linux-kernel - [PATCH v5 0/4] USB Type-C alternate mode priorities

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Message-ID: <20251124124639.1101335-1-akuchynski@chromium.org>
Date: Mon, 24 Nov 2025 12:46:35 +0000
From: Andrei Kuchynski <akuchynski@...omium.org>
To: Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Abhishek Pandit-Subedi <abhishekpandit@...omium.org>,
	Benson Leung <bleung@...omium.org>,
	Jameson Thies <jthies@...gle.com>,
	Tzung-Bi Shih <tzungbi@...nel.org>,
	linux-usb@...r.kernel.org,
	chrome-platform@...ts.linux.dev
Cc: Guenter Roeck <groeck@...omium.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
	"Christian A. Ehrhardt" <lk@...e.de>,
	Abel Vesa <abel.vesa@...aro.org>,
	Pooja Katiyar <pooja.katiyar@...el.com>,
	Venkat Jayaraman <venkat.jayaraman@...el.com>,
	linux-kernel@...r.kernel.org,
	Andrei Kuchynski <akuchynski@...omium.org>
Subject: [PATCH v5 0/4] USB Type-C alternate mode priorities

This patch series introduces a mechanism for setting USB Type-C alternate
mode priorities. It allows the user to specify their preferred order for
mode selection, such as USB4, Thunderbolt, or DisplayPort.

A new sysfs attribute named 'priority' is exposed to provide user-space
control over the mode selection process.

This series was tested on a Android OS device running kernel 6.18.0-rc6.

Changes in v5:
- Patches 3 and 4 (v4) have been consolidated into a singular patch,
keeping the mode priority implementation within drivers/usb/typec/class.c.

Andrei Kuchynski (4):
  usb: typec: Add mode_control field to port property
  platform/chrome: cros_ec_typec: Set no_mode_control flag
  usb: typec: ucsi: Set no_mode_control flag
  usb: typec: Expose alternate mode priority via sysfs

 Documentation/ABI/testing/sysfs-class-typec | 11 +++
 drivers/platform/chrome/cros_ec_typec.c     |  1 +
 drivers/usb/typec/class.c                   | 99 ++++++++++++++++++++-
 drivers/usb/typec/class.h                   |  1 +
 drivers/usb/typec/ucsi/ucsi.c               |  1 +
 include/linux/usb/typec.h                   |  2 +
 include/linux/usb/typec_altmode.h           |  1 +
 7 files changed, 112 insertions(+), 4 deletions(-)

-- 
2.52.0.rc2.455.g230fcf2819-goog