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    Subject[PATCH v2 00/34] component: Make into an aggregate bus
    Date
    This series is from discussion we had on reordering the device lists for
    drm shutdown paths[1]. I've introduced an 'aggregate' bus that we put
    the aggregate device onto and then we probe the aggregate device once
    all the components are probed and call component_add(). The probe/remove
    hooks are where the bind/unbind calls go, and then a shutdown hook is
    added that can be used to shutdown the drm display pipeline at the right
    time.

    This works for me on my sc7180 board. I no longer get a warning from i2c
    at shutdown that we're trying to make an i2c transaction after the i2c
    bus has been shutdown. There's more work to do on the msm drm driver to
    extract component device resources like clks, regulators, etc. out of
    the component bind function into the driver probe but I wanted to move
    everything over now in other component drivers before tackling that
    problem.

    I'll definitely be sending a v3 so this is partially a request for
    testing to shake out any more problems. Tested-by tags would be appreciated,
    and Acked-by/Reviewed-by tags too. I sent this to gregkh which may be
    incorrect but I don't know what better tree to send it all through.
    Maybe drm?

    I'll be faster at resending this next time, sorry for the long delay!

    Changes since v1 (https://lore.kernel.org/r/20210520002519.3538432-1-swboyd@chromium.org):
    - Use devlink to connect components to the aggregate device
    - Don't set the registering device as a parent of the aggregate device
    - New patch for bind_component/unbind_component ops that takes the
    aggregate device
    - Convert all drivers in the tree to use the aggregate driver approach
    - Allow one aggregate driver to be used for multiple aggregate devices

    [1] https://lore.kernel.org/r/20210508074118.1621729-1-swboyd@chromium.org

    Stephen Boyd (34):
    component: Introduce struct aggregate_device
    component: Introduce the aggregate bus_type
    component: Move struct aggregate_device out to header file
    drm/msm: Migrate to aggregate driver
    component: Add {bind,unbind}_component() ops that take aggregate
    device
    drm/of: Add a drm_of_aggregate_probe() API
    drm/komeda: Migrate to aggregate driver
    drm/arm/hdlcd: Migrate to aggregate driver
    drm/malidp: Migrate to aggregate driver
    drm/armada: Migrate to aggregate driver
    drm/etnaviv: Migrate to aggregate driver
    drm/kirin: Migrate to aggregate driver
    drm/exynos: Migrate to aggregate driver
    drm/imx: Migrate to aggregate driver
    drm/ingenic: Migrate to aggregate driver
    drm/mcde: Migrate to aggregate driver
    drm/mediatek: Migrate to aggregate driver
    drm/meson: Migrate to aggregate driver
    drm/omap: Migrate to aggregate driver
    drm/rockchip: Migrate to aggregate driver
    drm/sti: Migrate to aggregate driver
    drm/sun4i: Migrate to aggregate driver
    drm/tilcdc: Migrate to aggregate driver
    drm/vc4: Migrate to aggregate driver
    drm/zte: Migrate to aggregate driver
    iommu/mtk: Migrate to aggregate driver
    mei: Migrate to aggregate driver
    power: supply: ab8500: Migrate to aggregate driver
    fbdev: omap2: Migrate to aggregate driver
    sound: hdac: Migrate to aggregate driver
    ASoC: codecs: wcd938x: Migrate to aggregate driver
    component: Get rid of drm_of_component_probe()
    component: Remove component_master_ops and friends
    component: Remove all references to 'master'

