This is the revised fourth attempt of inheriting the stream mapping for the framebuffer on many Qualcomm platforms, in order to not hit catastrophic faults during arm-smmu initialization.
The new approach does, based on Robin's suggestion, take a much more direct approach with the allocation of a context bank for bypass emulation and use of this context bank pretty much isolated to the Qualcomm specific implementation. The patchset has been tested to boot DB845c and RB5 (with splash screen) and Lenovo Yoga C630 (with EFI framebuffer). Bjorn Andersson (3): iommu/arm-smmu: Allow implementation specific write_s2cr iommu/arm-smmu-qcom: Read back stream mappings iommu/arm-smmu-qcom: Implement S2CR quirk drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 90 ++++++++++++++++++++++ drivers/iommu/arm/arm-smmu/arm-smmu.c | 13 +++- drivers/iommu/arm/arm-smmu/arm-smmu.h | 1 + 3 files changed, 101 insertions(+), 3 deletions(-) -- 2.28.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
