From mboxrd@z Thu Jan 1 00:00:00 1970 From: hkallweit1@gmail.com (Heiner Kallweit) Date: Tue, 14 Feb 2017 21:05:47 +0100 Subject: [PATCH 01/18] mmc: meson-gx: set segment host parameters In-Reply-To: <420b75a9-b8c2-b3d7-ae60-3ed8a5a18ead@gmail.com> References: <420b75a9-b8c2-b3d7-ae60-3ed8a5a18ead@gmail.com> Message-ID: To: linus-amlogic@lists.infradead.org List-Id: linus-amlogic.lists.infradead.org Setting the segment parameters boosted the read performance from 13 MB/s to 32 MB/s in my case. Default for segment size is only 4k (PAGE_SIZE). Signed-off-by: Heiner Kallweit --- drivers/mmc/host/meson-gx-mmc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c index 5a959783..1ad66f84 100644 --- a/drivers/mmc/host/meson-gx-mmc.c +++ b/drivers/mmc/host/meson-gx-mmc.c @@ -118,6 +118,7 @@ #define SD_EMMC_CFG_RESP_TIMEOUT 256 /* in clock cycles */ #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */ #define MUX_CLK_NUM_PARENTS 2 +#define MESON_MMC_MAX_SEGS 512 struct meson_host { struct device *dev; @@ -789,8 +790,10 @@ static int meson_mmc_probe(struct platform_device *pdev) if (ret) goto free_host; + mmc->max_segs = MESON_MMC_MAX_SEGS; mmc->max_blk_count = CMD_CFG_LENGTH_MASK; mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size; + mmc->max_seg_size = mmc->max_req_size; /* data bounce buffer */ host->bounce_buf_size = mmc->max_req_size; -- 2.11.1