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Mon, 09 Nov 2026 01:44:37 -0800 (PST) Received: from torstein-desktop.internal ([2a01:799:3a1:9700:6e3a:d704:53e2:f00e]) by smtp.googlemail.com with ESMTPSA id a640c23a62f3a-c4d6a4753aasm137786866b.45.2026.11.09.01.44.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Nov 2026 01:44:36 -0800 (PST) Sender: Torstein Eide From: Torstein Eide To: Jiri Kosina , Benjamin Tissoires Cc: Hans de Goede , Maoyi Xie , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/4] HID: lg-g15: G15 v2 LCD and game-mode support Date: Mon, 9 Nov 2026 10:44:22 +0100 Message-ID: <20261109094426.1432465-1-torsteine+linux@gmail.com> X-Mailer: git-send-email 2.53.0 X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This series adds support for more of the Logitech G15 v2 hardware to hid-lg-g15, plus a fix for the remove path. Patch 1 exposes the GamePanel LCD contrast as a g15::lcd_contrast LED. Patch 2 adds an optional fbdev framebuffer (HID_LOGITECH_G15_FB) for the 160x43 monochrome LCD, updated through deferred I/O, so userspace can draw on the LCD or bind fbcon to it without libg15/g15daemon. Patch 3 binds the G15 v2's second interface (046D:C226), which is currently handled by hid-generic, and exposes the Super-key-lock ("Game Mode") state as a read-only g15::game_mode LED. Normal key input on that interface is left to hid-input. Patch 4 fixes a use-after-free on remove: the LED work can be rescheduled by a key press between cancel_work_sync() and hid_hw_stop(). The bug predates this series, but the patch is written against the remove path as changed by patches 1-3, so it does not apply to the current tree on its own. The LCD wire format and contrast commands follow libg15, hence the Based-on-work-by tags for its authors. All patches were tested on a Logitech G15 v2. Torstein Eide (4): HID: lg-g15: add LCD contrast LED HID: lg-g15: add LCD pixel-content framebuffer HID: lg-g15: report Super-key-lock state on G15 v2's keyboard interface HID: lg-g15: cancel LED work only after stopping the hardware drivers/hid/Kconfig | 13 + drivers/hid/hid-ids.h | 1 + drivers/hid/hid-lg-g15.c | 599 ++++++++++++++++++++++++++++++++++++++- 3 files changed, 606 insertions(+), 7 deletions(-) -- 2.53.0