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Sun, 31 May 2026 21:14:51 -0700 (PDT) Received: from aegis ([175.176.67.81]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2bf23c3f496sm92980405ad.76.2026.05.31.21.14.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 31 May 2026 21:14:50 -0700 (PDT) From: Daniel J Blueman To: "Bryan O'Donoghue" , Vikash Garodia , Dikshita Agarwal , Abhinav Kumar , Bjorn Andersson , Konrad Dybcio Cc: Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-msm@vger.kernel.org, linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Daniel J Blueman Subject: [PATCH 1/2] dt-bindings: media: qcom,sm8550-iris: Allow IOVA reservation memory-region Date: Mon, 1 Jun 2026 12:13:33 +0800 Message-ID: <20260601041336.9497-1-daniel@quora.org> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit In addition to the firmware-loaded codec carveout, some Iris platforms need to declare an IOMMU IOVA reservation (a reserved-memory node with iommu-addresses) to keep DMA away from IOVA ranges that earlier firmware stages have already mapped through the SMMU. Permit a second memory-region phandle for this purpose, and describe the meaning of each entry so the ordering is unambiguous. Signed-off-by: Daniel J Blueman --- Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml b/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml index 9c4b760508b5..6359e4953d42 100644 --- a/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml +++ b/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml @@ -80,7 +80,11 @@ properties: dma-coherent: true memory-region: - maxItems: 1 + minItems: 1 + maxItems: 2 + items: + - description: Firmware-loaded codec carveout + - description: IOMMU IOVA reservation region operating-points-v2: true -- 2.53.0