linux-kernel - [PATCH v5] iommu/arm-smmu-qcom: Request direct mapping for modem device

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Date:   Fri,  8 May 2020 00:51:57 +0530
From:   Sibi Sankar <sibis@...eaurora.org>
To:     will@...nel.org, robin.murphy@....com, joro@...tes.org
Cc:     bjorn.andersson@...aro.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org, dianders@...omium.org,
        evgreen@...omium.org, mka@...omium.org, swboyd@...omium.org,
        Sibi Sankar <sibis@...eaurora.org>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
Subject: [PATCH v5] iommu/arm-smmu-qcom: Request direct mapping for modem device

The modem remote processor has two modes of access to the DDR, a direct
mode and through a SMMU which requires direct mapping. The configuration
of the modem SIDs is handled in TrustZone. On platforms where TrustZone
is absent this needs to be explicitly done from kernel. Add compatibles
for modem to opt in for direct mapping on such platforms.

Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
---

V5
 * Reword commit message and drop unnecessary details

 drivers/iommu/arm-smmu-qcom.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/arm-smmu-qcom.c b/drivers/iommu/arm-smmu-qcom.c
index 5bedf21587a56..cf01d0215a397 100644
--- a/drivers/iommu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm-smmu-qcom.c
@@ -17,7 +17,9 @@ static const struct of_device_id qcom_smmu_client_of_match[] = {
 	{ .compatible = "qcom,mdp4" },
 	{ .compatible = "qcom,mdss" },
 	{ .compatible = "qcom,sc7180-mdss" },
+	{ .compatible = "qcom,sc7180-mss-pil" },
 	{ .compatible = "qcom,sdm845-mdss" },
+	{ .compatible = "qcom,sdm845-mss-pil" },
 	{ }
 };
 
-- 
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