[PATCH 15/18] drm/nouveau/tegra: Clean up IOMMU workaround

Robin Murphy
2020-08-20T15:11:22Z

Now that arch/arm is wired up for default domains and iommu-dma, we no
longer need to work around the arch-private mapping.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c | 13 -------------
1 file changed, 13 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
index d0d52c1d4aee..410ee1f83e0b 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
@@ -23,10 +23,6 @@
#ifdef CONFIG_NOUVEAU_PLATFORM_DRIVER
#include "priv.h"

-#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
-#include <asm/dma-iommu.h>
-#endif
-
static int
nvkm_device_tegra_power_up(struct nvkm_device_tegra *tdev)
{
@@ -109,15 +105,6 @@ nvkm_device_tegra_probe_iommu(struct nvkm_device_tegra *tdev)
unsigned long pgsize_bitmap;
int ret;

-#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
- if (dev->archdata.mapping) {
- struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(dev);
-
- arm_iommu_detach_device(dev);
- arm_iommu_release_mapping(mapping);
- }
-#endif
-
if (!tdev->func->iommu_bit)
return;

--
2.28.0.dirty