From: Mark Yao <mark.yao@rock-chips.com>
Date: Thu, 1 Dec 2016 06:54:06 +0000 (+0800)
Subject: drm/rockchip: boot_logo: ignore display route when it's not available
X-Git-Tag: firefly_0821_release~1172
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6bfc3254cf849efb382e12e40a2187ec17209634;p=firefly-linux-kernel-4.4.55.git

drm/rockchip: boot_logo: ignore display route when it's not available

Change-Id: I093b4edeb17c8b1159220618a43f7552070c6001
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
---

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index c76da606a7f4..22183397259e 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -505,6 +505,9 @@ static void show_loader_logo(struct drm_device *drm_dev)
 	state->acquire_ctx = mode_config->acquire_ctx;
 
 	for_each_child_of_node(root, route) {
+		if (!of_device_is_available(route))
+			continue;
+
 		set = of_parse_display_resource(drm_dev, route);
 		if (!set)
 			continue;