release/4.8.23/drm-ast-Call-open_key-before-enable_mmio-in-POST-cod.patch

From f6aa5bf4af14eedf9a911804f3d724e4659e2846 Mon Sep 17 00:00:00 2001
From: "Y.C. Chen" <yc_chen@aspeedtech.com>
Date: Wed, 22 Feb 2017 15:14:19 +1100
Subject: [PATCH] drm/ast: Call open_key before enable_mmio in POST code

commit 9bb92f51558f2ef5f56c257bdcea0588f31d857e upstream.

open_key enables access the registers used by enable_mmio

Signed-off-by: Y.C. Chen <yc_chen@aspeedtech.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Joel Stanley <joel@jms.id.au>
Tested-by: Y.C. Chen <yc_chen@aspeedtech.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/drivers/gpu/drm/ast/ast_post.c b/drivers/gpu/drm/ast/ast_post.c
index 4e8aaab5dd52..50836e549867 100644
--- a/drivers/gpu/drm/ast/ast_post.c
+++ b/drivers/gpu/drm/ast/ast_post.c
@@ -371,8 +371,8 @@ void ast_post_gpu(struct drm_device *dev)
 	pci_write_config_dword(ast->dev->pdev, 0x04, reg);
 
 	ast_enable_vga(dev);
-	ast_enable_mmio(dev);
 	ast_open_key(ast);
+	ast_enable_mmio(dev);
 	ast_set_def_ext_reg(dev);
 
 	if (ast->chip == AST2300 || ast->chip == AST2400)
-- 
2.12.0