fb0,fb1,overlay,video16,video17

cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

fb0,fb1,overlay,video16,video17

4,109 Views
zhangdan
Contributor I

It's not clear about their relationship.

base on Linux

I can change fb0's alpha to control show fb0 or fb1. And I can get their data by use "cat /dev/fb0" or "dd if of".

But what is overlay? How can I get it's data? What are their function, video16 and video17?

Labels (4)
0 Kudos
1 Reply

693 Views
igorpadykov
NXP Employee
NXP Employee

HI zhang

V4L2 devices are registered as videoN and described in V4L2 documentation, like
16. The ivtv driver — Linux Media Subsystem Documentation documentation 

fbN are provided in dts files (linux/arch/arm/boot/dts)

for overlay one can check documentation in imx-test,  mxc_fb_test  

www.nxp.com/lgfiles/NMG/MAD/YOCTO/imx-test-5.7.tar.gz
and presentation

A Deep Dive into Image Processing for i.MX 6 Series Applications Processors 

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

0 Kudos