[PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Laurent Pinchart]

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

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

 .../bindings/display/bridge/renesas,lvds.txt       |  56 +++
 .../devicetree/bindings/display/renesas,du.txt     |  31 +-
 MAINTAINERS                                        |   1 +
 arch/arm/boot/dts/r8a7790-lager.dts                |  22 +-
 arch/arm/boot/dts/r8a7790.dtsi                     |  64 ++-
 arch/arm/boot/dts/r8a7791-koelsch.dts              |  10 +-
 arch/arm/boot/dts/r8a7791-porter.dts               |  16 +-
 arch/arm/boot/dts/r8a7791.dtsi                     |  36 +-
 arch/arm/boot/dts/r8a7792.dtsi                     |   1 -
 arch/arm/boot/dts/r8a7793-gose.dts                 |  10 +-
 arch/arm/boot/dts/r8a7793.dtsi                     |  37 +-
 arch/arm/boot/dts/r8a7794.dtsi                     |   1 -
 .../boot/dts/renesas/r8a7795-es1-salvator-x.dts    |   3 +-
 arch/arm64/boot/dts/renesas/r8a7795-h3ulcb.dts     |   3 +-
 arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts |   3 +-
 .../arm64/boot/dts/renesas/r8a7795-salvator-xs.dts |   3 +-
 arch/arm64/boot/dts/renesas/r8a7795.dtsi           |  36 +-
 arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts     |   3 +-
 arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts |   3 +-
 arch/arm64/boot/dts/renesas/r8a7796.dtsi           |  36 +-
 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               | 307 ++++++++++++
 drivers/gpu/drm/rcar-du/rcar_du_of.h               |  20 +
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts    |  81 ++++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts    |  55 +++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts    |  55 +++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts    |  55 +++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts    |  55 +++
 drivers/gpu/drm/rcar-du/rcar_lvds.c                | 524 +++++++++++++++++++++
 drivers/i2c/muxes/i2c-demux-pinctrl.c              |  12 +-
 drivers/of/dynamic.c                               | 317 ++++++++++++-
 drivers/of/unittest.c                              |  54 +++
 include/linux/of.h                                 | 337 +++++++++++++
 43 files changed, 2199 insertions(+), 710 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

[PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Laurent Pinchart]

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

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

 .../bindings/display/bridge/renesas,lvds.txt       |  56 +++
 .../devicetree/bindings/display/renesas,du.txt     |  31 +-
 MAINTAINERS                                        |   1 +
 arch/arm/boot/dts/r8a7790-lager.dts                |  22 +-
 arch/arm/boot/dts/r8a7790.dtsi                     |  64 ++-
 arch/arm/boot/dts/r8a7791-koelsch.dts              |  10 +-
 arch/arm/boot/dts/r8a7791-porter.dts               |  16 +-
 arch/arm/boot/dts/r8a7791.dtsi                     |  36 +-
 arch/arm/boot/dts/r8a7792.dtsi                     |   1 -
 arch/arm/boot/dts/r8a7793-gose.dts                 |  10 +-
 arch/arm/boot/dts/r8a7793.dtsi                     |  37 +-
 arch/arm/boot/dts/r8a7794.dtsi                     |   1 -
 .../boot/dts/renesas/r8a7795-es1-salvator-x.dts    |   3 +-
 arch/arm64/boot/dts/renesas/r8a7795-h3ulcb.dts     |   3 +-
 arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts |   3 +-
 .../arm64/boot/dts/renesas/r8a7795-salvator-xs.dts |   3 +-
 arch/arm64/boot/dts/renesas/r8a7795.dtsi           |  36 +-
 arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts     |   3 +-
 arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts |   3 +-
 arch/arm64/boot/dts/renesas/r8a7796.dtsi           |  36 +-
 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               | 307 ++++++++++++
 drivers/gpu/drm/rcar-du/rcar_du_of.h               |  20 +
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts    |  81 ++++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts    |  55 +++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts    |  55 +++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts    |  55 +++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts    |  55 +++
 drivers/gpu/drm/rcar-du/rcar_lvds.c                | 524 +++++++++++++++++++++
 drivers/i2c/muxes/i2c-demux-pinctrl.c              |  12 +-
 drivers/of/dynamic.c                               | 317 ++++++++++++-
 drivers/of/unittest.c                              |  54 +++
 include/linux/of.h                                 | 337 +++++++++++++
 43 files changed, 2199 insertions(+), 710 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

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v4 01/16] dt-bindings: display: renesas: Add R-Car LVDS encoder DT bindings

[Laurent Pinchart]

The Renesas R-Car Gen2 and Gen3 SoCs have internal LVDS encoders. Add
corresponding device tree bindings.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
Changes since v1:

- Move the SoC name before the IP name in compatible strings
- Rename parallel input to parallel RGB input
- Fixed "renesas,r8a7743-lvds" description
- Document the resets property
- Fixed typo
---
 .../bindings/display/bridge/renesas,lvds.txt       | 56 ++++++++++++++++++++++
 MAINTAINERS                                        |  1 +
 2 files changed, 57 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt

diff --git a/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
new file mode 100644
index 000000000000..2b19ce51ec07
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
@@ -0,0 +1,56 @@
+Renesas R-Car LVDS Encoder
+==========================
+
+These DT bindings describe the LVDS encoder embedded in the Renesas R-Car
+Gen2, R-Car Gen3 and RZ/G SoCs.
+
+Required properties:
+
+- compatible : Shall contain one of
+  - "renesas,r8a7743-lvds" for R8A7743 (RZ/G1M) compatible LVDS encoders
+  - "renesas,r8a7790-lvds" for R8A7790 (R-Car H2) compatible LVDS encoders
+  - "renesas,r8a7791-lvds" for R8A7791 (R-Car M2-W) compatible LVDS encoders
+  - "renesas,r8a7793-lvds" for R8A7791 (R-Car M2-N) compatible LVDS encoders
+  - "renesas,r8a7795-lvds" for R8A7795 (R-Car H3) compatible LVDS encoders
+  - "renesas,r8a7796-lvds" for R8A7796 (R-Car M3-W) compatible LVDS encoders
+
+- reg: Base address and length for the memory-mapped registers
+- clocks: A phandle + clock-specifier pair for the functional clock
+- resets: A phandle + reset specifier for the module reset
+
+Required nodes:
+
+The LVDS encoder has two video ports. Their connections are modelled using the
+OF graph bindings specified in Documentation/devicetree/bindings/graph.txt.
+
+- Video port 0 corresponds to the parallel RGB input
+- Video port 1 corresponds to the LVDS output
+
+Each port shall have a single endpoint.
+
+
+Example:
+
+	lvds0: lvds@feb90000 {
+		compatible = "renesas,r8a7790-lvds";
+		reg = <0 0xfeb90000 0 0x1c>;
+		clocks = <&cpg CPG_MOD 726>;
+		resets = <&cpg 726>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				lvds0_in: endpoint {
+					remote-endpoint = <&du_out_lvds0>;
+				};
+			};
+			port@1 {
+				reg = <1>;
+				lvds0_out: endpoint {
+				};
+			};
+		};
+	};
diff --git a/MAINTAINERS b/MAINTAINERS
index 2afba909724c..13c8ec11135a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4744,6 +4744,7 @@ F:	drivers/gpu/drm/rcar-du/
 F:	drivers/gpu/drm/shmobile/
 F:	include/linux/platform_data/shmob_drm.h
 F:	Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.txt
+F:	Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
 F:	Documentation/devicetree/bindings/display/renesas,du.txt
 
 DRM DRIVERS FOR ROCKCHIP
-- 
Regards,

Laurent Pinchart

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v4 01/16] dt-bindings: display: renesas: Add R-Car LVDS encoder DT bindings

[Laurent Pinchart]

The Renesas R-Car Gen2 and Gen3 SoCs have internal LVDS encoders. Add
corresponding device tree bindings.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
Changes since v1:

