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| author | Geert Uytterhoeven <[email protected]> | 2017-02-13 11:00:26 +0000 |
|---|---|---|
| committer | Vinod Koul <[email protected]> | 2017-02-14 07:53:02 +0000 |
| commit | dc312349e87526dfe6387c1a82fafded706f0572 (patch) | |
| tree | 47bdb8a763db24ffa0007782098e7591c745db1e /drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | |
| parent | dmaengine: sun6i: allow build on ARM64 platforms (sun50i) (diff) | |
| download | kernel-dc312349e87526dfe6387c1a82fafded706f0572.tar.gz kernel-dc312349e87526dfe6387c1a82fafded706f0572.zip | |
dmaengine: rcar-dmac: Widen DMA mask to 40 bits
By default, the DMA mask covers only the low 32-bit address space, which
causes SWIOTLB on arm64 to fall back to a bounce buffer for DMA
transfers involving memory outside the 32-bit address space.
The R-Car DMA controller hardware supports a 40-bit address space, hence
widen the DMA mask to 40 bits to actually make use of this feature.
Signed-off-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c')
0 files changed, 0 insertions, 0 deletions