drm/radeon/dp: Set EDP_CONFIGURATION_SET for bridge chips if necessary

Don't restrict it to just eDP panels.  Some LVDS bridge chips require
this.  Fixes blank panels on resume on certain laptops.  Noticed
by mrnuke on IRC.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=42960

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c
index db42a670f9957c7fd6c3698b2c0be178ac6a02d2..5bf825dfaa098ec6b6ad8f479856ce676f51ba21 100644 (file)
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -623,10 +623,8 @@ static int radeon_dp_link_train_init(struct radeon_dp_link_train_info *dp_info)
                drm_dp_dpcd_writeb(dp_info->aux,
                                   DP_DOWNSPREAD_CTRL, 0);
 
-       if ((dp_info->connector->connector_type == DRM_MODE_CONNECTOR_eDP) &&
-           (dig->panel_mode == DP_PANEL_MODE_INTERNAL_DP2_MODE)) {
+       if (dig->panel_mode == DP_PANEL_MODE_INTERNAL_DP2_MODE)
                drm_dp_dpcd_writeb(dp_info->aux, DP_EDP_CONFIGURATION_SET, 1);
-       }
 
        /* set the lane count on the sink */
        tmp = dp_info->dp_lane_count;