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/ --- Changes in v2: - Changed det_thresh_flatness to flatness_det_thresh - Moved msm_dsc_helper files to msm/ directory - Fixed type mismatch issues in MSM DSC helpers - Dropped MSM_DSC_SLICE_PER_PKT macro - Removed get_comp_ratio() helper - Style changes to improve readability - Use drm_dsc_get_bpp_int() instead of DSC_BPP macro - Picked up Fixes tags for patches 3/5 and 4/5 - Picked up Reviewed-by for patch 4/5 - Split eol_byte_num and pkt_per_line calculation into a separate patch - Moved pclk_per_line calculation into `if (dsc)` block in dsi_timing_setup() - Link to v1: https://lore.kernel.org/r/20230329-rfc-msm-dsc-helper-v1-0-f3e479f59b6d@xxxxxxxxxxx --- Jessica Zhang (6): 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 drm/msm/dsi: Fix calculations for eol_byte_num and pkt_per_line drivers/gpu/drm/msm/Makefile | 1 + drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c | 10 ++++-- drivers/gpu/drm/msm/dsi/dsi_host.c | 21 ++++++++---- drivers/gpu/drm/msm/msm_dsc_helper.c | 53 ++++++++++++++++++++++++++++++ drivers/gpu/drm/msm/msm_dsc_helper.h | 42 +++++++++++++++++++++++ include/drm/display/drm_dsc_helper.h | 11 +++++++ 6 files changed, 129 insertions(+), 9 deletions(-) --- base-commit: 56777fc93a145afcf71b92ba4281250f59ba6d9b change-id: 20230329-rfc-msm-dsc-helper-981a95edfbd0 Best regards, -- Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>
