[PATCH v3 0/8] AuxCCS handling and render compression modifiers

[Tvrtko Ursulin]

A series to fix and add xe support for AuxCSS framebuffers via DPT.

Currently the auxiliary buffer data isn't mapped into the page tables at all so
cf48bddd31de ("drm/i915/display: Disable AuxCCS framebuffers if built for Xe")
had to disable the support.

On top of that there are missing flushes and invalidations both from the ring
buffer side and from the CPU side.

Tested with KDE Wayland, on Lenovo Carbon X1 ADL-P:

  [PLANE:32:plane 1A]: type=PRI
          uapi: [FB:242] AR30 little-endian (0x30335241),0x100000000000008,2880x1800, visible=visible, src=2880.000000x1800.000000+0.000000+0.000000, dst=2880x1800+0+0, rotation=0 (0x00000001)
          hw: [FB:242] AR30 little-endian (0x30335241),0x100000000000008,2880x1800, visible=yes, src=2880.000000x1800.000000+0.000000+0.000000, dst=2880x1800+0+0, rotation=0 (0x00000001)

Display seems working fine - no artefacts, no DMAR/PIPE faults. CI also appears
to be happy with v2.

v2:
 * More patches added to fix kms_flip_tiling.

v3:
 * Rebased after some cleanup patches from v2 were merged.
 * Added people to Cc as suggested by Rodrigo.
 * Adjusted last patch title. (Rodrigo)
 * Apply GGTT flushing only to iomapped system memory buffers.

Cc: José Roberto de Souza <jose.souza at intel.com>
Cc: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
Cc: Michael J. Ruhl <michael.j.ruhl at intel.com>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>

Tvrtko Ursulin (8):
  drm/xe: Add ring buffer handling for AuxCCS
  drm/xe: Use fb cached min alignment
  drm/xe: Reduce DPT table alignment as in i915
  drm/xe: Flush GGTT writes after populating DPT
  drm/xe: Handle DPT in system memory
  drm/xe: Force flush system memory AuxCCS framebuffers before scan out
  drm/xe/display: Add support for AuxCCS
  drm/i915/display: Expose AuxCCS frame buffer modifiers for Xe

 .../drm/i915/display/skl_universal_plane.c    |   6 -
 drivers/gpu/drm/xe/display/xe_fb_pin.c        | 181 ++++++++++++++----
 .../gpu/drm/xe/instructions/xe_gpu_commands.h |   1 +
 .../gpu/drm/xe/instructions/xe_mi_commands.h  |   6 +
 drivers/gpu/drm/xe/regs/xe_gt_regs.h          |   1 +
 drivers/gpu/drm/xe/xe_bo_types.h              |  14 +-
 drivers/gpu/drm/xe/xe_ring_ops.c              | 173 +++++++++--------
 drivers/gpu/drm/xe/xe_ring_ops_types.h        |   2 +-
 8 files changed, 261 insertions(+), 123 deletions(-)

-- 
2.48.0