[Intel-gfx] [PATCH] drm/i915/display/vrr: Reset VRR capable property on a long hpd

[Manasi Navare]

With some VRR panels, user can turn VRR ON/OFF on the fly from the panel settings.
When VRR is turned OFF ,sends a long HPD to the driver clearing the Ignore MSA bit
in the DPCD. Currently the driver parses that onevery HPD but fails to reset
the corresponding VRR Capable Connector property.
Hence the userspace still sees this as VRR Capable panel which is incorrect.

Fix this by explicitly resetting the connector property.

Signed-off-by: Manasi Navare <manasi.d.navare at intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index df2a7d86aef0..4f1418f02b76 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -4539,15 +4539,24 @@ static int intel_dp_get_modes(struct drm_connector *connector)
 {
 	struct intel_connector *intel_connector = to_intel_connector(connector);
 	struct edid *edid;
+	struct drm_i915_private *dev_priv = to_i915(connector->dev);
 	int num_modes = 0;
 
 	edid = intel_connector->detect_edid;
 	if (edid) {
 		num_modes = intel_connector_update_modes(connector, edid);
 
-		if (intel_vrr_is_capable(connector))
+		if (intel_vrr_is_capable(connector)) {
+			drm_dbg_kms(&dev_priv->drm, "VRR capable  = TRUE for [CONNECTOR:%d:%s]\n",
+				    connector->base.id, connector->name);
 			drm_connector_set_vrr_capable_property(connector,
 							       true);
+		} else {
+			drm_dbg_kms(&dev_priv->drm, "VRR capable = false for [CONNECTOR:%d:%s]\n",
+				    connector->base.id, connector->name);
+			drm_connector_set_vrr_capable_property(connector,
+							       false);
+		}
 	}
 
 	/* Also add fixed mode, which may or may not be present in EDID */
-- 
2.19.1