linux-kernel - [PATCH 0/2] usb: typec-mux: broadcast typec state to next mux for ptn36502 & nb7vpq904m retimers

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Date: Mon, 27 May 2024 09:45:28 +0200
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Heikki Krogerus <heikki.krogerus@...ux.intel.com>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Bjorn Andersson <andersson@...nel.org>, 
 Luca Weiss <luca.weiss@...rphone.com>, linux-arm-msm@...r.kernel.org, 
 linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Neil Armstrong <neil.armstrong@...aro.org>
Subject: [PATCH 0/2] usb: typec-mux: broadcast typec state to next mux for
 ptn36502 & nb7vpq904m retimers

In the Type-C graph, a retimer is usually in between the USB-C
connector and the USB3/DP combo PHY, and this PHY also requires the
USB-C mode events to properly set-up the SuperSpeed Lanes functions
to setup USB3-only, USB3 + DP Altmode or DP Altmode only on the 4 lanes.

Update the nb7vpq904m & ptn36502 retimers to get an optional type-c mux
on the next endpoint, and broadcast the received mode to it.

This makes it possible to support 4-lanes DP altmode on Qualcomm platforms.

Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
---
Neil Armstrong (2):
      usb: typec-mux: ptn36502: broadcast typec state to next mux
      usb: typec-mux: nb7vpq904m: broadcast typec state to next mux

 drivers/usb/typec/mux/nb7vpq904m.c | 29 +++++++++++++++++++++++++++--
 drivers/usb/typec/mux/ptn36502.c   | 33 ++++++++++++++++++++++++++++++---
 2 files changed, 57 insertions(+), 5 deletions(-)
---
base-commit: 1613e604df0cd359cf2a7fbd9be7a0bcfacfabd0
change-id: 20240527-topic-sm8x50-upstream-retimer-broadcast-mode-76520768ac3f

Best regards,
-- 
Neil Armstrong <neil.armstrong@...aro.org>