From: Ramalingam C <ramalingam.c@intel.com>
Date: Thu, 18 Jan 2018 11:18:06 +0530
Subject: drm/i915: II stage HDCP auth for repeater only
Git-commit: 87eb3ec818fa57bc49ce419785c56d72d9da1faa
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Second stage of HDCP authentication required only if the HDCP
sink is a repeater.

This patch imposes above condition on second stage HDCP authentication.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1516254488-4971-3-git-send-email-ramalingam.c@intel.com

Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/i915/intel_hdcp.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -493,7 +493,10 @@ static int intel_hdcp_auth(struct intel_
 	 * on those as well.
 	 */
 
-	return intel_hdcp_auth_downstream(intel_dig_port, shim);
+	if (repeater_present)
+		return intel_hdcp_auth_downstream(intel_dig_port, shim);
+
+	return 0;
 }
 
 static