From e4e481e4d838f30985dd46d43ed195110ed265f5 Mon Sep 17 00:00:00 2001 From: Zhikai Zhai Date: Tue, 20 Sep 2022 18:51:02 +0800 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. Reviewed-by: Dillon Varone Acked-by: Hamza Mahfooz Signed-off-by: Zhikai Zhai Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index a81a61f006c4b..6216ceb790b4b 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -3638,10 +3638,30 @@ 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) + 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; -- 2.30.2