From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ritesh Harjani Subject: Re: Regression after "do not use CMD13 to get status after speed mode switch" Date: Tue, 18 Oct 2016 09:36:27 +0530 Message-ID: <5f261465-9cc6-4403-5e1b-23df1b347dcb@codeaurora.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from smtp.codeaurora.org ([198.145.29.96]:58865 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750703AbcJREGf (ORCPT ); Tue, 18 Oct 2016 00:06:35 -0400 In-Reply-To: Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Linus Walleij , "linux-mmc@vger.kernel.org" , Ulf Hansson , Chaotian Jing Cc: "linux-arm-msm@vger.kernel.org" , Bjorn Andersson , Stephen Boyd , Andy Gross , Georgi Djakov Hi Linus, Recently for the same patch below was submitted for Qcom sdhci-msm driver. https://patchwork.kernel.org/patch/9237679/ You mentioned yours is mmci driver. See if it provides any hints. Regards Ritesh On 10/17/2016 8:02 PM, Linus Walleij wrote: > Hi Chaotian, > > my Dragonboard 8060 has a regression on detecting the eMMC after > bisecting it down to this patch (which is sadly already in v4.8): > > commit 08573eaf1a70104f83fdbee9b84e5be03480e9ed > Author: Chaotian Jing > Date: Thu May 19 16:47:41 2016 +0800 > mmc: mmc: do not use CMD13 to get status after speed mode switch > > Before this patch the eMMC is detected and all partitions enumerated > immediately, but after the patch it doesn't come up at all, except > sometimes, when it appears minutes (!) after boot, all of a sudden. > > Do you have any ideas on what can be wrong? > > This is the Qualcomm MMCI variant whid does *not* support > busydetection in hardware. > > I will continue looking at it but would be happy for any hints on how to > solve it, currently I cannot mount root off the eMMC because of this. > > Yours, > Linus Walleij > -- > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project