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Wed, 22 Jan 2025 03:00:27 -0800 From: Henry Lin To: JC Kuo , Vinod Koul , "Kishon Vijay Abraham I" , Thierry Reding , Jonathan Hunter , Henry Lin CC: , , , BH Hsieh , Subject: [PATCH v2] phy: tegra: xusb: reset VBUS & ID OVERRIDE Date: Wed, 22 Jan 2025 18:59:43 +0800 Message-ID: <20250122105943.8057-1-henryl@nvidia.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF00020E63:EE_|PH0PR12MB8050:EE_ X-MS-Office365-Filtering-Correlation-Id: 2017e464-3346-43fa-3911-08dd3ad40a72 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|36860700013|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?nRkw5nc2IUp/SIu9VuExsFCdwmoYTaShJxBY+8duafJT51w9X75DmCoAxvKs?= =?us-ascii?Q?yRPHpSGtRphPsOdkZt+Yl4pxQZlTftXzPyqMVeDY8xEyOMEA9ikZr2b1U0Rj?= =?us-ascii?Q?nDkiah/DLxdMfNYmC7yDTw1OiokTFBksf1S4HxUm4xtn+Leu3G5F5j1Y0GAF?= =?us-ascii?Q?JA7g+fqtnbWmiVVeStq5DoYnAUZTA+eXvhapJ2co3C8C3BZw7yWfGe/TQJZz?= =?us-ascii?Q?gEEHThEbFHwzGonI/MPJhkW6pI9XJC+lHwV2CtX3LmjwK5rb41/E+CA2IfoO?= =?us-ascii?Q?E9a3L9QPJ3V2h8mi9Pu5KeG5ZyrMj1hx5CArvWYksz7LkfWEC0f6kZ9kXICG?= =?us-ascii?Q?80e8Az0/6wrkn3p/X0gtJ1BRHIMq1T0hPhLp8h/PpM3Gf3iPC/MeqeBTUm9a?= =?us-ascii?Q?sEzc999sU1wXSl5HRgmJaWErpUMtlLeorutZKGr6h8CJCJVL92Vg2P7mumvd?= =?us-ascii?Q?fnz/kDQetFiEZ78e1XCOXO9Q5qxhpJe5ziX/zQ7y37ioP4lnR1tmz8M5lj3E?= =?us-ascii?Q?QxXl9Dd7sXPf9NgOKexKy5ENiZuvnZ1dg/Fe9ire4vyBYZtNPtW7C5xARWAT?= =?us-ascii?Q?F42FM+dM65Dg/FPUb/oLo+yZRksaF6IUItF/hf7N/n+QqxnpqZiWosNc+aOk?= =?us-ascii?Q?r0NU4CHGgOrAX0IJ6MXexOonNGx2P5hDn+Iuzlj32If8kDYKLPclxEFxSJ6K?= =?us-ascii?Q?l4tJLDkYvyHRii3ZKuei9mXGZhxDY7CMCr/RkoyJPrQNAOOTmiXH85YhPqn2?= =?us-ascii?Q?AL3DeQWoxgtDEWjstXuQwlUHrD6tBS5SOjGSnpRPhvizwi+P7mCHnZ1jR2K6?= =?us-ascii?Q?k1P4j1xjzf2ZbyViySUyF9NW53dR9wqKffkTtSf3cX/m9IyzttRszD0hFDNG?= =?us-ascii?Q?Y7PcNZDAgipE3rK1+OaK9kLxAfjVMUSI3pyxBlFAw1I+rac3dCAn7y5c6g5q?= =?us-ascii?Q?dzqxCL97JtgRmsgEoR2VKl3MF0vl26lvgfypcdNbEKslVDj1Oc3KFIICLqRX?= =?us-ascii?Q?grkUaL5Rl0ARy45Fx7OkQdUt7IkFr0ieJRzA+ru2Vxln3Bnvn9rqmjOOTuF0?= =?us-ascii?Q?cR2oHj4BbQU3UoVivjR5XNNUbOYqoBz3N0rWeqKYjCRfxxCKzSKHTkQcz3Ps?= =?us-ascii?Q?a00kgDRD44XXw+dCqhL9fcXJcxOU5pSSY25sPD2SFfHYVkBZwLsO8Cfv+hSi?= =?us-ascii?Q?Su2pyIYpKbcsXAavuzkUDBxkz1IMoxC5YAjwoqmCD7iSTFg0LuABApU6U7Cl?= =?us-ascii?Q?+QoHAvIDZ1iEf4wAMQqXonK6BIm0PXHyjWARDAmNbQJavJ1boRynJfqQO6on?= =?us-ascii?Q?rhMOMVUVwjzYRul6BSoTuJFKNW9lOBhGFCoFY9dtsBQXy9gmn9OTh8bXjZl4?= =?us-ascii?Q?w6yVFkcR4zrDdTYY9n6OHu4VBIdEsGpHQqXbMjg442TqXtZ5jCRNdtWl/Etq?= =?us-ascii?Q?SKkOJSJXca3oTCrggVwnFk4PS82j5Zt9xc745fLo+n5fimEbLYrDrJli0zfE?= =?us-ascii?Q?2dBqokkc+LZ5PnE=3D?