X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fgpu%2Fdrm%2Fradeon%2Fradeon_connectors.c;h=5a2cafb4f1bc595220e603ed1942e65bf24b20b7;hb=refs%2Fchanges%2F53%2F2653%2F1;hp=94b21ae70ef725781c8dc7d0ec8a30fbd48f0e0e;hpb=342fa5dfa053559f47caad657132522496dcf1b3;p=kvmfornfv.git

diff --git a/kernel/drivers/gpu/drm/radeon/radeon_connectors.c b/kernel/drivers/gpu/drm/radeon/radeon_connectors.c
index 94b21ae70..5a2cafb4f 100644
--- a/kernel/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/kernel/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -95,6 +95,11 @@ void radeon_connector_hotplug(struct drm_connector *connector)
 			if (!radeon_hpd_sense(rdev, radeon_connector->hpd.hpd)) {
 				drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
 			} else if (radeon_dp_needs_link_train(radeon_connector)) {
+				/* Don't try to start link training before we
+				 * have the dpcd */
+				if (!radeon_dp_getdpcd(radeon_connector))
+					return;
+
 				/* set it to OFF so that drm_helper_connector_dpms()
 				 * won't return immediately since the current state
 				 * is ON at this point.