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[v1,0/2] 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

Message ID 20250604091946.1890602-1-quic_ziyuzhan@quicinc.com
Headers show
Series 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 | expand

Message

Ziyue Zhang June 4, 2025, 9:19 a.m. UTC 
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@quicinc.com>

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         |  8 +++
 drivers/pci/controller/dwc/pcie-designware.h  |  1 -
 drivers/pci/controller/dwc/pcie-qcom-common.c | 55 ++++++++++---------
 drivers/pci/controller/dwc/pcie-qcom-common.h |  2 +-
 drivers/pci/controller/dwc/pcie-qcom.c        |  3 +-
 5 files changed, 40 insertions(+), 29 deletions(-)


base-commit: 911483b25612c8bc32a706ba940738cc43299496