I just tried to enable in menuconfig
filesystem → The Extended 4 (ext4) filesystem
After that recompile the yocto image, now I can see:
root@swi-mdm9x28-wp:~# cat /proc/filesystems
nodev sysfs
nodev rootfs
nodev ramfs
nodev bdev
nodev proc
nodev cgroup
nodev cpuset
nodev tmpfs
nodev devtmpfs
nodev debugfs
nodev securityfs
nodev sockfs
nodev pipefs
nodev rpc_pipefs
nodev configfs
nodev devpts
ext3
ext2
ext4
squashfs
vfat
nodev nfs
nodev nfs4
nodev overlay
nodev mqueue
nodev smackfs
nodev mtd_inodefs
nodev ubifs
nodev functionfs
root@swi-mdm9x28-wp:~# cat /etc/filesystems
ext4
ext3
ext2
vfat
fat
btrfs
minix
*
root@swi-mdm9x28-wp:~# cm info
Device: WP7607-1
IMEI: 359780080500170
IMEISV: 6
FSN: V2842570321010
Firmware Version: SWI9X07Y_02.28.03.03 000000 jenki[ 241.643193] i2c-msm-v2 78b8000.i2c: NACK: slave not responding, ensure its powered: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv_addr:0x3a MSTR_STS:0x0c1300c8 OPER:0x00000090
ns 2019/05/21 03:33:04
Bootloader Version: SWI9X07Y_[ 241.662671] i2c-msm-v2 78b8000.i2c: NACK: slave not responding, ensure its powered: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv_addr:0x3a MSTR_STS:0x0c1300c8 OPER:0x00000090
02.28.03.03 000000 jenkins 2019/05/21 03:33:04
MCU Version: 002.011
PRI Part Number (PN): 9908645
PRI Revision: 001.001
Carrier PRI Name: GENERIC
Carrier PRI Revision: 002.068_000
SKU: 1104186
Last Reset Cause: Reset, User Requested
Resets Count: Expected: 148 Unexpected: 0
root@swi-mdm9x28-wp:~#