[PATCH 1/2] dt-bindings: display: rockchip,inno-hdmi: Fix ref clk Document of RK3036 compatible

[PATCH 1/2] dt-bindings: display: rockchip,inno-hdmi: Fix ref clk Document of RK3036 compatible

[Andy Yan]

From: Andy Yan <andy.yan@rock-chips.com>

The RK3036 HDMI DDC bus requires it's PHY's reference clock to be enabled
first before normal DDC communication can be carried out.

Therefore, both RK3036 and RK3128 HDMI require two identical clocks.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
---

 .../bindings/display/rockchip/rockchip,inno-hdmi.yaml | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,inno-hdmi.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,inno-hdmi.yaml
index 5b87b0f1963e1..9d1e7f894ea54 100644
--- a/Documentation/devicetree/bindings/display/rockchip/rockchip,inno-hdmi.yaml
+++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,inno-hdmi.yaml
@@ -23,13 +23,11 @@ properties:
     maxItems: 1
 
   clocks:
-    minItems: 1
     items:
       - description: The HDMI controller main clock
       - description: The HDMI PHY reference clock
 
   clock-names:
-    minItems: 1
     items:
       - const: pclk
       - const: ref
@@ -87,11 +85,6 @@ allOf:
             const: rockchip,rk3128-inno-hdmi
 
     then:
-      properties:
-        clocks:
-          minItems: 2
-        clock-names:
-          minItems: 2
       required:
         - power-domains
 
@@ -106,8 +99,8 @@ examples:
       compatible = "rockchip,rk3036-inno-hdmi";
       reg = <0x20034000 0x4000>;
       interrupts = <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
-      clocks = <&cru  PCLK_HDMI>;
-      clock-names = "pclk";
+      clocks = <&cru PCLK_HDMI>, <&cru SCLK_LCDC>;
+      clock-names = "pclk", "ref";
       pinctrl-names = "default";
       pinctrl-0 = <&hdmi_ctl>;
       #sound-dai-cells = <0>;
-- 
2.43.0

[PATCH 2/2] ARM: dts: rockchip: Add ref clk for hdmi

[Andy Yan]

From: Andy Yan <andy.yan@rock-chips.com>

The RK3036 HDMI DDC bus requires it's PHY's reference clock to be
enabled first before normal DDC communication can be carried out.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
---

 arch/arm/boot/dts/rockchip/rk3036.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/rockchip/rk3036.dtsi b/arch/arm/boot/dts/rockchip/rk3036.dtsi
index 6039a0908af1c..22685cd23a708 100644
--- a/arch/arm/boot/dts/rockchip/rk3036.dtsi
+++ b/arch/arm/boot/dts/rockchip/rk3036.dtsi
@@ -403,8 +403,8 @@ hdmi: hdmi@20034000 {
 		compatible = "rockchip,rk3036-inno-hdmi";
 		reg = <0x20034000 0x4000>;
 		interrupts = <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&cru  PCLK_HDMI>;
-		clock-names = "pclk";
+		clocks = <&cru PCLK_HDMI>, <&cru SCLK_LCDC>;
+		clock-names = "pclk", "ref";
 		pinctrl-names = "default";
 		pinctrl-0 = <&hdmi_ctl>;
 		#sound-dai-cells = <0>;
-- 
2.43.0

Re: [PATCH 1/2] dt-bindings: display: rockchip,inno-hdmi: Fix ref clk Document of RK3036 compatible

[Rob Herring (Arm)]

On Mon, 24 Mar 2025 18:33:27 +0800, Andy Yan wrote:
> From: Andy Yan <andy.yan@rock-chips.com>
> 
> The RK3036 HDMI DDC bus requires it's PHY's reference clock to be enabled
> first before normal DDC communication can be carried out.
> 
> Therefore, both RK3036 and RK3128 HDMI require two identical clocks.
> 
> Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
> ---
> 
>  .../bindings/display/rockchip/rockchip,inno-hdmi.yaml | 11 ++---------
>  1 file changed, 2 insertions(+), 9 deletions(-)
> 

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>