Am 18.05.21 um 17:11 schrieb Thomas Hellström:
On 5/18/21 5:07 PM, Christian König wrote:
Am 18.05.21 um 16:55 schrieb Thomas Hellström:
From: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
This allows other drivers that may not setup the vma in the same way
to use the ttm bo helpers.
Uff can you please explain why exactly you need that?
Providing the BO is not much of a problem, but having the BO at
different VMA offsets is really a no-go with TTM.
Christian.
The current i915 uapi is using different offsets for different caching
:/. We're currently working around that by using ttm_bo_type_kernel
(no TTM vma offset at all) and i915's offset.
Can you instead adjust the offset in the mmap callback like we do for
dma-buf?
That's really a no-go what you describe here because it will mess up
reverse mapping lockup for buffer movement.
Christian.
/Thomas
