linux-kernel - [PATCH v4 0/4] usb: typec: ucsi: Update UCSI alternate mode

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Message-ID: <20240510184324.2944101-1-jthies@google.com>
Date: Fri, 10 May 2024 18:43:20 +0000
From: Jameson Thies <jthies@...gle.com>
To: heikki.krogerus@...ux.intel.com, linux-usb@...r.kernel.org
Cc: jthies@...gle.com, pmalani@...omium.org, bleung@...gle.com, 
	abhishekpandit@...omium.org, andersson@...nel.org, 
	dmitry.baryshkov@...aro.org, fabrice.gasnier@...s.st.com, 
	gregkh@...uxfoundation.org, hdegoede@...hat.com, neil.armstrong@...aro.org, 
	rajaram.regupathy@...el.com, saranya.gopal@...el.com, 
	linux-kernel@...r.kernel.org
Subject: [PATCH v4 0/4] usb: typec: ucsi: Update UCSI alternate mode

Hi Heikki,

This series appliess some changes to the UCSI driver to help support AP
driven alternate mode entry. This includes...

1. An update to the altmode sysfs group after registration to make
"active" writable.
2. A change to the ucsi_partner_task delay when queuing
ucsi_check_altmodes to prevent it from running before other discovery
functions.
3. An update to always define a number of alternate modes for partners
and plugs.

Not related to AP driven altmode entry, there is an additional fix for a
null derefrence in this series.

I tested the series on a ChromeOS v6.8 kernel merged with usb-testing.
That build had some additinal patches to enable a PPM in ChromeOS. Let
me know if you have any questions.

Thanks,
Jameson

Changes in V4:
- Updates to the commit messages.

Changes in V3:
- Returns typec_port_register_altmode call from
ucsi_register_displayport when CONFIG_TYPEC_DP_ALTMODE is not enabled.

Changes in V2:
- Checks for error response from ucsi_register_displayport when
registering DisplayPort alternate mode.

Abhishek Pandit-Subedi (2):
  usb: typec: ucsi: Fix null pointer dereference in trace
  usb: typec: Update sysfs when setting ops

Jameson Thies (2):
  usb: typec: ucsi: Delay alternate mode discovery
  usb: typec: ucsi: Always set number of alternate modes

 drivers/usb/typec/altmodes/displayport.c |  2 +-
 drivers/usb/typec/class.c                | 18 +++++++++++++++++-
 drivers/usb/typec/ucsi/displayport.c     |  2 +-
 drivers/usb/typec/ucsi/ucsi.c            | 18 +++++++++++++-----
 drivers/usb/typec/ucsi/ucsi.h            |  2 +-
 include/linux/usb/typec.h                |  3 +++
 6 files changed, 36 insertions(+), 9 deletions(-)


base-commit: e4306116b5e93748b3eaa7666aa55c390b48a8f4
-- 
2.45.0.118.g7fe29c98d7-goog