I am using a Wandboard card with iMX6Q, lcd Fusion 7WVGA-LCD-F07A-0102 and HDMI video output.
I can not seem to operate properly HDMI and LCD screen, in Android.
I have tried with Android 4.2 and with Android 4.3, but I have always the same problem:
When connected to HDMI and LCD The LCD freezes.
If I put in a stand-by mode IMX6, when the system restarts HDMI does not work, and lCD works well.
I've tried a lot of settings to no avail and I do not understand if this is a solvable problem.
Has anyone had the same problem?
Welcome any idea.
Solved! Go to Solution.
Thanks for your interesting.
This is the bootargs:
console=ttymxc0,115200 init=/init androidboot.console=ttymxc0 androidboot.hardware=wandboard vmalloc=400M video=mxcfb0:dev=lcd,SEIKO-WVGA,if=RGB666 video=mxcfb1:dev=hdmi,1280x720M@60,bpp=32 video=mxcfb2:off fbmem=10M,28M expansion=fwbadapt baseboard=wand
If I set HDMI 1920x1080M@60, the LCD not works.
I did some new tests and found that:
using dd if=/dev/urandom of=/dev/graphics/fb0 both videos reproduce the noise.
using dd if=/dev/urandom of=/dev/graphics/fb1 nobody plays the noise.
using dd if=/dev/urandom of=/dev/graphics/fb2 only the hdmi monitor reproduces the noise.
I saw in the tablet console
root@wandboard:/sys/class/graphics # ls -l
lrwxrwxrwx root root 1970-01-01 00:00 fb0 -> ../../devices/platform/mxc_sdc_fb.0/graphics/fb0
lrwxrwxrwx root root 1970-01-01 00:00 fb1 -> ../../devices/platform/mxc_sdc_fb.0/graphics/fb1
lrwxrwxrwx root root 1970-01-01 00:00 fb2 -> ../../devices/platform/mxc_sdc_fb.1/graphics/fb2
Is it right or I have an error of index?
In the boot log I saw:
[ 2.164617] mxc_sdc_fb mxc_sdc_fb.0: register mxc display driver lcd
[ 2.190706] mxc_sdc_fb mxc_sdc_fb.1: register mxc display driver hdmi
[ 2.197276] mxc_hdmi mxc_hdmi: Detected HDMI controller 0x13:0xa:0xa0:0xc1
[ 2.204341] fbcvt: 1280x720@60: CVT Name - .921M9
[ 2.218699] mxc_sdc_fb mxc_sdc_fb.2: Can't get fb option for mxcfb2!
[ 2.225921] imx-sdma imx-sdma: loaded firmware 1.1
[ 2.235008] imx-sdma imx-sdma: initialized
[ 2.239431] fbcvt: 1280x720@60: CVT Name - .921M9
[ 2.244751] Serial: IMX driver
I suspected, I asked, but the team Wandboard, gave me no answers.
I should create a device with an LCD and video Hdmi, where you work with lcd and touch screen, and appear on the video movies and images.
Interface with lcd lvds I can use any resolution or are there restrictions?
Could you suggest me what to look for?