From: Hersen Wu <hersenxs.wu@amd.com>
Date: Fri, 27 Jul 2018 14:52:37 -0400
Subject: drm/amd/display: display connected to dp-1 does not light up
Git-commit: 1e1dbd6fd10031bf46d9e44b6ad423e2ee39e2a7
Patch-mainline: v4.19-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

[why]
for vega, dp set_panel_mode is
handled by psp firmware. dal should not program the
register again.

[how]
dal does not program panel mode.

Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/display/dc/dc.h                     |    1 +
 drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c   |    5 +++++
 drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c |    1 +
 3 files changed, 7 insertions(+)

--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -79,6 +79,7 @@ struct dc_caps {
 	bool post_blend_color_processing;
 	bool force_dp_tps4_for_cp2520;
 	bool disable_dp_clk_share;
+	bool psp_setup_panel_mode;
 };
 
 struct dc_dcc_surface_param {
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
@@ -256,6 +256,11 @@ static void setup_panel_mode(
 	enum dp_panel_mode panel_mode)
 {
 	uint32_t value;
+	struct dc_context *ctx = enc110->base.ctx;
+
+	/* if psp set panel mode, dal should be program it */
+	if (ctx->dc->caps.psp_setup_panel_mode)
+		return;
 
 	ASSERT(REG(DP_DPHY_INTERNAL_CTRL));
 	value = REG_READ(DP_DPHY_INTERNAL_CTRL);
--- a/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
@@ -883,6 +883,7 @@ static bool construct(
 	dc->caps.i2c_speed_in_khz = 100;
 	dc->caps.max_cursor_size = 128;
 	dc->caps.dual_link_dvi = true;
+	dc->caps.psp_setup_panel_mode = true;
 
 	dc->debug = debug_defaults;