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Merge branch 'pci/controller/tegra194'

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- Revert "PCI: tegra194: Enable support for 256 Byte payload" because Linux
  doesn't know how to reduce MPS from to 256 to 128 bytes for Endpoints
  below a Switch (because other devices below the Switch might already be
  operating), which leads to Malformed TLP errors (Vidya Sagar)

* pci/controller/tegra194:
  Revert "PCI: tegra194: Enable support for 256 Byte payload"
This commit is contained in:
Bjorn Helgaas 2023-08-29 11:03:55 -05:00
commit 5ffe43c027
1 changed files with 0 additions and 10 deletions
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10
drivers/pci/controller/dwc/pcie-tegra194.c
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@ -900,11 +900,6 @@ static int tegra_pcie_dw_host_init(struct dw_pcie_rp *pp)
pcie->pcie_cap_base = dw_pcie_find_capability(&pcie->pci,
PCI_CAP_ID_EXP);
val_16 = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + PCI_EXP_DEVCTL);
val_16 &= ~PCI_EXP_DEVCTL_PAYLOAD;
val_16 |= PCI_EXP_DEVCTL_PAYLOAD_256B;
dw_pcie_writew_dbi(pci, pcie->pcie_cap_base + PCI_EXP_DEVCTL, val_16);
val = dw_pcie_readl_dbi(pci, PCI_IO_BASE);
val &= ~(IO_BASE_IO_DECODE | IO_BASE_IO_DECODE_BIT8);
dw_pcie_writel_dbi(pci, PCI_IO_BASE, val);
@ -1887,11 +1882,6 @@ static void pex_ep_event_pex_rst_deassert(struct tegra_pcie_dw *pcie)
pcie->pcie_cap_base = dw_pcie_find_capability(&pcie->pci,
PCI_CAP_ID_EXP);
val_16 = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + PCI_EXP_DEVCTL);
val_16 &= ~PCI_EXP_DEVCTL_PAYLOAD;
val_16 |= PCI_EXP_DEVCTL_PAYLOAD_256B;
dw_pcie_writew_dbi(pci, pcie->pcie_cap_base + PCI_EXP_DEVCTL, val_16);
/* Clear Slot Clock Configuration bit if SRNS configuration */
if (pcie->enable_srns) {
val_16 = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base +