lkml.org 
[lkml]   [2017]   [Oct]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v2 12/13] mmc: mediatek: improve eMMC hs400 mode read performance
    Date
    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 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
    \
     
     \ /
      Last update: 2017-10-09 13:37    [W:4.083 / U:0.088 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site