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pci: tegra: update lanes when incorrect

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This commit is contained in:
Thomas Makin
2025-12-02 02:06:18 +00:00
parent 335d7b24e1
commit 201a374323
1 changed files with 29 additions and 3 deletions
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32
drivers/pci/controller/pci-tegra.c
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@@ -2171,6 +2171,15 @@ static void tegra_pcie_disable_interrupts(struct tegra_pcie *pcie)
afi_writel(pcie, value, AFI_INTR_MASK);
}
static void update_rp_lanes(struct tegra_pcie *pcie, u32 lanes)
{
struct tegra_pcie_port *port = NULL;
list_for_each_entry(port, &pcie->ports, list)
port->lanes = (lanes >> (port->index << 3)) & 0xFF;
}
static int tegra_pcie_get_xbar_config(struct tegra_pcie *pcie, u32 lanes,
u32 *xbar)
{
@@ -2199,12 +2208,22 @@ static int tegra_pcie_get_xbar_config(struct tegra_pcie *pcie, u32 lanes,
"switching to default 2x1, 1x1, 1x1 "
"configuration\n");
*xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_211;
update_rp_lanes(pcie, 0x010102);
return 0;
}
} else if (of_device_is_compatible(np, "nvidia,tegra210b01-pcie")) {
dev_info(dev, "4x1, 1x1 configuration\n");
*xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_X4_X1;
return 0;
switch (lanes) {
case 0x0104:
dev_info(dev, "4x1, 1x1 configuration\n");
*xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_X4_X1;
return 0;
default:
dev_info(dev, "wrong configuration updated in DT, "
"switching to default 4x1, 1x1 configuration\n");
*xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_X4_X1;
update_rp_lanes(pcie, 0x0104);
return 0;
}
} else if (of_device_is_compatible(np, "nvidia,tegra124-pcie") ||
of_device_is_compatible(np, "nvidia,tegra210-pcie")) {
switch (lanes) {
@@ -2217,6 +2236,13 @@ static int tegra_pcie_get_xbar_config(struct tegra_pcie *pcie, u32 lanes,
dev_info(dev, "2x1, 1x1 configuration\n");
*xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_X2_X1;
return 0;
default:
dev_info(dev, "wrong configuration updated in DT, "
"switching to default 4x1, 1x1 configuration\n");
*xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_X4_X1;
update_rp_lanes(pcie, 0x0104);
return 0;
}
} else if (of_device_is_compatible(np, "nvidia,tegra30-pcie")) {
switch (lanes) {