[RFC PATCH v2 0/3] Querying errors from drm_syncobj

[Yicong Hui <yiconghui@gmail.com>]

This patch series adds 2 new flags, DRM_SYNCOBJ_QUERY_FLAGS_ERROR and
DRM_SYNCOBJ_WAIT_FLAGS_ABORT_ON_ERROR for 3 ioctl operations
DRM_IOCTL_SYNCOBJ_QUERY, DRM_IOCTL_SYNCOBJ_WAIT and
DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT to allow them to batch-request error
codes from multiple syncobjs and abort early upon error of any of them.

Based on discussions from Michel Dänzer and Christian König, and a
starter task from the DRM todo documentation.

See https://gitlab.gnome.org/GNOME/mutter/-/issues/4624 for discussions
on userspace implementation.


---
Changes:
v2:
* Went from adding a new ioctl to implementing flags for existing ones.

v1: https://lore.kernel.org/all/20260213120836.81283-1-yiconghui@gmail.com/T/#mfdbc7f97e91ca5731b51b69c8cf8173cb0b2fb3e

Yicong Hui (3):
  drm/syncobj: Add flag DRM_SYNCOBJ_QUERY_FLAGS_ERROR to query errors
  drm/syncobj: Add DRM_SYNCOBJ_WAIT_FLAGS_ABORT_ON_ERROR ioctl flag
  drm/syncobj/doc: Remove starter task from todo list

 Documentation/gpu/todo.rst        | 16 ----------
 drivers/dma-buf/dma-fence-chain.c | 52 +++++++++++++++++++++++++++++++
 drivers/gpu/drm/drm_syncobj.c     | 46 ++++++++++++++++++++++++---
 include/linux/dma-fence-chain.h   |  1 +
 include/uapi/drm/drm.h            |  2 ++
 5 files changed, 96 insertions(+), 21 deletions(-)

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2.53.0