On Wed, Oct 12, 2016 at 12:28:36PM +0200, Mark Brown wrote: > On Wed, Oct 12, 2016 at 12:00:03PM +0300, Mika Westerberg wrote: > > > The _DEP method should be used for Operation Region dependencies but > > here it is used for functional dependencies so that the audio machine > > driver can find the corresponding codec. Why Microsoft used it like this > > and not pushed it to ASWG to be added to the ACPI spec? Should we now > > refuse to support it in Linux on the basis that it has not been > > discussed with ASWG and it abuses _DEP? > > The fact that the ACPI community hasn't been doing a good job of working > together is essentially the issue that people are pushing back on here. > We appear to not even be trying to set a better standard for how to do > things here. Why using _DSD and the existing, well tested, DT properties (remote endpoints) is not even considered making a better standard? > Sitting externally to the group at Intel doing this it really looks like > there's been a decision to mirror DT into ACPI en masse. There has been no such decision as far as I can tell. > If we really want to do that we should actually take that decision, > preferrably with at least buy in from other ACPI users on Linux and > with some review of existing ACPI standardization efforts to make sure > we're not duplicating work there. Ideally we'd also be pushing > anything we do towards ASWG even if just as a fiat accomplait. Agreed. > > > By copying DT, but changing a few things, we're in effect creating a new > > > ill-defined Linux-specific standard. If we're going to create a new standard, > > > we should go through the ASWG, and make an actual standard. If we're not going > > > to create a new standard, we should use DT directly, rather than trying to > > > force DT into ACPI. > > > These boards we are talking about ship with ACPI based firmware. We > > should not expect users of those boards to be cabable of replacing the > > existing firmware with DT one. > > Since we're still at the point of defining bindings hopefully we're not > shipping yet... No, those systems are already out there. See Intel Joule for one example (there are many others). You can connect your own camera sensor there. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
