1 files changed, 13 insertions, 5 deletions

diff --git a/drivers/gpu/drm/ast/ast_post.c b/drivers/gpu/drm/ast/ast_post.c
index 810c51d92b99..5331ee1df086 100644
--- a/drivers/gpu/drm/ast/ast_post.c
+++ b/drivers/gpu/drm/ast/ast_post.c
@@ -379,12 +379,20 @@ void ast_post_gpu(struct drm_device *dev)
         ast_open_key(ast);
         ast_set_def_ext_reg(dev);
 
-        if (ast->chip == AST2300 || ast->chip == AST2400)
-                ast_init_dram_2300(dev);
-        else
-                ast_init_dram_reg(dev);
+        if (ast->DisableP2A == false)
+        {
+                if (ast->chip == AST2300 || ast->chip == AST2400)
+                        ast_init_dram_2300(dev);
+                else
+                        ast_init_dram_reg(dev);
 
-        ast_init_3rdtx(dev);
+                ast_init_3rdtx(dev);
+        }
+        else
+        {
+                if (ast->tx_chip_type != AST_TX_NONE)
+                        ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xcf, 0x80);        /* Enable DVO */
+        }
 }
 
 /* AST 2300 DRAM settings */