linux-kernel - [PATCH v2 2/6] dt-bindings: display: rockchip,inno-hdmi: Document GRF for RK3036 HDMI

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Message-ID: <20250325132944.171111-3-andyshrk@163.com>
Date: Tue, 25 Mar 2025 21:29:36 +0800
From: Andy Yan <andyshrk@....com>
To: heiko@...ech.de
Cc: conor+dt@...nel.org,
	krzk+dt@...nel.org,
	robh@...nel.org,
	hjc@...k-chips.com,
	devicetree@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-rockchip@...ts.infradead.org,
	Andy Yan <andy.yan@...k-chips.com>
Subject: [PATCH v2 2/6] dt-bindings: display: rockchip,inno-hdmi: Document GRF for RK3036 HDMI

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

HDMI on RK3036 use GRF control the HSYNC/VSYNC polarity, but this part
is missing when it first landing upstream.

Document that it is mandatory for RK3036 HDMI.

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

(no changes since v1)

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

diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,inno-hdmi.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,inno-hdmi.yaml
index 9d1e7f894ea54..290376bec079a 100644
--- a/Documentation/devicetree/bindings/display/rockchip/rockchip,inno-hdmi.yaml
+++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,inno-hdmi.yaml
@@ -56,6 +56,12 @@ properties:
       - port@0
       - port@1
 
+  rockchip,grf:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Phandle to GRF used for control the polarity of hsync/vsync of rk3036
+      HDMI.
+
 required:
   - compatible
   - reg
@@ -75,6 +81,8 @@ allOf:
             const: rockchip,rk3036-inno-hdmi
 
     then:
+      required:
+        - rockchip,grf
       properties:
         power-domains: false
 
@@ -103,6 +111,7 @@ examples:
       clock-names = "pclk", "ref";
       pinctrl-names = "default";
       pinctrl-0 = <&hdmi_ctl>;
+      rockchip,grf = <&grf>;
       #sound-dai-cells = <0>;
 
       ports {
-- 
2.43.0