The current settings leaves the DRM device's dma_ops field NULL, which
makes it use the dummy DMA ops on arm64 and return an error whenever we
try to import a buffer. Call of_dma_configure() with a NULL node (since
the device is not spawn from the device tree) so that
arch_setup_dma_ops() is called and sets the default ioswtlb DMA ops.
Signed-off-by: Alexandre Courbot <acour...@nvidia.com>
---
drivers/gpu/drm/tegra/drm.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index d347188bf8f4..bc0555adecaf 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -9,6 +9,7 @@
#include <linux/host1x.h>
#include <linux/iommu.h>
+#include <linux/of_device.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
@@ -990,6 +991,7 @@ static int host1x_drm_probe(struct host1x_device *dev)
return -ENOMEM;
dev_set_drvdata(&dev->dev, drm);
+ of_dma_configure(drm->dev, NULL);
err = drm_dev_register(drm, 0);
if (err < 0)
--
2.7.1
