diff options
| author | Dave Airlie <airlied@redhat.com> | 2022-11-19 06:15:20 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2022-11-19 06:15:37 +1000 |
| commit | b1010b93fe9074f965ebf86e0e382a8a7a71500d (patch) | |
| tree | e663a432b9968286c7b682bb60b0ed30271e7d24 /drivers | |
| parent | 585f2bc8fe692d31593633df99090a1039e789bb (diff) | |
| parent | c2418f911a31a266af4fbaca998dc73d3676475a (diff) | |
Merge tag 'drm/tegra/for-6.1-rc6' of https://gitlab.freedesktop.org/drm/tegra into drm-fixes
drm/tegra: Fixes for v6.1-rc6
This contains a single fix that avoids using the GART on Tegra20 because
it doesn't work well with the way the Tegra DRM driver tries to use it.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thierry Reding <thierry.reding@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221118121614.3511110-1-thierry.reding@gmail.com
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/tegra/drm.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/host1x/dev.c | 4 |
2 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c index 6748ec1e0005..a1f909dac89a 100644 --- a/drivers/gpu/drm/tegra/drm.c +++ b/drivers/gpu/drm/tegra/drm.c @@ -1093,6 +1093,10 @@ static bool host1x_drm_wants_iommu(struct host1x_device *dev) struct host1x *host1x = dev_get_drvdata(dev->dev.parent); struct iommu_domain *domain; + /* Our IOMMU usage policy doesn't currently play well with GART */ + if (of_machine_is_compatible("nvidia,tegra20")) + return false; + /* * If the Tegra DRM clients are backed by an IOMMU, push buffers are * likely to be allocated beyond the 32-bit boundary if sufficient diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c index 0cd3f97e7e49..f60ea24db0ec 100644 --- a/drivers/gpu/host1x/dev.c +++ b/drivers/gpu/host1x/dev.c @@ -292,6 +292,10 @@ static void host1x_setup_virtualization_tables(struct host1x *host) static bool host1x_wants_iommu(struct host1x *host1x) { + /* Our IOMMU usage policy doesn't currently play well with GART */ + if (of_machine_is_compatible("nvidia,tegra20")) + return false; + /* * If we support addressing a maximum of 32 bits of physical memory * and if the host1x firewall is enabled, there's no need to enable |