linux-kernel - [PATCH v5 0/2] add VCP mailbox driver

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Message-ID: <20250822021217.1598-1-jjian.zhou@mediatek.com>
Date: Fri, 22 Aug 2025 10:12:07 +0800
From: Jjian Zhou <jjian.zhou@...iatek.com>
To: Jassi Brar <jassisinghbrar@...il.com>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>, Jjian Zhou
	<Jjian.Zhou@...iatek.com>, Chen-Yu Tsai <wenst@...omium.org>
CC: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>,
	<Project_Global_Chrome_Upstream_Group@...iatek.com>, Jjian Zhou
	<jjian.zhou@...iatek.com>
Subject: [PATCH v5 0/2] add VCP mailbox driver

Hi everyone,

This is v5 of my VCP mailbox driver.

Changes since v5:
- bindngs:
  - Patch 1 fix 'make dt_binding_check' errors.

Changes since v4:
- binding:
  - Match the binding file name and compatible.
- mtk-vcp-mailbox.c:
  - Drop 'dev_dbg(dev, "MTK VCP mailbox initialized\n")'.
- Since the reviewer hopes to combine the VCP IPC driver and
  the VCP driver for a unified review, the original three patches
  have been split into two parts: the VCP mailbox driver and
  the binding remain together, while the VCP IPC driver is merged
  with the VCP driver and submitted as one.
- Link to v4
  https://lore.kernel.org/all/20250820094545.23821-1-jjian.zhou@mediatek.com/

Changes since v3:
- binding:
  - Remove unused lable '|' and 'vcp_mailbox0'.
- Link to v3
  https://lore.kernel.org/all/20250317110331.2776-1-jjian.zhou@mediatek.com/

Changes since v1:
- Link to v1
  https://lore.kernel.org/all/20250305082047.15746-1-jjian.zhou@mediatek.com/

In the v2 version, there is ongoing discussion about whether the VCP's
IPC should use mailbox or rpmsg. To prevent the discussion records
from being lost, the previous discussion link is attached.
https://lore.kernel.org/all/CAGXv+5FXqZb_v2dQNgCKbFpJrLhbVk3f0sWrrMCVk3jaWwoBqA@mail.gmail.com/

Jjian Zhou (2):
  dt-bindings: mailbox: mediatek,mt8196-vcp-mbox: add mtk vcp-mbox
    document
  mailbox: mediatek: Add mtk-vcp-mailbox driver

 .../mailbox/mediatek,mt8196-vcp-mbox.yaml     |  49 +++++
 drivers/mailbox/Kconfig                       |   9 +
 drivers/mailbox/Makefile                      |   2 +
 drivers/mailbox/mtk-vcp-mailbox.c             | 174 ++++++++++++++++++
 include/linux/mailbox/mtk-vcp-mailbox.h       |  32 ++++
 5 files changed, 266 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mailbox/mediatek,mt8196-vcp-mbox.yaml
 create mode 100644 drivers/mailbox/mtk-vcp-mailbox.c
 create mode 100644 include/linux/mailbox/mtk-vcp-mailbox.h

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2.46.0