linux-kernel - [PATCH v2 0/2] Support for Synaptics TDDI series panels

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Message-Id: <20250625-panel-synaptics-tddi-v2-0-7a62ab1d13c7@disroot.org>
Date: Wed, 25 Jun 2025 15:38:43 +0530
From: Kaustabh Chakraborty <kauschluss@...root.org>
To: Neil Armstrong <neil.armstrong@...aro.org>, 
 Jessica Zhang <quic_jesszhan@...cinc.com>, David Airlie <airlied@...il.com>, 
 Simona Vetter <simona@...ll.ch>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Jessica Zhang <jessica.zhang@....qualcomm.com>
Cc: dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Kaustabh Chakraborty <kauschluss@...root.org>
Subject: [PATCH v2 0/2] Support for Synaptics TDDI series panels

Synaptics' Touch and Display Driver Integration (TDDI) technology [1]
employs a single chip for both touchscreen and display capabilities.
Such designs reportedly help reducing costs and power consumption.

Although the touchscreens, which are powered by Synaptics'
Register-Mapped Interface 4 (RMI4) touch protocol via I2C or SPI have
driver support in the kernel, the MIPI DSI display panels don't.

This series introduces a rudimentary driver for controlling said display
panels, which supports TD4101 and TD4300 panels.

[1] https://www.synaptics.com/technology/display-integration

Signed-off-by: Kaustabh Chakraborty <kauschluss@...root.org>
---
Changes in v2:
- fixed various dt_binding_check errors (conor)
- did s/tddi_update_brightness/tddi_update_status
- added check for panel enable in tddi_update_status()
- used backlight_get_brightness() in appropriate places
- Link to v1: https://lore.kernel.org/r/20250612-panel-synaptics-tddi-v1-0-dfb8a425f76c@disroot.org

---
Kaustabh Chakraborty (2):
      dt-bindings: display: panel: document Synaptics TDDI panel driver
      drm: panel: add support for Synaptics TDDI series DSI panels

 .../display/panel/synaptics,td4300-panel.yaml      |  89 +++++++
 drivers/gpu/drm/panel/Kconfig                      |  11 +
 drivers/gpu/drm/panel/Makefile                     |   1 +
 drivers/gpu/drm/panel/panel-synaptics-tddi.c       | 288 +++++++++++++++++++++
 4 files changed, 389 insertions(+)
---
base-commit: 1b152eeca84a02bdb648f16b82ef3394007a9dcf
change-id: 20250523-panel-synaptics-tddi-0b0b3f07f814

Best regards,
-- 
Kaustabh Chakraborty <kauschluss@...root.org>