[Intel-gfx] [PATCH v4 00/30] drm/i915: Improve BW management on MST links

[Imre Deak]

This is v4 of [1] with the following changes:

- Fix a race condition between connector setup and registration
  (added patch 1).
- Rename DRM_DP_OVERHEAD_SSC to DRM_DP_OVERHEAD_SSC_REF_CLK
  (Ville, patch 9).
- Fix setting crtc_state->fec_enable, once crtc_state->port_clock
  required for it is already set (patch 10).
- Fix passing the correct fec_enable parameter to
  intel_dp_bw_fec_overhead() (patch 12).
- Fix TU size, making it match the payload size in the payload table
  (Patch 13).
- Apply the HBLANK expansion quirk whenever the HBLANK period is
  300ns or less (Patch 21).
- Fix refcounting of the DSC AUX decompression device
  (Stan, patch 25).
- Fix HW readout/sanitize for the connector DSC decompression enabled
  state (patch 25).
- Move intel_crtc_needs_modeset() check to callers of
  clear_pipe_update_flags_on_modeset_crtc() (Ville, patch 26).
- Fix forcing modeset on CRTC due to a change in MST topology
  (Ville, patch 27).
- Add missing DocBooks, fix typos.

[1] https://lore.kernel.org/all/20231024010925.3949910-1-imre.deak@intel.com

Cc: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
Cc: Lyude Paul <lyude at redhat.com>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
Cc: Arun R Murthy <arun.r.murthy at intel.com>

Imre Deak (28):
  drm/i915/dp_mst: Fix race between connector registration and setup
  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       | 134 +++++
 drivers/gpu/drm/display/drm_dp_mst_topology.c | 206 +++++--
 drivers/gpu/drm/i915/display/intel_ddi.c      | 136 ++++-
 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       | 256 +++++++-
 drivers/gpu/drm/i915/display/intel_dp.h       |  23 +-
 drivers/gpu/drm/i915/display/intel_dp_mst.c   | 564 +++++++++++++++---
 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 +
 .../drm/i915/display/intel_modeset_setup.c    |   6 +
 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 +-
 22 files changed, 1270 insertions(+), 235 deletions(-)

-- 
2.39.2