linux-kernel - [PATCH v5] iommu/arm-smmu-qcom: add actlr settings for mdss on Qualcomm platforms

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Message-Id: <20251209052323.1133495-1-bibek.patro@oss.qualcomm.com>
Date: Tue,  9 Dec 2025 10:53:23 +0530
From: bibek.patro@....qualcomm.com
To: konrad.dybcio@....qualcomm.com, robin.clark@....qualcomm.com,
        dmitry.baryshkov@....qualcomm.com, will@...nel.org,
        robin.murphy@....com, joro@...tes.org
Cc: iommu@...ts.linux.dev, linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Charan Teja Kalla <charan.kalla@....qualcomm.com>,
        Bibek Kumar Patro <bibek.patro@....qualcomm.com>
Subject: [PATCH v5] iommu/arm-smmu-qcom: add actlr settings for mdss on Qualcomm platforms

From: Charan Teja Kalla <charan.kalla@....qualcomm.com>

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.

Aswell, this prefetch feature is not implemented for all the
platforms, capturing to those are implemented to the best of my
knowledge.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Signed-off-by: Charan Teja Kalla <charan.kalla@....qualcomm.com>
Signed-off-by: Bibek Kumar Patro <bibek.patro@....qualcomm.com>
---
Changes from V4:
 1) Change subject prefix to "iommu/arm-smmu-qcom:"
 based on the changes. -- Bjorn
https://lore.kernel.org/all/20251202125447.2102658-1-charan.kalla@oss.qualcomm.com/

Changes from V3:
 1) Add actlr setting for missing sc8180x & sm6115.
 2) Improved commit message.
https://lore.kernel.org/all/20251124171030.323989-1-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 | 26 ++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index 57c097e87613..c6645df97bbc 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -41,12 +41,38 @@ 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,sc8280xp-mdss",
+			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
+	{ .compatible = "qcom,sm6115-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