The CI Bug Log issue associated to this bug has been updated.

### New filters associated

* TGL: igt@gem_mmap_gtt@coherency - skip - Test requirement: is_coherent(fd), SKIP
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_366/fi-tgl-u/igt@gem_mmap_gtt@coherency.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_365/fi-tgl-u/igt@gem_mmap_gtt@coherency.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_363/fi-tgl-u/igt@gem_mmap_gtt@coherency.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14335/re-tgl-u/igt@gem_mmap_gtt@coherency.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_364/fi-tgl-u/igt@gem_mmap_gtt@coherency.html

Hah, inherited default from icl. I doubt they put any effort into fixing indirect GGTT coherency.

(In reply to Chris Wilson from comment #2)
> Hah, inherited default from icl. I doubt they put any effort into fixing
> indirect GGTT coherency.

Worth a trial, isn't it?

Re-opening for the GEM team to check if TGL is coherent or not.

A CI Bug Log filter associated to this bug has been updated:

{- TGL: igt@gem_mmap_gtt@coherency - skip - Test requirement: is_coherent(fd), SKIP -}
{+ TGL: igt@gem_mmap_gtt@coherency / igt@prime_vgem@coherency-gtt - skip - Test requirement: is_coherent(fd), SKIP +}

New failures caught by the filter:

  * https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_363/fi-tgl-u/igt@prime_vgem@coherency-gtt.html

Indirect GTT is still incoherent:

sudo ./tests/gem_mmap_gtt --run coherency
IGT-Version: 1.24-gaf353d57 (x86_64) (Linux: 5.3.0-CI-CI_DRM_6905+ x86_64)
Starting subtest: coherency
(gem_mmap_gtt:18848) CRITICAL: Test assertion failure function test_coherency, file i915/gem_mmap_gtt.c:520:
(gem_mmap_gtt:18848) CRITICAL: Failed assertion: cpu[x] == i
(gem_mmap_gtt:18848) CRITICAL: error: 0 != 64
Stack trace:
  #0 /home/testrunner/intel-gpu-tools/lib/igt_core.c:1674 __igt_fail_assert()
  #1 i915/gem_mmap_gtt.c:1138 __real_main1017()
  #2 [<unknown>+0x0]
Subtest coherency failed.