openwrt/target/linux/bcm27xx/patches-5.4/950-0503-dtoverlays-Add-overlay-to-enable-the-HEVC-V4L2-drive.patch

From b1d6499e00b6061ecc7061335199acf86f54d31a Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Fri, 13 Mar 2020 16:52:55 +0000
Subject: [PATCH] dtoverlays: Add overlay to enable the HEVC V4L2
 driver

This replaces the rpivid_mem register mapping driver.
When the driver is complete, these DT changes should be
merged into the base DT instead of being an overlay.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
 arch/arm/boot/dts/overlays/Makefile           |  1 +
 arch/arm/boot/dts/overlays/README             |  7 +++
 .../boot/dts/overlays/rpivid-v4l2-overlay.dts | 55 +++++++++++++++++++
 4 files changed, 63 insertions(+), 2 deletions(-)
 create mode 100644 arch/arm/boot/dts/overlays/rpivid-v4l2-overlay.dts

--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -140,6 +140,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	rpi-proto.dtbo \
 	rpi-sense.dtbo \
 	rpi-tv.dtbo \
+	rpivid-v4l2.dtbo \
 	rra-digidac1-wm8741-audio.dtbo \
 	sc16is750-i2c.dtbo \
 	sc16is752-i2c.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -2064,6 +2064,13 @@ Load:   dtoverlay=rpi-tv
 Params: <None>
 
 
+Name:   rpivid-v4l2
+Info:   Load the V4L2 stateless video decoder driver for the HEVC block,
+        disabling the memory mapped devices in the process.
+Load:   dtoverlay=rpivid-v4l2
+Params: <None>
+
+
 Name:   rra-digidac1-wm8741-audio
 Info:   Configures the Red Rocks Audio DigiDAC1 soundcard
 Load:   dtoverlay=rra-digidac1-wm8741-audio
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/rpivid-v4l2-overlay.dts
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Definitions for Raspberry Pi video decode engine
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+/{
+	compatible = "brcm,bcm2711";
+
+	fragment@0 {
+		target = <&scb>;
+		__overlay__ {
+			/* needed to avoid dtc warning */
+			#address-cells = <2>;
+			#size-cells = <1>;
+			codec@7eb10000 {
+				compatible = "raspberrypi,rpivid-vid-decoder";
+				reg = <0x0 0x7eb10000 0x1000>,	/* INTC */
+				      <0x0 0x7eb00000 0x10000>; /* HEVC */
+				reg-names = "intc",
+					    "hevc";
+
+				interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
+
+				clocks = <&hevc_clk>;
+				clock-names = "hevc";
+
+				hevc_clk: hevc_clk {
+					compatible = "fixed-clock";
+					#clock-cells = <0>;
+					clock-frequency = <500000000>;
+				};
+			};
+		};
+	};
+
+	fragment@1 {
+		target = <&scb>;
+		__overlay__ {
+			hevc-decoder@7eb00000 {
+				status = "disabled";
+			};
+			rpivid-local-intc@7eb10000 {
+				status = "disabled";
+			};
+			h264-decoder@7eb20000 {
+				status = "disabled";
+			};
+			vp9-decoder@7eb30000 {
+				status = "disabled";
+			};
+		};
+	};
+};