[PATCH] drm/amd/display: Tune min clk values for MPO for RV

[Pratik Vishwakarma]

[Why]
Incorrect values were resulting in flash lines
when MPO was enabled and system was left idle.

[How]
Increase min clk values only when MPO is enabled
and display is active to not affect S3 power.

Signed-off-by: Pratik Vishwakarma <Pratik.Vishwakarma at amd.com>
---
 .../display/dc/clk_mgr/dcn10/rv1_clk_mgr.c    | 35 +++++++++++++++++--
 1 file changed, 32 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn10/rv1_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn10/rv1_clk_mgr.c
index e133edc587d3..c388a003956b 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn10/rv1_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn10/rv1_clk_mgr.c
@@ -187,6 +187,22 @@ static void ramp_up_dispclk_with_dpp(
 	clk_mgr->base.clks.max_supported_dppclk_khz = new_clocks->max_supported_dppclk_khz;
 }
 
+static bool is_mpo_enabled(struct dc_state *context)
+{
+	int i;
+
+	for (i = 0; i < context->stream_count; i++) {
+		if (context->stream_status[i].plane_count > 1) {
+		/*
+		 * No need to check for all streams as MPO
+		 * can be enabled on single stream only for RV.
+		 */
+			return true;
+		}
+	}
+	return false;
+}
+
 static void rv1_update_clocks(struct clk_mgr *clk_mgr_base,
 			struct dc_state *context,
 			bool safe_to_lower)
@@ -284,9 +300,22 @@ static void rv1_update_clocks(struct clk_mgr *clk_mgr_base,
 		if (pp_smu->set_hard_min_fclk_by_freq &&
 				pp_smu->set_hard_min_dcfclk_by_freq &&
 				pp_smu->set_min_deep_sleep_dcfclk) {
-			pp_smu->set_hard_min_fclk_by_freq(&pp_smu->pp_smu, new_clocks->fclk_khz / 1000);
-			pp_smu->set_hard_min_dcfclk_by_freq(&pp_smu->pp_smu, new_clocks->dcfclk_khz / 1000);
-			pp_smu->set_min_deep_sleep_dcfclk(&pp_smu->pp_smu, (new_clocks->dcfclk_deep_sleep_khz + 999) / 1000);
+			// Only increase clocks when display is active and MPO is enabled
+			if (display_count && is_mpo_enabled(context)) {
+				pp_smu->set_hard_min_fclk_by_freq(&pp_smu->pp_smu,
+						((new_clocks->fclk_khz / 1000) *  101) / 100);
+				pp_smu->set_hard_min_dcfclk_by_freq(&pp_smu->pp_smu,
+						((new_clocks->dcfclk_khz / 1000) * 101) / 100);
+				pp_smu->set_min_deep_sleep_dcfclk(&pp_smu->pp_smu,
+						(new_clocks->dcfclk_deep_sleep_khz + 999) / 1000);
+			} else {
+				pp_smu->set_hard_min_fclk_by_freq(&pp_smu->pp_smu,
+						new_clocks->fclk_khz / 1000);
+				pp_smu->set_hard_min_dcfclk_by_freq(&pp_smu->pp_smu,
+						new_clocks->dcfclk_khz / 1000);
+				pp_smu->set_min_deep_sleep_dcfclk(&pp_smu->pp_smu,
+						(new_clocks->dcfclk_deep_sleep_khz + 999) / 1000);
+			}
 		}
 	}
 }
-- 
2.17.1