linux-kernel - [PATCH 0/2] Add support for DSP IPC protocol driver

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Date:   Fri, 14 Jun 2019 16:16:48 +0800
From:   daniel.baluta@....com
To:     shawnguo@...nel.org
Cc:     s.hauer@...gutronix.de, shengjiu.wang@....com, festevam@...il.com,
        linux-imx@....com, aisheng.dong@....com, daniel.baluta@....com,
        daniel.baluta@...il.com, anson.huang@....com,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        robh+dt@...nel.org, mark.rutland@....com,
        devicetree@...r.kernel.org, o.rempel@...gutronix.de
Subject: [PATCH 0/2] Add support for DSP IPC protocol driver

From: Daniel Baluta <daniel.baluta@....com>

Hifi4 DSP can be found on some i.MX8 platforms (e.g i.MX8QXP, i.MX8QM).
This patch series introduces the layer that allows Host CPU to
communicate with DSP.

This layer provides a doorbell and clients can used that to notify DSP
that a message is placed somewhere in the shared memory.

The protocol used is request - reply. Usually, Host/DSP write a message
in a shared memory area and notify the other side. The other side will
also write a reply in a designated shared memory area and then ring
the doorbell to let the counterpart that a message is ready.

Daniel Baluta (2):
  firmware: imx: Add DSP IPC protocol driver
  dt-bindings: arm: fsl: Add DSP IPC binding support

 .../bindings/arm/freescale/fsl,dsp.yaml       |  43 +++++
 drivers/firmware/imx/Kconfig                  |  11 ++
 drivers/firmware/imx/Makefile                 |   1 +
 drivers/firmware/imx/imx-dsp.c                | 167 ++++++++++++++++++
 include/linux/firmware/imx/dsp.h              |  61 +++++++
 5 files changed, 283 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/freescale/fsl,dsp.yaml
 create mode 100644 drivers/firmware/imx/imx-dsp.c
 create mode 100644 include/linux/firmware/imx/dsp.h

-- 
2.17.1