[00/29] drm/i915: Improve BW management on MST links

Message

Imre Deak Oct. 24, 2023, 1:08 a.m. UTC

This is a new version of patches 12-24 in [1], with the following
changes/additions:

- Fix accounting for FEC/DSC BW overheads (patch 8, 10-12).
- Add a workaround for a Synpatics HBLANK expansion vs. DSC quirk
  (patch 6, 7, 20).
- Add support for enabling DSC for each MST stream, required by the
  above workaround (patch 5, 17-19, 21-26).
- Enable FEC early, once it's known DSC will need it (patch 9).
- Adding a patch from Stan, which fixes DSC issues and allows
  enabling it (patch 29).

[1] https://lore.kernel.org/all/[e-mail]

Cc: Stanislav Lisovskiy <[e-mail]>
Cc: Lyude Paul <[e-mail]>
Cc: Ville Syrjälä <[e-mail]>

Imre Deak (27):
  drm/dp_mst: Add helper to determine if an MST port is downstream of
    another port
  drm/dp_mst: Factor out a helper to check the atomic state of a
    topology manager
  drm/dp_mst: Swap the order of checking root vs. non-root port BW
    limitations
  drm/dp_mst: Allow DSC in any Synaptics last branch device
  drm/dp: Add DP_HBLANK_EXPANSION_CAPABLE and DSC_PASSTHROUGH_EN DPCD
    flags
  drm/dp_mst: Add HBLANK expansion quirk for Synaptics MST hubs
  drm/dp: Add helpers to calculate the link BW overhead
  drm/i915/dp_mst: Enable FEC early once it's known DSC is needed
  drm/i915/dp: Specify the FEC overhead as an increment vs. a remainder
  drm/i915/dp: Pass actual BW overhead to m_n calculation
  drm/i915/dp_mst: Account for FEC and DSC overhead during BW allocation
  drm/i915/dp_mst: Add atomic state for all streams on pre-tgl platforms
  drm/i915/dp_mst: Program the DSC PPS SDP for each stream
  drm/i915/dp: Make sure the DSC PPS SDP is disabled whenever DSC is
    disabled
  drm/i915/dp_mst: Add missing DSC compression disabling
  drm/i915/dp: Rename intel_ddi_disable_fec_state() to
    intel_ddi_disable_fec()
  drm/i915/dp: Wait for FEC detected status in the sink
  drm/i915/dp: Disable FEC ready flag in the sink
  drm/i915/dp_mst: Handle the Synaptics HBlank expansion quirk
  drm/i915/dp_mst: Enable decompression in the sink from the MST encoder
    hooks
  drm/i915/dp: Enable DSC via the connector decompression AUX
  drm/i915/dp_mst: Enable DSC passthrough
  drm/i915/dp_mst: Enable MST DSC decompression for all streams
  drm/i915: Factor out function to clear pipe update flags
  drm/i915/dp_mst: Force modeset CRTC if DSC toggling requires it
  drm/i915/dp_mst: Improve BW sharing between MST streams
  drm/i915/dp_mst: Check BW limitations only after all streams are
    computed

Stanislav Lisovskiy (1):
  drm/i915: Query compressed bpp properly using correct DPCD and DP Spec
    info

Ville Syrjälä (1):
  drm/dp_mst: Fix fractional DSC bpp handling

 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |   2 +-
 .../display/amdgpu_dm/amdgpu_dm_mst_types.c   |   2 +-
 drivers/gpu/drm/display/drm_dp_helper.c       | 115 ++++
 drivers/gpu/drm/display/drm_dp_mst_topology.c | 206 +++++--
 drivers/gpu/drm/i915/display/intel_ddi.c      | 131 ++++-
 drivers/gpu/drm/i915/display/intel_ddi.h      |   3 +
 drivers/gpu/drm/i915/display/intel_display.c  | 101 ++--
 drivers/gpu/drm/i915/display/intel_display.h  |   4 +-
 .../drm/i915/display/intel_display_types.h    |   3 +
 drivers/gpu/drm/i915/display/intel_dp.c       | 135 ++++-
 drivers/gpu/drm/i915/display/intel_dp.h       |  16 +-
 drivers/gpu/drm/i915/display/intel_dp_mst.c   | 554 +++++++++++++++---
 drivers/gpu/drm/i915/display/intel_dp_mst.h   |   5 +
 drivers/gpu/drm/i915/display/intel_fdi.c      |   5 +-
 drivers/gpu/drm/i915/display/intel_link_bw.c  |  16 +-
 drivers/gpu/drm/i915/display/intel_link_bw.h  |   1 +
 drivers/gpu/drm/nouveau/dispnv50/disp.c       |   3 +-
 .../gpu/drm/tests/drm_dp_mst_helper_test.c    |   6 +-
 include/drm/display/drm_dp.h                  |   2 +
 include/drm/display/drm_dp_helper.h           |  18 +
 include/drm/display/drm_dp_mst_helper.h       |   9 +-
 21 files changed, 1108 insertions(+), 229 deletions(-)