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Sun, 14 Jun 2026 07:51:36 -0700 (PDT) Received: from aegis ([2001:fd8:4d03:c800:f499:6f6c:fbd4:8f]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2c4327acca5sm66746385ad.51.2026.06.14.07.51.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 14 Jun 2026 07:51:36 -0700 (PDT) From: Daniel J Blueman To: "Bryan O'Donoghue" , Vikash Garodia , Abhinav Kumar , Bjorn Andersson , Konrad Dybcio Cc: Daniel J Blueman , Mauro Carvalho Chehab , Stephan Gerhold , 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, stable@vger.kernel.org Subject: [PATCH v2 1/2] dt-bindings: media: qcom,sm8550-iris: Allow IOVA reservation memory-region Date: Sun, 14 Jun 2026 22:51:11 +0800 Message-ID: <20260614145113.84243-1-daniel@quora.org> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: stable@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. Fixes: 9065340ac04d ("arm64: dts: qcom: x1e80100: Add IRIS video codec") Cc: stable@vger.kernel.org Signed-off-by: Daniel J Blueman --- v2: - drop redundant maxItems, keeping the items descriptions (Rob) - add Fixes tag and Cc stable for the backport dependency v1: https://lore.kernel.org/lkml/20260601041336.9497-1-daniel@quora.org/ .../devicetree/bindings/media/qcom,sm8550-iris.yaml | 5 ++++- 1 file changed, 4 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..5abcaee4101c 100644 --- a/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml +++ b/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml @@ -80,7 +80,10 @@ properties: dma-coherent: true memory-region: - maxItems: 1 + minItems: 1 + items: + - description: Firmware-loaded codec carveout + - description: IOMMU IOVA reservation region operating-points-v2: true -- 2.53.0