From 4a2d3d2a7dfb6479e6bbcbaaa8524dc5e66beb1c Mon Sep 17 00:00:00 2001
From: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
Date: Thu, 6 Apr 2023 16:15:31 +0200
Subject: [PATCH] ARM: dts: stm32: define a 128MB CMA area on
 stm32mp157c-ev1-scmi

Grow the CMA size to 128MB. The Continuous Memory Allocator allows to
create large chunks of continuous physical memory addresses. This
could be typically the reserved memory for the GPU.

Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
Change-Id: I02d5a36036000f6bd7e071612f58de94932cd1f3
Reviewed-on: https://gerrit.st.com/c/mpu/oe/st/linux-stm32/+/299471
ACI: CITOOLS <MDG-smet-aci-reviews@list.st.com>
ACI: CIBUILD <MDG-smet-aci-builds@list.st.com>
Reviewed-by: Philippe CORNU <philippe.cornu@foss.st.com>
Reviewed-by: Yannick FERTRE <yannick.fertre@foss.st.com>
Domain-Review: Philippe CORNU <philippe.cornu@foss.st.com>
---
 arch/arm/boot/dts/stm32mp157c-ev1-scmi.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/boot/dts/stm32mp157c-ev1-scmi.dtsi b/arch/arm/boot/dts/stm32mp157c-ev1-scmi.dtsi
index 135ef35e1db1..a7fdcf16e324 100644
--- a/arch/arm/boot/dts/stm32mp157c-ev1-scmi.dtsi
+++ b/arch/arm/boot/dts/stm32mp157c-ev1-scmi.dtsi
@@ -10,6 +10,15 @@
 			reg = <0xfe000000 0x2000000>;
 			no-map;
 		};
+
+		/* global autoconfigured region for contiguous allocations */
+		linux,cma {
+			compatible = "shared-dma-pool";
+			reusable;
+			size = <0x8000000>;
+			alignment = <0x2000>;
+			linux,cma-default;
+		};
 	};
 };