> -----Original Message----- > From: Ulf Hansson [mailto:ulf.hansson@xxxxxxxxxx] > Sent: 2020年7月6日 22:49 > To: BOUGH CHEN <haibo.chen@xxxxxxx> > Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>; linux-mmc@xxxxxxxxxxxxxxx; > Pali Rohár <pali@xxxxxxxxxx>; dl-linux-imx <linux-imx@xxxxxxx>; Andy Duan > <fugang.duan@xxxxxxx>; Doug Anderson <dianders@xxxxxxxxxxxx>; > huyue2@xxxxxxxxxx; Matthias Kaehlcke <mka@xxxxxxxxxxxx> > Subject: Re: [PATCH] mmc: sdio: fix clock rate setting for SDR12/SDR25 mode > > On Mon, 22 Jun 2020 at 10:30, <haibo.chen@xxxxxxx> wrote: > > > > From: Haibo Chen <haibo.chen@xxxxxxx> > > > > In current code logic, when work in SDR12/SDR25 mode, the final clock > > rate is incorrect, just the legancy 400KHz, because the > > card->sw_caps.sd3_bus_mode do not has the flag SD_MODE_UHS_SDR12 or > > SD_MODE_UHS_SDR25. Besides, SDIO_SPEED_SDR12 is actually value 0, and > > every mode need to config the timing and clock rate, so remove the > > ‘if’ operator. > > > > Signed-off-by: Haibo Chen <haibo.chen@xxxxxxx> > > This looks like a rather serious error, should we tag this for stable? Yes, need to do that. Cc: <stable@xxxxxxxxxxxxxxx> Best Regards Haibo Chen > > In the meantime, I have applied this for next to get it tested, thanks! > > Kind regards > Uffe > > > > > --- > > drivers/mmc/core/sdio.c | 15 ++++++++------- > > 1 file changed, 8 insertions(+), 7 deletions(-) > > > > diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index > > 0e32ca7b9488..7b40553d3934 100644 > > --- a/drivers/mmc/core/sdio.c > > +++ b/drivers/mmc/core/sdio.c > > @@ -176,15 +176,18 @@ static int sdio_read_cccr(struct mmc_card *card, > u32 ocr) > > if (mmc_host_uhs(card->host)) { > > if (data & SDIO_UHS_DDR50) > > > card->sw_caps.sd3_bus_mode > > - |= > SD_MODE_UHS_DDR50; > > + |= > SD_MODE_UHS_DDR50 | SD_MODE_UHS_SDR50 > > + | > > + SD_MODE_UHS_SDR25 | SD_MODE_UHS_SDR12; > > > > if (data & SDIO_UHS_SDR50) > > > card->sw_caps.sd3_bus_mode > > - |= > SD_MODE_UHS_SDR50; > > + |= > SD_MODE_UHS_SDR50 | SD_MODE_UHS_SDR25 > > + | > > + SD_MODE_UHS_SDR12; > > > > if (data & SDIO_UHS_SDR104) > > > card->sw_caps.sd3_bus_mode > > - |= > SD_MODE_UHS_SDR104; > > + |= > SD_MODE_UHS_SDR104 | SD_MODE_UHS_SDR50 > > + | > > + SD_MODE_UHS_SDR25 | SD_MODE_UHS_SDR12; > > } > > > > ret = mmc_io_rw_direct(card, 0, 0, @@ > -537,10 > > +540,8 @@ static int sdio_set_bus_speed_mode(struct mmc_card *card) > > max_rate = min_not_zero(card->quirk_max_rate, > > card->sw_caps.uhs_max_dtr); > > > > - if (bus_speed) { > > - mmc_set_timing(card->host, timing); > > - mmc_set_clock(card->host, max_rate); > > - } > > + mmc_set_timing(card->host, timing); > > + mmc_set_clock(card->host, max_rate); > > > > return 0; > > } > > -- > > 2.17.1 > >
