[v2,00/12] Add DSC fractional bpp support

Message

Nautiyal, Ankit K Dec. 6, 2022, 10:46 a.m. UTC

This patch series adds support for having fractional compressed bpp
for MTL+. The initial patches that lay groundwork to iterate over valid
compressed bpps to select the 'best' compressed bpp with optimal link
configuration are taken from upstream pending 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.

Rev2:
-Added patch to fix DSC Receiver Cap size macro. (kernel test robot)
-Addressed review comments from Stan.

Ankit Nautiyal (9):
  drm/i915/dp: Check if force dsc bpc <= max requested bpc
  drm/display/dp: Fix the DP DSC Receiver cap size
  drm/display/dp: Add helper function to get DSC bpp prescision
  drm/i915/dp: Rename helpers to get DSC max pipe bpp and max 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/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       | 321 ++++++++++++++----
 drivers/gpu/drm/i915/display/intel_dp_mst.c   |   3 +-
 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 +
 15 files changed, 426 insertions(+), 84 deletions(-)