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[2003:e4:1f29:1e00:f22f:74ff:fe1f:3a53]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-45eb6d4850dsm2798642f8f.17.2026.05.22.03.10.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 May 2026 03:10:25 -0700 (PDT) Date: Fri, 22 May 2026 12:10:23 +0200 From: Thierry Reding To: Akhil R Cc: Vinod Koul , Frank Li , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jonathan Hunter , Laxman Dewangan , Philipp Zabel , dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v6 03/10] dt-bindings: dma: nvidia,tegra186-gpc-dma: Add iommu-map property Message-ID: References: <20260331102303.33181-1-akhilrajeev@nvidia.com> <20260331102303.33181-4-akhilrajeev@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="cfuujhnhen7f4kbw" Content-Disposition: inline In-Reply-To: <20260331102303.33181-4-akhilrajeev@nvidia.com> --cfuujhnhen7f4kbw Content-Type: text/plain; protected-headers=v1; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: [PATCH v6 03/10] dt-bindings: dma: nvidia,tegra186-gpc-dma: Add iommu-map property MIME-Version: 1.0 On Tue, Mar 31, 2026 at 03:52:56PM +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. >=20 > Define the constraints such that if the channel and stream IDs are > contiguous, a single entry can map all the channels, but if the > channels or stream IDs are non-contiguous support multiple entries. >=20 > Signed-off-by: Akhil R > Acked-by: Rob Herring (Arm) > --- > .../devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml | 9 +++++++++ > 1 file changed, 9 insertions(+) Acked-by: Thierry Reding --cfuujhnhen7f4kbw Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEiOrDCAFJzPfAjcif3SOs138+s6EFAmoQK48ACgkQ3SOs138+ s6GAew/+JcdwaY780zCzuK455YnQ+eLwg86S3a4AOS3x5iG0/m8f2Amil+VB72nZ ci4+qK7+yV8+3+6uldI0g7LZDzGflpyZrUDNuQLCfj+vYmEb61o1JoZbNhoE9+ic nag0sS5coucJKY2Gc3RD357norEY3DBhMNTr28tn58ydg442Uq2gx/6ZVK9GnYfF XgK3rr80mq7WB2bVqK3GTiC814TPhlldNXxFxqRV8y4h/D764MMQ9qHocmgx2qW4 5I8InPisLbTCb8p8HBwRlA3h8YYMsMth3CHVUXXkmTb8NBEmjfQnoDWB4pxmIpf/ KzJb+/Qk9OTBOhy86/zUp+fCY4KZvNKcD8csC84lEIzPzUuRcIFv6ILoGvzUo4EO YwuDJpsMrOf1K1K5hHm9qGugZ2DBSK4Vx4fOUBWoZIjGH2/TRCg7Pn6JBhJuT5o8 hThxuFO8909jWAoKMknu1oQD6ShIuVj+FbDWHhYAlbI5Dj+mT7QtQ1z750r0gtj0 2RkRveEDOOUuv+Zla1iw3NQkkSLogplGwIp/OVbyzkNCkxClBkWP/7/D2c9+ZdOU orMrAVeNg3+t+xWUKNNsTIJs7UHY/Ijp9T+msaNIZnojc0XnIGHfcTHDJIWeXhnD Ze6C+O9gJTwgdsYARNevxitPP2/O4tnp6JP22PWc6ueoyrvbSxA= =xacF -----END PGP SIGNATURE----- --cfuujhnhen7f4kbw--