[PATCH 1/2] ARM: dts: sun4i: Add support for the C1 SRAM region with the SRAM controller

[PATCH 1/2] ARM: dts: sun4i: Add support for the C1 SRAM region with the SRAM controller

[Paul Kocialkowski]

This adds support for the C1 SRAM region (to be used with the SRAM
controller driver) for the A10 platform. The region is shared
between the Video Engine and the CPU.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
---
 arch/arm/boot/dts/sun4i-a10.dtsi | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm/boot/dts/sun4i-a10.dtsi b/arch/arm/boot/dts/sun4i-a10.dtsi
index a2fb473cbb9d..c3a74024ca0f 100644
--- a/arch/arm/boot/dts/sun4i-a10.dtsi
+++ b/arch/arm/boot/dts/sun4i-a10.dtsi
@@ -229,6 +229,19 @@
 					status = "disabled";
 				};
 			};
+
+			sram_c: sram@1d00000 {
+				compatible = "mmio-sram";
+				reg = <0x01d00000 0xd0000>;
+				#address-cells = <1>;
+				#size-cells = <1>;
+				ranges = <0 0x01d00000 0xd0000>;
+
+				ve_sram: sram-section@0 {
+					compatible = "allwinner,sun4i-a10-sram-c1";
+					reg = <0x000000 0x80000>;
+				};
+			};
 		};
 
 		dma: dma-controller@1c02000 {
-- 
2.20.1


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[PATCH 2/2] ARM: dts: sun4i-a10: Add Video Engine and reserved memory nodes

[Paul Kocialkowski]

This adds nodes for the Video Engine and the associated reserved memory
for the A10. Up to 96 MiB of memory are dedicated to the CMA pool.

The VPU can only map the first 256 MiB of DRAM, so the reserved memory
pool has to be located in that area. Following Allwinner's decision in
downstream software, the last 96 MiB of the first 256 MiB of RAM are
reserved for this purpose.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
---
 arch/arm/boot/dts/sun4i-a10.dtsi | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/arch/arm/boot/dts/sun4i-a10.dtsi b/arch/arm/boot/dts/sun4i-a10.dtsi
index c3a74024ca0f..73c3ac42095f 100644
--- a/arch/arm/boot/dts/sun4i-a10.dtsi
+++ b/arch/arm/boot/dts/sun4i-a10.dtsi
@@ -189,6 +189,21 @@
 		interrupts = <3>;
 	};
 
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		/* Address must be kept in the lower 256 MiBs of DRAM for VE. */
+		default-pool {
+			compatible = "shared-dma-pool";
+			size = <0x6000000>;
+			alloc-ranges = <0x4a000000 0x6000000>;
+			reusable;
+			linux,cma-default;
+		};
+	};
+
 	soc {
 		compatible = "simple-bus";
 		#address-cells = <1>;
@@ -412,6 +427,17 @@
 			};
 		};
 
+		video-codec@1c0e000 {
+			compatible = "allwinner,sun4i-a10-video-engine";
+			reg = <0x01c0e000 0x1000>;
+			clocks = <&ccu CLK_AHB_VE>, <&ccu CLK_VE>,
+				 <&ccu CLK_DRAM_VE>;
+			clock-names = "ahb", "mod", "ram";
+			resets = <&ccu RST_VE>;
+			interrupts = <53>;
+			allwinner,sram = <&ve_sram 1>;
+		};
+
 		mmc0: mmc@1c0f000 {
 			compatible = "allwinner,sun4i-a10-mmc";
 			reg = <0x01c0f000 0x1000>;
-- 
2.20.1


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Re: [PATCH 2/2] ARM: dts: sun4i-a10: Add Video Engine and reserved memory nodes

[Maxime Ripard]

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On Fri, Jan 18, 2019 at 03:57:30PM +0100, Paul Kocialkowski wrote:
> This adds nodes for the Video Engine and the associated reserved memory
> for the A10. Up to 96 MiB of memory are dedicated to the CMA pool.
> 
> The VPU can only map the first 256 MiB of DRAM, so the reserved memory
> pool has to be located in that area. Following Allwinner's decision in
> downstream software, the last 96 MiB of the first 256 MiB of RAM are
> reserved for this purpose.
> 
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

Applied both, thanks

Maxime

-- 
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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