Re: [PATCH v2] PCI: qcom: Use default config space read function

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Hi Marc,

On 13/03/2019 11:45, Marc Gonzalez wrote:
We don't need to fudge the device class in qcom_pcie_rd_own_conf()
because dw_pcie_setup_rc() already does the right thing:

	/* Program correct class for RC */
	dw_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2, PCI_CLASS_BRIDGE_PCI);

Signed-off-by: Marc Gonzalez <marc.w.gonzalez@xxxxxxx>
---
Changes from v1 to v2: Completely drop qcom_pcie_rd_own_conf
Srinivas, could you test this patch on apq/ipq8064?
---
  drivers/pci/controller/dwc/pcie-qcom.c | 17 -----------------
  1 file changed, 17 deletions(-)

I tried this patch on IFC6410 board which has APQ8064, and the pci does not work anymore after applying this patch.

non-working output of 'lspci -vvv' https://paste.ubuntu.com/p/ndmdsW4zkJ/ and bootlog ahttps://paste.ubuntu.com/p/CqVzGymnq8/

working without patch : https://paste.ubuntu.com/p/TJm4hgjGW4/

I have not debugged it any further other than just testing the patch.
Let me know if you need any more dumps for more debug.

Thanks,
srini

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 3de5510fd3d5..d0c5c7616b3e 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1131,25 +1131,8 @@ static int qcom_pcie_host_init(struct pcie_port *pp)
  	return ret;
  }
-static int qcom_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
-				 u32 *val)
-{
-	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
-
-	/* the device class is not reported correctly from the register */
-	if (where == PCI_CLASS_REVISION && size == 4) {
-		*val = readl(pci->dbi_base + PCI_CLASS_REVISION);
-		*val &= 0xff;	/* keep revision id */
-		*val |= PCI_CLASS_BRIDGE_PCI << 16;
-		return PCIBIOS_SUCCESSFUL;
-	}
-
-	return dw_pcie_read(pci->dbi_base + where, size, val);
-}
-
  static const struct dw_pcie_host_ops qcom_pcie_dw_ops = {
  	.host_init = qcom_pcie_host_init,
-	.rd_own_conf = qcom_pcie_rd_own_conf,
  };
/* Qcom IP rev.: 2.1.0 Synopsys IP rev.: 4.01a */




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