linux-kernel - [RFC v3 0/3] Mediatek MT8173 CMDQ support

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Date:	Fri, 18 Mar 2016 19:27:11 +0800
From:	HS Liao <hs.liao@...iatek.com>
To:	Rob Herring <robh+dt@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>
CC:	Daniel Kurtz <djkurtz@...omium.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-mediatek@...ts.infradead.org>,
	<srv_heupstream@...iatek.com>,
	Sascha Hauer <kernel@...gutronix.de>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Nicolas Boichat <drinkcat@...omium.org>,
	CK HU <ck.hu@...iatek.com>,
	cawa cheng <cawa.cheng@...iatek.com>,
	Bibby Hsieh <bibby.hsieh@...iatek.com>,
	YT Shen <yt.shen@...iatek.com>,
	Daoyuan Huang <daoyuan.huang@...iatek.com>,
	Damon Chu <damon.chu@...iatek.com>,
	Josh-YC Liu <josh-yc.liu@...iatek.com>,
	Glory Hung <glory.hung@...iatek.com>,
	Jiaguang Zhang <jiaguang.zhang@...iatek.com>
Subject: [RFC v3 0/3] Mediatek MT8173 CMDQ support


Hi,

This is Mediatek MT8173 Command Queue(CMDQ) driver. The CMDQ is used
to help read/write registers with critical time limitation, such as
updating display configuration during the vblank. It controls Global
Command Engine (GCE) hardware to achieve this requirement.

These patches have a build dependency on top of v4.5-rc1.

Changes since v2:
 - use cmdq instead of cqctx
 - document cmdq_code
 - use cmdq thread base instead of thread id, so remove thread id
 - remove buffer pool and let linux manage memory
 - remove task_free_list
 - merge cmdq_task_exec_async_impl into cmdq_task_exec_async
 - use list_for_each_entry_safe instead of list_for_each_safe
 - merge cmdq_dev_init into cmdq_probe
 - use cmdq record(rec) instead of cmdq handle
 - use cmdq command instead of cmdq desc
 - remove unused interfaces
 - set IRQF_TRIGGER_LOW in device tree
 - remove event array and related code since client should clear event
   before wait it
 - report status to callback function
 - remove some debug code
 - remove some protection code, e.g. suspend/resume
 - rewrite some code to shrink code size

Best regards,
HS Liao

HS Liao (3):
  dt-bindings: soc: Add documentation for the MediaTek GCE unit
  CMDQ: Mediatek CMDQ driver
  arm64: dts: mt8173: Add GCE node

 .../devicetree/bindings/soc/mediatek/gce.txt       |   34 +
 arch/arm64/boot/dts/mediatek/mt8173.dtsi           |    8 +
 drivers/soc/mediatek/Kconfig                       |   10 +
 drivers/soc/mediatek/Makefile                      |    1 +
 drivers/soc/mediatek/mtk-cmdq.c                    | 1805 ++++++++++++++++++++
 include/soc/mediatek/cmdq.h                        |  181 ++
 6 files changed, 2039 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/mediatek/gce.txt
 create mode 100644 drivers/soc/mediatek/mtk-cmdq.c
 create mode 100644 include/soc/mediatek/cmdq.h

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