From: Pankaj Patil <pankaj.patil@oss.qualcomm.com>
To: Lokanadha M R <lokanadha.r@oss.qualcomm.com>,
Rob Clark <robin.clark@oss.qualcomm.com>,
Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Joerg Roedel <joro@8bytes.org>
Cc: iommu@lists.linux.dev, linux-arm-msm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] iommu/arm-smmu-qcom: Add glymur MDSS to ACTLR client table
Date: Tue, 5 May 2026 16:24:51 +0530 [thread overview]
Message-ID: <96daa0ee-4cbb-4472-ab3a-19ee32b4758f@oss.qualcomm.com> (raw)
In-Reply-To: <20260428-add_glymur_mdss_compatible-v1-1-8416df5a26f4@oss.qualcomm.com>
On 4/28/2026 3:13 PM, Lokanadha M R wrote:
> Add qcom,glymur-mdss to the qcom_smmu_actlr_client_of_match[]
> table to configure the SMMU-500 context bank for the display
> subsystem (MDSS) on the Glymur platform.
>
> The settings disable the next-page prefetcher while keeping
> macro TLB caching enabled. Without this entry,
> qcom_smmu_set_actlr_dev() finds no match for the glymur MDSS
> device and leaves the context bank ACTLR at its reset value.
>
> Signed-off-by: Lokanadha M R <lokanadha.r@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 edd41b5a3b6a..6df48499a4b2 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,glymur-mdss",
> + .data = (const void *) (PREFETCH_DEFAULT | CMTLB) },
> { .compatible = "qcom,qcm2290-mdss",
> .data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
> { .compatible = "qcom,sa8775p-mdss",
>
> ---
> base-commit: 7080e32d3f09d8688c4a87d81bdcc71f7f606b16
> change-id: 20260428-add_glymur_mdss_compatible-44f5b2837498
>
> Best regards,
> --
> Lokanadha M R <lokanadha.r@oss.qualcomm.com>
>
>
Reviewed-by: Pankaj Patil <pankaj.patil@oss.qualcomm.com>
prev parent reply other threads:[~2026-05-05 10:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-28 9:43 [PATCH] iommu/arm-smmu-qcom: Add glymur MDSS to ACTLR client table Lokanadha M R
2026-04-28 10:26 ` Dmitry Baryshkov
2026-05-05 10:54 ` Pankaj Patil [this message]
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