From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1F596CCA464 for ; Fri, 16 Oct 2026 11:38:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=9GRmkk0d7/PC2JYZ6s87MIdsq4qp1zD1dJ0+v2vwEqA=; b=w2VBx1kcRYqcYgTJdL+7aWP0hR /AqV68gcNZXT2HpY9U981B3e0IauDYyeQDJ5GMSgSRwffW0Us/Ij6gWh8pCJ2KBr1IS8zotC4MZZR oIo/2V7wEHxAUkAisfupj9V4ghqUxPqubRpjS85u3/Z1fdHXTdIb0Zy4Ka4wS5/4cM7M9MVFjwjD6 lDy2IwdJNoGFM4/Q7EDtHWYzYEeGQJ0TAw2s9TxM4EOk2nlpb55qTT9siI0CIM/JgnmUaaPXOc2w8 eaPQKZpNKjgrhOG3TMYjVMzVMZ9NwAflH0VFXMrIJnNBczogvvEL/oetP8WPHhlO2A/7GpWGbdclt vwHleCvw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xHgG9-00000002m76-2vPw; Fri, 16 Oct 2026 11:38:01 +0000 Received: from smtpout-02.galae.net ([185.246.84.56]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xHgG7-00000002m6K-1ewJ; Fri, 16 Oct 2026 11:38:01 +0000 Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-02.galae.net (Postfix) with ESMTPS id 1CC501A1251; Fri, 16 Oct 2026 11:37:55 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id DD40E6075D; Fri, 16 Oct 2026 11:37:54 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 38F5610328153; Fri, 16 Oct 2026 13:37:38 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1792150669; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:content-language:in-reply-to:references; bh=9GRmkk0d7/PC2JYZ6s87MIdsq4qp1zD1dJ0+v2vwEqA=; b=DOVSw9oI99DtbYEp6j/IMxmzCvhQrVrV9IRzEyczUgqy6HHPbxXruaeiDSNanNAfldxFfj QBmgYZpLAo5JLMjFMRsN65bzPuPjoadxWuVMjgEBsuc7gtos1IvD9hrJoyUjtVpc+kgvgt ojQ0upsve+H0brWS+pQEPLnkB6VmNkoUU2VfkryWBniwZnaLTRjB6UNY7Mp4QuPZiilxWd e7QnoyiDYek5sVmIs/gOKJrB3YxCnIsaJfRQRJgJbogTl2FoAKkpuqoOOY2ia5MvI2aoZD pIfHxwpdC0CsLbBbaKR1KWFR1j+JBjqgZF/zoYR8P3rco2vIudsLUJo8Tg4nXg== Message-ID: <34608ab8-18f3-4680-8276-cd8611c05cb1@bootlin.com> Date: Fri, 16 Oct 2026 13:37:37 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next v3 5/9] net: stmmac: mediatek: add RX/TX delay stage divider in platform data To: Louis-Alexis Eyraud , Andrew Lunn , "David S. Miller" , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Richard Cochran , Matthias Brugger , AngeloGioacchino Del Regno , Biao Huang , Maxime Coquelin , Alexandre Torgue , Eric Dumazet Cc: kernel@collabora.com, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com References: <20261016-dwmac-mediatek-mt8189-v3-0-25daf2bbcf35@collabora.com> <20261016-dwmac-mediatek-mt8189-v3-5-25daf2bbcf35@collabora.com> Content-Language: en-US From: Maxime Chevallier In-Reply-To: <20261016-dwmac-mediatek-mt8189-v3-5-25daf2bbcf35@collabora.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Last-TLS-Session-Version: TLSv1.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261016_043759_580955_F5D72885 X-CRM114-Status: GOOD ( 17.01 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Louis-Alexis, On 10/16/26 12:31, Louis-Alexis Eyraud wrote: > In preparation of newer SoC support, that have like MT8189 SoC > different RX and TX internal delay stage steps than MT8188/MT8195, add > the RX and TX delay stage divider values in the variant platform data > and replace the hardcoded value uses in mt2712_set_delay and > mt8195_set_delay. > > Reviewed-by: Maxime Chevallier > Signed-off-by: Louis-Alexis Eyraud > --- > .../net/ethernet/stmicro/stmmac/dwmac-mediatek.c | 46 ++++++++++++++++++---- > 1 file changed, 38 insertions(+), 8 deletions(-) > > diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c > index 596411d4a5b2..cb5bda53edb9 100644 > --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c > +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c > @@ -108,6 +108,10 @@ struct mediatek_dwmac_variant { > > u32 rx_delay_max; > u32 tx_delay_max; > + u16 rx_rmii_delay_stage_div; > + u16 tx_rmii_delay_stage_div; > + u16 rx_rgmii_delay_stage_div; > + u16 tx_rgmii_delay_stage_div; > u8 dma_bit_mask; > }; > > @@ -146,14 +150,22 @@ static int mt2712_set_delay(struct mediatek_dwmac_plat_data *plat) > u32 fine_val = 0; > > if (phy_interface_mode_is_rgmii(plat->phy_mode)) { > - rx_delay_stage_div = MT2712_RGMII_DLY_RXC_STAGE_DIV; > - tx_delay_stage_div = MT2712_RGMII_DLY_TXC_STAGE_DIV; > + rx_delay_stage_div = plat->variant->rx_rgmii_delay_stage_div; > + tx_delay_stage_div = plat->variant->tx_rgmii_delay_stage_div; > } else { > - rx_delay_stage_div = MT2712_RMII_DLY_RXC_STAGE_DIV; > - tx_delay_stage_div = MT2712_RMII_DLY_TXC_STAGE_DIV; > + rx_delay_stage_div = plat->variant->rx_rmii_delay_stage_div; > + tx_delay_stage_div = plat->variant->tx_rmii_delay_stage_div; Looking closer at this, what's RMII delay ? There's no delays in RMII, and it's a single clock not a RX and TX clock like RGMII, there's no RMII TXC/RXC. I think it's the same as on allwinner, the delay handling has been mixed-up between RMII and RGMII in the glue, you should be able to simplify this even more by ditching the RMII case. Maxime