From 58f2ffdedf7b05b318f2cdafaca69e4435c8478e Mon Sep 17 00:00:00 2001 From: Kurt Kanzenbach Date: Fri, 18 Aug 2023 13:14:01 +0200 Subject: [PATCH] stmmac: intel: Enable correction of MAC propagation delay All captured timestamps should be corrected by PHY, MAC and CDC introduced latency/errors. The CDC correction is already used. Enable MAC propagation delay correction as well which is available since commit 26cfb838aa00 ("net: stmmac: correct MAC propagation delay"). Before: |ptp4l[390.458]: rms 7 max 21 freq +177 +/- 14 delay 357 +/- 1 After: |ptp4l[620.012]: rms 7 max 20 freq +195 +/- 14 delay 345 +/- 1 Tested on Intel Elkhart Lake. Signed-off-by: Kurt Kanzenbach Reviewed-by: Johannes Zink Signed-off-by: David S. Miller --- drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c index 979c755..a3a249c 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c @@ -627,6 +627,7 @@ static int ehl_common_data(struct pci_dev *pdev, plat->rx_queues_to_use = 8; plat->tx_queues_to_use = 8; plat->flags |= STMMAC_FLAG_USE_PHY_WOL; + plat->flags |= STMMAC_FLAG_HWTSTAMP_CORRECT_LATENCY; plat->safety_feat_cfg->tsoee = 1; plat->safety_feat_cfg->mrxpee = 1; -- 2.7.4