[PATCH v3 0/6] Add support for atomic async page-flips

[Simon Ser <contact@emersion.fr>]

This series adds support for DRM_MODE_PAGE_FLIP_ASYNC for atomic
commits, aka. "immediate flip" (which might result in tearing).
The feature was only available via the legacy uAPI, however for
gaming use-cases it may be desirable to enable it via the atomic
uAPI too.

- Patchwork: https://patchwork.freedesktop.org/series/107683/
- User-space patch: https://github.com/Plagman/gamescope/pull/595
- IGT patch: https://patchwork.freedesktop.org/series/107681/

Main changes in v2: add docs, fail atomic commit if async flip isn't
possible.

Changes in v3: add a note in the documentation about Intel hardware,
add R-b tags.

Tested on an AMD Picasso iGPU (Simon) and an AMD Vangogh GPU (André).

Simon Ser (6):
  drm: document DRM_MODE_PAGE_FLIP_ASYNC
  amd/display: only accept async flips for fast updates
  drm: introduce drm_mode_config.atomic_async_page_flip_not_supported
  drm: allow DRM_MODE_PAGE_FLIP_ASYNC for atomic commits
  drm: introduce DRM_CAP_ATOMIC_ASYNC_PAGE_FLIP
  amd/display: indicate support for atomic async page-flips on DC

 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |  8 ++++++
 .../amd/display/amdgpu_dm/amdgpu_dm_crtc.c    | 10 +++++++
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c  |  1 +
 drivers/gpu/drm/drm_atomic_uapi.c             | 28 +++++++++++++++++--
 drivers/gpu/drm/drm_ioctl.c                   |  5 ++++
 drivers/gpu/drm/i915/display/intel_display.c  |  1 +
 drivers/gpu/drm/nouveau/nouveau_display.c     |  1 +
 drivers/gpu/drm/vc4/vc4_kms.c                 |  1 +
 include/drm/drm_mode_config.h                 | 11 ++++++++
 include/uapi/drm/drm.h                        | 10 ++++++-
 include/uapi/drm/drm_mode.h                   | 16 +++++++++++
 11 files changed, 88 insertions(+), 4 deletions(-)

-- 
2.37.3