From b7c1d1b3c9519cbbe1615737aed4c4c0efed2167 Mon Sep 17 00:00:00 2001
From: Jimmy Zhang <jimmzhang@nvidia.com>
Date: Thu, 9 Jan 2014 14:29:40 -0800
Subject: [PATCH] tegra124: norrin: Initialize frame buffer

Fix the smeared screen observed when FB has not been initialized.

BUG=None
TEST=graphics comes up clean.

Signed-off-by: Jimmy Zhang <jimmzhang@nvidia.com>

Change-Id: I1ce2365d07d0463968fe50fc45a278badc9e9c0d
Reviewed-on: https://chromium-review.googlesource.com/182090
Tested-by: Jimmy Zhang <jimmzhang@nvidia.com>
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Jimmy Zhang <jimmzhang@nvidia.com>
---
 src/soc/nvidia/tegra124/display.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/soc/nvidia/tegra124/display.c b/src/soc/nvidia/tegra124/display.c
index 96d45e16c7..ba357fd245 100644
--- a/src/soc/nvidia/tegra124/display.c
+++ b/src/soc/nvidia/tegra124/display.c
@@ -308,6 +308,10 @@ void display_startup(device_t dev)
 	/* bringup dp */
 	dp_bringup(framebuffer_base_mb*MiB);
 
+	/* init frame buffer */
+	memset((void *)(framebuffer_base_mb*MiB), 0x00,
+			framebuffer_size_mb*MiB);
+
 	/* tell depthcharge ...
 	 */
 	struct edid edid;