[PATCH v2 03/20] net/ngbe: add missing CDR config for YT PHY

[Zaiyu Wang]

According to the PHY vendor, when YT8531S operates in UTP-to-Fiber or
RGMII-to-Fiber mode with auto-negotiation disabled (Force mode),
additional CDR (Clock Data Recovery) configuration is required to
improve link connectivity. Without this config, link may be unstable
or fail to establish.

Fixes: f1268369403d ("net/ngbe: support autoneg on/off for external PHY SFI mode")
Cc: stable at dpdk.org

Signed-off-by: Zaiyu Wang <zaiyuwang at trustnetic.com>
---
 drivers/net/ngbe/base/ngbe_phy_yt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ngbe/base/ngbe_phy_yt.c b/drivers/net/ngbe/base/ngbe_phy_yt.c
index d110fbc8b2..ab0778d246 100644
--- a/drivers/net/ngbe/base/ngbe_phy_yt.c
+++ b/drivers/net/ngbe/base/ngbe_phy_yt.c
@@ -264,6 +264,9 @@ s32 ngbe_setup_phy_link_yt(struct ngbe_hw *hw, u32 speed,
 			value = YT_BCR_RESET | YT_BCR_ANE | YT_BCR_RESTART_AN |
 				YT_BCR_DUPLEX | YT_BCR_SPEED_SELECT1;
 		} else {
+			/* force mode need to config cdr */
+			ngbe_write_phy_reg_sds_ext_yt(hw, 0x3, 0, 0x1434);
+			ngbe_write_phy_reg_sds_ext_yt(hw, 0xe, 0, 0x163);
 			value = YT_BCR_RESET | YT_BCR_DUPLEX;
 			if (speed & NGBE_LINK_SPEED_1GB_FULL)
 				value |= YT_BCR_SPEED_SELECT1;
-- 
2.21.0.windows.1