From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E71B2C982DA for ; Fri, 18 Sep 2026 11:07:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Reply-To:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To: Content-Transfer-Encoding:Content-Type:MIME-Version:Message-Id:Date:Subject: From:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=dvMu4Vha5hCnDsJSbixHZ8VTIS4/Ze6JA3cplI8foos=; b=etCXy72jZPqoE0MAc5KIlU+rjL 2bN1cO9KkUBInwxymHYiE/5Ox9Yf434J4Oxey6BMywf2YO+hMblVc4WHO3qRfXaQA12S+rtTXG3xE OmwP1/NWfpkamPiUoxoFRESonAkG7SiUi57bz9SxEtWDnxThkS8ZVfMN+GifeGP682Hb1E1bVbVfd F23VmeLbEFm5F7cg5YD8ZtQS36Rc8lAsfBXUUr7ix46izfhYv7nOjqlOa6bhrTNyTDR+s2ZL0ojcd fSb3qHPsYuQBinG+kggPrw/n/re6wLqIX21h3i58EqMNC0WC5G0tOJTobzTD3wqMSu5AqjK+jPrKP MXOcyhcA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x7WQe-0000000EBCn-18fa; Fri, 18 Sep 2026 11:06:52 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x7WQc-0000000EBBc-4ASz for linux-arm-kernel@lists.infradead.org; Fri, 18 Sep 2026 11:06:51 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 5362743A04; Fri, 18 Sep 2026 11:06:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 2435CC2BCF6; Fri, 18 Sep 2026 11:06:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1789729610; bh=PawLXKvlJwv7D4KsJjXTvYA+h3NHb2+AdBM76dtcECM=; h=From:Subject:Date:To:Cc:Reply-To:From; b=O7SpKCnAchMviM60tVz+OncP9xqcXp740adol8HcbgG87moP/sz3Ab5zCF75KfSO5 DZ/ENgtEwLQug35EH2NDNoZGg1yy2rEEfDJzleVt2oyn+odxI890VE0Ai8v5OZI97L yLo1XJEYGkEoi5pVmtO2pTzc6R+HIIjmN4P5EqB8T5qYLmYOF2+7OWsOpDppgMTxHj 6n91Lfd6ZC04SjuKsmfvbGO8gZplp2rreHFLfM9ml6JJgSM//G0NYnBkM1OhUoS1xL jugnhrfZzH4ehXjFNtsL3y46YEcEYj6GhKjnbio/IQoAy+019yNj28APfgzRBndY0L QdLtH2UfcMFcA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id F0E9AC982D7; Fri, 18 Sep 2026 11:06:49 +0000 (UTC) From: Michael Reeves via B4 Relay Subject: [PATCH v2 00/10] Add support for Apple Silicon DockChannel internal keyboards Date: Fri, 18 Sep 2026 21:06:43 +1000 Message-Id: <20260918-apple-mtp-keyboard-final-v2-0-a5c685e50b60@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAAAAAAAC/6WPMQ6DMAxFr4Iy11WAEkSn3qNiMMGBqIQgB6Eix N1LmLp06vik7/fkTQRiS0Hck00wLTZYPx6QXRKhexw7AtseLDKZKamyCnCaBgI3T/CitfHILRg 74gBVqpsClTE3o8VxPjEZ+z7Vz/rgBgNBwzjqPgodhpk4Dg17B3PPhF+lXP4uLSlIKKRqq1xhW sry0Tm0w1V7F329DbPn9XxpSWP+T2e97/sHkmRq3ykBAAA= X-Change-ID: 20260629-apple-mtp-keyboard-final-91cb5a6ff4fc To: Sven Peter , Janne Grunau , Neal Gompa , Jassi Brar , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Hector Martin , Michael Reeves , "Joerg Roedel (AMD)" , Will Deacon , Robin Murphy , Dmitry Torokhov , Jiri Kosina , Benjamin Tissoires Cc: asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, iommu@lists.linux.dev, linux-input@vger.kernel.org, Yureka Lilian , Julian Braha , Sasha Finkelstein , Conor Dooley X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1789729608; l=5150; i=michael.reeves077@gmail.com; s=fedora-20260918; h=from:subject:message-id; bh=PawLXKvlJwv7D4KsJjXTvYA+h3NHb2+AdBM76dtcECM=; b=DyM1kiGNSg27vuEC2T7JPVm2q4rWEodR3Ak0dpi7DGHZb9sUGUPU7nvYtFL3gCq+RL/xA5/wt kORyTa+p2nFCwdMZwlGS4dnWRK/cgGi5vwoe7VjfsRsWtRbFvyW0p3d X-Developer-Key: i=michael.reeves077@gmail.com; a=ed25519; pk=VJ0TvyQ9TvfzYZa908YSE9kpkjFLLD5luv0bERu+boc= X-Endpoint-Received: by B4 Relay for michael.reeves077@gmail.com/fedora-20260918 with auth_id=1035 X-Original-From: Michael Reeves X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: michael.reeves077@gmail.