From: Jun Lei Date: Fri, 3 May 2019 19:59:54 +0000 (-0400) Subject: drm/amd/display: always use 4 dp lanes for dml X-Git-Tag: v5.15~5873^2~13^2~51 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1621f4c417bf31e2b741a3d876b1d61435a41e18;p=platform%2Fkernel%2Flinux-starfive.git drm/amd/display: always use 4 dp lanes for dml [why] current DML logic uses currently trained setting for number of dp lanes in DML calculations. this is obviously flawed since just because 1 lane is in use doesn't mean only 1 lane can be used this causes mode validation to fail depending on current state, which is incorrect [how] DML should always assume 4 lanes are available. validation of bandwidth is not supposed to be handled by DML, since we do link validation without DML already also, DML is expecting there to be a copy of the max state, this state is removed when update_bounding_box is called to update actual SKU clocks. fix this as well by duping last state. Signed-off-by: Jun Lei Reviewed-by: Dmytro Laktyushkin Acked-by: Bhawanpreet Lakha Acked-by: Eric Yang Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c index caebf47..266d2ea 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c @@ -1619,7 +1619,6 @@ int dcn20_populate_dml_pipes_from_context( for (i = 0, pipe_cnt = 0; i < dc->res_pool->pipe_count; i++) { struct dc_crtc_timing *timing = &res_ctx->pipe_ctx[i].stream->timing; - struct dc_link *link; if (!res_ctx->pipe_ctx[i].stream) continue; @@ -1665,16 +1664,7 @@ int dcn20_populate_dml_pipes_from_context( if (timing->timing_3d_format == TIMING_3D_FORMAT_HW_FRAME_PACKING) pipes[pipe_cnt].pipe.dest.pixel_rate_mhz *= 2; pipes[pipe_cnt].pipe.dest.otg_inst = res_ctx->pipe_ctx[i].stream_res.tg->inst; - - link = res_ctx->pipe_ctx[i].stream->link; - if (link->cur_link_settings.lane_count != LANE_COUNT_UNKNOWN) { - pipes[pipe_cnt].dout.dp_lanes = link->cur_link_settings.lane_count; - } else if (link->verified_link_cap.lane_count != LANE_COUNT_UNKNOWN) { - pipes[pipe_cnt].dout.dp_lanes = link->verified_link_cap.lane_count; - } else { - /* Unknown link capabilities, so assume max */ - pipes[pipe_cnt].dout.dp_lanes = 4; - } + pipes[pipe_cnt].dout.dp_lanes = 4; pipes[pipe_cnt].pipe.dest.vtotal_min = res_ctx->pipe_ctx[i].stream->adjust.v_total_min; pipes[pipe_cnt].pipe.dest.vtotal_max = res_ctx->pipe_ctx[i].stream->adjust.v_total_max;