[PATCH v2 2/4] phy: rockchip-samsung-dcphy: factor MIPI D-PHY power on/off into helpers

To prepare for adding a receiver (CSI) direction next to the existing
transmitter (DSI) one, rename the transmitter power-on helper to
samsung_mipi_dphy_tx_power_on() and gather its teardown into a new
samsung_mipi_dphy_tx_power_off(), so both directions can later be
powered on and off through symmetric helpers.

No functional change intended.

Signed-off-by: Jason Yang <[email protected]>
Assisted-by: Claude:claude-opus-4-8
---
 drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c b/drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c
index cbd780556da8..d0d77421bd4b 100644
--- a/drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c
+++ b/drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c
@@ -1332,7 +1332,7 @@ samsung_mipi_dphy_data_lane_timing_init(struct samsung_mipi_dcphy *samsung)
 	regmap_write(samsung->regmap, DPHY_MD3_TIME_CON4, 0x1f4);
 }
 
-static int samsung_mipi_dphy_power_on(struct samsung_mipi_dcphy *samsung)
+static int samsung_mipi_dphy_tx_power_on(struct samsung_mipi_dcphy *samsung)
 {
 	int ret;
 
@@ -1358,6 +1358,14 @@ static int samsung_mipi_dphy_power_on(struct samsung_mipi_dcphy *samsung)
 	return 0;
 }
 
+static int samsung_mipi_dphy_tx_power_off(struct samsung_mipi_dcphy *samsung)
+{
+	samsung_mipi_dphy_lane_disable(samsung);
+	samsung_mipi_dcphy_pll_disable(samsung);
+
+	return 0;
+}
+
 static int samsung_mipi_dcphy_power_on(struct phy *phy)
 {
 	struct samsung_mipi_dcphy *samsung = phy_get_drvdata(phy);
@@ -1368,7 +1376,7 @@ static int samsung_mipi_dcphy_power_on(struct phy *phy)
 
 	switch (samsung->type) {
 	case PHY_TYPE_DPHY:
-		return samsung_mipi_dphy_power_on(samsung);
+		return samsung_mipi_dphy_tx_power_on(samsung);
 	default:
 		/* CPHY part to be implemented later */
 		return -EOPNOTSUPP;
@@ -1383,16 +1391,11 @@ static int samsung_mipi_dcphy_power_off(struct phy *phy)
 
 	switch (samsung->type) {
 	case PHY_TYPE_DPHY:
-		samsung_mipi_dphy_lane_disable(samsung);
-		break;
+		return samsung_mipi_dphy_tx_power_off(samsung);
 	default:
 		/* CPHY part to be implemented later */
 		return -EOPNOTSUPP;
 	}
-
-	samsung_mipi_dcphy_pll_disable(samsung);
-
-	return 0;
 }
 
 static int

-- 
2.43.0