linux-kernel - [PATCH] ufs: core: Disable auto h8 before ssu

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Date:   Tue, 11 Oct 2022 10:16:53 +0800
From:   Ten Gao <gaoyankaigeren@...il.com>
To:     Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        Bart Van Assche <bvanassche@....org>,
        "James E . J . Bottomley" <jejb@...ux.ibm.com>,
        Bean Huo <beanhuo@...ron.com>,
        Adrian Hunter <adrian.hunter@...el.com>
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ufs: core: Disable auto h8 before ssu

From: Ten Gao <ten.gao@...soc.com>

Ensure auto h8 will not hit dme h8,and there won't be two h8 in a row
after ssu.

Signed-off-by: Ten Gao <ten.gao@...soc.com>
---
 drivers/ufs/core/ufshcd.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index a202d7d5240d..42f93648d796 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -4256,6 +4256,14 @@ void ufshcd_auto_hibern8_update(struct ufs_hba *hba, u32 ahit)
 }
 EXPORT_SYMBOL_GPL(ufshcd_auto_hibern8_update);
 
+void ufshcd_auto_hibern8_disable(struct ufs_hba *hba)
+{
+	if (!ufshcd_is_auto_hibern8_supported(hba))
+		return;
+
+	ufshcd_writel(hba, 0, REG_AUTO_HIBERNATE_IDLE_TIMER);
+}
+
 void ufshcd_auto_hibern8_enable(struct ufs_hba *hba)
 {
 	if (!ufshcd_is_auto_hibern8_supported(hba))
@@ -9036,6 +9044,8 @@ static int __ufshcd_wl_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
 	if (ret)
 		goto enable_scaling;
 
+	ufshcd_auto_hibern8_disable(hba);
+
 	if (req_dev_pwr_mode != hba->curr_dev_pwr_mode) {
 		if (pm_op != UFS_RUNTIME_PM)
 			/* ensure that bkops is disabled */
-- 
2.17.1