support PAS boot and flexible IOMMU handling#1138
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May 13, 2026 16:57
Add optional iommu-map property to the Qualcomm Venus video codec binding to describe IOMMU stream IDs for additional functional blocks exposed by the hardware. Update the example to show how the firmware stream can be mapped to an SMMU stream ID using a function identifier. Signed-off-by: Renjiang Han <renjiang.han@oss.qualcomm.com>
…ling On platforms where PAS is available, firmware authentication and reset are performed via the secure world, while IOMMU configuration may be handled either by Linux or outside of it. Extend the Venus firmware flow to support both PAS and non-PAS setups. When PAS is available, load the firmware using a PAS context and trigger the prepare/auth/reset sequence. If the firmware device is IOMMU-mapped, use its IOMMU domain to map the reserved firmware memory before reset; otherwise, retain the existing secure-world-managed behavior. When PAS is not available, fall back to the existing non-PAS firmware loading path where Linux performs firmware loading and IOMMU mapping. The firmware stream ID is described via the iommu-map function identifier in the device tree. Signed-off-by: Renjiang Han <renjiang.han@oss.qualcomm.com>
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On platforms where PAS is available, firmware authentication and reset
are performed via the secure world, while IOMMU configuration may be
handled either by Linux or outside of it.
Extend the Venus firmware flow to support both PAS and non-PAS setups.
The logic for creating the firmware device in the Venus driver was originally implemented by referring to the Iris driver.
However, based on the latest feedback from the community, the Iris driver is expected to create devices by implementing a proper bus_type. Iris driver will update the patch. As a result, the Venus driver needs to be updated to align with the Iris driver accordingly.
https://jira-dc.qualcomm.com/jira/browse/QLIJIRA-109
CRs-Fixed: 4534570