[PATCH 00/10] Synopsys DisplayPort Controller improvements for Rockchip platforms

[Sebastian Reichel]

This patch series updates the Synopsys Designware DisplayPort bridge
together with the only existing user: The Rockchip RK3576/RK3588:

 1. follow-up bridges (PHY, USB-C connector)
    this is needed to get USB-C DP AltMode working; I've followed the
    Qualcomm driver as reference

 2. runtime PM
    the initial driver has been upstreamed without RPM; add it to
    avoid wasting power when nothing is plugged

 3. audio
    the initial driver has been upstreamed without audio support;
    this adds all missing bits for audio with single stream transport

The series is based on drm-misc-next with Cristian's cleanup series
applied as I expect that to land first:

https://lore.kernel.org/linux-rockchip/20260310-drm-rk-fixes-v2-0-645ecfb43f49@collabora.com/

To properly make use of the bridge code the following USBDP PHY series
is also needed:

https://lore.kernel.org/linux-rockchip/20260313-rockchip-usbdp-cleanup-v3-0-3e8fe89a35b5@collabora.com/

There are two parts, which possibly need some discussion:

 1. I added a dedicated bridge callback for out-of-band hotplug events,
    which is separate from the hotplug_notify. I have a feeling, that
    there might be a better solution, but haven't found it.

 2. The DT binding for audio support - explicitly marked as RFC - works
    perfectly fine, but is not ready for MST. I don't intend to
    implement that right now, but the binding should obviously take it
    into consideration to avoid breaking it in the future. I've put
    some points for discussion into the relevant patch.

Signed-off-by: Sebastian Reichel <sebastian.reichel at collabora.com>
---
Sebastian Reichel (10):
      drm/bridge: synopsys: dw-dp: Simplify driver data setting
      drm/bridge: synopsys: dw-dp: Support MEDIA_BUS_FMT_FIXED
      drm/bridge: synopsys: dw-dp: Add follow-up bridge support
      drm/bridge: Add out-of-band HPD notify handler
      drm/bridge: synopsys: dw-dp: Support software triggered OOB HPD
      drm/rockchip: dw_dp: Implement out-of-band HPD handling
      drm/bridge: synopsys: dw-dp: Add Runtime PM support
      drm/rockchip: dw_dp: Add runtime PM support
      [RFC] dt-bindings: display: rockchip: dw-dp: fix sound DAI cells
      drm/bridge: synopsys: dw-dp: Add audio support

 .../bindings/display/rockchip/rockchip,dw-dp.yaml  |   5 +-
 drivers/gpu/drm/bridge/synopsys/dw-dp.c            | 284 ++++++++++++++++++++-
 drivers/gpu/drm/display/drm_bridge_connector.c     |   6 +
 drivers/gpu/drm/rockchip/dw_dp-rockchip.c          | 167 +++++++++++-
 include/drm/bridge/dw_dp.h                         |   6 +
 include/drm/drm_bridge.h                           |  14 +
 6 files changed, 469 insertions(+), 13 deletions(-)
---
base-commit: 0660ee19141e5e90b422b7daa0d8518a8d0d898b
change-id: 20260325-synopsys-dw-dp-improvements-7da2e98df1dd

Best regards,
-- 
Sebastian Reichel <sebastian.reichel at collabora.com>