@@ -5277,6 +5277,9 @@ 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
@@ -511,6 +511,11 @@ 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 {
We have two knobs to flush for write booster, i.e. fWriteBoosterBufferFlushDuringHibernate and fWriteBoosterBufferFlushEn. However, many product makers uses only fWriteBoosterBufferFlushDuringHibernate, because this can reportedly cover most scenarios and there have been some reports that flush by fWriteBoosterBufferFlushEn could lead to raise power consumption thanks to unexpected internal operations. So we need a way to enable or disable fWriteBoosterEn operations. For those case, this quirk will allow to avoid manual flush Signed-off-by: Kiwoong Kim <kwmad.kim@samsung.com> --- drivers/scsi/ufs/ufshcd.c | 3 +++ drivers/scsi/ufs/ufshcd.h | 5 +++++ 2 files changed, 8 insertions(+)