> -----Original Message----- > From: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> > Sent: 2025年4月2日 15:08 > To: Hongxing Zhu <hongxing.zhu@xxxxxxx> > Cc: Frank Li <frank.li@xxxxxxx>; l.stach@xxxxxxxxxxxxxx; lpieralisi@xxxxxxxxxx; > kw@xxxxxxxxx; robh@xxxxxxxxxx; bhelgaas@xxxxxxxxxx; > shawnguo@xxxxxxxxxx; s.hauer@xxxxxxxxxxxxxx; kernel@xxxxxxxxxxxxxx; > festevam@xxxxxxxxx; linux-pci@xxxxxxxxxxxxxxx; > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; imx@xxxxxxxxxxxxxxx; > linux-kernel@xxxxxxxxxxxxxxx > Subject: Re: [PATCH v3 3/6] PCI: imx6: Workaround i.MX95 PCIe may not exit L23 > ready > > On Fri, Mar 28, 2025 at 11:02:10AM +0800, Richard Zhu wrote: > > ERR051624: The Controller Without Vaux Cannot Exit L23 Ready Through > > Beacon or PERST# De-assertion > > Is it possible to share the link to the erratum? > Sorry, the erratum document isn't ready to be published yet. > > > > When the auxiliary power is not available, the controller cannot exit > > from > > L23 Ready with beacon or PERST# de-assertion when main power is not > > removed. > > > > I don't understand how the presence of Vaux affects the controller. Same goes > for PERST# deassertion. How does that relate to Vaux? Is this erratum for a > specific endpoint behavior? IMHO I don't know the exact details of the power supplies in this IP design. Refer to my guess , maybe the beacon detect or wake-up logic in designs is relied on the status of SYS_AUX_PWR_DET signals in this case. Best Regards Richard Zhu > > - Mani > > -- > மணிவண்ணன் சதாசிவம்
