Patch "drm/bridge/lontium-lt9611uxc: fix provided connector suport" has been added to the 5.14-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    drm/bridge/lontium-lt9611uxc: fix provided connector suport

to the 5.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-bridge-lontium-lt9611uxc-fix-provided-connector-.patch
and it can be found in the queue-5.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit b75df2d3aba9a6b96ce89f57836f871ac5586ffc
Author: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Date:   Fri Jul 9 02:03:29 2021 +0300

    drm/bridge/lontium-lt9611uxc: fix provided connector suport
    
    [ Upstream commit 15184965783aab3ca7ee4f939e2598943b3f40f9 ]
    
    - set DRM_CONNECTOR_POLL_HPD as the connector will generate hotplug
      events on its own
    
    - do not call drm_kms_helper_hotplug_event() unless mode_config.funcs
      pointer is not NULL to remove possible kernel oops.
    
    Fixes: bc6fa8676ebb ("drm/bridge/lontium-lt9611uxc: move HPD notification out of IRQ handler")
    Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
    Signed-off-by: Robert Foss <robert.foss@xxxxxxxxxx>
    Link: https://patchwork.freedesktop.org/patch/msgid/20210708230329.395976-1-dmitry.baryshkov@xxxxxxxxxx
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
index 3cac16db970f0..010657ea7af78 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
@@ -167,9 +167,10 @@ static void lt9611uxc_hpd_work(struct work_struct *work)
 	struct lt9611uxc *lt9611uxc = container_of(work, struct lt9611uxc, work);
 	bool connected;
 
-	if (lt9611uxc->connector.dev)
-		drm_kms_helper_hotplug_event(lt9611uxc->connector.dev);
-	else {
+	if (lt9611uxc->connector.dev) {
+		if (lt9611uxc->connector.dev->mode_config.funcs)
+			drm_kms_helper_hotplug_event(lt9611uxc->connector.dev);
+	} else {
 
 		mutex_lock(&lt9611uxc->ocm_lock);
 		connected = lt9611uxc->hdmi_connected;
@@ -339,6 +340,8 @@ static int lt9611uxc_connector_init(struct drm_bridge *bridge, struct lt9611uxc
 		return -ENODEV;
 	}
 
+	lt9611uxc->connector.polled = DRM_CONNECTOR_POLL_HPD;
+
 	drm_connector_helper_add(&lt9611uxc->connector,
 				 &lt9611uxc_bridge_connector_helper_funcs);
 	ret = drm_connector_init(bridge->dev, &lt9611uxc->connector,