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From: Icenowy Zheng <icenowy@aosc.io>
To: jernej.skrabec@siol.net,
	"Jernej Škrabec" <jernej.skrabec@siol.net>,
	wens@kernel.org, "Maxime Ripard" <mripard@kernel.org>
Cc: linux-sunxi@googlegroups.com, Chen-Yu Tsai <wens@csie.org>,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: Re: [linux-sunxi] [PATCH 02/10] ARM: dts: sun6i: a31-hummingbird: Enable RGMII RX/TX delay on Ethernet PHY
Date: Sun, 25 Oct 2020 02:39:05 +0800
Message-ID: <9D317C52-5F28-41A9-80DA-DBADA142B042@aosc.io> (raw)
In-Reply-To: <2859076.BEgH6Mo0Pn@jernej-laptop>



于 2020年10月25日 GMT+08:00 上午2:30:35, "Jernej Škrabec" <jernej.skrabec@siol.net> 写到:
>Dne sobota, 24. oktober 2020 ob 19:51:06 CEST je Icenowy Zheng
>napisal(a):
>> 在 2020-10-25星期日的 00:25 +0800,Chen-Yu Tsai写道:
>> 
>> > From: Chen-Yu Tsai <wens@csie.org>
>> > 
>> > The Ethernet PHY on the A31 Hummingbird has the RX and TX delays
>> > enabled on the PHY, using pull-ups on the RXDLY and TXDLY pins.
>> > 
>> > Fix the phy-mode description to correct reflect this so that the
>> > implementation doesn't reconfigure the delays incorrectly. This
>> > happened with commit bbc4d71d6354 ("net: phy: realtek: fix rtl8211e
>> > rx/tx delay config").
>> 
>> Personally I think they should revert this commit, and consider other
>> solution.
>> 
>> This commit breaks everything.
>> 
>
>Previously broken driver allowed inproper DT to work, so you have to
>fix 
>everything eventually.

There is no "improper DT" if it's already shipped, DT should suffer driver
change, not changed to match driver.

I think at least Fedora tends to ship a DT with a system image that will
not get updated when kernel gets updated.

>
>Plus side, there is no need to have hack for Pine64 Plus ethernet
>anymore.
>
>Best regards,
>Jernej
>
>> (Although the patch on individual DT patches are technically correct)
>> 
>> > Fixes: c220aec2bb79 ("ARM: dts: sun6i: Add Merrii A31 Hummingbird
>> > support")
>> > Signed-off-by: Chen-Yu Tsai <wens@csie.org>
>> > ---
>> > 
>> >  arch/arm/boot/dts/sun6i-a31-hummingbird.dts | 2 +-
>> >  1 file changed, 1 insertion(+), 1 deletion(-)
>> > 
>> > diff --git a/arch/arm/boot/dts/sun6i-a31-hummingbird.dts
>> > b/arch/arm/boot/dts/sun6i-a31-hummingbird.dts
>> > index 049e6ab3cf56..73de34ae37fd 100644
>> > --- a/arch/arm/boot/dts/sun6i-a31-hummingbird.dts
>> > +++ b/arch/arm/boot/dts/sun6i-a31-hummingbird.dts
>> > @@ -154,7 +154,7 @@ &gmac {
>> > 
>> >  	pinctrl-names = "default";
>> >  	pinctrl-0 = <&gmac_rgmii_pins>;
>> >  	phy-handle = <&phy1>;
>> > 
>> > -	phy-mode = "rgmii";
>> > +	phy-mode = "rgmii-id";
>> > 
>> >  	status = "okay";
>> >  
>> >  };

  reply index

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-24 16:25 [PATCH 01/10] Revert "arm: sun8i: orangepi-pc-plus: Set EMAC activity LEDs to active high" Chen-Yu Tsai
2020-10-24 16:25 ` [PATCH 02/10] ARM: dts: sun6i: a31-hummingbird: Enable RGMII RX/TX delay on Ethernet PHY Chen-Yu Tsai
2020-10-24 17:51   ` [linux-sunxi] " Icenowy Zheng
2020-10-24 18:30     ` Jernej Škrabec
2020-10-24 18:39       ` Icenowy Zheng [this message]
2020-10-24 19:09         ` Clément Péron
2020-10-26  7:38         ` Ard Biesheuvel
2020-10-25  8:58   ` Jernej Škrabec
2020-10-24 16:25 ` [PATCH 03/10] ARM: dts: sun7i: cubietruck: " Chen-Yu Tsai
2020-10-24 17:04   ` [linux-sunxi] " Emilio López
2020-10-24 16:25 ` [PATCH 04/10] ARM: dts: sun7i: bananapi-m1-plus: " Chen-Yu Tsai
2020-10-25  8:51   ` Jernej Škrabec
2020-10-24 16:25 ` [PATCH 05/10] ARM: dts: sun8i: h3: orangepi-plus2e: " Chen-Yu Tsai
2020-10-25  7:53   ` Jernej Škrabec
2020-10-24 16:25 ` [PATCH 06/10] ARM: dts: sun8i: a83t: Enable both " Chen-Yu Tsai
2020-10-25  8:48   ` Jernej Škrabec
2020-10-24 16:25 ` [PATCH 07/10] ARM: dts: sun9i: " Chen-Yu Tsai
2020-10-25  8:40   ` Jernej Škrabec
2020-10-24 16:25 ` [PATCH 08/10] ARM: dts: sunxi: bananapi-m2-plus: Enable " Chen-Yu Tsai
2020-10-25  8:01   ` Jernej Škrabec
2020-10-24 16:25 ` [PATCH 09/10] arm64: dts: allwinner: h5: libretech-all-h5-cc: Enable RGMII RX/TX delay on PHY Chen-Yu Tsai
2020-10-25  9:02   ` Jernej Škrabec
2020-10-24 16:25 ` [PATCH 10/10] arm64: dts: allwinner: a64: bananapi-m64: " Chen-Yu Tsai
2020-10-24 19:58   ` [linux-sunxi] " Corentin Labbe
2020-10-25  8:34     ` Jernej Škrabec
2020-10-26 10:24   ` Maxime Ripard
2020-10-25  7:35 ` [PATCH 01/10] Revert "arm: sun8i: orangepi-pc-plus: Set EMAC activity LEDs to active high" Jernej Škrabec

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