net/bnxt: fix speed autonegotiation

[ upstream commit 34a0759 ]

The "active_fec_signal_mode" in HWRM_PORT_PHY_QCFG response
does not return correct value till the link is up. Driver cannot
rely on active_fec_signal_mode while setting autoneg speed.

While setting autoneg speed, driver is currently checking only
"auto_link_speed_mask". Fixed to check "auto_pam4_link_speed_mask"
as well. Also, while setting auto mode and setting speed mask,
driver will have to set both NRZ and PAM4 mask.

Fixes: c23f9de ("net/bnxt: support 200G PAM4 link")

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>

drivers/net/bnxt/bnxt_hwrm.c

@@ -1424,17 +1424,17 @@ static int bnxt_hwrm_port_phy_cfg(struct bnxt *bp, struct bnxt_link_info *conf)
 			}
 		}
 		/* AutoNeg - Advertise speeds specified. */
-		if (conf->auto_link_speed_mask &&
+		if ((conf->auto_link_speed_mask || conf->auto_pam4_link_speed_mask) &&
 		    !(conf->phy_flags & HWRM_PORT_PHY_CFG_INPUT_FLAGS_FORCE)) {
 			req.auto_mode =
 				HWRM_PORT_PHY_CFG_INPUT_AUTO_MODE_SPEED_MASK;
-			if (conf->auto_pam4_link_speed_mask &&
-			    bp->link_info->link_signal_mode) {
+			if (conf->auto_pam4_link_speed_mask) {
 				enables |=
 				HWRM_PORT_PHY_CFG_IN_EN_AUTO_PAM4_LINK_SPD_MASK;
 				req.auto_link_pam4_speed_mask =
 				rte_cpu_to_le_16(conf->auto_pam4_link_speed_mask);
-			} else {
+			}
+			if (conf->auto_link_speed_mask) {
 				enables |=
 				HWRM_PORT_PHY_CFG_IN_EN_AUTO_LINK_SPEED_MASK;
 				req.auto_link_speed_mask =