[PATCH v2 0/7] vc4: Convert to drm_atomic_helper_commit

[Maxime Ripard]

Hi,

Here's a conversion of vc4 to remove the hand-rolled atomic_commit helper from
vc4 in favour of the generic one.

This requires some rework of vc4, but also a new hook and some documentation
for corner-cases in the DRM core that have been reported and explained by
Daniel recently.

Let me know what you think,
Maxime

Changes from v1:
  - Addressed the comments from Dave and Thomas on the documentation
  - s/last_user/pending_commit/
  - Check that the commit is not NULL before waiting on it
  - Fixed a compilation error on an intermediate patch
  - Drop the assigned_channels variable redundant with the in_use variable

Maxime Ripard (7):
  drm: Introduce an atomic_commit_setup function
  drm: Document use-after-free gotcha with private objects
  drm/vc4: Simplify a bit the global atomic_check
  drm/vc4: kms: Wait on previous FIFO users before a commit
  drm/vc4: kms: Remove unassigned_channels from the HVS state
  drm/vc4: kms: Remove async modeset semaphore
  drm/vc4: kms: Convert to atomic helpers

 drivers/gpu/drm/drm_atomic_helper.c      |   9 +
 drivers/gpu/drm/vc4/vc4_crtc.c           |  13 --
 drivers/gpu/drm/vc4/vc4_drv.h            |   2 -
 drivers/gpu/drm/vc4/vc4_kms.c            | 248 +++++++++++------------
 include/drm/drm_atomic.h                 |  20 ++
 include/drm/drm_modeset_helper_vtables.h |  21 ++
 6 files changed, 172 insertions(+), 141 deletions(-)

-- 
2.28.0