[RFC PATCH v5 00/32] IGT tests for the KMS Color Pipeline API

[Harry Wentland]

This series introduces support for
* drm_colorop DRM objects
* COLOR_PIPELINE plane property

Kernel changes:
https://gitlab.freedesktop.org/hwentland/linux/-/merge_requests/5

It also adds a new kms_colorop test case that tests the color pipeline
API. The tests are designed to be easily extensible with a "transform"
and "compare" function pointer for each test. The "transform" function
performs the transformations under test via SW routines. The "compare"
function compares the DRM/KMS result (via a writeback connector) with
the result derived via the SW "transform".

This series introduces a number of tests for pre-defined transfer
functions, custom LUTs, 3x4 CTMs, and a multiplier, as well as a bypass
test.

It tests 8-bit and 10-bit RGB surface formats, depending on support
by the driver, both on the drm_plane end as well as the writeback
drm_connector end.

Bhanuprakash sent an Intel series as a v4. This v5 does not incorporate
his patches yet as resolving that will require a bit more time.

v5:
 - Bypass test
 - 10 bpc support
 - Proper setup and cleanup
 - PQ/BT2020 TFs
 - 1D LUT tests
 - Multiplier tests

v4:
 - Intel color pipeline work, to be combined with v5 in a future iteration.

v3:
 - Remove need for IOCTLs and libdrm changes
 - Test colorop properties with both atomic and legacy code paths
 - move enum drm_colorop_type to drm_mode.h
 - Add descriptions for public functions in lib (Kamil)
 - Use SPDX style license identifier (Kamil)
 - Replace Skia license comment with copyright note in file header
 - Fix kms_colorop subtests if applicable color pipeline not found

Alex Hung (5):
  lib/igt_kms: increase MAX_NUM_COLOROPS to 128
  tests/kms_colorop: Add a sRGB test for EOTF -> Inverse EOTF -> EOTF
  lib/igt_color: Add 1D LUT color transformation support
  test/kms_colorop: Add tests that exercise the 1D LUT colorops
  tests/kms_colorop: Add multiplier tests

Harry Wentland (27):
  lib/drmtest: Add is_vkms_device()
  tests/kms_writeback: Fix kms_writeback for VKMS
  lib/igt_kms: Move get_writeback_formats_blob to lib
  lib/igt_kms: Introduce DRM_CLIENT_CAP_PLANE_COLOR_PIPELINE
  include/drm-uapi: Add COLOROP object
  drm-uapi: Add 3x4 CTM
  drm-uapi: Add 1D LUT drm_colorop_type
  lib/igt_kms: Introduce drm_colorop and COLOR_PIPELINE
  tests/kms_properties: Add colorop properties test
  igt/color: Add SW color transform functionality
  lib/igt_fb: Add copy_fb function
  tests/kms_colorop: Add kms_colorop tests
  lib/igt_kms: Add support for DATA colorop property
  lib/igt_color: Add support for 3x4 matrices
  tests/kms_colorop: Add 3x4 CTM tests
  tests/kms_colorop: Add bypass test
  tests/kms_colorop: Parametrize the buffer format
  tests/kms_colorop: Add 10bpc test and skip if format not supported
  tests/kms_colorop: Skip if writeback does not support fourcc
  lib/igt_fb: Allow any non-planar format for igt_copy_fb
  kms/colorop: Do proper setup and cleanup
  lib/igt_color: Support color transform for XRGB2101010
  tests/kms_colorop: Set wide [13, 13] bracket for comparison on amdgpu
  lib/igt_color: Add PQ variants for 0-1 and 0-125 range
  tests/kms_colorop: Add tests for PQ variants
  lib/igt_color: add BT2020/BT709 transfer functions
  tests/kms_colorop: Add tests for BT2020/BT709 TFs

 include/drm-uapi/drm.h      |  15 +
 include/drm-uapi/drm_mode.h |  24 ++
 lib/drmtest.c               |   5 +
 lib/drmtest.h               |   1 +
 lib/igt_color.c             | 460 +++++++++++++++++++++++++
 lib/igt_color.h             | 153 +++++++++
 lib/igt_fb.c                |  36 +-
 lib/igt_fb.h                |   3 +
 lib/igt_kms.c               | 327 +++++++++++++++++-
 lib/igt_kms.h               |  98 ++++++
 lib/meson.build             |   1 +
 tests/kms_colorop.c         | 662 ++++++++++++++++++++++++++++++++++++
 tests/kms_colorop.h         | 242 +++++++++++++
 tests/kms_properties.c      |  76 +++++
 tests/kms_writeback.c       |  56 ++-
 tests/meson.build           |   1 +
 16 files changed, 2116 insertions(+), 44 deletions(-)
 create mode 100644 lib/igt_color.c
 create mode 100644 lib/igt_color.h
 create mode 100644 tests/kms_colorop.c
 create mode 100644 tests/kms_colorop.h

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2.44.0