Messages in this thread Patch in this message | | | From | mohammad.athari.ismail@intel ... | Subject | [PATCH net-next] net: pcs: Enable pre-emption packet for 10/100Mbps | Date | Thu, 22 Apr 2021 15:48:51 +0800 |
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From: Mohammad Athari Bin Ismail <mohammad.athari.ismail@intel.com>
Set VR_MII_DIG_CTRL1 bit-6(PRE_EMP) to enable pre-emption packet for 10/100Mbps by default. This setting doesn`t impact pre-emption capability for other speeds.
Signed-off-by: Mohammad Athari Bin Ismail <mohammad.athari.ismail@intel.com> --- drivers/net/pcs/pcs-xpcs.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/net/pcs/pcs-xpcs.c b/drivers/net/pcs/pcs-xpcs.c index 944ba105cac1..2dbc1d46821e 100644 --- a/drivers/net/pcs/pcs-xpcs.c +++ b/drivers/net/pcs/pcs-xpcs.c @@ -66,6 +66,7 @@ /* VR_MII_DIG_CTRL1 */ #define DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW BIT(9) +#define DW_VR_MII_DIG_CTRL1_PRE_EMP BIT(6) /* VR_MII_AN_CTRL */ #define DW_VR_MII_AN_CTRL_TX_CONFIG_SHIFT 3 @@ -666,6 +667,10 @@ static int xpcs_config_aneg_c37_sgmii(struct mdio_xpcs_args *xpcs) * PHY about the link state change after C28 AN is completed * between PHY and Link Partner. There is also no need to * trigger AN restart for MAC-side SGMII. + * + * For pre-emption, the setting is :- + * 1) VR_MII_DIG_CTRL1 Bit(6) [PRE_EMP] = 1b (Enable pre-emption packet + * for 10/100Mbps) */ ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_CTRL); if (ret < 0) @@ -686,7 +691,7 @@ static int xpcs_config_aneg_c37_sgmii(struct mdio_xpcs_args *xpcs) if (ret < 0) return ret; - ret |= DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW; + ret |= (DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW | DW_VR_MII_DIG_CTRL1_PRE_EMP); return xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1, ret); } -- 2.17.1
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