[PATCH v15 03/16] phy: rockchip: usbdp: Do not lose USB3 PHY status

From: Sebastian Reichel <sebastian.reichel@collabora.com>
To: Vinod Koul <vkoul@kernel.org>,
	Manivannan Sadhasivam <mani@kernel.org>,
	 Neil Armstrong <neil.armstrong@linaro.org>,
	 Heiko Stuebner <heiko@sntech.de>,
	Frank Wang <frank.wang@rock-chips.com>,
	 Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	 Conor Dooley <conor+dt@kernel.org>,
	Philipp Zabel <p.zabel@pengutronix.de>
Cc: Andy Yan <andy.yan@rock-chips.com>,
	Dmitry Baryshkov <lumag@kernel.org>,
	 Yubing Zhang <yubing.zhang@rock-chips.com>,
	 Alexey Charkov <alchark@flipper.net>,
	Igor Paunovic <royalnet026@gmail.com>,
	 linux-phy@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org,
	 linux-rockchip@lists.infradead.org,
	linux-kernel@vger.kernel.org,  kernel@collabora.com,
	devicetree@vger.kernel.org,
	 Sebastian Reichel <sebastian.reichel@collabora.com>
Subject: [PATCH v15 03/16] phy: rockchip: usbdp: Do not lose USB3 PHY status
Date: Tue, 15 Sep 2026 15:49:50 +0200	[thread overview]
Message-ID: <20260915-rockchip-usbdp-cleanup-v15-3-80e2c11d1ce8@collabora.com> (raw)
In-Reply-To: <20260915-rockchip-usbdp-cleanup-v15-0-80e2c11d1ce8@collabora.com>

By default (i.e. without manually enabling runtime PM) DWC3 requests the
USB3 PHY once and keeps it enabled all the time. When DisplayPort is
being requested later on, a mode change is needed. This re-initializes
the PHY. During re-initialization the status variable has incorrectly
been cleared, which means the tracking information for USB3 is lost.

This is not an immediate problem, since the DP side keeps the PHY
enabled. But once DP is toggled off, the whole PHY will be disabled.
This is a problem, because the USB side still needs it powered.

Fix things by not clearing the status flags.

Fixes: 2f70bbddeb45 ("phy: rockchip: add usbdp combo phy driver")
Tested-by: Igor Paunovic <royalnet026@gmail.com> # Orange Pi 5 Plus
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
---
 drivers/phy/rockchip/phy-rockchip-usbdp.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-usbdp.c b/drivers/phy/rockchip/phy-rockchip-usbdp.c
index 13649b52e99b..da0fa75fc9f0 100644
--- a/drivers/phy/rockchip/phy-rockchip-usbdp.c
+++ b/drivers/phy/rockchip/phy-rockchip-usbdp.c
@@ -1007,7 +1007,6 @@ static int rk_udphy_power_on(struct rk_udphy *udphy, u8 mode)
 			rk_udphy_u3_port_disable(udphy, false);
 		udphy->mode_change = false;
 	} else if (udphy->mode_change) {
-		udphy->status = UDPHY_MODE_NONE;
 		if (udphy->mode == UDPHY_MODE_DP)
 			rk_udphy_u3_port_disable(udphy, true);
 

-- 
2.53.0


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