Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751658AbdILJIj (ORCPT ); Tue, 12 Sep 2017 05:08:39 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:26888 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751607AbdILJIc (ORCPT ); Tue, 12 Sep 2017 05:08:32 -0400 X-UUID: 0f19439cdef8413bb4ff1f404d3541eb-20170912 From: Chaotian Jing To: Ulf Hansson CC: Rob Herring , Mark Rutland , Matthias Brugger , Catalin Marinas , Will Deacon , Chaotian Jing , yong mao , Linus Walleij , Javier Martinez Canillas , Heiner Kallweit , Phong LE , , , , , , Subject: [PATCH 11/12] mmc: mediatek: improve eMMC hs400 mode read performance Date: Tue, 12 Sep 2017 17:07:51 +0800 Message-ID: <1505207272-16983-12-git-send-email-chaotian.jing@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1505207272-16983-1-git-send-email-chaotian.jing@mediatek.com> References: <1505207272-16983-1-git-send-email-chaotian.jing@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2317 Lines: 64 enlarge outstanding value to improve read performance Signed-off-by: Chaotian Jing --- drivers/mmc/host/mtk-sd.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index 3328d59..49d4d79 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -81,6 +81,7 @@ #define PAD_DS_TUNE 0x188 #define PAD_CMD_TUNE 0x18c #define EMMC50_CFG0 0x208 +#define EMMC50_CFG3 0x220 #define SDC_FIFO_CFG 0x228 /*--------------------------------------------------------------------------*/ @@ -249,6 +250,8 @@ #define EMMC50_CFG_CRCSTS_EDGE (0x1 << 3) /* RW */ #define EMMC50_CFG_CFCSTS_SEL (0x1 << 4) /* RW */ +#define EMMC50_CFG3_OUTS_WR (0x1f << 0) /* RW */ + #define SDC_FIFO_CFG_WRVALIDSEL (0x1 << 24) /* RW */ #define SDC_FIFO_CFG_RDVALIDSEL (0x1 << 25) /* RW */ @@ -318,6 +321,7 @@ struct msdc_save_para { u32 pad_ds_tune; u32 pad_cmd_tune; u32 emmc50_cfg0; + u32 emmc50_cfg3; u32 sdc_fifo_cfg; }; @@ -1757,6 +1761,9 @@ static int msdc_prepare_hs400_tuning(struct mmc_host *mmc, struct mmc_ios *ios) writel(host->hs400_ds_delay, host->base + PAD_DS_TUNE); /* hs400 mode must set it to 0 */ sdr_clr_bits(host->base + MSDC_PATCH_BIT2, MSDC_PATCH_BIT2_CFGCRCSTS); + /* to improve read performance, set outstanding to 2 */ + sdr_set_field(host->base + EMMC50_CFG3, EMMC50_CFG3_OUTS_WR, 2); + return 0; } @@ -2010,6 +2017,7 @@ static void msdc_save_reg(struct msdc_host *host) host->save_para.pad_ds_tune = readl(host->base + PAD_DS_TUNE); host->save_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE); host->save_para.emmc50_cfg0 = readl(host->base + EMMC50_CFG0); + host->save_para.emmc50_cfg3 = readl(host->base + EMMC50_CFG3); host->save_para.sdc_fifo_cfg = readl(host->base + SDC_FIFO_CFG); } @@ -2029,6 +2037,7 @@ static void msdc_restore_reg(struct msdc_host *host) writel(host->save_para.pad_ds_tune, host->base + PAD_DS_TUNE); writel(host->save_para.pad_cmd_tune, host->base + PAD_CMD_TUNE); writel(host->save_para.emmc50_cfg0, host->base + EMMC50_CFG0); + writel(host->save_para.emmc50_cfg3, host->base + EMMC50_CFG3); writel(host->save_para.sdc_fifo_cfg, host->base + SDC_FIFO_CFG); } -- 1.8.1.1.dirty