drm/etnaviv: indirect IOMMU restore through etnaviv MMU

So we can call the v2 restore code once it is there.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

drivers/gpu/drm/etnaviv/etnaviv_gpu.c

@@ -569,7 +569,7 @@ static void etnaviv_gpu_hw_init(struct etnaviv_gpu *gpu)
 	}
 
 	/* setup the MMU */
-	etnaviv_iommuv1_restore(gpu);
+	etnaviv_iommu_restore(gpu);
 
 	/* Start command processor */
 	prefetch = etnaviv_buffer_init(gpu);

drivers/gpu/drm/etnaviv/etnaviv_mmu.c

@@ -17,6 +17,7 @@
 #include "etnaviv_drv.h"
 #include "etnaviv_gem.h"
 #include "etnaviv_gpu.h"
+#include "etnaviv_iommu.h"
 #include "etnaviv_mmu.h"
 
 static int etnaviv_fault_handler(struct iommu_domain *iommu, struct device *dev,
@@ -281,6 +282,14 @@ struct etnaviv_iommu *etnaviv_iommu_new(struct etnaviv_gpu *gpu,
 	return mmu;
 }
 
+void etnaviv_iommu_restore(struct etnaviv_gpu *gpu)
+{
+	if (gpu->mmu->version == ETNAVIV_IOMMU_V1)
+		etnaviv_iommuv1_restore(gpu);
+	else
+		dev_err(gpu->dev, "IOMMUv2 restore not implemented\n");
+}
+
 size_t etnaviv_iommu_dump_size(struct etnaviv_iommu *iommu)
 {
 	struct etnaviv_iommu_ops *ops;

drivers/gpu/drm/etnaviv/etnaviv_mmu.h

@@ -67,5 +67,6 @@ void etnaviv_iommu_dump(struct etnaviv_iommu *iommu, void *buf);
 
 struct etnaviv_iommu *etnaviv_iommu_new(struct etnaviv_gpu *gpu,
 	struct iommu_domain *domain, enum etnaviv_iommu_version version);
+void etnaviv_iommu_restore(struct etnaviv_gpu *gpu);
 
 #endif /* __ETNAVIV_MMU_H__ */