[Intel-gfx] [PATCH 0/8] Add DSC fractional bpp support

[Imre Deak]

On Wed, Sep 13, 2023 at 11:35:58AM +0530, Mitul Golani wrote:
> his 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.

MST/DSC is at the moment broken, so I'd prefer merging this patchset
only after it's fixed. This would mean merging 

https://lore.kernel.org/all/20230921195159.2646027-1-imre.deak@intel.com

first, followed by the DSC parts from

https://lore.kernel.org/all/20230914192659.757475-1-imre.deak@intel.com

which would also need a rebase for this patchset.

> Ankit Nautiyal (5):
>   drm/display/dp: Add helper function to get DSC bpp prescision
>   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        | 11 +--
>  drivers/gpu/drm/i915/display/intel_audio.c    | 17 ++--
>  drivers/gpu/drm/i915/display/intel_bios.c     |  6 +-
>  drivers/gpu/drm/i915/display/intel_cdclk.c    |  6 +-
>  drivers/gpu/drm/i915/display/intel_display.c  |  8 +-
>  drivers/gpu/drm/i915/display/intel_display.h  |  2 +-
>  .../drm/i915/display/intel_display_debugfs.c  | 83 +++++++++++++++++++
>  .../drm/i915/display/intel_display_types.h    |  4 +-
>  drivers/gpu/drm/i915/display/intel_dp.c       | 81 +++++++++++-------
>  drivers/gpu/drm/i915/display/intel_dp_mst.c   | 32 ++++---
>  drivers/gpu/drm/i915/display/intel_fdi.c      |  2 +-
>  .../i915/display/intel_fractional_helper.h    | 36 ++++++++
>  .../gpu/drm/i915/display/intel_qp_tables.c    |  3 -
>  drivers/gpu/drm/i915/display/intel_vdsc.c     | 30 +++++--
>  include/drm/display/drm_dp_helper.h           |  1 +
>  16 files changed, 275 insertions(+), 74 deletions(-)
>  create mode 100644 drivers/gpu/drm/i915/display/intel_fractional_helper.h
> 
> -- 
> 2.25.1
>