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MMC core:

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- Fix workaround for SD UHS-I voltage switch
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Merge tag 'mmc-v6.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:

 - Fix workaround for SD UHS-I voltage switch

* tag 'mmc-v6.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: core: Fix inconsistent sd3_bus_mode at UHS-I SD voltage switch failure
  mmc: core: Fix UHS-I SD 1.8V workaround branch
This commit is contained in:
Linus Torvalds 2022-09-02 15:03:12 -07:00
commit b307e70457
1 changed files with 18 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
drivers/mmc/core/sd.c
View File

@ -949,15 +949,16 @@ int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
/* Erase init depends on CSD and SSR */
mmc_init_erase(card);
/*
* Fetch switch information from card.
*/
err = mmc_read_switch(card);
if (err)
return err;
}
/*
* Fetch switch information from card. Note, sd3_bus_mode can change if
* voltage switch outcome changes, so do this always.
*/
err = mmc_read_switch(card);
if (err)
return err;
/*
* For SPI, enable CRC as appropriate.
* This CRC enable is located AFTER the reading of the
@ -1480,26 +1481,15 @@ retry:
if (!v18_fixup_failed && !mmc_host_is_spi(host) && mmc_host_uhs(host) &&
mmc_sd_card_using_v18(card) &&
host->ios.signal_voltage != MMC_SIGNAL_VOLTAGE_180) {
/*
* Re-read switch information in case it has changed since
* oldcard was initialized.
*/
if (oldcard) {
err = mmc_read_switch(card);
if (err)
goto free_card;
}
if (mmc_sd_card_using_v18(card)) {
if (mmc_host_set_uhs_voltage(host) ||
mmc_sd_init_uhs_card(card)) {
v18_fixup_failed = true;
mmc_power_cycle(host, ocr);
if (!oldcard)
mmc_remove_card(card);
goto retry;
}
goto done;
if (mmc_host_set_uhs_voltage(host) ||
mmc_sd_init_uhs_card(card)) {
v18_fixup_failed = true;
mmc_power_cycle(host, ocr);
if (!oldcard)
mmc_remove_card(card);
goto retry;
}
goto cont;
}
/* Initialization sequence for UHS-I cards */
@ -1534,7 +1524,7 @@ retry:
mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
}
}
cont:
if (!oldcard) {
/* Read/parse the extension registers. */
err = sd_read_ext_regs(card);
@ -1566,7 +1556,7 @@ retry:
err = -EINVAL;
goto free_card;
}
done:
host->card = card;
return 0;