From: Joshua Aberback Date: Thu, 12 Sep 2024 22:47:22 +0000 (-0400) Subject: drm/amd/display: Clip rect size changes should be full updates X-Git-Tag: v6.13-rc1~122^2~15^2~217 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ce5057885ff70d0b61f5c332639e685b7ea720e8;p=thirdparty%2Fkernel%2Flinux.git drm/amd/display: Clip rect size changes should be full updates [Why] In cases where an MPO plane is being dragged around partially off-screen, it is possible to get a flip where the only scaling parameters to change are the clip rect size and position. Currently, clip rect size changes are considered medium updates, which can result in the clip rect being used for HW programming being larger than the clip rect that was used for the last DML validation. This can lead to mismatches in different parts of the pipe and can result in a p-state hang. [How] - consider clip rect size changes scaling changes, therefore full updates - refactor get_scaling_info_update_type for clarity - remove clip_size_change update flag Clip rect size changes were previously demoted from full updates as an optimization when the MPO + ODM policy changed to always pre-allocate MPO pipes, but it created the issue described above. Personally testing this use case, the performance feels fine with full update spam, and we expect this is a fairly infrequent use case. If the performance needs to be optimized in the future, consider reworking the entire update type logic to run a DML pass and determine the update type based on what DML says will actually change. Reviewed-by: Dillon Varone Signed-off-by: Joshua Aberback Signed-off-by: Aurabindo Pillai Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index 4c33e3b14c4f5..9c8e98682c4e7 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -2515,41 +2515,35 @@ static enum surface_update_type get_scaling_info_update_type( if (!u->scaling_info) return UPDATE_TYPE_FAST; - if (u->scaling_info->dst_rect.width != u->surface->dst_rect.width + if (u->scaling_info->src_rect.width != u->surface->src_rect.width + || u->scaling_info->src_rect.height != u->surface->src_rect.height + || u->scaling_info->dst_rect.width != u->surface->dst_rect.width || u->scaling_info->dst_rect.height != u->surface->dst_rect.height + || u->scaling_info->clip_rect.width != u->surface->clip_rect.width + || u->scaling_info->clip_rect.height != u->surface->clip_rect.height || u->scaling_info->scaling_quality.integer_scaling != - u->surface->scaling_quality.integer_scaling - ) { + u->surface->scaling_quality.integer_scaling) { update_flags->bits.scaling_change = 1; + if (u->scaling_info->src_rect.width > u->surface->src_rect.width + || u->scaling_info->src_rect.height > u->surface->src_rect.height) + /* Making src rect bigger requires a bandwidth change */ + update_flags->bits.clock_change = 1; + if ((u->scaling_info->dst_rect.width < u->surface->dst_rect.width || u->scaling_info->dst_rect.height < u->surface->dst_rect.height) && (u->scaling_info->dst_rect.width < u->surface->src_rect.width || u->scaling_info->dst_rect.height < u->surface->src_rect.height)) /* Making dst rect smaller requires a bandwidth change */ update_flags->bits.bandwidth_change = 1; - } - - if (u->scaling_info->src_rect.width != u->surface->src_rect.width - || u->scaling_info->src_rect.height != u->surface->src_rect.height) { - update_flags->bits.scaling_change = 1; - if (u->scaling_info->src_rect.width > u->surface->src_rect.width - || u->scaling_info->src_rect.height > u->surface->src_rect.height) - /* Making src rect bigger requires a bandwidth change */ - update_flags->bits.clock_change = 1; + if (u->scaling_info->src_rect.width > dc->caps.max_optimizable_video_width && + (u->scaling_info->clip_rect.width > u->surface->clip_rect.width || + u->scaling_info->clip_rect.height > u->surface->clip_rect.height)) + /* Changing clip size of a large surface may result in MPC slice count change */ + update_flags->bits.bandwidth_change = 1; } - if (u->scaling_info->src_rect.width > dc->caps.max_optimizable_video_width && - (u->scaling_info->clip_rect.width > u->surface->clip_rect.width || - u->scaling_info->clip_rect.height > u->surface->clip_rect.height)) - /* Changing clip size of a large surface may result in MPC slice count change */ - update_flags->bits.bandwidth_change = 1; - - if (u->scaling_info->clip_rect.width != u->surface->clip_rect.width || - u->scaling_info->clip_rect.height != u->surface->clip_rect.height) - update_flags->bits.clip_size_change = 1; - if (u->scaling_info->src_rect.x != u->surface->src_rect.x || u->scaling_info->src_rect.y != u->surface->src_rect.y || u->scaling_info->clip_rect.x != u->surface->clip_rect.x @@ -2558,13 +2552,13 @@ static enum surface_update_type get_scaling_info_update_type( || u->scaling_info->dst_rect.y != u->surface->dst_rect.y) update_flags->bits.position_change = 1; + /* process every update flag before returning */ if (update_flags->bits.clock_change || update_flags->bits.bandwidth_change || update_flags->bits.scaling_change) return UPDATE_TYPE_FULL; - if (update_flags->bits.position_change || - update_flags->bits.clip_size_change) + if (update_flags->bits.position_change) return UPDATE_TYPE_MED; return UPDATE_TYPE_FAST; @@ -3263,8 +3257,7 @@ static bool update_planes_and_stream_state(struct dc *dc, if (update_type != UPDATE_TYPE_MED) continue; - if (surface->update_flags.bits.clip_size_change || - surface->update_flags.bits.position_change) { + if (surface->update_flags.bits.position_change) { for (j = 0; j < dc->res_pool->pipe_count; j++) { struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[j]; diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h index d3b6a389fecef..6d60f7597f88f 100644 --- a/drivers/gpu/drm/amd/display/dc/dc.h +++ b/drivers/gpu/drm/amd/display/dc/dc.h @@ -1254,7 +1254,6 @@ union surface_update_flags { uint32_t rotation_change:1; uint32_t swizzle_change:1; uint32_t scaling_change:1; - uint32_t clip_size_change: 1; uint32_t position_change:1; uint32_t in_transfer_func_change:1; uint32_t input_csc_change:1; diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c index b383ed8cb4d49..e89499536c460 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c @@ -1732,7 +1732,6 @@ static void dcn20_update_dchubp_dpp( if (pipe_ctx->update_flags.bits.scaler || plane_state->update_flags.bits.scaling_change || plane_state->update_flags.bits.position_change || - plane_state->update_flags.bits.clip_size_change || plane_state->update_flags.bits.per_pixel_alpha_change || pipe_ctx->stream->update_flags.bits.scaling) { pipe_ctx->plane_res.scl_data.lb_params.alpha_en = pipe_ctx->plane_state->per_pixel_alpha; @@ -1745,7 +1744,6 @@ static void dcn20_update_dchubp_dpp( if (pipe_ctx->update_flags.bits.viewport || (context == dc->current_state && plane_state->update_flags.bits.position_change) || (context == dc->current_state && plane_state->update_flags.bits.scaling_change) || - (context == dc->current_state && plane_state->update_flags.bits.clip_size_change) || (context == dc->current_state && pipe_ctx->stream->update_flags.bits.scaling)) { hubp->funcs->mem_program_viewport(