From: Lars-Peter Clausen <lars@metafoo.de>
Date: Tue, 5 Sep 2017 14:10:15 +0200
Subject: drm/bridge: adv7511: Properly update EDID when no EDID was found
Git-commit: 6f39ed4f0939e6bef722f0096894c1a986da9c9a
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Currently adv7511_get_modes() bails out early when no EDID could be
retrieved. This leaves the previous EDID in place, which is typically not
the intended behavior and might confuse applications. Instead the EDID
should be cleared when no EDID could be retrieved.

All functions that are called after the EDID check handle the case where
the EDID is NULL just fine and exhibit the expected behavior, so just drop
the check.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Tested-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20170905121018.11477-1-lars@metafoo.de

Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/bridge/adv7511/adv7511_drv.c |    2 --
 1 file changed, 2 deletions(-)

--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -591,8 +591,6 @@ static int adv7511_get_modes(struct adv7
 
 	kfree(adv7511->edid);
 	adv7511->edid = edid;
-	if (!edid)
-		return 0;
 
 	drm_mode_connector_update_edid_property(connector, edid);
 	count = drm_add_edid_modes(connector, edid);