[PATCH 5/5] DRM: Armada: add support for drm tda19988 driver

Jean-Francois Moine moinejf at free.fr
Tue Oct 8 11:34:18 EDT 2013

On Tue, 8 Oct 2013 10:49:39 +0100
Russell King - ARM Linux <linux at arm.linux.org.uk> wrote:

> On Tue, Oct 08, 2013 at 11:19:13AM +0200, Jean-Francois Moine wrote:
> > The Cubox is an open platform, and I use it just like a desktop PC.
> > When its required drivers will be in the mainline, I will do the same
> > as I do with PCs: I will not recompile a specific kernel each time
> > there are kernel bugs or security issues. Instead, I will just upgrade
> > my system from my distributor (Debian), and, in the packages, there
> > will be a generic mvebu kernel as there is already one for Marvell
> > Armada 370/xp, Freescale iMX5x/iMX6 (linux-image-3.10-3-armmp).
> > But, for that, all the Cubox specific stuff must be described in a DT.
> Which scenario is better:
> 1. To have something in mainline which is capable of driving the hardware,
>    but may need some additional work to make it useful for DT based setups.
> or
> 2. To have nothing.
> Now, you may prefer to have nothing, but personally, I prefer there to be
> forward progress.  Forward progress means getting some kind of DRM driver
> into mainline.  Yes, it may not work with DT setups yet, but - as per
> the discussions that have happened _endlessly_ on this topic, it's
> something that can be resolved at a later date.
> We _still_ haven't worked out how to properly deal with the TDA998x
> driver (or indeed any DRM based outputs) in a DT based setup, and all
> the time that problem exists, it won't be possible to write a proper
> stable DT binding for this.
> So please, get off your hobby horse about this and allow us to make some
> modicum of progress.

You forgot:

3. To have all patches ready for submission and have a working DT driven
   Cubox kernel.

I will submit a patch to add DT to the tda998x driver as soon as I have
checked the new audio properties we talked about yesterday.

Normally, this should have no impact on your Armada drm driver, and,
yes, I will add DT to your driver as soon as it will be accepted
(sorry to not ack it now: I had no time yet to have a look at it).

Ken ar c'hentañ	|	      ** Breizh ha Linux atav! **
Jef		|		http://moinejf.free.fr/

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