From: Chaotian Jing <chaotian.jing@mediatek.com>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Chaotian Jing <chaotian.jing@mediatek.com>,
yong mao <yong.mao@mediatek.com>,
Linus Walleij <linus.walleij@linaro.org>,
Heiner Kallweit <hkallweit1@gmail.com>,
Phong LE <ple@baylibre.com>, <linux-mmc@vger.kernel.org>,
<devicetree@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <srv_heupstream@mediatek.com>
Subject: [PATCH v6 11/12] mmc: mediatek: improve eMMC hs400 mode read performance
Date: Mon, 16 Oct 2017 09:46:38 +0800 [thread overview]
Message-ID: <1508118399-21828-12-git-send-email-chaotian.jing@mediatek.com> (raw)
In-Reply-To: <1508118399-21828-1-git-send-email-chaotian.jing@mediatek.com>
enlarge outstanding value to improve read performance
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
---
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 d75a93d..95759bb 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;
};
@@ -1747,6 +1751,9 @@ 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;
}
@@ -1997,6 +2004,7 @@ 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);
}
@@ -2014,6 +2022,7 @@ 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
next prev parent reply other threads:[~2017-10-16 1:48 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-16 1:46 [PATCH v6 00/12] mmc: mediatek: add support of mt2701/mt2712 Chaotian Jing
2017-10-16 1:46 ` [PATCH v6 01/12] mmc: dt-bindings: Add reg/source_cg/latch-ck for Mediatek MMC bindings Chaotian Jing
2017-10-23 2:31 ` Chaotian Jing
2017-10-23 22:36 ` Rob Herring
2017-10-16 1:46 ` [PATCH v6 02/12] mmc: mediatek: add support of mt2701/mt2712 Chaotian Jing
2017-10-24 7:58 ` Sean Wang
2017-10-16 1:46 ` [PATCH v6 03/12] arm64: dts: mt8173: remove "mediatek,mt8135-mmc" from mmc nodes Chaotian Jing
2017-10-25 21:11 ` Ulf Hansson
2017-11-02 11:50 ` Matthias Brugger
2017-11-02 14:13 ` Ulf Hansson
2017-10-16 1:46 ` [PATCH v6 04/12] mmc: mediatek: make hs400_tune_response only for mt8173 Chaotian Jing
2017-10-16 1:46 ` [PATCH v6 05/12] mmc: mediatek: add pad_tune0 support Chaotian Jing
2017-10-16 1:46 ` [PATCH v6 06/12] mmc: mediatek: add async fifo and data tune support Chaotian Jing
2017-10-16 1:46 ` [PATCH v6 07/12] mmc: mediatek: add busy_check support Chaotian Jing
2017-10-16 1:46 ` [PATCH v6 08/12] mmc: mediatek: add stop_clk fix and enhance_rx support Chaotian Jing
2017-10-16 1:46 ` [PATCH v6 09/12] mmc: mediatek: add support of source_cg clock Chaotian Jing
2017-10-16 1:46 ` [PATCH v6 10/12] mmc: mediatek: add latch-ck support Chaotian Jing
2017-10-16 1:46 ` Chaotian Jing [this message]
2017-10-16 1:46 ` [PATCH v6 12/12] mmc: mediatek: perfer to use rise edge latching for cmd line Chaotian Jing
2017-10-30 11:39 ` [PATCH v6 00/12] mmc: mediatek: add support of mt2701/mt2712 Ulf Hansson
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