From patchwork Fri Nov 6 13:48:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adrian Hunter X-Patchwork-Id: 11887157 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 D70901130 for ; Fri, 6 Nov 2020 13:48:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B577F2067B for ; Fri, 6 Nov 2020 13:48:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727214AbgKFNsX (ORCPT ); Fri, 6 Nov 2020 08:48:23 -0500 Received: from mga17.intel.com ([192.55.52.151]:1057 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727093AbgKFNsX (ORCPT ); Fri, 6 Nov 2020 08:48:23 -0500 IronPort-SDR: D323Q490w/AG4PBOjvcLmFwowteghFT9UrzXu8SuTFGeCREPAbX5zdKCzUT6xqP/P+NiTR6WML vlv7MYK3lLxQ== X-IronPort-AV: E=McAfee;i="6000,8403,9796"; a="149396949" X-IronPort-AV: E=Sophos;i="5.77,456,1596524400"; d="scan'208";a="149396949" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Nov 2020 05:48:22 -0800 IronPort-SDR: Gkdp8fHyVQomYQIB+QNKfRsPJVYFJlgn1PVm+U+6T3XpNriJs03Yz/6+ygMQ2RzqAtO0igkFIV OSUcJzp/umKQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,456,1596524400"; d="scan'208";a="358800847" Received: from ahunter-desktop.fi.intel.com ([10.237.72.94]) by fmsmga002.fm.intel.com with ESMTP; 06 Nov 2020 05:48:21 -0800 From: Adrian Hunter To: Ulf Hansson Cc: linux-mmc Subject: [PATCH] mmc: sdhci-pci: Prefer SDR25 timing for High Speed mode for BYT-based Intel controllers Date: Fri, 6 Nov 2020 15:48:07 +0200 Message-Id: <20201106134807.9076-1-adrian.hunter@intel.com> X-Mailer: git-send-email 2.17.1 Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org A UHS setting of SDR25 can give better results for High Speed mode. Signed-off-by: Adrian Hunter Cc: stable@vger.kernel.org # v5.4+ --- drivers/mmc/host/sdhci-pci-core.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c index 23da7f7fe093..9552708846ca 100644 --- a/drivers/mmc/host/sdhci-pci-core.c +++ b/drivers/mmc/host/sdhci-pci-core.c @@ -665,6 +665,15 @@ static void sdhci_intel_set_power(struct sdhci_host *host, unsigned char mode, } } +static void sdhci_intel_set_uhs_signaling(struct sdhci_host *host, + unsigned int timing) +{ + /* Set UHS timing to SDR25 for High Speed mode */ + if (timing == MMC_TIMING_MMC_HS || timing == MMC_TIMING_SD_HS) + timing = MMC_TIMING_UHS_SDR25; + sdhci_set_uhs_signaling(host, timing); +} + #define INTEL_HS400_ES_REG 0x78 #define INTEL_HS400_ES_BIT BIT(0) @@ -721,7 +730,7 @@ static const struct sdhci_ops sdhci_intel_byt_ops = { .enable_dma = sdhci_pci_enable_dma, .set_bus_width = sdhci_set_bus_width, .reset = sdhci_reset, - .set_uhs_signaling = sdhci_set_uhs_signaling, + .set_uhs_signaling = sdhci_intel_set_uhs_signaling, .hw_reset = sdhci_pci_hw_reset, }; @@ -731,7 +740,7 @@ static const struct sdhci_ops sdhci_intel_glk_ops = { .enable_dma = sdhci_pci_enable_dma, .set_bus_width = sdhci_set_bus_width, .reset = sdhci_cqhci_reset, - .set_uhs_signaling = sdhci_set_uhs_signaling, + .set_uhs_signaling = sdhci_intel_set_uhs_signaling, .hw_reset = sdhci_pci_hw_reset, .irq = sdhci_cqhci_irq, };