From 570bc18c2966b05f556bedca24245a497db5ed13 Mon Sep 17 00:00:00 2001 From: Dmytro Laktyushkin Date: Mon, 27 Apr 2020 14:55:08 -0400 Subject: [PATCH] drm/amd/display: fix and simplify pipe split logic Current odm/mpc combine logic to detect which pipes need to split logically is flawed leading to incorrect pipe merge/split operations being taken. This change cleans up the logic and fixes the logical errors. Signed-off-by: Dmytro Laktyushkin Reviewed-by: Eric Bernstein Acked-by: Rodrigo Siqueira Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 25 +++- .../gpu/drm/amd/display/dc/dcn20/dcn20_resource.c | 153 ++++++++++----------- .../gpu/drm/amd/display/dc/dcn20/dcn20_resource.h | 5 +- drivers/gpu/drm/amd/display/dc/inc/resource.h | 2 + 4 files changed, 94 insertions(+), 91 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c index bbef8c6..0c56193 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c @@ -532,6 +532,24 @@ static inline void get_vp_scan_direction( *flip_horz_scan_dir = !*flip_horz_scan_dir; } +int get_num_mpc_splits(struct pipe_ctx *pipe) +{ + int mpc_split_count = 0; + struct pipe_ctx *other_pipe = pipe->bottom_pipe; + + while (other_pipe && other_pipe->plane_state == pipe->plane_state) { + mpc_split_count++; + other_pipe = other_pipe->bottom_pipe; + } + other_pipe = pipe->top_pipe; + while (other_pipe && other_pipe->plane_state == pipe->plane_state) { + mpc_split_count++; + other_pipe = other_pipe->top_pipe; + } + + return mpc_split_count; +} + int get_num_odm_splits(struct pipe_ctx *pipe) { int odm_split_count = 0; @@ -556,16 +574,11 @@ static void calculate_split_count_and_index(struct pipe_ctx *pipe_ctx, int *spli /*Check for mpc split*/ struct pipe_ctx *split_pipe = pipe_ctx->top_pipe; + *split_count = get_num_mpc_splits(pipe_ctx); while (split_pipe && split_pipe->plane_state == pipe_ctx->plane_state) { (*split_idx)++; - (*split_count)++; split_pipe = split_pipe->top_pipe; } - split_pipe = pipe_ctx->bottom_pipe; - while (split_pipe && split_pipe->plane_state == pipe_ctx->plane_state) { - (*split_count)++; - split_pipe = split_pipe->bottom_pipe; - } } else { /*Get odm split index*/ struct pipe_ctx *split_pipe = pipe_ctx->prev_odm_pipe; 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 4912160..4190ee5 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c @@ -1663,7 +1663,7 @@ enum dc_status dcn20_build_mapped_resource(const struct dc *dc, struct dc_state } -static void acquire_dsc(const struct dc *dc, +void dcn20_acquire_dsc(const struct dc *dc, struct resource_context *res_ctx, struct display_stream_compressor **dsc, int pipe_idx) @@ -1731,7 +1731,7 @@ enum dc_status dcn20_add_dsc_to_stream_resource(struct dc *dc, if (pipe_ctx->stream_res.dsc) continue; - acquire_dsc(dc, &dc_ctx->res_ctx, &pipe_ctx->stream_res.dsc, i); + dcn20_acquire_dsc(dc, &dc_ctx->res_ctx, &pipe_ctx->stream_res.dsc, i); /* The number of DSCs can be less than the number of pipes */ if (!pipe_ctx->stream_res.dsc) { @@ -1923,7 +1923,7 @@ bool dcn20_split_stream_for_odm( } next_odm_pipe->stream_res.opp = pool->opps[next_odm_pipe->pipe_idx]; if (next_odm_pipe->stream->timing.flags.DSC == 