From: Kurt Kanzenbach <kurt@linutronix.de>
To: Alexandre Torgue <alexandre.torgue@foss.st.com>,
Jose Abreu <joabreu@synopsys.com>
Cc: "David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
netdev@vger.kernel.org, Johannes Zink <j.zink@pengutronix.de>,
Richard Cochran <richardcochran@gmail.com>,
Kurt Kanzenbach <kurt@linutronix.de>
Subject: [PATCH net-next] stmmac: intel: Enable correction of MAC propagation delay
Date: Fri, 18 Aug 2023 13:14:01 +0200 [thread overview]
Message-ID: <20230818111401.77962-1-kurt@linutronix.de> (raw)
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 <kurt@linutronix.de>
---
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 979c755964b1..a3a249c63598 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;
--
2.39.2
next reply other threads:[~2023-08-18 11:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-18 11:14 Kurt Kanzenbach [this message]
2023-08-18 12:16 ` [PATCH net-next] stmmac: intel: Enable correction of MAC propagation delay Johannes Zink
2023-08-19 18:34 ` patchwork-bot+netdevbpf
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