Re: [PATCH 00/30] drm/bridge: Add device links for lifetime control

[Russell King - ARM Linux admin <linux@armlinux.org.uk>]

What happened with the patches I posted doing exactly this?

On Tue, Nov 26, 2019 at 01:15:58PM +0000, Mihail Atanassov wrote:
> Hi all,
> 
> This series adds device links support to drm_bridge. The motivation
> behind it is that a drm_bridge in a module could get removed under the
> feet of the bridge user without warning, so we need a way to remove and
> reprobe the client as needed to avoid peering into the void.
> 
> 1: Add a drm_bridge_init() function which wraps all initialisation of
> the structure prior to calling drm_bridge_add().
> 
> 2-26,28: Apply the drm_bridge_init() refactor to every bridge that uses
> drm_bridge_add().
> 
> 27: Minor cleanup in rcar-du.
> 
> 29: Add of_drm_find_bridge_devlink() which functions the same as
> of_drm_find_bridge() plus adds a device device link from the owning
> drm_device to the bridge device.
> 
> 30: As a motivating example, convert komeda to exclusively use
> drm_bridge for its pipe outputs; this isn't a regression in usability
> any more since device links bring the same automatic remove/reprobe
> feature as components.
> 
> Mihail Atanassov (29):
>   drm: Introduce drm_bridge_init()
>   drm/bridge: adv7511: Use drm_bridge_init()
>   drm/bridge: anx6345: Use drm_bridge_init()
>   drm/bridge: anx78xx: Use drm_bridge_init()
>   drm/bridge: cdns: Use drm_bridge_init()
>   drm/bridge: dumb-vga-dac: Use drm_bridge_init()
>   drm/bridge: lvds-encoder: Use drm_bridge_init()
>   drm/bridge: megachips-stdpxxxx-ge-b850v3-fw: Use drm_bridge_init()
>   drm/bridge: nxp-ptn3460: Use drm_bridge_init()
>   drm/bridge: panel: Use drm_bridge_init()
>   drm/bridge: ps8622: Use drm_bridge_init()
>   drm/bridge: sii902x: Use drm_bridge_init()
>   gpu: drm: bridge: sii9234: Use drm_bridge_init()
>   drm/bridge: sil_sii8620: Use drm_bridge_init()
>   drm/bridge: dw-hdmi: Use drm_bridge_init()
>   drm/bridge/synopsys: dsi: Use drm_bridge_init()
>   drm/bridge: tc358764: Use drm_bridge_init()
>   drm/bridge: tc358767: Use drm_bridge_init()
>   drm/bridge: thc63: Use drm_bridge_init()
>   drm/bridge: ti-sn65dsi86: Use drm_bridge_init()
>   drm/bridge: ti-tfp410: Use drm_bridge_init()
>   drm/exynos: mic: Use drm_bridge_init()
>   drm/i2c: tda998x: Use drm_bridge_init()
>   drm/mcde: dsi: Use drm_bridge_init()
>   drm/mediatek: hdmi: Use drm_bridge_init()
>   drm: rcar-du: lvds: Use drm_bridge_init()
>   drm: rcar-du: lvds: Don't set drm_bridge private pointer
>   drm/sti: sti_vdo: Use drm_bridge_init()
>   drm/komeda: Use drm_bridge interface for pipe outputs
> 
> Russell King (1):
>   drm/bridge: add support for device links to bridge
> 
>  .../gpu/drm/arm/display/komeda/komeda_drv.c   | 54 ++++++-------
>  .../gpu/drm/arm/display/komeda/komeda_kms.c   | 77 ++++++++++++++++--
>  .../gpu/drm/arm/display/komeda/komeda_kms.h   |  2 +
>  drivers/gpu/drm/bridge/adv7511/adv7511_drv.c  |  5 +-
>  .../drm/bridge/analogix/analogix-anx6345.c    |  5 +-
>  .../drm/bridge/analogix/analogix-anx78xx.c    |  8 +-
>  drivers/gpu/drm/bridge/cdns-dsi.c             |  4 +-
>  drivers/gpu/drm/bridge/dumb-vga-dac.c         |  6 +-
>  drivers/gpu/drm/bridge/lvds-encoder.c         |  7 +-
>  .../bridge/megachips-stdpxxxx-ge-b850v3-fw.c  |  4 +-
>  drivers/gpu/drm/bridge/nxp-ptn3460.c          |  4 +-
>  drivers/gpu/drm/bridge/panel.c                |  7 +-
>  drivers/gpu/drm/bridge/parade-ps8622.c        |  3 +-
>  drivers/gpu/drm/bridge/sii902x.c              |  5 +-
>  drivers/gpu/drm/bridge/sii9234.c              |  3 +-
>  drivers/gpu/drm/bridge/sil-sii8620.c          |  3 +-
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c     |  7 +-
>  drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c |  7 +-
>  drivers/gpu/drm/bridge/tc358764.c             |  4 +-
>  drivers/gpu/drm/bridge/tc358767.c             |  3 +-
>  drivers/gpu/drm/bridge/thc63lvd1024.c         |  7 +-
>  drivers/gpu/drm/bridge/ti-sn65dsi86.c         |  5 +-
>  drivers/gpu/drm/bridge/ti-tfp410.c            |  5 +-
>  drivers/gpu/drm/drm_bridge.c                  | 78 +++++++++++++++----
>  drivers/gpu/drm/exynos/exynos_drm_mic.c       |  8 +-
>  drivers/gpu/drm/i2c/tda998x_drv.c             |  6 +-
>  drivers/gpu/drm/mcde/mcde_dsi.c               |  3 +-
>  drivers/gpu/drm/mediatek/mtk_hdmi.c           |  4 +-
>  drivers/gpu/drm/rcar-du/rcar_lvds.c           |  5 +-
>  drivers/gpu/drm/sti/sti_dvo.c                 |  4 +-
>  include/drm/drm_bridge.h                      |  8 ++
>  31 files changed, 217 insertions(+), 134 deletions(-)
> 
> -- 
> 2.23.0
> 
> 

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