[PATCH 7/9] ARM: dts: bcm2711-rpi: Use 40-bit DMA for HDMI audio

[Peter Robinson]

Enable the dma40 controller on the Raspberry Pi 4, ch 11
is reserved for the VPU firmware for VCHIQ communication,
and add the DMA channels for HDMI audio.

Signed-off-by: Peter Robinson <pbrobinson at gmail.com>
---
 arch/arm/boot/dts/broadcom/bcm2711-rpi.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm/boot/dts/broadcom/bcm2711-rpi.dtsi b/arch/arm/boot/dts/broadcom/bcm2711-rpi.dtsi
index 1eb6406449d19..a49a732d3f64e 100644
--- a/arch/arm/boot/dts/broadcom/bcm2711-rpi.dtsi
+++ b/arch/arm/boot/dts/broadcom/bcm2711-rpi.dtsi
@@ -42,6 +42,12 @@ i2c0_1: i2c at 1 {
 	};
 };
 
+&dma40 {
+	/* The VPU firmware uses DMA channel 11 for VCHIQ */
+	brcm,dma-channel-mask = <0x7000>;
+	status = "okay";
+};
+
 &firmware {
 	expgpio: gpio {
 		compatible = "raspberrypi,firmware-gpio";
@@ -59,12 +65,14 @@ reset: reset {
 &hdmi0 {
 	clocks = <&firmware_clocks 13>, <&firmware_clocks 14>, <&dvp 0>, <&clk_27MHz>;
 	clock-names = "hdmi", "bvb", "audio", "cec";
+	dmas = <&dma40 10>;
 	wifi-2.4ghz-coexistence;
 };
 
 &hdmi1 {
 	clocks = <&firmware_clocks 13>, <&firmware_clocks 14>, <&dvp 1>, <&clk_27MHz>;
 	clock-names = "hdmi", "bvb", "audio", "cec";
+	dmas = <&dma40 17>;
 	wifi-2.4ghz-coexistence;
 };
 
-- 
2.56.0