On Wed, Feb 21, 2018 at 01:10:30AM +0200, Laurent Pinchart wrote: > 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 01/16 and 02/16 define new DT bindings for the LVDS > encoders, and deprecate their description inside the DU bindings. To retain > backward compatibility with existing DT, patches 03/16 to 08/16 then patch the > device tree at runtime to convert the legacy bindings to the new ones. > > With the DT side addressed, patch 09/16 converts the LVDS support code to a > separate bridge driver. Patches 11/16 to 16/16 then update all the device tree > sources to the new DU and LVDS encoders bindings. > > I decided to go for live DT patching in patch 08/16 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. > > 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 03/16. 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 (11): > 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 > ARM: dts: r8a7790: Convert to new LVDS DT bindings > ARM: dts: r8a7791: Convert to new LVDS DT bindings > ARM: dts: r8a7792: Convert to new DU DT bindings > ARM: dts: r8a7793: Convert to new LVDS DT bindings > ARM: dts: r8a7794: Convert to new DU DT bindings > arm64: dts: renesas: r8a7795: Convert to new LVDS DT bindings > arm64: dts: renesas: r8a7796: Convert to new LVDS DT bindings I have marked the dts patches above as deferred as they depend on the driver changes not to cause a regression. Please repost them or otherwise ping me once the driver dependencies are present in an rc release. I am assuming that the other patches in this series are not targeted at the renesas tree. > > Pantelis Antoniou (5): > of: dynamic: Add __of_node_dupv() > of: changesets: Introduce changeset helper methods > of: changeset: Add of_changeset_node_move method > of: unittest: changeset helpers > i2c: demux: Use changeset helpers for clarity ...
