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.
Changes in PATCHv3:
- Link to v2: https://lore.kernel.org/r/20260501-synopsys-dw-dp-improvements-v2-0-d7e7f6bac77f@collabora.com
- Collect Reviewed-by on "Simplify driver data setting" patch (Andy Yan)
- Use of_drm_get_bridge_by_endpoint instead of devm_drm_of_get_bridge (Luca Ceresoli)
- Use FIELD_PREP_WM16 instead of FIELD_PREP_WM16_CONST (Chaoyi Chen)
- Rebase to latest drm-misc-next (Dropped Cristian's patches)
Changes in PATCHv2:
* Link to v1: 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@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 | 308 ++++++++++++++++++++-
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, 493 insertions(+), 13 deletions(-)
---
base-commit: 2afdfc658f7a7e9ee2a67ec6663922da9c799c53
change-id: 20260325-synopsys-dw-dp-improvements-7da2e98df1dd
Best regards,
--
Sebastian Reichel <sebastian.reichel@collabora.com>