- Move the SoC name before the IP name in compatible strings
- Rename parallel input to parallel RGB input
- Fixed "renesas,r8a7743-lvds" description
- Document the resets property
- Fixed typo
---
 .../bindings/display/bridge/renesas,lvds.txt       | 56 ++++++++++++++++++++++
 MAINTAINERS                                        |  1 +
 2 files changed, 57 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt

diff --git a/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
new file mode 100644
index 000000000000..2b19ce51ec07
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
@@ -0,0 +1,56 @@
+Renesas R-Car LVDS Encoder
+==========================
+
+These DT bindings describe the LVDS encoder embedded in the Renesas R-Car
+Gen2, R-Car Gen3 and RZ/G SoCs.
+
+Required properties:
+
+- compatible : Shall contain one of
+  - "renesas,r8a7743-lvds" for R8A7743 (RZ/G1M) compatible LVDS encoders
+  - "renesas,r8a7790-lvds" for R8A7790 (R-Car H2) compatible LVDS encoders
+  - "renesas,r8a7791-lvds" for R8A7791 (R-Car M2-W) compatible LVDS encoders
+  - "renesas,r8a7793-lvds" for R8A7791 (R-Car M2-N) compatible LVDS encoders
+  - "renesas,r8a7795-lvds" for R8A7795 (R-Car H3) compatible LVDS encoders
+  - "renesas,r8a7796-lvds" for R8A7796 (R-Car M3-W) compatible LVDS encoders
+
+- reg: Base address and length for the memory-mapped registers
+- clocks: A phandle + clock-specifier pair for the functional clock
+- resets: A phandle + reset specifier for the module reset
+
+Required nodes:
+
+The LVDS encoder has two video ports. Their connections are modelled using the
+OF graph bindings specified in Documentation/devicetree/bindings/graph.txt.
+
+- Video port 0 corresponds to the parallel RGB input
+- Video port 1 corresponds to the LVDS output
+
+Each port shall have a single endpoint.
+
+
+Example:
+
+	lvds0: lvds@feb90000 {
+		compatible = "renesas,r8a7790-lvds";
+		reg = <0 0xfeb90000 0 0x1c>;
+		clocks = <&cpg CPG_MOD 726>;
+		resets = <&cpg 726>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				lvds0_in: endpoint {
+					remote-endpoint = <&du_out_lvds0>;
+				};
+			};
+			port@1 {
+				reg = <1>;
+				lvds0_out: endpoint {
+				};
+			};
+		};
+	};
diff --git a/MAINTAINERS b/MAINTAINERS
index 2afba909724c..13c8ec11135a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4744,6 +4744,7 @@ F:	drivers/gpu/drm/rcar-du/
 F:	drivers/gpu/drm/shmobile/
 F:	include/linux/platform_data/shmob_drm.h
 F:	Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.txt
+F:	Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
 F:	Documentation/devicetree/bindings/display/renesas,du.txt
 
 DRM DRIVERS FOR ROCKCHIP
-- 
Regards,

Laurent Pinchart

[PATCH v4 02/16] dt-bindings: display: renesas: Deprecate LVDS support in the DU bindings

[Laurent Pinchart]

The internal LVDS encoders now have their own DT bindings, representing
them as part of the DU is deprecated.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
Changes since v1:

- Remove the LVDS reg range from the example
- Remove the reg-names property
---
 .../devicetree/bindings/display/renesas,du.txt     | 31 ++++++++--------------
 1 file changed, 11 insertions(+), 20 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/renesas,du.txt b/Documentation/devicetree/bindings/display/renesas,du.txt
index cd48aba3bc8c..e79cf9b0ad38 100644
--- a/Documentation/devicetree/bindings/display/renesas,du.txt
+++ b/Documentation/devicetree/bindings/display/renesas,du.txt
@@ -14,12 +14,7 @@ Required Properties:
     - "renesas,du-r8a7795" for R8A7795 (R-Car H3) compatible DU
     - "renesas,du-r8a7796" for R8A7796 (R-Car M3-W) compatible DU
 
-  - reg: A list of base address and length of each memory resource, one for
-    each entry in the reg-names property.
-  - reg-names: Name of the memory resources. The DU requires one memory
-    resource for the DU core (named "du") and one memory resource for each
-    LVDS encoder (named "lvds.x" with "x" being the LVDS controller numerical
-    index).
+  - reg: the memory-mapped I/O registers base address and length
 
   - interrupt-parent: phandle of the parent interrupt controller.
   - interrupts: Interrupt specifiers for the DU interrupts.
@@ -29,14 +24,13 @@ Required Properties:
   - clock-names: Name of the clocks. This property is model-dependent.
     - R8A7779 uses a single functional clock. The clock doesn't need to be
       named.
-    - All other DU instances use one functional clock per channel and one
-      clock per LVDS encoder (if available). The functional clocks must be
-      named "du.x" with "x" being the channel numerical index. The LVDS clocks
-      must be named "lvds.x" with "x" being the LVDS encoder numerical index.
-    - In addition to the functional and encoder clocks, all DU versions also
-      support externally supplied pixel clocks. Those clocks are optional.
-      When supplied they must be named "dclkin.x" with "x" being the input
-      clock numerical index.
+    - All other DU instances use one functional clock per channel The
+      functional clocks must be named "du.x" with "x" being the channel
+      numerical index.
+    - In addition to the functional clocks, all DU versions also support
+      externally supplied pixel clocks. Those clocks are optional. When
+      supplied they must be named "dclkin.x" with "x" being the input clock
+      numerical index.
 
   - vsps: A list of phandle and channel index tuples to the VSPs that handle
     the memory interfaces for the DU channels. The phandle identifies the VSP
@@ -69,9 +63,7 @@ Example: R8A7795 (R-Car H3) ES2.0 DU
 
 	du: display@feb00000 {
 		compatible = "renesas,du-r8a7795";
-		reg = <0 0xfeb00000 0 0x80000>,
-		      <0 0xfeb90000 0 0x14>;
-		reg-names = "du", "lvds.0";
+		reg = <0 0xfeb00000 0 0x80000>;
 		interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 269 IRQ_TYPE_LEVEL_HIGH>,
@@ -79,9 +71,8 @@ Example: R8A7795 (R-Car H3) ES2.0 DU
 		clocks = <&cpg CPG_MOD 724>,
 			 <&cpg CPG_MOD 723>,
 			 <&cpg CPG_MOD 722>,
-			 <&cpg CPG_MOD 721>,
-			 <&cpg CPG_MOD 727>;
-		clock-names = "du.0", "du.1", "du.2", "du.3", "lvds.0";
+			 <&cpg CPG_MOD 721>;
+		clock-names = "du.0", "du.1", "du.2", "du.3";
 		vsps = <&vspd0 0>, <&vspd1 0>, <&vspd2 0>, <&vspd0 1>;
 
 		ports {
-- 
Regards,

Laurent Pinchart

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v4 02/16] dt-bindings: display: renesas: Deprecate LVDS support in the DU bindings

[Laurent Pinchart]

The internal LVDS encoders now have their own DT bindings, representing
them as part of the DU is deprecated.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
Changes since v1:

- Remove the LVDS reg range from the example
- Remove the reg-names property
---
 .../devicetree/bindings/display/renesas,du.txt     | 31 ++++++++--------------
 1 file changed, 11 insertions(+), 20 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/renesas,du.txt b/Documentation/devicetree/bindings/display/renesas,du.txt
index cd48aba3bc8c..e79cf9b0ad38 100644
--- a/Documentation/devicetree/bindings/display/renesas,du.txt
+++ b/Documentation/devicetree/bindings/display/renesas,du.txt
@@ -14,12 +14,7 @@ Required Properties:
     - "renesas,du-r8a7795" for R8A7795 (R-Car H3) compatible DU
     - "renesas,du-r8a7796" for R8A7796 (R-Car M3-W) compatible DU
 
