drm/amd/display: Add IN_FORMATS_ASYNC support for planes

[Why]
The DRM core exposes an IN_FORMATS_ASYNC plane property describing the
set of format/modifier pairs that are valid for asynchronous (immediate)
page flips. amdgpu already advertises async page flip support via
mode_config.async_page_flip = true, but never implemented the
.format_mod_supported_async plane callback, so the IN_FORMATS_ASYNC
property was not created.

This inconsistency (advertising async flips while exposing IN_FORMATS but
no IN_FORMATS_ASYNC) causes userspace, such as igt-gpu-tools, to emit a
repeated warning during plane initialization, which in turn demotes many
otherwise passing KMS subtests to a WARN result.

[How]
Wire up .format_mod_supported_async to the existing
amdgpu_dm_plane_format_mod_supported callback so the async format list is
populated. amdgpu does not restrict async flips at the format/modifier
level: the async flip constraints are enforced at atomic check and commit
time and only require a fast update (no change to FB pitch, DCC state,
rotation or memory type) between the old and new buffers. Therefore the
set of formats/modifiers valid for async flips is identical to the
regular IN_FORMATS set, and the same callback can be reused.

Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: James Lin <PingLei.Lin@amd.com>
Signed-off-by: Ivan Lipski <ivan.lipski@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 8e2d7bbd6b184c0c1b0fe7cb404c9b5214d89931)

0 files changed, 0 insertions, 0 deletions