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 BA8123EBF10; Wed, 25 Mar 2026 16:35:54 +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=1774456554; cv=none; b=uCbO67iTkzC/EU5283BNAT3qlwjFlYKnYecohe9j2gyDXGjX3RL+vNMVWzinegpaH+r/nnnLqEUo94YxlAvuGSyNtkwwn30hRXsrj/uZO/YrbSm1szIcR8Jkp8DXpMylif3Ri9GTzC06NOybP+B3pqgKknJP7LpZ5bU4uS+j7mA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774456554; c=relaxed/simple; bh=LI4mvefpBAMZIzsTwcvsnXi2GtLLuZy+1O0BlNBcIec=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=BqcI9KF1cbBDFRH92VBHUGt95qxZmKHQNmdGzpyTxftYcLjzd8nqT1H3uHiIegxcTZ021nt186GKjo2NuYlgrizFnNwB1IJU/9SppOVWzNfHu/B2Qh2zvjgd5wJRnT6qqqHYuwt6XInflKioU91AaxBSuv4huG7KAkqGnD/WYSE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cbK0bPQS; 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="cbK0bPQS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 20C3BC19423; Wed, 25 Mar 2026 16:35:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774456554; bh=LI4mvefpBAMZIzsTwcvsnXi2GtLLuZy+1O0BlNBcIec=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=cbK0bPQS648nWoXO8iqU14ctH0BEet3og0P9tVx//wSK4CeDY9CXr42K+MzHbWV/G x/4E5egrpg3bl/1gPZ7Vj+vxzy1f76MI5bH3wgPPnBhyl1KRwarpxuFTIeOKAKcOpk lfGCpIUHzVdXSSK28XNPE7danREVQ246i4kWvoQuZZxerrLUxYEJBx9dFzgUz9ZRpp K9bbZhAMPCXf1oyCqy50gMO/yvpCHdB5R7PiFBvfDu6AW5Ch7neKAver3UhDIlx6GX PDkN0dyobMXfr74AYc8GGNL9fiTIVJUl81NMuQ2m1uuRp8xb4cIo23tOn7uB4heHQx qYUCn2kxOCXGg== Date: Wed, 25 Mar 2026 11:35:53 -0500 From: "Rob Herring (Arm)" To: Akhil R Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Frank Li , Jonathan Hunter , Vinod Koul , Krzysztof Kozlowski , Conor Dooley , Laxman Dewangan , dmaengine@vger.kernel.org, Thierry Reding , Philipp Zabel , linux-tegra@vger.kernel.org Subject: Re: [PATCH v3 1/9] dt-bindings: dma: nvidia,tegra186-gpc-dma: Add iommu-map property Message-ID: <177445655239.3768983.8317731580595020400.robh@kernel.org> References: <20260316171823.61800-1-akhilrajeev@nvidia.com> <20260316171823.61800-2-akhilrajeev@nvidia.com> Precedence: bulk X-Mailing-List: linux-tegra@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: <20260316171823.61800-2-akhilrajeev@nvidia.com> On Mon, 16 Mar 2026 22:48:15 +0530, Akhil R wrote: > Add iommu-map property to specify separate stream IDs for each DMA > channel. This enables each channel to be in its own IOMMU domain, > keeping memory isolated from other devices sharing the same DMA > controller. > > Define the constraints such that if the channel and stream IDs are > contiguous, a single entry can map all the channels. If the channels > or stream IDs are non-contiguous, support multiple entries. > > Signed-off-by: Akhil R > --- > .../devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml | 9 +++++++++ > 1 file changed, 9 insertions(+) > Acked-by: Rob Herring (Arm)