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 CC3E9C282D1 for ; Sat, 1 Mar 2025 15:17:54 +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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=v/WEZu4XOSgNnI/wzCqASjzT/6f/xQH6R4zSfDlodRQ=; b=bLzTZJi4AItB9wQt4ZS/9SL9n3 CuyDhKkszdVWDz1WVx3gW9DZdyn9/ZOji3WNGmauCnl2FdzA+6KBzK6LxN0IHjgwiuIrygGUsuJyq mVL6XcEUHpoBeO0JFkOYd8YvCaAkxfn2cDljUCDu1F4MfeKKAnoonivIZWB1kCTGXFFnRqJ4xxycY 5kXFhS7Q3RqoL1CPIs4hhNsgOU29UxpOE4gB9blrO+Sj0QPC3ZmI+9U1066wSxHVjt/BM67D4+8Vl RrdPyhM+s9P28nqSswlwLMrYrG2qgiL6nkbHLePCqDxCECwmIubyc2pV3G08LrCXjkA/eZ3xq8q+n o8vq0qKg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1toOb0-0000000EXyk-42AY; Sat, 01 Mar 2025 15:17:42 +0000 Received: from layka.disroot.org ([178.21.23.139]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1toOZQ-0000000EXsb-0l7z; Sat, 01 Mar 2025 15:16:06 +0000 Received: from mail01.disroot.lan (localhost [127.0.0.1]) by disroot.org (Postfix) with ESMTP id 4033220523; Sat, 1 Mar 2025 16:15:59 +0100 (CET) X-Virus-Scanned: SPAM Filter at disroot.org Received: from layka.disroot.org ([127.0.0.1]) by localhost (disroot.org [127.0.0.1]) (amavis, port 10024) with ESMTP id 0iebN7Isx1Km; Sat, 1 Mar 2025 16:15:57 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=disroot.org; s=mail; t=1740842157; bh=OmrR4xD/XRUKk2rcMTrbTAl5fxjRwq+7cvLzauhy6QI=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=EBrD/O9RrVrUYRP+VtXW2Qnd/HbT6/xhYVGcT888/R1u+nZe8io1CWfIKSlqN+xVh uosX1SmQ+uG6WyBFrvoMmT17JPz6bItHX9gMyXNllu8xgSfizzV9/xYzM1LbNK//Et VcfncIB0U4fB6PdG2Wr0kCCH4CPj0lKLyBnVPppk3SVEeRppfh+BHYiHR7srIIZm6A ZuNv1C5GeFy9qJKkYwH4vp2FPQ8LHcyP+uq4wv0TAsSn/7aviqrzZh7AF4LU9X0ETQ SdYn8QlV+4DLyohYjHZH6LlYQEMSzJDnHQBh8QLhYMBEBNdU96iGwsLn5J5LXGnR6b mXqu6/2U4c1gw== Date: Sat, 1 Mar 2025 15:15:32 +0000 From: Yao Zi To: Jonas Karlman Cc: Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner , Michael Turquette , Stephen Boyd , Frank Wang , Shresth Prasad , Cristian Ciocaltea , Detlev Casanova , linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org Subject: Re: [PATCH 8/8] arm64: dts: rockchip: Enable SD-card interface on Radxa E20C Message-ID: References: <20250301104250.36295-1-ziyao@disroot.org> <20250301104835.36439-1-ziyao@disroot.org> <0aefd292-7980-434d-9c18-4ab9f6a0b40e@kwiboo.se> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0aefd292-7980-434d-9c18-4ab9f6a0b40e@kwiboo.se> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250301_071604_635855_18701243 X-CRM114-Status: GOOD ( 25.18 ) 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 On Sat, Mar 01, 2025 at 02:01:05PM +0100, Jonas Karlman wrote: > Hi, > > On 2025-03-01 11:48, Yao Zi wrote: > > SD-card is available on Radxa E20C board. > > > > Signed-off-by: Yao Zi > > --- > > arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts | 14 ++++++++++++++ > > 1 file changed, 14 insertions(+) > > > > diff --git a/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts b/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts > > index d2cdb63d4a9d..473065aa4228 100644 > > --- a/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts > > +++ b/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts > > @@ -12,6 +12,10 @@ / { > > model = "Radxa E20C"; > > compatible = "radxa,e20c", "rockchip,rk3528"; > > > > + aliases { > > + mmc0 = &sdmmc; > > Suggest using mmc1 for sd-card because the e20c typically have onboard > emmc, compared to removable sd-card. My board doesn't have an eMMC: it's optional as well, but all variants of Radxa E20C come with an SD-card interface. The vendor devicetree sets sdmmc as mmc0 as well[1]. I won't insist on it and am willing to take the change if you still consider mmc0 is better. > > + }; > > + > > chosen { > > stdout-path = "serial0:1500000n8"; > > }; > > @@ -20,3 +24,13 @@ chosen { > > &uart0 { > > status = "okay"; > > }; > > + > > +&sdmmc { > > + bus-width = <4>; > > + cap-mmc-highspeed; > > + cap-sd-highspeed; > > + disable-wp; > > + rockchip,default-sample-phase = <90>; > > + sd-uhs-sdr104; > > Are you sure uhs-sdr104 works as is should? In fact yes, tuning succeeds at 148.5MHz and results in 66MB/s reading speed. > Vendor kernel use a different "v2" tuning This isn't a problem. IMHO V2 tuning is more like a quick path, which tries inheritting the phase from firmware and then re-tunes roughly. Fine tunning is still a fallback here in case of failure, see the commit message in the downstream kernel[2]. And testing proves it's okay for RK3528 to issue fine-tuning always. > and this is also missing the vccio_sd vqmmc-supply to switch between > 3v3 and 1v8. But this is a problem, thanks for catching it! Somehow my card managed to run at 148.5MHz with 3v3 voltage level, but it's definitely a compatiblity issue. I'm surprised that the driver doesn't complain when switching to SDR modes without a regulator configured. > You could add following regulator for sdmmc: > > vccio_sd: regulator-vccio-sd { > compatible = "regulator-gpio"; > gpios = <&gpio4 RK_PB6 GPIO_ACTIVE_HIGH>; > pinctrl-names = "default"; > pinctrl-0 = <&sdmmc_vol_ctrl_h>; > regulator-name = "vccio_sd"; > regulator-min-microvolt = <1800000>; > regulator-max-microvolt = <3300000>; > states = <1800000 0x0>, <3300000 0x1>; > }; > > and following pinctrl: > > sdmmc { > sdmmc_vol_ctrl_h: sdmmc-vol-ctrl-h { > rockchip,pins = <4 RK_PB6 RK_FUNC_GPIO &pcfg_pull_none>; > }; > }; > > add then the power supplies to the sdmmc node: > > vmmc-supply = <&vcc_3v3>; > vqmmc-supply = <&vccio_sd>; > > That matches the schematics for e20c, and works when testing non-uhs modes. Thanks for the hints. Will rebase on your pinctrl series and get regulators and pinctrl settings applied in the next version. > Regards, > Jonas > > > + status = "okay"; > > +}; > Cheers, Yao Zi [1]: https://github.com/radxa/kernel/blob/2b0c8de7dc4c68947cda206dcc2e457e9677e426/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts#L22-L26 [2]: https://github.com/rockchip-linux/kernel/commit/795e052cc8610aa59a64b104f975cc4a45493d5d