topic Re: No output to screen in i.MX Processors

No output to screen

jonathansmyth — Tue, 21 Apr 2015 09:30:09 GMT

hi guys!!

So im porting JB4.3 to custom board with imx6 soc, I've flashed the images to SD card and trying to boot from there...however it doesn't output anything to the screen...

here is my printenv...

MX6 F+S U-Boot > printenv

bootdelay=3

baudrate=115200

netmask=255.0.0.0

loadaddr=0x10800000

rd_loadaddr=0x11000000

netdev=eth0

ethprime=FEC0

fastboot_dev=mmc2

bootcmd_android=booti mmc2

splashimage=0x30000000

splashpos=m,m

lvds_num=1

uboot=u-boot.bin

kernel=uImage

nfsroot=/nfsroot

mtdparts=mtdparts=gpmi-nand:512k(NBoot)ro,2m(UBoot)ro,256k(UBootEnv),256k(UserDef),6m(Kernel)ro,-(TargetFS)

bootargs_nfs=setenv bootargs ${bootargs} fec_mac=${ethaddr} root=/dev/nfs ip=${ipaddr} nfsroot=${serverip}:${nfsroot},v3,tcp

bootargs_nand=setenv bootargs ${bootargs} fec_mac=${ethaddr} ${mtdparts} gpmi_debug_init enable_wait_mode=off ubi.mtd=TargetFS root=ubi0:rootfs rootfstype=ubifs rootwait rw

bootargs_mmc=setenv bootargs ${bootargs} fec_mac=${ethaddr} root=/dev/mmcblk0p1 rootfstype=ext4 rootwait rw

bootcmd_net=run bootargs_nfs;tftpboot ${loadaddr} ${kernel}; bootm

bootcmd_net_mmc=run bootargs_mmc;tftpboot ${loadaddr} ${kernel}; bootm

bootcmd_mmc= for disk in 0 1 ; do mmc dev ${disk} ;for fs in fat ext2 ; do ${fs}load mmc ${disk}:1 ${loadaddr} /6q_bootscript && source ${loadaddr} ; done ; done

bootcmd_nand=run bootargs_nand;nand read ${loadaddr} Kernel 0x600000;bootm

loadcmd_nfs=nfs ${loadaddr} ${serverip}:/nfsroot/uImage

clearenv=sf probe 1 && sf erase 0xc0000 0x2000 && echo restored environment to factory default

upgradeu=for disk in 0 1 ; do mmc dev ${disk} ;for fs in fat ext2 ; do ${fs}load mmc ${disk}:1 ${loadaddr} /6q_upgrade && source ${loadaddr} ; done ; done

ethact=FEC0

serverip=10.0.0.92

ipaddr=10.0.0.251

ethaddr=00:05:00:08:ED:CO

mtdids=nand0=gpmi-nand

partition=nand0,0

mtddevnum=0

mtddevname=NBoot

bootcmd=run bootcmd_nand_mmc

bootcmd_nand_mmc=run bootargs_mmc;nand read ${loadaddr} Kernel 0x600000;booti $loadaddr

bootargs=console=ttymxc3,115200 init=/init video=mxcfb0:dev=ldb,bpp=32 video=mxcfb1:off video=mxcfb2:off fbmem=10M vmalloc=400M androidboot.console=ttymxc3 androidboot.hardware=freescale

stdin=serial

stdout=serial

stderr=serial

and when i boot this is the output message in file bootOutput

it just stops and the screen remains blank..

Any help would be greatly appreciated!! thanks!

Original Attachment has been moved to: bootOutput.txt.zip

Re: No output to screen

saurabh206 — Tue, 21 Apr 2015 10:14:18 GMT

Please use "echo 0 > /sys/class/graphics/fb0/blank" in order to unblank the fb0.

Thanks

Saurabh

Re: No output to screen

jonathansmyth — Tue, 21 Apr 2015 10:17:01 GMT

just type that into my terminal at which the board is connected?

or where change the bootargs?

Re: No output to screen

saurabh206 — Tue, 21 Apr 2015 10:19:11 GMT

Run on terminal.

