HI:
can you help me?
i would like to having a display on the HDMI and LVDS.So,i refer to the sarbresd linux release note.I modified the kernel boot parameters as follows:
set bootargs console=ttymxc0,115200 init=/init video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24 video=mxcfb1:dev=ldb LDB-XGA if=RGB666 fbmem=30M,vmalloc=400M androidboot.console=ttymxc0
At last ,i found always to be display either hdmi or LVDS. In a word ,one of these can be displayed.
can you told me the answer?
Solved! Go to Solution.
Can you try the following bootargs?:
setenv bootargs_mmc 'setenv bootargs ${bootargs} root=/dev/mmcblk0p1 rootwait rw video=mxcdi0fb:RGB24,1024x768M@60 hdmi video=mxcdi1fb:RGB666,XGA di0_primary ldb=di1 ip=none'
the penguin is shown only in the HDMI,then if you enter the command:
echo 0 > /sys/class/graphics/fb1/blank
The penguin will be shown in the LVDS
You could also use this one:
setenv bootargs_mmc 'setenv bootargs ${bootargs} root=/dev/mmcblk0p1 rootwait rw video=mxcdi0fb:RGB24,1024x768M@60 hdmi video=mxcdi1fb:RGB666,XGA di1_primary ldb=di1 ip=none'
the penguin is only shown in the LVDS ,then if you enter the command:
echo 0 > /sys/class/graphics/fb1/blank
The penguin will be shown in the HDMI
Let me know if it works
Hello Tang,
Are you looking to mirror both screens?
yes,i am looking to mirror both screens!
i read the the sarbresd linux release note and want to do it.
thanks for your concern and i hope to get further answers
THANKS!
Can you try the following bootargs?:
setenv bootargs_mmc 'setenv bootargs ${bootargs} root=/dev/mmcblk0p1 rootwait rw video=mxcdi0fb:RGB24,1024x768M@60 hdmi video=mxcdi1fb:RGB666,XGA di0_primary ldb=di1 ip=none'
the penguin is shown only in the HDMI,then if you enter the command:
echo 0 > /sys/class/graphics/fb1/blank
The penguin will be shown in the LVDS
You could also use this one:
setenv bootargs_mmc 'setenv bootargs ${bootargs} root=/dev/mmcblk0p1 rootwait rw video=mxcdi0fb:RGB24,1024x768M@60 hdmi video=mxcdi1fb:RGB666,XGA di1_primary ldb=di1 ip=none'
the penguin is only shown in the LVDS ,then if you enter the command:
echo 0 > /sys/class/graphics/fb1/blank
The penguin will be shown in the HDMI
Let me know if it works
YES,it works ,thank you
I would like to ask another problem. I want to display the different content on two LVDS and how to do it. It should be async display.