Tool/software:
Hi:
My SDK version is 10.01.10.04.
We use jffs2 to mount some mtd, but when it mount ,it always show crc error.
The test cmd is:
mtd_debug erase /dev/mtd1 0x0 0x300000
mount -t jffs2 /dev/mtd1 /mnt
echo "1234" > /mnt/test.txt
umount /mnt
mount -t jffs2 /dev/mtd1 /mnt
when I dmesg, it show me crc error: Node header CRC failed at 0x360080(ffff,ffff,fff,ffff)
The code is in readinode.c jffs2_get_inode_nodes , it do u.hdr_crc check.
Then I add some debug log in jffs2 crc check and cqspi dma
I found when it read some place, the data after finishing dma is 0xFF.
I Also use logic analyzer to capture the data . The data nor flash send is right which is not 0xFF. And I dump the data on flash at the same offset it also not 0xFF
So the data on flash and send to soc is right, but sometimes after dma transfer , the data in buf will be 0xFF.
If I add read again , the buf which dma transfer will get the right data.
The log I upload is I add shows the log that I add read twice when do u.hdr_crc check.
But you can see when it read 0x330080 fisrt time, the data in jffs2 buffer is 0xFF. I also dump the data in buffer finish dma transfer is 0xFF.
But when read again ,it get the right data.
The configs for jffs2 in kernel is as follows:
CONFIG_JFFS2_FS=y
CONFIG_JFFS2_FS_DEBUG=0
#CONFIG_JFFS2_FS_WRITEBUFFER is not set
#CONFIG_JFFS2_FS_WBUF_VERIFY is not set
#CONFIG_JFFS2_SUMMARY is not set
CONFIG_JFFS2_FS_XATTR=y
CONFIG_JFFS2_COMPRESSION_OPTIONS=y
CONFIG_JFFS2_ZLIB=y
CONFIG_JFFS2_RTIME=y
Could you please help us check if these configs cause the issue?
Also, in dts, I found a value in the node of flash@0
cdns,read-delay = <2>；
Does this value cause the issue?
Or is there any other settings need to set in some registers?
Thanks.
