linux-kernel - [PATCH v2 2/2] Add dp PHY dt-bindings

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Date: Fri, 10 May 2024 19:04:15 +0800
From: Liankun Yang <liankun.yang@...iatek.com>
To: <chunkuang.hu@...nel.org>, <p.zabel@...gutronix.de>, <airlied@...il.com>,
	<daniel@...ll.ch>, <maarten.lankhorst@...ux.intel.com>, <mripard@...nel.org>,
	<tzimmermann@...e.de>, <robh+dt@...nel.org>,
	<krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
	<chunfeng.yun@...iatek.com>, <vkoul@...nel.org>, <kishon@...nel.org>,
	<matthias.bgg@...il.com>, <angelogioacchino.delregno@...labora.com>,
	<jitao.shi@...iatek.com>, <mac.shen@...iatek.com>,
	<liankun.yang@...iatek.com>,
	<Project_Global_Chrome_Upstream_Group@...iatek.com>
CC: <dri-devel@...ts.freedesktop.org>, <linux-mediatek@...ts.infradead.org>,
	<devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linux-phy@...ts.infradead.org>
Subject: [PATCH v2 2/2] Add dp PHY dt-bindings

Add dp PHY dt-bindings.

Changeds in v2:
- Add dp PHY dt-bindings.
https://patchwork.kernel.org/project/linux-mediatek/patch/
20240403040517.3279-1-liankun.yang@...iatek.com/

Signed-off-by: Liankun Yang <liankun.yang@...iatek.com>
---
 .../display/mediatek/mediatek.phy-dp.yaml     | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/mediatek/mediatek.phy-dp.yaml

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek.phy-dp.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek.phy-dp.yaml
index 000000000000..476bc329363f
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek.phy-dp.yaml
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/mediatek/mediatek,phy-dp.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek Display Port Controller
+
+maintainers:
+  - Mac shen <mac.shen@...iatek.com>
+  - Liankun yang <Liankun.yang@...iatek.com>
+
+description: |
+  Special settings need to be configured by MediaTek DP based on the actual
+  hardware situation. For example, when using a certain brand's docking
+  station for display projection, garbage may appear. Adjusting the specific
+  ssc value can resolve this issue.
+
+properties:
+  status: disabled
+    description: |
+      Since the DP driver has already registered the DP PHY device
+      through mtk_dp_register_phy(), so the status is disabled.
+
+  dp-ssc-setting:
+    - ssc-delta-hbr
+    description: Specific values are set based on the actual HW situation.
+
+required:
+  - status
+  - dp-ssc-setting
+
+examples:
+  - |
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        phy-dp@...00000 {
+          status = "disabled";
+          dp-ssc-setting {
+            ssc-delta-hbr = <0x01fe>;
+          }
+        };
+    };
-- 
2.18.0