From: Ryan Seto <[email protected]> [Why & How] In theory, driver should be able to support disabling force pstate allow after hardware release however this behavior is not tested yet. Introducing a new toggle to disable the force on the fly.
Reviewed-by: Dillon Varone <[email protected]> Signed-off-by: Ryan Seto <[email protected]> Signed-off-by: Roman Li <[email protected]> --- drivers/gpu/drm/amd/display/dc/dc.h | 1 + .../amd/display/dc/hwss/dcn401/dcn401_hwseq.c | 36 +++++++++++-------- .../dc/resource/dcn401/dcn401_resource.c | 1 + 3 files changed, 24 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h index c013b28207a1..a83227f6bb14 100644 --- a/drivers/gpu/drm/amd/display/dc/dc.h +++ b/drivers/gpu/drm/amd/display/dc/dc.h @@ -1073,6 +1073,7 @@ struct dc_debug_options { unsigned int force_mall_ss_num_ways; bool alloc_extra_way_for_cursor; uint32_t subvp_extra_lines; + bool disable_force_pstate_allow_on_hw_release; bool force_usr_allow; /* uses value at boot and disables switch */ bool disable_dtb_ref_clk_switch; diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c index fb949aeb1244..d5b5e2ce6ff6 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c @@ -1621,20 +1621,28 @@ void dcn401_unblank_stream(struct pipe_ctx *pipe_ctx, void dcn401_hardware_release(struct dc *dc) { - dc_dmub_srv_fams2_update_config(dc, dc->current_state, false); - - /* If pstate unsupported, or still supported - * by firmware, force it supported by dcn - */ - if (dc->current_state) { - if ((!dc->clk_mgr->clks.p_state_change_support || - dc->current_state->bw_ctx.bw.dcn.fams2_global_config.features.bits.enable) && - dc->res_pool->hubbub->funcs->force_pstate_change_control) - dc->res_pool->hubbub->funcs->force_pstate_change_control( - dc->res_pool->hubbub, true, true); - - dc->current_state->bw_ctx.bw.dcn.clk.p_state_change_support = true; - dc->clk_mgr->funcs->update_clocks(dc->clk_mgr, dc->current_state, true); + if (!dc->debug.disable_force_pstate_allow_on_hw_release) { + dc_dmub_srv_fams2_update_config(dc, dc->current_state, false); + + /* If pstate unsupported, or still supported + * by firmware, force it supported by dcn + */ + if (dc->current_state) { + if ((!dc->clk_mgr->clks.p_state_change_support || + dc->current_state->bw_ctx.bw.dcn.fams2_global_config.features.bits.enable) && + dc->res_pool->hubbub->funcs->force_pstate_change_control) + dc->res_pool->hubbub->funcs->force_pstate_change_control( + dc->res_pool->hubbub, true, true); + + dc->current_state->bw_ctx.bw.dcn.clk.p_state_change_support = true; + dc->clk_mgr->funcs->update_clocks(dc->clk_mgr, dc->current_state, true); + } + } else { + if (dc->current_state) { + dc->clk_mgr->clks.p_state_change_support = false; + dc->clk_mgr->funcs->update_clocks(dc->clk_mgr, dc->current_state, true); + } + dc_dmub_srv_fams2_update_config(dc, dc->current_state, false); } } diff --git a/drivers/gpu/drm/amd/display/dc/resource/dcn401/dcn401_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dcn401/dcn401_resource.c index b3988e38d0a6..068c123ea8a8 100644 --- a/drivers/gpu/drm/amd/display/dc/resource/dcn401/dcn401_resource.c +++ b/drivers/gpu/drm/amd/display/dc/resource/dcn401/dcn401_resource.c @@ -708,6 +708,7 @@ static const struct dc_debug_options debug_defaults_drv = { }, .use_max_lb = true, .force_disable_subvp = false, + .disable_force_pstate_allow_on_hw_release = false, .exit_idle_opt_for_cursor_updates = true, .using_dml2 = true, .using_dml21 = true, -- 2.34.1
