04.02.2020 16:59, Thierry Reding пишет: > From: Thierry Reding <treding@xxxxxxxxxx> > > Older Tegra devices only allow addressing 32 bits of memory, so whether > or not the host1x is attached to an IOMMU doesn't matter. host1x IOMMU > attachment is only needed on devices that can address memory beyond the > 32-bit boundary and where the host1x doesn't support the wide GATHER > opcode that allows it to access buffers at higher addresses. > > Signed-off-by: Thierry Reding <treding@xxxxxxxxxx> > --- > drivers/gpu/drm/tegra/drm.c | 49 ++++++++++++++++++++++++------------- > 1 file changed, 32 insertions(+), 17 deletions(-) Tested-by: Dmitry Osipenko <digetx@xxxxxxxxx>
