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 DD2E3C369CB for ; Wed, 23 Apr 2025 22:30:15 +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=Sci9yMspbMD4lKOR2y75ZVpSS5ydsma73LWBeFpHdb8=; b=bqr9EXDfUk0jTldFcLdUCMjwxt Kh7Or7uuWv/FwQo6799inTP7+3JDmCBXOnqNTNVx56QRQj4Wl2eB7HFxFJrOecHB6L4glCGLQw6Wq 6aM7FBfFpet/riUmyAP39cYA2d0o2DevDqmLac+gFzVN04h3b7r3ZnV0yu8hr3tDN0AXqdZgLbSo4 MZ4Aw9oQi9dzfxJPM8oekafB8+w+pI9i0xwv+fjXSBoUJvC8Gcaj/pCe2klRUUrSiT+9UjTo4MSOA jQFB0pBZHByeFExkjFB+lDLjjepymuoAGokMjPpo20BCfE9BmnjPomZ67UCH1Eeg7Kf8OcZSRx91x mUNB+n2Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1u7ibV-0000000CCbe-4AbJ; Wed, 23 Apr 2025 22:30:05 +0000 Received: from fllvem-ot04.ext.ti.com ([198.47.19.246]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1u7iZW-0000000CCU3-1Paj for linux-arm-kernel@lists.infradead.org; Wed, 23 Apr 2025 22:28:04 +0000 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllvem-ot04.ext.ti.com (8.15.2/8.15.2) with ESMTPS id 53NMRlwx2305813 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 23 Apr 2025 17:27:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1745447267; bh=Sci9yMspbMD4lKOR2y75ZVpSS5ydsma73LWBeFpHdb8=; h=Date:Subject:To:CC:References:From:In-Reply-To; b=uZNf5ndMmPB6FHx10Yr/xKpXy5Poef6u/GByG4vBxSwGt2Af1C3bjIepfPlx2nJQx RXj9k7BiOchp7/tqS6Fg2X3NnZLWNBKkBgWHzyyEaEirP1biFi+iES5AS4NEy8UIX/ 2AlKBg33cFw/DST9m+VUBqeBFnTjp9zUmNnERaIk= Received: from DFLE109.ent.ti.com (dfle109.ent.ti.com [10.64.6.30]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 53NMRlHh011323 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 23 Apr 2025 17:27:47 -0500 Received: from DFLE103.ent.ti.com (10.64.6.24) by DFLE109.ent.ti.com (10.64.6.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Wed, 23 Apr 2025 17:27:47 -0500 Received: from lelvsmtp5.itg.ti.com (10.180.75.250) by DFLE103.ent.ti.com (10.64.6.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Wed, 23 Apr 2025 17:27:47 -0500 Received: from [128.247.81.105] (judy-hp.dhcp.ti.com [128.247.81.105]) by lelvsmtp5.itg.ti.com (8.15.2/8.15.2) with ESMTP id 53NMRlFx013207; Wed, 23 Apr 2025 17:27:47 -0500 Message-ID: <8678d284-db12-451a-b789-2b75f9932f9f@ti.com> Date: Wed, 23 Apr 2025 17:27:47 -0500 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RESEND v3 0/3] Add ti,suppress-v1p8-ena To: Nishanth Menon , Josua Mayer , "Sverdlin, Alexander" CC: Ulf Hansson , Adrian Hunter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Vignesh Raghavendra , Tero Kristo , , , , , Francesco Dolcini , Hiago De Franco , Moteen Shah , References: <20250422220512.297396-1-jm@ti.com> <20250423180809.l3l6sfbwquaaazar@shrank> Content-Language: en-US From: Judith Mendez In-Reply-To: <20250423180809.l3l6sfbwquaaazar@shrank> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250423_152802_649862_5ADE161E X-CRM114-Status: GOOD ( 22.00 ) 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 Nishanth, On 4/23/25 1:08 PM, Nishanth Menon wrote: > On 17:05-20250422, Judith Mendez wrote: >> Resend patch series to fix cc list >> >> There are MMC boot failures seen with V1P8_SIGNAL_ENA on Kingston eMMC >> and Microcenter/Patriot SD cards on Sitara K3 boards due to the HS200 >> initialization sequence involving V1P8_SIGNAL_ENA. Since V1P8_SIGNAL_ENA >> is optional for eMMC, do not set V1P8_SIGNAL_ENA by default for eMMC. >> For SD cards we shall parse DT for ti,suppress-v1p8-ena property to >> determine whether to suppress V1P8_SIGNAL_ENA. Add new ti,suppress-v1p8-ena >> to am62x, am62ax, and am62px SoC dtsi files since there is no internal LDO >> tied to sdhci1 interface so V1P8_SIGNAL_ENA only affects timing. >> >> This fix was previously merged in the kernel, but was reverted due >> to the "heuristics for enabling the quirk"[0]. This issue is adressed >> in this patch series by adding optional ti,suppress-v1p8-ena DT property >> which determines whether to apply the quirk for SD. > [...] >> >> [0] https://lore.kernel.org/linux-mmc/20250127-am654-mmc-regression-v2-1-9bb39fb12810@solid-run.com/ > > Why cant we use compatible to enable the quirk instead of blindly > enabling for all IPs including ones that have onchip LDOs? That was the > reason it failed in the first place for am64x. We made an assumption that did not work out. > > This is very much like a quirk that seems to go hand-in-hand with the > compatible for am62-sdhci ? > > Is it worth exploring that option in the driver thread? from where I > stand, this sounds very much like an issue that AM62x IP has, and should > be handled by the driver instead of punting to dts to select where to > use and not to use the quirk. > Sure, I can test this out and respin the series. It does seem like a more clean solution, thanks for reviewing. ~ Judith