From 8f372e250ae5f4a5faf87ca1a629d0ae59db65b6 Mon Sep 17 00:00:00 2001
From: "Y.C. Chen" <yc_chen@aspeedtech.com>
Date: Wed, 10 Sep 2014 12:07:53 +0800
Subject: [PATCH] drm/ast: open key before detect chips

Some config settings like 3rd TX chips will not get correctly
if the extended reg is protected

Signed-off-by: Y.C. Chen <yc_chen@aspeedtech.com>
Reviewed-by: Egbert Eich <eich@suse.de>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
---
 drivers/gpu/drm/ast/ast_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index a2cc6be97983..b027e332caa5 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -67,6 +67,7 @@ static int ast_detect_chip(struct drm_device *dev)
 {
 	struct ast_private *ast = dev->dev_private;
 	uint32_t data, jreg;
+	ast_open_key(ast);
 
 	if (dev->pdev->device == PCI_CHIP_AST1180) {
 		ast->chip = AST1100;