linux-kernel - [PATCH V2] iommu/arm-smmu: add actlr settings for mdss on sa8775p platform

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Message-Id: <20251118171822.3539062-1-charan.kalla@oss.qualcomm.com>
Date: Tue, 18 Nov 2025 22:48:22 +0530
From: Charan Teja Kalla <charan.kalla@....qualcomm.com>
To: konrad.dybcio@....qualcomm.com, robin.clark@....qualcomm.com,
        will@...nel.org, robin.murphy@....com, joro@...tes.org,
        dmitry.baryshkov@....qualcomm.com
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>
Subject: [PATCH V2] iommu/arm-smmu: add actlr settings for mdss on sa8775p platform

Add ACTLR settings for the mdss device on Qualcomm SA8775P platform.
This is achieved by adding compatibility string for mdss in the actlr
client of match table.

Signed-off-by: Charan Teja Kalla <charan.kalla@....qualcomm.com>
---

Changed 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 | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index 62874b18f645..0b400e22cb00 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -41,6 +41,8 @@ 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,sa8775p-mdss",
+			.data = (const void *) (PREFETCH_DEFAULT | CMTLB) },
 	{ .compatible = "qcom,sc7280-mdss",
 			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
 	{ .compatible = "qcom,sc7280-venus",
-- 
2.34.1