Change display resolution of iMx6

[tahimr]

Hi there,

I'm beginner in iMX6. This is several basic question:

S:1920x1080p-60

S:1920x1080p-50

S:1280x720p-60

V:640x480p-60

D:1280x720p-60

V:640x480p-60

1.what is S, D, V, p, i stand for?

2. how can i change resolution of hdmi output?

3. Any example source code for test hdmi. For instance, display something via hdmi?  

4. what is difference between "mode" and "modes" in "/sys/class/graphics/fb1/"              => done

My system: Linux kernel 3.0.35

dmesg | grep mxc_hdmi

mxc_sdc_fb mxc_sdc_fb.1: register mxc display driver hdmi

Thank you,

[daonamthai]

1.what is S, D, V, p, i stand for?

i: interlaced

p:progressive

Please refer: http://www.serif.com/blog/video-editing-terms-explained-part-2-progressive-p-vs-interlaced-i-recordi...

[saurabh206]

Hi,

export DISPLAY=:0

Saurabh

[tahimr]

It's still doesn't work. Do i need connect real monitor to hdmi port? I have just typed a command.

[saurabh206]

Hi,

What is your kernel command line?

what happens after following command

export DISPLAY=:0

xrandr -s 1920x1080

Did you get any error message?

[tahimr]

This is response message

"Can't open display : 0 "

[saurabh206 · Accepted solution]

Hi,

tahi

4. what is difference between "mode" and "modes" in "/sys/class/graphics/fb1/"

modes shows the list of supported resolution. and mode provides the information for the current setup resolution.

You change the value in mode from different values of modes.

if xrandr command is available than it can also be used to change the output display.

"xrandr -s 1920x1080" sets output to 1080p

Regards

Saurabh

[tahimr]

Thank you so much.

xrandr return "Can't open display"

What frame buffer (fb0, fb1...) is impacted by "xrandr" ?

In case, i want add more to list of support resolution. How can i do?

Sincerely,

Tahi