Commit 679ec639 authored by Shawn Lin's avatar Shawn Lin Committed by Manivannan Sadhasivam
Browse files

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: default avatarShawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: default avatarManivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/1765503205-22184-1-git-send-email-shawn.lin@rock-chips.com
parent 6a139499

drivers/pci/controller/dwc/pcie-designware-debugfs.c

+2 −0
Original line number Diff line number Diff line
@@ -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;

drivers/pci/controller/dwc/pcie-designware.h

+4 −0
Original line number Diff line number Diff line
@@ -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,

};