i.MX ProcessorsのトピックRe: LCD and hdmi dual display problem

LCD and hdmi dual display problem

yyuan — Sat, 13 Apr 2019 07:05:21 GMT

LCD and hdmi dual display problem。

i want to display on lcd and hdmi.

kernel is 4.1.15.

the LCD resolution is 1024x600, the hdmi resolution is 1920x1080.lcd is fb0,hdmi is fb2.

lcd and hdmi is ok alone. but together is not ok.

I want LCD and hdmi to show the same thing,such as qt 、video and real-time camera image.

what should i do?

please help me.

thank you.

Re: LCD and hdmi dual display problem

igorpadykov — Sun, 14 Apr 2019 22:51:30 GMT

Hi 袁野

what bsp used in the case, one can try nxp official L4.1.15 from

linux-imx - i.MX Linux kernel

this configuration works fine as described in attached Linux Guide p.26 using

boot command line:

U-Boot > setenv displayinfo 'video=mxcfb1:dev=ldb video=mxcfb0:dev=hdmi,
1920x1080M@60,if=RGB24' for LVDS and HDMI dual displays

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

Re: LCD and hdmi dual display problem

yyuan — Mon, 15 Apr 2019 00:58:05 GMT

hi igorpadykov

thank you

now i set displayinfo, it is right.but hdmi is not display.

images are displayed only on LCD.

i want to can display on LCD and hdmi together.

i want to know how to do it.

please help me

thank you

Re: LCD and hdmi dual display problem

igorpadykov — Mon, 15 Apr 2019 02:36:19 GMT

please try nxp official L4.1.15 from

linux-imx - i.MX Linux kernel

Best regards
igor

Re: LCD and hdmi dual display problem

yyuan — Mon, 15 Apr 2019 03:52:35 GMT

thank you

you mean let me download this kernel?

i have kernel 4.1.15.

i don`t why download the kernel?

please help me

thank you