diff options
Diffstat (limited to 'drivers/gpu/drm/ast/ast_main.c')
| -rw-r--r-- | drivers/gpu/drm/ast/ast_main.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c index 50535fd5a88..cd0a791e76c 100644 --- a/drivers/gpu/drm/ast/ast_main.c +++ b/drivers/gpu/drm/ast/ast_main.c @@ -66,6 +66,7 @@ uint8_t ast_get_index_reg_mask(struct ast_private *ast, static int ast_detect_chip(struct drm_device *dev) { struct ast_private *ast = dev->dev_private; + uint32_t data, jreg; if (dev->pdev->device == PCI_CHIP_AST1180) { ast->chip = AST1100; @@ -104,6 +105,33 @@ static int ast_detect_chip(struct drm_device *dev) DRM_INFO("AST 2000 detected\n"); } } + + switch (ast->chip) { + case AST1180: + ast->support_wide_screen = true; + break; + case AST2000: + ast->support_wide_screen = false; + break; + default: + jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff); + if (!(jreg & 0x80)) + ast->support_wide_screen = true; + else if (jreg & 0x01) + ast->support_wide_screen = true; + else { + ast->support_wide_screen = false; + if (ast->chip == AST2300) { + ast_write32(ast, 0xf004, 0x1e6e0000); + ast_write32(ast, 0xf000, 0x1); + data = ast_read32(ast, 0x1207c); + if ((data & 0x300) == 0) /* ast1300 */ + ast->support_wide_screen = true; + } + } + break; + } + return 0; } |