From patchwork Fri Feb 15 05:59:34 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chaotian Jing X-Patchwork-Id: 10814205 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 62325139A for ; Fri, 15 Feb 2019 06:00:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 501B62EC4B for ; Fri, 15 Feb 2019 06:00:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 436862EC56; Fri, 15 Feb 2019 06:00:25 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id E8CCA2EC4B for ; Fri, 15 Feb 2019 06:00:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ylmHTKDb83pMaaxqB8hJzUCuW3vn3HoOWmqAtELoj5M=; b=rP/gQrWhtA31fT oxiaXUFmbLr4Cg+hcmk+hYWdqTtKnXA6LYMAq6oEFXsRsh8boO+XI7eOrz+XHsRdpnwgPx0e3L9Aa Fio3CmPQCfIlNQYxJAwgxtzH58l6A2j9KV1iE8TgpkAN9/F4AykgOsSIXWi7OcLa1qCqABFEf1PAc dOSISRQ69YGEfd6i/vf8KB8zJDXkDAobxjyOZdOZpg5vm02mGlAvzmhc4CWp83VWKAJlvppWOgeW5 jwF0yWqL3H4MdKgt47gcs1d+nyRL53eu8p5spZ+CrKt3+tkw5kBvwOwn2glVVA7saz9b5kRXbNaS2 59PZP8Hr0Yq3YxQKaMVg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1guWXp-0006Fl-8B; Fri, 15 Feb 2019 06:00:17 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1guWXU-0004kS-L5; Fri, 15 Feb 2019 05:59:57 +0000 X-UUID: a5d7a79a264640cabee76ed92c788773-20190214 X-UUID: a5d7a79a264640cabee76ed92c788773-20190214 Received: from mtkcas68.mediatek.inc [(172.29.94.19)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 567449229; Thu, 14 Feb 2019 21:59:43 -0800 Received: from mtkmbs03n1.mediatek.inc (172.21.101.181) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 14 Feb 2019 21:59:42 -0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs03n1.mediatek.inc (172.21.101.181) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Fri, 15 Feb 2019 13:59:40 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Fri, 15 Feb 2019 13:59:40 +0800 From: Chaotian Jing To: Ulf Hansson Subject: [PATCH v2 1/2] mmc: core: do not retry CMD6 in __mmc_switch() Date: Fri, 15 Feb 2019 13:59:34 +0800 Message-ID: <1550210375-32270-2-git-send-email-chaotian.jing@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1550210375-32270-1-git-send-email-chaotian.jing@mediatek.com> References: <1550210375-32270-1-git-send-email-chaotian.jing@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190214_215956_706537_F3CB05A9 X-CRM114-Status: GOOD ( 10.95 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: srv_heupstream@mediatek.com, Shawn Lin , linux-mmc@vger.kernel.org, Adrian Hunter , linux-kernel@vger.kernel.org, Avri Altman , linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Hongjie Fang , Matthias Brugger , Simon Horman , Kyle Roeschley , Chaotian Jing Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP the response type of CMD6 is R1B, when the first CMD6 gets response CRC error, do retry may get timeout error due to card may still in busy state, which cause this retry make no sense. Signed-off-by: Chaotian Jing --- drivers/mmc/core/mmc_ops.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index 9054329..c5208fb 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -562,7 +562,7 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value, if (index == EXT_CSD_SANITIZE_START) cmd.sanitize_busy = true; - err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); + err = mmc_wait_for_cmd(host, &cmd, 0); if (err) goto out; From patchwork Fri Feb 15 05:59:35 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chaotian Jing X-Patchwork-Id: 10814209 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AD9DC13B5 for ; Fri, 15 Feb 2019 06:00:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 985E92EC4B for ; 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bh=uYj/lj/brsctzqhSneaqZ/tuEfQCtdQw50iwtG7JlXA=; b=jBBJPaXmfJzT8y 