From: Atharva Tiwari <atharvatiwarilinuxdev@gmail.com>
Cc: "Atharva Tiwari" <atharvatiwarilinuxdev@gmail.com>,
"Ard Biesheuvel" <ardb@kernel.org>,
"Hans de Goede" <hansg@kernel.org>,
"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
linux-kernel@vger.kernel.org (open list),
linux-efi@vger.kernel.org (open list:EXTENSIBLE FIRMWARE
INTERFACE (EFI)),
platform-driver-x86@vger.kernel.org (open list:X86 PLATFORM
DRIVERS)
Subject: [PATCH v3 0/2] Save Brightness on Macs
Date: Mon, 16 Mar 2026 03:49:58 +0530 [thread overview]
Message-ID: <20260315222020.24341-1-atharvatiwarilinuxdev@gmail.com> (raw)
We fix this by writing the brightness value to efivar 'backlight-level'
at shutdown only, when it is changed since the last boot.
Changes in v3:
- Fixed a bug, in which apple_brightness_shutdown is still called on
non-supported devices.
Changes in v2:
- Saved the brightness only when it is different than the previous boot.
Link to v2:
https://lore.kernel.org/all/20260315215302.24087-1-atharvatiwarilinuxdev@gmail.com/
Link to v1:
https://lore.kernel.org/all/20260206125641.12983-1-atharvatiwarilinuxdev@gmail.com/
Atharva Tiwari (2):
efi: Save Brightness using EFI on Macs
platform/apple-gmux: use apple_brightness to save brightness to EFI
drivers/firmware/efi/Kconfig | 10 +++
drivers/firmware/efi/Makefile | 1 +
drivers/firmware/efi/apple-brightness.c | 67 +++++++++++++++++++
drivers/platform/x86/apple-gmux.c | 21 ++++++
.../linux/platform_data/apple-brightness.h | 20 ++++++
5 files changed, 119 insertions(+)
create mode 100644 drivers/firmware/efi/apple-brightness.c
create mode 100644 include/linux/platform_data/apple-brightness.h
--
2.43.0
next reply other threads:[~2026-03-15 22:20 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-15 22:19 Atharva Tiwari [this message]
2026-03-15 22:19 ` [PATCH v3 1/2] efi: Save Brightness using EFI on Macs Atharva Tiwari
2026-03-15 22:47 ` Randy Dunlap
2026-03-15 22:20 ` [PATCH v3 2/2] platform/apple-gmux: use apple_brightness to save brightness to EFI Atharva Tiwari
2026-03-16 10:16 ` kernel test robot
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