When host set the host->tuning_delay, even the last tuning
command need a delay, otherwise the first command after the
tuning will meet issue.
Take i.MX7D as an example, there will be the following log:
mmc2: switch to high-speed from hs200 failed, err:-110
mmc2: error -110 whilst initialising MMC card
Signed-off-by: Haibo Chen <haibo.chen@xxxxxxx>
---
drivers/mmc/host/sdhci.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index a22e11a65658..6af09740ca59 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2376,6 +2376,10 @@ static int __sdhci_execute_tuning(struct sdhci_host *host, u32 opcode)
return -ETIMEDOUT;
}
+ /* Spec does not require a delay between tuning cycles */
+ if (host->tuning_delay > 0)
+ mdelay(host->tuning_delay);
+
ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
if (!(ctrl & SDHCI_CTRL_EXEC_TUNING)) {
if (ctrl & SDHCI_CTRL_TUNED_CLK)
@@ -2383,9 +2387,6 @@ static int __sdhci_execute_tuning(struct sdhci_host *host, u32 opcode)
break;
}
- /* Spec does not require a delay between tuning cycles */
- if (host->tuning_delay > 0)
- mdelay(host->tuning_delay);
}
pr_info("%s: Tuning failed, falling back to fixed sampling clock\n",
--
2.17.1
