linux-kernel - [PATCH 6/6] arm64: dts: qcom: sdm845-db845c-navigation-mezzanine: Add cma heap for libcamera softisp support

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Message-Id: <20241025-b4-linux-next-24-10-25-camss-dts-fixups-v1-6-cdff2f1a5792@linaro.org>
Date: Fri, 25 Oct 2024 16:43:28 +0100
From: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: Depeng Shao <quic_depengs@...cinc.com>, 
 Vikram Sharma <quic_vikramsa@...cinc.com>, 
 Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>, 
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Subject: [PATCH 6/6] arm64: dts: qcom: sdm845-db845c-navigation-mezzanine:
 Add cma heap for libcamera softisp support

libcamera softisp requires a linux,cma heap export in order to support
user-space debayering, 3a and export to other system components such as
pipewire, Firefox/Chromium - Hangouts, Zoom etc.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
---
 .../boot/dts/qcom/sdm845-db845c-navigation-mezzanine.dtso     | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-db845c-navigation-mezzanine.dtso b/arch/arm64/boot/dts/qcom/sdm845-db845c-navigation-mezzanine.dtso
index d62a20f018e7a7e1c7e77f0c927c2d9fe7ae8509..c8507afcd1e0d1f9b14b6e4edcbc646032e7b6c9 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-db845c-navigation-mezzanine.dtso
+++ b/arch/arm64/boot/dts/qcom/sdm845-db845c-navigation-mezzanine.dtso
@@ -9,6 +9,17 @@
 #include <dt-bindings/clock/qcom,camcc-sdm845.h>
 #include <dt-bindings/gpio/gpio.h>
 
+/ {
+	reserved-memory {
+		linux,cma {
+			compatible = "shared-dma-pool";
+			size = <0x0 0x8000000>;
+			reusable;
+			linux,cma-default;
+		};
+	};
+};
+
 &camss {
 	vdda-phy-supply = <&vreg_l1a_0p875>;
 	vdda-pll-supply = <&vreg_l26a_1p2>;

-- 
2.47.0