diff options
| author | Raju Rangoju <Raju.Rangoju@amd.com> | 2022-10-20 09:42:13 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-10-22 08:40:22 +0300 |
| commit | fc75c032aee63e60170d80f44c8567ea45fc59da (patch) | |
| tree | 788dfb651a8a2a5a34446124154d4a462b48a5bc /drivers/net/ethernet/amd | |
| parent | 1246d0862349f36b65db1043d27c466af930047d (diff) | |
| download | linux-fc75c032aee63e60170d80f44c8567ea45fc59da.tar.xz | |
amd-xgbe: enable PLL_CTL for fixed PHY modes only
PLL control setting(RRC) is needed only in fixed PHY configuration to
fix the peer-peer issues. Without the PLL control setting, the link up
takes longer time in a fixed phy configuration.
Driver implements SW RRC for Autoneg On configuration, hence PLL control
setting (RRC) is not needed for AN On configuration, and can be skipped.
Also, PLL re-initialization is not needed for PHY Power Off and RRC
commands. Otherwise, they lead to mailbox errors. Added the changes
accordingly.
Fixes: daf182d360e5 ("net: amd-xgbe: Toggle PLL settings during rate change")
Signed-off-by: Raju Rangoju <Raju.Rangoju@amd.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/amd')
| -rw-r--r-- | drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c index 8cf5d81fca36..349ba0dc1fa2 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c @@ -1979,6 +1979,10 @@ static void xgbe_phy_rx_reset(struct xgbe_prv_data *pdata) static void xgbe_phy_pll_ctrl(struct xgbe_prv_data *pdata, bool enable) { + /* PLL_CTRL feature needs to be enabled for fixed PHY modes (Non-Autoneg) only */ + if (pdata->phy.autoneg != AUTONEG_DISABLE) + return; + XMDIO_WRITE_BITS(pdata, MDIO_MMD_PMAPMD, MDIO_VEND2_PMA_MISC_CTRL0, XGBE_PMA_PLL_CTRL_MASK, enable ? XGBE_PMA_PLL_CTRL_ENABLE @@ -2029,8 +2033,10 @@ static void xgbe_phy_perform_ratechange(struct xgbe_prv_data *pdata, xgbe_phy_rx_reset(pdata); reenable_pll: - /* Enable PLL re-initialization */ - xgbe_phy_pll_ctrl(pdata, true); + /* Enable PLL re-initialization, not needed for PHY Power Off and RRC cmds */ + if (cmd != XGBE_MB_CMD_POWER_OFF && + cmd != XGBE_MB_CMD_RRC) + xgbe_phy_pll_ctrl(pdata, true); } static void xgbe_phy_rrc(struct xgbe_prv_data *pdata) |