From: Yongqiang Sun <yongqiang.sun@amd.com>
Date: Wed, 4 Apr 2018 17:27:18 -0400
Subject: drm/amd/display: Check lid state to determine fast boot optimization.
Git-commit: 339cc82ae67700cb25a5bb10842cca5b09a79afe
Patch-mainline: v4.18-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

For legacy enable boot up with lid closed, eDP information couldn't be
read correctly via SBIOS_SCRATCH_3 results in eDP cannot be light up
properly when open lid.
Check lid state instead can resolve the issue.

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Eric Yang <eric.yang2@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/dc_stream.h                  |    1 
 drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c |   24 ++++++++----
 2 files changed, 17 insertions(+), 8 deletions(-)

--- a/drivers/gpu/drm/amd/display/dc/dc_stream.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h
@@ -92,6 +92,7 @@ struct dc_stream_state {
 	int phy_pix_clk;
 	enum signal_type signal;
 	bool dpms_off;
+	bool lid_state_closed;
 
 	struct dc_stream_status status;
 
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -1471,6 +1471,17 @@ static void disable_vga_and_power_gate_a
 	}
 }
 
+static bool is_eDP_lid_closed(struct dc_state *context)
+{
+	int i;
+
+	for (i = 0; i < context->stream_count; i++) {
+		if (context->streams[i]->signal == SIGNAL_TYPE_EDP)
+			return context->streams[i]->lid_state_closed;
+	}
+	return false;
+}
+
 static struct dc_link *get_link_for_edp_not_in_use(
 		struct dc *dc,
 		struct dc_state *context)
@@ -1505,20 +1516,17 @@ static struct dc_link *get_link_for_edp_
  */
 void dce110_enable_accelerated_mode(struct dc *dc, struct dc_state *context)
 {
-	struct dc_bios *dcb = dc->ctx->dc_bios;
-
-	/* vbios already light up eDP, so we can leverage vbios and skip eDP
+	/* check eDP lid state:
+	 * If lid is open, vbios already light up eDP, so we can leverage vbios and skip eDP
 	 * programming
 	 */
-	bool can_eDP_fast_boot_optimize =
-			(dcb->funcs->get_vga_enabled_displays(dc->ctx->dc_bios) == ATOM_DISPLAY_LCD1_ACTIVE);
-
-	/* if OS doesn't light up eDP and eDP link is available, we want to disable */
+	bool lid_state_closed = is_eDP_lid_closed(context);
 	struct dc_link *edp_link_to_turnoff = NULL;
 
-	if (can_eDP_fast_boot_optimize) {
+	if (!lid_state_closed) {
 		edp_link_to_turnoff = get_link_for_edp_not_in_use(dc, context);
 
+		/* if OS doesn't light up eDP and eDP link is available, we want to disable */
 		if (!edp_link_to_turnoff)
 			dc->apply_edp_fast_boot_optimization = true;
 	}