diff options
| author | Haibo Chen <haibo.chen@nxp.com> | 2023-08-30 17:39:22 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2023-09-26 15:08:05 +0200 |
| commit | 32a9cdb8869dc111a0c96cf8e1762be9684af15b (patch) | |
| tree | feba2cb7f9a90311a74bae16fb0917e6772bb79c /drivers/mmc/core/sdio.c | |
| parent | 1bbac8d6af085408885675c1e29b2581250be124 (diff) | |
mmc: core: sdio: hold retuning if sdio in 1-bit mode
tuning only support in 4-bit mode or 8 bit mode, so in 1-bit mode,
need to hold retuning.
Find this issue when use manual tuning method on imx93. When system
resume back, SDIO WIFI try to switch back to 4 bit mode, first will
trigger retuning, and all tuning command failed.
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Fixes: dfa13ebbe334 ("mmc: host: Add facility to support re-tuning")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230830093922.3095850-1-haibo.chen@nxp.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/core/sdio.c')
| -rw-r--r-- | drivers/mmc/core/sdio.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index f64b9ac76a5c..5914516df2f7 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -1089,8 +1089,14 @@ static int mmc_sdio_resume(struct mmc_host *host) } err = mmc_sdio_reinit_card(host); } else if (mmc_card_wake_sdio_irq(host)) { - /* We may have switched to 1-bit mode during suspend */ + /* + * We may have switched to 1-bit mode during suspend, + * need to hold retuning, because tuning only supprt + * 4-bit mode or 8 bit mode. + */ + mmc_retune_hold_now(host); err = sdio_enable_4bit_bus(host->card); + mmc_retune_release(host); } if (err) |