Hello,
This patch series converts the R-Car DU driver to use the DRM bridge connector helper drm_bridge_connector_init().
The bulk of the v1 series was converting the adv7511, simple-bridge and dw-hdmi drivers to make connector creation optional (through the DRM_BRIDGE_ATTACH_NO_CONNECTOR flag), and have already been merged. v2 includes the remaining patches.
Patch 1/4 addresses the rcar-lvds driver. Instead of implementing direct support for DRM_BRIDGE_ATTACH_NO_CONNECTOR, it simply removes code that shouldn't have been in the driver in the first place by switching to the panel bridge helper.
Patches 2/4 then adds support to the dw-hdmi driver to attach to a downstream bridge if one is specified in DT. As the DT port number corresponding to the video output differs between platforms that integrate the dw-hdmi (some of them even don't have a video output port, which should probably be fixed, but that's out of scope for this series), the port number has to be specified by the platform glue layer. Patch 3/4 does so for the R-Car dw-hdmi driver.
Patch 4/4 finally makes use of the drm_bridge_connector_init() helper.
The series depends on "[PATCH 27/27] drm: Add default modes for connectors in unknown state" ([1]) to avoid a breakage on the VGA output on R-Car Gen3 platforms. That patch has already been approved, and I'll get it merged as a prerequisite.
The series has been tested on the Renesas R-Car Salvator-XS and Draak boards with the VGA, HDMI and LVDS outputs.
[1] https://lore.kernel.org/dri-devel/20200526011505.31884-28-laurent.pinchart+r...
Laurent Pinchart (4): drm: rcar-du: lvds: Convert to DRM panel bridge helper drm: bridge: dw-hdmi: Attach to next bridge if available drm: rcar-du: dw-hdmi: Set output port number drm: rcar-du: Use drm_bridge_connector_init() helper
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 54 +++++++++- drivers/gpu/drm/rcar-du/rcar_du_encoder.c | 25 ++++- drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c | 1 + drivers/gpu/drm/rcar-du/rcar_lvds.c | 120 +++------------------- include/drm/bridge/dw_hdmi.h | 2 + 5 files changed, 88 insertions(+), 114 deletions(-)