[PATCH v4 01/10] dt-bindings: display: rockchip: analogix-dp: Allow hclk as third clock

[Damon Ding]

RK3588 eDP controller requires HCLK_VO1 (video output bus clock)
to access the VO1 GRF registers and enable the video datapath.

Previously, the clock was enabled implicitly via the 'rockchip,vo-grf'
phandle reference, which allowed the eDP to work without explicitly
managing the hclk_vo1 clock. However, this is not safe or explicit.

To align with other display controllers (HDMI) on RK3588 and make
the clock requirement explicit, expand clock-names to support either
"grf" (for older SoCs) or "hclk" (for RK3588) as the third clock.

This makes the clock dependency clear and removes reliance on implicit
clock enablement from GRF phandle.

Fixes: f855146263b1 ("dt-bindings: display: rockchip: analogix-dp: Add support for RK3588")
Signed-off-by: Damon Ding <damon.ding at rock-chips.com>

---

Changes in v4:
- Modify the commit msg.
---
 .../bindings/display/rockchip/rockchip,analogix-dp.yaml       | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml
index d99b23b88cc5..d2bc8636b626 100644
--- a/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml
+++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml
@@ -26,7 +26,9 @@ properties:
     items:
       - const: dp
       - const: pclk
-      - const: grf
+      - enum:
+          - grf
+          - hclk
 
   power-domains:
     maxItems: 1
-- 
2.34.1