T113 sdNand启动经常在跑到根文件系统时挂掉，可能是什么原因？

[suitjune]

根文件系统是ext4,电源查了也正常，经常启动时跑到根文件系统就打印下面错误，有时再断电上电自己就好了，请问可能什么原因？换ext3?感觉像是软件问题。

[ 15.443822] sun8iw20-pinctrl pio: pin-131 (5800800.vind) status -22
[ 15.450873] sun8iw20-pinctrl pio: could not request pin 131 (PE3) from group PE3 on device pio
[ 15.460660] sunxi-vin-media 5800800.vind: Error applying setting, reverse things back
[ 15.469515] [VIN_ERR]mclk0 request pin handle failed!
[ 15.475627] [VIN_ERR]registering n5, No such device!
[ 15.523436] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[ 15.545155] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[ 15.558190] clk: Not disabling unused clocks
[ 15.558236] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[ 15.563014] ALSA device list:
[ 15.572679] cfg80211: failed to load regulatory.db
[ 15.581538] #0: audiocodec
[ 15.584805] alloc_fd: slot 0 not NULL!
[ 15.589509] VFS: Cannot open root device "mmcblk0p5" or unknown-block(0,0): error -6
[ 15.598216] Please append a correct "root=" boot option; here are the available partitions:
[ 15.607620] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 15.616893] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.4.61+ #5
[ 15.623627] Hardware name: Generic DT based system
[ 15.629021] [<c010e2f8>] (unwind_backtrace) from [<c010a8bc>] (show_stack+0x10/0x14)
[ 15.637712] [<c010a8bc>] (show_stack) from [<c0720a90>] (dump_stack+0x7c/0x98)
[ 15.645820] [<c0720a90>] (dump_stack) from [<c0119808>] (panic+0x104/0x3dc)
[ 15.653637] [<c0119808>] (panic) from [<c0b01294>] (mount_block_root+0x278/0x32c)
[ 15.662035] [<c0b01294>] (mount_block_root) from [<c0b014e4>] (prepare_namespace+0x118/0x178)
[ 15.671603] [<c0b014e4>] (prepare_namespace) from [<c073513c>] (kernel_init+0x8/0x118)
[ 15.680487] [<c073513c>] (kernel_init) from [<c01010e8>] (ret_from_fork+0x14/0x2c)
[ 15.688975] Exception stack(0xc6817fb0 to 0xc6817ff8)
[ 15.694639] 7fa0: 00000000 00000000 00000000 00000000
[ 15.703812] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 15.712984] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 15.720412] CPU1: stopping
[ 15.723448] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.61+ #5
[ 15.730182] Hardware name: Generic DT based system
[ 15.735560] [<c010e2f8>] (unwind_backtrace) from [<c010a8bc>] (show_stack+0x10/0x14)
[ 15.744248] [<c010a8bc>] (show_stack) from [<c0720a90>] (dump_stack+0x7c/0x98)
[ 15.752351] [<c0720a90>] (dump_stack) from [<c010c6b0>] (handle_IPI+0xc0/0x168)
[ 15.760554] [<c010c6b0>] (handle_IPI) from [<c036bf14>] (gic_handle_irq+0x70/0x78)
[ 15.769048] [<c036bf14>] (gic_handle_irq) from [<c01021cc>] (__irq_svc+0x6c/0xa8)
[ 15.777438] Exception stack(0xc6841f80 to 0xc6841fc8)
[ 15.783104] 1f80: 00000d2c c6ec4534 00000000 c0114d20 00000002 c6840000 c0c03de8 c0c03e24
[ 15.792278] 1fa0: 4000406a 410fc075 00000000 00000000 c0c718b0 c6841fd0 c0107fb8 c0107fbc
[ 15.801448] 1fc0: 60000113 ffffffff
[ 15.805363] [<c01021cc>] (__irq_svc) from [<c0107fbc>] (arch_cpu_idle+0x2c/0x38)
[ 15.813663] [<c0107fbc>] (arch_cpu_idle) from [<c013e3d0>] (do_idle+0xb8/0x120)
[ 15.821864] [<c013e3d0>] (do_idle) from [<c013e6d4>] (cpu_startup_entry+0x18/0x1c)
[ 15.830356] [<c013e6d4>] (cpu_startup_entry) from [<40102c0c>] (0x40102c0c)
[ 15.838177] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ]---

[YuzukiTsuru]

1. 检查 m kermel_menuconfig 有没有打开ext4相关驱动
2. 检查mmcblk对应的rootfs分区是否正确
3. 检查是否存在 cd 检测脚监测失败的情况（比较有可能
4. 检查是否为sdc2，sdc2需要修改dtsi才可以驱动mmc设备

[suitjune]

@yuzukitsuru 我看下，谢谢~