Hi Ankit,
...
> - if (bpp <= 8) {
> + if (bpp <= 8)
> range_bpg_offset = ofs_und4[buf_i];
> - } else if (bpp <= 10) {
> - res = DIV_ROUND_UP(((bpp - 8) *
> - (ofs_und5[buf_i] - ofs_und4[buf_i])), 2);
> - range_bpg_offset = ofs_und4[buf_i] + res;
> - } else if (bpp <= 12) {
> - res = DIV_ROUND_UP(((bpp - 10) *
> - (ofs_und6[buf_i] - ofs_und5[buf_i])), 2);
> - range_bpg_offset = ofs_und5[buf_i] + res;
> - } else if (bpp <= 16) {
> - res = DIV_ROUND_UP(((bpp - 12) *
> - (ofs_und8[buf_i] - ofs_und6[buf_i])), 4);
> - range_bpg_offset = ofs_und6[buf_i] + res;
> - } else {
> + else if (bpp <= 10)
> + range_bpg_offset = get_range_bpg_offset(8, ofs_und4[buf_i],
> + 10, ofs_und5[buf_i], bpp);
> + else if (bpp <= 12)
> + range_bpg_offset = get_range_bpg_offset(10, ofs_und5[buf_i],
> + 12, ofs_und6[buf_i], bpp);
> + else if (bpp <= 16)
> + range_bpg_offset = get_range_bpg_offset(12, ofs_und6[buf_i],
> + 16, ofs_und8[buf_i], bpp);
> + else
> range_bpg_offset = ofs_und8[buf_i];
> - }
I tried to get these ifs out of the for loop, because the bpp
value doesn't change during the execution here, but I don't
think it is worth it due to offset buffers changing depending
on bpp value and I believe your solution is good for what we
could do here:
Reviewed-by: Krzysztof Karas <krzysztof.karas@xxxxxxxxx>
Krzysztof
>
> vdsc_cfg->rc_range_params[buf_i].range_bpg_offset =
> range_bpg_offset & DSC_RANGE_BPG_OFFSET_MASK;
> @@ -215,21 +218,19 @@ calculate_rc_params(struct drm_dsc_config *vdsc_cfg)
> intel_vdsc_set_min_max_qp(vdsc_cfg, buf_i, bpp_i);
>
> /* Calculate range_bpg_offset */
> - if (bpp <= 6) {
> + if (bpp <= 6)
> range_bpg_offset = ofs_und6[buf_i];
> - } else if (bpp <= 8) {
> - res = DIV_ROUND_UP(((bpp - 6) *
> - (ofs_und8[buf_i] - ofs_und6[buf_i])), 2);
> - range_bpg_offset = ofs_und6[buf_i] + res;
> - } else if (bpp <= 12) {
> - range_bpg_offset = ofs_und8[buf_i];
> - } else if (bpp <= 15) {
> - res = DIV_ROUND_UP(((bpp - 12) *
> - (ofs_und15[buf_i] - ofs_und12[buf_i])), 3);
> - range_bpg_offset = ofs_und12[buf_i] + res;
> - } else {
> + else if (bpp <= 8)
> + range_bpg_offset = get_range_bpg_offset(6, ofs_und6[buf_i],
> + 8, ofs_und8[buf_i], bpp);
> + else if (bpp <= 12)
> + range_bpg_offset = get_range_bpg_offset(8, ofs_und8[buf_i],
> + 12, ofs_und12[buf_i], bpp);
> + else if (bpp <= 15)
> + range_bpg_offset = get_range_bpg_offset(12, ofs_und12[buf_i],
> + 15, ofs_und15[buf_i], bpp);
> + else
> range_bpg_offset = ofs_und15[buf_i];
> - }
>
> vdsc_cfg->rc_range_params[buf_i].range_bpg_offset =
> range_bpg_offset & DSC_RANGE_BPG_OFFSET_MASK;
> --
> 2.45.2
>
