linux-kernel - [PATCH v2 2/3] remoteproc: qcom_q6v5_mss: Request direct mapping for modem device

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Message-Id: <20200317150910.26053-3-sibis@codeaurora.org>
Date:   Tue, 17 Mar 2020 20:39:09 +0530
From:   Sibi Sankar <sibis@...eaurora.org>
To:     bjorn.andersson@...aro.org, robh+dt@...nel.org, joro@...tes.org,
        robin.murphy@....com
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, iommu@...ts.linux-foundation.org,
        linux-remoteproc@...r.kernel.org, ohad@...ery.com,
        agross@...nel.org, dianders@...omium.org,
        Sibi Sankar <sibis@...eaurora.org>
Subject: [PATCH v2 2/3] remoteproc: qcom_q6v5_mss: Request direct mapping for modem device

Request direct mapping for modem on platforms which don't have TrustZone
(which programs the modem SIDs) to prevent the following global faults seen
on Cheza/Trogdor:

arm-smmu 15000000.iommu: Unexpected global fault, this could be serious
arm-smmu 15000000.iommu: GFSR 0x80000002, GFSYNR0 0x00000000,
			 GFSYNR1 0x00000781, GFSYNR2 0x00000000

arm-smmu 15000000.iommu: Unexpected global fault, this could be serious
arm-smmu 15000000.iommu: GFSR 0x80000002, GFSYNR0 0x00000000,
			 GFSYNR1 0x00000461, GFSYNR2 0x00000000

Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
---
 drivers/iommu/arm-smmu-qcom.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/iommu/arm-smmu-qcom.c b/drivers/iommu/arm-smmu-qcom.c
index ff746acd1c816..5dd7a788f59e1 100644
--- a/drivers/iommu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm-smmu-qcom.c
@@ -20,12 +20,18 @@ static const struct arm_smmu_client_match_data qcom_mdss = {
 	.direct_mapping = true,
 };
 
+static const struct arm_smmu_client_match_data qcom_mss = {
+	.direct_mapping = true,
+};
+
 static const struct of_device_id qcom_smmu_client_of_match[] = {
 	{ .compatible = "qcom,adreno", .data = &qcom_adreno },
 	{ .compatible = "qcom,mdp4", .data = &qcom_mdss },
 	{ .compatible = "qcom,mdss", .data = &qcom_mdss },
 	{ .compatible = "qcom,sc7180-mdss", .data = &qcom_mdss },
+	{ .compatible = "qcom,sc7180-mss-pil", .data = &qcom_mss },
 	{ .compatible = "qcom,sdm845-mdss", .data = &qcom_mdss },
+	{ .compatible = "qcom,sdm845-mss-pil", .data = &qcom_mss },
 	{},
 };
 
-- 
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