enlarge outstanding value to improve read performance
Signed-off-by: Chaotian Jing <chaotian.jing@xxxxxxxxxxxx>
---
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 3a1756a..4cffc04 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;
};
@@ -1761,6 +1765,9 @@ 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;
}
@@ -2013,6 +2020,7 @@ 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);
}
@@ -2032,6 +2040,7 @@ 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
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
