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Commit 66c2b84b authored by Alex Deucher's avatar Alex Deucher
Browse files

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: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
parent 96abd10e

drivers/gpu/drm/radeon/atombios_dp.c

+1 −3
Original line number Diff line number Diff line
@@ -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;