@@ -896,6 +896,12 @@ static void tegra_pcie_prepare_host(struct pcie_port *pp)
init_host_aspm(pcie);
+ /* Disable ASPM-L1SS advertisement if there is no CLKREQ routing */
+ if (!pcie->supports_clkreq) {
+ disable_aspm_l11(pcie);
+ disable_aspm_l12(pcie);
+ }
+
val = dw_pcie_readl_dbi(pci, GEN3_RELATED_OFF);
val &= ~GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL;
dw_pcie_writel_dbi(pci, GEN3_RELATED_OFF, val);
@@ -1400,12 +1406,6 @@ static int tegra_pcie_config_controller(struct tegra_pcie_dw *pcie,
pcie->pcie_cap_base = dw_pcie_find_capability(&pcie->pci,
PCI_CAP_ID_EXP);
- /* Disable ASPM-L1SS advertisement as there is no CLKREQ routing */
- if (!pcie->supports_clkreq) {
- disable_aspm_l11(pcie);
- disable_aspm_l12(pcie);
- }
-
return ret;
fail_phy:
If the absence of CLKREQ# signal is indicated by the absence of "supports-clkreq" in the device-tree node, current driver is disabling the advertisement of ASPM-L1 Sub-States *before* the ASPM-L1 Sub-States offset is correctly initialized. Since default value of the ASPM-L1SS offset is zero, this is causing the Vendor-ID wrongly programmed to 0x10d2 instead of Nvidia's 0x10de thereby the quirks applicable for Tegra194 are not being applied. This patch fixes this issue by refactoring the code that disables the ASPM-L1SS advertisement. Fixes: 56e15a238d92 ("PCI: tegra: Add Tegra194 PCIe support") Signed-off-by: Vidya Sagar <vidyas@nvidia.com> --- V2: * None drivers/pci/controller/dwc/pcie-tegra194.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)