2021-07-23 11:07:17

by Daniel Baluta (OSS)

Subject: [PATCH v3] arm64: dts: imx8mp: Add dsp node

From: Daniel Baluta <[email protected]>

i.MX8 MPlus SoC integrates Cadence HIFI4 DSP. This core runs either a
custom firmware or the open source SOF firmware [1]

DSP device is handled by SOF OF driver found in
sound/soc/sof/sof-of-dev.c

Notice that the DSP node makes use of:
- dsp_reserved, a reserved memory region for various Audio
resources (e.g firmware loading, audio buffers, etc).
- Messaging Unit (mu2) for passing notifications betweem ARM
core and DSP.

[1] https://thesofproject.github.io/latest/platforms/index.html
Signed-off-by: Daniel Baluta <[email protected]>
---
Changes since v2:
* add new line between dts nodes

Changes since v1:
» * mark MU2 node as disabled, because mu2 clock support is not yet upstream.

arch/arm64/boot/dts/freescale/imx8mp.dtsi | 30 +++++++++++++++++++++++
1 file changed, 30 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
index 9f7c7f587d38..2a1a4ff36c67 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
@@ -135,6 +135,17 @@ clk_ext4: clock-ext4 {
clock-output-names = "clk_ext4";
};

+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ dsp_reserved: dsp@92400000 {
+ reg = <0 0x92400000 0 0x2000000>;
+ no-map;
+ };
+ };
+
pmu {
compatible = "arm,cortex-a53-pmu";
interrupts = <GIC_PPI 7
@@ -698,6 +709,14 @@ mu: mailbox@30aa0000 {
#mbox-cells = <2>;
};

+ mu2: mailbox@30e60000 {
+ compatible = "fsl,imx8mp-mu", "fsl,imx6sx-mu";
+ reg = <0x30e60000 0x10000>;
+ interrupts = <GIC_SPI 136 IRQ_TYPE_LEVEL_HIGH>;
+ #mbox-cells = <2>;
+ status = "disabled";
+ };
+
i2c5: i2c@30ad0000 {
compatible = "fsl,imx8mp-i2c", "fsl,imx21-i2c";
#address-cells = <1>;
@@ -938,5 +957,16 @@ usb_dwc3_1: usb@38200000 {
snps,dis-u2-freeclk-exists-quirk;
};
};
+
+ dsp: dsp@3b6e8000 {
+ compatible = "fsl,imx8mp-dsp";
+ reg = <0x3b6e8000 0x88000>;
+ mbox-names = "txdb0", "txdb1",
+ "rxdb0", "rxdb1";
+ mboxes = <&mu2 2 0>, <&mu2 2 1>,
+ <&mu2 3 0>, <&mu2 3 1>;
+ memory-region = <&dsp_reserved>;
+ status = "disabled";
+ };
};
};
--
2.27.0

2021-07-26 01:26:15

by Shawn Guo

Subject: Re: [PATCH v3] arm64: dts: imx8mp: Add dsp node

On Fri, Jul 23, 2021 at 02:05:40PM +0300, Daniel Baluta wrote:
> From: Daniel Baluta <[email protected]>
>
> i.MX8 MPlus SoC integrates Cadence HIFI4 DSP. This core runs either a
> custom firmware or the open source SOF firmware [1]
>
> DSP device is handled by SOF OF driver found in
> sound/soc/sof/sof-of-dev.c
>
> Notice that the DSP node makes use of:
> - dsp_reserved, a reserved memory region for various Audio
> resources (e.g firmware loading, audio buffers, etc).
> - Messaging Unit (mu2) for passing notifications betweem ARM
> core and DSP.
>
> [1] https://thesofproject.github.io/latest/platforms/index.html
> Signed-off-by: Daniel Baluta <[email protected]>

Applied, thanks!