Tegra DRM and Host1x don't work properly when CONFIG_ARM_DMA_USE_IOMMU=y, i.e. in case of multiplatform ARM32 kernel. The simple workaround is to detach devices from the offending IOMMU domain. This is a resend of 9 months old patches which we lost and forgotten. The problem still persists. I rebased patches on top of recent linux-next and improved commit messages. Dmitry Osipenko (2): gpu: host1x: Add back arm_iommu_detach_device() drm/tegra: Add back arm_iommu_detach_device() drivers/gpu/drm/tegra/drm.c | 15 +++++++++++++++ drivers/gpu/host1x/dev.c | 15 +++++++++++++++ 2 files changed, 30 insertions(+) -- 2.33.1
