drm/i915/display/vrr: Reset VRR capable property on a long hpd

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.

v2: Reset vrr capable if status == connector_disconnected
v3: Use i915 and use bool vrr_capable (Jani Nikula)
v4: Move vrr_capable to after update modes call (Jani N)
Remove the redundant comment (Jan N)

Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220215202601.22943-1-manasi.d.navare@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 5381b993a34632de2ff059e7a096b8742580f05d..a80d96ced198352c344e697dced12780dd9ab8a9 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -4455,6 +4455,12 @@ intel_dp_detect(struct drm_connector *connector,
                memset(&intel_dp->compliance, 0, sizeof(intel_dp->compliance));
                memset(intel_dp->dsc_dpcd, 0, sizeof(intel_dp->dsc_dpcd));
 
+               /* Reset VRR Capable property */
+               drm_dbg_kms(&dev_priv->drm, "[CONNECTOR:%d:%s] VRR capable: FALSE\n",
+                           connector->base.id, connector->name);
+               drm_connector_set_vrr_capable_property(connector,
+                                                      false);
+
                if (intel_dp->is_mst) {
                        drm_dbg_kms(&dev_priv->drm,
                                    "MST device may have disappeared %d vs %d\n",
@@ -4569,15 +4575,18 @@ 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 *i915 = to_i915(connector->dev);
        int num_modes = 0;
 
        edid = intel_connector->detect_edid;
        if (edid) {
-               num_modes = intel_connector_update_modes(connector, edid);
+               bool vrr_capable;
 
-               if (intel_vrr_is_capable(connector))
-                       drm_connector_set_vrr_capable_property(connector,
-                                                              true);
+               num_modes = intel_connector_update_modes(connector, edid);
+               vrr_capable = intel_vrr_is_capable(connector);
+               drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] VRR capable: %s\n",
+                           connector->base.id, connector->name, yesno(vrr_capable));
+               drm_connector_set_vrr_capable_property(connector, vrr_capable);
        }
 
        /* Also add fixed mode, which may or may not be present in EDID */