drm/radeon/kms: make sure eDP panel is on for modesetting

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c
index cdac739..fd0087f 100644 (file)
--- 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 */