On 2017년 11월 17일 18:38, Guillaume Gardet wrote: > > > Le 17/11/2017 à 10:36, Lukasz Majewski a écrit : >> 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.... > > Not sure it ever worked on this target.
Could you give me the debug log after enabled DEBUG? Best Regards, Jaehoon Chung > > Guillaume > >> >>> 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 > > _______________________________________________ > U-Boot mailing list > U-Boot@lists.denx.de > https://lists.denx.de/listinfo/u-boot _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot