Currently we do not support VRR with HDMI so skip vrr compute
config step for all DP branch devices.
v2: Restrict VRR on all DP branch devices instead for checking only for
HDMI. (Ville)
Signed-off-by: Ankit Nautiyal <[email protected]>
---
drivers/gpu/drm/i915/display/intel_vrr.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c
b/drivers/gpu/drm/i915/display/intel_vrr.c
index 9d814cc2d608..c57328b76f26 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -54,6 +54,16 @@ bool intel_vrr_is_capable(struct intel_connector *connector)
if (connector->mst.dp)
return false;
intel_dp = intel_attached_dp(connector);
+ /*
+ * Among non-MST DP branch devices, only an HDMI 2.1 sink
connected
+ * via a PCON could support VRR. However, supporting VRR
through a
+ * PCON requires non-trivial changes that are not implemented
yet.
+ * Until that support exists, avoid VRR on all DP branch
devices.
+ *
+ * TODO: Add support for VRR for DP->HDMI 2.1 PCON.
+ */
+ if (drm_dp_is_branch(intel_dp->dpcd))
+ return false;
if
(!drm_dp_sink_can_do_video_without_timing_msa(intel_dp->dpcd))
return false;
--
2.45.2
