This is a note to let you know that I've just added the patch titled
Revert "drivers/firmware: Move sysfb_init() from device_initcall to subsys_initcall_sync"
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
revert-drivers-firmware-move-sysfb_init-from-device_initcall-to-subsys_initcall_sync.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d1b163aa0749706379055e40a52cf7a851abf9dc Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <tzimmermann@xxxxxxx>
Date: Tue, 23 Jan 2024 13:09:26 +0100
Subject: Revert "drivers/firmware: Move sysfb_init() from device_initcall to subsys_initcall_sync"
From: Thomas Zimmermann <tzimmermann@xxxxxxx>
commit d1b163aa0749706379055e40a52cf7a851abf9dc upstream.
This reverts commit 60aebc9559492cea6a9625f514a8041717e3a2e4.
Commit 60aebc9559492cea ("drivers/firmware: Move sysfb_init() from
device_initcall to subsys_initcall_sync") messes up initialization order
of the graphics drivers and leads to blank displays on some systems. So
revert the commit.
To make the display drivers fully independent from initialization
order requires to track framebuffer memory by device and independently
from the loaded drivers. The kernel currently lacks the infrastructure
to do so.
Reported-by: Jaak Ristioja <jaak@xxxxxxxxxxx>
Closes: https://lore.kernel.org/dri-devel/ZUnNi3q3yB3zZfTl@P70.localdomain/T/#t
Reported-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
Closes: https://lore.kernel.org/dri-devel/20231108024613.2898921-1-chenhuacai@xxxxxxxxxxx/
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/10133
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Cc: Javier Martinez Canillas <javierm@xxxxxxxxxx>
Cc: Thorsten Leemhuis <regressions@xxxxxxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v6.5+
Reviewed-by: Javier Martinez Canillas <javierm@xxxxxxxxxx>
Acked-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240123120937.27736-1-tzimmermann@xxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/firmware/sysfb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/firmware/sysfb.c
+++ b/drivers/firmware/sysfb.c
@@ -128,4 +128,4 @@ unlock_mutex:
}
/* must execute after PCI subsystem for EFI quirks */
-subsys_initcall_sync(sysfb_init);
+device_initcall(sysfb_init);
Patches currently in stable-queue which might be from tzimmermann@xxxxxxx are
queue-6.6/sh-ecovec24-rename-missed-backlight-field-from-fbdev.patch
queue-6.6/revert-drivers-firmware-move-sysfb_init-from-device_initcall-to-subsys_initcall_sync.patch
