Follow-up to OpenIPC/firmware#2410, which left MT7601U as the only in-tree USB
Wi-Fi stack on hi3518ev300. RTL8188EU lands here as a camera profile, splitting
the two adapters across the two repositories.
hi3518ev300_lite_generic-rtl8188eu builds the driver INTO the kernel rather than
shipping it as a module: a profile whose only Wi-Fi is that driver has no reason
to carry it as loadable code, and the rootfs is the partition under pressure.
The out-of-tree rtl8188eus-openipc cannot make that move -- it is an external
kernel-module package, never linked into vmlinux -- so this uses the in-tree
staging driver at CONFIG_R8188EU=y through a variant kernel config, the same
shape as gk7205v200.generic-otg.config.
Built in, the driver also has no modprobe problem: as a module it was
unreachable, because /etc/wireless/usb's rtl8188eu-generic profile modprobes
'8188eu' while the in-tree module is 'r8188eu'. Linked into the kernel it binds
off its own USB device table at boot.
CONFIG_R8188EU selects WIRELESS_EXT, so the wext ABI firmware#2410 dropped comes
back on this variant only. It requests rtlwifi/rtl8188eufw.bin, so
linux-firmware-openipc comes with it. Registered in .github/firmware-drift.json
against the firmware blob it derives from.
MEASURED in CI, against the module-based version of the same profile:
uImage [1873KB/2048KB] -> [1991KB/2048KB] 56KB free
rootfs.squashfs [5084KB/5120KB] -> [4728KB/5120KB] 392KB free
Also drops excludes entries firmware now handles upstream: r8188eu.ko from
xiaomi-mjsxj02hl, and r8188eu.ko + scsi_mod.ko + sd_mod.ko from
yuancam-dgk423403. Both cameras build green; both run out-of-tree Realtek
drivers over nl80211 and are otherwise unaffected.
Not tested on a camera. This changes which 8188EU driver is used -- mainline
staging rather than the Realtek vendor fork -- so it wants confirmation that a
dongle is detected at boot without a modprobe, associates, and streams.
The device is a YuanCam-branded (HQLS/hdwificam OEM) HI3518EV300 board —
confirmed on a lab unit via its Factory.bin/SysParam.bin tags
("YuanCamFactory"/"YuanCamSysparam") and its P2P device id
(DGK-423403-YZHGE). Rename the placeholder "Bathhouse" profile to a
proper vendor-model name and fill in the sensor, identified on hardware
with ipctool as JXH62 (previously "?" in the README table). The
defconfig, customizer.sh and excludes list carry over unchanged except
for the upgrade URL, which now points at the renamed release asset.
