On Wed, Jun 22, 2022 at 08:49:20AM +0200, Johan Hovold wrote: > On Tue, Jun 21, 2022 at 03:32:11PM -0500, Bjorn Helgaas wrote: > > On Tue, Jun 21, 2022 at 01:23:30PM +0200, Robert Marko wrote: > > > IPQ8074 has one Gen2 and one Gen3 port, currently the Gen2 port will > > > cause the system to hang as its using DBI registers in the .init > > > and those are only accesible after phy_power_on(). > > But I also see DBI register accesses in other .init() functions: > > > > qcom_pcie_init_2_1_0 > > qcom_pcie_init_1_0_0 (oddly out of order) > > qcom_pcie_init_2_3_2 > > qcom_pcie_init_2_4_0 > > > > Why do these accesses not need to be moved? I assume it's because > > pcie->phy is an optional PHY and phy_power_on() does nothing on those > > controllers? > > At least the QMP PHY driver does not implement the PHY power_on op and > instead fires everything up already at phy_init(). That may explain the > difference in behaviour here. Or maybe not, IPQ8074 appears to be using the same PHY driver. Johan
