This patch adds a small helper function, which clears the cached
information about a hot-pluggable display, from connector. On event
This will run on event of a hot-unplug, keeping the connector's display
info up-to-date, avoiding any errors due to invalid cached data.
Cc: Jose Abreu <joabreu@xxxxxxxxxxxx>
Suggested-by: Jose Abreu <joabreu@xxxxxxxxxxxx>
Signed-off-by: Shashank Sharma <shashank.sharma@xxxxxxxxx>
---
drivers/gpu/drm/drm_probe_helper.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index 7cff91e..9e97b45 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -164,6 +164,18 @@ void drm_kms_helper_poll_enable_locked(struct drm_device *dev)
}
/**
+ * drm_helper_clear_display_info - clean cached display information for
+ * hot pluggable displays, on event of hot-unplug
+ * @connector: connector under event
+ */
+void drm_helper_clear_display_info(struct drm_connector *connector)
+{
+ struct drm_display_info *info = &connector->display_info;
+
+ memset(info, 0, sizeof(*info));
+}
+
+/**
* drm_helper_probe_single_connector_modes - get complete set of display modes
* @connector: connector to probe
* @maxX: max width for modes
@@ -288,6 +300,14 @@ int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
connector->base.id, connector->name);
drm_mode_connector_update_edid_property(connector, NULL);
+
+ /*
+ * Connector status change to disconnected, time to clean
+ * cached display information
+ */
+ if (connector->status == connector_status_disconnected)
+ drm_helper_clear_display_info(connector);
+
verbose_prune = false;
goto prune;
}
--
1.9.1
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