[v4,0/6] Configure imx8mp dsp node for rproc usage

Message

Daniel Baluta Feb. 12, 2025, 8:52 a.m. UTC

DSP found in i.MX8MP SOC can be used by multiple frameworks in order to
enable various applications:
        - rproc/rpmsg framework, used to load for example Zephyr samples
        - Sound Open Firmware, used to enable various audio processing
          pipelines.

Current dsp node was configured with SOF in mind but it doesn't work
well with imx8mp-evk dts. SOF controls audio IPs from firmware side
while imx8mp-evk.dts preffers to control audio IPs from Linux side.

So, configure 'dsp' node to be used with rproc scenario and later will
add a separate dts or an overlay to configure the node for SOF.

This patch series configures and enables dsp node to be used with rproc.

Changes since v3:
	- clarify controversy on the need of abstracting the AudioMix
          as a reset controlle for DSP. This is not the case! Audiomix is used only for
          Reset/Stall and it doesn't have the capability to reset the DSP. Reset
          is done via a separate interface (DAP).
	- Removed duplicate clock in patch 3/6
        - Add R-b tags.

Changes since v2:
        - Fix dts example in patch 4/6

Changes since v1:
        - document syscon compatible as pointed by Peng Fan
        - do not disable dsp_reserved node in the dtsi file as pointed
          by Ahmad Fatoum.


Daniel Baluta (6):
  arm64: dts: imx8mp: Add mu2 root clock
  arm64: dts: imx8mp: Configure dsp node for rproc usage
  arm64: dts: imx8mp: Add DSP clocks
  dt-bindings: clock: imx8mp: Add syscon compatible
  arm64: dts: imx8mp: Add fsl,dsp-ctrl property for dsp
  arm64: dts: Add dsp rproc related mem regions

 .../bindings/clock/imx8mp-audiomix.yaml       |  6 ++++--
 arch/arm64/boot/dts/freescale/imx8mp-evk.dts  | 10 +++++++++
 arch/arm64/boot/dts/freescale/imx8mp.dtsi     | 21 ++++++++++++-------
 3 files changed, 27 insertions(+), 10 deletions(-)