7LyZASmNYZnJX7YlgCOX1CwFhz2EkbEZ4syhvA15kqw1yAM8gN9KXyv2B6PcXp1husfq5tkMrlHwo E3+BkcvBFl9pgmd+XyyoIf8PXtWw3Yo/gy5Kkoy4aQD7J3Us8i5u6T8821fXqGyEaCBJwnEueSIRe fWu0XXYxvXfX/p3L2/dYrCG6TTxIt+XHpho5pW2NN06EBHQcF28d2+1IPwt8Mns/PVtNwwsJci+ED PNGYZ0VEQoHbGHbYEepdsv2yAD+Kv99cBblsaTuYQUbApCCUJLxHDrov3c/zJZrRoA9cWIWZKZZIT wEhdtrbuNNE7GMoaqepg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1guWXz-0006S6-If; Fri, 15 Feb 2019 06:00:27 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1guWXY-0004lf-Kd; Fri, 15 Feb 2019 06:00:06 +0000 X-UUID: 9d3c4c2fd7d647bbab02853428eb02bc-20190214 X-UUID: 9d3c4c2fd7d647bbab02853428eb02bc-20190214 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 2119198285; Thu, 14 Feb 2019 21:59:46 -0800 Received: from mtkmbs03n1.mediatek.inc (172.21.101.181) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 14 Feb 2019 21:59:44 -0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs03n1.mediatek.inc (172.21.101.181) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Fri, 15 Feb 2019 13:59:43 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Fri, 15 Feb 2019 13:59:42 +0800 From: Chaotian Jing To: Ulf Hansson Subject: [PATCH v2 2/2] mmc: mmc: Fix HS setting in mmc_hs400_to_hs200() Date: Fri, 15 Feb 2019 13:59:35 +0800 Message-ID: <1550210375-32270-3-git-send-email-chaotian.jing@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1550210375-32270-1-git-send-email-chaotian.jing@mediatek.com> References: <1550210375-32270-1-git-send-email-chaotian.jing@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190214_220000_830615_192826D2 X-CRM114-Status: GOOD ( 13.41 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: srv_heupstream@mediatek.com, Shawn Lin , linux-mmc@vger.kernel.org, Adrian Hunter , linux-kernel@vger.kernel.org, Avri Altman , linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Hongjie Fang , Matthias Brugger , Simon Horman , Kyle Roeschley , Chaotian Jing Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP mmc_hs400_to_hs200() begins with the card and host in HS400 mode. before send CMD6 to switch card's timing to HS mode, it reduce clock frequency to 50Mhz firstly, the original intention of reduce clock is to make "more stable" when doing HS switch. however,reduce clock frequency to 50Mhz but without host timming change may cause CMD6 response CRC error. because host is still running at hs400 mode, and it's hard to find a suitable setting for all eMMC cards when clock frequency reduced to 50Mhz but card & host still in hs400 mode. so that We consider that CMD6 response CRC error is not a fatal error, if host gets CMD6 response CRC error, it means that card has already received this command. Signed-off-by: Chaotian Jing Fixes: ef3d232245ab ("mmc: mmc: Relax checking for switch errors after HS200 switch") --- drivers/mmc/core/mmc.c | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 09c688f..03d1c17 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -1248,8 +1248,25 @@ int mmc_hs400_to_hs200(struct mmc_card *card) err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, val, card->ext_csd.generic_cmd6_time, 0, true, false, true); - if (err) - goto out_err; + /* + * as we are on the way to do re-tune, so if the CMD6 got response CRC + * error, do not treat it as error. + */ + if (err) { + if (err == -EILSEQ) { + /* + * card will busy after sending out response and host + * driver may not wait busy de-assert when get + * response CRC error. so just wait enough time to + * ensure card leave busy state. + */ + mmc_delay(card->ext_csd.generic_cmd6_time); + pr_debug("%s: %s switch to HS got CRC error\n", + mmc_hostname(host), __func__); + } else { + goto out_err; + } + } mmc_set_timing(host, MMC_TIMING_MMC_DDR52);