[PATCH 3/7] DRM: add sdrm layer for general embedded system support

Sascha Hauer s.hauer at pengutronix.de
Fri Apr 20 06:20:20 PDT 2012

On Fri, Apr 20, 2012 at 02:38:43PM +0200, Thierry Reding wrote:
> * Dave Airlie wrote:
> > I get the feeling the drm can just be a virtual platform device of
> > some sort, then it reads the device tree and binds all the information
> > on what crtc/encoders are available,
> That's pretty much what I've come up with in the second round of Tegra DRM
> patches. Basically display controllers and outputs (RGB, HDMI, TVO, DSI) get
> separate drivers and register themselves with the DRM driver which then looks
> at the device tree to see which display controllers to register as CRTCs and
> parses a list of connector nodes to create encoder/connector pairs that
> define the physical connectors and their corresponding outputs.
> I did take a brief look at the SDRM patches as well and they didn't quite
> seem to fit what was needed for Tegra. But if time allows I'll take a closer
> look.

Can you elaborate which parts don't fit? I am very interested to
improve this situation, and I think having code to share will be a
benefit for us all.

I know that the patches I wrote are no one-solution-fits-for-all yet,
they are mainly something to show that drm drivers do not have to be
huge complex drivers.


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