HDMI via /dev/fb0 writing

[mariuszb]

Hi,

 

Question to experts in linux 

I wrote a program© that directly draws / writes to framebuffor /dev/fb0

 (LCD connected to the HDMI - Shows graphic reading temeperature DS1820, actual clock etc)

 

What to do to disable writing to the same buffor by the system?

 

Thanks

[fatboyatdesk]

Not an expert or even close...

But ...

I thought the whole point of the driver/controller model is to manage resource contention in userspace.

otherwise everyone would just map registers into their virtual memory and have at it.

Which I guess is the argument for userspace drivers when that is appropriate and don't risk crashing your kernel etc.

 

So if your using a driver to update a fb it should be safe.

 

I'm guessing youve gone here but putting it out there incase..

https://www.kernel.org/doc/Documentation/fb/

 

The Linux driver/controller arena could definitely be more understandable.