-  - reg: A list of base address and length of each memory resource, one for
-    each entry in the reg-names property.
-  - reg-names: Name of the memory resources. The DU requires one memory
-    resource for the DU core (named "du") and one memory resource for each
-    LVDS encoder (named "lvds.x" with "x" being the LVDS controller numerical
-    index).
+  - reg: the memory-mapped I/O registers base address and length
 
   - interrupt-parent: phandle of the parent interrupt controller.
   - interrupts: Interrupt specifiers for the DU interrupts.
@@ -29,14 +24,13 @@ Required Properties:
   - clock-names: Name of the clocks. This property is model-dependent.
     - R8A7779 uses a single functional clock. The clock doesn't need to be
       named.
-    - All other DU instances use one functional clock per channel and one
-      clock per LVDS encoder (if available). The functional clocks must be
-      named "du.x" with "x" being the channel numerical index. The LVDS clocks
-      must be named "lvds.x" with "x" being the LVDS encoder numerical index.
-    - In addition to the functional and encoder clocks, all DU versions also
-      support externally supplied pixel clocks. Those clocks are optional.
-      When supplied they must be named "dclkin.x" with "x" being the input
-      clock numerical index.
+    - All other DU instances use one functional clock per channel The
+      functional clocks must be named "du.x" with "x" being the channel
+      numerical index.
+    - In addition to the functional clocks, all DU versions also support
+      externally supplied pixel clocks. Those clocks are optional. When
+      supplied they must be named "dclkin.x" with "x" being the input clock
+      numerical index.
 
   - vsps: A list of phandle and channel index tuples to the VSPs that handle
     the memory interfaces for the DU channels. The phandle identifies the VSP
@@ -69,9 +63,7 @@ Example: R8A7795 (R-Car H3) ES2.0 DU
 
 	du: display@feb00000 {
 		compatible = "renesas,du-r8a7795";
-		reg = <0 0xfeb00000 0 0x80000>,
-		      <0 0xfeb90000 0 0x14>;
-		reg-names = "du", "lvds.0";
+		reg = <0 0xfeb00000 0 0x80000>;
 		interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 269 IRQ_TYPE_LEVEL_HIGH>,
@@ -79,9 +71,8 @@ Example: R8A7795 (R-Car H3) ES2.0 DU
 		clocks = <&cpg CPG_MOD 724>,
 			 <&cpg CPG_MOD 723>,
 			 <&cpg CPG_MOD 722>,
-			 <&cpg CPG_MOD 721>,
-			 <&cpg CPG_MOD 727>;
-		clock-names = "du.0", "du.1", "du.2", "du.3", "lvds.0";
+			 <&cpg CPG_MOD 721>;
+		clock-names = "du.0", "du.1", "du.2", "du.3";
 		vsps = <&vspd0 0>, <&vspd1 0>, <&vspd2 0>, <&vspd0 1>;
 
 		ports {
-- 
Regards,

Laurent Pinchart

[PATCH v4 03/16] of: dynamic: Add __of_node_dupv()

[Laurent Pinchart]

From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>

Add an __of_node_dupv() private method and make __of_node_dup() use it.
This is required for the subsequent changeset accessors which will
make use of it.

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/of/dynamic.c | 29 +++++++++++++++++++++++------
 1 file changed, 23 insertions(+), 6 deletions(-)

diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
index 7bb33d22b4e2..4ffd04925fdf 100644
--- a/drivers/of/dynamic.c
+++ b/drivers/of/dynamic.c
@@ -382,8 +382,9 @@ struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags)
 }
 
 /**
- * __of_node_dup() - Duplicate or create an empty device node dynamically.
- * @fmt: Format string (plus vargs) for new full name of the device node
+ * __of_node_dupv() - Duplicate or create an empty device node dynamically.
+ * @fmt: Format string for new full name of the device node
+ * @vargs: va_list containing the arugments for the node full name
  *
  * Create an device tree node, either by duplicating an empty node or by allocating
  * an empty one suitable for further modification.  The node data are
@@ -391,17 +392,15 @@ struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags)
  * OF_DETACHED bits set. Returns the newly allocated node or NULL on out of
  * memory error.
  */
-struct device_node *__of_node_dup(const struct device_node *np, const char *fmt, ...)
+struct device_node *__of_node_dupv(const struct device_node *np,
+		const char *fmt, va_list vargs)
 {
-	va_list vargs;
 	struct device_node *node;
 
 	node = kzalloc(sizeof(*node), GFP_KERNEL);
 	if (!node)
 		return NULL;
-	va_start(vargs, fmt);
 	node->full_name = kvasprintf(GFP_KERNEL, fmt, vargs);
-	va_end(vargs);
 	if (!node->full_name) {
 		kfree(node);
 		return NULL;
@@ -433,6 +432,24 @@ struct device_node *__of_node_dup(const struct device_node *np, const char *fmt,
 	return NULL;
 }
 
+/**
+ * __of_node_dup() - Duplicate or create an empty device node dynamically.
+ * @fmt: Format string (plus vargs) for new full name of the device node
+ *
+ * See: __of_node_dupv()
+ */
+struct device_node *__of_node_dup(const struct device_node *np,
+		const char *fmt, ...)
+{
+	va_list vargs;
+	struct device_node *node;
+
+	va_start(vargs, fmt);
+	node = __of_node_dupv(np, fmt, vargs);
+	va_end(vargs);
+	return node;
+}
+
 static void __of_changeset_entry_destroy(struct of_changeset_entry *ce)
 {
 	of_node_put(ce->np);
-- 
Regards,

Laurent Pinchart

[PATCH v4 03/16] of: dynamic: Add __of_node_dupv()

[Laurent Pinchart]

From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>

Add an __of_node_dupv() private method and make __of_node_dup() use it.
This is required for the subsequent changeset accessors which will
make use of it.

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/of/dynamic.c | 29 +++++++++++++++++++++++------
 1 file changed, 23 insertions(+), 6 deletions(-)

diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
index 7bb33d22b4e2..4ffd04925fdf 100644
--- a/drivers/of/dynamic.c
+++ b/drivers/of/dynamic.c
@@ -382,8 +382,9 @@ struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags)
 }
 
 /**
- * __of_node_dup() - Duplicate or create an empty device node dynamically.
- * @fmt: Format string (plus vargs) for new full name of the device node
+ * __of_node_dupv() - Duplicate or create an empty device node dynamically.
+ * @fmt: Format string for new full name of the device node
+ * @vargs: va_list containing the arugments for the node full name
  *
  * Create an device tree node, either by duplicating an empty node or by allocating
  * an empty one suitable for further modification.  The node data are
@@ -391,17 +392,15 @@ struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags)
  * OF_DETACHED bits set. Returns the newly allocated node or NULL on out of
  * memory error.
  */
-struct device_node *__of_node_dup(const struct device_node *np, const char *fmt, ...)
+struct device_node *__of_node_dupv(const struct device_node *np,
+		const char *fmt, va_list vargs)
 {
-	va_list vargs;
 	struct device_node *node;
 
 	node = kzalloc(sizeof(*node), GFP_KERNEL);
 	if (!node)
 		return NULL;
-	va_start(vargs, fmt);
 	node->full_name = kvasprintf(GFP_KERNEL, fmt, vargs);
-	va_end(vargs);
 	if (!node->full_name) {
 		kfree(node);
 		return NULL;
@@ -433,6 +432,24 @@ struct device_node *__of_node_dup(const struct device_node *np, const char *fmt,
 	return NULL;
 }
 
+/**
+ * __of_node_dup() - Duplicate or create an empty device node dynamically.
+ * @fmt: Format string (plus vargs) for new full name of the device node
+ *
+ * See: __of_node_dupv()
+ */
+struct device_node *__of_node_dup(const struct device_node *np,
+		const char *fmt, ...)
+{
+	va_list vargs;
+	struct device_node *node;
+
+	va_start(vargs, fmt);
+	node = __of_node_dupv(np, fmt, vargs);
+	va_end(vargs);
+	return node;
+}
+
 static void __of_changeset_entry_destroy(struct of_changeset_entry *ce)
 {
 	of_node_put(ce->np);
-- 
Regards,

Laurent Pinchart

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v4 04/16] of: changesets: Introduce changeset helper methods

[Laurent Pinchart]

From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>

Changesets are very powerful, but the lack of a helper API
makes using them cumbersome. Introduce a simple copy based
API that makes things considerably easier.

