Re: About Rcar Du

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hellu Stuvart,

On Thursday 19 Jan 2017 23:06:08 Stuvart S wrote:
> Hi Laurent,
> 
> Thank you for that information. I am not meaning to capture the
> frames to memory but, I have my own C code snippet to alter image to
> some other forms which reads from a frame buffer ..here I am going to
> do the tapping of image data from DU and modify according to my code
> and write back to same location so that I expect the DU output will
> alter..Actually there should be the image data which is get transfered
> through DU unit to various DU outputs right?
> 
> or should I Concentrate on framebuffer?...I Could see a file named
> framebuffer.c in /driver/gpu/drm/ in the stable kernel release which I
> Could not in older versions..I don't know what is the reason of that..

I think you need to learn more about the DRM/KMS API. At this point this isn't 
a DU-specific issue, and what you want to do isn't how the display APIs in 
Linux operate.

-- 
Regards,

Laurent Pinchart