[PATCH v2 00/12] 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

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

https://lore.kernel.org/linux-phy/20260428-rockchip-usbdp-cleanup-v4-0-7775671ece22@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.

P.S.: I will be out of office in May, so please do not expect speedy
      response from me :)

Changes since PATCHv1:
 * https://lore.kernel.org/r/20260326-synopsys-dw-dp-improvements-v1-0-501849162290@collabora.com
 * rebased to latest drm-misc-next
 * prepended the Patches from Cristian's cleanup series, as they also
   needed a rebase and should be merged first
   https://lore.kernel.org/dri-devel/20260327-drm-rk-fixes-v3-0-fd2e6900c08c@collabora.com/
 * fix issue with the audio stream (un)prepare handling in last patch

Signed-off-by: Sebastian Reichel <sebastian.reichel at collabora.com>
---
Cristian Ciocaltea (2):
      drm/bridge: synopsys: dw-dp: Support unregistering the AUX channel
      drm/rockchip: dw_dp: Release core resources

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/rockchip: dw_dp: Implement out-of-band HPD handling
      drm/bridge: synopsys: dw-dp: Support software triggered OOB HPD
      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            | 314 ++++++++++++++++++++-
 drivers/gpu/drm/display/drm_bridge_connector.c     |   6 +
 drivers/gpu/drm/rockchip/dw_dp-rockchip.c          | 180 +++++++++++-
 include/drm/bridge/dw_dp.h                         |   7 +
 include/drm/drm_bridge.h                           |  14 +
 6 files changed, 512 insertions(+), 14 deletions(-)
---
base-commit: 3221890f4e14f17ab46224798e89fbe099904edc
change-id: 20260325-synopsys-dw-dp-improvements-7da2e98df1dd

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