From: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Date: Fri, 24 Apr 2026 09:09:42 +0000 (+0530)
Subject: drm/i915/dp: Skip AS SDP for DP branch devices
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9584c9a5cabef9b1694bc7e20ba7b99b3b41a8bd;p=thirdparty%2Fkernel%2Flinux.git

drm/i915/dp: Skip AS SDP for DP branch devices

Currently, VRR is not implmented for DP branch devices.
So skip sending AS SDP for them.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20260424090942.3060291-4-ankit.k.nautiyal@intel.com
---

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 8f2cd603f52aa..98df93884e9a2 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -3174,6 +3174,12 @@ static bool intel_dp_needs_as_sdp(struct intel_dp *intel_dp,
 	if (!intel_dp->as_sdp_supported)
 		return false;
 
+	/*
+	 * #TODO Implement AS SDP for DP branch device.
+	 */
+	if (drm_dp_is_branch(intel_dp->dpcd))
+		return false;
+
 	return crtc_state->vrr.enable;
 }