i.MX ProcessorsのトピックRe: mirror display in imx6

mirror display in imx6

adnanali — Sat, 30 Jan 2016 12:44:55 GMT

I am trying to get a mirrored display between the LVDS and HDMI. ldb is mxcfb0 and hdmi is mxcfb1.

if i do not add video=mxcfb0:off in bootargs then the ldb shows up and there is nothing on the HDMI. In this case I can test HDMI by dumping some pixels onto the HDMI frame-buffer by using echo command ..like
echo "hello nxp community" > /dev/fb2.

If I add video=mxcfb0:off in the command line then the primary display is HDMI and there are no frambuffers for the LDB device.

I have already tried "Can I mirror a LVDS channel on HDMI? " but it did not prove any good.

Do i need to do something else to support a mirrored display between the two framebuffers ?

PS: ldb is using ipuID=1 displayID=0 ("overlayed") and HDMI is using ipu1 displayID=1.

Moreover what do these kernel parameters do "di0_primary ldb=di1"

Thanks

Re: mirror display in imx6

weidong_sun — Mon, 01 Feb 2016 06:53:46 GMT

Hello adnan,

It seems that you are using Android system , right ?

For android BSP of i.MX6, mxcfb0 must be used. you can't make it off on command line of u-boot.

Regards,

Weidong

Re: mirror display in imx6

adnanali — Mon, 01 Feb 2016 07:52:16 GMT

Nope. I am not using it for android. In the config file

# CONFIG_ANDROID is not set

Re: mirror display in imx6

adnanali — Tue, 02 Feb 2016 09:22:19 GMT

I am using kernel 3.14 if that can help you in figuring out the problem. Found there is a lot of updates in ldb in this kernel version as compared to kernel 3.10.

Re: mirror display in imx6

adnanali — Wed, 03 Feb 2016 19:48:43 GMT

I need to find a solution to this problem ....kindly bring it to your attention ... Regards