Hi Simon, (Reducing the CC list as this became a Renesas-specific issue) On Wednesday, 21 February 2018 18:39:25 EEST Simon Horman wrote: > 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. The driver changes have made it to v4.17-rc1. Is it too late for v4.18 ? > I am assuming that the other patches in this series are not targeted > at the renesas tree. That's correct. > > 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 > > ... -- Regards, Laurent Pinchart
