[PATCH 12/24] net/axgbe: enable PLL control for fixed PHY modes only

[Venkat Kumar Ande]

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.

Signed-off-by: Venkat Kumar Ande <venkatkumar.a...@amd.com>
---
 drivers/net/axgbe/axgbe_phy_impl.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/axgbe/axgbe_phy_impl.c 
b/drivers/net/axgbe/axgbe_phy_impl.c
index 8cc99d3a6b..ceff36df3d 100644
--- a/drivers/net/axgbe/axgbe_phy_impl.c
+++ b/drivers/net/axgbe/axgbe_phy_impl.c
@@ -1207,6 +1207,10 @@ static void axgbe_phy_rx_reset(struct axgbe_port *pdata)
 
 static void axgbe_phy_pll_ctrl(struct axgbe_port *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_SET
@@ -1251,8 +1255,10 @@ static void axgbe_phy_perform_ratechange(struct 
axgbe_port *pdata,
        axgbe_phy_rx_reset(pdata);
 
 reenable_pll:
-        /* Re-enable the PLL control */
-       axgbe_phy_pll_ctrl(pdata, true);
+       /* Enable PLL re-initialization, not needed for PHY Power Off and RRC 
cmds */
+       if (cmd != AXGBE_MB_CMD_POWER_OFF &&
+           cmd != AXGBE_MB_CMD_RRC)
+               axgbe_phy_pll_ctrl(pdata, true);
 
        PMD_DRV_LOG(NOTICE, "firmware mailbox command did not complete\n");
 }
-- 
2.34.1