Hi Stefan, On Mon, Feb 18, 2019 at 11:08:34AM +0000, Stefan Chulski wrote: > HW recommendation upon Serdes reconfiguration are the following: > > 1. Disable port(CTRL0_REG - in XLG/GMAC) > 2. Put port in reset (both XLG/GMAC) > 3. For KR - put in reset MPCS (MAC control clock, RX SD clock, TX SD clock), > XPSC is RXAUI/XAUI clock domain > 4. Power down Serdes lane > > Do reconfiguration of Serdes. > > 5. Enable Serdes lane > 6. Disable MPCS reset for KR > 7. Disable port reset (both XLG/GMAC) > 8. Enable port (both XLG/GMAC)
For clarity, presumably either the XLG or the GMAC should be released from reset and enabled at any one time depending on the configured mode, but never both together? -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up According to speedtest.net: 11.9Mbps down 500kbps up
