From patchwork Mon Jun 8 08:06:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yue Hu X-Patchwork-Id: 11592717 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0525A60D for ; Mon, 8 Jun 2020 08:06:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CED4920774 for ; Mon, 8 Jun 2020 08:06:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="o4uThnaa" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729093AbgFHIGh (ORCPT ); Mon, 8 Jun 2020 04:06:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39416 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728956AbgFHIGe (ORCPT ); Mon, 8 Jun 2020 04:06:34 -0400 Received: from mail-pj1-x1043.google.com (mail-pj1-x1043.google.com [IPv6:2607:f8b0:4864:20::1043]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 23C7CC08C5C3 for ; Mon, 8 Jun 2020 01:06:34 -0700 (PDT) Received: by mail-pj1-x1043.google.com with SMTP id b7so4733593pju.0 for ; Mon, 08 Jun 2020 01:06:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=xdvIYaSYRN0iBQvKoB6lnmWB7QLF2DNRpHW6cM2KMb8=; b=o4uThnaauCkVIXf/5gOFqTM0HykIVQUOz3BmWfBQ+Dzahm5jG9Olr7H5YECRRPh1lQ V2UjGSBSx15/e7/drIgx/yXv0SxWlNI2uEpMQG77Pbz/Cw6dY0N6kMvP0T+in8kXE4Ke qw3ltjgOYCwg3ibkd/+ASvBIwu6CBtoUxD2sTAFK7dBAtRD9BO3vnC5rO5guSwBnqoEE ZyQqKMOAhsXG8W+J3sYDfMzYqACYFCOZMsU+jV510D9tXc0uMWh5bDziTic8MeTGcsjd fRQcwkbl14Aq8RHKY8ogMxSWJSOmwqFCBFItmxNEB+esFoQiKPAmqSX3efzx03XlqfGw PRqg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=xdvIYaSYRN0iBQvKoB6lnmWB7QLF2DNRpHW6cM2KMb8=; b=BLj9VWNMH5gyeDblkKS+xEXFdtzpt6kp8w9i6MAaaYAyCKAxsJkB3w409INeyN/REt hGlYzOxZrZlMeSn/RUrUzv1qEXUfxtN8QQubgvrlR2Q0PNg4+GlRMvFyRL882MxrQDjq xQCMUvJLzaqgAufKeBBbrIDH42CKBT1OEcwY/dFbXnQkE6SNIyfQtFe6q5ETdZ6f2nN7 6hSVdx58J2jqITecc45IvRZ9+3NnrWDCoeFjqzcMpwaGhFxib6wGXQUdazl34h0Zl178 szu/FK8rfaR94tQ9rKjvEDXuEWMrYyBbIG7lher3t6LoyxZ97RnFyX48FoRdxu7W804v PTGQ== X-Gm-Message-State: AOAM530ZsOcwlmEk94FElV+RV/s9zbxFsqQAyH9CyIH2iBwCk0LS1x+a Ln4tO6QBHXIcsa9uC//7v8Q= X-Google-Smtp-Source: ABdhPJzUEmYTv10Y2SGhiGweRlxCajQdBupLRyX3S4HqvZvq2spJEatPZg5se1kLGcH7wWms9XfBrg== X-Received: by 2002:a17:90b:3612:: with SMTP id ml18mr13726429pjb.153.1591603593715; Mon, 08 Jun 2020 01:06:33 -0700 (PDT) Received: from huyue2.ccdomain.com ([103.29.143.67]) by smtp.gmail.com with ESMTPSA id b4sm6418168pfg.75.2020.06.08.01.06.30 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 08 Jun 2020 01:06:32 -0700 (PDT) From: Yue Hu To: ulf.hansson@linaro.org, dianders@chromium.org, mka@chromium.org Cc: linux-mmc@vger.kernel.org, huyue2@yulong.com Subject: [PATCH] mmc: sdio: Enable SDIO 4-bit bus if not support SD_SCR_BUS_WIDTH_4 for SD combo card Date: Mon, 8 Jun 2020 16:06:19 +0800 Message-Id: <20200608080619.9388-1-zbestahu@gmail.com> X-Mailer: git-send-email 2.17.1.windows.2 Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org From: Yue Hu If the card type is SD combo and the memory part does not support wider bus(SD_SCR_BUS_WIDTH_4), nothing will be done except return 0. However, we should check whether SDIO part support wider bus or not just like the behavior about enabling high speed mode in sdio_enable_hs(). In addition, there's a duplicated check to MMC_CAP_4_BIT_DATA since sdio_enable_wide() will include that check. And we can also save one call site to sdio_enable_wide() after this change. Signed-off-by: Yue Hu --- drivers/mmc/core/sdio.c | 26 ++++++++++++-------------- 1 file changed, 12 insertions(+), 14 deletions(-) diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index ebb387a..cacc863 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -290,25 +290,23 @@ static int sdio_enable_4bit_bus(struct mmc_card *card) { int err; + err = sdio_enable_wide(card); + if (err <= 0) + return err; if (card->type == MMC_TYPE_SDIO) - err = sdio_enable_wide(card); - else if ((card->host->caps & MMC_CAP_4_BIT_DATA) && - (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { + goto out; + + if (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4) { err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); - if (err) + if (err) { + sdio_disable_wide(card); return err; - err = sdio_enable_wide(card); - if (err <= 0) - mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1); - } else - return 0; - - if (err > 0) { - mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); - err = 0; + } } +out: + mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); - return err; + return 0; }