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| author | Shawn Lin <shawn.lin@rock-chips.com> | 2025-12-12 04:33:24 +0300 |
|---|---|---|
| committer | Manivannan Sadhasivam <mani@kernel.org> | 2025-12-18 11:23:17 +0300 |
| commit | 679ec639f29cbdaf36bd79bf3e98240fffa335ee (patch) | |
| tree | 568e1f2a4f32eb2861542a959f7c28c118e596dd | |
| parent | 6a1394990902f0393706d7f96f58c21d88b65df7 (diff) | |
| download | linux-679ec639f29cbdaf36bd79bf3e98240fffa335ee.tar.xz | |
PCI: dwc: Add L1 Substates context to ltssm_status of debugfs
DWC core couldn't distinguish LTSSM state among L1.0, L1.1 and L1.2. But
the vendor glue driver may implement additional logic to convey this
information. So add two pseudo definitions for vendor glue drivers to
translate their internal L1 Substates for debugfs to show.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/1765503205-22184-1-git-send-email-shawn.lin@rock-chips.com
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-designware-debugfs.c | 2 | ||||
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-designware.h | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/pci/controller/dwc/pcie-designware-debugfs.c b/drivers/pci/controller/dwc/pcie-designware-debugfs.c index 0fbf86c0b97e..df98fee69892 100644 --- a/drivers/pci/controller/dwc/pcie-designware-debugfs.c +++ b/drivers/pci/controller/dwc/pcie-designware-debugfs.c @@ -485,6 +485,8 @@ static const char *ltssm_status_string(enum dw_pcie_ltssm ltssm) DW_PCIE_LTSSM_NAME(DW_PCIE_LTSSM_RCVRY_EQ1); DW_PCIE_LTSSM_NAME(DW_PCIE_LTSSM_RCVRY_EQ2); DW_PCIE_LTSSM_NAME(DW_PCIE_LTSSM_RCVRY_EQ3); + DW_PCIE_LTSSM_NAME(DW_PCIE_LTSSM_L1_1); + DW_PCIE_LTSSM_NAME(DW_PCIE_LTSSM_L1_2); default: str = "DW_PCIE_LTSSM_UNKNOWN"; break; diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index aec4af5194b5..fc9cf8ce8629 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -388,6 +388,10 @@ enum dw_pcie_ltssm { DW_PCIE_LTSSM_RCVRY_EQ2 = 0x22, DW_PCIE_LTSSM_RCVRY_EQ3 = 0x23, + /* Vendor glue drivers provide pseudo L1 substates from get_ltssm() */ + DW_PCIE_LTSSM_L1_1 = 0x141, + DW_PCIE_LTSSM_L1_2 = 0x142, + DW_PCIE_LTSSM_UNKNOWN = 0xFFFFFFFF, }; |