CVS commit: src/sys/arch/arm

["matthew green" <mrg%netbsd.org@localhost>]

Module Name:    src
Committed By:   mrg
Date:           Sat Oct  2 20:41:47 UTC 2021

Modified Files:
        src/sys/arch/arm/dts: rk3399-pinebook-pro.dts rk3399-rockpro64.dts
        src/sys/arch/arm/rockchip: rk3399_pcie.c

Log Message:
default RK3399 PCIe to 1.x.

sometime in mid-2019, rockchip disabled PCIe 2.x referrencing a
non-public errata in linux and the dts, both of which were changed
to default to only PCIe 1.x (in code, and in DT.)  see:

   https://lore.kernel.org/all/1481881357-1793-1-git-send-email-shawn.lin%rock-chips.com@localhost/

we haven't observed any specific problems, but we've also tested
far fewer cards than linux.  there are other issues such as what
happens for a PCI abort depending on which CPU triggers it we do
not currently handle either.

tested on rockpro64 with nvme & ahcisata, and pinebook pro nvme.

still allows DT to set back to '2' if the user so desires.


To generate a diff of this commit:
cvs rdiff -u -r1.3 -r1.4 src/sys/arch/arm/dts/rk3399-pinebook-pro.dts
cvs rdiff -u -r1.12 -r1.13 src/sys/arch/arm/dts/rk3399-rockpro64.dts
cvs rdiff -u -r1.17 -r1.18 src/sys/arch/arm/rockchip/rk3399_pcie.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.