arm64: qcom: x1e78100-lenovo-thinkpad-t14s: add support for HDMI output
The Thinkpad T14s embeds a transparent 4lanes DP->HDMI transceiver
connected to the third QMP Combo PHY 4 lanes.
The QMP USB3/DP Combo PHY hosts an USB3 phy and a DP PHY on top
of a combo glue to route either lanes to the 4 shared physical lanes.
The routing of the lanes can be:
- 2 DP + 2 USB3
- 4 DP
- 2 USB3
Add the needed property to specify the lanes mapping and
use those in the driver to setup the right PHY mode and
orientation.
Finally Add all the data routing in DT, disable mode switching and specify
the QMP Combo PHY should be in DP-Only mode to route the 4 lanes to
the underlying DP phy.
To: Andrzej Hajda <andrzej.hajda@intel.com>
To: Robert Foss <rfoss@kernel.org>
To: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
To: Jonas Karlman <jonas@kwiboo.se>
To: Jernej Skrabec <jernej.skrabec@gmail.com>
To: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
To: Maxime Ripard <mripard@kernel.org>
To: Thomas Zimmermann <tzimmermann@suse.de>
To: David Airlie <airlied@gmail.com>
To: Simona Vetter <simona@ffwll.ch>
To: Rob Herring <robh@kernel.org>
To: Krzysztof Kozlowski <krzk+dt@kernel.org>
To: Conor Dooley <conor+dt@kernel.org>
To: Vinod Koul <vkoul@kernel.org>
To: Kishon Vijay Abraham I <kishon@kernel.org>
To: Bjorn Andersson <andersson@kernel.org>
To: Konrad Dybcio <konradybcio@kernel.org>
Cc: dri-devel@lists.freedesktop.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-msm@vger.kernel.org
Cc: linux-phy@lists.infradead.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
Changes in v2:
- Model the HDMI transceiver as a simple bridge
- Switch to a static lanes mapping property
- Link to v1: https://lore.kernel.org/r/20250821-topic-x1e80100-hdmi-v1-0-f14ad9430e88@linaro.org
---
Neil Armstrong (5):
dt-bindings: display: bridge: simple: document the Realtek RTD2171 DP-to-HDMI bridge
drm/bridge: simple: add Realtek RTD2171 DP-to-HDMI bridge
dt-bindings: phy: qcom,sc8280xp-qmp-usb43dp-phy: Document static lanes mapping
phy: qcom: qmp-combo: get the static lanes mapping from DT
arm64: dts: qcom: x1e78100-lenovo-thinkpad-t14s: add HDMI nodes
.../bindings/display/bridge/simple-bridge.yaml | 1 +
.../phy/qcom,sc8280xp-qmp-usb43dp-phy.yaml | 29 +++++
.../dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi | 70 ++++++++++++
drivers/gpu/drm/bridge/simple-bridge.c | 5 +
drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 118 +++++++++++++++++++--
5 files changed, 214 insertions(+), 9 deletions(-)
---
base-commit: 7fa4d8dc380fbd81a9d702a855c50690c9c6442c
change-id: 20250821-topic-x1e80100-hdmi-3bd5b5bd2d96
Best regards,