[0/4] Add JDI LPM102A188A display panel support

Message

Diogo Ivo Sept. 29, 2022, 5:04 p.m. UTC

Hello!

These patches add support for the JDI LPM102A188A display panel,
found in the Google Pixel C.

Patch 1 adds the DT bindings for the panel.

Patch 2 adds an optional register clear to the Tegra DSI driver.

Patch 3 adds the panel driver, which is based on the downstream
kernel driver published by Google and developed by Sean Paul.

Patch 4 adds the DT node for the Google Pixel C. 

There is one point in this series on which I would like to ask for
some advice:

Since the device's bootloader leaves the display on and in patch 3 I
have assumed that the panel must be reset when probing, I was forced
to add patch 2, discovered by poking at the DSI module's registers until
the panel initialization sequence succeeded. However, if it is okay to
keep the panel on from the bootloader then it would be possible to
forego this second patch. Any comments on this would be highly appreciated.

Thank you!

Diogo Ivo (4):
  dt-bindings: display: Add bindings for JDI LPM102A188A
  drm/tegra: dsi: Clear enable register if powered by bootloader
  drm/panel: Add driver for JDI LPM102A188A
  arm64: dts: smaug: Add display panel node

 .../display/panel/jdi,lpm102a188a.yaml        | 100 ++++
 arch/arm64/boot/dts/nvidia/tegra210-smaug.dts |  72 +++
 drivers/gpu/drm/panel/Kconfig                 |  11 +
 drivers/gpu/drm/panel/Makefile                |   1 +
 drivers/gpu/drm/panel/panel-jdi-lpm102a188a.c | 511 ++++++++++++++++++
 drivers/gpu/drm/tegra/dsi.c                   |  29 +
 6 files changed, 724 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/jdi,lpm102a188a.yaml
 create mode 100644 drivers/gpu/drm/panel/panel-jdi-lpm102a188a.c