We have two knobs to flush for write booster, i.e.
fWriteBoosterEn, fWriteBoosterBufferFlushEn.
However, many product makers uses only fWriteBoosterBufferFlushEn,
because this can reportedly cover most scenarios and
there have been some reports that flush by fWriteBoosterEn could
lead raise power consumption thanks to unexpected internal
operations. So we need a way to enable or disable fWriteBoosterEn.
Signed-off-by: Kiwoong Kim <kwmad.kim@xxxxxxxxxxx>
---
drivers/scsi/ufs/ufshcd.c | 3 +++
drivers/scsi/ufs/ufshcd.h | 5 +++++
2 files changed, 8 insertions(+)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 3076222..5392877 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -5296,6 +5296,9 @@ static int ufshcd_wb_toggle_flush_during_h8(struct ufs_hba *hba, bool set)
static inline void ufshcd_wb_toggle_flush(struct ufs_hba *hba, bool enable)
{
+ if (hba->quirks & UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL)
+ return;
+
if (enable)
ufshcd_wb_buf_flush_enable(hba);
else
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index b2ef18f..21d5741 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -520,6 +520,11 @@ enum ufshcd_quirks {
* OCS FATAL ERROR with device error through sense data
*/
UFSHCD_QUIRK_BROKEN_OCS_FATAL_ERROR = 1 << 10,
+
+ /*
+ * This quirk needs to disable manual flush for write booster
+ */
+ UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL = 1 << 11,
};
enum ufshcd_caps {
--
2.7.4
