关于打印启动日志到/dev/fb0的问题

mysteryli LV 7

请问下大家 V851S移植了一块SPI屏幕并生成/dev/fb0 目前都正常，想把linux启动日志打印到上面，要怎么修改呢
记得之前V3S可以修改SD卡中的bootargs，现在用的nand不会了

awwwwa LV 8

找到 env.cfg


#kernel command arguments
earlyprintk=sunxi-uart,0x02500000
initcall_debug=0
console=ttyS0,115200
consolefb=tty0
nand_root=ubi0_4
mmc_root=/dev/mmcblk0p4
nor_root=/dev/mtdblock1
init=/init
loglevel=8
coherent_pool=16K
#reserve_list=30M@64M,78M@128M,200M@512M
mac=
wifi_mac=
bt_mac=
specialstr=
root_partition=rootfs
mtd_name=sys
rootfstype=ubifs, rw
#set kernel cmdline if boot.img or recovery.img has no cmdline we will use this
setargs_nor=setenv bootargs  earlyprintk=${earlyprintk} clk_ignore_unused initcall_debug=${initcall_debug} console=${console} console=${console—fb} loglevel=${loglevel} root=${nor_root} rootwait init=${init} rdinit=${rdinit} partitions=${partitions} cma=${cma} coherent_pool=${coherent_pool} ion_carveout_list=${reserve_list}
setargs_nand=setenv bootargs earlyprintk=${earlyprintk} clk_ignore_unused initcall_debug=${initcall_debug} console=${console} console=${console—fb} loglevel=${loglevel}  ubi.mtd=${mtd_name} root=${nand_root} rootfstype=${rootfstype} rootwait init=${init} rdinit=${rdinit} partitions=${partitions} cma=${cma} mac_addr=${mac} wifi_mac=${wifi_mac} bt_mac=${bt_mac} selinux=${selinux} specialstr=${specialstr} coherent_pool=${coherent_pool} ion_carveout_list=${reserve_list}
setargs_nand_ubi=setenv bootargs ubi.mtd=${mtd_name} earlyprintk=${earlyprintk} clk_ignore_unused initcall_debug=${initcall_debug} console=${console} console=${console—fb} loglevel=${loglevel} root=${nand_root} rootfstype=${rootfstype} init=${init} partitions=${partitions} cma=${cma} snum=${snum} mac_addr=${mac} wifi_mac=${wifi_mac} bt_mac=${bt_mac} specialstr=${specialstr} gpt=1
setargs_mmc=setenv  bootargs earlyprintk=${earlyprintk} clk_ignore_unused initcall_debug=${initcall_debug} console=${console} console=${console—fb} loglevel=${loglevel} root=${mmc_root}  rootwait init=${init} partitions=${partitions} cma=${cma} mac_addr=${mac} wifi_mac=${wifi_mac} bt_mac=${bt_mac} selinux=${selinux} specialstr=${specialstr} coherent_pool=${coherent_pool} ion_carveout_list=${reserve_list}
#nand command syntax: sunxi_flash read address partition_name read_bytes
#0x4007f800 = 0x40080000(kernel entry) - 0x800(boot.img header 2k)
boot_partition=boot
boot_normal=sunxi_flash read 44800000 ${boot_partition};bootm 44800000
boot_recovery=sunxi_flash read 44800000 extend;bootm 44800000
boot_fastboot=fastboot
#recovery key
recovery_key_value_max=0x13
recovery_key_value_min=0x10
#fastboot key
fastboot_key_value_max=0x8
fastboot_key_value_min=0x2

#uboot system env config
bootdelay=1
#default bootcmd, will change at runtime according to key press
bootcmd=run setargs_nand boot_normal#default nand boot
#verify the kernel
verify=N

mysteryli LV 7

好像不行

zjh18438444840 LV 2

@mysteryli 你好，你是怎么生成fb0的啊？方便说一下吗？