From: Thierry Reding <thierry.reding@gmail.com>
To: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-samsung-soc@vger.kernel.org"
<linux-samsung-soc@vger.kernel.org>,
Sean Paul <seanpaul@google.com>,
Daniel Vetter <daniel.vetter@ffwll.ch>,
sunil joshi <joshi@samsung.com>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Ajay kumar <ajaynumb@gmail.com>,
Prashanth G <prashanth.g@samsung.com>,
Ajay Kumar <ajaykumar.rs@samsung.com>
Subject: Re: [PATCH V7 11/12] Documentation: bridge: Add documentation for ps8622 DT properties
Date: Tue, 23 Sep 2014 16:45:10 +0200 [thread overview]
Message-ID: <20140923144509.GF5982@ulmo> (raw)
In-Reply-To: <54215A17.8050606@ti.com>
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On Tue, Sep 23, 2014 at 02:31:35PM +0300, Tomi Valkeinen wrote:
> On 23/09/14 12:39, Thierry Reding wrote:
>
> > My point is that if you use plain phandles you usually have the
> > meta-data already. Referring to the above example, bridge0 knows that it
> > should look for a bridge with phandle &bridge1, whereas bridge1 knows
> > that the device it is connected to is a panel.
>
> The bridge should not care what kind of device is there on the other
> end. The bridge just has an output, going to another video component.
You'll need to know at some point that one of the devices in a panel,
otherwise you can't treat it like a panel.
> >> Well, I can't say about this particular bridge, but afaik you can
> >> connect a parallel RGB signal to multiple panels just like that, without
> >> any muxing.
> >
> > Right, but in that case you're not reconfiguring the signal in any way
> > for each of the panels. You send one single signal to all of them. For
>
> Yes, that's one use case, cloning. But I was not talking about that.
>
> > all intents and purposes there is only one panel. Well, I guess you
> > could have separate backlights for the panels. In that case though it
> > seems better to represent it at least as a virtual mux or bridge, or
> > perhaps a "mux panel".
>
> I was talking about the case where you have two totally different
> devices, let's say panels, connected to the same output. One could take
> a 16-bit parallel RGB signal, the other 24-bit. Only one of them can be
> enabled at a time (from HW perspective both can be enabled at the same
> time, but then the other one shows garbage).
So we're essentially back to a mux, albeit maybe a virtual one.
Thierry
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next prev parent reply other threads:[~2014-09-23 14:45 UTC|newest]
Thread overview: 93+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-27 14:39 [PATCH V7 11/12] Documentation: bridge: Add documentation for ps8622 DT properties Ajay Kumar
2014-08-27 14:39 ` [PATCH V7 10/12] Documentation: devicetree: Add vendor prefix for parade Ajay Kumar
2014-08-27 14:39 ` [PATCH V7 09/12] Documentation: drm: bridge: move to video/bridge Ajay Kumar
2014-09-17 11:52 ` [PATCH V7 11/12] Documentation: bridge: Add documentation for ps8622 DT properties Tomi Valkeinen
2014-09-17 14:29 ` Ajay kumar
2014-09-17 16:22 ` Tomi Valkeinen
2014-09-18 5:50 ` Ajay kumar
2014-09-19 12:54 ` Tomi Valkeinen
