Re: [PATCH 2/3] iommu/qcom: Use identity default domains for the MSM GPU and display

[Konrad Dybcio]

On 10/30/26 11:04 PM, Dmitry Baryshkov wrote:
> drm/msm writes the addresses dma_map_sgtable() returns for the DRM
> device into its own page tables, so they have to be physical addresses,
> i.e. the device must not use iommu-dma. qcom_iommu has no
> def_domain_type, so the MDP5 and Adreno devices do get iommu-dma, the
> buffers end up mapped at IOVAs of the unused default domain and the
> db410c GPU fails to start.
> 
> Use identity default domains for these devices, as arm-smmu-qcom does.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxxxxxxxx>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>

Konrad