Hi,
On 2016/9/1 22:24, alex lemberg wrote:
Signed-off-by: alex lemberg <alex.lemberg@xxxxxxxxxxx>
It would be nice to add some change log.:)
This part is still on my TODO list, so very nice to see
you provide patches for this. But I don't see we reach
an agreement at that time for whether it would be sane to
set this bit for kernel. I remember Adrian's opinion was to
let userspace take over the ownership of this, and Ulf maybe
had no hard opinon for this(Ulf, right? :)).
---
drivers/mmc/core/mmc.c | 6 ++++++
include/linux/mmc/card.h | 1 +
include/linux/mmc/mmc.h | 1 +
3 files changed, 8 insertions(+)
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index f2d185c..e2e987f 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -531,6 +531,12 @@ static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
if (!card->ext_csd.man_bkops_en)
pr_debug("%s: MAN_BKOPS_EN bit is not set\n",
mmc_hostname(card->host));
+ card->ext_csd.auto_bkops_en =
+ (ext_csd[EXT_CSD_BKOPS_EN] &
+ EXT_CSD_AUTO_BKOPS_MASK);
+ if (!card->ext_csd.auto_bkops_en)
+ pr_debug("%s: AUTO_BKOPS_EN bit is not set\n",
+ mmc_hostname(card->host));
}
/* check whether the eMMC card supports HPI */
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 73fad83..aaedb68 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -84,6 +84,7 @@ struct mmc_ext_csd {
unsigned int hpi_cmd; /* cmd used as HPI */
bool bkops; /* background support bit */
bool man_bkops_en; /* manual bkops enable bit */
+ bool auto_bkops_en; /* auto bkops enable bit */
unsigned int data_sector_size; /* 512 bytes or 4KB */
unsigned int data_tag_unit_size; /* DATA TAG UNIT size */
unsigned int boot_ro_lock; /* ro lock support */
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index c376209..0fe3908 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -436,6 +436,7 @@ struct _mmc_csd {
* BKOPS modes
*/
#define EXT_CSD_MANUAL_BKOPS_MASK 0x01
+#define EXT_CSD_AUTO_BKOPS_MASK 0x02
/*
* MMC_SWITCH access modes
--
Best Regards
Shawn Lin
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