[pull] drm: dma-fence-deadline-core for v6.4

[Tvrtko Ursulin]

On 28/03/2023 18:19, Daniel Vetter wrote:
> On Sat, Mar 25, 2023 at 11:24:56AM -0700, Rob Clark wrote:
>> Hi Dave and Daniel,
>>
>> Here is the series for dma-fence deadline hint, without driver
>> specific patches, with the intent that it can be merged into drm-next
>> as well as -driver next trees to enable landing driver specific
>> support through their corresponding -next trees.
>>
>> The following changes since commit eeac8ede17557680855031c6f305ece2378af326:
>>
>>    Linux 6.3-rc2 (2023-03-12 16:36:44 -0700)
>>
>> are available in the Git repository at:
>>
>>    https://gitlab.freedesktop.org/drm/msm.git tags/dma-fence-deadline-core
>>
>> for you to fetch changes up to 0bcc8f52a8d9d1f9cd5af7f88c6599a89e64284a:
>>
>>    drm/atomic-helper: Set fence deadline for vblank (2023-03-25 10:55:08 -0700)
> 
> Ok apparently there's only igts for the sync_file uabi and the only only
> userspace for syncobj is the mesa mr that is still under discussion :-/
> 
> Yes I know there's a clearly established need for something like this, but
> also in drm we don't merge conjectured uabi. Especially with tricky stuff
> that's meant to improve best effort performance/tuning problems, where you
> really have to benchmark the entire thing and make sure you didn't screw
> up some interaction.

Would we consider bypassing any ABI concerns by going with my proposal* 
for the wait boost specific case?

Regards,

Tvrtko

*) https://patchwork.freedesktop.org/series/113846/


> 
> To make sure this isn't stuck another full cycle, is there a way to wittle
> this just down to the kms atomic flip boosting parts? That way we could at
> least start landing the core&driver bits ...
> -Daniel
> 
>>
>> ----------------------------------------------------------------
>> Immutable branch with dma-fence deadline hint support between drm-next
>> and driver -next trees.
>>
>> ----------------------------------------------------------------
>> Rob Clark (11):
>>        dma-buf/dma-fence: Add deadline awareness
>>        dma-buf/fence-array: Add fence deadline support
>>        dma-buf/fence-chain: Add fence deadline support
>>        dma-buf/dma-resv: Add a way to set fence deadline
>>        dma-buf/sync_file: Surface sync-file uABI
>>        dma-buf/sync_file: Add SET_DEADLINE ioctl
>>        dma-buf/sw_sync: Add fence deadline support
>>        drm/scheduler: Add fence deadline support
>>        drm/syncobj: Add deadline support for syncobj waits
>>        drm/vblank: Add helper to get next vblank time
>>        drm/atomic-helper: Set fence deadline for vblank
>>
>>   Documentation/driver-api/dma-buf.rst    | 16 ++++++-
>>   drivers/dma-buf/dma-fence-array.c       | 11 +++++
>>   drivers/dma-buf/dma-fence-chain.c       | 12 +++++
>>   drivers/dma-buf/dma-fence.c             | 60 ++++++++++++++++++++++++
>>   drivers/dma-buf/dma-resv.c              | 22 +++++++++
>>   drivers/dma-buf/sw_sync.c               | 81 +++++++++++++++++++++++++++++++++
>>   drivers/dma-buf/sync_debug.h            |  2 +
>>   drivers/dma-buf/sync_file.c             | 19 ++++++++
>>   drivers/gpu/drm/drm_atomic_helper.c     | 37 +++++++++++++++
>>   drivers/gpu/drm/drm_syncobj.c           | 64 ++++++++++++++++++++------
>>   drivers/gpu/drm/drm_vblank.c            | 53 +++++++++++++++++----
>>   drivers/gpu/drm/scheduler/sched_fence.c | 46 +++++++++++++++++++
>>   drivers/gpu/drm/scheduler/sched_main.c  |  2 +-
>>   include/drm/drm_vblank.h                |  1 +
>>   include/drm/gpu_scheduler.h             | 17 +++++++
>>   include/linux/dma-fence.h               | 22 +++++++++
>>   include/linux/dma-resv.h                |  2 +
>>   include/uapi/drm/drm.h                  | 17 +++++++
>>   include/uapi/linux/sync_file.h          | 59 +++++++++++++++---------
>>   19 files changed, 496 insertions(+), 47 deletions(-)
>