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Date:      Wed, 17 Jun 2020 11:44:51 +0000
From:      Dan Kotowski <dan.kotowski@a9development.com>
To:        myfreeweb <greg@unrelenting.technology>
Cc:        freebsd-arm <freebsd-arm@freebsd.org>
Subject:   Re: FreeBSD on Layerscape/QorIQ LX2160X
Message-ID:  <nlhCtVaaZNcHSX1IQln3UFlbo-JhWAUKTEC2KRhemn47vxujuE3kYZafL8qr2za8zYUlGDB1PvnyjrC3YwL5vS7l3S1DFb3d7gMNWr6_oo4=@a9development.com>
In-Reply-To: <D2780D27-20F4-4706-9956-7E188AD73F62@unrelenting.technology>
References:  <NkmJNP_BMdinQ07E7zvRW9EQtYTkHLISOPlALNNcbFXi7d0dsuvgHD2IW73ptiSh1kEml7_VHb9_eTIMaLAIeAici_qpz2UyIrBWzXR4mvE=@a9development.com> <KwrTwABcfEzegUc4D8ZsCgFSxouYQIMOa9JoIbpe6d1HInlAX4G0OzdL_d_uug3gifKwFoh1C_EUd5MucQUgtvFy4T0qraW6riyZbje4Mw8=@a9development.com> <cbf5773a03d3c67e133096a0f826274d@unrelenting.technology> <c1788ee7f14b9236e0972909032cb8fd@unrelenting.technology> <940a6099e971e01bd6d04564d0982b9d@unrelenting.technology> <c1e4129989005bc9bfd117988019107d@unrelenting.technology> <XYXpaNQ3XeZR6g5RpmjR3qs56wTKfNi_OpPX53S3yYdPMNMWR0kme-Q7hmNpxzR6EL3DqKxUnG8BcW6ueHv82Kaexu1j4VSLtNtQgYuxX_g=@a9development.com> <eRSoUazwekUoXHKtXhs_unN_78Zp3ow_uJ8j-ODdb7mgzz3n8L18wonbrqkmPn2ulVXoUKxHLh8Cc0VU6KMeIEm3X0KsPn8NH-JiqKmq8fI=@a9development.com> <D2780D27-20F4-4706-9956-7E188AD73F62@unrelenting.technology>

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> > > AHCI is looking better and better!
> > > I'm going to do a little bit of poking at that
> > > SATA HDD just to see how stable it really is.
> >
> > Well, it's definitely stable enough for lab use, that's a bonus. I caus=
ed myself a few headaches by doing stupid things that caused a series of pa=
nics, but all are easily attributed to human errata...
> > Oddly the i2c bus is gone - any ideas what we changed that caused it to=
 disappear?
> > https://gist.github.com/agrajag9/03d9f2f52084ef0ae1e64cbba190e062
> > If I'm reading the DSDT correctly, then it should be hanging right off =
acpi0. We can even see it in an older dmesg.boot:
> > i2c0: <Vybrid Family Inter-Integrated Circuit (I2C)> iomem 0x2000000-0x=
200ffff irq 7 on acpi0
> > But now, nothing...
>
> Probably because I deleted that i2c acpi attachment at some point, becaus=
e it didn't seem to actually work.

Yes, that would make sense...

> > Aside - since the builtin netifs are basically useless for us, any sugg=
estions on USB wifi dongles? I tried a few from my parts piles, but all of =
them were unstable Realtek trash. I know Atheros chips are usually a good b=
et in Linux land - does that hold true in FreeBSD as well?
>
> Not sure how common Atheros is on USB..

I guess we're going to find out!

https://www.thinkpenguin.com/gnu-linux/penguin-wireless-n-usb-adapter-gnu-l=
inux-tpe-n150usb

> Ralink is fine I think? Actually Realtek wifi shouldn't be unusable too..

While the realtek device I have does move packets, it also likes to emit wa=
rnings every few minutes, and it was definitely caused problems during boot=
 a few times as well.

> For USB Ethernet though, I recommend the "Nintendo Switch compatible" ASI=
X chips (axge).

Hah! I would not have expected that, but I may pick one up as well for the =
future - sadly no eth in my office at the moment.

> By the way, did you get any different firmware builds in the meantime? Th=
at don't have everything suspiciously routed to the SMMU in IORT..

No, not yet. I think he may be a one-man-army over there for a lot of SR's =
firmwares and progress has been slow - especially because they're focused s=
o much on supporting Linux.

Also, is there some good intro documentation for SMMU and IORT? I'm still p=
retty new to both Arm and ACPI, and while the spec docs on uefi.org have be=
en great reference material, they're a bit challenging to just sit down and=
 read.



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