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[media] doc: DT: venus: binding document for Qualcomm video driver

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Add binding document for Venus video encoder/decoder driver

Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Stanimir Varbanov 2017-06-15 13:31:43 -03:00 committed by Mauro Carvalho Chehab
parent d498756451
commit 2f7c8e0e36
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Documentation/devicetree/bindings/media/qcom,venus.txt Normal file
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* Qualcomm Venus video encoder/decoder accelerators
- compatible:
Usage: required
Value type: <stringlist>
Definition: Value should contain one of:
- "qcom,msm8916-venus"
- "qcom,msm8996-venus"
- reg:
Usage: required
Value type: <prop-encoded-array>
Definition: Register base address and length of the register map.
- interrupts:
Usage: required
Value type: <prop-encoded-array>
Definition: Should contain interrupt line number.
- clocks:
Usage: required
Value type: <prop-encoded-array>
Definition: A List of phandle and clock specifier pairs as listed
in clock-names property.
- clock-names:
Usage: required for msm8916
Value type: <stringlist>
Definition: Should contain the following entries:
- "core" Core video accelerator clock
- "iface" Video accelerator AHB clock
- "bus" Video accelerator AXI clock
- clock-names:
Usage: required for msm8996
Value type: <stringlist>
Definition: Should contain the following entries:
- "core" Core video accelerator clock
- "iface" Video accelerator AHB clock
- "bus" Video accelerator AXI clock
- "mbus" Video MAXI clock
- power-domains:
Usage: required
Value type: <prop-encoded-array>
Definition: A phandle and power domain specifier pairs to the
power domain which is responsible for collapsing
and restoring power to the peripheral.
- iommus:
Usage: required
Value type: <prop-encoded-array>
Definition: A list of phandle and IOMMU specifier pairs.
- memory-region:
Usage: required
Value type: <phandle>
Definition: reference to the reserved-memory for the firmware
memory region.
* Subnodes
The Venus video-codec node must contain two subnodes representing
video-decoder and video-encoder.
Every of video-encoder or video-decoder subnode should have:
- compatible:
Usage: required
Value type: <stringlist>
Definition: Value should contain "venus-decoder" or "venus-encoder"
- clocks:
Usage: required for msm8996
Value type: <prop-encoded-array>
Definition: A List of phandle and clock specifier pairs as listed
in clock-names property.
- clock-names:
Usage: required for msm8996
Value type: <stringlist>
Definition: Should contain the following entries:
- "core" Subcore video accelerator clock
- power-domains:
Usage: required for msm8996
Value type: <prop-encoded-array>
Definition: A phandle and power domain specifier pairs to the
power domain which is responsible for collapsing
and restoring power to the subcore.
* An Example
video-codec@1d00000 {
compatible = "qcom,msm8916-venus";
reg = <0x01d00000 0xff000>;
interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&gcc GCC_VENUS0_VCODEC0_CLK>,
<&gcc GCC_VENUS0_AHB_CLK>,
<&gcc GCC_VENUS0_AXI_CLK>;
clock-names = "core", "iface", "bus";
power-domains = <&gcc VENUS_GDSC>;
iommus = <&apps_iommu 5>;
memory-region = <&venus_mem>;
video-decoder {
compatible = "venus-decoder";
clocks = <&mmcc VIDEO_SUBCORE0_CLK>;
clock-names = "core";
power-domains = <&mmcc VENUS_CORE0_GDSC>;
};
video-encoder {
compatible = "venus-encoder";
clocks = <&mmcc VIDEO_SUBCORE1_CLK>;
clock-names = "core";
power-domains = <&mmcc VENUS_CORE1_GDSC>;
};
};