linux-kernel - [PATCH] arm64: dts: qcom: sc8280xp: Define CMA region for CRD and X13s

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Date:   Thu, 12 Jan 2023 20:10:25 -0800
From:   Bjorn Andersson <quic_bjorande@...cinc.com>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>
CC:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Johan Hovold <johan@...nel.org>
Subject: [PATCH] arm64: dts: qcom: sc8280xp: Define CMA region for CRD and X13s

Booting the CRD needs roughly 64MB CMA, rather than relying on people
adding boot parameters etc define a region for this, to remove the
allocation errors from e.g. NVME.

While fixing the CRD define the same region for the X13s.

Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
---
 arch/arm64/boot/dts/qcom/sc8280xp-crd.dts                | 9 +++++++++
 .../boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts      | 9 +++++++++
 2 files changed, 18 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
index b29c02307839..e30a37c73b90 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
+++ b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
@@ -128,6 +128,15 @@ vreg_wwan: regulator-wwan {
 
 		regulator-boot-on;
 	};
+
+	reserved-memory {
+		linux,cma {
+			compatible = "shared-dma-pool";
+			size = <0x0 0x8000000>;
+			reusable;
+			linux,cma-default;
+		};
+	};
 };
 
 &apps_rsc {
diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
index 78e61a8184c5..5bfd1f0b2a24 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
+++ b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
@@ -153,6 +153,15 @@ vreg_wwan: regulator-wwan {
 		regulator-boot-on;
 	};
 
+	reserved-memory {
+		linux,cma {
+			compatible = "shared-dma-pool";
+			size = <0x0 0x8000000>;
+			reusable;
+			linux,cma-default;
+		};
+	};
+
 	thermal-zones {
 		skin-temp-thermal {
 			polling-delay-passive = <250>;
-- 
2.37.3