[PATCH RFC 0/5] Introduce MSM-specific DSC helpers

[Jessica Zhang]

There are some overlap in calculations for MSM-specific DSC variables between DP and DSI. In addition, the calculations for initial_scale_value and det_thresh_flatness that are defined within the DSC 1.2 specifications, but aren't yet included in drm_dsc_helper.c.

This series moves these calculations to a shared msm_dsc_helper.c file and defines drm_dsc_helper methods for initial_scale_value and det_thresh_flatness.

Note: For now, the MSM specific helper methods are only called for the DSI path, but will called for DP once DSC 1.2 support for DP has been added.

Depends on: "drm/i915: move DSC RC tables to drm_dsc_helper.c" [1]

[1] https://patchwork.freedesktop.org/series/114472/

---
Jessica Zhang (5):
      drm/display/dsc: Add flatness and initial scale value calculations
      drm/msm: Add MSM-specific DSC helper methods
      drm/msm/dpu: Use DRM DSC helper for det_thresh_flatness
      drm/msm/dpu: Fix slice_last_group_size calculation
      drm/msm/dsi: Use MSM and DRM DSC helper methods

 drivers/gpu/drm/msm/Makefile               |  1 +
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c | 10 +++-
 drivers/gpu/drm/msm/disp/msm_dsc_helper.c  | 74 ++++++++++++++++++++++++++++++
 drivers/gpu/drm/msm/disp/msm_dsc_helper.h  | 28 +++++++++++
 drivers/gpu/drm/msm/dsi/dsi_host.c         | 18 +++++---
 include/drm/display/drm_dsc_helper.h       | 10 ++++
 6 files changed, 133 insertions(+), 8 deletions(-)
---
base-commit: 56777fc93a145afcf71b92ba4281250f59ba6d9b
change-id: 20230329-rfc-msm-dsc-helper-981a95edfbd0

Best regards,
-- 
Jessica Zhang <quic_jesszhan at quicinc.com>