From: Yixun Lan <dlan@kernel.org>
To: Andrew Rembrandt <kernel@rembrandt.dev>
Cc: Yixun Lan <dlan@kernel.org>,
linux-riscv@lists.infradead.org, spacemit@lists.linux.dev,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] riscv: dts: spacemit: k3-pico-itx: Fix non-functional ethernet TX timing
Date: Tue, 14 Jul 2026 09:08:18 +0000 [thread overview]
Message-ID: <178402007498.1567320.3036390177940599255.b4-ty@b4> (raw)
In-Reply-To: <20260608182358.170489-1-kernel@rembrandt.dev>
On Mon, 08 Jun 2026 20:23:58 +0200, Andrew Rembrandt wrote:
> The "rgmii-id" PHY mode applies a symmetric 2ns internal delay in the
> PHY. On the Pico-ITX board this leaves insufficient TX timing margin and
> no ethernet traffic passes.
>
> Add a 400ps MAC-side TX internal delay on top of the PHY's delay to
> correct the TX clock/data skew. The value follows the vendor fork's
> asymmetric tuning (tx-phase 73 x 33.3ps - 2000ps ID ~= 400ps); the
> driver rounds tx-internal-delay-ps to the nearest supported step.
>
> [...]
Applied, thanks!
[1/1] riscv: dts: spacemit: k3-pico-itx: Fix non-functional ethernet TX timing
https://git.kernel.org/pub/scm/linux/kernel/git/spacemit/linux.git/commit/?id=773a0731959424d7f82be207b64acfa5b99a4978
Best regards,
--
Yixun Lan <dlan@kernel.org>
prev parent reply other threads:[~2026-07-14 9:08 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-08 18:23 Andrew Rembrandt
2026-06-09 5:37 ` Inochi Amaoto
2026-06-09 18:24 ` Andrew Rembrandt
2026-06-09 23:14 ` Inochi Amaoto
2026-06-10 9:05 ` Andrew Rembrandt
2026-06-11 7:29 ` E Shattow
2026-07-10 2:25 ` Yixun Lan
2026-07-10 14:34 ` E Shattow
2026-07-18 9:07 ` Andrew Rembrandt
2026-07-19 10:28 ` Yixun Lan
2026-07-19 16:06 ` E Shattow
2026-07-07 7:15 ` Yixun Lan
2026-07-14 9:08 ` Yixun Lan [this message]
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