[PATCH V3] iommu/arm-smmu: add actlr settings for mdss on Qualcomm platforms

[Charan Teja Kalla]

On 11/26/2025 7:21 AM, Dmitry Baryshkov wrote:
>> diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
>> index c21a401c71eb..ead1a59d40ae 100644
>> --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
>> +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
>> @@ -41,12 +41,34 @@ static const struct of_device_id qcom_smmu_actlr_client_of_match[] = {
>>  			.data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
>>  	{ .compatible = "qcom,fastrpc",
>>  			.data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
>> +	{ .compatible = "qcom,qcm2290-mdss",
>> +			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
>>  	{ .compatible = "qcom,sc7280-mdss",
>>  			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
>>  	{ .compatible = "qcom,sc7280-venus",
>>  			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
>> +	{ .compatible = "qcom,sc8180x-mdss",
>> +			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
> sc8280xp? sm6115?  sdm845? sdm660, msm8998?
8280 and 6115 is slipped....will update in next revision.

This Prefetch feature is not implemented for all the platforms, I
captured only to those that are implemented(to the best of my knowledge)
-- I will put this in commit message.

Thanks,
Charan