Detect the 4th-generation AST 1300. Allows to simplify the code
for widescreen support.
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
---
drivers/gpu/drm/ast/ast_drv.h | 2 +-
drivers/gpu/drm/ast/ast_main.c | 15 +++++++++++----
2 files changed, 12 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index c209d7e4e4194..e3f82c7a823e4 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -70,7 +70,7 @@ enum ast_chip {
AST2150 = __AST_CHIP(3, 1),
/* 4th gen */
AST2300 = __AST_CHIP(4, 0),
- AST1300 = __AST_CHIP(4, 1), // unused
+ AST1300 = __AST_CHIP(4, 1),
AST1050 = __AST_CHIP(4, 2), // unused
/* 5th gen */
AST2400 = __AST_CHIP(5, 0),
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index 3cd94a74150bf..bf8606301ab26 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -170,8 +170,16 @@ static int ast_detect_chip(struct drm_device *dev, bool need_post, u32 scu_rev)
ast->chip = AST2400;
drm_info(dev, "AST 2400 detected\n");
} else if (pdev->revision >= 0x20) {
- ast->chip = AST2300;
- drm_info(dev, "AST 2300 detected\n");
+ switch (scu_rev & 0x300) {
+ case 0x0000:
+ ast->chip = AST1300;
+ drm_info(dev, "AST 1300 detected\n");
+ break;
+ default:
+ ast->chip = AST2300;
+ drm_info(dev, "AST 2300 detected\n");
+ break;
+ }
} else if (pdev->revision >= 0x10) {
switch (scu_rev & 0x0300) {
case 0x0200:
@@ -209,8 +217,7 @@ static int ast_detect_chip(struct drm_device *dev, bool need_post, u32 scu_rev)
ast->support_wide_screen = true;
else {
ast->support_wide_screen = false;
- if (ast->chip == AST2300 &&
- (scu_rev & 0x300) == 0x0) /* ast1300 */
+ if (ast->chip == AST1300)
ast->support_wide_screen = true;
if (ast->chip == AST2400 &&
(scu_rev & 0x300) == 0x100) /* ast1400 */
--
2.41.0
