[PATCH v2 2/2] iommu/arm-smmu-qcom: Skip PRR setup on SM7250 GPU SMMU

[Ishu Brar via B4 Relay]

From: Ishu Brar <patches at brar.si>

As on SM8250, the firmware on SM7250 resets the device when the Adreno
SMMU PRR registers are written. This happened as soon as the first
per-process GPU pagetable was created. Do not install the PRR
callbacks for the SM7250 GPU SMMU either.

Tested on a OnePlus Nord (SM7250) with Vulkan.

Signed-off-by: Ishu Brar <patches at brar.si>
---
 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 795e8ec7e..55071eb03 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -394,6 +394,7 @@ static int qcom_adreno_smmu_init_context(struct arm_smmu_domain *smmu_domain,
 	priv->set_prr_addr = NULL;
 
 	if (of_device_is_compatible(np, "qcom,smmu-500") &&
+	    !of_device_is_compatible(np, "qcom,sm7250-smmu-500") &&
 	    !of_device_is_compatible(np, "qcom,sm8250-smmu-500") &&
 	    of_device_is_compatible(np, "qcom,adreno-smmu")) {
 		priv->set_prr_bit = qcom_adreno_smmu_set_prr_bit;

-- 
2.56.0