Frame buffer and plane difference

[Anand Sinha]

Hi Rob,

Thanks for the answer.so as per the definitions I understand the below
points.
a) frame buffer here signifies the scan out buffer which encompasses
complete display.
b)when I see the definition of plane in the doc book it says " planes are
associated with a frame buffer to crop a portion of the image source and
optionally scale it to destination size". I assume this is not the same
frame buffer as point a.
c)planes are overlayed or blended over the scanout buffer.

Regards,
Anand
On 23-May-2014 7:25 PM, "Rob Clark" <robdclark at gmail.com> wrote:

> See:
>
> http://people.freedesktop.org/~danvet/drm/drm-mode-setting.html#idp57325824
>
> although the docbook probably should be updated (now that we have
> primary-planes) to read something more like: "...that provide a source
> of pixels to scanout to a plane"
>
> (since a plane is basically the part of display controller block that
> reads in the pixel data from the fb)
>
>
>
> On Thu, May 22, 2014 at 6:30 PM, Anand Sinha <anand.sinha85 at gmail.com>
> wrote:
> > Hello,
> >
> > Can someone help me understand the basic difference between a plane and a
> > frame buffer.
> >
> > Regards,
> > Anand
> >
> >
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel at lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/dri-devel
> >
>
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