1) { - acquire_dsc(dc, res_ctx, &next_odm_pipe->stream_res.dsc, next_odm_pipe->pipe_idx); + dcn20_acquire_dsc(dc, res_ctx, &next_odm_pipe->stream_res.dsc, next_odm_pipe->pipe_idx); ASSERT(next_odm_pipe->stream_res.dsc); if (next_odm_pipe->stream_res.dsc == NULL) return false; @@ -2586,27 +2586,6 @@ static void dcn20_merge_pipes_for_validate( } } -int dcn20_find_previous_split_count(struct pipe_ctx *pipe) -{ - int previous_split = 1; - struct pipe_ctx *current_pipe = pipe; - - while (current_pipe->bottom_pipe) { - if (current_pipe->plane_state != current_pipe->bottom_pipe->plane_state) - break; - previous_split++; - current_pipe = current_pipe->bottom_pipe; - } - current_pipe = pipe; - while (current_pipe->top_pipe) { - if (current_pipe->plane_state != current_pipe->top_pipe->plane_state) - break; - previous_split++; - current_pipe = current_pipe->top_pipe; - } - return previous_split; -} - int dcn20_validate_apply_pipe_split_flags( struct dc *dc, struct dc_state *context, @@ -2618,6 +2597,8 @@ int dcn20_validate_apply_pipe_split_flags( int plane_count = 0; bool force_split = false; bool avoid_split = dc->debug.pipe_split_policy == MPC_SPLIT_AVOID; + struct vba_vars_st *v = &context->bw_ctx.dml.vba; + int max_mpc_comb = v->maxMpcComb; if (context->stream_count > 1) { if (dc->debug.pipe_split_policy == MPC_SPLIT_AVOID_MULT_DISP) @@ -2638,15 +2619,13 @@ int dcn20_validate_apply_pipe_split_flags( /* Avoid split loop looks for lowest voltage level that allows most unsplit pipes possible */ if (avoid_split) { - int max_mpc_comb = context->bw_ctx.dml.vba.maxMpcComb; - for (i = 0, pipe_idx = 0; i < dc->res_pool->pipe_count; i++) { if (!context->res_ctx.pipe_ctx[i].stream) continue; for (vlevel_split = vlevel; vlevel <= context->bw_ctx.dml.soc.num_states; vlevel++) - if (context->bw_ctx.dml.vba.NoOfDPP[vlevel][0][pipe_idx] == 1 && - context->bw_ctx.dml.vba.ModeSupport[vlevel][0]) + if (v->NoOfDPP[vlevel][0][pipe_idx] == 1 && + v->ModeSupport[vlevel][0]) break; /* Impossible to not split this pipe */ if (vlevel > context->bw_ctx.dml.soc.num_states) @@ -2655,21 +2634,21 @@ int dcn20_validate_apply_pipe_split_flags( max_mpc_comb = 0; pipe_idx++; } - context->bw_ctx.dml.vba.maxMpcComb = max_mpc_comb; + v->maxMpcComb = max_mpc_comb; } /* Split loop sets which pipe should be split based on dml outputs and dc flags */ for (i = 0, pipe_idx = 0; i < dc->res_pool->pipe_count; i++) { struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i]; - int pipe_plane = context->bw_ctx.dml.vba.pipe_plane[pipe_idx]; + int pipe_plane = v->pipe_plane[pipe_idx]; + bool split4mpc = context->stream_count == 1 && plane_count == 1 + && dc->config.enable_4to1MPC && dc->res_pool->pipe_count >= 4; if (!context->res_ctx.pipe_ctx[i].stream) continue; - if (force_split - || context->bw_ctx.dml.vba.NoOfDPP[vlevel][context->bw_ctx.dml.vba.maxMpcComb][pipe_plane] > 1) { - if (context->stream_count == 1 && plane_count == 1 - && dc->config.enable_4to1MPC && dc->res_pool->pipe_count >= 4) + if (force_split || v->NoOfDPP[vlevel][max_mpc_comb][pipe_plane] > 1) { + if (split4mpc) split[i] = 4; else split[i] = 2; @@ -2685,66 +2664,72 @@ int dcn20_validate_apply_pipe_split_flags( split[i] = 2; if (dc->debug.force_odm_combine & (1 << pipe->stream_res.tg->inst)) { split[i] = 2; - context->bw_ctx.dml.vba.ODMCombineEnablePerState[vlevel][pipe_plane] = dm_odm_combine_mode_2to1; + v->ODMCombineEnablePerState[vlevel][pipe_plane] = dm_odm_combine_mode_2to1; } - context->bw_ctx.dml.vba.ODMCombineEnabled[pipe_plane] = - context->bw_ctx.dml.vba.ODMCombineEnablePerState[vlevel][pipe_plane]; - - if (pipe->prev_odm_pipe && context->bw_ctx.dml.vba.ODMCombineEnabled[pipe_plane] != dm_odm_combine_mode_disabled) { - /*Already split odm pipe tree, don't try to split again*/ - split[i] = 0; - split[pipe->prev_odm_pipe->pipe_idx] = 0; - } else if (pipe->top_pipe && pipe->plane_state == pipe->top_pipe->plane_state - && context->bw_ctx.dml.vba.ODMCombineEnabled[pipe_plane] == dm_odm_combine_mode_disabled) { - /*If 2 way split but can support 4 way split, then split each pipe again*/ - if (context->stream_count == 1 && plane_count == 1 - && dc->config.enable_4to1MPC && dc->res_pool->pipe_count >= 4) { - split[i] = 2; - } else { + v->ODMCombineEnabled[pipe_plane] = + v->ODMCombineEnablePerState[vlevel][pipe_plane]; + + if (v->ODMCombineEnabled[pipe_plane] == dm_odm_combine_mode_disabled) { + if (get_num_mpc_splits(pipe) == 1) { + /*If need split for mpc but 2 way split already*/ + if (split[i] == 4) + split[i] = 2; /* 2 -> 4 MPC */ + else if (split[i] == 2) + split[i] = 0; /* 2 -> 2 MPC */ + else if (pipe->top_pipe && pipe->top_pipe->plane_state == pipe->plane_state) + merge[i] = true; /* 2 -> 1 MPC */ + } else if (get_num_mpc_splits(pipe) == 3) { + /*If need split for mpc but 4 way split already*/ + if (split[i] == 2 && ((pipe->top_pipe && !pipe->top_pipe->top_pipe) + || !pipe->bottom_pipe)) { + merge[i] = true; /* 4 -> 2 MPC */ + } else if (split[i] == 0 && pipe->top_pipe && + pipe->top_pipe->plane_state == pipe->plane_state) + merge[i] = true; /* 4 -> 1 MPC */ split[i] = 0; - split[pipe->top_pipe->pipe_idx] = 0; - } - } else if (pipe->prev_odm_pipe || (dcn20_find_previous_split_count(pipe) == 2 && pipe->top_pipe)) { - if (split[i] == 0) { - /*Exiting mpc/odm combine*/ - merge[i] = true; - } else { - /*Transition from mpc combine to odm combine or vice versa*/ - ASSERT(0); /*should not actually happen yet*/ - split[i] = 2; - merge[i] = true; + } else if (get_num_odm_splits(pipe)) { + /* ODM -> MPC transition */ + ASSERT(0); /* NOT expected yet */ if (pipe->prev_odm_pipe) { - split[pipe->prev_odm_pipe->pipe_idx] = 2; - merge[pipe->prev_odm_pipe->pipe_idx] = true; - } else { - split[pipe->top_pipe->pipe_idx] = 2; - merge[pipe->top_pipe->pipe_idx] = true; + split[i] = 0; + merge[i] = true; } } - } else if (dcn20_find_previous_split_count(pipe) == 3) { - if (split[i] == 0 && !pipe->top_pipe) { - merge[pipe->bottom_pipe->pipe_idx] = true; - merge[pipe->bottom_pipe->bottom_pipe->pipe_idx] = true; - } else if (split[i] == 2 && !pipe->top_pipe) { - merge[pipe->bottom_pipe->bottom_pipe->pipe_idx] = true; - split[i] = 0; - } - } else if (dcn20_find_previous_split_count(pipe) == 4) { - if (split[i] == 0 && !pipe->top_pipe) { - merge[pipe->bottom_pipe->pipe_idx] = true; - merge[pipe->bottom_pipe->bottom_pipe->pipe_idx] = true; - merge[pipe->bottom_pipe->bottom_pipe->bottom_pipe->pipe_idx] = true; - } else