linux-kernel - [PATCH AUTOSEL 6.6 2/9] iommu/arm-smmu-qcom: add sdm670 adreno iommu compatible

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Message-Id: <20250126150839.962669-2-sashal@kernel.org>
Date: Sun, 26 Jan 2025 10:08:30 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Richard Acayan <mailingradian@...il.com>,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	Will Deacon <will@...nel.org>,
	Sasha Levin <sashal@...nel.org>,
	robdclark@...il.com,
	joro@...tes.org,
	iommu@...ts.linux.dev,
	linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH AUTOSEL 6.6 2/9] iommu/arm-smmu-qcom: add sdm670 adreno iommu compatible

From: Richard Acayan <mailingradian@...il.com>

[ Upstream commit 42314738906380cbd3b6e9caf3ad34e1b2d66035 ]

Add the compatible for the separate IOMMU on SDM670 for the Adreno GPU.

This IOMMU has the compatible strings:

	"qcom,sdm670-smmu-v2", "qcom,adreno-smmu", "qcom,smmu-v2"

While the SMMU 500 doesn't need an entry for this specific SoC, the
SMMU v2 compatible should have its own entry, as the fallback entry in
arm-smmu.c handles "qcom,smmu-v2" without per-process page table support
unless there is an entry here. This entry can't be the
"qcom,adreno-smmu" compatible because dedicated GPU IOMMUs can also be
SMMU 500 with different handling.

Signed-off-by: Richard Acayan <mailingradian@...il.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Link: https://lore.kernel.org/r/20241114004713.42404-6-mailingradian@gmail.com
Signed-off-by: Will Deacon <will@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index d491589360197..e6b4bab0dde2e 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -554,6 +554,7 @@ static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
 	{ .compatible = "qcom,sc8180x-smmu-500", .data = &qcom_smmu_500_impl0_data },
 	{ .compatible = "qcom,sc8280xp-smmu-500", .data = &qcom_smmu_500_impl0_data },
 	{ .compatible = "qcom,sdm630-smmu-v2", .data = &qcom_smmu_v2_data },
+	{ .compatible = "qcom,sdm670-smmu-v2", .data = &qcom_smmu_v2_data },
 	{ .compatible = "qcom,sdm845-smmu-v2", .data = &qcom_smmu_v2_data },
 	{ .compatible = "qcom,sdm845-smmu-500", .data = &sdm845_smmu_500_data },
 	{ .compatible = "qcom,sm6115-smmu-500", .data = &qcom_smmu_500_impl0_data},
-- 
2.39.5