To wit, adding a property using the raw API.

	struct property *prop;
	prop = kzalloc(sizeof(*prop)), GFP_KERNEL);
	prop->name = kstrdup("compatible");
	prop->value = kstrdup("foo,bar");
	prop->length = strlen(prop->value) + 1;
	of_changeset_add_property(ocs, np, prop);

while using the helper API

	of_changeset_add_property_string(ocs, np, "compatible",
			"foo,bar");

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
[Fixed memory leak in __of_changeset_add_update_property_copy()]
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/of/dynamic.c | 222 ++++++++++++++++++++++++++++++++++
 include/linux/of.h   | 328 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 550 insertions(+)

diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
index 4ffd04925fdf..85e722ed8631 100644
--- a/drivers/of/dynamic.c
+++ b/drivers/of/dynamic.c
@@ -910,3 +910,225 @@ int of_changeset_action(struct of_changeset *ocs, unsigned long action,
 	return 0;
 }
 EXPORT_SYMBOL_GPL(of_changeset_action);
+
+/* changeset helpers */
+
+/**
+ * of_changeset_create_device_node - Create an empty device node
+ *
+ * @ocs:	changeset pointer
+ * @parent:	parent device node
+ * @fmt:	format string for the node's full_name
+ * @args:	argument list for the format string
+ *
+ * Create an empty device node, marking it as detached and allocated.
+ *
+ * Returns a device node on success, an error encoded pointer otherwise
+ */
+struct device_node *of_changeset_create_device_nodev(
+	struct of_changeset *ocs, struct device_node *parent,
+	const char *fmt, va_list vargs)
+{
+	struct device_node *node;
+
+	node = __of_node_dupv(NULL, fmt, vargs);
+	if (!node)
+		return ERR_PTR(-ENOMEM);
+
+	node->parent = parent;
+	return node;
+}
+EXPORT_SYMBOL_GPL(of_changeset_create_device_nodev);
+
+/**
+ * of_changeset_create_device_node - Create an empty device node
+ *
+ * @ocs:	changeset pointer
+ * @parent:	parent device node
+ * @fmt:	Format string for the node's full_name
+ * ...		Arguments
+ *
+ * Create an empty device node, marking it as detached and allocated.
+ *
+ * Returns a device node on success, an error encoded pointer otherwise
+ */
+__printf(3, 4) struct device_node *
+of_changeset_create_device_node(struct of_changeset *ocs,
+	struct device_node *parent, const char *fmt, ...)
+{
+	va_list vargs;
+	struct device_node *node;
+
+	va_start(vargs, fmt);
+	node = of_changeset_create_device_nodev(ocs, parent, fmt, vargs);
+	va_end(vargs);
+	return node;
+}
+EXPORT_SYMBOL_GPL(of_changeset_create_device_node);
+
+/**
+ * __of_changeset_add_property_copy - Create/update a new property copying
+ *                                    name & value
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @value:	pointer to the value data
+ * @length:	length of the value in bytes
+ * @update:	True on update operation
+ *
+ * Adds/updates a property to the changeset by making copies of the name & value
+ * entries. The @update parameter controls whether an add or update takes place.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+int __of_changeset_add_update_property_copy(struct of_changeset *ocs,
+		struct device_node *np, const char *name, const void *value,
+		int length, bool update)
+{
+	struct property *prop;
+	int ret = -ENOMEM;
+
+	prop = kzalloc(sizeof(*prop), GFP_KERNEL);
+	if (!prop)
+		return -ENOMEM;
+
+	prop->name = kstrdup(name, GFP_KERNEL);
+	if (!prop->name)
+		goto out_err;
+
+	/*
+	 * NOTE: There is no check for zero length value.
+	 * In case of a boolean property, this will allocate a value
+	 * of zero bytes. We do this to work around the use
+	 * of of_get_property() calls on boolean values.
+	 */
+	prop->value = kmemdup(value, length, GFP_KERNEL);
+	if (!prop->value)
+		goto out_err;
+
+	of_property_set_flag(prop, OF_DYNAMIC);
+
+	prop->length = length;
+
+	if (!update)
+		ret = of_changeset_add_property(ocs, np, prop);
+	else
+		ret = of_changeset_update_property(ocs, np, prop);
+
+	if (!ret)
+		return 0;
+
+out_err:
+	kfree(prop->value);
+	kfree(prop->name);
+	kfree(prop);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(__of_changeset_add_update_property_copy);
+
+/**
+ * of_changeset_add_property_stringf - Create a new formatted string property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @fmt:	format of string property
+ * ...		arguments of the format string
+ *
+ * Adds a string property to the changeset by making copies of the name
+ * and the formatted value.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+__printf(4, 5) int of_changeset_add_property_stringf(
+		struct of_changeset *ocs, struct device_node *np,
+		const char *name, const char *fmt, ...)
+{
+	va_list vargs;
+	int ret;
+
+	va_start(vargs, fmt);
+	ret = __of_changeset_add_update_property_stringv(ocs, np, name, fmt,
+			vargs, false);
+	va_end(vargs);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(of_changeset_add_property_stringf);
+
+/**
+ * of_changeset_update_property_stringf - Update formatted string property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @fmt:	format of string property
+ * ...		arguments of the format string
+ *
+ * Updates a string property to the changeset by making copies of the name
+ * and the formatted value.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+int of_changeset_update_property_stringf(
+	struct of_changeset *ocs, struct device_node *np,
+	const char *name, const char *fmt, ...)
+{
+	va_list vargs;
+	int ret;
+
+	va_start(vargs, fmt);
+	ret = __of_changeset_add_update_property_stringv(ocs, np, name, fmt,
+			vargs, true);
+	va_end(vargs);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(of_changeset_update_property_stringf);
+
+/**
+ * __of_changeset_add_update_property_string_list - Create/update a string
+ *                                                  list property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @strs:	pointer to the string list
+ * @count:	string count
+ * @update:	True on update operation
+ *
+ * Adds a string list property to the changeset.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+int __of_changeset_add_update_property_string_list(
+		struct of_changeset *ocs, struct device_node *np,
+		const char *name, const char **strs, int count, bool update)
+{
+	int total = 0, i, ret;
+	char *value, *s;
+
+	for (i = 0; i < count; i++) {
+		/* check if  it's NULL */
+		if (!strs[i])
+			return -EINVAL;
+		total += strlen(strs[i]) + 1;
+	}
+
+	value = kmalloc(total, GFP_KERNEL);
+	if (!value)
+		return -ENOMEM;
+
+	for (i = 0, s = value; i < count; i++) {
+		/* no need to check for NULL, check above */
+		strcpy(s, strs[i]);
+		s += strlen(strs[i]) + 1;
+	}
+
+	ret = __of_changeset_add_update_property_copy(ocs, np, name, value,
+			total, update);
+
+	kfree(value);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(__of_changeset_add_update_property_string_list);
diff --git a/include/linux/of.h b/include/linux/of.h
index da1ee95241c1..7aef555f9bc2 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -1266,6 +1266,8 @@ enum of_reconfig_change {
 };
 
