linux-kernel - [PATCH 13/14] arm64: dts: imx8q: add linux,cma node for imx8qm-mek and imx8qxp-mek

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Message-Id: <20250131-8qxp_camera-v1-13-319402ab606a@nxp.com>
Date: Fri, 31 Jan 2025 16:33:58 -0500
From: Frank Li <Frank.Li@....com>
To: Vinod Koul <vkoul@...nel.org>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, 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>, Philipp Zabel <p.zabel@...gutronix.de>, 
 Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Rui Miguel Silva <rmfrfs@...il.com>, Martin Kepplinger <martink@...teo.de>, 
 Purism Kernel Team <kernel@...i.sm>
Cc: linux-phy@...ts.infradead.org, devicetree@...r.kernel.org, 
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, linux-media@...r.kernel.org, 
 "Guoniu.zhou" <guoniu.zhou@....com>, Robby Cai <robby.cai@....com>, 
 Robert Chiras <robert.chiras@....com>, Frank Li <Frank.Li@....com>
Subject: [PATCH 13/14] arm64: dts: imx8q: add linux,cma node for imx8qm-mek
 and imx8qxp-mek

Add linux,cma node because some devices, such as camera, need big continue
physical memory.

Signed-off-by: Frank Li <Frank.Li@....com>
---
 arch/arm64/boot/dts/freescale/imx8qm-mek.dts  | 9 +++++++++
 arch/arm64/boot/dts/freescale/imx8qxp-mek.dts | 8 ++++++++
 2 files changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8qm-mek.dts b/arch/arm64/boot/dts/freescale/imx8qm-mek.dts
index 50fd3370f7dce..61ef00f4259e1 100644
--- a/arch/arm64/boot/dts/freescale/imx8qm-mek.dts
+++ b/arch/arm64/boot/dts/freescale/imx8qm-mek.dts
@@ -113,6 +113,15 @@ dsp_vdev0buffer: memory@...00000 {
 			reg = <0 0x94300000 0 0x100000>;
 			no-map;
 		};
+
+		/* global autoconfigured region for contiguous allocations */
+		linux,cma {
+			compatible = "shared-dma-pool";
+			alloc-ranges = <0 0xc0000000 0 0x3c000000>;
+			size = <0 0x3c000000>;
+			linux,cma-default;
+			reusable;
+		};
 	};
 
 	lvds_backlight0: backlight-lvds0 {
diff --git a/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts b/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts
index be79c793213a5..89c6516c5ba90 100644
--- a/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts
+++ b/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts
@@ -56,6 +56,14 @@ dsp_vdev0buffer: memory@...00000 {
 			reg = <0 0x94300000 0 0x100000>;
 			no-map;
 		};
+
+		linux,cma {
+			compatible = "shared-dma-pool";
+			alloc-ranges = <0 0xc0000000 0 0x3c000000>;
+			size = <0 0x3c000000>;
+			linux,cma-default;
+			reusable;
+		};
 	};
 
 	reg_usdhc2_vmmc: usdhc2-vmmc {

-- 
2.34.1