mediacontroller for framebuffer

mediacontroller for framebuffer

[Sebastien LEDUC]

Hi Laurent
I have seen that a long time ago you had done some prototyping work for exposing framebuffer devices as media entities:
http://www.spinics.net/lists/linux-fbdev/msg04408.html

What did happen to this prototyping ?
Seems it has never been merged, so could you please explain why ?

We have some similar needs, so I'd like to understand the right way to go

Thanks in advance

Regards
Sebastien
 

Re: mediacontroller for framebuffer

[Laurent Pinchart]

Hi Sebastien,

On Wednesday 20 January 2016 14:52:30 Sebastien LEDUC wrote:
> Hi Laurent
> I have seen that a long time ago you had done some prototyping work for
> exposing framebuffer devices as media entities:
> http://www.spinics.net/lists/linux-fbdev/msg04408.html
> 
> What did happen to this prototyping ?
> Seems it has never been merged, so could you please explain why ?
> 
> We have some similar needs, so I'd like to understand the right way to go

The prototype has been dropped as the framebuffer subsystem got deprecated. 
Display drivers should now use DRM/KMS.

-- 
Regards,

Laurent Pinchart

Re: mediacontroller for framebuffer

[Honza Petrouš]

Hi Laurent

>> I have seen that a long time ago you had done some prototyping work for
>> exposing framebuffer devices as media entities:
>> http://www.spinics.net/lists/linux-fbdev/msg04408.html
>>
>> What did happen to this prototyping ?
>> Seems it has never been merged, so could you please explain why ?
>>
>> We have some similar needs, so I'd like to understand the right way to go
>
> The prototype has been dropped as the framebuffer subsystem got deprecated.
> Display drivers should now use DRM/KMS.

FB is deprecated? Can you, please, provide some links regarding such talk?
Sorry for my ignorance, I was never so deep in DRM/KMS (as I treat that
as big gun for my small embedded systems I was working on) and I'm
still happy with simple FB support which I get from kernel.

Thanks.
/Honza

Re: mediacontroller for framebuffer

[Laurent Pinchart]

Hi Honza,

On Friday 22 January 2016 08:23:44 Honza Petrouš wrote:
> Hi Laurent
> 
> >> I have seen that a long time ago you had done some prototyping work for
> >> exposing framebuffer devices as media entities:
> >> http://www.spinics.net/lists/linux-fbdev/msg04408.html
> >> 
> >> What did happen to this prototyping ?
> >> Seems it has never been merged, so could you please explain why ?
> >> 
> >> We have some similar needs, so I'd like to understand the right way to go
> > 
> > The prototype has been dropped as the framebuffer subsystem got
> > deprecated. Display drivers should now use DRM/KMS.
> 
> FB is deprecated? Can you, please, provide some links regarding such talk?

https://lkml.org/lkml/2015/9/24/253

> Sorry for my ignorance, I was never so deep in DRM/KMS (as I treat that
> as big gun for my small embedded systems I was working on) and I'm
> still happy with simple FB support which I get from kernel.

DRM/KMS might be a bit complex for simple display controllers, but helpers 
that simplify driver development would certainly be welcome. All it will take 
is someone to write them :-)

-- 
Regards,

Laurent Pinchart