 #ifdef CONFIG_OF_DYNAMIC
+#include <linux/slab.h>
+
 extern int of_reconfig_notifier_register(struct notifier_block *);
 extern int of_reconfig_notifier_unregister(struct notifier_block *);
 extern int of_reconfig_notify(unsigned long, struct of_reconfig_data *rd);
@@ -1309,6 +1311,23 @@ static inline int of_changeset_update_property(struct of_changeset *ocs,
 {
 	return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop);
 }
+
+struct device_node *of_changeset_create_device_nodev(
+	struct of_changeset *ocs, struct device_node *parent,
+	const char *fmt, va_list vargs);
+
+__printf(3, 4) struct device_node *
+of_changeset_create_device_node(struct of_changeset *ocs,
+	struct device_node *parent, const char *fmt, ...);
+
+int __of_changeset_add_update_property_copy(struct of_changeset *ocs,
+		struct device_node *np, const char *name, const void *value,
+		int length, bool update);
+
+int __of_changeset_add_update_property_string_list(
+		struct of_changeset *ocs, struct device_node *np,
+		const char *name, const char **strs, int count, bool update);
+
 #else /* CONFIG_OF_DYNAMIC */
 static inline int of_reconfig_notifier_register(struct notifier_block *nb)
 {
@@ -1328,8 +1347,317 @@ static inline int of_reconfig_get_state_change(unsigned long action,
 {
 	return -EINVAL;
 }
+
+static inline struct device_node *of_changeset_create_device_nodev(
+	struct of_changeset *ocs, struct device_node *parent,
+	const char *fmt, va_list vargs)
+{
+	return ERR_PTR(-EINVAL);
+}
+
+static inline __printf(3, 4) struct device_node *
+of_changeset_create_device_node(struct of_changeset *ocs,
+	struct device_node *parent, const char *fmt, ...)
+{
+	return ERR_PTR(-EINVAL);
+}
+
+static inline int __of_changeset_add_update_property_copy(
+	struct of_changeset *ocs, struct device_node *np,
+	const char *name, const void *value, int length, bool update)
+{
+	return -EINVAL;
+}
+
+static inline __printf(4, 5) int of_changeset_add_property_stringf(
+		struct of_changeset *ocs, struct device_node *np,
+		const char *name, const char *fmt, ...)
+{
+	return -EINVAL;
+}
+
+static inline int of_changeset_update_property_stringf(
+	struct of_changeset *ocs, struct device_node *np,
+	const char *name, const char *fmt, ...)
+{
+	return -EINVAL;
+}
+
+static inline int __of_changeset_add_update_property_string_list(
+		struct of_changeset *ocs, struct device_node *np,
+		const char *name, const char **strs, int count, bool update)
+{
+	return -EINVAL;
+}
+
 #endif /* CONFIG_OF_DYNAMIC */
 
+/**
+ * of_changeset_add_property_copy - Create a new property copying name & value
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @value:	pointer to the value data
+ * @length:	length of the value in bytes
+ *
+ * Adds a property to the changeset by making copies of the name & value
+ * entries.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_add_property_copy(struct of_changeset *ocs,
+	struct device_node *np, const char *name,
+	const void *value, int length)
+{
+	return __of_changeset_add_update_property_copy(ocs, np, name, value,
+			length, false);
+}
+
+/**
+ * of_changeset_update_property_copy - Update a property copying name & value
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @value:	pointer to the value data
+ * @length:	length of the value in bytes
+ *
+ * Update a property to the changeset by making copies of the name & value
+ * entries.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_update_property_copy(struct of_changeset *ocs,
+	struct device_node *np, const char *name,
+	const void *value, int length)
+{
+	return __of_changeset_add_update_property_copy(ocs, np, name, value,
+			length, true);
+}
+
+/**
+ * __of_changeset_add_update_property_string - Create/update a string property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @str:	string property value
+ * @update:	True on update operation
+ *
+ * Adds/updates a string property to the changeset by making copies of the name
+ * and the given value. The @update parameter controls whether an add or
+ * update takes place.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int __of_changeset_add_update_property_string(
+	struct of_changeset *ocs, struct device_node *np, const char *name,
+	const char *str, bool update)
+{
+	return __of_changeset_add_update_property_copy(ocs, np, name, str,
+			strlen(str) + 1, update);
+}
+
+/**
+ * __of_changeset_add_update_property_stringv - Create/update a formatted
+ *						string property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @fmt:	format of string property
+ * @vargs:	arguments of the format string
+ * @update:	True on update operation
+ *
+ * Adds/updates a string property to the changeset by making copies of the name
+ * and the formatted value. The @update parameter controls whether an add or
+ * update takes place.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int __of_changeset_add_update_property_stringv(
+	struct of_changeset *ocs, struct device_node *np, const char *name,
+	const char *fmt, va_list vargs, bool update)
+{
+	char *str;
+	int ret;
+
+	str = kvasprintf(GFP_KERNEL, fmt, vargs);
+	if (!str)
+		return -ENOMEM;
+	ret = __of_changeset_add_update_property_string(ocs, np, name, str,
+			update);
+	kfree(str);
+
+	return ret;
+}
+
+/**
+ * of_changeset_add_property_string_list - Create a new string list property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @strs:	pointer to the string list
+ * @count:	string count
+ *
+ * Adds a string list property to the changeset.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_add_property_string_list(
+	struct of_changeset *ocs, struct device_node *np, const char *name,
+	const char **strs, int count)
+{
+	return __of_changeset_add_update_property_string_list(ocs, np, name,
+			strs, count, false);
+}
+
+/**
+ * of_changeset_update_property_string_list - Update string list property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @strs:	pointer to the string list
+ * @count:	string count
+ *
+ * Updates a string list property to the changeset.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_update_property_string_list(
+	struct of_changeset *ocs, struct device_node *np,
+	const char *name, const char **strs, int count)
+{
+	return __of_changeset_add_update_property_string_list(ocs, np, name,
+			strs, count, true);
+}
+
+/**
+ * of_changeset_add_property_string - Adds a string property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @str:	string property
+ *
+ * Adds a string property to the changeset by making copies of the name
+ * and the string value.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_add_property_string(
+	struct of_changeset *ocs, struct device_node *np,
+	const char *name, const char *str)
+{
+	return __of_changeset_add_update_property_string(ocs, np, name, str,
+			false);
+}
+
+/**
+ * of_changeset_update_property_string - Update a string property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @str:	string property
+ *
+ * Updates a string property to the changeset by making copies of the name
+ * and the string value.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_update_property_string(
+	struct of_changeset *ocs, struct device_node *np,
+	const char *name, const char *str)
+{
+	return __of_changeset_add_update_property_string(ocs, np, name, str,
+			true);
+}
+
+/**
+ * of_changeset_add_property_u32 - Create a new u32 property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @val:	value in host endian format
+ *
+ * Adds a u32 property to the changeset.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_add_property_u32(struct of_changeset *ocs,
+		struct device_node *np, const char *name, u32 val)
+{
+	val = cpu_to_be32(val);
+	return __of_changeset_add_update_property_copy(ocs, np, name, &val,
+			sizeof(val), false);
+}
+
+/**
+ * of_changeset_update_property_u32 - Update u32 property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @val:	value in host endian format
+ *
+ * Updates a u32 property to the changeset.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_update_property_u32(
+	struct of_changeset *ocs, struct device_node *np,
+	const char *name, u32 val)
+{
+	val = cpu_to_be32(val);
+	return __of_changeset_add_update_property_copy(ocs, np, name, &val,
+			sizeof(val), true);
+}
+
+/**
+ * of_changeset_add_property_bool - Create a new u32 property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ *
+ * Adds a bool property to the changeset. Note that there is
+ * no option to set the value to false, since the property
+ * existing sets it to true.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_add_property_bool(
+	struct of_changeset *ocs, struct device_node *np, const char *name)
+{
+	return __of_changeset_add_update_property_copy(ocs, np, name, "", 0,
+			false);
+}
+
+/**
+ * of_changeset_update_property_bool - Update a bool property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ *
+ * Updates a property to the changeset. Note that there is
+ * no option to set the value to false, since the property
+ * existing sets it to true.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_update_property_bool(struct of_changeset *ocs,
+		struct device_node *np, const char *name)
+{
+	return __of_changeset_add_update_property_copy(ocs, np, name, "", 0,
+			true);
+}
+
 /**
  * of_device_is_system_power_controller - Tells if system-power-controller is found for device_node
  * @np: Pointer to the given device_node
-- 
Regards,

Laurent Pinchart

[PATCH v4 04/16] of: changesets: Introduce changeset helper methods

[Laurent Pinchart]

From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>

Changesets are very powerful, but the lack of a helper API
makes using them cumbersome. Introduce a simple copy based
API that makes things considerably easier.

