From 10fb4f87438d99b2ef06aea38ca2f0454725e8b5 Mon Sep 17 00:00:00 2001
From: jongmin jeong <jjmin.jeong@samsung.com>
Date: Mon, 18 Oct 2021 21:42:03 +0900
Subject: [PATCH] scsi: ufs: Add quirk to enable host controller without PH
configuration
Samsung ExynosAuto v9 SoC virtual hosts do not support device management.
Add a quirk to skip the physical host interface configuration part that
cannot be performed in the virtual host.
Link: https://lore.kernel.org/r/20211018124216.153072-3-chanho61.park@samsung.com
Cc: James E.J. Bottomley <jejb@linux.ibm.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Bart Van Assche <bvanassche@acm.org>
Suggested-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: jongmin jeong <jjmin.jeong@samsung.com>
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
drivers/scsi/ufs/ufshcd.c | 3 +++
drivers/scsi/ufs/ufshcd.h | 6 ++++++
2 files changed, 9 insertions(+)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index dc7ce9eef0c78..f5ba8f953b876 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -8031,6 +8031,9 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, bool init_dev_params)
if (ret)
goto out;
+ if (hba->quirks & UFSHCD_QUIRK_SKIP_PH_CONFIGURATION)
+ goto out;
+
/* Debug counters initialization */
ufshcd_clear_dbg_ufs_stats(hba);
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index e67181a013e36..4ceb3c7e65b4b 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -595,6 +595,12 @@ enum ufshcd_quirks {
* support UIC command
*/
UFSHCD_QUIRK_BROKEN_UIC_CMD = 1 << 15,
+
+ /*
+ * This quirk needs to be enabled if the host controller cannot
+ * support physical host configuration.
+ */
+ UFSHCD_QUIRK_SKIP_PH_CONFIGURATION = 1 << 16,
};
enum ufshcd_caps {