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efi/libstub: x86: Store EDID in boot_params 

Retrieve the GOP device's EDID information in the kernel's boot
parameters. Makes the data avaialble to kernel graphics code and
drives, such as efidrm.

With efidrm, the EDID is now also available to user-space compositors
via standard DRM interfaces.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Thomas Zimmermann 2025-10-15 17:56:34 +02:00 committed by Ard Biesheuvel
parent 17029cdd8f
commit e41ef37ddf
1 changed files with 2 additions and 1 deletions
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3
drivers/firmware/efi/libstub/x86-stub.c
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@ -487,8 +487,9 @@ static void setup_quirks(struct boot_params *boot_params)
static void setup_graphics(struct boot_params *boot_params)
{
struct screen_info *si = memset(&boot_params->screen_info, 0, sizeof(*si));
struct edid_info *edid = memset(&boot_params->edid_info, 0, sizeof(*edid));
efi_setup_graphics(si, NULL);
efi_setup_graphics(si, edid);
}
static void __noreturn efi_exit(efi_handle_t handle, efi_status_t status)