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: ******************************************************************************** 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; } ******************************************************************************** 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? Guillaume _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
