Re: [RFC 00/14] Add DT support to OMAPDSS

On 2013-03-27 11:30, Benoit Cousson wrote:

Hi Tomi,

On 03/27/2013 09:45 AM, Tomi Valkeinen wrote:

quoted

Hi,

This is an RFC for OMAPDSS DT support. I've only added support for a few boards
and a few DSS outputs, but they should give quite a good range of different use
cases. If these work well, I think the rest of the outputs and panels will be
ok too.

The purpose of this series is to get comments about the dts changes. There are
still work to be done, like adding DT binding documentation.

Some notes:

* DSS Submodules

The DSS submodules are children of the dss_core node. This is done because the
submodules require the dss_core to be alive and initialized to work, even if
the submodules are not really behind dss_core. Having the submodules as
children will make runtime PM automatically handle the dependency to dss_core.
I think usually a node being a child means that it's on the parent's bus, which
is not the case here. I'm not sure if that's an issue or not.

FWIW, there is a L4_DSS interconnect. It is used internally to connect
all the submodules to the DSS L3 port. So this representation is
perfectly valid and does represent accurately the HW.

Ah, yes, I can see it mentioned in the OMAP4430 Block Diagram figure in
the TRM. No other mentions, though, I guess it's not really relevant =).
But good to know that the DT representation is actually correct.

 Tomi