FROMLIST: arm64: dts: qcom: sc7280: Add dma-coherent property - #1641
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FROMLIST: arm64: dts: qcom: sc7280: Add dma-coherent property#1641gouravk-qualcomm wants to merge 1 commit into
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…nus node While testing with some higher resolution clips, the venus hardware triggers a fault due to wrong input data being received. Corruption was also observed in the captured output when the client dumped it to a file. On debugging, this was traced to the venus node not declaring dma-coherent. As a result, DMA buffers shared between the CPU and the venus video hardware/controller are not guaranteed to be I/O coherent: CPU writes to an input buffer can remain in CPU caches without being visible to the video hardware when it reads the same buffer, so the hardware receives input data that does not match what the CPU wrote. Likewise, on the capture path, data written by the video hardware to the output buffer may not be visible to the CPU, so the client reads stale or partial data, resulting in corruption. Add the dma-coherent property to the venus node so that DMA buffers shared between the CPU and the video hardware and controller remain coherent. Link: https://lore.kernel.org/all/20260801-iris-fixes-dma-pseq-fint-v1-2-aba0cb22f6ab@oss.qualcomm.com/ Fixes: 37613ae ("arm64: dts: qcom: sc7280: Add venus DT node") Cc: stable@vger.kernel.org Signed-off-by: Vishnu Reddy <busanna.reddy@oss.qualcomm.com>
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Komal Bajaj (Komal-Bajaj),
Dmitry Baryshkov (lumag) and
Shiraz Hashim (shashim-quic)
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August 4, 2026 19:46
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DMA coherency fix for sc7280 venus node (dts ): The venus DT node was missing dma-coherent, so DMA buffers shared between the CPU and the venus hardware were not guaranteed I/O coherent. This caused hardware faults with high-resolution clips and data corruption in captured output. Adds dma-coherent to the binding and to the sc7280 venus node.
Depends-On :#1640
CRs-fixed: 4446385