diff options
Diffstat (limited to 'drivers/gpu/drm/ast/ast_main.c')
| -rw-r--r-- | drivers/gpu/drm/ast/ast_main.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c index c6987e044661..01f938c2da28 100644 --- a/drivers/gpu/drm/ast/ast_main.c +++ b/drivers/gpu/drm/ast/ast_main.c @@ -35,6 +35,23 @@ #include "ast_drv.h" +static int ast_init_pci_config(struct pci_dev *pdev) +{ + int err; + u16 pcis04; + + err = pci_read_config_word(pdev, PCI_COMMAND, &pcis04); + if (err) + goto out; + + pcis04 |= PCI_COMMAND_MEMORY | PCI_COMMAND_IO; + + err = pci_write_config_word(pdev, PCI_COMMAND, pcis04); + +out: + return pcibios_err_to_errno(err); +} + static void ast_detect_config_mode(struct drm_device *dev, u32 *scu_rev) { struct device_node *np = dev->dev->of_node; @@ -399,6 +416,10 @@ struct ast_device *ast_device_create(const struct drm_driver *drv, return ERR_PTR(-EIO); } + ret = ast_init_pci_config(pdev); + if (ret) + return ERR_PTR(ret); + if (!ast_is_vga_enabled(dev)) { drm_info(dev, "VGA not enabled on entry, requesting chip POST\n"); need_post = true; |