linux-kernel - [PATCH v2] dt-bindings: media: Add sram-size Property for Wave5

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Date: Thu, 1 Feb 2024 12:42:38 -0600
From: Brandon Brnich <b-brnich@...com>
To: Nas Chung <nas.chung@...psnmedia.com>,
        Jackson Lee
	<jackson.lee@...psnmedia.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, <linux-media@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Nishanth Menon <nm@...com>, Vignesh
 Raghavendra <vigneshr@...com>
CC: Darren Etheridge <detheridge@...com>, Brandon Brnich <b-brnich@...com>
Subject: [PATCH v2] dt-bindings: media: Add sram-size Property for Wave5

Wave521c has capability to use SRAM carveout to store reference data with
purpose of reducing memory bandwidth. To properly use this pool, the driver
expects to have an sram and sram-size node. Without sram-size node, driver
will default value to zero, making sram node irrelevant.

Signed-off-by: Brandon Brnich <b-brnich@...com>
---
 Documentation/devicetree/bindings/media/cnm,wave521c.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/cnm,wave521c.yaml b/Documentation/devicetree/bindings/media/cnm,wave521c.yaml
index 6a11c1d11fb5..ea5469eb38f9 100644
--- a/Documentation/devicetree/bindings/media/cnm,wave521c.yaml
+++ b/Documentation/devicetree/bindings/media/cnm,wave521c.yaml
@@ -43,6 +43,12 @@ properties:
       storing it on DMA memory. It is mainly used for the purpose of reducing
       bandwidth.
 
+  sram-size:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      SRAM size reserved for VPU operations. If not specified, size will default
+      to zero.
+
 required:
   - compatible
   - reg
@@ -58,4 +64,5 @@ examples:
         clocks = <&clks 42>;
         interrupts = <42>;
         sram = <&sram>;
+        sram-size = <0x1234>;
     };
-- 
2.34.1