On Thu, Jul 17, 2025 at 12:38:11PM -0500, Mario Limonciello wrote:
> From: Mario Limonciello <mario.limoncie...@amd.com>
>
> On systems with non VGA GPUs fbcon can't find the primary GPU because
> video_is_primary_device() only checks the VGA arbiter.
>
> Add a screen info check to video_is_primary_device() so that callers
> can get accurate data on such systems.
This relies on screen_info, which I think is an x86 BIOS-ism. Isn't
there a UEFI console path? How does that compare with this? Is that
relevant or is it something completely different?
> bool video_is_primary_device(struct device *dev)
> {
> +#ifdef CONFIG_SCREEN_INFO
> + struct screen_info *si = &screen_info;
> +#endif
> struct pci_dev *pdev;
>
> if (!dev_is_pci(dev))
> @@ -34,7 +38,18 @@ bool video_is_primary_device(struct device *dev)
>
> pdev = to_pci_dev(dev);
>
> - return (pdev == vga_default_device());
> + if (!pci_is_display(pdev))
> + return false;
> +
> + if (pdev == vga_default_device())
> + return true;
> +
> +#ifdef CONFIG_SCREEN_INFO
> + if (pdev == screen_info_pci_dev(si))
> + return true;
> +#endif
> +
> + return false;
> }
> EXPORT_SYMBOL(video_is_primary_device);
>
> --
> 2.43.0
>
