[PATCH i-g-t 0/5] tests/v3d_perfmon: Fix V3D 7.1 regression and extend perfmon testing

["Maíra Canal" <mcanal@igalia.com>]

This series extends the V3D perfmon coverage in two directions: it fixes
an existing test that regressed on V3D 7.1 (Raspberry Pi 5), and it adds
coverage for the new DRM_IOCTL_V3D_PERFMON_SET_GLOBAL ioctl plus companion
counter-isolation tests.

PATCH 1 fixes create-perfmon-invalid-counters, which currently fails on
V3D 7.1 because it hardcodes V3D_PERFCNT_NUM (only valid for V3D 4.2)
instead of querying DRM_V3D_PARAM_MAX_PERF_COUNTERS as the UAPI prescribes.

PATCHES 2-4 are the plumbing for the new tests:

  - sync the v3d UAPI header to expose DRM_IOCTL_V3D_PERFMON_SET_GLOBAL;
  - extend igt_v3d_perfmon_get_values() so callers can read counter values
		back into a caller-provided buffer;
  - add a small helper to query the V3D hardware version, since counter IDs
		and other details can differ between v4.2 and v7.1.

PATCH 5 improves the test coverage:

  - get-values-check-monotonically, which submits ten CL jobs in a row and
		asserts the counter values grow strictly between reads;
  - global-perfmon subtests covering input validation, single-perfmon
    semantics (EBUSY), implicit clear on perfmon destroy and on fd close,
		precedence over per-job perfmon (EAGAIN), and cross-fd accumulation;
  - perfmon-counter-isolation and perfmon-counter-isolation-subsequent-cl,
    which verify that the driver's queue serialization keeps pending CSD
    or earlier-CL work from leaking into a perfmon window.

Tested on Raspberry Pi 4 (V3D 4.2) and Raspberry Pi 5 (V3D 7.1).

Best regards,
- Maíra

Maíra Canal (5):
  tests/v3d_perfmon: Don't use the deprecated V3D_PERFCNT_NUM
  drm-uapi/v3d: Sync v3d UAPI
  lib/v3d: Allow callers to retrieve perfmon counter values
  lib/v3d: Add helper to query the V3D hardware version
  tests/v3d_perfmon: Add global perfmon and counter isolation tests

 include/drm-uapi/v3d_drm.h |  21 ++
 lib/igt_v3d.c              |  22 +-
 lib/igt_v3d.h              |   3 +-
 tests/v3d/v3d_perfmon.c    | 547 ++++++++++++++++++++++++++++++++++++-
 tests/v3d/v3d_submit_cl.c  |   4 +-
 tests/v3d/v3d_submit_csd.c |   4 +-
 6 files changed, 587 insertions(+), 14 deletions(-)

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2.54.0