diff options
Diffstat (limited to 'sys/dev/fdt/rkpcie.c')
| -rw-r--r-- | sys/dev/fdt/rkpcie.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/sys/dev/fdt/rkpcie.c b/sys/dev/fdt/rkpcie.c index 82ea307c324..37f2b4d1d85 100644 --- a/sys/dev/fdt/rkpcie.c +++ b/sys/dev/fdt/rkpcie.c @@ -1,4 +1,4 @@ -/* $OpenBSD: rkpcie.c,v 1.9 2019/12/14 17:42:48 kurt Exp $ */ +/* $OpenBSD: rkpcie.c,v 1.10 2020/02/20 23:50:01 kurt Exp $ */ /* * Copyright (c) 2018 Mark Kettenis <kettenis@openbsd.org> * @@ -307,6 +307,13 @@ rkpcie_attach(struct device *parent, struct device *self, void *aux) } } + /* + * XXX On at least the RockPro64, many cards will panic when first + * accessing PCIe config space during bus scanning. A delay after + * link training allows some of these cards to function. + */ + delay(2000000); + /* Initialize Root Complex registers. */ HWRITE4(sc, PCIE_LM_VENDOR_ID, PCI_VENDOR_ROCKCHIP); HWRITE4(sc, PCIE_RC_BASE + PCI_CLASS_REG, |