linux-kernel - [PATCH 0/6] Add support to the mmsys driver to be a reset controller

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Message-Id: <20210630144646.868702-1-enric.balletbo@collabora.com>
Date:   Wed, 30 Jun 2021 16:46:40 +0200
From:   Enric Balletbo i Serra <enric.balletbo@...labora.com>
To:     linux-kernel@...r.kernel.org
Cc:     jitao.shi@...iatek.com, chunkuang.hu@...nel.org,
        matthias.bgg@...il.com, drinkcat@...omium.org, eizan@...omium.org,
        kernel@...labora.com, linux-mediatek@...ts.infradead.org,
        hsinyi@...omium.org, Crystal Guo <crystal.guo@...iatek.com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Fabien Parent <fparent@...libre.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 0/6] Add support to the mmsys driver to be a reset controller

Dear all,

The following patchset is a reimplementation of the patch sent by Jitao
Shi [1] some time ago. As suggested by Chun-Kuang Hu, this time the
reset is done using the reset API, where the mmsys driver is the reset
controller and the mtk_dsi driver is the reset consumer.

Note that the first patch is kind of unrelated change, it's just a
cleanup but is needed if you want to apply all the following patches
cleanly.

This patchset is important in order to have the DSI panel working on some
kukui MT8183 Chromebooks (i.e Lenovo IdeaPad Duet). Without it, you just
get a black screen.

Best regards,
  Enric

[1] https://lore.kernel.org/linux-arm-kernel/20210420132614.150242-4-jitao.shi@mediatek.com/

Enric Balletbo i Serra (6):
  arm64: dts: mediatek: Move reset controller constants into common
    location
  dt-bindings: mediatek: Add #reset-cells to mmsys system controller
  arm64: dts: mt8173: Add the mmsys reset bit to reset the dsi0
  arm64: dts: mt8183: Add the mmsys reset bit to reset the dsi0
  soc: mediatek: mmsys: Add reset controller support
  drm/mediatek: mtk_dsi: Reset the dsi0 hardware

 .../bindings/arm/mediatek/mediatek,mmsys.txt  |  2 +
 arch/arm64/boot/dts/mediatek/mt8173.dtsi      |  2 +
 arch/arm64/boot/dts/mediatek/mt8183.dtsi      |  5 +-
 drivers/gpu/drm/mediatek/mtk_dsi.c            |  5 +-
 drivers/soc/mediatek/mtk-mmsys.c              | 69 +++++++++++++++++++
 drivers/soc/mediatek/mtk-mmsys.h              |  2 +
 .../mt2712-resets.h                           |  0
 include/dt-bindings/reset/mt8173-resets.h     |  2 +
 .../mt8183-resets.h                           |  3 +
 .../mt8192-resets.h                           |  0
 10 files changed, 87 insertions(+), 3 deletions(-)
 rename include/dt-bindings/{reset-controller => reset}/mt2712-resets.h (100%)
 rename include/dt-bindings/{reset-controller => reset}/mt8183-resets.h (98%)
 rename include/dt-bindings/{reset-controller => reset}/mt8192-resets.h (100%)

-- 
2.30.2