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| author | Maksim Kiselev <bigunclemax@gmail.com> | 2024-04-02 12:35:39 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-02 16:35:26 +0200 |
| commit | 7778de90d58e28d86452ee0843cb4d319800ce3d (patch) | |
| tree | f6ee020de0e20b4c43c453bb7b6b04efa535e21e | |
| parent | f653b04a818c490b045c97834d559911479aa1c5 (diff) | |
| download | linux-stable-7778de90d58e28d86452ee0843cb4d319800ce3d.tar.gz linux-stable-7778de90d58e28d86452ee0843cb4d319800ce3d.tar.bz2 linux-stable-7778de90d58e28d86452ee0843cb4d319800ce3d.zip | |
mmc: sdhci-of-dwcmshc: th1520: Increase tuning loop count to 128
commit ace323f80b9bc6734289a4e8a77938a3ce964c7d upstream.
Fix SD card tuning error by increasing tuning loop count
from 40(MAX_TUNING_LOOP) to 128.
For some reason the tuning algorithm requires to move through all the taps
of delay line even if the THRESHOLD_MODE (bit 2 in AT_CTRL_R) is used
instead of the LARGEST_WIN_MODE.
Tested-by: Drew Fustini <drew@pdp7.com>
Tested-by: Xi Ruoyao <xry111@xry111.site>
Signed-off-by: Maksim Kiselev <bigunclemax@gmail.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Fixes: 43658a542ebf ("mmc: sdhci-of-dwcmshc: Add support for T-Head TH1520")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20240402093539.184287-1-bigunclemax@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/mmc/host/sdhci-of-dwcmshc.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c index fa29460fd290..60b42126a4ed 100644 --- a/drivers/mmc/host/sdhci-of-dwcmshc.c +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c @@ -612,6 +612,7 @@ static int th1520_execute_tuning(struct sdhci_host *host, u32 opcode) /* perform tuning */ sdhci_start_tuning(host); + host->tuning_loop_count = 128; host->tuning_err = __sdhci_execute_tuning(host, opcode); if (host->tuning_err) { /* disable auto-tuning upon tuning error */ |