To wit, adding a property using the raw API.

	struct property *prop;
	prop = kzalloc(sizeof(*prop)), GFP_KERNEL);
	prop->name = kstrdup("compatible");
	prop->value = kstrdup("foo,bar");
	prop->length = strlen(prop->value) + 1;
	of_changeset_add_property(ocs, np, prop);

while using the helper API

	of_changeset_add_property_string(ocs, np, "compatible",
			"foo,bar");

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
[Fixed memory leak in __of_changeset_add_update_property_copy()]
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/of/dynamic.c | 222 ++++++++++++++++++++++++++++++++++
 include/linux/of.h   | 328 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 550 insertions(+)

diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
index 4ffd04925fdf..85e722ed8631 100644
--- a/drivers/of/dynamic.c
+++ b/drivers/of/dynamic.c
@@ -910,3 +910,225 @@ int of_changeset_action(struct of_changeset *ocs, unsigned long action,
 	return 0;
 }
 EXPORT_SYMBOL_GPL(of_changeset_action);
+
+/* changeset helpers */
+
+/**
+ * of_changeset_create_device_node - Create an empty device node
+ *
+ * @ocs:	changeset pointer
+ * @parent:	parent device node
+ * @fmt:	format string for the node's full_name
+ * @args:	argument list for the format string
+ *
+ * Create an empty device node, marking it as detached and allocated.
+ *
+ * Returns a device node on success, an error encoded pointer otherwise
+ */
+struct device_node *of_changeset_create_device_nodev(
+	struct of_changeset *ocs, struct device_node *parent,
+	const char *fmt, va_list vargs)
+{
+	struct device_node *node;
+
+	node = __of_node_dupv(NULL, fmt, vargs);
+	if (!node)
+		return ERR_PTR(-ENOMEM);
+
+	node->parent = parent;
+	return node;
+}
+EXPORT_SYMBOL_GPL(of_changeset_create_device_nodev);
+
+/**
+ * of_changeset_create_device_node - Create an empty device node
+ *
+ * @ocs:	changeset pointer
+ * @parent:	parent device node
+ * @fmt:	Format string for the node's full_name
+ * ...		Arguments
+ *
+ * Create an empty device node, marking it as detached and allocated.
+ *
+ * Returns a device node on success, an error encoded pointer otherwise
+ */
+__printf(3, 4) struct device_node *
+of_changeset_create_device_node(struct of_changeset *ocs,
+	struct device_node *parent, const char *fmt, ...)
+{
+	va_list vargs;
+	struct device_node *node;
+
+	va_start(vargs, fmt);
+	node = of_changeset_create_device_nodev(ocs, parent, fmt, vargs);
+	va_end(vargs);
+	return node;
+}
+EXPORT_SYMBOL_GPL(of_changeset_create_device_node);
+
+/**
+ * __of_changeset_add_property_copy - Create/update a new property copying
+ *                                    name & value
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @value:	pointer to the value data
+ * @length:	length of the value in bytes
+ * @update:	True on update operation
+ *
+ * Adds/updates a property to the changeset by making copies of the name & value
+ * entries. The @update parameter controls whether an add or update takes place.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+int __of_changeset_add_update_property_copy(struct of_changeset *ocs,
+		struct device_node *np, const char *name, const void *value,
+		int length, bool update)
+{
+	struct property *prop;
+	int ret = -ENOMEM;
+
+	prop = kzalloc(sizeof(*prop), GFP_KERNEL);
+	if (!prop)
+		return -ENOMEM;
+
+	prop->name = kstrdup(name, GFP_KERNEL);
+	if (!prop->name)
+		goto out_err;
+
+	/*
+	 * NOTE: There is no check for zero length value.
+	 * In case of a boolean property, this will allocate a value
+	 * of zero bytes. We do this to work around the use
+	 * of of_get_property() calls on boolean values.
+	 */
+	prop->value = kmemdup(value, length, GFP_KERNEL);
+	if (!prop->value)
+		goto out_err;
+
+	of_property_set_flag(prop, OF_DYNAMIC);
+
+	prop->length = length;
+
+	if (!update)
+		ret = of_changeset_add_property(ocs, np, prop);
+	else
+		ret = of_changeset_update_property(ocs, np, prop);
+
+	if (!ret)
+		return 0;
+
+out_err:
+	kfree(prop->value);
+	kfree(prop->name);
+	kfree(prop);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(__of_changeset_add_update_property_copy);
+
+/**
+ * of_changeset_add_property_stringf - Create a new formatted string property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @fmt:	format of string property
+ * ...		arguments of the format string
+ *
+ * Adds a string property to the changeset by making copies of the name
+ * and the formatted value.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+__printf(4, 5) int of_changeset_add_property_stringf(
+		struct of_changeset *ocs, struct device_node *np,
+		const char *name, const char *fmt, ...)
+{
+	va_list vargs;
+	int ret;
+
+	va_start(vargs, fmt);
+	ret = __of_changeset_add_update_property_stringv(ocs, np, name, fmt,
+			vargs, false);
+	va_end(vargs);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(of_changeset_add_property_stringf);
+
+/**
+ * of_changeset_update_property_stringf - Update formatted string property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @fmt:	format of string property
+ * ...		arguments of the format string
+ *
+ * Updates a string property to the changeset by making copies of the name
+ * and the formatted value.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+int of_changeset_update_property_stringf(
+	struct of_changeset *ocs, struct device_node *np,
+	const char *name, const char *fmt, ...)
+{
+	va_list vargs;
+	int ret;
+
+	va_start(vargs, fmt);
+	ret = __of_changeset_add_update_property_stringv(ocs, np, name, fmt,
+			vargs, true);
+	va_end(vargs);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(of_changeset_update_property_stringf);
+
+/**
+ * __of_changeset_add_update_property_string_list - Create/update a string
+ *                                                  list property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @strs:	pointer to the string list
+ * @count:	string count
+ * @update:	True on update operation
+ *
+ * Adds a string list property to the changeset.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+int __of_changeset_add_update_property_string_list(
+		struct of_changeset *ocs, struct device_node *np,
+		const char *name, const char **strs, int count, bool update)
+{
+	int total = 0, i, ret;
+	char *value, *s;
+
+	for (i = 0; i < count; i++) {
+		/* check if  it's NULL */
+		if (!strs[i])
+			return -EINVAL;
+		total += strlen(strs[i]) + 1;
+	}
+
+	value = kmalloc(total, GFP_KERNEL);
+	if (!value)
+		return -ENOMEM;
+
+	for (i = 0, s = value; i < count; i++) {
+		/* no need to check for NULL, check above */
+		strcpy(s, strs[i]);
+		s += strlen(strs[i]) + 1;
+	}
+
+	ret = __of_changeset_add_update_property_copy(ocs, np, name, value,
+			total, update);
+
+	kfree(value);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(__of_changeset_add_update_property_string_list);
diff --git a/include/linux/of.h b/include/linux/of.h
index da1ee95241c1..7aef555f9bc2 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -1266,6 +1266,8 @@ enum of_reconfig_change {
 };
 
