[v7,0/8] drm/i915: move DSC RC tables to drm_dsc_helper.c

Message

Dmitry Baryshkov May 17, 2023, 10:27 a.m. UTC

Other platforms (msm) will benefit from sharing the DSC config setup
functions. This series moves parts of static DSC config data from the
i915 driver to the common helpers to be used by other drivers.

Note: the RC parameters were cross-checked against config files found in
DSC model 2021062, 20161212 (and 20150914). The first patch modifies
tables according to those config files, while preserving parameter
values using the code. I have not changed one of the values in the
pre-SCR config file as it clearly looks like a typo in the config file,
considering the table E in DSC 1.1 and in the DSC 1.1 SCR.

Chances since v6:
- Fixed a leftover of kind/type conversion (Suraj, lkp)

Chances since v5:
- Fixed typo in patch #2 commit message (Marijn)
- Reworded/fixed RC table comments to mention DSC standards and C model
  versions (Suraj)
- Renamed enum drm_dsc_param_kind to drm_dsc_param_type (Suraj).

Chances since v4:
- Rebased on top of drm-intel-next
- Cut the first 8 patches of the series to ease merging. The rest of the
  patches will go afterwards.

Chances since v3:
- Rebased on top of drm-intel-next
- Dropped the msm patch to make patchset fully mergeable through
  drm-intel
- Made drm_dsc_set_const_params() ignore rc_model_size, picked up
  drm_dsc_set_initial_scale_value() patch by Jessica and switched
  intel_vdsc.c to use those two helpers.
- Added a patch to make i915 actually use rc_tgt_offset_high,
  rc_tgt_offset_low and rc_edge_factor from struct drm_dsc_config.

Chances since v2:
- Rebased on top of drm-intel-next

Dmitry Baryshkov (8):
  drm/i915/dsc: change DSC param tables to follow the DSC model
  drm/i915/dsc: move rc_buf_thresh values to common helper
  drm/i915/dsc: move DSC tables to DRM DSC helper
  drm/i915/dsc: stop using interim structure for calculated params
  drm/display/dsc: use flat array for rc_parameters lookup
  drm/display/dsc: split DSC 1.2 and DSC 1.1 (pre-SCR) parameters
  drm/display/dsc: include the rest of pre-SCR parameters
  drm/display/dsc: add YCbCr 4:2:2 and 4:2:0 RC parameters

 drivers/gpu/drm/display/drm_dsc_helper.c  | 1006 +++++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_vdsc.c |  443 +--------
 include/drm/display/drm_dsc_helper.h      |    9 +
 3 files changed, 1062 insertions(+), 396 deletions(-)