[PATCH 3/8] drm/ast: Refactor ast_post_gpu() by Gen

[Thomas Zimmermann <tzimmermann@xxxxxxx>]

Reorganize ast_post_gpu() so that it first branches by Gen and then
by config mode and TX chip. This will later make it possible to split
up the function by Gen.

The helper ast_init_3rdtx() only handles Gen4 and Gen5, so leave it
out from the other Gens.

Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
---
 drivers/gpu/drm/ast/ast_post.c | 36 ++++++++++++++++++++++++----------
 1 file changed, 26 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/ast/ast_post.c b/drivers/gpu/drm/ast/ast_post.c
index 364030f97571d..49f661760f9e5 100644
--- a/drivers/gpu/drm/ast/ast_post.c
+++ b/drivers/gpu/drm/ast/ast_post.c
@@ -344,21 +344,37 @@ void ast_post_gpu(struct ast_device *ast)
 {
 	ast_set_def_ext_reg(ast);
 
-	if (IS_AST_GEN7(ast)) {
+	if (AST_GEN(ast) >= 7) {
 		if (ast->tx_chip == AST_TX_ASTDP)
 			ast_dp_launch(ast);
-	} else if (ast->config_mode == ast_use_p2a) {
-		if (IS_AST_GEN6(ast))
+	} else if (AST_GEN(ast) >= 6) {
+		if (ast->config_mode == ast_use_p2a) {
 			ast_post_chip_2500(ast);
-		else if (IS_AST_GEN5(ast) || IS_AST_GEN4(ast))
+		} else {
+			if (ast->tx_chip == AST_TX_SIL164) {
+				/* Enable DVO */
+				ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xa3, 0xcf, 0x80);
+			}
+		}
+	} else if (AST_GEN(ast) >= 4) {
+		if (ast->config_mode == ast_use_p2a) {
 			ast_post_chip_2300(ast);
-		else
+			ast_init_3rdtx(ast);
+		} else {
+			if (ast->tx_chip == AST_TX_SIL164) {
+				/* Enable DVO */
+				ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xa3, 0xcf, 0x80);
+			}
+		}
+	} else  {
+		if (ast->config_mode == ast_use_p2a) {
 			ast_init_dram_reg(ast);
-
-		ast_init_3rdtx(ast);
-	} else {
-		if (ast->tx_chip == AST_TX_SIL164)
-			ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xa3, 0xcf, 0x80);	/* Enable DVO */
+		} else {
+			if (ast->tx_chip == AST_TX_SIL164) {
+				/* Enable DVO */
+				ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xa3, 0xcf, 0x80);
+			}
+		}
 	}
 }
 
-- 
2.47.1