drm/amd/display: solve regression in update phy state refactor

[Why]
There is a coding error when moving dp disable link phy to
hw sequencer, where the receiver power control is missed during
this refactor.

[how]
1. Add back missing receiver power control in disable link phy.
2. minor modifications to ensure there is no undesired sequence
changes in dp link enable/disable.
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

@@ -7073,9 +7073,9 @@ void dp_enable_link_phy(
 	enum clock_source_id clock_source,
 	const struct dc_link_settings *link_settings)
 {
+	link->cur_link_settings = *link_settings;
 	link->dc->hwss.enable_dp_link_output(link, link_res, signal,
 			clock_source, link_settings);
-	link->cur_link_settings = *link_settings;
 	dp_receiver_power_ctrl(link, true);
 }
 
@@ -7149,6 +7149,9 @@ void dp_disable_link_phy(struct dc_link *link, const struct link_resource *link_
 {
 	struct dc  *dc = link->ctx->dc;
 
+	if (!link->wa_flags.dp_keep_receiver_powered)
+		dp_receiver_power_ctrl(link, false);
+
 	dc->hwss.disable_link_output(link, link_res, signal);
 	/* Clear current link setting.*/
 	memset(&link->cur_link_settings, 0,

drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c

@@ -3098,6 +3098,7 @@ void dce110_enable_dp_link_output(
 	if (dmcu != NULL && dmcu->funcs->unlock_phy)
 		dmcu->funcs->unlock_phy(dmcu);
 
+	dp_source_sequence_trace(link, DPCD_SOURCE_SEQ_AFTER_ENABLE_LINK_PHY);
 }
 
 void dce110_disable_link_output(struct dc_link *link,
@@ -3111,7 +3112,7 @@ void dce110_disable_link_output(struct dc_link *link,
 	if (signal == SIGNAL_TYPE_EDP &&
 			link->dc->hwss.edp_backlight_control)
 		link->dc->hwss.edp_backlight_control(link, false);
-	else if (dc_is_dp_signal(signal) && dmcu != NULL && dmcu->funcs->lock_phy)
+	else if (dmcu != NULL && dmcu->funcs->lock_phy)
 		dmcu->funcs->lock_phy(dmcu);
 
 	link_hwss->disable_link_output(link, link_res, signal);
@@ -3120,8 +3121,9 @@ void dce110_disable_link_output(struct dc_link *link,
 	if (signal == SIGNAL_TYPE_EDP &&
 			link->dc->hwss.edp_backlight_control)
 		link->dc->hwss.edp_power_control(link, false);
-	else if (dc_is_dp_signal(signal) && dmcu != NULL && dmcu->funcs->lock_phy)
+	else if (dmcu != NULL && dmcu->funcs->lock_phy)
 		dmcu->funcs->unlock_phy(dmcu);
+	dp_source_sequence_trace(link, DPCD_SOURCE_SEQ_AFTER_DISABLE_LINK_PHY);
 }
 
 static const struct hw_sequencer_funcs dce110_funcs = {