From: Alice Chao <alice.chao@mediatek.com>
Date: Wed, 3 Sep 2025 02:44:44 +0000 (+0800)
Subject: scsi: ufs: host: mediatek: Fix adapt issue after PA_Init
X-Git-Tag: v6.18-rc1~100^2~18^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=d73836cb8535b3078e4d2a57913f301baec58a33;p=thirdparty%2Fkernel%2Fstable.git

scsi: ufs: host: mediatek: Fix adapt issue after PA_Init

Address the issue where the host does not send adapt to the device after
PA_Init success. Ensure the adapt process is correctly initiated for
devices with IP version MT6899 and above, resolving communication issues
between the host and device.

Signed-off-by: Alice Chao <alice.chao@mediatek.com>
Reviewed-by: Peter Wang <peter.wang@mediatek.com>
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---

diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index 0780dcc8505ef..ea939e51eafb8 100644
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -1551,8 +1551,19 @@ static int ufs_mtk_pre_link(struct ufs_hba *hba)
 
 	return ret;
 }
+
 static void ufs_mtk_post_link(struct ufs_hba *hba)
 {
+	struct ufs_mtk_host *host = ufshcd_get_variant(hba);
+	u32 tmp;
+
+	/* fix device PA_INIT no adapt */
+	if (host->ip_ver >= IP_VER_MT6899) {
+		ufshcd_dme_get(hba, UIC_ARG_MIB(VS_DEBUGOMC), &tmp);
+		tmp |= 0x100;
+		ufshcd_dme_set(hba, UIC_ARG_MIB(VS_DEBUGOMC), tmp);
+	}
+
 	/* enable unipro clock gating feature */
 	ufs_mtk_cfg_unipro_cg(hba, true);
 }