2014-09-19 13:59 ` Ajay kumar
2014-09-19 14:28 ` Tomi Valkeinen
2014-09-20 11:22 ` Ajay kumar
2014-09-20 15:27 ` Javier Martinez Canillas
2014-09-22 6:00 ` Ajay kumar
2014-09-22 15:05 ` Tomi Valkeinen
2014-10-07 10:30 ` Tomi Valkeinen
2014-10-07 10:36 ` Ajay kumar
2014-10-07 14:49 ` Laurent Pinchart
2014-10-08 7:09 ` Thierry Reding
2014-10-10 13:03 ` Ajay kumar
2014-10-16 8:23 ` Ajay kumar
2014-10-16 9:04 ` Laurent Pinchart
2014-10-28 9:12 ` Javier Martinez Canillas
2014-10-28 11:12 ` Ajay kumar
2014-09-22 8:26 ` Thierry Reding
2014-09-22 14:42 ` Tomi Valkeinen
2014-09-23 5:53 ` Thierry Reding
2014-09-23 8:41 ` Tomi Valkeinen
2014-09-23 9:28 ` Thierry Reding
2014-09-23 11:15 ` Tomi Valkeinen
2014-09-23 14:29 ` Thierry Reding
2014-09-23 15:25 ` Tomi Valkeinen
2014-09-22 8:10 ` Thierry Reding
2014-09-22 8:31 ` Ajay kumar
2014-09-22 10:41 ` Thierry Reding
2014-09-22 11:23 ` Ajay kumar
2014-09-22 11:35 ` Thierry Reding
2014-09-22 12:12 ` Ajay kumar
2014-09-23 0:00 ` Laurent Pinchart
2014-09-23 5:55 ` Thierry Reding
2014-09-23 6:11 ` Ajay kumar
2014-09-23 6:28 ` Thierry Reding
2014-09-23 11:47 ` DT property to selectively disable device features (was [PATCH V7 11/12] Documentation: bridge: Add documentation for ps8622 DT properties) Laurent Pinchart
2014-09-22 8:06 ` [PATCH V7 11/12] Documentation: bridge: Add documentation for ps8622 DT properties Thierry Reding
2014-09-22 14:23 ` Tomi Valkeinen
2014-09-23 6:04 ` Thierry Reding
2014-09-23 7:24 ` Andrzej Hajda
2014-09-23 8:35 ` Thierry Reding
2014-09-23 9:40 ` Tomi Valkeinen
2014-09-23 10:01 ` Thierry Reding
2014-09-23 12:09 ` Tomi Valkeinen
2014-09-23 14:38 ` Thierry Reding
2014-09-23 15:33 ` Tomi Valkeinen
2014-09-23 9:43 ` Andrzej Hajda
2014-09-23 10:10 ` Thierry Reding
2014-09-23 10:34 ` Andrzej Hajda
2014-09-23 14:41 ` Thierry Reding
2014-09-24 7:11 ` Andrzej Hajda
2014-09-24 8:27 ` Tomi Valkeinen
2014-09-23 11:33 ` Laurent Pinchart
2014-09-23 8:54 ` Tomi Valkeinen
2014-09-23 9:39 ` Thierry Reding
2014-09-23 11:31 ` Tomi Valkeinen
2014-09-23 14:45 ` Thierry Reding [this message]
2014-09-24 8:42 ` Tomi Valkeinen
2014-10-06 14:40 ` Laurent Pinchart
2014-10-07 7:06 ` Tomi Valkeinen
2014-10-07 7:23 ` Laurent Pinchart
2014-10-07 8:25 ` Tomi Valkeinen
2014-10-07 16:14 ` Laurent Pinchart
2014-09-22 7:54 ` Thierry Reding
2014-09-22 14:04 ` Tomi Valkeinen
2014-09-23 6:21 ` Thierry Reding
2014-09-23 9:30 ` Tomi Valkeinen
2014-09-23 9:53 ` Thierry Reding
2014-09-23 11:12 ` Laurent Pinchart
2014-09-23 14:50 ` Thierry Reding
2014-09-23 12:00 ` Tomi Valkeinen
2014-09-23 14:58 ` Thierry Reding
2014-09-24 9:08 ` Tomi Valkeinen
2014-09-25 6:23 ` Thierry Reding
2014-10-06 11:34 ` Tomi Valkeinen
2014-10-06 13:55 ` Laurent Pinchart
2014-09-23 10:02 ` Andrzej Hajda
2014-09-23 10:02 ` Andrzej Hajda
2014-09-23 11:10 ` Laurent Pinchart
2014-09-23 11:18 ` Andrzej Hajda
2014-09-23 11:23 ` Laurent Pinchart
2014-09-23 11:47 ` Andrzej Hajda
2014-09-23 11:52 ` Laurent Pinchart
2014-09-23 12:40 ` Andrzej Hajda
2014-09-23 12:40 ` Andrzej Hajda
2014-09-23 14:49 ` Thierry Reding
2014-10-06 14:38 ` Laurent Pinchart
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