[PATCH v4 0/5] This series is split from the v15 "Add Type-C DP support for RK3399 EVB

From: Chaoyi Chen <[email protected]>

[1] https://lore.kernel.org/all/[email protected]/

====
1. Generic Type-C DP HPD bridge

Currently, several USB-C controller drivers register their own DP HPD
bridge via aux-hpd-bridge.c, each duplicating the same logic. For
devicetree based platforms, the USB-C controller may vary across boards,
and not every USB-C controller driver implements this feature. Patch 1
implements a generic DP HPD bridge that monitors Type-C bus events and
automatically creates an HPD bridge when a Type-C port device with DP
SVID is registered.

2. Multiple bridge model for CDN-DP

The RK3399 has two USB/DP combo PHY and one CDN-DP controller. Patch 5
introduces a multi-bridge model where each PHY port gets a separate
encoder and bridge, allowing flexible selection of the output PHY port.
This is based on the DRM AUX HPD bridge rather than extcon.

====
Patch 1 adds generic USB Type-C DP HPD bridge (Dmitry, Heikki).
Patch 2 adds new API drm_aux_bridge_register_from_node() (Neil).
Patch 3 adds DRM AUX bridge support for RK3399 USBDP PHY (Neil).
Patch 4 drops CDN-DP's extcon dependency when Type-C is present (Dmitry).
Patch 5 adds multiple bridges to support PHY port selection (Dmitry, Luca).

Changes in v4:
- Link to v3: https://lore.kernel.org/all/[email protected]/
- Scan the entire typec_bus and attempt to register the hpd bridge,
  so as not to miss devices that were already added during initialization.

Changes in v3:
- Link to v2: https://lore.kernel.org/all/[email protected]/
  (Sorry, I forgot to add the "v2" title, so it looks like v1.)
- Remove now-redundant call to drm_connector_attach_encoder()
- Rebase to v7.2-rc2

Changes in v2:
- Link to v1: https://lore.kernel.org/all/[email protected]/
- Add copyright text.
- Remove useless goto.
- Fix incorrect function names in the documentation comments.
- Fix the check logic for dp->active_port (0 is valid).
- Fix the uninitialized prev_port.
- Remove duplicate logic from cdn_dp_switch_port().
- Fix the prototype of cdn_dp_bridge_hpd_notify().
- Properly release connector->fwnode.
- Properly release next_bridge.

Chaoyi Chen (5):
  drm/bridge: Implement generic USB Type-C DP HPD bridge
  drm/bridge: aux: Add drm_aux_bridge_register_from_node()
  phy: rockchip: phy-rockchip-typec: Add DRM AUX bridge
  drm/rockchip: cdn-dp: Support handle lane info without extcon
  drm/rockchip: cdn-dp: Add multiple bridges to support PHY port
    selection

 drivers/gpu/drm/bridge/Kconfig                |  10 +
 drivers/gpu/drm/bridge/Makefile               |   1 +
 drivers/gpu/drm/bridge/aux-bridge.c           |  26 +-
 .../gpu/drm/bridge/aux-hpd-typec-dp-bridge.c  |  64 ++++
 drivers/gpu/drm/rockchip/Kconfig              |   1 +
 drivers/gpu/drm/rockchip/cdn-dp-core.c        | 358 ++++++++++++++----
 drivers/gpu/drm/rockchip/cdn-dp-core.h        |  18 +-
 drivers/phy/rockchip/Kconfig                  |   2 +
 drivers/phy/rockchip/phy-rockchip-typec.c     |  13 +-
 include/drm/bridge/aux-bridge.h               |   6 +
 10 files changed, 428 insertions(+), 71 deletions(-)
 create mode 100644 drivers/gpu/drm/bridge/aux-hpd-typec-dp-bridge.c

-- 
2.53.0


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