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Date: Tue, 2 Jan 2024 07:58:07 -0800
From: Jakub Kicinski <kuba@kernel.org>
To: fuyao <fuyao@sjterm.com>
Cc: Jernej =?UTF-8?B?xaBrcmFiZWM=?= <jernej.skrabec@gmail.com>, Alexandre
 Torgue <alexandre.torgue@foss.st.com>, Jose Abreu <joabreu@synopsys.com>,
 "David S. Miller" <davem@davemloft.net>, Eric Dumazet
 <edumazet@google.com>, Paolo Abeni <pabeni@redhat.com>, Chen-Yu Tsai
 <wens@csie.org>, Samuel Holland <samuel@sholland.org>, Maxime Coquelin
 <mcoquelin.stm32@gmail.com>, netdev@vger.kernel.org,
 linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev,
 linux-stm32@st-md-mailman.stormreply.com, linux-kernel@vger.kernel.org,
 =?UTF-8?B?6bqm5YGl5bu6?= <maijianzhang@allwinnertech.com>
Subject: Re: [PATCH] gmac: sun8i: r40: add gmac tx_delay support
Message-ID: <20240102075807.1a4cac92@kernel.org>
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	<2370947.NG923GbCHz@jernej-laptop>
	<ZYPmZj8l01eQsDS5@debian.cyg>
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On Thu, 21 Dec 2023 15:16:54 +0800 fuyao wrote:
> I don't see it in the user manual also.
> 
> it works fine in 100M, but it doesn't work good in 1G without tx_delay
> in my board.
> 
> Read the sdk from allwinner I found in:
> 
> https://sourcegraph.com/github.com/tinalinux/linux-3.10/-/blob/arch/arm/boot/dts/sun8iw11p1.dtsi?L1826
> https://sourcegraph.com/github.com/tinalinux/linux-3.10@r40-v1.y/-/blob/drivers/net/ethernet/allwinner/sunxi-gmac.c?L877
> 
> And I add it to my board, it works fine.
> 
> So, I think it may be exist register but not documented.

Unless Allwinner can chime in we should at least document the situation
clearly in the commit message (incl. what HW+config was tested, exactly)
and add a comment in the code?
-- 
pw-bot: cr