[PATCH v3 1/1] mmc: core: increase the timeout period of the ACMD41 command.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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 <xiaokeqinhealth@xxxxxxx>

---
v2: Add more info
v3: Based on the __mmc_poll_for_busy API for modification
---
 drivers/mmc/core/sd_ops.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/core/sd_ops.c b/drivers/mmc/core/sd_ops.c
index 3ce1ff336826..a1c028303ba7 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;
-- 
2.34.1





[Index of Archives]     [Linux Memonry Technology]     [Linux USB Devel]     [Linux Media]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux