Enables advertisement of ASPM-L1 support in capability
registers of applicable Tegra chips
Signed-off-by: Vidya Sagar <vidyas@xxxxxxxxxx>
---
drivers/pci/host/pci-tegra.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
index adae03d671ab..e1526cc5d381 100644
--- a/drivers/pci/host/pci-tegra.c
+++ b/drivers/pci/host/pci-tegra.c
@@ -226,6 +226,9 @@
#define RP_VEND_XP_UPDATE_FC_THRESHOLD_MASK (0xff << 18)
#define RP_VEND_XP_UPDATE_FC_THRESHOLD_T210 (0x60 << 18)
+#define RP_VEND_XP1 0xf04
+#define RP_VEND_XP1_LINK_PVT_CTL_L1_ASPM_SUPPORT BIT(21)
+
#define RP_VEND_CTL0 0xf44
#define RP_VEND_CTL0_DSK_RST_PULSE_WIDTH_MASK (0xf << 12)
#define RP_VEND_CTL0_DSK_RST_PULSE_WIDTH (0x9 << 12)
@@ -327,6 +330,7 @@ struct tegra_pcie_soc {
bool RAW_violation_fixup;
bool program_deskew_time;
bool updateFC_threshold;
+ bool has_aspm_l1;
};
static inline struct tegra_msi *to_tegra_msi(struct msi_controller *chip)
@@ -2188,6 +2192,13 @@ static void tegra_pcie_enable_rp_features(struct tegra_pcie_port *port)
value = readl(port->base + RP_VEND_CTL1);
value |= RP_VEND_CTL1_ERPT;
writel(value, port->base + RP_VEND_CTL1);
+
+ if (port->pcie->soc->has_aspm_l1) {
+ /* Advertise ASPM-L1 state capability*/
+ value = readl(port->base + RP_VEND_XP1);
+ value |= RP_VEND_XP1_LINK_PVT_CTL_L1_ASPM_SUPPORT;
+ writel(value, port->base + RP_VEND_XP1);
+ }
}
static void tegra_pcie_apply_sw_fixup(struct tegra_pcie_port *port)
@@ -2391,6 +2402,7 @@ static const struct tegra_pcie_soc tegra20_pcie = {
.RAW_violation_fixup = false,
.program_deskew_time = false,
.updateFC_threshold = false,
+ .has_aspm_l1 = false,
};
static const struct tegra_pcie_soc tegra30_pcie = {
@@ -2412,6 +2424,7 @@ static const struct tegra_pcie_soc tegra30_pcie = {
.RAW_violation_fixup = false,
.program_deskew_time = false,
.updateFC_threshold = false,
+ .has_aspm_l1 = true,
};
static const struct tegra_pcie_soc tegra124_pcie = {
@@ -2432,6 +2445,7 @@ static const struct tegra_pcie_soc tegra124_pcie = {
.RAW_violation_fixup = true,
.program_deskew_time = false,
.updateFC_threshold = false,
+ .has_aspm_l1 = true,
};
static const struct tegra_pcie_soc tegra210_pcie = {
@@ -2460,6 +2474,7 @@ static const struct tegra_pcie_soc tegra210_pcie = {
.RAW_violation_fixup = false,
.program_deskew_time = true,
.updateFC_threshold = true,
+ .has_aspm_l1 = true,
};
static const struct tegra_pcie_soc tegra186_pcie = {
@@ -2481,6 +2496,7 @@ static const struct tegra_pcie_soc tegra186_pcie = {
.RAW_violation_fixup = false,
.program_deskew_time = false,
.updateFC_threshold = false,
+ .has_aspm_l1 = true,
};
static const struct of_device_id tegra_pcie_of_match[] = {
--
2.7.4
--
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