X1/X1 Plus variant of the said device comes in either FHD+ OLED or FHD+
LCD panel, and shares the same model number UX3407QA. It appears LCD
panel's brightness adjustment is PWM backlight controlled, so a
dedicated device-tree is required. Introduce dedicated compatibles with
fallback to 'asus,zenbook-a14-ux3407qa' as they are otherwise the same.

Signed-off-by: Aleksandrs Vinarskis <alex@vinarskis.com>
---
 Documentation/devicetree/bindings/arm/qcom.yaml | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/arm/qcom.yaml b/Documentation/devicetree/bindings/arm/qcom.yaml
index 0110be27c4f6602b25aa4feb742bfe62e4a40d51..06bab89efce6f064882ab6d1f8f441962fe8b7c6 100644
--- a/Documentation/devicetree/bindings/arm/qcom.yaml
+++ b/Documentation/devicetree/bindings/arm/qcom.yaml
@@ -1074,7 +1074,13 @@ properties:
 
       - items:
           - enum:
-              - asus,zenbook-a14-ux3407qa
+              - asus,zenbook-a14-ux3407qa-lcd
+              - asus,zenbook-a14-ux3407qa-oled
+          - const: asus,zenbook-a14-ux3407qa
+          - const: qcom,x1p42100
+
+      - items:
+          - enum:
               - lenovo,thinkbook-16
               - qcom,x1p42100-crd
           - const: qcom,x1p42100

-- 
2.48.1

On Mon, Sep 08, 2025 at 08:45:45PM +0200, Aleksandrs Vinarskis wrote:
> X1/X1 Plus variant of the said device comes in either FHD+ OLED or FHD+
> LCD panel, and shares the same model number UX3407QA. It appears LCD
> panel's brightness adjustment is PWM backlight controlled, so a
> dedicated device-tree is required. Introduce dedicated compatibles with
> fallback to 'asus,zenbook-a14-ux3407qa' as they are otherwise the same.
> 
> Signed-off-by: Aleksandrs Vinarskis <alex@vinarskis.com>
> ---
>  Documentation/devicetree/bindings/arm/qcom.yaml | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof