Drop the UHBR limitation from DP SST DSC, and handle SST DSC bandwidth computation for UHBR using intel_dp_mtp_tu_compute_config().
Cc: Imre Deak <[email protected]> Signed-off-by: Jani Nikula <[email protected]> --- drivers/gpu/drm/i915/display/intel_dp.c | 35 +++++++++++++++++++------ 1 file changed, 27 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index cc6aba353c11..eb8f6806166c 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -1958,15 +1958,37 @@ static int dsc_compute_link_config(struct intel_dp *intel_dp, for (lane_count = limits->min_lane_count; lane_count <= limits->max_lane_count; lane_count <<= 1) { - if (!is_bw_sufficient_for_dsc_config(dsc_bpp_x16, link_rate, - lane_count, adjusted_mode->clock, - pipe_config->output_format, - timeslots)) - continue; + /* + * FIXME: intel_dp_mtp_tu_compute_config() requires + * ->lane_count and ->port_clock set before we know + * they'll work. If we end up failing altogether, + * they'll remain in crtc state. This shouldn't matter, + * as we'd then bail out from compute config, but it's + * just ugly. + */ pipe_config->lane_count = lane_count; pipe_config->port_clock = link_rate; + if (drm_dp_is_uhbr_rate(link_rate)) { + int ret; + + ret = intel_dp_mtp_tu_compute_config(intel_dp, + pipe_config, + conn_state, + dsc_bpp_x16, + dsc_bpp_x16, + 0, true); + if (ret) + continue; + } else { + if (!is_bw_sufficient_for_dsc_config(dsc_bpp_x16, link_rate, + lane_count, adjusted_mode->clock, + pipe_config->output_format, + timeslots)) + continue; + } + return 0; } } @@ -2493,9 +2515,6 @@ intel_dp_compute_config_limits(struct intel_dp *intel_dp, limits->min_rate = intel_dp_min_link_rate(intel_dp); limits->max_rate = intel_dp_max_link_rate(intel_dp); - /* FIXME 128b/132b SST+DSC support missing */ - if (!is_mst && dsc) - limits->max_rate = min(limits->max_rate, 810000); limits->min_rate = min(limits->min_rate, limits->max_rate); limits->min_lane_count = intel_dp_min_lane_count(intel_dp); -- 2.39.5
