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net: stmmac: do not stop RX_CLK in Rx LPI state for qcs404 SoC 

Currently in phy_init_eee() the driver unconditionally configures the PHY
to stop RX_CLK after entering Rx LPI state. This causes an LPI interrupt
storm on my qcs404-base board.

Change the PHY initialization so that for "qcom,qcs404-ethqos" compatible
device RX_CLK continues to run even in Rx LPI state.

Signed-off-by: Andrey Konovalov <andrey.konovalov@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrey Konovalov 2023-01-27 00:35:39 +03:00 committed by David S. Miller
parent a6efc42a86
commit 54aa39a513
3 changed files with 5 additions and 1 deletions
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2
drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
View File

@ -560,6 +560,8 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
plat_dat->has_gmac4 = 1;
plat_dat->pmt = 1;
plat_dat->tso_en = of_property_read_bool(np, "snps,tso");
if (of_device_is_compatible(np, "qcom,qcs404-ethqos"))
plat_dat->rx_clk_runs_in_lpi = 1;
ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
if (ret)

3
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
View File

@ -1080,7 +1080,8 @@ static void stmmac_mac_link_up(struct phylink_config *config,
stmmac_mac_set(priv, priv->ioaddr, true);
if (phy && priv->dma_cap.eee) {
priv->eee_active = phy_init_eee(phy, 1) >= 0;
priv->eee_active =
phy_init_eee(phy, !priv->plat->rx_clk_runs_in_lpi) >= 0;
priv->eee_enabled = stmmac_eee_init(priv);
priv->tx_lpi_enabled = priv->eee_enabled;
stmmac_set_eee_pls(priv, priv->hw, true);

1
include/linux/stmmac.h
View File

@ -252,6 +252,7 @@ struct plat_stmmacenet_data {
int rss_en;
int mac_port_sel_speed;
bool en_tx_lpi_clockgating;
bool rx_clk_runs_in_lpi;
int has_xgmac;
bool vlan_fail_q_en;
u8 vlan_fail_q;