 #ifdef CONFIG_OF_DYNAMIC
+#include <linux/slab.h>
+
 extern int of_reconfig_notifier_register(struct notifier_block *);
 extern int of_reconfig_notifier_unregister(struct notifier_block *);
 extern int of_reconfig_notify(unsigned long, struct of_reconfig_data *rd);
@@ -1309,6 +1311,23 @@ static inline int of_changeset_update_property(struct of_changeset *ocs,
 {
 	return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop);
 }
+
+struct device_node *of_changeset_create_device_nodev(
+	struct of_changeset *ocs, struct device_node *parent,
+	const char *fmt, va_list vargs);
+
+__printf(3, 4) struct device_node *
+of_changeset_create_device_node(struct of_changeset *ocs,
+	struct device_node *parent, const char *fmt, ...);
+
+int __of_changeset_add_update_property_copy(struct of_changeset *ocs,
+		struct device_node *np, const char *name, const void *value,
+		int length, bool update);
+
+int __of_changeset_add_update_property_string_list(
+		struct of_changeset *ocs, struct device_node *np,
+		const char *name, const char **strs, int count, bool update);
+
 #else /* CONFIG_OF_DYNAMIC */
 static inline int of_reconfig_notifier_register(struct notifier_block *nb)
 {
@@ -1328,8 +1347,317 @@ static inline int of_reconfig_get_state_change(unsigned long action,
 {
 	return -EINVAL;
 }
+
+static inline struct device_node *of_changeset_create_device_nodev(
+	struct of_changeset *ocs, struct device_node *parent,
+	const char *fmt, va_list vargs)
+{
+	return ERR_PTR(-EINVAL);
+}
+
+static inline __printf(3, 4) struct device_node *
+of_changeset_create_device_node(struct of_changeset *ocs,
+	struct device_node *parent, const char *fmt, ...)
+{
+	return ERR_PTR(-EINVAL);
+}
+
+static inline int __of_changeset_add_update_property_copy(
+	struct of_changeset *ocs, struct device_node *np,
+	const char *name, const void *value, int length, bool update)
+{
+	return -EINVAL;
+}
+
+static inline __printf(4, 5) int of_changeset_add_property_stringf(
+		struct of_changeset *ocs, struct device_node *np,
+		const char *name, const char *fmt, ...)
+{
+	return -EINVAL;
+}
+
+static inline int of_changeset_update_property_stringf(
+	struct of_changeset *ocs, struct device_node *np,
+	const char *name, const char *fmt, ...)
+{
+	return -EINVAL;
+}
+
+static inline int __of_changeset_add_update_property_string_list(
+		struct of_changeset *ocs, struct device_node *np,
+		const char *name, const char **strs, int count, bool update)
+{
+	return -EINVAL;
+}
+
 #endif /* CONFIG_OF_DYNAMIC */
 
+/**
+ * of_changeset_add_property_copy - Create a new property copying name & value
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @value:	pointer to the value data
+ * @length:	length of the value in bytes
+ *
+ * Adds a property to the changeset by making copies of the name & value
+ * entries.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_add_property_copy(struct of_changeset *ocs,
+	struct device_node *np, const char *name,
+	const void *value, int length)
+{
+	return __of_changeset_add_update_property_copy(ocs, np, name, value,
+			length, false);
+}
+
+/**
+ * of_changeset_update_property_copy - Update a property copying name & value
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @value:	pointer to the value data
+ * @length:	length of the value in bytes
+ *
+ * Update a property to the changeset by making copies of the name & value
+ * entries.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_update_property_copy(struct of_changeset *ocs,
+	struct device_node *np, const char *name,
+	const void *value, int length)
+{
+	return __of_changeset_add_update_property_copy(ocs, np, name, value,
+			length, true);
+}
+
+/**
+ * __of_changeset_add_update_property_string - Create/update a string property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @str:	string property value
+ * @update:	True on update operation
+ *
+ * Adds/updates a string property to the changeset by making copies of the name
+ * and the given value. The @update parameter controls whether an add or
+ * update takes place.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int __of_changeset_add_update_property_string(
+	struct of_changeset *ocs, struct device_node *np, const char *name,
+	const char *str, bool update)
+{
+	return __of_changeset_add_update_property_copy(ocs, np, name, str,
+			strlen(str) + 1, update);
+}
+
+/**
+ * __of_changeset_add_update_property_stringv - Create/update a formatted
+ *						string property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @fmt:	format of string property
+ * @vargs:	arguments of the format string
+ * @update:	True on update operation
+ *
+ * Adds/updates a string property to the changeset by making copies of the name
+ * and the formatted value. The @update parameter controls whether an add or
+ * update takes place.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int __of_changeset_add_update_property_stringv(
+	struct of_changeset *ocs, struct device_node *np, const char *name,
+	const char *fmt, va_list vargs, bool update)
+{
+	char *str;
+	int ret;
+
+	str = kvasprintf(GFP_KERNEL, fmt, vargs);
+	if (!str)
+		return -ENOMEM;
+	ret = __of_changeset_add_update_property_string(ocs, np, name, str,
+			update);
+	kfree(str);
+
+	return ret;
+}
+
+/**
+ * of_changeset_add_property_string_list - Create a new string list property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @strs:	pointer to the string list
+ * @count:	string count
+ *
+ * Adds a string list property to the changeset.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_add_property_string_list(
+	struct of_changeset *ocs, struct device_node *np, const char *name,
+	const char **strs, int count)
+{
+	return __of_changeset_add_update_property_string_list(ocs, np, name,
+			strs, count, false);
+}
+
+/**
+ * of_changeset_update_property_string_list - Update string list property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @strs:	pointer to the string list
+ * @count:	string count
+ *
+ * Updates a string list property to the changeset.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_update_property_string_list(
+	struct of_changeset *ocs, struct device_node *np,
+	const char *name, const char **strs, int count)
+{
+	return __of_changeset_add_update_property_string_list(ocs, np, name,
+			strs, count, true);
+}
+
+/**
+ * of_changeset_add_property_string - Adds a string property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @str:	string property
+ *
+ * Adds a string property to the changeset by making copies of the name
+ * and the string value.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_add_property_string(
+	struct of_changeset *ocs, struct device_node *np,
+	const char *name, const char *str)
+{
+	return __of_changeset_add_update_property_string(ocs, np, name, str,
+			false);
+}
+
+/**
+ * of_changeset_update_property_string - Update a string property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @str:	string property
+ *
+ * Updates a string property to the changeset by making copies of the name
+ * and the string value.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_update_property_string(
+	struct of_changeset *ocs, struct device_node *np,
+	const char *name, const char *str)
+{
+	return __of_changeset_add_update_property_string(ocs, np, name, str,
+			true);
+}
+
+/**
+ * of_changeset_add_property_u32 - Create a new u32 property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @val:	value in host endian format
+ *
+ * Adds a u32 property to the changeset.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_add_property_u32(struct of_changeset *ocs,
+		struct device_node *np, const char *name, u32 val)
+{
+	val = cpu_to_be32(val);
+	return __of_changeset_add_update_property_copy(ocs, np, name, &val,
+			sizeof(val), false);
+}
+
+/**
+ * of_changeset_update_property_u32 - Update u32 property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ * @val:	value in host endian format
+ *
+ * Updates a u32 property to the changeset.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_update_property_u32(
+	struct of_changeset *ocs, struct device_node *np,
+	const char *name, u32 val)
+{
+	val = cpu_to_be32(val);
+	return __of_changeset_add_update_property_copy(ocs, np, name, &val,
+			sizeof(val), true);
+}
+
+/**
+ * of_changeset_add_property_bool - Create a new u32 property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ *
+ * Adds a bool property to the changeset. Note that there is
+ * no option to set the value to false, since the property
+ * existing sets it to true.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_add_property_bool(
+	struct of_changeset *ocs, struct device_node *np, const char *name)
+{
+	return __of_changeset_add_update_property_copy(ocs, np, name, "", 0,
+			false);
+}
+
+/**
+ * of_changeset_update_property_bool - Update a bool property
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer
+ * @name:	name of the property
+ *
+ * Updates a property to the changeset. Note that there is
+ * no option to set the value to false, since the property
+ * existing sets it to true.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+static inline int of_changeset_update_property_bool(struct of_changeset *ocs,
+		struct device_node *np, const char *name)
+{
+	return __of_changeset_add_update_property_copy(ocs, np, name, "", 0,
+			true);
+}
+
 /**
  * of_device_is_system_power_controller - Tells if system-power-controller is found for device_node
  * @np: Pointer to the given device_node
-- 
Regards,

Laurent Pinchart

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dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v4 05/16] of: changeset: Add of_changeset_node_move method

[Laurent Pinchart]

From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>

Adds a changeset helper for moving a subtree to a different place
in the running tree. This is useful in advances cases of dynamic
device tree construction.

