linux-kernel - [PATCH v11 5/5] dt-bindings: media: Document bindings for venus firmware device

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Date:   Mon,  8 Oct 2018 19:02:52 +0530
From:   Vikash Garodia <vgarodia@...eaurora.org>
To:     stanimir.varbanov@...aro.org, hverkuil@...all.nl,
        mchehab@...nel.org
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, acourbot@...omium.org,
        vgarodia@...eaurora.org
Subject: [PATCH v11 5/5] dt-bindings: media: Document bindings for venus firmware device

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

Signed-off-by: Vikash Garodia <vgarodia@...eaurora.org>
Reviewed-by: Rob Herring <robh@...nel.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@...0000 {
 		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>;
+		};
 	};
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project