Commit ce560ac4 authored by Wesley Chalmers's avatar Wesley Chalmers Committed by Alex Deucher

drm/amd/display: Block optimize on consecutive FAMS enables

[WHY]
It is possible to commit state multiple times in rapid succession with
FAMS enabled; if each of these commits were to set optimized_required,
then the user may see latency.

[HOW]
fw_based_mclk_switching is currently not used in dc->clk_mgr; use it
to track whether the current state has FAMS enabled;
if it has, then do not disable FAMS in prepare_bandwidth, and do not set
optimized_required.
Reviewed-by: default avatarRodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: default avatarWesley Chalmers <Wesley.Chalmers@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 474f0101
......@@ -2117,6 +2117,9 @@ void dcn20_optimize_bandwidth(
dc_dmub_srv_p_state_delegate(dc,
true, context);
context->bw_ctx.bw.dcn.clk.p_state_change_support = true;
dc->clk_mgr->clks.fw_based_mclk_switching = true;
} else {
dc->clk_mgr->clks.fw_based_mclk_switching = false;
}
dc->clk_mgr->funcs->update_clocks(
......
......@@ -985,7 +985,11 @@ void dcn30_set_disp_pattern_generator(const struct dc *dc,
void dcn30_prepare_bandwidth(struct dc *dc,
struct dc_state *context)
{
if (context->bw_ctx.bw.dcn.clk.fw_based_mclk_switching) {
bool p_state_change_support = context->bw_ctx.bw.dcn.clk.p_state_change_support;
/* Any transition into an FPO config should disable MCLK switching first to avoid
* driver and FW P-State synchronization issues.
*/
if (context->bw_ctx.bw.dcn.clk.fw_based_mclk_switching || dc->clk_mgr->clks.fw_based_mclk_switching) {
dc->optimized_required = true;
context->bw_ctx.bw.dcn.clk.p_state_change_support = false;
}
......@@ -996,7 +1000,19 @@ void dcn30_prepare_bandwidth(struct dc *dc,
dc->clk_mgr->funcs->set_max_memclk(dc->clk_mgr, dc->clk_mgr->bw_params->clk_table.entries[dc->clk_mgr->bw_params->clk_table.num_entries - 1].memclk_mhz);
dcn20_prepare_bandwidth(dc, context);
/*
* enabled -> enabled: do not disable
* enabled -> disabled: disable
* disabled -> enabled: don't care
* disabled -> disabled: don't care
*/
if (!context->bw_ctx.bw.dcn.clk.fw_based_mclk_switching)
dc_dmub_srv_p_state_delegate(dc, false, context);
if (context->bw_ctx.bw.dcn.clk.fw_based_mclk_switching || dc->clk_mgr->clks.fw_based_mclk_switching) {
/* After disabling P-State, restore the original value to ensure we get the correct P-State
* on the next optimize. */
context->bw_ctx.bw.dcn.clk.p_state_change_support = p_state_change_support;
}
}
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