Various removals of complex yet unnecessary math, fixing all uses of drm_dsc_config::bits_per_pixel to deal with the fact that this field includes four fractional bits, and finally an approach for dealing with dsi_host setting negative values in range_bpg_offset, resulting in overflow inside drm_dsc_pps_payload_pack(). Note that updating the static bpg_offset array to limit the size of these negative values to 6 bits changes what would be written to the DPU hardware at register(s) DSC_RANGE_BPG_OFFSET, hence the choice has been made to cover up for this while packing the value into a smaller field instead. Altogether this series is responsible for solving _all_ Display Stream Compression issues and artifacts on the Sony Tama (sdm845) Akatsuki smartphone (2880x1440p). Marijn Suijten (5): drm/msm/dsi: Remove useless math in DSC calculation drm/msm/dsi: Remove repeated calculation of slice_per_intf drm/msm/dsi: Account for DSC's bits_per_pixel having 4 fractional bits drm/msm/dpu1: Account for DSC's bits_per_pixel having 4 fractional bits drm/dsc: Prevent negative BPG offsets from shadowing adjacent bitfields drivers/gpu/drm/display/drm_dsc_helper.c | 6 +-- drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c | 11 +----- drivers/gpu/drm/msm/dsi/dsi_host.c | 45 ++++++++++++++-------- 3 files changed, 33 insertions(+), 29 deletions(-) -- 2.37.3