diff options
| author | Chaotian Jing <chaotian.jing@mediatek.com> | 2017-10-16 03:46:38 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-11-02 15:20:26 +0100 |
| commit | c8609b22529755be6f75d9b0aeb2577f4bfa83de (patch) | |
| tree | 7bd7566c78ca480ae5fc14375b07891ed5e1b4e3 /drivers/mmc/host/mtk-sd.c | |
| parent | mmc: mediatek: add latch-ck support (diff) | |
| download | linux-c8609b22529755be6f75d9b0aeb2577f4bfa83de.tar.xz linux-c8609b22529755be6f75d9b0aeb2577f4bfa83de.zip | |
mmc: mediatek: improve eMMC hs400 mode read performance
enlarge outstanding value to improve read performance
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Tested-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/mtk-sd.c')
| -rw-r--r-- | drivers/mmc/host/mtk-sd.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index d8bd416fd471..3247a5aed7d8 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); } |