    Cc: Arnd Bergmann <arnd@arndb.de>
    Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
    Cc: Chen Feng <puck.chen@hisilicon.com>
    Cc: Chen-Yu Tsai <wens@csie.org>
    Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
    Cc: Chun-Kuang Hu <chunkuang.hu@kernel.org>
    Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
    Cc: Emma Anholt <emma@anholt.net>
    Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Cc: "Heiko Stübner" <heiko@sntech.de>
    Cc: Inki Dae <inki.dae@samsung.com>
    Cc: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
    Cc: Jaroslav Kysela <perex@perex.cz>
    Cc: Joerg Roedel <joro@8bytes.org>
    Cc: John Stultz <john.stultz@linaro.org>
    Cc: Joonyoung Shim <jy0922.shim@samsung.com>
    Cc: Jyri Sarha <jyri.sarha@iki.fi>
    Cc: Kai Vehmanen <kai.vehmanen@linux.intel.com>
    Cc: Kyungmin Park <kyungmin.park@samsung.com>
    Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
    Cc: <linux-fbdev@vger.kernel.org>
    Cc: <linux-omap@vger.kernel.org>
    Cc: <linux-pm@vger.kernel.org>
    Cc: Liviu Dudau <liviu.dudau@arm.com>
    Cc: Lucas Stach <l.stach@pengutronix.de>
    Cc: Mark Brown <broonie@kernel.org>
    Cc: Maxime Ripard <mripard@kernel.org>
    Cc: Neil Armstrong <narmstrong@baylibre.com>
    Cc: Paul Cercueil <paul@crapouillou.net>
    Cc: Philipp Zabel <p.zabel@pengutronix.de>
    Cc: "Rafael J. Wysocki" <rafael@kernel.org>
    Cc: Rob Clark <robdclark@gmail.com>
    Cc: Russell King <linux@armlinux.org.uk>
    Cc: Russell King <linux+etnaviv@armlinux.org.uk>
    Cc: Russell King <rmk+kernel@arm.linux.org.uk>
    Cc: Sandy Huang <hjc@rock-chips.com>
    Cc: Saravana Kannan <saravanak@google.com>
    Cc: Sebastian Reichel <sre@kernel.org>
    Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
    Cc: Takashi Iwai <tiwai@suse.com>
    Cc: Tian Tao <tiantao6@hisilicon.com>
    Cc: Tomas Winkler <tomas.winkler@intel.com>
    Cc: Tomi Valkeinen <tomba@kernel.org>
    Cc: Will Deacon <will@kernel.org>
    Cc: Xinliang Liu <xinliang.liu@linaro.org>
    Cc: Xinwei Kong <kong.kongxinwei@hisilicon.com>
    Cc: Yong Wu <yong.wu@mediatek.com>

    drivers/base/component.c | 555 +++++++++++-------
    .../gpu/drm/arm/display/komeda/komeda_drv.c | 20 +-
    drivers/gpu/drm/arm/hdlcd_drv.c | 21 +-
    drivers/gpu/drm/arm/malidp_drv.c | 21 +-
    drivers/gpu/drm/armada/armada_drv.c | 23 +-
    drivers/gpu/drm/drm_drv.c | 2 +-
    drivers/gpu/drm/drm_of.c | 20 +-
    drivers/gpu/drm/etnaviv/etnaviv_drv.c | 20 +-
    drivers/gpu/drm/exynos/exynos_drm_drv.c | 21 +-
    .../gpu/drm/hisilicon/kirin/kirin_drm_drv.c | 20 +-
    drivers/gpu/drm/imx/imx-drm-core.c | 20 +-
    drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 24 +-
    drivers/gpu/drm/mcde/mcde_drv.c | 23 +-
    drivers/gpu/drm/mediatek/mtk_drm_drv.c | 20 +-
    drivers/gpu/drm/meson/meson_drv.c | 21 +-
    drivers/gpu/drm/msm/msm_drv.c | 46 +-
    drivers/gpu/drm/omapdrm/dss/dss.c | 17 +-
    drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 20 +-
    drivers/gpu/drm/sti/sti_drv.c | 20 +-
    drivers/gpu/drm/sun4i/sun4i_drv.c | 26 +-
    drivers/gpu/drm/tilcdc/tilcdc_drv.c | 28 +-
    drivers/gpu/drm/vc4/vc4_drv.c | 20 +-
    drivers/gpu/drm/zte/zx_drm_drv.c | 20 +-
    drivers/iommu/mtk_iommu.c | 14 +-
    drivers/iommu/mtk_iommu.h | 6 +-
    drivers/iommu/mtk_iommu_v1.c | 14 +-
    drivers/misc/mei/hdcp/mei_hdcp.c | 22 +-
    drivers/power/supply/ab8500_charger.c | 22 +-
    drivers/video/fbdev/omap2/omapfb/dss/dss.c | 20 +-
    include/drm/drm_of.h | 9 +-
    include/linux/component.h | 92 ++-
    sound/hda/hdac_component.c | 21 +-
    sound/soc/codecs/wcd938x.c | 20 +-
    33 files changed, 780 insertions(+), 488 deletions(-)


    base-commit: e4e737bb5c170df6135a127739a9e6148ee3da82
    --
    https://chromeos.dev

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