[PATCH v4 1/3] Runtime Interpreted Power Sequences
Alex Courbot
acourbot at nvidia.com
Tue Aug 21 18:53:27 EST 2012
On Tuesday 21 August 2012 16:33:30 Thierry Reding wrote:
> I suppose power sequences aren't needed if you have a specific driver
> for every panel out there. However that also means that you'd have to
> write drivers for literally every panel that requires support. In the
> end this will just result in discussion down the road how the common
> functionality can be refactored and we may end up with power sequences
> again.
>
> Also as you mentioned, power sequences are useful for a number of other
> use-cases. Without power sequences you'll have to potentially create
> extra frameworks tha reimplement parts of the power sequence code for
> their specific hardware needs.
Yes, I can imagine what a mess it would become it we had one driver for every
panel out there which sole purpose would be to define power sequences over more
generic drivers. That reassures me about the usefulness of this work.
Another (small) benefit of power sequences over specific drivers is that being
defined in the DT, they would allow an old kernel to operate a newer device if
the base driver is the same.
Alex.
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