linux-kernel - [RFC/PATCH 2/2] phy: rockchip: usbdp: implement .set

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250710152252.2532020-3-jkeeping@inmusicbrands.com>
Date: Thu, 10 Jul 2025 16:22:50 +0100
From: John Keeping <jkeeping@...usicbrands.com>
To: linux-rockchip@...ts.infradead.org
Cc: John Keeping <jkeeping@...usicbrands.com>,
	Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Heiko Stuebner <heiko@...ech.de>,
	Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sebastian Reichel <sebastian.reichel@...labora.com>,
	Nicolas Frattaroli <nicolas.frattaroli@...labora.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	linux-usb@...r.kernel.org,
	linux-phy@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [RFC/PATCH 2/2] phy: rockchip: usbdp: implement .set_mode

When the orientation of a type C cable changes, usbdp set the new
configuration in its internal state but does not write this to the
hardware.

Make use of phy_ops::set_mode to write this new state.  This should be
called by the USB controller when it is notified of a role change
(assuming it is acting as the role switch) and will be called at a point
when the controller does not expect the phy to be operating normally.

Signed-off-by: John Keeping <jkeeping@...usicbrands.com>
---
 drivers/phy/rockchip/phy-rockchip-usbdp.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/phy/rockchip/phy-rockchip-usbdp.c b/drivers/phy/rockchip/phy-rockchip-usbdp.c
index c066cc0a7b4f1..00368fb09307a 100644
--- a/drivers/phy/rockchip/phy-rockchip-usbdp.c
+++ b/drivers/phy/rockchip/phy-rockchip-usbdp.c
@@ -1335,9 +1335,23 @@ static int rk_udphy_usb3_phy_exit(struct phy *phy)
 	return 0;
 }
 
+static int rk_udphy_usb3_phy_set_mode(struct phy *phy, enum phy_mode mode, int submode)
+{
+	struct rk_udphy *udphy = phy_get_drvdata(phy);
+	int ret = 0;
+
+	mutex_lock(&udphy->mutex);
+	if (udphy->mode != UDPHY_MODE_NONE)
+		ret = rk_udphy_init(udphy);
+	mutex_unlock(&udphy->mutex);
+
+	return ret;
+}
+
 static const struct phy_ops rk_udphy_usb3_phy_ops = {
 	.init		= rk_udphy_usb3_phy_init,
 	.exit		= rk_udphy_usb3_phy_exit,
+	.set_mode	= rk_udphy_usb3_phy_set_mode,
 	.owner		= THIS_MODULE,
 };
 
-- 
2.50.0