linux-kernel - [PATCH v3 0/2] typec: add support for the ON Semiconductor nb7vpq904m Type-C Linear Redriver

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Message-Id: <20230601-topic-sm8x50-upstream-redriver-v3-0-988c560e2195@linaro.org>
Date:   Tue, 13 Jun 2023 16:50:06 +0200
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, linux-usb@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Neil Armstrong <neil.armstrong@...aro.org>
Subject: [PATCH v3 0/2] typec: add support for the ON Semiconductor
 nb7vpq904m Type-C Linear Redriver

Add support for the ON Semiconductor NB7VPQ904M Type-C USB SuperSpeed
and DisplayPort ALT Mode Linear Redriver chip found on some devices
with a Type-C port.

The redriver compensates ultra High-Speeed DisplayPort and USB
Super Speed signal integrity losses mainly due to PCB & transmission
cables.

The redriver doesn't support SuperSpeed lines swapping, but
can support Type-C SBU lines swapping.

Support is designed as a Type-C Switch and Retimer, and can propagate
orientation settings to the source endpoint, which is usually
a Super Speed PHY which does the data lanes swapping.

Bindings are added first and can handle the fact data lanes pairs
can be swapped on the PCB.

Compile-time dependencies:
- svid removal at [1]

[1] https://lore.kernel.org/all/20230526131434.46920-1-heikki.krogerus@linux.intel.com/

Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
---
Changes in v3:
- Include bitfield.h
- Use correct -EOPNOTSUPP
- Correct nb7vpq904m_sw_set line wrapping
- Link to v2: https://lore.kernel.org/r/20230601-topic-sm8x50-upstream-redriver-v2-0-dda89b22b1c0@linaro.org

Changes in v2:
- Switch to "retimer" infrastructure
- Slight style fixups after switch to retimer
- Bindings updates (did not keep Reviewed-by tag for those reasons)
 - Update maintainer, was using Bjorn with invalid email
 - Fixed swapped lanes mapping
 - Switched to retimer-switch
 - Fixed i2c top node in example
- Link to v1: https://lore.kernel.org/r/20230601-topic-sm8x50-upstream-redriver-v1-0-6ad21094ff6f@linaro.org

---
Dmitry Baryshkov (1):
      usb: typec: add support for the nb7vpq904m Type-C Linear Redriver

Neil Armstrong (1):
      dt-bindings: usb: add ON Semiconductor nb7vpq904m Type-C Linear Redriver bindings

 .../devicetree/bindings/usb/onnn,nb7vpq904m.yaml   | 141 ++++++
 drivers/usb/typec/mux/Kconfig                      |   8 +
 drivers/usb/typec/mux/Makefile                     |   1 +
 drivers/usb/typec/mux/nb7vpq904m.c                 | 529 +++++++++++++++++++++
 4 files changed, 679 insertions(+)
---
base-commit: ac9a78681b921877518763ba0e89202254349d1b
change-id: 20230601-topic-sm8x50-upstream-redriver-6e261edd5cb4

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