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| author | Richard Zhu <[email protected]> | 2025-04-16 08:13:12 +0000 |
|---|---|---|
| committer | Manivannan Sadhasivam <[email protected]> | 2025-04-27 11:44:19 +0000 |
| commit | 744a1c20ce933dcaca0f161fe7da115902a2f343 (patch) | |
| tree | e98be9963d9be30a158a8eb62ba4f1f452d2b7d0 /drivers/pci/controller/dwc/pcie-uniphier.c | |
| parent | PCI: imx6: Add workaround for errata ERR051624 (diff) | |
| download | kernel-744a1c20ce933dcaca0f161fe7da115902a2f343.tar.gz kernel-744a1c20ce933dcaca0f161fe7da115902a2f343.zip | |
PCI: imx6: Add workaround for errata ERR051586
ERR051586: Compliance with 8GT/s Receiver Impedance ECN.
The default value of GEN3_RELATED_OFF[GEN3_ZRXDC_NONCOMPL] is 1 which
makes receiver non-compliant with the ZRX-DC parameter for 2.5 GT/s when
operating at 8 GT/s or higher. It causes unnecessary timeout in L1.
So the workaround is to set GEN3_RELATED_OFF[GEN3_ZRXDC_NONCOMPL] to 0.
Add this workaround in the dw_pcie_host_ops::post_init() callback for
i.MX95 platforms.
Signed-off-by: Richard Zhu <[email protected]>
[mani: subject and description rewording]
Signed-off-by: Manivannan Sadhasivam <[email protected]>
Reviewed-by: Frank Li <[email protected]>
Reviewed-by: Manivannan Sadhasivam <[email protected]>
Link: https://patch.msgid.link/[email protected]
Diffstat (limited to 'drivers/pci/controller/dwc/pcie-uniphier.c')
0 files changed, 0 insertions, 0 deletions