This series adds add equalization settings for 8.0 GT/s, and add PCIe lane equalization preset properties for 8.0 GT/s and 16.0 GT/s for sa8775p ride platform, which fix AER errors. While equalization settings for 16 GT/s have already been set, this update adds the required equalization settings for PCIe operating at 8.0 GT/s, including the configuration of shadow registers, ensuring optimal performance and stability. The DT change for sa8775p add PCIe lane equalization preset properties for 8 GT/s and 16 GT/s data rates used in lane equalization procedure. Signed-off-by: Ziyue Zhang <quic_ziyuzhan@xxxxxxxxxxx> Changes in v2: - Update code in pcie-qcom-common.c make it easier to read. (Neil) - Fix the compile error. - Link to v1: https://lore.kernel.org/all/20250604091946.1890602-1-quic_ziyuzhan@xxxxxxxxxxx Ziyue Zhang (2): PCI: qcom: Add equalization settings for 8.0 GT/s arm64: dts: qcom: sa8775p: Add PCIe lane equalization preset properties arch/arm64/boot/dts/qcom/sa8775p.dtsi | 6 ++ drivers/pci/controller/dwc/pcie-designware.h | 1 - drivers/pci/controller/dwc/pcie-qcom-common.c | 60 +++++++++++-------- drivers/pci/controller/dwc/pcie-qcom-common.h | 2 +- drivers/pci/controller/dwc/pcie-qcom-ep.c | 6 +- drivers/pci/controller/dwc/pcie-qcom.c | 6 +- 6 files changed, 49 insertions(+), 32 deletions(-) base-commit: 19272b37aa4f83ca52bdf9c16d5d81bdd1354494 -- 2.34.1
