[00/16] Add DSC fractional bpp support

Message

Nautiyal, Ankit K Jan. 20, 2023, 4:38 a.m. UTC

This patch series adds support for DSC fractional compressed bpp
for MTL+. The series starts with some fixes, followed by patches that
lay groundwork to iterate over valid compressed bpps to select the
'best' compressed bpp with optimal link configuration (taken from
upstream series: https://patchwork.freedesktop.org/series/105200/).

The later patches, add changes to accommodate compressed bpp with
fractional part, including changes to QP calculations.
To get the 'best' compressed bpp, we iterate over the valid compressed
bpp values, but with fractional step size 1/16, 1/8, 1/4 or 1/2 as per
sink support.

The last 2 patches add support to depict DSC sink's fractional support,
and debugfs to enforce use of fractional bpp, while choosing an
appropriate compressed bpp.


Ankit Nautiyal (13):
  drm/i915/dp: Remove extra logs for printing DSC info
  drm/i915/dp: Avoid forcing DSC BPC for MST case
  drm/i915/dp: Do not check for min DSC BPC for MST case
  drm/i915/dp: Check if dsc forced bpc is in allowed limits
  drm/i915/dp: Avoid left shift of DSC output bpp by 4
  drm/i915/dp: Rename helpers to get DSC max pipe_bpp/output_bpp
  drm/i915/dp: Get optimal link config to have best compressed bpp
  drm/i915/display: Store compressed bpp in U6.4 format
  drm/i915/display: Consider fractional vdsc bpp while computing m_n
    values
  drm/i915/audio : Consider fractional vdsc bpp while computing tu_data
  drm/display/dp: Fix the DP DSC Receiver cap size
  drm/display/dp: Add helper function to get DSC bpp prescision
  drm/i915/dp: Iterate over output bpp with fractional step size

Swati Sharma (2):
  drm/i915/dsc: Add debugfs entry to validate DSC fractional bpp
  drm/i915/dsc: Allow DSC only with fractional bpp when forced from
    debugfs

Vandita Kulkarni (1):
  drm/i915/dsc/mtl: Add support for fractional bpp

 drivers/gpu/drm/display/drm_dp_helper.c       |  27 ++
 drivers/gpu/drm/i915/display/icl_dsi.c        |  10 +-
 drivers/gpu/drm/i915/display/intel_audio.c    |  14 +-
 drivers/gpu/drm/i915/display/intel_bios.c     |   2 +-
 drivers/gpu/drm/i915/display/intel_display.c  |   6 +-
 drivers/gpu/drm/i915/display/intel_display.h  |   2 +-
 .../drm/i915/display/intel_display_debugfs.c  |  84 ++++
 .../drm/i915/display/intel_display_types.h    |  17 +-
 drivers/gpu/drm/i915/display/intel_dp.c       | 389 ++++++++++++++----
 drivers/gpu/drm/i915/display/intel_dp.h       |  14 +-
 drivers/gpu/drm/i915/display/intel_dp_mst.c   |  30 +-
 drivers/gpu/drm/i915/display/intel_fdi.c      |   2 +-
 .../gpu/drm/i915/display/intel_qp_tables.c    |   3 -
 drivers/gpu/drm/i915/display/intel_vdsc.c     |  16 +-
 include/drm/display/drm_dp.h                  |   2 +-
 include/drm/display/drm_dp_helper.h           |   1 +
 16 files changed, 487 insertions(+), 132 deletions(-)