(encoder, true);
        radeon_atom_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
 
-       /* select the clock/data port if it uses a router */
        if (connector) {
                struct radeon_connector *radeon_connector = 
to_radeon_connector(connector);
+
+               /* select the clock/data port if it uses a router */
                if (radeon_connector->router.cd_valid)
                        radeon_router_select_cd_port(radeon_connector);
+
+               /* turn eDP panel on for mode set */
+               if (connector->connector_type == DRM_MODE_CONNECTOR_eDP)
+                       atombios_set_edp_panel_power(connector,
+                                                    
ATOM_TRANSMITTER_ACTION_POWER_ON);
        }
 
        /* this is needed for the pll/ss setup to work correctly in some cases 
*/
-- 
1.7.1.1

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