Re: [PATCH 5/5] iommu/arm-smmu: Add qcom,shikra-mdss to Qualcomm SMMU client tables

[Dmitry Baryshkov]

On Wed, Jun 03, 2026 at 08:29:30PM +0530, Nabige Aala wrote:
> Register the Shikra MDSS display subsystem in both the SMMU ACTLR
> client table (for TLB prefetch tuning) and the SMMU client match table.
> 
> Shikra MDSS uses qcom,shikra-mdss as its sole compatible string, so
> explicit entries are required — there is no fallback to qcom,qcm2290-mdss
> to fall back on. The prefetch settings mirror qcm2290-mdss
> (PREFETCH_SHALLOW | CPRE | CMTLB) as Shikra shares the same display
> hardware block.
> 
> No entry is needed in qcom_smmu_impl_of_match: Shikra's apps_smmu
> carries qcom,smmu-500 as a fallback and is covered by the catch-all
> entry there.
> 
> Signed-off-by: Nabige Aala <nabige.aala@xxxxxxxxxxxxxxxx>
> ---
>  drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 3 +++
>  1 file changed, 3 insertions(+)
> 

NAK, use qcm2290 as a fallback. You won't need this patch.

-- 
With best wishes
Dmitry