From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-m19731113.qiye.163.com (mail-m19731113.qiye.163.com [220.197.31.113]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CD53F42AA9; Sun, 11 Oct 2026 04:12:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.113 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791691938; cv=none; b=SusCtKv17FnuD3TMmRUEbPsUiOkE/d5U3g98WfOb/fNUXDZMAOzr0j0MnTEmeGDhkt7nTRjuA9K6ZPbQeCNazUTzPXhwWlYjSlBznVbi+FQrBn3F/6Ng/qsbIpdkyjdFSTQouvD1BaSVdA51kwffuGbZlcDFjQMpTrp7VAqQ6ps= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791691938; c=relaxed/simple; bh=BIhnSRkxnjByp6jgM7SyUOrR35QovMQeGgQXrQdcA+s=; h=Message-ID:Date:MIME-Version:Cc:Subject:To:References:From: In-Reply-To:Content-Type; b=D0drNSFgTPvTGC55DTngpphZ8xDXKOHOotow7LweSa8R3l5F6iNmKqSfO5kSWqww0sjReXqYQ3/aVdQ5EIg16DUqBZpI/D+FWeaRq+cTMpiFITdoV5H5ijIxXZrI2jwAUUBbm6827uQkoPEzvHIIq0XOGmVfRe7673oY4RkTPmY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=rock-chips.com; spf=pass smtp.mailfrom=rock-chips.com; dkim=pass (1024-bit key) header.d=rock-chips.com header.i=@rock-chips.com header.b=DunVzkjc; arc=none smtp.client-ip=220.197.31.113 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=rock-chips.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rock-chips.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=rock-chips.com header.i=@rock-chips.com header.b="DunVzkjc" Received: from [172.16.12.48] (unknown [61.154.14.86]) by smtp.qiye.163.com (Hmail) with ESMTP id 5097b761b; Sun, 11 Oct 2026 09:49:39 +0800 (GMT+08:00) Message-ID: <8bf7a001-8b65-4129-8b41-a2986bb78643@rock-chips.com> Date: Sun, 11 Oct 2026 09:49:39 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Cc: shawn.lin@rock-chips.com, Rob Herring , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] arm64: dts: rockchip: Enable HS400 enhanced strobe on Kobol Helios64 eMMC To: iav@iav.lv, Heiko Stuebner References: <20261011-b4-helios64-emmc-hs400-v1-1-36951d319229@iav.lv> From: Shawn Lin In-Reply-To: <20261011-b4-helios64-emmc-hs400-v1-1-36951d319229@iav.lv> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-HM-Tid: 0aa128a6c25703a4kunm693df481f314c X-HM-MType: 1 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFITzdXWRgWCB1ZQUpXWS1ZQUlXWQ8JGhUIEh9ZQVlCH0JPVkoZQ0lJTE0YTh5PSVYVFA kWGhdVEwETFhoSFyQUDg9ZV1kYEgtZQVlNSlVKTk9VSk9VQ01ZV1kWGg8SFR0UWUFZT0tIVUpLSU 9PT0hVSktLVUpCS0tZBg++ DKIM-Signature: a=rsa-sha256; b=DunVzkjct1HK2gDhGF78vAGWOTvXmbTFQCh7jdOS9zME+63fNyXovf246jrlLtHymCuh7IhBhE6hXj7e22ZxFXxNQRR65irjZ3/7IU3Y41SWAfKeJWwf5C0gppNIqzSez7L2SkUBt7yRgAX2XFZGGv4ZhPowE9pEnx+s9w7iurY=; c=relaxed/relaxed; s=default; d=rock-chips.com; v=1; bh=1i8L10GRky4bG22WnSj3l/2lPWD2x42vP1059qe6SY4=; h=date:mime-version:subject:message-id:from; 在 2026/10/11 星期日 5:52, Igor Velkov via B4 Relay 写道: > From: Igor Velkov > > The eMMC of Helios64 runs in HS200. Run it in HS400 enhanced strobe at > 150 MHz, as on Gru. The strobe line goes straight from the SoC to the > DS pin of the eMMC with no pull-down on the board, so enable the one > in the eMMC PHY. > Reviewed-by: Shawn Lin > Assisted-by: LLM > Signed-off-by: Igor Velkov > --- > Schematic, sheet 14: > https://wiki.kobol.io/helios64/files/schematics/Helios64_Schematics_Rev1.2.pdf > > Tested on mainline with three 2 GiB write and read-back passes, no > errors. Raw reads go from 180 MB/s in HS200 to 247 MB/s. Without the > pull-down, writes dropped to about 1 MB/s with repeated > "mmc1: running CQE recovery". > --- > arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts b/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts > index 63ad79b4c8ac..f78482c4c285 100644 > --- a/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts > +++ b/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts > @@ -320,6 +320,7 @@ &cpu_l3 { > }; > > &emmc_phy { > + rockchip,enable-strobe-pulldown; > status = "okay"; > }; > > @@ -586,8 +587,11 @@ &saradc { > }; > > &sdhci { > + assigned-clock-rates = <150000000>; > bus-width = <8>; > mmc-hs200-1_8v; > + mmc-hs400-1_8v; > + mmc-hs400-enhanced-strobe; > non-removable; > vqmmc-supply = <&vcc1v8_sys_s0>; > status = "okay"; > > --- > base-commit: d2abcbb905b0e4b2e06b257fa1e5bcf4faa6dbda > change-id: 20261011-b4-helios64-emmc-hs400-9c784f35d8dd > > Best regards,