linux-kernel - [PATCH 4/8] arm64: tegra: Add NVDEC on Tegra234

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Date:   Tue,  6 Sep 2022 16:28:19 +0300
From:   Mikko Perttunen <cyndis@...si.fi>
To:     Thierry Reding <thierry.reding@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jonathan Hunter <jonathanh@...dia.com>
Cc:     Mikko Perttunen <mperttunen@...dia.com>,
        Ashish Mhetre <amhetre@...dia.com>,
        Sameer Pujar <spujar@...dia.com>,
        dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 4/8] arm64: tegra: Add NVDEC on Tegra234

From: Mikko Perttunen <mperttunen@...dia.com>

Add a device tree node for NVDEC on Tegra234.

Booting the firmware requires some information regarding offsets
within the firmware binary. These are passed through the device
tree, but since the values vary depending on the firmware version,
and the firmware itself is not available to the OS, the flasher is
expected to provide a device tree overlay with values corresponding
to the firmware it is flashing. The overlay then replaces the
placeholder values here.

Signed-off-by: Mikko Perttunen <mperttunen@...dia.com>
---
 arch/arm64/boot/dts/nvidia/tegra234.dtsi | 27 ++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/arch/arm64/boot/dts/nvidia/tegra234.dtsi b/arch/arm64/boot/dts/nvidia/tegra234.dtsi
index 81a0f599685f..65d49b27bc5f 100644
--- a/arch/arm64/boot/dts/nvidia/tegra234.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra234.dtsi
@@ -586,6 +586,33 @@ vic@...40000 {
 				iommus = <&smmu_niso1 TEGRA234_SID_VIC>;
 				dma-coherent;
 			};
+
+			nvdec@...80000 {
+				compatible = "nvidia,tegra234-nvdec";
+				reg = <0x15480000 0x00040000>;
+				clocks = <&bpmp TEGRA234_CLK_NVDEC>,
+				         <&bpmp TEGRA234_CLK_FUSE>,
+				         <&bpmp TEGRA234_CLK_TSEC_PKA>;
+				clock-names = "nvdec", "fuse", "tsec_pka";
+				resets = <&bpmp TEGRA234_RESET_NVDEC>;
+				reset-names = "nvdec";
+				power-domains = <&bpmp TEGRA234_POWER_DOMAIN_NVDEC>;
+				interconnects = <&mc TEGRA234_MEMORY_CLIENT_NVDECSRD &emc>,
+				                <&mc TEGRA234_MEMORY_CLIENT_NVDECSWR &emc>;
+				interconnect-names = "dma-mem", "write";
+				iommus = <&smmu_niso1 TEGRA234_SID_NVDEC>;
+				dma-coherent;
+
+				nvidia,memory-controller = <&mc>;
+
+				/* Placeholder values, to be replaced with values from overlay */
+				nvidia,bl-manifest-offset = <0>;
+				nvidia,bl-data-offset = <0>;
+				nvidia,bl-code-offset = <0>;
+				nvidia,os-manifest-offset = <0>;
+				nvidia,os-data-offset = <0>;
+				nvidia,os-code-offset = <0>;
+			};
 		};
 
 		gpio: gpio@...0000 {
-- 
2.37.0