[PATCH 12/14] drm/ast: Detect AST 2510 model

[Thomas Zimmermann]

Detect the 6th-generation AST 2510. Allows to simplify the code
for widescreen support.

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
---
 drivers/gpu/drm/ast/ast_drv.h  |  2 +-
 drivers/gpu/drm/ast/ast_main.c | 14 ++++++++++----
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index ef69a1535695b..c66fe0ba208e7 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -78,7 +78,7 @@ enum ast_chip {
 	AST1250 = __AST_CHIP(5, 2), // unused
 	/* 6th gen */
 	AST2500 = __AST_CHIP(6, 0),
-	AST2510 = __AST_CHIP(6, 1), // unused
+	AST2510 = __AST_CHIP(6, 1),
 	AST2520 = __AST_CHIP(6, 2), // unused
 	/* 7th gen */
 	AST2600 = __AST_CHIP(7, 0),
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index 72543e97f3586..7f8fb9a613604 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -164,8 +164,15 @@ static int ast_detect_chip(struct drm_device *dev, bool need_post, u32 scu_rev)
 		ast->chip = AST2600;
 		drm_info(dev, "AST 2600 detected\n");
 	} else if (pdev->revision >= 0x40) {
-		ast->chip = AST2500;
-		drm_info(dev, "AST 2500 detected\n");
+		switch (scu_rev & 0x300) {
+		case 0x0100:
+			ast->chip = AST2510;
+			drm_info(dev, "AST 2510 detected\n");
+			break;
+		default:
+			ast->chip = AST2500;
+			drm_info(dev, "AST 2500 detected\n");
+		}
 	} else if (pdev->revision >= 0x30) {
 		switch (scu_rev & 0x300) {
 		case 0x0100:
@@ -228,8 +235,7 @@ static int ast_detect_chip(struct drm_device *dev, bool need_post, u32 scu_rev)
 				ast->support_wide_screen = true;
 			if (ast->chip == AST1400)
 				ast->support_wide_screen = true;
-			if (ast->chip == AST2500 &&
-			    scu_rev == 0x100)           /* ast2510 */
+			if (ast->chip == AST2510)
 				ast->support_wide_screen = true;
 			if (IS_AST_GEN7(ast))
 				ast->support_wide_screen = true;
-- 
2.41.0