From: Aric Cyr <aric.cyr@xxxxxxx>
[Why]
When no displays are currently enabled, display driver should not
disallow PSTATE switching.
[How]
Allow PSTATE switching if either the active configuration supports it,
or there are no active displays.
Signed-off-by: Aric Cyr <aric.cyr@xxxxxxx>
Reviewed-by: Jun Lei <Jun.Lei@xxxxxxx>
Acked-by: Anson Jacob <anson.jacob@xxxxxxx>
---
.../gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c
index 5b466f440d67..ab98c259ef69 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c
@@ -251,6 +251,7 @@ static void dcn3_update_clocks(struct clk_mgr *clk_mgr_base,
struct dmcu *dmcu = clk_mgr_base->ctx->dc->res_pool->dmcu;
bool force_reset = false;
bool update_uclk = false;
+ bool p_state_change_support;
if (dc->work_arounds.skip_clock_update || !clk_mgr->smu_present)
return;
@@ -291,8 +292,9 @@ static void dcn3_update_clocks(struct clk_mgr *clk_mgr_base,
clk_mgr_base->clks.socclk_khz = new_clocks->socclk_khz;
clk_mgr_base->clks.prev_p_state_change_support = clk_mgr_base->clks.p_state_change_support;
- if (should_update_pstate_support(safe_to_lower, new_clocks->p_state_change_support, clk_mgr_base->clks.p_state_change_support)) {
- clk_mgr_base->clks.p_state_change_support = new_clocks->p_state_change_support;
+ p_state_change_support = new_clocks->p_state_change_support || (display_count == 0);
+ if (should_update_pstate_support(safe_to_lower, p_state_change_support, clk_mgr_base->clks.p_state_change_support)) {
+ clk_mgr_base->clks.p_state_change_support = p_state_change_support;
/* to disable P-State switching, set UCLK min = max */
if (!clk_mgr_base->clks.p_state_change_support)
--
2.25.1
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