1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/drm/ast/ast_post.c b/drivers/gpu/drm/ast/ast_post.c
index f7d421359d56..c1d1ac51d1c2 100644
--- a/drivers/gpu/drm/ast/ast_post.c
+++ b/drivers/gpu/drm/ast/ast_post.c
@@ -46,7 +46,7 @@ void ast_enable_mmio(struct drm_device *dev)
 {
         struct ast_private *ast = dev->dev_private;
 
-        ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa1, 0xff, 0x04);
+        ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x06);
 }