linux-kernel - [PATCH v2 1/4] dt-bindings: mailbox: Add mediatek,gce-props.yaml

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Date: Wed, 10 Jan 2024 14:35:29 +0800
From: Jason-JH.Lin <jason-jh.lin@...iatek.com>
To: Jassi Brar <jassisinghbrar@...il.com>, Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley
	<conor+dt@...nel.org>, Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Chun-Kuang Hu <chunkuang.hu@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-media@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-mediatek@...ts.infradead.org>, Jason-ch Chen
	<jason-ch.chen@...iatek.com>, Johnson Wang <johnson.wang@...iatek.com>,
	"Jason-JH . Lin" <jason-jh.lin@...iatek.com>, Singo Chang
	<singo.chang@...iatek.com>, Nancy Lin <nancy.lin@...iatek.com>, Shawn Sung
	<shawn.sung@...iatek.com>,
	<Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH v2 1/4] dt-bindings: mailbox: Add mediatek,gce-props.yaml

Add mediatek,gce-props.yaml for specific GCE properties for both
Mailbox Providers and Consumers.

Signed-off-by: Jason-JH.Lin <jason-jh.lin@...iatek.com>
---
 .../bindings/mailbox/mediatek,gce-props.yaml  | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mailbox/mediatek,gce-props.yaml

diff --git a/Documentation/devicetree/bindings/mailbox/mediatek,gce-props.yaml b/Documentation/devicetree/bindings/mailbox/mediatek,gce-props.yaml
new file mode 100644
index 000000000000..aac776b74e88
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/mediatek,gce-props.yaml
@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mailbox/mediatek,gce-props.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek Global Command Engine common propertes for both Mailbox Providers and Consumers.
+
+maintainers:
+  - Houlong Wei <houlong.wei@...iatek.com>
+
+description:
+  The Global Command Engine (GCE) is used to implement a Command Queue (CMDQ)
+  driver using the Linux Mailbox framework. The GCE is an instruction based,
+  multi-threaded, single-core command dispatcher for MediaTek hardware.
+  We use GCE Mailbox binding to define GCE core properties for GCE Mailbox Provider.
+  A device that uses the CMDQ driver to confige its hardware registers by requesting
+  the Linux Mailbox Channels in the GCE Mailbox Controller is a Mailbox Consumer.
+  This binding defines the common GCE properties for both Mailbox Providers and Consumers.
+
+properties:
+  mediatek,gce-events:
+    description:
+      Each gce-events is an event id corresponding to a specific hardware event
+      signal sent to GCE. The event id is defined in the GCE header
+      include/dt-bindings/gce/<chip>-gce.h of each chips.
+      CMDQ client drivers have two usage of GCE event signals,
+      one is sfotware tokens and the other is hardware events.
+      Software tokens refer to GCE event signals triggered by drivers.
+      e.g. software drivers append GCE commands to set a GCE event after specific
+      GCE commands. Or CMDQ client driver uses the CPU to write the event id
+      into GCE register to trigger the GCE event corresponding to the event id.
+      Hardware events refer to GCE event signals triggered by hardware engines.
+      e.g. When OVL fetches all the data in the frame buffer, OVL will send
+      a frame done irq and send a frame done GCE event via hardware bus directly
+      at the same time.
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 1
+    maxItems: 1024
+
+additionalProperties: true
-- 
2.18.0