linux-kernel - [PATCH] arm64: dts: ti: k3-am625-beagleplay: Reserve 128MiB of global CMA

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Message-ID: <20250131173508.1338842-1-nm@ti.com>
Date: Fri, 31 Jan 2025 11:35:08 -0600
From: Nishanth Menon <nm@...com>
To: Conor Dooley <conor+dt@...nel.org>,
        Krzysztof Kozlowski
	<krzk+dt@...nel.org>,
        Rob Herring <robh@...nel.org>, Vignesh Raghavendra
	<vigneshr@...com>
CC: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Tero Kristo <kristo@...nel.org>, Nishanth Menon <nm@...com>
Subject: [PATCH] arm64: dts: ti: k3-am625-beagleplay: Reserve 128MiB of global CMA

In the same lines of commit 9e8560556f9c ("arm64: dts: ti:
k3-am62x-sk-common: Reserve 128MiB of global CMA"), reserve global CMA
pool for:

LCD Display: 16MiB, HDMI (1080p): 16MiB, GPU: 16MiB, CSI2 1 1080p
sensor: 32MiB with a 32MiB set for other peripherals and a 16MiB
buffer.

Signed-off-by: Nishanth Menon <nm@...com>
---
 arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts b/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts
index 75c80290b12a..a5469f2712f0 100644
--- a/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts
+++ b/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts
@@ -65,6 +65,14 @@ ramoops: ramoops@...00000 {
 			pmsg-size = <0x8000>;
 		};
 
+		/* global cma region */
+		linux,cma {
+			compatible = "shared-dma-pool";
+			reusable;
+			size = <0x00 0x8000000>;
+			linux,cma-default;
+		};
+
 		secure_tfa_ddr: tfa@...80000 {
 			reg = <0x00 0x9e780000 0x00 0x80000>;
 			no-map;
-- 
2.47.0