diff options
| author | Julien Masson <jmasson@baylibre.com> | 2021-11-05 16:34:14 +0300 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2021-11-18 01:04:59 +0300 |
| commit | faf5d4d53d435bb4e15768cc135b6268b5104bbc (patch) | |
| tree | 805e543b2e15f06cb5ccd27ea68e5dc08624efd8 /drivers/mmc/mtk-sd.c | |
| parent | 55de0c19314046e886897fb9bb57eb5ef586814c (diff) | |
| download | u-boot-faf5d4d53d435bb4e15768cc135b6268b5104bbc.tar.xz | |
mmc: mtk-sd: implement waiting for DAT0 line state
With the recent changes on mmc driver, we saw that the boot is ~5 secs
longer compared to v2021.07 on mediatek platforms.
This regression is seen during mmc_init and caused by the following
patch [1].
Indeed since we did not support poll dat0, we fulfilled the condition
of [1] and a delay of 500 ms was added for every __mmc_switch call.
By adding the support of wait_dat0(), we now don't need to mdelay
during mmc_init anymore.
[1]: https://patchwork.ozlabs.org/project/uboot/patch/1629192034-64056-1-git-send-email-ye.li@nxp.com/
Signed-off-by: Julien Masson <jmasson@baylibre.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Diffstat (limited to 'drivers/mmc/mtk-sd.c')
| -rw-r--r-- | drivers/mmc/mtk-sd.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/mmc/mtk-sd.c b/drivers/mmc/mtk-sd.c index 8599f095bc..97182ffd7f 100644 --- a/drivers/mmc/mtk-sd.c +++ b/drivers/mmc/mtk-sd.c @@ -1724,6 +1724,20 @@ static int msdc_drv_bind(struct udevice *dev) return mmc_bind(dev, &plat->mmc, &plat->cfg); } +static int msdc_ops_wait_dat0(struct udevice *dev, int state, int timeout_us) +{ + struct msdc_host *host = dev_get_priv(dev); + int ret; + u32 reg; + + ret = readl_poll_sleep_timeout(&host->base->msdc_ps, reg, + !!(reg & MSDC_PS_DAT0) == !!state, + 1000, /* 1 ms */ + timeout_us); + + return ret; +} + static const struct dm_mmc_ops msdc_ops = { .send_cmd = msdc_ops_send_cmd, .set_ios = msdc_ops_set_ios, @@ -1732,6 +1746,7 @@ static const struct dm_mmc_ops msdc_ops = { #ifdef MMC_SUPPORTS_TUNING .execute_tuning = msdc_execute_tuning, #endif + .wait_dat0 = msdc_ops_wait_dat0, }; static const struct msdc_compatible mt7620_compat = { |