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([171.61.163.197]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-35b98f0e5a6sm2547141a91.5.2026.03.15.15.20.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 15 Mar 2026 15:20:28 -0700 (PDT) From: Atharva Tiwari To: Cc: Atharva Tiwari , Ard Biesheuvel , Hans de Goede , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , 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 Message-ID: <20260315222020.24341-1-atharvatiwarilinuxdev@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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