On Tue, 2 Apr 2024 at 11:36, Maksim Kiselev <bigunclemax@xxxxxxxxx> wrote: > > 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@xxxxxxxx> > Tested-by: Xi Ruoyao <xry111@xxxxxxxxxxx> > Signed-off-by: Maksim Kiselev <bigunclemax@xxxxxxxxx> Applied for fixes and by adding a fixes+stable tag, thanks! Kind regards Uffe > --- > Previous discussion was here: > https://lore.kernel.org/lkml/CALHCpMhc1F5Ue7U_gsDXREHUZRVQJNYRCJxYxoNqbN=-39jf7A@xxxxxxxxxxxxxx/ > > drivers/mmc/host/sdhci-of-dwcmshc.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c > index 8d6cfb648096..1001b6ea1a89 100644 > --- a/drivers/mmc/host/sdhci-of-dwcmshc.c > +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c > @@ -706,6 +706,7 @@ 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 */ > -- > 2.40.1 >
