| Message ID | 1467974414-18845-1-git-send-email-tobias.doerffel@ed-chemnitz.de |
|---|---|
| State | Accepted |
| Commit | 26c0c15786039fb437925c08205702169462e343 |
| Delegated to: | Hans de Goede |
| Headers | show |
Hi, On 08-07-16 12:40, Tobias Doerffel wrote: > With a recent bunch of SD3.0 cards in our A20-based board we > experienced data transfer rates of about 250 KiB/s instead of 10 MiB/s > with previous cards from the same vendor (both 4 GB/class 10). By > increasing status register polling rate from 1 kHz to 1 MHz we were > able to reach the original transfer rates again. With the old cards > we now even reach about 16 MiB/s. > > Signed-off-by: Tobias Doerffel <tobias.doerffel@ed-chemnitz.de> Thanks, this tremendously speeds up boot on some of my boards, good stuff! I've merge this locally and it should show up in u-boot-sunxi/next later today. Regards, Hans > --- > drivers/mmc/sunxi_mmc.c | 10 +++++----- > 1 file changed, 5 insertions(+), 5 deletions(-) > > diff --git a/drivers/mmc/sunxi_mmc.c b/drivers/mmc/sunxi_mmc.c > index ce2dc4a..36da3b3 100644 > --- a/drivers/mmc/sunxi_mmc.c > +++ b/drivers/mmc/sunxi_mmc.c > @@ -269,18 +269,18 @@ static int mmc_trans_data_by_cpu(struct mmc *mmc, struct mmc_data *data) > unsigned i; > unsigned *buff = (unsigned int *)(reading ? data->dest : data->src); > unsigned byte_cnt = data->blocksize * data->blocks; > - unsigned timeout_msecs = byte_cnt >> 8; > - if (timeout_msecs < 2000) > - timeout_msecs = 2000; > + unsigned timeout_usecs = (byte_cnt >> 8) * 1000; > + if (timeout_usecs < 2000000) > + timeout_usecs = 2000000; > > /* Always read / write data through the CPU */ > setbits_le32(&mmchost->reg->gctrl, SUNXI_MMC_GCTRL_ACCESS_BY_AHB); > > for (i = 0; i < (byte_cnt >> 2); i++) { > while (readl(&mmchost->reg->status) & status_bit) { > - if (!timeout_msecs--) > + if (!timeout_usecs--) > return -1; > - udelay(1000); > + udelay(1); > } > > if (reading) >
diff --git a/drivers/mmc/sunxi_mmc.c b/drivers/mmc/sunxi_mmc.c index ce2dc4a..36da3b3 100644 --- a/drivers/mmc/sunxi_mmc.c +++ b/drivers/mmc/sunxi_mmc.c @@ -269,18 +269,18 @@ static int mmc_trans_data_by_cpu(struct mmc *mmc, struct mmc_data *data) unsigned i; unsigned *buff = (unsigned int *)(reading ? data->dest : data->src); unsigned byte_cnt = data->blocksize * data->blocks; - unsigned timeout_msecs = byte_cnt >> 8; - if (timeout_msecs < 2000) - timeout_msecs = 2000; + unsigned timeout_usecs = (byte_cnt >> 8) * 1000; + if (timeout_usecs < 2000000) + timeout_usecs = 2000000; /* Always read / write data through the CPU */ setbits_le32(&mmchost->reg->gctrl, SUNXI_MMC_GCTRL_ACCESS_BY_AHB); for (i = 0; i < (byte_cnt >> 2); i++) { while (readl(&mmchost->reg->status) & status_bit) { - if (!timeout_msecs--) + if (!timeout_usecs--) return -1; - udelay(1000); + udelay(1); } if (reading)
With a recent bunch of SD3.0 cards in our A20-based board we experienced data transfer rates of about 250 KiB/s instead of 10 MiB/s with previous cards from the same vendor (both 4 GB/class 10). By increasing status register polling rate from 1 kHz to 1 MHz we were able to reach the original transfer rates again. With the old cards we now even reach about 16 MiB/s. Signed-off-by: Tobias Doerffel <tobias.doerffel@ed-chemnitz.de> --- drivers/mmc/sunxi_mmc.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)