Messages in this thread | | | Subject | Re: [RFC PATCH v1] PCI: qcom: Use quirk to override incorrect device class | From | Marc Gonzalez <> | Date | Tue, 12 Mar 2019 18:34:55 +0100 |
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On 12/03/2019 18:18, Marc Gonzalez wrote:
> On 12/03/2019 13:42, Stanimir Varbanov wrote: > >> I wonder, in case that dw_pcie_setup_rc() already has a write to >> PCI_CLASS_DEVICE configuration register to set it as a bridge do we >> still need to do the above fixup? > > I don't know, I don't have an affected device. Unless the msm8998 /is/ affected, > and dw_pcie_setup_rc() actually fixes it?
I think you hit the nail on the head...
If I comment out //dw_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2, PCI_CLASS_BRIDGE_PCI); from dw_pcie_setup_rc() then pci_class() returns 0xff000000 instead of 0x6040000
So perhaps you're right: the quirk can be omitted altogether. Unless it is not possible to program the device class on older chips?
Regards.
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