[openwrt/openwrt] arm-trusted-firmware-mediatek: add mt7988 4bg build

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/6141cd1dbc92ef1466d344decbf5332ccb805768

commit 6141cd1dbc92ef1466d344decbf5332ccb805768
Author: Frank Wunderlich <frank-w at public-files.de>
AuthorDate: Tue Jan 6 23:15:32 2026 +0100

    arm-trusted-firmware-mediatek: add mt7988 4bg build
    
    This allows builds for Bananapi R4 (Pro) with 8GB RAM.
    
    Signed-off-by: Frank Wunderlich <frank-w at public-files.de>
    Link: https://github.com/openwrt/openwrt/pull/21437
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 .../boot/arm-trusted-firmware-mediatek/Makefile    | 33 +++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/package/boot/arm-trusted-firmware-mediatek/Makefile b/package/boot/arm-trusted-firmware-mediatek/Makefile
index 43211f26c7..071741b6e2 100644
--- a/package/boot/arm-trusted-firmware-mediatek/Makefile
+++ b/package/boot/arm-trusted-firmware-mediatek/Makefile
@@ -645,6 +645,34 @@ define Trusted-Firmware-A/mt7988-spim-nand-ubi-ddr4
   USE_UBI:=1
 endef
 
+define Trusted-Firmware-A/mt7988-emmc-comb-4bg
+  NAME:=MediaTek MT7988 (eMMC, DDR4 8GB)
+  BOOT_DEVICE:=emmc
+  BUILD_SUBTARGET:=filogic
+  PLAT:=mt7988
+  DRAM_USE_COMB:=1
+  DDR4_4BG_MODE:=1
+endef
+
+define Trusted-Firmware-A/mt7988-sdmmc-comb-4bg
+  NAME:=MediaTek MT7988 (SD card, DDR4 8GB)
+  BOOT_DEVICE:=sdmmc
+  BUILD_SUBTARGET:=filogic
+  PLAT:=mt7988
+  DRAM_USE_COMB:=1
+  DDR4_4BG_MODE:=1
+endef
+
+define Trusted-Firmware-A/mt7988-spim-nand-ubi-comb-4bg
+  NAME:=MediaTek MT7988 (SPI-NAND via SPIM, UBI, DDR4 8GB)
+  BOOT_DEVICE:=spim-nand
+  BUILD_SUBTARGET:=filogic
+  PLAT:=mt7988
+  DRAM_USE_COMB:=1
+  DDR4_4BG_MODE:=1
+  USE_UBI:=1
+endef
+
 TFA_TARGETS:= \
 	mt7622-nor-1ddr \
 	mt7622-nor-2ddr \
@@ -716,7 +744,10 @@ TFA_TARGETS:= \
 	mt7988-snand-ubi-comb \
 	mt7988-spim-nand-comb \
 	mt7988-spim-nand-ubi-comb \
-	mt7988-spim-nand-ubi-ddr4
+	mt7988-spim-nand-ubi-ddr4 \
+	mt7988-emmc-comb-4bg \
+	mt7988-sdmmc-comb-4bg \
+	mt7988-spim-nand-ubi-comb-4bg
 
 TFA_MAKE_FLAGS += \
 	BOOT_DEVICE=$(BOOT_DEVICE) \