[PATCH v2 0/2] drm/mediatek: make imported PRIME buffers contiguous

Alexandre Courbot
2019-07-29T05:34:03Z

The default DMA segment size was used when importing PRIME buffers,
which resulted in a chance of them not being contiguous in the virtual
IO space of the device and mtk_gem_prime_import_sg_table() complaining
that the SG table was not contiguous as it expects.

This series fixes this issue by

1) Using the correct DMA device when importing PRIME buffers,
2) Setting a more suitable DMA segment size on the DMA device than the
default 64KB.

Changes since v1:
- Split into two patches,
- Fixed an error path that would have returned 0.

Alexandre Courbot (2):
drm/mediatek: use correct device to import PRIME buffers
drm/mediatek: set DMA max segment size

drivers/gpu/drm/mediatek/mtk_drm_drv.c | 49 ++++++++++++++++++++++++--
drivers/gpu/drm/mediatek/mtk_drm_drv.h | 2 ++
2 files changed, 48 insertions(+), 3 deletions(-)