[PATCH 0/2] Backlight fixes for X1-based Surface Pro 11

[Dale Whinham]

The LCD variant of the Surface Pro 11 has had no working backlight
control since the device was added. Its DT took the panel description
from the OLED model, where pmc8380_3 gpio4 is the panel enable line.
On the LCD model, gpio4 enables the backlight instead, and brightness
is a PWM output from the PMK8550 LPG on gpio5. The supply is enabled
by pmc8380_3 gpio10. This is the same arrangement as the ThinkPad T14s
LCD and the Surface Laptop 7.

Patch 1 describes the eDP HPD pinmux (gpio119 -> edp0_hot), which the
Windows ACPI configures for both panel variants. At the moment we rely
on UEFI to set it up.

Patch 2 moves the OLED-specific panel enable and compatible out of the
common dtsi, and adds a pwm-backlight node for the LCD variant.

Tested on the OLED variant by myself and on the LCD variant by Haipeng
Lin.

Signed-off-by: Dale Whinham <daleyo@xxxxxxxxx>
---
Dale Whinham (2):
      arm64: dts: qcom: x1-denali: Add missing pinctrl for eDP HPD
      arm64: dts: qcom: x1-denali: Add PWM backlight for LCD

 arch/arm64/boot/dts/qcom/x1-microsoft-denali.dtsi  |  8 ++--
 .../dts/qcom/x1e80100-microsoft-denali-oled.dts    |  4 ++
 .../boot/dts/qcom/x1p64100-microsoft-denali.dts    | 47 ++++++++++++++++++++++
 3 files changed, 54 insertions(+), 5 deletions(-)
---
base-commit: 24a19b953e2a3d0ea5a8c4951a0ab8f32720c907
change-id: 20261017-sp11-lcd-fixes-5a2666365561

Best regards,
--  
Dale Whinham <daleyo@xxxxxxxxx>