diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c index 7725a406c16e..66180b4332f1 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c @@ -2498,3 +2498,30 @@ void dcn20_fpga_init_hw(struct dc *dc) tg->funcs->tg_init(tg); } } +#ifndef TRIM_FSFT +bool dcn20_optimize_timing_for_fsft(struct dc *dc, + struct dc_crtc_timing *timing, + unsigned int max_input_rate_in_khz) +{ + unsigned int old_v_front_porch; + unsigned int old_v_total; + unsigned int max_input_rate_in_100hz; + unsigned long long new_v_total; + + max_input_rate_in_100hz = max_input_rate_in_khz * 10; + if (max_input_rate_in_100hz < timing->pix_clk_100hz) + return false; + + old_v_total = timing->v_total; + old_v_front_porch = timing->v_front_porch; + + timing->fast_transport_output_rate_100hz = timing->pix_clk_100hz; + timing->pix_clk_100hz = max_input_rate_in_100hz; + + new_v_total = div_u64((unsigned long long)old_v_total * max_input_rate_in_100hz, timing->pix_clk_100hz); + + timing->v_total = new_v_total; + timing->v_front_porch = old_v_front_porch + (timing->v_total - old_v_total); + return true; +} +#endif |