= X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(376014)(36860700013)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Jan 2025 11:00:53.7182 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2017e464-3346-43fa-3911-08dd3ad40a72 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF00020E63.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR12MB8050 Content-Type: text/plain; charset="utf-8" From: BH Hsieh Observed VBUS_OVERRIDE & ID_OVERRIDE might be programmed with unexpected value prior to XUSB PADCTL driver, this could also occur in virtualization scenario. For example, UEFI firmware programs ID_OVERRIDE=3DGROUNDED to set a type-c port to host mode and keeps the value to kernel. If the type-c port is connected a usb host, below errors can be observed right after usb host mode driver gets probed. The errors would keep until usb role class driver detects the type-c port as device mode and notifies usb device mode driver to set both ID_OVERRIDE and VBUS_OVERRIDE to correct value by XUSB PADCTL driver. [ 173.765814] usb usb3-port2: Cannot enable. Maybe the USB cable is bad? [ 173.765837] usb usb3-port2: config error Taking virtualization into account, asserting XUSB PADCTL reset would break XUSB functions used by other guest OS, hence only reset VBUS & ID OVERRIDE of the port in utmi_phy_init. Fixes: bbf711682cd5 ("phy: tegra: xusb: Add Tegra186 support") Cc: stable@vger.kernel.org Change-Id: Ic63058d4d49b4a1f8f9ab313196e20ad131cc591 Signed-off-by: BH Hsieh Signed-off-by: Henry Lin --- V1 -> V2: Only reset VBUS/ID OVERRIDE for otg/peripheral port drivers/phy/tegra/xusb-tegra186.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/phy/tegra/xusb-tegra186.c b/drivers/phy/tegra/xusb-teg= ra186.c index 0f60d5d1c167..fae6242aa730 100644 --- a/drivers/phy/tegra/xusb-tegra186.c +++ b/drivers/phy/tegra/xusb-tegra186.c @@ -928,6 +928,7 @@ static int tegra186_utmi_phy_init(struct phy *phy) unsigned int index =3D lane->index; struct device *dev =3D padctl->dev; int err; + u32 reg; =20 port =3D tegra_xusb_find_usb2_port(padctl, index); if (!port) { @@ -935,6 +936,16 @@ static int tegra186_utmi_phy_init(struct phy *phy) return -ENODEV; } =20 + if (port->mode =3D=3D USB_DR_MODE_OTG || + port->mode =3D=3D USB_DR_MODE_PERIPHERAL) { + /* reset VBUS&ID OVERRIDE */ + reg =3D padctl_readl(padctl, USB2_VBUS_ID); + reg &=3D ~VBUS_OVERRIDE; + reg &=3D ~ID_OVERRIDE(~0); + reg |=3D ID_OVERRIDE_FLOATING; + padctl_writel(padctl, reg, USB2_VBUS_ID); + } + if (port->supply && port->mode =3D=3D USB_DR_MODE_HOST) { err =3D regulator_enable(port->supply); if (err) { --=20 2.17.1