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[v2,5/8] scsi: ufs-mediatek: Disable reset confirm feature by UniPro

Message ID 20220623035052.18802-6-stanley.chu@mediatek.com
State New
Headers show
Series Provide features and fixes in MediaTek UFS platform | expand

Commit Message

Stanley Chu June 23, 2022, 3:50 a.m. UTC 
From: Po-Wen Kao <powen.kao@mediatek.com>

In MediaTek UFS platforms, UniPro will not return reset confirm
if it is in POWERDOWN state thus hang issue may happen while disabling
UFSHCI. Simply disable this feature before UniPro leaves POWERDOWN
state.

Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Po-Wen Kao <powen.kao@mediatek.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
---
 drivers/ufs/host/ufs-mediatek.c | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index 8184e871ff8e..348966dbad78 100755
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -1079,6 +1079,11 @@  static int ufs_mtk_link_set_lpm(struct ufs_hba *hba)
 {
 	int err;
 
+	/* Disable reset confirm feature by UniPro */
+	ufshcd_writel(hba,
+		      (ufshcd_readl(hba, REG_UFS_XOUFS_CTRL) & ~0x100),
+		      REG_UFS_XOUFS_CTRL);
+
 	err = ufs_mtk_unipro_set_lpm(hba, true);
 	if (err) {
 		/* Resume UniPro state for following error recovery */