linux-kernel - [PATCH 5/8] ARM: sun8i: a33: Add shared display memory pool

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <cbbbc887fcebed08f60c5424c8cbd65a3467ce96.1486655917.git-series.maxime.ripard@free-electrons.com>
Date:   Thu,  9 Feb 2017 17:39:19 +0100
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Chen-Yu Tsai <wens@...e.org>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mm@...ck.org,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Subject: [PATCH 5/8] ARM: sun8i: a33: Add shared display memory pool

The memory buffers might need to be allocated and shared from both the
scanout and the GPU.

Create a memory region reserved for their own usage so that each can
allocate from it, and get the informations on the region that is going to
be used (size and offset).

Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
---
 arch/arm/boot/dts/sun8i-a33.dtsi | 17 +++++++++++++++++
 1 file changed, 17 insertions(+), 0 deletions(-)

diff --git a/arch/arm/boot/dts/sun8i-a33.dtsi b/arch/arm/boot/dts/sun8i-a33.dtsi
index 5a9ba43ccb07..043b1b017276 100644
--- a/arch/arm/boot/dts/sun8i-a33.dtsi
+++ b/arch/arm/boot/dts/sun8i-a33.dtsi
@@ -97,6 +97,7 @@
 	de: display-engine {
 		compatible = "allwinner,sun8i-a33-display-engine";
 		allwinner,pipelines = <&fe0>;
+		memory-region = <&display_pool>;
 		status = "disabled";
 	};
 
@@ -104,6 +105,18 @@
 		reg = <0x40000000 0x80000000>;
 	};
 
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		display_pool: cma {
+			compatible = "shared-dma-pool";
+			size = <0x1000000>;
+			reusable;
+		};
+	};
+
 	soc@...00000 {
 		tcon0: lcd-controller@...0c000 {
 			compatible = "allwinner,sun8i-a33-tcon";
@@ -267,6 +280,10 @@
 	compatible = "allwinner,sun8i-a33-ccu";
 };
 
+&mali {
+	memory-region = <&display_pool>;
+};
+
 &pio {
 	compatible = "allwinner,sun8i-a33-pinctrl";
 	interrupts = <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>,
-- 
git-series 0.8.11