Re: [PATCH] ARC: [plat-hsdk]: Switch ethernet phy-mode to rgmii-id

2020-09-01 Thread Alexey Brodkin 
Hi Vineet, Evgeniy!

> From: Vineet Gupta 
> Sent: Tuesday, September 1, 2020 9:41 PM
> To: Evgeniy Didin ; linux-snps-arc@lists.infradead.org 
> 
> Cc: Alexey Brodkin ; Eugeniy Paltsev 
> 
> Subject: Re: [PATCH] ARC: [plat-hsdk]: Switch ethernet phy-mode to rgmii-id 
>  
> On 7/7/20 8:38 AM, Evgeniy Didin wrote:
> > HSDK board has Micrel KSZ9031, recent commit
> > bcf3440c6dd ("net: phy: micrel: add phy-mode support for the KSZ9031 PHY")
> > caused a breakdown of Ethernet.
> > Using 'phy-mode = "rgmii"' is not correct because accodring RGMII
> > specification it is necessary to have delay on RX (PHY to MAX)
> > which is not generated in case of "rgmii".
> > Using "rgmii-id" adds necessary delay and solves the issue.
> >
> > Also adding name of PHY placed on HSDK board.
> >
> > Signed-off-by: Evgeniy Didin 
> > Cc: Eugeniy Paltsev 
> > Cc: Alexey Brodkin 
> 
> @Alexey - u ok with this change ?

Sure,

Acked-by: Alexey Brodkin 

> 
> -Vineet
> 
> > ---
> >  arch/arc/boot/dts/hsdk.dts | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts
> > index 9acbeba832c0..d6427d47e5a1 100644
> > --- a/arch/arc/boot/dts/hsdk.dts
> > +++ b/arch/arc/boot/dts/hsdk.dts
> > @@ -208,7 +208,7 @@
> >    reg = <0x8000 0x2000>;
> >    interrupts = <10>;
> >    interrupt-names = "macirq";
> > - phy-mode = "rgmii";
> > + phy-mode = "rgmii-id";
> >    snps,pbl = <32>;
> >    snps,multicast-filter-bins = <256>;
> >    clocks = <&gmacclk>;
> > @@ -226,7 +226,7 @@
> >    #address-cells = <1>;
> >    #size-cells = <0>;
> >    compatible = "snps,dwmac-mdio";
> > - phy0: ethernet-phy@0 {
> > + phy0: ethernet-phy@0 { /* Micrel KSZ9031 */
> >    reg = <0>;
> >    };
> >    };
> 
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Re: [PATCH] ARC: [plat-hsdk]: Switch ethernet phy-mode to rgmii-id

2020-09-01 Thread Vineet Gupta 
On 7/7/20 8:38 AM, Evgeniy Didin wrote:
> HSDK board has Micrel KSZ9031, recent commit
> bcf3440c6dd ("net: phy: micrel: add phy-mode support for the KSZ9031 PHY")
> caused a breakdown of Ethernet.
> Using 'phy-mode = "rgmii"' is not correct because accodring RGMII
> specification it is necessary to have delay on RX (PHY to MAX)
> which is not generated in case of "rgmii".
> Using "rgmii-id" adds necessary delay and solves the issue.
>
> Also adding name of PHY placed on HSDK board.
>
> Signed-off-by: Evgeniy Didin 
> Cc: Eugeniy Paltsev 
> Cc: Alexey Brodkin 

@Alexey - u ok with this change ?

-Vineet

> ---
>  arch/arc/boot/dts/hsdk.dts | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts
> index 9acbeba832c0..d6427d47e5a1 100644
> --- a/arch/arc/boot/dts/hsdk.dts
> +++ b/arch/arc/boot/dts/hsdk.dts
> @@ -208,7 +208,7 @@
>   reg = <0x8000 0x2000>;
>   interrupts = <10>;
>   interrupt-names = "macirq";
> - phy-mode = "rgmii";
> + phy-mode = "rgmii-id";
>   snps,pbl = <32>;
>   snps,multicast-filter-bins = <256>;
>   clocks = <&gmacclk>;
> @@ -226,7 +226,7 @@
>   #address-cells = <1>;
>   #size-cells = <0>;
>   compatible = "snps,dwmac-mdio";
> - phy0: ethernet-phy@0 {
> + phy0: ethernet-phy@0 { /* Micrel KSZ9031 */
>   reg = <0>;
>   };
>   };

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[PATCH] ARC: [plat-hsdk]: Switch ethernet phy-mode to rgmii-id

2020-07-07 Thread Evgeniy Didin 
HSDK board has Micrel KSZ9031, recent commit
bcf3440c6dd ("net: phy: micrel: add phy-mode support for the KSZ9031 PHY")
caused a breakdown of Ethernet.
Using 'phy-mode = "rgmii"' is not correct because accodring RGMII
specification it is necessary to have delay on RX (PHY to MAX)
which is not generated in case of "rgmii".
Using "rgmii-id" adds necessary delay and solves the issue.

Also adding name of PHY placed on HSDK board.

Signed-off-by: Evgeniy Didin 
Cc: Eugeniy Paltsev 
Cc: Alexey Brodkin 
---
 arch/arc/boot/dts/hsdk.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts
index 9acbeba832c0..d6427d47e5a1 100644
--- a/arch/arc/boot/dts/hsdk.dts
+++ b/arch/arc/boot/dts/hsdk.dts
@@ -208,7 +208,7 @@
reg = <0x8000 0x2000>;
interrupts = <10>;
interrupt-names = "macirq";
-   phy-mode = "rgmii";
+   phy-mode = "rgmii-id";
snps,pbl = <32>;
snps,multicast-filter-bins = <256>;
clocks = <&gmacclk>;
@@ -226,7 +226,7 @@
#address-cells = <1>;
#size-cells = <0>;
compatible = "snps,dwmac-mdio";
-   phy0: ethernet-phy@0 {
+   phy0: ethernet-phy@0 { /* Micrel KSZ9031 */
reg = <0>;
};
};
-- 
2.16.2


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