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| author | Dave Airlie <[email protected]> | 2020-02-07 02:22:23 +0000 |
|---|---|---|
| committer | Dave Airlie <[email protected]> | 2020-02-07 02:22:30 +0000 |
| commit | e139e8aed0d3a536b67446cb1755a61f52e8d4c9 (patch) | |
| tree | 610a395470daaa90e0220b20722210bc83791a13 /drivers/gpu/drm/tegra/gem.c | |
| parent | Merge branch 'ttm-prot-fix' of git://people.freedesktop.org/~thomash/linux in... (diff) | |
| parent | gpu: host1x: Set DMA direction only for DMA-mapped buffer objects (diff) | |
| download | kernel-e139e8aed0d3a536b67446cb1755a61f52e8d4c9.tar.gz kernel-e139e8aed0d3a536b67446cb1755a61f52e8d4c9.zip | |
Merge tag 'drm/tegra/for-5.6-rc1-fixes' of git://anongit.freedesktop.org/tegra/linux into drm-next
drm/tegra: Fixes for v5.6-rc1
These are a couple of quick fixes for regressions that were found during
the first two weeks of the merge window.
Signed-off-by: Dave Airlie <[email protected]>
From: Thierry Reding <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Diffstat (limited to 'drivers/gpu/drm/tegra/gem.c')
| -rw-r--r-- | drivers/gpu/drm/tegra/gem.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c index 1237df157e05..623768100c6a 100644 --- a/drivers/gpu/drm/tegra/gem.c +++ b/drivers/gpu/drm/tegra/gem.c @@ -60,8 +60,16 @@ static struct sg_table *tegra_bo_pin(struct device *dev, struct host1x_bo *bo, /* * If we've manually mapped the buffer object through the IOMMU, make * sure to return the IOVA address of our mapping. + * + * Similarly, for buffers that have been allocated by the DMA API the + * physical address can be used for devices that are not attached to + * an IOMMU. For these devices, callers must pass a valid pointer via + * the @phys argument. + * + * Imported buffers were also already mapped at import time, so the + * existing mapping can be reused. */ - if (phys && obj->mm) { + if (phys) { *phys = obj->iova; return NULL; } |