[0/9] Add DSC fractional bpp support

Message

Ankit Nautiyal Aug. 22, 2023, 12:10 p.m. UTC

This patch series adds support for DSC fractional compressed bpp
for MTL+.

First fix patch is taken from :
https://patchwork.freedesktop.org/series/122613/
Adding here to to avoid issues while reading fractional bpp support.
The new few 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 (6):
  drm/display/dp: Fix the DP DSC Receiver cap size
  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: 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  | 82 +++++++++++++++++++
 .../drm/i915/display/intel_display_types.h    | 17 +++-
 drivers/gpu/drm/i915/display/intel_dp.c       | 68 +++++++++------
 drivers/gpu/drm/i915/display/intel_dp_mst.c   |  6 +-
 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     | 27 ++++--
 include/drm/display/drm_dp.h                  |  2 +-
 include/drm/display/drm_dp_helper.h           |  1 +
 15 files changed, 216 insertions(+), 53 deletions(-)