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From:   Maxime Jourdan <mjourdan@baylibre.com>
To:     Kevin Hilman <khilman@baylibre.com>,
        Rob Herring <robh+dt@kernel.org>
Cc:     Maxime Jourdan <mjourdan@baylibre.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Hans Verkuil <hans.verkuil@cisco.com>,
        Jerome Brunet <jbrunet@baylibre.com>,
        Neil Armstrong <narmstrong@baylibre.com>,
        Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
        linux-media@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-amlogic@lists.infradead.org
Subject: [PATCH 1/4] dt-bindings: media: add Amlogic Video Decoder Bindings
Date:   Fri, 31 Aug 2018 10:52:02 +0200
Message-Id: <20180831085205.14760-2-mjourdan@baylibre.com>
In-Reply-To: <20180831085205.14760-1-mjourdan@baylibre.com>
References: <20180831085205.14760-1-mjourdan@baylibre.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Add documentation for the meson vdec dts node.

Signed-off-by: Maxime Jourdan <mjourdan@baylibre.com>
---
 .../bindings/media/amlogic,vdec.txt           | 63 +++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/amlogic,vdec.txt

diff --git a/Documentation/devicetree/bindings/media/amlogic,vdec.txt b/Documentation/devicetree/bindings/media/amlogic,vdec.txt
new file mode 100644
index 000000000000..c6450f2e7f28
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/amlogic,vdec.txt
@@ -0,0 +1,63 @@
+Amlogic Video Decoder
+================================
+
+The VDEC IP is composed of the following blocks :
+
+- ESPARSER is a bitstream parser that outputs to a VIFIFO. Further VDEC blocks
+then feed from this VIFIFO.
+- VDEC_1 can decode MPEG-1, MPEG-2, MPEG-4 part 2, H.263, H.264.
+- VDEC_2 is used as a helper for corner cases like H.264 4K on older SoCs.
+It is not handled by this driver.
+- VDEC_HCODEC is the H.264 encoding block. It is not handled by this driver.
+- VDEC_HEVC can decode HEVC and VP9.
+
+Device Tree Bindings:
+---------------------
+
+VDEC: Video Decoder
+--------------------------
+
+Required properties:
+- compatible: value should be different for each SoC family as :
+	- GXBB (S905) : "amlogic,gxbb-vdec"
+	- GXL (S905X, S905D) : "amlogic,gxl-vdec"
+	- GXM (S912) : "amlogic,gxm-vdec"
+- reg: base address and size of he following memory-mapped regions :
+	- dos
+	- esparser
+- reg-names: should contain the names of the previous memory regions
+- interrupts: should contain the vdec and esparser IRQs.
+- amlogic,ao-sysctrl: should point to the AOBUS sysctrl node
+- amlogic,canvas: should point to a canvas provider node
+- clocks: should contain the following clocks :
+	- dos_parser
+	- dos
+	- vdec_1
+	- vdec_hevc
+- clock-names: should contain the names of the previous clocks
+- resets: should contain the parser reset.
+- reset-names: should be "esparser".
+
+Example:
+
+vdec: video-decoder@c8820000 {
+	compatible = "amlogic,gxbb-vdec";
+	reg = <0x0 0xc8820000 0x0 0x10000>,
+	      <0x0 0xc110a580 0x0 0xe4>;
+	reg-names = "dos", "esparser";
+
+	interrupts = <GIC_SPI 44 IRQ_TYPE_EDGE_RISING>,
+		     <GIC_SPI 32 IRQ_TYPE_EDGE_RISING>;
+
+	amlogic,ao-sysctrl = <&sysctrl_AO>;
+	amlogic,canvas = <&canvas>;
+
+	clocks = <&clkc CLKID_DOS_PARSER>,
+		 <&clkc CLKID_DOS>,
+		 <&clkc CLKID_VDEC_1>,
+		 <&clkc CLKID_VDEC_HEVC>;
+	clock-names = "dos_parser", "dos", "vdec_1", "vdec_hevc";
+
+	resets = <&reset RESET_PARSER>;
+	reset-names = "esparser";
+};
-- 
2.18.0