diff mbox series

[RFC,v1,5/6] drm/nouveau: tegra: Universally avoid implicit DMA backing with IOMMU

Message ID 20180726231624.21084-6-digetx@gmail.com (mailing list archive)
State New, archived
Headers show
Series Resolve unwanted DMA backing with IOMMU | expand

Commit Message

Dmitry Osipenko July 26, 2018, 11:16 p.m. UTC 
Implicit backing DMA with IOMMU breaks Nouveau on Tegra, the current
approach with detaching device from IOMMU that was added in commit
b59fb482b522 ("drm/nouveau: tegra: Detach from ARM DMA/IOMMU mapping")
works only for arm32 which has the CONFIG_ARM_DMA_USE_IOMMU, but not for
arm64 which doesn't have that config option. Drivers core now allows to
avoid the implicit backing, that is a universal solution unlike the
current variant with the detaching.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 drivers/gpu/drm/nouveau/nouveau_platform.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/nouveau/nouveau_platform.c b/drivers/gpu/drm/nouveau/nouveau_platform.c
index 039e23548e08..0b57f4f9b638 100644
--- a/drivers/gpu/drm/nouveau/nouveau_platform.c
+++ b/drivers/gpu/drm/nouveau/nouveau_platform.c
@@ -90,6 +90,7 @@  MODULE_DEVICE_TABLE(of, nouveau_platform_match);
 struct platform_driver nouveau_platform_driver = {
 	.driver = {
 		.name = "nouveau",
+		.no_implicit_iommu = true,
 		.of_match_table = of_match_ptr(nouveau_platform_match),
 	},
 	.probe = nouveau_platform_probe,