drm/amd/display: Use dig enable to determine fast boot optimization.

Linux doesn't know lid state, better to check dig enable
value from register.

Signed-off-by: Yongqiang Sun <yongqiang.sun@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>

drivers/gpu/drm/amd/display/dc/dc_stream.h

@@ -92,7 +92,6 @@ struct dc_stream_state {
 	int phy_pix_clk;
 	enum signal_type signal;
 	bool dpms_off;
-	bool lid_state_closed;
 
 	struct dc_stream_status status;
 

drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c

@@ -113,6 +113,7 @@ static const struct link_encoder_funcs dce110_lnk_enc_funcs = {
 	.connect_dig_be_to_fe = dce110_link_encoder_connect_dig_be_to_fe,
 	.enable_hpd = dce110_link_encoder_enable_hpd,
 	.disable_hpd = dce110_link_encoder_disable_hpd,
+	.is_dig_enabled = dce110_is_dig_enabled,
 	.destroy = dce110_link_encoder_destroy
 };
 
@@ -535,8 +536,9 @@ void dce110_psr_program_secondary_packet(struct link_encoder *enc,
 		DP_SEC_GSP0_PRIORITY, 1);
 }
 
-static bool is_dig_enabled(const struct dce110_link_encoder *enc110)
+bool dce110_is_dig_enabled(struct link_encoder *enc)
 {
+	struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);
 	uint32_t value;
 
 	REG_GET(DIG_BE_EN_CNTL, DIG_ENABLE, &value);
@@ -1031,7 +1033,7 @@ void dce110_link_encoder_disable_output(
 	struct bp_transmitter_control cntl = { 0 };
 	enum bp_result result;
 
-	if (!is_dig_enabled(enc110)) {
+	if (!dce110_is_dig_enabled(enc)) {
 		/* OF_SKIP_POWER_DOWN_INACTIVE_ENCODER */
 		return;
 	}

drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.h

@@ -263,4 +263,6 @@ void dce110_psr_program_dp_dphy_fast_training(struct link_encoder *enc,
 void dce110_psr_program_secondary_packet(struct link_encoder *enc,
 			unsigned int sdp_transmit_line_num_deadline);
 
+bool dce110_is_dig_enabled(struct link_encoder *enc);
+
 #endif /* __DC_LINK_ENCODER__DCE110_H__ */

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

@@ -1471,15 +1471,15 @@ static void disable_vga_and_power_gate_all_controllers(
 	}
 }
 
-static bool is_eDP_lid_closed(struct dc_state *context)
+static struct dc_link *get_link_for_edp(struct dc *dc)
 {
 	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;
+	for (i = 0; i < dc->link_count; i++) {
+		if (dc->links[i]->connector_signal == SIGNAL_TYPE_EDP)
+			return dc->links[i];
 	}
-	return false;
+	return NULL;
 }
 
 static struct dc_link *get_link_for_edp_not_in_use(
@@ -1516,41 +1516,22 @@ static struct dc_link *get_link_for_edp_not_in_use(
  */
 void dce110_enable_accelerated_mode(struct dc *dc, struct dc_state *context)
 {
-	/* check eDP lid state and BIOS_SCRATCH_3 to determine fast boot optimization
-	 * UEFI boot
-	 *				edp_active_status_from_scratch		fast boot optimization
-	 * S4/S5 resume:
-	 * Lid Open		true								true
-	 * Lid Close	false								false
-	 *
-	 * S3/ resume:
-	 * Lid Open		false								false
-	 * Lid Close	false								false
-	 *
-	 * Legacy boot:
-	 *				edp_active_status_from_scratch		fast boot optimization
-	 * S4/S resume:
-	 * Lid Open		true								true
-	 * Lid Close	true								false
-	 *
-	 * S3/ resume:
-	 * Lid Open		false								false
-	 * Lid Close	false								false
-	 */
-	struct dc_bios *dcb = dc->ctx->dc_bios;
-	bool lid_state_closed = is_eDP_lid_closed(context);
 	struct dc_link *edp_link_to_turnoff = NULL;
-	bool edp_active_status_from_scratch =
-			(dcb->funcs->get_vga_enabled_displays(dc->ctx->dc_bios) == ATOM_DISPLAY_LCD1_ACTIVE);
+	struct dc_link *edp_link = get_link_for_edp(dc);
+	bool can_eDP_fast_boot_optimize = false;
+
+	if (edp_link) {
+		can_eDP_fast_boot_optimize =
+				edp_link->link_enc->funcs->is_dig_enabled(edp_link->link_enc);
+	}
 
-	/*Lid open*/
-	if (!lid_state_closed) {
+	if (can_eDP_fast_boot_optimize) {
 		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 resume from S4/S5, should optimization.
 		 */
-		if (!edp_link_to_turnoff && edp_active_status_from_scratch)
+		if (!edp_link_to_turnoff)
 			dc->apply_edp_fast_boot_optimization = true;
 	}
 

drivers/gpu/drm/amd/display/dc/inc/hw/link_encoder.h

@@ -149,6 +149,7 @@ struct link_encoder_funcs {
 		bool connect);
 	void (*enable_hpd)(struct link_encoder *enc);
 	void (*disable_hpd)(struct link_encoder *enc);
+	bool (*is_dig_enabled)(struct link_encoder *enc);
 	void (*destroy)(struct link_encoder **enc);
 };