Various SI fixes, fix Radeon HD 7870 XT (v2)

["Timur Kristóf" <timur.kristof@gmail.com>]

This series fixes amdgpu to work on the Radeon HD 7870 XT
which has never worked with the Linux open source drivers before.

There are also various other fixes related to GART and UVD.

Changes in v2:
Consider CGTS_USER_TCC_DISABLE when reading disabled TCCs.
Dropped VCE related patches, will send those in a different series.

Timur Kristóf (4):
  drm/amdgpu/gmc: Fix AMDGPU_GART_PLACEMENT_LOW to not overlap with VRAM
  drm/amdgpu/uvd3.1: Don't validate the firmware when already validated
  Documentation/gpu: Add TCC, update TCP in amdgpu glossary
  drm/amdgpu/gfx6: Support harvested SI chips with disabled TCCs (v2)

 Documentation/gpu/amdgpu/amdgpu-glossary.rst |  9 ++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c      |  5 +-
 drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c        | 66 ++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/uvd_v3_1.c        | 10 +++
 4 files changed, 88 insertions(+), 2 deletions(-)

-- 
2.53.0