Re: No output to screen

jonathansmyth — Tue, 21 Apr 2015 10:22:07 GMT

hi,

Yes i have ran this on the terminal and rebooted...however still just a blankwhite screen?

thanks Jonny

Re: No output to screen

jaymind — Tue, 21 Apr 2015 10:42:18 GMT

Hi,

Which type of LCD display you are using ?:smileyinfo:

LVDS type or RGB type or HDMI ? please specify its details, resolution and etc...

And just try to change your boot argument(below)

bootargs=console=ttymxc3,115200 init=/init video=mxcfb0:dev=ldb,bpp=32 video=mxcfb1:off video=mxcfb2:off fbmem=10M vmalloc=400M

bootargs=console=ttymxc3,115200 init=/init video=mxcfb0:dev=ldb,LDB-WVGA,if=RGB666 video=mxcfb1:off video=mxcfb2:off fbmem=28M vmalloc=400M androidboot.console=ttymxc1 androidboot.hardware=freescale mem=1024M

(assume that you are using LVDS type 7 inch display) :smileyinfo:

Just try it out, may it will help you.

Regards

Jaymin Dabhi

Re: No output to screen

jonathansmyth — Tue, 21 Apr 2015 10:58:43 GMT

hi Jaymin,

so i changed thet booatargs...like so:

Environment size: 1966/131068 bytes

MX6 F+S U-Boot > setenv bootargs console=ttymxc3,115200 init=/init video=mxcfb0:dev=ldb,LDB-WVGA,if=RGB666 video=mxcfb1:off video=mxcfb2:off fbmem=28M vmalloc=400M androidboot.console=ttymxc1 androidboot.hardware=freescale mem=1024M

MX6 F+S U-Boot > saveenv

Saving Environment to NAND...

Erasing Nand...

Erasing at 0x280000 -- 100% complete.

Writing to Nand... done

MX6 F+S U-Boot > boot

setenv - set environment variables

Usage:

setenv name value ...

- set environment variable 'name' to 'value ...'

setenv name

- delete environment variable 'name'

NAND read: device 0 offset 0x300000, size 0x600000

6291456 bytes read: OK

kernel @ 10008000 (4435508)

ramdisk @ 11000000 (233989)

kernel cmdline:

use uboot command line:

console=ttymxc3,115200 init=/init video=mxcfb0:dev=ldb,LDB-WVGA,if=RGB666 video=mxcfb1:off video=mxcfb2:off fbmem=28M vmalloc=400M androidboot.console=ttymxc1 androidboot.hardware=freescale mem=1024M

Starting kernel ...

but now its frozen onto the Starting kernel bit and wont go anyfurther....

also the specs for the monitor are correct lvds type 7 !

Thanks for your help, but any other suggestions to this? i am completely stuck!!

Thanks Jonny

Re: No output to screen

jaymind — Tue, 21 Apr 2015 11:12:51 GMT

Hello,

Try to change it as below,

setenv bootargs console=ttymxc3,115200 init=/init video=mxcfb0:dev=ldb,LDB-WVGA,if=RGB666 video=mxcfb1:off video=mxcfb2:off fbmem=28M vmalloc=400M

Regards

Jaymin Dabhi

Re: No output to screen

jonathansmyth — Tue, 21 Apr 2015 11:35:40 GMT

hi Jaymin,

so that setenv has allowed the kernel to go back to running...

but then:

DVFS driver module loaded

regulator_init_complete: VDDD: incomplete constraints, leaving on

rtc-pcf8563 0-0051: low voltage detected, date/time is not reliable.

rtc-pcf8563 0-0051: retrieved date/time is not valid.

rtc-pcf8563 0-0051: hctosys: invalid date/time

Freeing init memory: 216K

android_work: sent uevent USB_STATE=CONNECTED

it stops after here and i have no output to the screen just blank white...I am building for imx6DL i should have said to the video=mxcfb2:off is not needed, but i have removed it!

Sorry to be a hassle,

Thanks Jonny