From: Alex Deucher Date: Wed, 11 Feb 2015 23:34:36 +0000 (-0500) Subject: drm/radeon/dp: Set EDP_CONFIGURATION_SET for bridge chips if necessary X-Git-Tag: v3.19.2~130 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3aeb57ffdb5325636869d102f70ef6096b9d49d9;p=thirdparty%2Fkernel%2Fstable.git drm/radeon/dp: Set EDP_CONFIGURATION_SET for bridge chips if necessary commit 66c2b84ba6256bc5399eed45582af9ebb3ba2c15 upstream. 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 Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c index db42a670f9957..5bf825dfaa098 100644 --- 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;