Why is imx6dl board entering kernel panic on changing kernel command line?

[sujay1]

I'm using an imx6dl board with 1GB Ram and Android BSP

After running and updating register values after ddr calibration I flashed the new images but the board goes into panic and reboots.

this is the kernel command line

BOARD_KERNEL_CMDLINE := console=ttymxc0,115200 init=/init video=mxcfb0:dev=ldb,fbpix=RGB32,bpp=32 video=mxcfb1:off video=mxcfb2:off video=mxcfb3:off vmalloc=128M androidboot.console=ttymxc0 consoleblank=0 androidboot.hardware=freescale cma=448M galcore.contiguousSize=33554432 buildvariant=userdebug androidboot.selinux=permissive androidboot.dm_verity=disabled

when I change it to

BOARD_KERNEL_CMDLINE := console=ttymxc0,115200 init=/init video=mxcfb0:dev=ldb,fbpix=RGB32,bpp=32 video=mxcfb1:off video=mxcfb2:off video=mxcfb3:off vmalloc=128M androidboot.console=ttymxc0 consoleblank=0 androidboot.hardware=freescale cma=448M galcore.contiguousSize=33554432

the board boots but continuous prints are seen on the console.

is there anything else I need to change?

[joanxie]

why did you remove " buildvariant=userdebug androidboot.selinux=permissive androidboot.dm_verity=disabled"? 

[sujay1]

It was just a trial and error based discovery.

[joanxie]

how about the first command line? you can find the parameter meanings in the android user guide