linux-kernel - [PATCH 1/1] ARM: dts: imx6qdl: Add reserved memory area for CMA memory

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Message-Id: <20240827142458.265558-1-alexander.stein@ew.tq-group.com>
Date: Tue, 27 Aug 2024 16:24:58 +0200
From: Alexander Stein <alexander.stein@...tq-group.com>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>
Cc: Alexander Stein <alexander.stein@...tq-group.com>,
	linux@...tq-group.com,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/1] ARM: dts: imx6qdl: Add reserved memory area for CMA memory

Default CMA size is too small for HDMI output and VPU usage. Increase the
default size by providing a CMA memory area.

Signed-off-by: Alexander Stein <alexander.stein@...tq-group.com>
---
Smallest RAM variant has 512MiB.

 arch/arm/boot/dts/nxp/imx/imx6qdl-mba6.dtsi | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm/boot/dts/nxp/imx/imx6qdl-mba6.dtsi b/arch/arm/boot/dts/nxp/imx/imx6qdl-mba6.dtsi
index d03f7065ddfd7..8ba3ec27bee07 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6qdl-mba6.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx6qdl-mba6.dtsi
@@ -106,6 +106,20 @@ reg_vcc3v3_audio: regulator-vcc3v3-audio {
 		vin-supply = <&reg_mba6_3p3v>;
 	};
 
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		linux,cma {
+			compatible = "shared-dma-pool";
+			reusable;
+			size = <0x14000000>;
+			alloc-ranges = <0x10000000 0x20000000>;
+			linux,cma-default;
+		};
+	};
+
 	sound {
 		compatible = "fsl,imx-audio-tlv320aic32x4";
 		pinctrl-names = "default";
-- 
2.34.1