From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=217.140.110.172 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794409668; b=MU75tVQnZEJ8FighoN2qn1ha530kguFtNHjO3SREOoxSIqvb0DulLWvMnmopaAKLJne+ 0obwwDGV2vnQywYa+yxi8yAWINsTLiSY1KPS5F3g7tyG5xNKPg1C+vspLgVnyrMlWDC0s HUpHaTZDupTOBbZkFgJhVnGXIS3jmV7aPbVtIPeYkCWrv1EqVaQ+hxtTB/7T57vH1HZ2k WS4vHCt6kAyTg0hqEYRKsOem3IAAErVo67zzEYA6+iIbMJfaoxMG8/ANyDIiJHLs+k9bX PvtA3mQCQuQm4MSSct6fOP9DiE0q67KkT9v7/u6yGcflUnKfJym8O4dXZk4J5QyoJ+w== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794409668; h=DMARC-Filter:Received:Received:DKIM-Signature:Date:From:To:Cc: Subject:Message-ID:References:MIME-Version:Content-Type: Content-Disposition:In-Reply-To; bh=IVSW7dlEtBAkMcVOOPixBHDjudsel8asjWSLmfExFeY=; b=ln/7Elik0HceRsya8erH6Hx6mJK0UupxIaODXPUbMgxYuXYFxl/vHXzPqY0j6LIbpoRV nRHSgq8OfHUL7NpfoguQbKhwje7kEueJRJbb0Cz+Md1K5VldMt/wd3mEvxk1r9Rq+Qu9L rD/z1Lc8f8snowjBQ//wOqFghW9AnGuqb8XIMtTDSY5Mk/eFNHQeD397ZDfjVnyuQ6D7s pODJrHrsRBFFShmEHzpGKU/B/bg4S3VVPQjC/QLpGl/nblZCb1tr7tkVLNIaHTi4uv4Ps 4f0FLz6SwK7X0+MqoVVEM3ySIn51zPL5O4dQJWAiuakhYQxy+kUQ6ZOG7m2qKfv1cDQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=VfZrepJ0; arc=none smtp.remote-ip=217.140.110.172 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id D24C5606A332; Wed, 11 Nov 2026 15:07:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org D24C5606A332 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=VfZrepJ0 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 3D8491576; Wed, 11 Nov 2026 07:07:44 -0800 (PST) Received: from localhost (unknown [10.2.196.114]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id D2F9F3F632; Wed, 11 Nov 2026 07:07:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1794409667; bh=62Mu4OB+5wrqIV2cz1Z1/DAKB6v44So/0ueSDYAy0eM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=VfZrepJ0INs9KzNnKkWmxJLRps9nRBYmn6mnATtZK6oQjjzaP2Cyyx2TN1dldFmns KnTJe8UyD60giCl785gSW8Jmg3o+OmikZi0qe5odXs+y92IHy7hf9N4u3BnGiR7mLQ cTG6viDoj2FMuBt2iHZiJm0wx8HO+9LXwSRHRZbg= Date: Wed, 11 Nov 2026 15:07:44 +0000 From: Leo Yan To: Suzuki K Poulose Cc: Rob Herring , Jie Gan , Mike Leach , James Clark , Krzysztof Kozlowski , Conor Dooley , Tingwei Zhang , Yuanfang Zhang , Alexander Shishkin , Bjorn Andersson , Konrad Dybcio , Abel Vesa , Jingyi Wang , linux-arm-msm@vger.kernel.org, coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Konrad Dybcio , Krzysztof Kozlowski Subject: Re: [PATCH v7 0/5] Fix traceNoC probe issue on multiple QCOM platforms Message-ID: <20261111150744.GC9176@e132581.arm.com> References: <20261110-fix-trace-noc-probe-issue-v7-0-2f06905c77fe@oss.qualcomm.com> <20261110154643.GA4159803-robh@kernel.org> <14c0956c-904e-4a6a-98a0-882514d77b08@arm.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <14c0956c-904e-4a6a-98a0-882514d77b08@arm.com> On Wed, Nov 11, 2026 at 12:58:59PM +0000, Suzuki K Poulose wrote: > On 10/11/2026 15:46, Rob Herring wrote: > > On Tue, Nov 10, 2026 at 09:21:13AM +0800, Jie Gan wrote: > > > The CoreSight TNOC (Trace Network-On-Chip) binding so far only allowed the > > > two-string AMBA form "qcom,coresight-tnoc", "arm,primecell". That form > > > forces the device onto the AMBA bus, where the driver must read the > > > peripheral ID from the device registers during probe. On several QCOM > > > platforms this AMBA peripheral-ID probing fails, so the traceNoC device > > > never probes and its trace path is unavailable. > > > > But it works fine on some platforms? We have a property to override the > > peripheral-ID which would solve your issue. That would be much simpler > > and avoid the ABI break on any of the working platforms. This series preserves support AMBA driver probe, "arm,primecell" would continue to work. > That is true ! Sorry, I didn't think of the quirk. If adding "arm,primecell-periphid" property resolves the issue, I agree that updating the DTS nodes would be better way to resolve issue (for this case, anyway it requires to update DT blobs on broken platforms). Thanks, Leo