From 1e8fd864afdc7a52df375e888a03b8472fc24f5d Mon Sep 17 00:00:00 2001 From: zhikzhai Date: Thu, 20 Oct 2022 11:46:55 -0400 Subject: [PATCH] drm/amd/display: skip commit minimal transition state [WHY] Now dynamic ODM will now be disabled when MPO is required safe transitions to avoid underflow, but we are triggering the way of minimal transition too often. Commit state of dc with no check will do pipeline setup which may re-initialize the component with no need such as audio. [HOW] Just do the minimal transition when all of pipes are in use, otherwise return true to skip. Tested-by: Mark Broadworth Reviewed-by: Dillon Varone Acked-by: Rodrigo Siqueira Signed-off-by: zhikzhai Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index f6776cc..945b521 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -3738,10 +3738,32 @@ static bool commit_minimal_transition_state(struct dc *dc, bool temp_subvp_policy; enum dc_status ret = DC_ERROR_UNEXPECTED; unsigned int i, j; + unsigned int pipe_in_use = 0; if (!transition_context) return false; + /* check current pipes in use*/ + for (i = 0; i < dc->res_pool->pipe_count; i++) { + struct pipe_ctx *pipe = &transition_base_context->res_ctx.pipe_ctx[i]; + + if (pipe->plane_state) + pipe_in_use++; + } + + /* When the OS add a new surface if we have been used all of pipes with odm combine + * and mpc split feature, it need use commit_minimal_transition_state to transition safely. + * After OS exit MPO, it will back to use odm and mpc split with all of pipes, we need + * call it again. Otherwise return true to skip. + * + * Reduce the scenarios to use dc_commit_state_no_check in the stage of flip. Especially + * enter/exit MPO when DCN still have enough resources. + */ + if (pipe_in_use != dc->res_pool->pipe_count) { + dc_release_state(transition_context); + return true; + } + if (!dc->config.is_vmin_only_asic) { tmp_mpc_policy = dc->debug.pipe_split_policy; dc->debug.pipe_split_policy = MPC_SPLIT_AVOID; -- 2.7.4