diff options
| author | Ulf Hansson <ulf.hansson@linaro.org> | 2022-04-26 15:05:26 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2022-04-26 15:05:26 +0300 |
| commit | c25a7e5d18ba6e88932ef8ebcf6635cca630d032 (patch) | |
| tree | 947c62eeefd7d66ab9f10e8cd2ddcda2fbc1ebe2 /drivers/mmc | |
| parent | cfb646613649c013591a9d5a4dc8f5db3e7ac25b (diff) | |
| parent | 4bc31edebde51fcf8ad0794763b8679a7ecb5ec0 (diff) | |
| download | linux-c25a7e5d18ba6e88932ef8ebcf6635cca630d032.tar.xz | |
Merge branch 'fixes' into next
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/mmc.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 5d8d9f72476f..82ca62c8669c 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -1384,13 +1384,17 @@ static int mmc_select_hs400es(struct mmc_card *card) goto out_err; } + /* + * Bump to HS timing and frequency. Some cards don't handle + * SEND_STATUS reliably at the initial frequency. + */ mmc_set_timing(host, MMC_TIMING_MMC_HS); + mmc_set_bus_speed(card); + err = mmc_switch_status(card, true); if (err) goto out_err; - mmc_set_clock(host, card->ext_csd.hs_max_dtr); - /* Switch card to DDR with strobe bit */ val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE; err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, @@ -1448,7 +1452,7 @@ out_err: static int mmc_select_hs200(struct mmc_card *card) { struct mmc_host *host = card->host; - unsigned int old_timing, old_signal_voltage; + unsigned int old_timing, old_signal_voltage, old_clock; int err = -EINVAL; u8 val; @@ -1479,8 +1483,17 @@ static int mmc_select_hs200(struct mmc_card *card) false, true, MMC_CMD_RETRIES); if (err) goto err; + + /* + * Bump to HS timing and frequency. Some cards don't handle + * SEND_STATUS reliably at the initial frequency. + * NB: We can't move to full (HS200) speeds until after we've + * successfully switched over. + */ old_timing = host->ios.timing; + old_clock = host->ios.clock; mmc_set_timing(host, MMC_TIMING_MMC_HS200); + mmc_set_clock(card->host, card->ext_csd.hs_max_dtr); /* * For HS200, CRC errors are not a reliable way to know the @@ -1493,8 +1506,10 @@ static int mmc_select_hs200(struct mmc_card *card) * mmc_select_timing() assumes timing has not changed if * it is a switch error. */ - if (err == -EBADMSG) + if (err == -EBADMSG) { + mmc_set_clock(host, old_clock); mmc_set_timing(host, old_timing); + } } err: if (err) { |