linux-kernel - [PATCH v1] ARM: dts: sun8i: h3: orangepi-pc: Add CMA reserved memory node

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Date:   Wed, 14 Sep 2022 18:11:25 +0300
From:   Dmitry Osipenko <dmitry.osipenko@...labora.com>
To:     Jernej Skrabec <jernej.skrabec@...il.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Samuel Holland <samuel@...lland.org>
Cc:     linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: [PATCH v1] ARM: dts: sun8i: h3: orangepi-pc: Add CMA reserved memory node

Add 256MB CMA node to the Orange Pi PC board. This fixes memory allocation
failures for Cedrus video decoder on trying to play a 1080p video with
gstreamer.

Signed-off-by: Dmitry Osipenko <dmitry.osipenko@...labora.com>
---
 arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts b/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts
index b96e015f54ee..e655346a9fb4 100644
--- a/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts
+++ b/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts
@@ -60,6 +60,20 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};
 
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		linux,cma@...00000 {
+			compatible = "shared-dma-pool";
+			alloc-ranges = <0x40000000 0x40000000>;
+			size = <0x10000000>; /* 256MiB */
+			linux,cma-default;
+			reusable;
+		};
+	};
+
 	connector {
 		compatible = "hdmi-connector";
 		type = "a";
-- 
2.37.3