[PATCH net] net: lan966x: Fix port configuration when using SGMII interface

[PATCH net] net: lan966x: Fix port configuration when using SGMII interface

[Horatiu Vultur]

In case the interface between the MAC and the PHY is SGMII, then the bit
GIGA_MODE on the MAC side needs to be set regardless of the speed at
which it is running.

Fixes: d28d6d2e37d1 ("net: lan966x: add port module support")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
---
 drivers/net/ethernet/microchip/lan966x/lan966x_port.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_port.c b/drivers/net/ethernet/microchip/lan966x/lan966x_port.c
index 92108d354051c..975a6d64a2e18 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_port.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_port.c
@@ -170,7 +170,8 @@ static void lan966x_port_link_up(struct lan966x_port *port)
 	/* Also the GIGA_MODE_ENA(1) needs to be set regardless of the
 	 * port speed for QSGMII ports.
 	 */
-	if (phy_interface_num_ports(config->portmode) == 4)
+	if (phy_interface_num_ports(config->portmode) == 4 ||
+	    config->portmode == PHY_INTERFACE_MODE_SGMII)
 		mode = DEV_MAC_MODE_CFG_GIGA_MODE_ENA_SET(1);
 
 	lan_wr(config->duplex | mode,
-- 
2.34.1

Re: [PATCH net] net: lan966x: Fix port configuration when using SGMII interface

[Maxime Chevallier]

Hello Horatiu,

On Tue, 23 Jan 2024 09:15:14 +0100
Horatiu Vultur <horatiu.vultur@microchip.com> wrote:

> In case the interface between the MAC and the PHY is SGMII, then the bit
> GIGA_MODE on the MAC side needs to be set regardless of the speed at
> which it is running.
> 
> Fixes: d28d6d2e37d1 ("net: lan966x: add port module support")
> Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
> ---
>  drivers/net/ethernet/microchip/lan966x/lan966x_port.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_port.c b/drivers/net/ethernet/microchip/lan966x/lan966x_port.c
> index 92108d354051c..975a6d64a2e18 100644
> --- a/drivers/net/ethernet/microchip/lan966x/lan966x_port.c
> +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_port.c
> @@ -170,7 +170,8 @@ static void lan966x_port_link_up(struct lan966x_port *port)
>  	/* Also the GIGA_MODE_ENA(1) needs to be set regardless of the
>  	 * port speed for QSGMII ports.

Small nit, I think this comment above the test could also be updated to
reflect that change.

>  	 */
> -	if (phy_interface_num_ports(config->portmode) == 4)
> +	if (phy_interface_num_ports(config->portmode) == 4 ||
> +	    config->portmode == PHY_INTERFACE_MODE_SGMII)
>  		mode = DEV_MAC_MODE_CFG_GIGA_MODE_ENA_SET(1);
>  
>  	lan_wr(config->duplex | mode,

Besides that,

Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>

Thanks,

Maxime

Re: [PATCH net] net: lan966x: Fix port configuration when using SGMII interface

[Horatiu Vultur]

The 01/23/2024 09:48, Maxime Chevallier wrote:
> 
> Hello Horatiu,

Hi Maxime,

> 
> On Tue, 23 Jan 2024 09:15:14 +0100
> Horatiu Vultur <horatiu.vultur@microchip.com> wrote:
> 
> > In case the interface between the MAC and the PHY is SGMII, then the bit
> > GIGA_MODE on the MAC side needs to be set regardless of the speed at
> > which it is running.
> >
> > Fixes: d28d6d2e37d1 ("net: lan966x: add port module support")
> > Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
> > ---
> >  drivers/net/ethernet/microchip/lan966x/lan966x_port.c | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_port.c b/drivers/net/ethernet/microchip/lan966x/lan966x_port.c
> > index 92108d354051c..975a6d64a2e18 100644
> > --- a/drivers/net/ethernet/microchip/lan966x/lan966x_port.c
> > +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_port.c
> > @@ -170,7 +170,8 @@ static void lan966x_port_link_up(struct lan966x_port *port)
> >       /* Also the GIGA_MODE_ENA(1) needs to be set regardless of the
> >        * port speed for QSGMII ports.
> 
> Small nit, I think this comment above the test could also be updated to
> reflect that change.

Ah... yes, you are right. I will update this in the next version.

> 
> >        */
> > -     if (phy_interface_num_ports(config->portmode) == 4)
> > +     if (phy_interface_num_ports(config->portmode) == 4 ||
> > +         config->portmode == PHY_INTERFACE_MODE_SGMII)
> >               mode = DEV_MAC_MODE_CFG_GIGA_MODE_ENA_SET(1);
> >
> >       lan_wr(config->duplex | mode,
> 
> Besides that,
> 
> Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
> 
> Thanks,
> 
> Maxime

-- 
/Horatiu