[PATCH v3 0/2] Add support for OLED panel used on Snapdragon Lenovo T14s Gen6

[Christopher Obbard <christopher.obbard@linaro.org>]

The Snapdragon Lenovo T14s Gen6 can be bought with a number of different
panels. This patch series adds support for the OLED model which has a
Samsung ATNA40YK20 panel.

With this patch series, the backlight of the OLED eDP panel does not
illuminate since the brightness is incorrectly read from the eDP panel
as 0 (to be clear this is not a regression). This will be fixed in a
follow-up patch series as it does not block the device tree patches.

Signed-off-by: Christopher Obbard <christopher.obbard@linaro.org>
---
Changes in v3:
- Added review trailers from v2.
- Dropped dt-binding documentation patch (applied by Douglas Anderson into
  drm-misc-next).
- Dropped eDP maximum brightness patch (will be sent in separate
  series).
- Removed duplicate nodes in T14s OLED device tree.
- Reworked WIP comments from commit messages.
- Link to v2: https://lore.kernel.org/r/20250325-wip-obbardc-qcom-t14s-oled-panel-v2-0-e9bc7c9d30cc@linaro.org

Changes in v2:
- Use the existing atna33xc20 driver rather than panel-edp.
- Add eDP panel into OLED devicetree.
- Add patch to read the correct maximum brightness from the eDP panel.
- Link to v1: https://lore.kernel.org/r/20250320-wip-obbardc-qcom-t14s-oled-panel-v1-1-05bc4bdcd82a@linaro.org

---
Christopher Obbard (2):
      arm64: dts: qcom: x1e78100-t14s: add hpd gpio to eDP panel
      arm64: dts: qcom: x1e78100-t14s-oled: add eDP panel

 .../boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s-oled.dts      |  8 ++++++++
 arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi   | 11 +++++++++++
 2 files changed, 19 insertions(+)
---
base-commit: b6ae34803e82511009e2b78dc4fd154330ecdc2d
change-id: 20250320-wip-obbardc-qcom-t14s-oled-panel-b74fed21d600

Best regards,
-- 
Christopher Obbard <christopher.obbard@linaro.org>