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Starting Kernel ....hang issue in i.MX6 solo based Custom board

Question asked by Anjalik Krishna on May 17, 2017
Latest reply on Jul 3, 2017 by Anjalik Krishna

Hi All,

   I am working on Android Lollipop 5.0.0 . And the issue which I am currently facing is a hang issue once the u-boot is completely booted up in my custom board. I am not getting any prints after "Starting Kernel.." . My custom board uses 1GB DDR. Suspecting the issue might be of DDR, a DDR stress test and calibration have been done successfully. But even after editing the plugin.S file with new calibrated co-efficients the hang issue could not be solved. The below boot argument

was used in booting Android Lollipop in i.MX6 Solo board with 512 MB DDR.


setenv bootargs_msd 'setenv bootargs ${bootargs_base} video=mxcfb0:dev=ldb,bpp=24 video=mxcfb1:dev=hdmi,1920x1080M@60,if=RGB24,bpp=24 fbmem=28M root=/dev/mmcblk1p2 calibration rootwait rw rootfstype=ext4 init=/init androidboot.console=ttymxc1 consoleblank=0 vmalloc=400M cma=198M androidboot.hardware=freescale androidboot.selinux=disabled androidboot.dm_verity=disabled' .


The vmalloc and cma value will be changed if I used DDR of 1GB or can I use the same boot arguments?


Else how can I calculate the vmalloc and cma parameter values for 1GB of DDR?


Or any other reasons for the Hang issue which I can probe into?


Suggestions will be appreciated.