scsi: ufs: add quirk to increase host PA_SaveConfigTime
The maximum value PA_SaveConfigTime is 250 (10us) but this is not enough
for some vendors. Gear switch from PWM to HS may fail even with this
max. PA_SaveConfigTime. Gear switch can be issued by host controller as
an error recovery and any software delay will not help on this case so
we need to increase PA_SaveConfigTime to >32us as per vendor
recommendation. This change adds a quirk to increase the
PA_SaveConfigTime parameter.
Reviewed-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 7d9ff22..08cd26ed 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -266,7 +266,7 @@ struct ufs_pwr_mode_info {
* @setup_task_mgmt: called before any task management request is issued
* to set some things
* @hibern8_notify: called around hibern8 enter/exit
- * to configure some things
+ * @apply_dev_quirks: called to apply device specific quirks
* @suspend: called during host controller PM callback
* @resume: called during host controller PM callback
* @dbg_register_dump: used to dump controller debug information
@@ -293,7 +293,8 @@ struct ufs_hba_variant_ops {
void (*setup_xfer_req)(struct ufs_hba *, int, bool);
void (*setup_task_mgmt)(struct ufs_hba *, int, u8);
void (*hibern8_notify)(struct ufs_hba *, enum uic_cmd_dme,
- enum ufs_notify_change_status);
+ enum ufs_notify_change_status);
+ int (*apply_dev_quirks)(struct ufs_hba *);
int (*suspend)(struct ufs_hba *, enum ufs_pm_op);
int (*resume)(struct ufs_hba *, enum ufs_pm_op);
void (*dbg_register_dump)(struct ufs_hba *hba);
@@ -839,6 +840,13 @@ static inline void ufshcd_vops_hibern8_notify(struct ufs_hba *hba,
return hba->vops->hibern8_notify(hba, cmd, status);
}
+static inline int ufshcd_vops_apply_dev_quirks(struct ufs_hba *hba)
+{
+ if (hba->vops && hba->vops->apply_dev_quirks)
+ return hba->vops->apply_dev_quirks(hba);
+ return 0;
+}
+
static inline int ufshcd_vops_suspend(struct ufs_hba *hba, enum ufs_pm_op op)
{
if (hba->vops && hba->vops->suspend)