From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4C1B22D3A6A; Thu, 26 Mar 2026 13:22:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774531328; cv=none; b=nABxUsRh5nPIBo+aQHNiqYIeHNqulA9rurRb0MoksNml5RD5Tb5QzcN/mlwH63OFNTIASCQoEBbnrfQ/fzdKXXOqtRM1mJrirzXE3AYlx8tmcbjuna4xtyPb0aWgzotx5/kbsQMwREkppTSRZmfwtAFnmp+Tk4V7cJGyb4JqgC4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774531328; c=relaxed/simple; bh=FqviOofHcupaR0PJdYP1xhrpYp3IqlmmCCw7Mja4j6U=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=iQdRhHaIeEGRSPrtEaZrhI+Bi49zFnB8hnVvcP2N18FBc/0Wyq66wonNCdoa4ZxIrMNnZQ/cERsPMe+uNshCceRgEoI/Gk+ihiSIBDz9siegtUT/XOmVn4WShuww/qvf1NRPvhDjwZyRMbSWAJ3RhKRsAib2qIkipltdz2iZH9s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=iTJWV+BH; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="iTJWV+BH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A2527C116C6; Thu, 26 Mar 2026 13:22:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774531327; bh=FqviOofHcupaR0PJdYP1xhrpYp3IqlmmCCw7Mja4j6U=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=iTJWV+BH76Iv2CnFB2JvggheKH4Xz8DIDxtX+r1t+NaDmOQEp8pdCWVyzjrkjQgDz gqmWL962pMBGyzd9aOon6+zH9Qu/wGfg006ldueWdYhJdQvm2LgTci2ErkRfqIiwOD nCCvXQLOCVskFFFE7LveT3cq1VZeKStCFYemyyh3GC6qVyEN3PREYKVQCCcRTvwrk8 hhr5xu+IBKo9SIuAGvjGogR4wlQX9eoPbthxENq8K1DTVS+sC0lyE8KWBkxHqYdaLX LvvMNvi/4fG012KPdbgkMgzJw5vH8OmYFCR0ADtF/G+3sNTV+57hArlB+Yb/hTEFVA pLBXjWyQ100lA== Date: Thu, 26 Mar 2026 08:22:05 -0500 From: "Rob Herring (Arm)" To: Srinivas Neeli Cc: Radhey Shyam Pandey , Michal Simek , Frank Li , devicetree@vger.kernel.org, git@amd.com, Conor Dooley , Vinod Koul , Tomi Valkeinen , Suraj Gupta , Abin Joseph , Thomas Gessler , Folker Schwesinger , linux-kernel@vger.kernel.org, Krzysztof Kozlowski , linux-arm-kernel@lists.infradead.org, dmaengine@vger.kernel.org, Kees Cook Subject: Re: [PATCH V2 4/5] dt-bindings: dma: xlnx,axi-dma: Add "xlnx,include-stscntrl-strm" property Message-ID: <177453132469.2249522.18301971752512802709.robh@kernel.org> References: <20260313062533.421249-1-srinivas.neeli@amd.com> <20260313062533.421249-5-srinivas.neeli@amd.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260313062533.421249-5-srinivas.neeli@amd.com> On Fri, 13 Mar 2026 11:55:32 +0530, Srinivas Neeli wrote: > Add an optional boolean DT property "xlnx,include-stscntrl-strm" to > indicate that the AXI DMA IP is configured with the AXI4-Stream status > and control interface. This enables the use of APP fields in DMA > descriptors for metadata reporting. > > This property is distinct from "xlnx,axistream-connected" and serves a > different purpose: > > - "xlnx,include-stscntrl-strm": Indicates whether APP fields are present > in DMA descriptors. When enabled, the driver can access status/control > metadata through these descriptor fields. > > - "xlnx,axistream-connected": Indicates whether a streaming IP (client) > is connected to the DMA IP. > > These two configurations are independent of each other. For example, in > TSN (Time-Sensitive Networking) designs, a streaming client may be > connected to the DMA IP, but the status/control stream interface is not > enabled. In such cases, "xlnx,axistream-connected" would be present while > "xlnx,include-stscntrl-strm" would be absent. > > Adding this property allows the driver to correctly determine descriptor > layout and access APP fields only when the hardware supports them. > > Signed-off-by: Suraj Gupta > Signed-off-by: Srinivas Neeli > --- > .../devicetree/bindings/dma/xilinx/xlnx,axi-dma.yaml | 4 ++++ > 1 file changed, 4 insertions(+) > Reviewed-by: Rob Herring (Arm)