Add documentation for the meson vdec dts node.
Signed-off-by: Maxime Jourdan <maxi.jour...@wanadoo.fr>
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.../bindings/media/amlogic,meson-vdec.txt | 60 +++++++++++++++++++
1 file changed, 60 insertions(+)
create mode 100644
Documentation/devicetree/bindings/media/amlogic,meson-vdec.txt
diff --git a/Documentation/devicetree/bindings/media/amlogic,meson-vdec.txt
b/Documentation/devicetree/bindings/media/amlogic,meson-vdec.txt
new file mode 100644
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+++ b/Documentation/devicetree/bindings/media/amlogic,meson-vdec.txt
@@ -0,0 +1,60 @@
+Amlogic Meson 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,meson-gxbb-vdec"
+ - GXL (S905X, S905D) : "amlogic,meson-gxl-vdec"
+ - GXM (S912) : "amlogic,meson-gxm-vdec"
+- reg: base address and size of he following memory-mapped regions :
+ - dos
+ - esparser
+ - dmc
+- reg-names: should contain the names of the previous memory regions
+- interrupts: should contain the vdec and esparser IRQs.
+- 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@0xd0050000 {
+ compatible = "amlogic,meson-gxbb-vdec";
+ reg = <0x0 0xc8820000 0x0 0x10000
+ 0x0 0xc110a580 0x0 0xe4
+ 0x0 0xc8838000 0x0 0x60>;
+ reg-names = "dos", "esparser", "dmc";
+
+ interrupts = <GIC_SPI 44 IRQ_TYPE_EDGE_RISING
+ GIC_SPI 32 IRQ_TYPE_EDGE_RISING>;
+ interrupt-names = "vdec", "esparser";
+
+ amlogic,ao-sysctrl = <&sysctrl_AO>;
+
+ 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";
+};
--
2.17.1
