Re: [EXT] Re: [PATCH 0/2] drm: imx: Add NWL MIPI DSI host controller support

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Hi,
On Tue, May 28, 2019 at 10:10:11AM +0000, Laurentiu Palcu wrote:
> Hi Guido,
> 
> On Tue, May 28, 2019 at 11:33:00AM +0200, Guido Günther wrote:
> > Caution: EXT Email
> > 
> > Hi Laurentiu,
> > On Tue, May 28, 2019 at 07:03:54AM +0000, Laurentiu Palcu wrote:
> > > Hi Shawn, Lucas,
> > >
> > > On Tue, May 28, 2019 at 09:38:02AM +0800, Shawn Guo wrote:
> > > > Caution: EXT Email
> > > >
> > > > Hi Lucas,
> > > >
> > > > On Mon, May 27, 2019 at 03:36:53PM +0200, Lucas Stach wrote:
> > > > > We have been looking at how to support DCSS in mainline for a while,
> > > > > but most of the actual work got pushed behind in schedule due to other
> > > > > priorities.
> > > >
> > > > I have some time to contribute.  Would you suggest how I should help
> > > > here?
> > > >
> > > > 1. You guys already have something close to completion and do not need
> > > >    more hands.
> > > > 2. You guys already have some preliminary code and can use help from
> > > >    others.
> > > > 3. You guys haven't got anything to start with, but just some design
> > > >    principles that anyone who wants to work on it should consider.
> > > >
> > > > Which is the one that you want me to read?
> > >
> > > We're already working on clearing up the DCSS code and preparing it for
> > > upstreaming. It should be done in the following weeks. The reason we've
> > > been delaying this is because neither HDMI nor MIPI support was present
> > > and, until these are upstream, testing DCSS would be quite impossible.
> > 
> > MIPI support is here:
> > 
> >   mixel:  https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpatchwork.freedesktop.org%2Fseries%2F58817%2F&data=02%7C01%7Claurentiu.palcu%40nxp.com%7C9924c4628d5f4f98d8a808d6e34f7b26%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C636946327839828366&sdata=VZvvhe2WkMVCSOEw5oZDJfy7rsqF7YaEirrkLFC8Icw%3D&reserved=0
> >   nwl:  https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpatchwork.freedesktop.org%2Fseries%2F57686%2F&data=02%7C01%7Claurentiu.palcu%40nxp.com%7C9924c4628d5f4f98d8a808d6e34f7b26%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C636946327839838359&sdata=Q4s6OZq1KElktjSXRd2lKBMdg1yPJsWGm8UrSPqqTiE%3D&reserved=0
> > 
> > The NWL driver needs to be adjusted depending on whether we hook into
> > imx-display-subsystem or not (and then likely moved to the right
> > subdir). Can we somehow get this moving in sync (even in a non public
> > tree if necessary).
> 
> I guess we could do that as well. I'll start adjusting the driver and
> take it out of imx-drm, as suggested by Lucas and Daniel. I'll use your
> MIPI patches to test with.

Cool. this will likely mean turning the NWL part into a bridge which I
can look into. We want that when interfacing with mxsfb anyway.
Cheers,
 -- Guido
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