1 files changed, 18 insertions, 13 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
index 3ac6c7b65a45..4c230f1de9a3 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -939,12 +939,15 @@ void dce110_edp_backlight_control(
 		return;
 	}
 
-	if (enable && link->panel_cntl &&
-		link->panel_cntl->funcs->is_panel_backlight_on(link->panel_cntl)) {
-		DC_LOG_HW_RESUME_S3(
-				"%s: panel already powered up. Do nothing.\n",
+	if (link->panel_cntl) {
+		bool is_backlight_on = link->panel_cntl->funcs->is_panel_backlight_on(link->panel_cntl);
+
+		if ((enable && is_backlight_on) || (!enable && !is_backlight_on)) {
+			DC_LOG_HW_RESUME_S3(
+				"%s: panel already powered up/off. Do nothing.\n",
 				__func__);
-		return;
+			return;
+		}
 	}
 
 	/* Send VBIOS command to control eDP panel backlight */
@@ -992,8 +995,6 @@ void dce110_edp_backlight_control(
 
 	link_transmitter_control(ctx->dc_bios, &cntl);
 
-
-
 	if (enable && link->dpcd_sink_ext_caps.bits.oled)
 		msleep(OLED_POST_T7_DELAY);
 
@@ -1004,7 +1005,7 @@ void dce110_edp_backlight_control(
 
 	/*edp 1.2*/
 	if (cntl.action == TRANSMITTER_CONTROL_BACKLIGHT_OFF)
-		edp_receiver_ready_T9(link);
+		edp_add_delay_for_T9(link);
 
 	if (!enable && link->dpcd_sink_ext_caps.bits.oled)
 		msleep(OLED_PRE_T11_DELAY);
@@ -1145,12 +1146,14 @@ void dce110_blank_stream(struct pipe_ctx *pipe_ctx)
 	if (dc_is_dp_signal(pipe_ctx->stream->signal)) {
 		pipe_ctx->stream_res.stream_enc->funcs->dp_blank(pipe_ctx->stream_res.stream_enc);
 
-		/*
-		 * After output is idle pattern some sinks need time to recognize the stream
-		 * has changed or they enter protection state and hang.
-		 */
-		if (!dc_is_embedded_signal(pipe_ctx->stream->signal))
+		if (!dc_is_embedded_signal(pipe_ctx->stream->signal)) {
+			/*
+			 * After output is idle pattern some sinks need time to recognize the stream
+			 * has changed or they enter protection state and hang.
+			 */
 			msleep(60);
+		} else if (pipe_ctx->stream->signal == SIGNAL_TYPE_EDP)
+			edp_receiver_ready_T9(link);
 	}
 
 }
@@ -1527,6 +1530,8 @@ static void power_down_encoders(struct dc *dc)
 				dc->links[i]->link_enc, signal);
 
 		dc->links[i]->link_status.link_active = false;
+		memset(&dc->links[i]->cur_link_settings, 0,
+				sizeof(dc->links[i]->cur_link_settings));
 	}
 }