linux-kernel - [PATCH RFC v2 1/3] media: dt-bindings: Add Amlogic V4L2 video decoder

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Message-Id: <20251124-b4-s4-vdec-upstream-v2-1-bdbbce3f11a6@amlogic.com>
Date: Mon, 24 Nov 2025 11:32:17 +0800
From: Zhentao Guo via B4 Relay <devnull+zhentao.guo.amlogic.com@...nel.org>
To: Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Neil Armstrong <neil.armstrong@...aro.org>, 
 Kevin Hilman <khilman@...libre.com>, Jerome Brunet <jbrunet@...libre.com>, 
 Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-amlogic@...ts.infradead.org, Zhentao Guo <zhentao.guo@...ogic.com>
Subject: [PATCH RFC v2 1/3] media: dt-bindings: Add Amlogic V4L2 video
 decoder

From: Zhentao Guo <zhentao.guo@...ogic.com>

Describe the initial support for the V4L2 stateless video decoder
driver used with the Amlogic S4 (S805X2) platform.

Signed-off-by: Zhentao Guo <zhentao.guo@...ogic.com>
---
 .../bindings/media/amlogic,s4-vcodec-dec.yaml      | 87 ++++++++++++++++++++++
 1 file changed, 87 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/amlogic,s4-vcodec-dec.yaml b/Documentation/devicetree/bindings/media/amlogic,s4-vcodec-dec.yaml
new file mode 100644
index 000000000000..401a5a32902e
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/amlogic,s4-vcodec-dec.yaml
@@ -0,0 +1,87 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2025 Amlogic, Inc. All rights reserved
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/amlogic,vcodec-dec.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Amlogic Video Decode Accelerator
+
+maintainers:
+  - Zhentao Guo <zhentao.guo@...ogic.com>
+
+description:
+  The Video Decoder Accelerator present on Amlogic SOCs.
+  It supports stateless h264 decoding.
+
+properties:
+  compatible:
+    const: amlogic,s4-vcodec-dec
+
+  reg:
+    maxItems: 2
+
+  reg-names:
+    items:
+      - const: dos
+      - const: dmc
+
+  interrupts:
+    maxItems: 3
+
+  clocks:
+    maxItems: 3
+
+  clock-names:
+    items:
+      - const: vdec
+      - const: clk_vdec_mux
+      - const: clk_hevcf_mux
+
+  power-domains:
+    maxItems: 2
+
+  power-domain-names:
+    items:
+      - const: vdec
+      - const: hevc
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - interrupts
+  - clocks
+  - clock-names
+  - power-domains
+  - power-domain-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/amlogic,s4-pll-clkc.h>
+    #include <dt-bindings/clock/amlogic,s4-peripherals-clkc.h>
+    #include <dt-bindings/power/meson-s4-power.h>
+    video-codec@...20000 {
+      compatible = "amlogic,s4-vcodec-dec";
+      reg = <0xfe320000 0x10000>,
+            <0xfe036000 0x20>;
+      amlogic,canvas = <&canvas>;
+      reg-names = "dos",
+                  "dmc";
+      interrupts = <GIC_SPI 91 IRQ_TYPE_EDGE_RISING>,
+                   <GIC_SPI 92 IRQ_TYPE_EDGE_RISING>,
+                   <GIC_SPI 93 IRQ_TYPE_EDGE_RISING>;
+      clocks = <&clkc_periphs CLKID_DOS>,
+               <&clkc_periphs CLKID_VDEC_SEL>,
+               <&clkc_periphs CLKID_HEVCF_SEL>;
+      clock-names = "vdec",
+                    "clk_vdec_mux",
+                    "clk_hevcf_mux";
+      power-domains = <&pwrc PWRC_S4_DOS_VDEC_ID>,
+                      <&pwrc PWRC_S4_DOS_HEVC_ID>;
+      power-domain-names = "vdec",
+                           "hevc";
+    };

-- 
2.42.0