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 X-Spam-Level: X-Spam-Status: No, score=-2.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2457BC33C9E for ; Wed, 8 Jan 2020 11:28:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E8B632070E for ; Wed, 8 Jan 2020 11:28:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="E/y1Xc4d" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726276AbgAHL2v (ORCPT ); Wed, 8 Jan 2020 06:28:51 -0500 Received: from fllv0015.ext.ti.com ([198.47.19.141]:60162 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726252AbgAHL2v (ORCPT ); Wed, 8 Jan 2020 06:28:51 -0500 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 008BSePi107657; Wed, 8 Jan 2020 05:28:40 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1578482920; bh=4VlFsH0x4nyhfaCnO0v3sjcb4oaBGAFeq3JnlX2SVYM=; h=Subject:To:CC:References:From:Date:In-Reply-To; b=E/y1Xc4dBJ6FaL/brdE0+rP3R/FG7dVzVkw9u2sHH2sBnGAYsAlXGlnrVmJI+X01E Isvfmo5V49gbVkhi0vzOZcHPsKOPSdB8bztiOqONtXiPI6bLwaHW7IEyx2lPJDeFqU Smf7yIDQUoEQHa4jTdJJfW+auCjGC6TpMAHYv4uQ= Received: from DLEE100.ent.ti.com (dlee100.ent.ti.com [157.170.170.30]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 008BSebV049301 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 8 Jan 2020 05:28:40 -0600 Received: from DLEE107.ent.ti.com (157.170.170.37) by DLEE100.ent.ti.com (157.170.170.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Wed, 8 Jan 2020 05:28:39 -0600 Received: from fllv0039.itg.ti.com (10.64.41.19) by DLEE107.ent.ti.com (157.170.170.37) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3 via Frontend Transport; Wed, 8 Jan 2020 05:28:39 -0600 Received: from [172.24.190.4] (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 008BSbfv103074; Wed, 8 Jan 2020 05:28:38 -0600 Subject: Re: [PATCH 0/3] Fix issues with command queuing in arasan controllers To: , CC: , , References: <20191230092343.30692-1-faiz_abbas@ti.com> From: Faiz Abbas Message-ID: <837996b2-c69f-1446-fda4-5577e28ba8e1@ti.com> Date: Wed, 8 Jan 2020 17:00:11 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: <20191230092343.30692-1-faiz_abbas@ti.com> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org Hi, On 30/12/19 2:53 pm, Faiz Abbas wrote: > In some Arasan SDHCI controllers, after tuning, the tuning pattern data > is leftover in the sdhci buffer. This leads to issues with future data > commands, especially when command queuing is enabled. The following > patches help fix this issue by resetting data lines after tuning is > finished. The first two patches have been tested with TI's am65x and > j721e SoCs using the sdhci_am654 driver. > > I have a strong suspicion that this is the same issue with > the sdhci-of-arasan driver where they are forced to dump data from the > buffer before enabling command queuing. I need help from someone with a > compatible platform to test this. > I had some discussions with our hardware team and they say we should be asserting both SRC and SRD reset after tuning to start from a clean state. Will update the patches to do that in v2. Thanks, Faiz