linux-kernel - [PATCH 0/2] phy: Add support for the HDMI TX PHY on Meson8/8b/8m2

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Date:   Fri,  4 Jun 2021 21:03:36 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     robh+dt@...nel.org, linux-phy@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-amlogic@...ts.infradead.org
Cc:     kishon@...com, vkoul@...nel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [PATCH 0/2] phy: Add support for the HDMI TX PHY on Meson8/8b/8m2

Amlogic Meson8/8b/8m2 SoCs embed a HDMI TX PHY. Unfortunately there is
no (public) documentation for this hardware. The best thing we have is
the 3.10 vendor kernel, which unfortunately doesn't document most
register bits (only a few are named there, the rest is all magic
numbers).
It is possible that this is a TranSwitch HDMI TX PHY based core, but
this is pure speculation.

Adding a driver for the HDMI TX PHY gets us one step closer to video
output on these older SoCs.

Martin Blumenstingl (2):
  dt-bindings: phy: Add the Amlogic Meson8 HDMI TX PHY bindings
  phy: amlogic: Add a new driver for the HDMI TX PHY on Meson8/8b/8m2

 .../phy/amlogic,meson8-hdmi-tx-phy.yaml       |  51 ++++++
 drivers/phy/amlogic/Kconfig                   |  11 ++
 drivers/phy/amlogic/Makefile                  |   1 +
 drivers/phy/amlogic/phy-meson8-hdmi-tx.c      | 150 ++++++++++++++++++
 4 files changed, 213 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/amlogic,meson8-hdmi-tx-phy.yaml
 create mode 100644 drivers/phy/amlogic/phy-meson8-hdmi-tx.c

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2.31.1