linux-kernel - [PATCH v2 0/1] TCPM logbuffer wraparound

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Message-ID: <20251103052450.1028813-1-badhri@google.com>
Date: Mon,  3 Nov 2025 05:24:49 +0000
From: Badhri Jagan Sridharan <badhri@...gle.com>
To: heikki.krogerus@...ux.intel.com, gregkh@...uxfoundation.org, 
	badhri@...gle.com
Cc: amitsd@...gle.com, kyletso@...gle.com, rdbabiera@...gle.com, 
	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: [PATCH v2 0/1] TCPM logbuffer wraparound

This is a follow up on a previous discussion:
https://lore.kernel.org/lkml/20230410073134.488762-1-badhri@google.com/.

With this change, TCPM log buffer will now wrap around when full and
will not self-clear upon being read (dumped). A Kconfig option and a
corresponding debugfs file node are introduced to allow opt-in back to
the previous, non-wrapping, self-clearing behavior if required.
This is an interim step while TCPM logging infrastructure is migrated
to the standard event trace system. 

Badhri Jagan Sridharan (1):
  tcpm: Wraparound tcpm log and dont clear them when read

 drivers/usb/typec/tcpm/Kconfig |  8 ++++++
 drivers/usb/typec/tcpm/tcpm.c  | 51 ++++++++++++++++++++++++++++++++--
 2 files changed, 57 insertions(+), 2 deletions(-)

base-commit: 18514fd70ea4ca9de137bb3bceeac1bac4bcad75
-- 
2.51.1.930.gacf6e81ea2-goog