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

Enric Balletbo i Serra enric.balletbo at collabora.com
Wed Jun 30 07:46:40 PDT 2021

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

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,

[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
  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%)


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