[PATCH v12 5/5] dt-bindings: media: Document bindings for venus firmware device

Vikash Garodia
2018-10-17T13:18:23Z

Add devicetree binding documentation for firmware loader for video
hardware running on qualcomm chip.

Signed-off-by: Vikash Garodia <vgarodia@codeaurora.org>
Reviewed-by: Rob Herring <robh@kernel.org>
---
Documentation/devicetree/bindings/media/qcom,venus.txt | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/media/qcom,venus.txt b/Documentation/devicetree/bindings/media/qcom,venus.txt
index 00d0d1b..b602c4c 100644
--- a/Documentation/devicetree/bindings/media/qcom,venus.txt
+++ b/Documentation/devicetree/bindings/media/qcom,venus.txt
@@ -53,7 +53,8 @@

* Subnodes
The Venus video-codec node must contain two subnodes representing
-video-decoder and video-encoder.
+video-decoder and video-encoder, and one optional firmware subnode.
+Firmware subnode is needed when the platform does not have TrustZone.

Every of video-encoder or video-decoder subnode should have:

@@ -79,6 +80,13 @@ Every of video-encoder or video-decoder subnode should have:
power domain which is responsible for collapsing
and restoring power to the subcore.

+The firmware subnode must have:
+
+- iommus:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: A list of phandle and IOMMU specifier pairs.
+
* An Example
video-codec@1d00000 {
compatible = "qcom,msm8916-venus";
@@ -105,4 +113,8 @@ Every of video-encoder or video-decoder subnode should have:
clock-names = "core";
power-domains = <&mmcc VENUS_CORE1_GDSC>;
};
+
+ video-firmware {
+ iommus = <&apps_iommu 0x10b2 0x0>;
+ };
};