From: Yue Hin Lau <Yuehin.Lau@amd.com>
Date: Tue, 19 Sep 2017 11:35:23 -0400
Subject: drm/amd/display: edp backlight regression fix
Git-commit: dbaed8037c6c606456c182f5fc327f9d405a7ffe
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Signed-off-by: Yue Hin Lau <Yuehin.Lau@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.h |    5 +++++
 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c   |    1 +
 2 files changed, 6 insertions(+)

--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.h
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.h
@@ -68,5 +68,10 @@ void dce110_fill_display_configs(
 uint32_t dce110_get_min_vblank_time_us(const struct dc_state *context);
 
 void dp_receiver_power_ctrl(struct dc_link *link, bool on);
+
+void hwss_blacklight_control(
+	struct dc_link *link,
+	bool enable);
+
 #endif /* __DC_HWSS_DCE110_H__ */
 
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -2897,6 +2897,7 @@ static const struct hw_sequencer_funcs d
 	.wait_for_mpcc_disconnect = dcn10_wait_for_mpcc_disconnect,
 	.ready_shared_resources = ready_shared_resources,
 	.optimize_shared_resources = optimize_shared_resources,
+	.backlight_control = hwss_blacklight_control
 };