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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 6A052C64E7A for ; Mon, 23 Nov 2020 13:02:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 139AB2071E for ; Mon, 23 Nov 2020 13:02:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="KI2aDPHc" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388300AbgKWNCu (ORCPT ); Mon, 23 Nov 2020 08:02:50 -0500 Received: from mail.kernel.org ([198.145.29.99]:36514 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732795AbgKWMwi (ORCPT ); Mon, 23 Nov 2020 07:52:38 -0500 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B3DC3204EF; Mon, 23 Nov 2020 12:52:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1606135943; bh=Ldy3hX7P9OkUp6SHI1zevMtPYGY+gkgEJAbM+IwMhAs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KI2aDPHcQEpVRcUWNt6gUIUE2klEz55KDoxPArMG4GfXyrv2vDIh6vqW0lb/iyU19 yd+tOwyYz//2zOkO25209Qvlu+clJPyxwCDjJFqmWDyLtFoO2Md8I/Fe/IV5ClehLe R1LrpZmHP3o+4nPqiPGqy60hlqnWeh1eOzd5q6CQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sai Krishna Potthuri , Manish Narani , Michal Simek , Ulf Hansson Subject: [PATCH 5.9 243/252] mmc: sdhci-of-arasan: Issue DLL reset explicitly Date: Mon, 23 Nov 2020 13:23:13 +0100 Message-Id: <20201123121847.308585376@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201123121835.580259631@linuxfoundation.org> References: <20201123121835.580259631@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Manish Narani commit d06d60d52ec0b0eef702dd3e7b4699f0b589ad0f upstream. In the current implementation DLL reset will be issued for each ITAP and OTAP setting inside ATF, this is creating issues in some scenarios and this sequence is not inline with the TRM. To fix the issue, DLL reset should be removed from the ATF and host driver will request it explicitly. This patch update host driver to explicitly request for DLL reset before ITAP (assert DLL) and after OTAP (release DLL) settings. Fixes: a5c8b2ae2e51 ("mmc: sdhci-of-arasan: Add support for ZynqMP Platform Tap Delays Setup") Signed-off-by: Sai Krishna Potthuri Signed-off-by: Manish Narani Acked-by: Michal Simek Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/1605515565-117562-4-git-send-email-manish.narani@xilinx.com Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/host/sdhci-of-arasan.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/mmc/host/sdhci-of-arasan.c +++ b/drivers/mmc/host/sdhci-of-arasan.c @@ -635,6 +635,9 @@ static int sdhci_zynqmp_sdcardclk_set_ph if (ret) pr_err("Error setting Output Tap Delay\n"); + /* Release DLL Reset */ + zynqmp_pm_sd_dll_reset(node_id, PM_DLL_RESET_RELEASE); + return ret; } @@ -669,6 +672,9 @@ static int sdhci_zynqmp_sampleclk_set_ph if (host->version < SDHCI_SPEC_300) return 0; + /* Assert DLL Reset */ + zynqmp_pm_sd_dll_reset(node_id, PM_DLL_RESET_ASSERT); + switch (host->timing) { case MMC_TIMING_MMC_HS: case MMC_TIMING_SD_HS: