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 192FFC61DD3 for ; Tue, 1 Sep 2026 09:04:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=x5HQxmAA8fLOqPWiGcjUafFj8wQkUmhK6xdywAwg13U=; b=SiWltggxdG/g3Ntq0FXB6a2K8O GjYRv3u9puRjWuIT0D2xoHydoDTlrWLxawTjuWJjvIWlLZXnurn0jQ67mV7nRE+tm4nPPtxBoQ1Tk unQv/xp70sw6EfcgfrTp0+y9HlLEgrBh8iFmRYu5id0MxBm2nt6Z9AzdWxrW1i8vp7rMUsz2kRsyy CJmfwR9f4RjVZtbFHE6q64mlkuI/kbwZS0MSfSIisE45sxXS59VCdxuzP9HFfea28i0vf0QQAxTkC GOxohwW8urXV+o8Ezq5Cqtp2D6c1rgoYoFDlhFc88I07jjVprmSUeKeuUMpu+4VkS430ygx7tz6mx 0Ikg/pPw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x1KQA-0000000BMmx-20Gq; Tue, 01 Sep 2026 09:04:46 +0000 Received: from mgamail.intel.com ([198.175.65.19]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x1KQ8-0000000BMmC-38iP for linux-arm-kernel@lists.infradead.org; Tue, 01 Sep 2026 09:04:46 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1788253485; x=1819789485; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=x5HQxmAA8fLOqPWiGcjUafFj8wQkUmhK6xdywAwg13U=; b=W8dGP2BhWv4pDpry8NCEettNgRZrd7H7HIrSEk+375F9LA297p3xNFWe q5xFEREYxmCdOMPmJPOQfDxQii74ZJQowYnazOT1uRYUtE7R7mI0NMPW8 711jssH1IXJwzzlFga2m7Q2AI2ZFXtFv2501CbubVZOQLKFVoM7L4m9LY kr3g+o/wSDaxSwPJ+bzSKhRYOOmdTVfn5ZwJGOEruIiYRHI3M1p3AUlE1 d3ss1l7xovAZs0iZhjoTXIgR8pIQWFkgQ7KHXOp2UMMheBNwRMN9woWlq 5Kn3g03634Pm1tDUjqWr3bwJamoNj6u4iVrYpS6Ecx9xzs26UjHp9Nu5J w==; X-CSE-ConnectionGUID: 8KghiK7eSbe5usp+fgSIfQ== X-CSE-MsgGUID: cAc9KAQeQTGra2+sq/CPNw== X-IronPort-AV: E=McAfee;i="6800,10657,11892"; a="88603135" X-IronPort-AV: E=Sophos;i="6.25,255,1779174000"; d="scan'208";a="88603135" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by orvoesa111.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Sep 2026 02:04:44 -0700 X-CSE-ConnectionGUID: IBkMqBNFSIKAR7s3wZDz1w== X-CSE-MsgGUID: /TPPfTzpR4S/wobxErPGcw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,255,1779174000"; d="scan'208";a="264752931" Received: from black.igk.intel.com ([10.91.253.5]) by fmviesa006.fm.intel.com with ESMTP; 01 Sep 2026 02:04:40 -0700 Received: by black.igk.intel.com (Postfix, from userid 1001) id 8318899; Tue, 01 Sep 2026 11:04:39 +0200 (CEST) Date: Tue, 1 Sep 2026 11:04:39 +0200 From: Mika Westerberg To: Sven Peter Cc: Greg Kroah-Hartman , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heikki Krogerus , Janne Grunau , Neal Gompa , Andreas Noever , Mika Westerberg , Yehezkel Bernat , Philipp Zabel , Konrad Dybcio , linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH 13/19] thunderbolt: Add QUIRK_NO_DMA_PORT Message-ID: <20260901090439.GD106095@black.igk.intel.com> References: <20260830-b4-apple-soc-tbt-v1-0-44bc9348683c@kernel.org> <20260830-b4-apple-soc-tbt-v1-13-44bc9348683c@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20260830-b4-apple-soc-tbt-v1-13-44bc9348683c@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260901_020444_830657_3AA89493 X-CRM114-Status: GOOD ( 13.16 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, On Sun, Aug 30, 2026 at 10:19:31PM +0200, Sven Peter wrote: > Apple Silicon machines load and update the host router firmware with a > separate, proprietary mechanism and have no DMA port. Add a quirk to > skip its initialization. DMA port is Intel Thunderbolt 1-3 thing and not expected to found on USB4 routers. The current code should not even be trying to find it, if it does then that's a bug that should be fixed. USB4 router firmware upgrades use the standard operations and if those are not supported then we just don't expose the corresponding NVMem nodes.