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

Charan Teja Kalla posted 1 patch 1 week ago 
drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
[PATCH V3] iommu/arm-smmu: add actlr settings for mdss on Qualcomm platforms
Posted by Charan Teja Kalla 1 week ago 
Add ACTLR settings for missing MDSS devices on Qualcomm platforms.

These are QoS settings and are specific to per SoC thus different
settings, eg: some have shallow prefetch while others have no
prefetch.

Signed-off-by: Charan Teja Kalla <charan.kalla@oss.qualcomm.com>
---
Changes from V2:
 1) Add actlr settings for all the mdss devices on Qualcomm platforms.
 2) Improved the commit message that explain why different ACTLR
    settings
https://lore.kernel.org/lkml/20251118171822.3539062-1-charan.kalla@oss.qualcomm.com/#t

Changes from V1:
  1) Added actlr setting only for MDSS and dropped for fastrpc. --
konrad
  2) ACTLR table is updated per alphanumeric order -- konrad 
  https://lore.kernel.org/all/20251105075307.1658329-1-charan.kalla@oss.qualcomm.com/


 drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

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) },
+	{ .compatible = "qcom,sm6125-mdss",
+			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
+	{ .compatible = "qcom,sm6350-mdss",
+			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
+	{ .compatible = "qcom,sm8150-mdss",
+			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
+	{ .compatible = "qcom,sm8250-mdss",
+			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
+	{ .compatible = "qcom,sm8350-mdss",
+			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
+	{ .compatible = "qcom,sm8450-mdss",
+			.data = (const void *) (PREFETCH_DEFAULT | CMTLB) },
 	{ .compatible = "qcom,sm8550-mdss",
 			.data = (const void *) (PREFETCH_DEFAULT | CMTLB) },
+	{ .compatible = "qcom,sm8650-mdss",
+			.data = (const void *) (PREFETCH_DEFAULT | CMTLB) },
+	{ .compatible = "qcom,sm8750-mdss",
+			.data = (const void *) (PREFETCH_DEFAULT | CMTLB) },
+	{ .compatible = "qcom,x1e80100-mdss",
+			.data = (const void *) (PREFETCH_DEFAULT | CMTLB) },
 	{ }
 };
 
-- 
2.34.1
Re: [PATCH V3] iommu/arm-smmu: add actlr settings for mdss on Qualcomm platforms
Posted by Dmitry Baryshkov 5 days, 22 hours ago 
On Mon, Nov 24, 2025 at 10:40:30PM +0530, Charan Teja Kalla wrote:
> Add ACTLR settings for missing MDSS devices on Qualcomm platforms.
> 
> These are QoS settings and are specific to per SoC thus different
> settings, eg: some have shallow prefetch while others have no
> prefetch.
> 
> Signed-off-by: Charan Teja Kalla <charan.kalla@oss.qualcomm.com>
> ---
> Changes from V2:
>  1) Add actlr settings for all the mdss devices on Qualcomm platforms.
>  2) Improved the commit message that explain why different ACTLR
>     settings
> https://lore.kernel.org/lkml/20251118171822.3539062-1-charan.kalla@oss.qualcomm.com/#t
> 
> Changes from V1:
>   1) Added actlr setting only for MDSS and dropped for fastrpc. --
> konrad
>   2) ACTLR table is updated per alphanumeric order -- konrad 
>   https://lore.kernel.org/all/20251105075307.1658329-1-charan.kalla@oss.qualcomm.com/
> 
> 
>  drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
> 
> 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?

> +	{ .compatible = "qcom,sm6125-mdss",
> +			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
> +	{ .compatible = "qcom,sm6350-mdss",
> +			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
> +	{ .compatible = "qcom,sm8150-mdss",
> +			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
> +	{ .compatible = "qcom,sm8250-mdss",
> +			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
> +	{ .compatible = "qcom,sm8350-mdss",
> +			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
> +	{ .compatible = "qcom,sm8450-mdss",
> +			.data = (const void *) (PREFETCH_DEFAULT | CMTLB) },
>  	{ .compatible = "qcom,sm8550-mdss",
>  			.data = (const void *) (PREFETCH_DEFAULT | CMTLB) },
> +	{ .compatible = "qcom,sm8650-mdss",
> +			.data = (const void *) (PREFETCH_DEFAULT | CMTLB) },
> +	{ .compatible = "qcom,sm8750-mdss",
> +			.data = (const void *) (PREFETCH_DEFAULT | CMTLB) },
> +	{ .compatible = "qcom,x1e80100-mdss",
> +			.data = (const void *) (PREFETCH_DEFAULT | CMTLB) },
>  	{ }
>  };
>  
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry
Re: [PATCH V3] iommu/arm-smmu: add actlr settings for mdss on Qualcomm platforms
Posted by Charan Teja Kalla 5 days, 12 hours ago 

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

Patchew 2.1-devel-b67e4c2

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