#!/usr/bin/env bash
# SPDX-License-Identifier: (GPL-2.0-only OR MIT)
# Copyright (C) 2026 Amlogic, Inc. All rights reserved
#
# Environment configuration functions for AMLbian
## Force-regenerate /boot/initrd.img-<ver> with the Amlogic-specific module
## set so eMMC actually probes during boot.
##
## Why this exists:
##   linux-image deb's postinst calls update-initramfs with default
##   MODULES=dep, which only packs modules detected from the build host's
##   running kernel. In a chroot the build kernel is unrelated to the target,
##   so the resulting initramfs has NO pinctrl/clk/mmc drivers → kernel boots,
##   sees deferred probe forever ("wait for supplier .../pinctrl@4000"),
##   never mounts root.
##
## This helper:
##   1. Sets MODULES=most (so initramfs-tools scans the kernel-image deb's
##      modules tree, not the host running kernel).
##   2. Writes /etc/initramfs-tools/modules with the explicit chain needed
##      to bring up SCMI clock → pinctrl → eMMC.
##   3. Drops a init-premount script that modprobes them in fixed order
##      (clk_scmi MUST be first — DT has &scmi_clk as parent of
##      amlogic,general-clk, so without clk_scmi the clk node never resolves
##      and every subsequent driver hangs in deferred probe).
##   4. Re-runs `update-initramfs -c -k <kver>` inside chroot.
##
## Only invoked from build_rootfs when GPT has a boot partition (A9 family).

function force_initramfs_with_amlogic_modules() {
	# A9: amlogic-* drivers live in common_drivers/ which MODULES=most doesn't
	# scan. Explicit list ensures they go into postinst-generated initramfs.

    echo "=========================initramfs module start==================================="
    mkdir -p ${ROOTFS_TEMP}/usr/local/amlramfs
    export LOCAL_RAMFS=${ROOTFS_TEMP}/usr/local/amlramfs

    cp ${AMLBIAN_DIR}/patches/ramfs/init ${LOCAL_RAMFS}
    chmod +x ${LOCAL_RAMFS}/init

    cp ${AMLBIAN_DIR}/patches/ramfs/hook ${ROOTFS_TEMP}/etc/initramfs-tools/hooks/amlhook
    chmod +x ${ROOTFS_TEMP}/etc/initramfs-tools/hooks/amlhook

    echo "=========================initramfs module end==================================="
}

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# End of function-initrd.sh
# ==============================================================================