drm/amd/display: Retiring set_display_requirements in dm_pp_smu.h - part2

[Why]
In DCN we want direct DAL to SMU calls, with as little as possible
interference by pplib. The reason for each pp_smu interface mapping to
1 SMU message is so we can have the sequencing of different SMU message
in dal and shared across different OS. This will also simplify
debugging as DAL owns this interaction and there's no confusion about
division of ownership.

[How]
Part 2: Separate set_min_deep_sleep_dcfclk message from the SMU
messages that are sent as part of dm_pp_apply_clock_for_voltage_request.
Directly notify min dcfclk to smu
Signed-off-by: Fatemeh Darbehani <fatemeh.darbehani@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dccg.c

@@ -178,6 +178,24 @@ static void notify_deep_sleep_dcfclk_to_smu(
 	pp_smu->set_min_deep_sleep_dcfclk(&pp_smu->pp_smu, min_dcef_deep_sleep_clk_mhz);
 }
 
+static void notify_hard_min_dcfclk_to_smu(
+		struct pp_smu_funcs_rv *pp_smu, int min_dcf_clk_khz)
+{
+	int min_dcf_clk_mhz; //minimum required DCF clock in mhz
+
+	/*
+	 * if function pointer not set up, this message is
+	 * sent as part of pplib_apply_display_requirements.
+	 * So just return.
+	 */
+	if (!pp_smu || !pp_smu->set_hard_min_dcfclk_by_freq)
+		return;
+
+	min_dcf_clk_mhz = min_dcf_clk_khz / 1000;
+
+	pp_smu->set_hard_min_dcfclk_by_freq(&pp_smu->pp_smu, min_dcf_clk_mhz);
+}
+
 static void dcn1_update_clocks(struct dccg *dccg,
 			struct dc_state *context,
 			bool safe_to_lower)
@@ -225,6 +243,7 @@ static void dcn1_update_clocks(struct dccg *dccg,
 		send_request_to_lower = true;
 	}
 
+	// F Clock
 	if (should_set_clock(safe_to_lower, new_clocks->fclk_khz, dccg->clks.fclk_khz)) {
 		dccg->clks.fclk_khz = new_clocks->fclk_khz;
 		clock_voltage_req.clk_type = DM_PP_CLOCK_TYPE_FCLK;
@@ -235,6 +254,7 @@ static void dcn1_update_clocks(struct dccg *dccg,
 		send_request_to_lower = true;
 	}
 
+	//DCF Clock
 	if (should_set_clock(safe_to_lower, new_clocks->dcfclk_khz, dccg->clks.dcfclk_khz)) {
 		dccg->clks.dcfclk_khz = new_clocks->dcfclk_khz;
 		smu_req.hard_min_dcefclk_khz = new_clocks->dcfclk_khz;
@@ -257,7 +277,9 @@ static void dcn1_update_clocks(struct dccg *dccg,
 		/*use dcfclk to request voltage*/
 		clock_voltage_req.clk_type = DM_PP_CLOCK_TYPE_DCFCLK;
 		clock_voltage_req.clocks_in_khz = dcn_find_dcfclk_suits_all(dc, new_clocks);
-		dm_pp_apply_clock_for_voltage_request(dccg->ctx, &clock_voltage_req);
+
+		notify_hard_min_dcfclk_to_smu(pp_smu, clock_voltage_req.clocks_in_khz);
+
 		if (pp_smu->set_display_requirement)
 			pp_smu->set_display_requirement(&pp_smu->pp_smu, &smu_req);
 
@@ -279,7 +301,9 @@ static void dcn1_update_clocks(struct dccg *dccg,
 		/*use dcfclk to request voltage*/
 		clock_voltage_req.clk_type = DM_PP_CLOCK_TYPE_DCFCLK;
 		clock_voltage_req.clocks_in_khz = dcn_find_dcfclk_suits_all(dc, new_clocks);
-		dm_pp_apply_clock_for_voltage_request(dccg->ctx, &clock_voltage_req);
+
+		notify_hard_min_dcfclk_to_smu(pp_smu, clock_voltage_req.clocks_in_khz);
+
 		if (pp_smu->set_display_requirement)
 			pp_smu->set_display_requirement(&pp_smu->pp_smu, &smu_req);
 

drivers/gpu/drm/amd/display/dc/dm_pp_smu.h

@@ -109,7 +109,7 @@ struct pp_smu_funcs_rv {
 	/* PPSMC_MSG_SetHardMinDcfclkByFreq
 	 * fixed clock at requested freq, either from FCH bypass or DFS
 	 */
-	void (*set_hard_min_dcfclk_by_freq)(struct pp_smu *pp, int khz);
+	void (*set_hard_min_dcfclk_by_freq)(struct pp_smu *pp, int mhz);
 
 	/* PPSMC_MSG_SetMinDeepSleepDcfclk
 	 * when DF is in cstate, dcf clock is further divided down
@@ -120,12 +120,12 @@ struct pp_smu_funcs_rv {
 	/* PPSMC_MSG_SetHardMinFclkByFreq
 	 * FCLK will vary with DPM, but never below requested hard min
 	 */
-	void (*set_hard_min_fclk_by_freq)(struct pp_smu *pp, int khz);
+	void (*set_hard_min_fclk_by_freq)(struct pp_smu *pp, int mhz);
 
 	/* PPSMC_MSG_SetHardMinSocclkByFreq
 	 * Needed for DWB support
 	 */
-	void (*set_hard_min_socclk_by_freq)(struct pp_smu *pp, int khz);
+	void (*set_hard_min_socclk_by_freq)(struct pp_smu *pp, int mhz);
 
 	/* PME w/a */
 	void (*set_pme_wa_enable)(struct pp_smu *pp);