From ef65b1fdd1f808f8b796182e2a117196de66e941 Mon Sep 17 00:00:00 2001 From: Felix Qin Date: Mon, 29 Apr 2024 15:19:55 +0800 Subject: mmc: core: Increase the timeout period of the ACMD41 command Extensive testing has shown that some specific SD cards require an increased command timeout to be successfully initialized. More info: Platform: Rockchip SoC + DW Multimedia host Controller SD card: Xvv microSD CMH34A17TMA12 (Made in Korea) Note: The SD card is custom-made by the customer in collaboration with the wafer foundry. Signed-off-by: Felix Qin Acked-by: Avri Altman Reviewed-by: Dragan Simic Link: https://lore.kernel.org/r/20240429071955.163282-1-xiaokeqinhealth@126.com Signed-off-by: Ulf Hansson --- drivers/mmc/core/sd_ops.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'drivers/mmc') diff --git a/drivers/mmc/core/sd_ops.c b/drivers/mmc/core/sd_ops.c index 9a777b0fea27..8b9b34286ef3 100644 --- a/drivers/mmc/core/sd_ops.c +++ b/drivers/mmc/core/sd_ops.c @@ -19,8 +19,13 @@ #include "sd_ops.h" #include "mmc_ops.h" +/* + * Extensive testing has shown that some specific SD cards + * require an increased command timeout to be successfully + * initialized. + */ #define SD_APP_OP_COND_PERIOD_US (10 * 1000) /* 10ms */ -#define SD_APP_OP_COND_TIMEOUT_MS 1000 /* 1s */ +#define SD_APP_OP_COND_TIMEOUT_MS 2000 /* 2s */ struct sd_app_op_cond_busy_data { struct mmc_host *host; -- cgit v1.2.3-73-gaa49b