From 5af56ddf92766c42402f00c9f21a04a72c8bf4a7 Mon Sep 17 00:00:00 2001
From: Yu-Ping Wu <yupingso@chromium.org>
Date: Thu, 15 Jan 2026 16:59:06 +0800
Subject: [PATCH] mb/google/skywalker: Implement lb_board() to pass
 LB_TAG_PANEL_POWEROFF

To allow payloads to run MIPI panel power-off commands, create a new
LB_TAG_PANEL_POWEROFF record and pass it to payloads.

BUG=b:474187570
TEST=emerge-jedi coreboot
BRANCH=skywalker

Change-Id: Ie11e1e78129188cc26d56764449fbafafa8fa316
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90768
Reviewed-by: Chen-Tsung Hsieh <chentsung@google.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Yidi Lin <yidilin@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
---
 src/mainboard/google/skywalker/mainboard.c | 24 ++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/mainboard/google/skywalker/mainboard.c b/src/mainboard/google/skywalker/mainboard.c
index a0a89fc215..a36e3fa7a2 100644
--- a/src/mainboard/google/skywalker/mainboard.c
+++ b/src/mainboard/google/skywalker/mainboard.c
@@ -1,6 +1,10 @@
 /* SPDX-License-Identifier: GPL-2.0-only OR MIT */
 
+#include <boot/coreboot_tables.h>
 #include <bootmode.h>
+#include <commonlib/coreboot_tables.h>
+#include <commonlib/helpers.h>
+#include <commonlib/mipi/cmd.h>
 #include <device/device.h>
 #include <device/mmio.h>
 #include <fw_config.h>
@@ -166,3 +170,23 @@ struct chip_operations mainboard_ops = {
 	.name = CONFIG_MAINBOARD_PART_NUMBER,
 	.enable_dev = mainboard_enable,
 };
+
+void lb_board(struct lb_header *header)
+{
+	const struct panel_serializable_data *mipi_data = mtk_get_mipi_panel_data();
+
+	if (!mipi_data)
+		return;
+
+	size_t cmd_len = mipi_panel_get_commands_len(mipi_data->poweroff);
+
+	if (!cmd_len)
+		return;
+
+	struct lb_panel_poweroff *panel_poweroff =
+		(struct lb_panel_poweroff *)lb_new_record(header);
+	panel_poweroff->tag = LB_TAG_PANEL_POWEROFF;
+	panel_poweroff->size = ALIGN_UP(sizeof(*panel_poweroff) + cmd_len,
+					LB_ENTRY_ALIGN);
+	memcpy(panel_poweroff->cmd, mipi_data->poweroff, cmd_len);
+}