if (split[i] == 2 && !pipe->top_pipe) { - merge[pipe->bottom_pipe->bottom_pipe->pipe_idx] = true; - merge[pipe->bottom_pipe->bottom_pipe->bottom_pipe->pipe_idx] = true; + } else { + if (get_num_odm_splits(pipe) == 1) { + /*If need split for odm but 2 way split already*/ + if (split[i] == 4) + split[i] = 2; /* 2 -> 4 ODM */ + else if (split[i] == 2) + split[i] = 0; /* 2 -> 2 ODM */ + else if (pipe->prev_odm_pipe) { + ASSERT(0); /* NOT expected yet */ + merge[i] = true; /* exit ODM */ + } + } else if (get_num_odm_splits(pipe) == 3) { + /*If need split for odm but 4 way split already*/ + if (split[i] == 2 && ((pipe->prev_odm_pipe && !pipe->prev_odm_pipe->prev_odm_pipe) + || !pipe->next_odm_pipe)) { + ASSERT(0); /* NOT expected yet */ + merge[i] = true; /* 4 -> 2 ODM */ + } else if (split[i] == 0 && pipe->prev_odm_pipe) { + ASSERT(0); /* NOT expected yet */ + merge[i] = true; /* exit ODM */ + } split[i] = 0; + } else if (get_num_mpc_splits(pipe)) { + /* MPC -> ODM transition */ + ASSERT(0); /* NOT expected yet */ + if (pipe->top_pipe && pipe->top_pipe->plane_state == pipe->plane_state) { + split[i] = 0; + merge[i] = true; + } } } /* Adjust dppclk when split is forced, do not bother with dispclk */ - if (split[i] != 0 - && context->bw_ctx.dml.vba.NoOfDPP[vlevel][context->bw_ctx.dml.vba.maxMpcComb][pipe_idx] == 1) - context->bw_ctx.dml.vba.RequiredDPPCLK[vlevel][context->bw_ctx.dml.vba.maxMpcComb][pipe_idx] /= 2; + if (split[i] != 0 && v->NoOfDPP[vlevel][max_mpc_comb][pipe_idx] == 1) + v->RequiredDPPCLK[vlevel][max_mpc_comb][pipe_idx] /= 2; pipe_idx++; } diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.h b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.h index ed5d312..2c19598 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.h +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.h @@ -119,7 +119,6 @@ void dcn20_set_mcif_arb_params( display_e2e_pipe_params_st *pipes, int pipe_cnt); bool dcn20_validate_bandwidth(struct dc *dc, struct dc_state *context, bool fast_validate); -int dcn20_find_previous_split_count(struct pipe_ctx *pipe); int dcn20_validate_apply_pipe_split_flags( struct dc *dc, struct dc_state *context, @@ -140,6 +139,10 @@ bool dcn20_split_stream_for_odm( struct resource_context *res_ctx, struct pipe_ctx *prev_odm_pipe, struct pipe_ctx *next_odm_pipe); +void dcn20_acquire_dsc(const struct dc *dc, + struct resource_context *res_ctx, + struct display_stream_compressor **dsc, + int pipe_idx); struct pipe_ctx *dcn20_find_secondary_pipe(struct dc *dc, struct resource_context *res_ctx, const struct resource_pool *pool, diff --git a/drivers/gpu/drm/amd/display/dc/inc/resource.h b/drivers/gpu/drm/amd/display/dc/inc/resource.h index 109c589..a9be495 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/resource.h +++ b/drivers/gpu/drm/amd/display/dc/inc/resource.h @@ -177,6 +177,8 @@ unsigned int resource_pixel_format_to_bpp(enum surface_pixel_format format); void get_audio_check(struct audio_info *aud_modes, struct audio_check *aud_chk); +int get_num_mpc_splits(struct pipe_ctx *pipe); + int get_num_odm_splits(struct pipe_ctx *pipe); #endif /* DRIVERS_GPU_DRM_AMD_DC_DEV_DC_INC_RESOURCE_H_ */ -- 2.7.4