Hi All,
We are working on a DM355 processor based Development board.
The Board has 256MB mDDR RAM and 5MP image sensor MT9P031.
We are using the kernel version 2.6.10
We have modified the driver code for capturing 5MP raw image
and converting this 5MP raw into YUV. For this 5MP image capturing , we
have reserved 30MB.
We have allocated 56MB to the CMEM driver.
The reserved memory 30MB and the 56MB memory for CMEM are
at top of the RAM.
We are passing the remaining memory size to the kernel in
bootargs as mem=170M. And we are using the NFS rootfilesystem.
But we are getting kernel hanging issues while testing the
IPNC_APP applications and 5MP still image capturing. Sometimes the
kernel is hanging while booting itself.
If we reserve the 30MB from the address region 0x83200000 -
0x84FFFFFF and pass the memory size to kernel in bootargs as mem=50M,
then we are NOT having any issues in running the applications. But we
want to use the exact remaining memory.
And also we are not able to program the NAND flash memory in
kernel level if we are not passing the mem=50M in bootargs.
What could be the cause for this kernel hanging issue ?
Are we missing any configurations while building the kernel
image ?
Our Bootargs is :
mem=50M console=ttyS1,115200n8 root=/dev/nfs rootwait rw
ip=192.168.1.90:192.168.1.99:192.168.1.1:255.255.255.0
nfsroot=192.168.1.99:/tftpboot/bellatrix_rootfilesystem,nolock
eth=00:0C:0C:A0:01:FE v4l2_video_capture=:device=MT9P031
Regards,
Tharmarajan G
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