diff options
| author | Ben Crocker <bcrocker@redhat.com> | 2018-02-22 17:52:19 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-02-22 23:35:54 -0500 |
| commit | 2c83029cda55a5e7665c7c6326909427d6a01350 (patch) | |
| tree | bc8c5e304ee46a72f0af3075ecd84ce244284cd0 /drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | |
| parent | 4909c6de7d7ada493e1c2f0d8bf0145a750d2dd6 (diff) | |
drm/radeon: insist on 32-bit DMA for Cedar on PPC64/PPC64LE
In radeon_device_init, set the need_dma32 flag for Cedar chips
(e.g. FirePro 2270). This fixes, or at least works around, a bug
on PowerPC exposed by last year's commits
8e3f1b1d8255105f31556aacf8aeb6071b00d469 (Russell Currey)
and
253fd51e2f533552ae35a0c661705da6c4842c1b (Alistair Popple)
which enabled the 64-bit DMA iommu bypass.
This caused the device to freeze, in some cases unrecoverably, and is
the subject of several bug reports internal to Red Hat.
Signed-off-by: Ben Crocker <bcrocker@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h')
0 files changed, 0 insertions, 0 deletions