Commit ef65b1fd authored by Felix Qin's avatar Felix Qin Committed by Ulf Hansson
Browse files

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: default avatarFelix Qin <xiaokeqinhealth@126.com>
Acked-by: default avatarAvri Altman <avri.altman@wdc.com>
Reviewed-by: default avatarDragan Simic <dsimic@manjaro.org>
Link: https://lore.kernel.org/r/20240429071955.163282-1-xiaokeqinhealth@126.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 3ae4f265

drivers/mmc/core/sd_ops.c

+6 −1
Original line number Diff line number Diff line
@@ -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;