Hi, On 04/09/2018 09:02 PM, Guillaume Gardet wrote: > Hi Jaehoon, > > There are problems with SD card access on Samsung Chromebook (snow) with > latest master (and also 2018.05-rc1 and 2018.03). > > eMMC is ok, but SD card access leads to 'unable to select a mode' problem. If > I disable HS mode, I can access the SD card without problem: > ******************************************************************************** > ******************************************************************************** > > Once we try to select HS mode, all access to SD card result in failure, even > when trying to setup a lower frequency mode, including SD legacy at 25 MHz. > > Any idea what is going? Maybe you have fixes pending?
Sorry for late. Hmm. I will check your issue. Just disable MMC_MODE_HS, then it's working fine? or HS_52MHz? Best Regards, Jaehoon Chung > > > Guillaume > > diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c > index 23f642980bf..28f4fa0f213 100644 > --- a/drivers/mmc/dw_mmc.c > +++ b/drivers/mmc/dw_mmc.c > @@ -508,7 +508,8 @@ void dwmci_setup_cfg(struct mmc_config *cfg, struct > dwmci_host *host, > cfg->host_caps |= MMC_MODE_4BIT; > cfg->host_caps &= ~MMC_MODE_8BIT; > } > - cfg->host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz; > + /* Temp workaround for Chromebook snow to avoid the 'unable to select a > mode' error */ > +// cfg->host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz; > > cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT; > } > _______________________________________________ U-Boot mailing list [email protected] https://lists.denx.de/listinfo/u-boot
