[Intel-gfx] [PATCH 00/11] Add DSC fractional bpp support

[Nautiyal, Ankit K]

On 11/10/2023 3:40 PM, Ankit Nautiyal wrote:
> 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.
>
> Rev10: Rebased and added DSC Fractional support for DP MST.

Pushed patches 1-8 to drm-intel-next, thanks for the reviews, acks.

Regards,

Ankit


>
> Ankit Nautiyal (8):
>    drm/display/dp: Add helper function to get DSC bpp precision
>    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
>    drm/i915/dp_mst: Use precision of 1/16 for computing bpp
>    drm/i916/dp_mst: Iterate over the DSC bpps as per DSC precision
>      support
>    drm/i915/dp_mst: Add support for forcing dsc fractional bpp via
>      debugfs
>
> 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    | 16 ++--
>   drivers/gpu/drm/i915/display/intel_bios.c     |  4 +-
>   drivers/gpu/drm/i915/display/intel_cdclk.c    |  5 +-
>   drivers/gpu/drm/i915/display/intel_display.c  |  6 +-
>   .../drm/i915/display/intel_display_debugfs.c  | 84 ++++++++++++++++++
>   .../drm/i915/display/intel_display_types.h    |  4 +-
>   drivers/gpu/drm/i915/display/intel_dp.c       | 87 +++++++++++--------
>   drivers/gpu/drm/i915/display/intel_dp_mst.c   | 85 +++++++++++-------
>   drivers/gpu/drm/i915/display/intel_fdi.c      |  3 +-
>   drivers/gpu/drm/i915/display/intel_link_bw.c  |  2 +-
>   .../gpu/drm/i915/display/intel_qp_tables.c    |  3 -
>   drivers/gpu/drm/i915/display/intel_vdsc.c     | 29 +++++--
>   include/drm/display/drm_dp_helper.h           |  1 +
>   15 files changed, 266 insertions(+), 100 deletions(-)
>