linux-kernel - [PATCH 5/5] efi/libstub: x86: Store EDID in boot

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20251015160816.525825-6-tzimmermann@suse.de>
Date: Wed, 15 Oct 2025 17:56:34 +0200
From: Thomas Zimmermann <tzimmermann@...e.de>
To: ardb@...nel.org,
	jonathan@...ek.ca,
	javierm@...hat.com
Cc: linux-efi@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Thomas Zimmermann <tzimmermann@...e.de>
Subject: [PATCH 5/5] 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@...e.de>
---
 drivers/firmware/efi/libstub/x86-stub.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/efi/libstub/x86-stub.c b/drivers/firmware/efi/libstub/x86-stub.c
index b68dbfd1cb87..8c6ff0b49912 100644
--- a/drivers/firmware/efi/libstub/x86-stub.c
+++ b/drivers/firmware/efi/libstub/x86-stub.c
@@ -388,8 +388,9 @@ 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)
-- 
2.51.0