Hello, This patch series addresses a design mistake that dates back from the initial DU support. Support for the LVDS encoders, which are IP cores separate from the DU, was bundled in the DU driver. Worse, both the DU and LVDS were described through a single DT node.
To fix the, patches 1/4 and 2/4 define new DT bindings for the LVDS encoders, and deprecate their description inside the DU bindings. To retain backward compatibility with existing DT, patch 3/4 then patch the device tree at runtime to convert the legacy bindings to the new ones. With the DT side addressed, patch 4/4 converts the LVDS support code to a separate bridge driver. I decided to go for live DT patching in patch 3/4 because implementing support for both the legacy and new bindings in the driver would have been very intrusive, and prevented further cleanups. This version relies more heavily on overlays to avoid touching the internals of the OF core compared to v2, even if manual fixes to the device tree are still needed. As all the patches but the last one have been acked, I plan to send a pull request by the end of the week if no new issue is discovered. Compared to v5, I've dropped the OF changeset halpers series as Frank raised concerns about hidding it in the middle of a driver patch series. I've thus copied the implementation of of_changeset_add_property_copy() in the driver to avoid blocking this series. The function arguments are identical, so when the OF changeset helpers will land it will be very easy to drop the private copy and use the of_changeset_add_property_copy() helper. Compared to v4, the patch "of: changeset: Add of_changeset_node_move method" has been dropped as it's not needed. The patches that update the DT sources to the new DU and LVDS bindings have been dropped as well to avoid spamming the lists as they depend on the driver changes going in first to avoid regressions and haven't been changed. Compared to v3, this series uses the OF changeset API to update properties instead of accessing the internals of the property structure. This removes the local implementation of functions to look up nodes by path and update properties. In order to do this, I pulled in Pantelis' patch series titled "[PATCH v2 0/5] of: dynamic: Changesets helpers & fixes" at Rob's request, and rebased it while taking two small review comments into account. Rob, I'd like this series to be merged in v4.17. As the changeset helpers are now a dependency, I'd need you to merge them early (ideally on top of v4.16-rc1) and provide a stable branch, or get your ack to merge them through Dave's tree if they don't conflict with what you have and will queue for v4.17. This version also drops the small fix to the Porter board device tree that has been queued for v4.17 already. Compared to v2, the biggest change is in patch 3/4. Following Rob's and Frank's reviews it was clear that modifying the unflattened DT structure of the overlay before applying it wasn't popular. I have thus decided to use one overlay source per SoC to move as much of the DT changes to the overlay as possible, and only perform manual modifications (that are still needed as some of the information is board-specific) on the system DT after applying the overlay. As a result the overlay is parsed and applied without being modified. Compared to v1, this series update the r8a7792 and r8a7794 device tree sources and incorporate review feedback as described by the changelogs of individual patches. Laurent Pinchart (4): dt-bindings: display: renesas: Add R-Car LVDS encoder DT bindings dt-bindings: display: renesas: Deprecate LVDS support in the DU bindings drm: rcar-du: Fix legacy DT to create LVDS encoder nodes drm: rcar-du: Convert LVDS encoder code to bridge driver .../bindings/display/bridge/renesas,lvds.txt | 56 +++ .../devicetree/bindings/display/renesas,du.txt | 31 +- MAINTAINERS | 1 + drivers/gpu/drm/rcar-du/Kconfig | 6 +- drivers/gpu/drm/rcar-du/Makefile | 10 +- drivers/gpu/drm/rcar-du/rcar_du_drv.c | 21 +- drivers/gpu/drm/rcar-du/rcar_du_drv.h | 5 - drivers/gpu/drm/rcar-du/rcar_du_encoder.c | 175 +------ drivers/gpu/drm/rcar-du/rcar_du_encoder.h | 12 - drivers/gpu/drm/rcar-du/rcar_du_kms.c | 14 +- drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c | 93 ---- drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h | 24 - drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c | 238 ---------- drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.h | 64 --- drivers/gpu/drm/rcar-du/rcar_du_of.c | 342 ++++++++++++++ drivers/gpu/drm/rcar-du/rcar_du_of.h | 20 + .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts | 79 ++++ .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts | 53 +++ .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts | 53 +++ .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts | 53 +++ .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts | 53 +++ drivers/gpu/drm/rcar-du/rcar_lvds.c | 524 +++++++++++++++++++++ 22 files changed, 1290 insertions(+), 637 deletions(-) create mode 100644 Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt delete mode 100644 drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c delete mode 100644 drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h delete mode 100644 drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c delete mode 100644 drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.h create mode 100644 drivers/gpu/drm/rcar-du/rcar_du_of.c create mode 100644 drivers/gpu/drm/rcar-du/rcar_du_of.h create mode 100644 drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts create mode 100644 drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts create mode 100644 drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts create mode 100644 drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts create mode 100644 drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts create mode 100644 drivers/gpu/drm/rcar-du/rcar_lvds.c -- Regards, Laurent Pinchart