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This series introduces support for the internal keyboards on Apple Silicon M2 and M3 MacBook models. On these platforms, built-in input devices are managed by a dedicated coprocessor running an RTKit-based operating system. Communication between this coprocessor and the main processor is carried out over a low-latency hardware byte FIFO interface called DockChannel. To support this input path, the series introduces a few new components: - An apple-dockchannel mailbox driver to handle the low-level byte-stream FIFO. - A DockChannel HID transport driver (apple-hid) that boots the coprocessor using the RTKit framework and encapsulates the HID protocol over the mailbox. - Minor additions to the apple-rtkit and hid-apple drivers to support the TraceKit endpoint and integrate the keyboards into the existing input-quirks framework. - Devicetree bindings and DTS updates to describe the nodes on M2 and M3 laptops. The transport driver is based on an original out-of-tree implementation by Hector Martin, but it has been significantly rewritten for upstream inclusion to use the standard Linux mailbox framework and align better with upstream HID design patterns and reduce reliance on hacks. While the coprocessor manages both the keyboard and the trackpad, this series only enables keyboard support. The keyboard can be initialised without loading external firmware, whereas the trackpad requires firmware. Trackpad support will be submitted in a subsequent series once these base transport layers are established. Tested on: MacBook Air M3 (J613). Signed-off-by: Michael Reeves Changes in v2: - Link to v1: https://lore.kernel.org/asahi/20260630-apple-mtp-keyboard-final-v1-0-506d936a1707@gmail.com/ - Rebase onto latest upstream and add M3 Pro/Max device-tree support. - Use an optional STM node to decide whether to wait for device IDs (suggested by Yureka Lilian). - Rename bindings to match the t8112 fallback (suggested by Conor Dooley). - Fix FIFO MMIO write width (suggested by Yureka Lilian) and run mailbox interrupt handling in the IRQ thread. - Remove the duplicate report fixup (suggested by Sasha Finkelstein) and redundant HID dependency (suggested by Julian Braha). - Fix teardown and the missing HID stop callback; simplify interface lookup. --- Michael Reeves (9): dt-bindings: mailbox: apple: Add M3 ASC mailbox compatibles dt-bindings: mailbox: apple: Add DockChannel mailbox dt-bindings: iommu: apple,dart: Add M3 compatibles dt-bindings: input: apple: Add DockChannel HID transport mailbox: apple: Add DockChannel FIFO controller HID: apple: Add support for DockChannel HID keyboards HID: apple: Add DockChannel HID transport driver arm64: dts: apple: Add MTP DockChannel HID nodes arm64: dts: apple: Enable DockChannel HID on M2 and M3 laptops Sasha Finkelstein (1): soc: apple: rtkit: Add tracekit endpoint .../input/apple,t8112-dockchannel-hid.yaml | 104 ++ .../devicetree/bindings/iommu/apple,dart.yaml | 6 +- .../devicetree/bindings/mailbox/apple,mailbox.yaml | 3 + .../bindings/mailbox/apple,t8112-dockchannel.yaml | 77 ++ MAINTAINERS | 5 + arch/arm64/boot/dts/apple/t602x-die0.dtsi | 46 + arch/arm64/boot/dts/apple/t602x-j414-j416.dtsi | 29 + arch/arm64/boot/dts/apple/t6030.dtsi | 46 + arch/arm64/boot/dts/apple/t6031-die0.dtsi | 46 + arch/arm64/boot/dts/apple/t603x-j514-j516.dtsi | 24 + arch/arm64/boot/dts/apple/t8112-j413.dts | 24 + arch/arm64/boot/dts/apple/t8112-j415.dts | 24 + arch/arm64/boot/dts/apple/t8112-j493.dts | 26 +- arch/arm64/boot/dts/apple/t8112.dtsi | 46 + arch/arm64/boot/dts/apple/t8122-j504.dts | 26 + arch/arm64/boot/dts/apple/t8122-j613.dts | 27 + arch/arm64/boot/dts/apple/t8122-j615.dts | 27 + arch/arm64/boot/dts/apple/t8122.dtsi | 47 + drivers/hid/Kconfig | 2 + drivers/hid/Makefile | 2 + drivers/hid/dockchannel/Kconfig | 14 + drivers/hid/dockchannel/Makefile | 3 + drivers/hid/dockchannel/apple-hid.c | 1157 ++++++++++++++++++++ drivers/hid/hid-apple.c | 117 +- drivers/mailbox/Kconfig | 12 + drivers/mailbox/Makefile | 2 + drivers/mailbox/apple-dockchannel.c | 371 +++++++ drivers/soc/apple/rtkit.c | 2 + include/linux/hid.h | 1 + include/linux/mailbox/apple-dockchannel.h | 29 + 30 files changed, 2297 insertions(+), 48 deletions(-) --- base-commit: 5dd1818b15d98d4a20806cd00b1b40320b06004f change-id: 20260629-apple-mtp-keyboard-final-91cb5a6ff4fc Best regards, -- Michael Reeves