On Thu, 16 Nov 2017 13:29:56 +0100 Guillaume Gardet <guillaume.gar...@free.fr> wrote:
> I found a workaround. If I disable MMC_MODE_HS_52MHz, then it is > working fine. > > I guess there is a better way to implement the following patch ? > > ********************************************************************** > diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c > index 23f642980b..a6a0934eef 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; > + /* MMC_MODE_HS_52MHz is broken (at least) on Samsung Snow, so > disbale it for now */ > + cfg->host_caps |= MMC_MODE_HS; This seems like a workaround. The root cause of the problem is the regression with HS 52MHz.... > > cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT; > } > ********************************************************************** > > > Guillaume > > > > Le 15/11/2017 à 11:27, Guillaume Gardet a écrit : > > > > > > Le 15/11/2017 à 11:22, Guillaume Gardet a écrit : > >> Forgot to Cc ML. Done now. > >> > >> > >> Le 15/11/2017 à 11:14, Guillaume Gardet a écrit : > >>> Hello, > >>> > >>> I tested U-Boot v2017.09 on a Samsung Snow (Chromebook ARM) and > >>> while mmc0 (internal eMMC) is working fine, mmc1 (external SD > >>> slot) does not work. I get the following error for 'mmc dev 1' > >>> command: mmc_init: -110, time 30 > > > > Please also note that on boot (or on 1st 'mmc dev 1' cmd if I stop > > auto-boot), I firstly get: mmc_init: -5, time 39 > > > > Then, all next attempts retruns: > > mmc_init: -110, time 30 > > > > > > Guillaume > > > > > >>> > >>> Any idea what could be wrong? > >>> > >>> Guillaume > >>> > >>> > >> > > > > _______________________________________________ > U-Boot mailing list > U-Boot@lists.denx.de > https://lists.denx.de/listinfo/u-boot Best regards, Lukasz Majewski -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de
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