LCD and hdmi dual display problem

[yyuan]

hi

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.

[igorpadykov]

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
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[yyuan]

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

[igorpadykov]

Hi

please try nxp official L4.1.15 from

linux-imx - i.MX Linux kernel 

Best regards
igor

[yyuan]

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