Re: [RFC PATCH v2 19/21] ARM: dts: exynos5250-arndale: add dsi and panel nodes

[Tomi Valkeinen <tomi.valkeinen@ti.com>]

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On 28/02/14 15:31, Tomi Valkeinen wrote:

> Compared to what I've done on OMAP, you don't seem to specify the video
> inputs for the tc358764 at all. In this case it's obvious, as the chip
> is a child of the DSI master. But the chip could as well be controlled
> via i2c, and so be placed as a child of the i2c nodes.
> 
> So even if the driver doesn't use it, maybe it would be more future
> proof to have both input and output endpoints for the tc358764?

Oh, and one addition: how me and Laurent see the DSI case (and other
similar ones), the child/parent relationship gives the control bus path,
and the video ports give the video data path.

So both are always needed. A DSI panel may be controlled via DSI, i2c,
spi, but the video path will always go from DSI master to the panel.

Or, as a theoretical panel, you could have a DSI controlled panel, being
a child of the DSI master, but the video data would come via, say,
parallel RGB. You can actually do that with some panels/encoders, even
if the concept is silly.

 Tomi



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