Need advice for a screen resolution (LVDS)

[kruglikov_dmt]

Hello.

I need to output video with 1024x768 resolution and RGB24bit but with unusual 50  FPS (as I know 60 is default) to display via LVDS interface.

At first, as I understand, I should to set video mode in u-boot.

Example of eEnv.txt: video=mxcfb0:dev=ldb,1024x768M@50,if=RGB24,bpp=32

(You can see that I setted non-standard @50 FPS in that example)

Should I also change devices tree (for example, section &ldb, or something else) ?

Also I can't find information about output RGB format.

So, there are two main questions:

* Is it possible to use non-standard FPS and what I should to make it possible?

* Which is output RGB format, JEIDA or VESA?

Thanks!

[igorpadykov]

Hi Eugene

for changing lcd resolution may be useful links:

How to change SABRE-SD screen resolution in LOLLIPOP(5.0.0? 

fsl,imx-fb.txt\imx\display\bindings\devicetree\Documentation - kernel/git/torvalds/linux.git - Linux... 

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

[kruglikov_dmt]

Do you know something about output RGB format?

For example if I'll set "if=RGB24" will it JEIDA or VESA?

[igorpadykov · Accepted solution]

> information about settings FPS

one can look at "refresh" setting in struct fb_videomode[] AN3974 p.24:

https://www.nxp.com/docs/en/application-note/AN3974.pdf 

>will it JEIDA or VESA?

ldb.txt\imx\display\bindings\devicetree\Documentation - linux-imx - i.MX Linux kernel 

Best regards
igor

[kruglikov_dmt]

Thank you!

[kruglikov_dmt]

Thank you for hint, however there is no information about settings FPS and how imx.6 does processing that settings.