linux-kernel - [PATCH v3] scsi: ufs: exynos: call phy_notify

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Message-Id: <20260109-ufs-exynos-phy_notify_pmstate-v3-1-7eb692e271af@linaro.org>
Date: Fri, 09 Jan 2026 11:40:14 +0000
From: Peter Griffin <peter.griffin@...aro.org>
To: Alim Akhtar <alim.akhtar@...sung.com>, 
 "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>, 
 "Martin K. Petersen" <martin.petersen@...cle.com>, 
 Krzysztof Kozlowski <krzk@...nel.org>
Cc: linux-scsi@...r.kernel.org, linux-samsung-soc@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 kernel-team@...roid.com, andre.draszik@...aro.org, willmcvicker@...gle.com, 
 tudor.ambarus@...aro.org, jyescas@...gle.com, bvanassche@....org, 
 Peter Griffin <peter.griffin@...aro.org>
Subject: [PATCH v3] scsi: ufs: exynos: call phy_notify_state() from hibern8
 callbacks

Notify the ufs phy of the hibern8 link state so that it can program the
appropriate values.

Signed-off-by: Peter Griffin <peter.griffin@...aro.org>
---
Note: The phy_notify_state() API is part of v6.19-rc1 and onwards.
---
Changes in v3:
- Add 'static const' (Bart)
- Drop Barts reviewed-by tag for now
- Link to v2: https://lore.kernel.org/r/20260107-ufs-exynos-phy_notify_pmstate-v2-1-2b823a25208b@linaro.org

Changes in v2:
- Collect up tags
- Rebased onto next-20260106
- Update phy_notify_pmstate() to phy_notify_state()
- Link to v1: https://lore.kernel.org/r/20250703-ufs-exynos-phy_notify_pmstate-v1-1-49446d7852d1@linaro.org
---
 drivers/ufs/host/ufs-exynos.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/ufs/host/ufs-exynos.c b/drivers/ufs/host/ufs-exynos.c
index 70d195179ebaa01f38331faaee6f8349211c4c3b..76fee3a79c77b7117a2c02f380f8c78d702ad173 100644
--- a/drivers/ufs/host/ufs-exynos.c
+++ b/drivers/ufs/host/ufs-exynos.c
@@ -1568,12 +1568,17 @@ static void exynos_ufs_pre_hibern8(struct ufs_hba *hba, enum uic_cmd_dme cmd)
 {
 	struct exynos_ufs *ufs = ufshcd_get_variant(hba);
 	struct exynos_ufs_uic_attr *attr = ufs->drv_data->uic_attr;
+	static const union phy_notify phystate = {
+		.ufs_state = PHY_UFS_HIBERN8_EXIT
+	};
 
 	if (cmd == UIC_CMD_DME_HIBER_EXIT) {
 		if (ufs->opts & EXYNOS_UFS_OPT_BROKEN_AUTO_CLK_CTRL)
 			exynos_ufs_disable_auto_ctrl_hcc(ufs);
 		exynos_ufs_ungate_clks(ufs);
 
+		phy_notify_state(ufs->phy, phystate);
+
 		if (ufs->opts & EXYNOS_UFS_OPT_USE_SW_HIBERN8_TIMER) {
 			static const unsigned int granularity_tbl[] = {
 				1, 4, 8, 16, 32, 100
@@ -1600,12 +1605,17 @@ static void exynos_ufs_pre_hibern8(struct ufs_hba *hba, enum uic_cmd_dme cmd)
 static void exynos_ufs_post_hibern8(struct ufs_hba *hba, enum uic_cmd_dme cmd)
 {
 	struct exynos_ufs *ufs = ufshcd_get_variant(hba);
+	static const union phy_notify phystate = {
+		.ufs_state = PHY_UFS_HIBERN8_ENTER
+	};
 
 	if (cmd == UIC_CMD_DME_HIBER_ENTER) {
 		ufs->entry_hibern8_t = ktime_get();
 		exynos_ufs_gate_clks(ufs);
 		if (ufs->opts & EXYNOS_UFS_OPT_BROKEN_AUTO_CLK_CTRL)
 			exynos_ufs_enable_auto_ctrl_hcc(ufs);
+
+		phy_notify_state(ufs->phy, phystate);
 	}
 }
 

---
base-commit: 6cd6c12031130a349a098dbeb19d8c3070d2dfbe
change-id: 20250703-ufs-exynos-phy_notify_pmstate-c0e9db95ac66

Best regards,
-- 
Peter Griffin <peter.griffin@...aro.org>