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/of/dynamic.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 include/linux/of.h   |  9 +++++++
 2 files changed, 75 insertions(+)

diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
index 85e722ed8631..27d9057ef360 100644
--- a/drivers/of/dynamic.c
+++ b/drivers/of/dynamic.c
@@ -1132,3 +1132,69 @@ int __of_changeset_add_update_property_string_list(
 	return ret;
 }
 EXPORT_SYMBOL_GPL(__of_changeset_add_update_property_string_list);
+
+static struct device_node *
+__of_changeset_node_move_one(struct of_changeset *ocs,
+		struct device_node *np, struct device_node *new_parent)
+{
+	struct device_node *np2;
+	const char *unitname;
+	int err;
+
+	err = of_changeset_detach_node(ocs, np);
+	if (err)
+		return ERR_PTR(err);
+
+	unitname = strrchr(np->full_name, '/');
+	if (!unitname)
+		unitname = np->full_name;
+
+	np2 = __of_node_dup(np, "%s/%s",
+			new_parent->full_name, unitname);
+	if (!np2)
+		return ERR_PTR(-ENOMEM);
+	np2->parent = new_parent;
+
+	err = of_changeset_attach_node(ocs, np2);
+	if (err)
+		return ERR_PTR(err);
+
+	return np2;
+}
+
+/**
+ * of_changeset_node_move_to - Moves a subtree to a new place in
+ *                             the tree
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer to be moved
+ * @to:		device node of the new parent
+ *
+ * Moves a subtree to a new place in the tree.
+ * Note that a move is a safe operation because the phandles
+ * remain valid.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+int of_changeset_node_move(struct of_changeset *ocs,
+		struct device_node *np, struct device_node *new_parent)
+{
+	struct device_node *npc, *nppc;
+
+	/* move the root first */
+	nppc = __of_changeset_node_move_one(ocs, np, new_parent);
+	if (IS_ERR(nppc))
+		return PTR_ERR(nppc);
+
+	/* move the subtrees next */
+	for_each_child_of_node(np, npc) {
+		nppc = __of_changeset_node_move_one(ocs, npc, nppc);
+		if (IS_ERR(nppc)) {
+			of_node_put(npc);
+			return PTR_ERR(nppc);
+		}
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(of_changeset_node_move);
diff --git a/include/linux/of.h b/include/linux/of.h
index 7aef555f9bc2..76197bc75346 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -1328,6 +1328,9 @@ int __of_changeset_add_update_property_string_list(
 		struct of_changeset *ocs, struct device_node *np,
 		const char *name, const char **strs, int count, bool update);
 
+int of_changeset_node_move(struct of_changeset *ocs,
+	struct device_node *np, struct device_node *new_parent);
+
 #else /* CONFIG_OF_DYNAMIC */
 static inline int of_reconfig_notifier_register(struct notifier_block *nb)
 {
@@ -1390,6 +1393,12 @@ static inline int __of_changeset_add_update_property_string_list(
 	return -EINVAL;
 }
 
+static inline int of_changeset_node_move(struct of_changeset *ocs,
+		struct device_node *np, struct device_node *new_parent)
+{
+	return -EINVAL;
+}
+
 #endif /* CONFIG_OF_DYNAMIC */
 
 /**
-- 
Regards,

Laurent Pinchart

[PATCH v4 05/16] of: changeset: Add of_changeset_node_move method

[Laurent Pinchart]

From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>

Adds a changeset helper for moving a subtree to a different place
in the running tree. This is useful in advances cases of dynamic
device tree construction.

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/of/dynamic.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 include/linux/of.h   |  9 +++++++
 2 files changed, 75 insertions(+)

diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
index 85e722ed8631..27d9057ef360 100644
--- a/drivers/of/dynamic.c
+++ b/drivers/of/dynamic.c
@@ -1132,3 +1132,69 @@ int __of_changeset_add_update_property_string_list(
 	return ret;
 }
 EXPORT_SYMBOL_GPL(__of_changeset_add_update_property_string_list);
+
+static struct device_node *
+__of_changeset_node_move_one(struct of_changeset *ocs,
+		struct device_node *np, struct device_node *new_parent)
+{
+	struct device_node *np2;
+	const char *unitname;
+	int err;
+
+	err = of_changeset_detach_node(ocs, np);
+	if (err)
+		return ERR_PTR(err);
+
+	unitname = strrchr(np->full_name, '/');
+	if (!unitname)
+		unitname = np->full_name;
+
+	np2 = __of_node_dup(np, "%s/%s",
+			new_parent->full_name, unitname);
+	if (!np2)
+		return ERR_PTR(-ENOMEM);
+	np2->parent = new_parent;
+
+	err = of_changeset_attach_node(ocs, np2);
+	if (err)
+		return ERR_PTR(err);
+
+	return np2;
+}
+
+/**
+ * of_changeset_node_move_to - Moves a subtree to a new place in
+ *                             the tree
+ *
+ * @ocs:	changeset pointer
+ * @np:		device node pointer to be moved
+ * @to:		device node of the new parent
+ *
+ * Moves a subtree to a new place in the tree.
+ * Note that a move is a safe operation because the phandles
+ * remain valid.
+ *
+ * Returns zero on success, a negative error value otherwise.
+ */
+int of_changeset_node_move(struct of_changeset *ocs,
+		struct device_node *np, struct device_node *new_parent)
+{
+	struct device_node *npc, *nppc;
+
+	/* move the root first */
+	nppc = __of_changeset_node_move_one(ocs, np, new_parent);
+	if (IS_ERR(nppc))
+		return PTR_ERR(nppc);
+
+	/* move the subtrees next */
+	for_each_child_of_node(np, npc) {
+		nppc = __of_changeset_node_move_one(ocs, npc, nppc);
+		if (IS_ERR(nppc)) {
+			of_node_put(npc);
+			return PTR_ERR(nppc);
+		}
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(of_changeset_node_move);
diff --git a/include/linux/of.h b/include/linux/of.h
index 7aef555f9bc2..76197bc75346 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -1328,6 +1328,9 @@ int __of_changeset_add_update_property_string_list(
 		struct of_changeset *ocs, struct device_node *np,
 		const char *name, const char **strs, int count, bool update);
 
+int of_changeset_node_move(struct of_changeset *ocs,
+	struct device_node *np, struct device_node *new_parent);
+
 #else /* CONFIG_OF_DYNAMIC */
 static inline int of_reconfig_notifier_register(struct notifier_block *nb)
 {
@@ -1390,6 +1393,12 @@ static inline int __of_changeset_add_update_property_string_list(
 	return -EINVAL;
 }
 
+static inline int of_changeset_node_move(struct of_changeset *ocs,
+		struct device_node *np, struct device_node *new_parent)
+{
+	return -EINVAL;
+}
+
 #endif /* CONFIG_OF_DYNAMIC */
 
 /**
-- 
Regards,

Laurent Pinchart

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dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v4 06/16] of: unittest: changeset helpers

[Laurent Pinchart]

From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>

Add a unitest specific for the new changeset helpers.

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/of/unittest.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 7a9abaae874d..1b21d2c549a8 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -609,6 +609,59 @@ static void __init of_unittest_changeset(void)
 #endif
 }
 
+static void __init of_unittest_changeset_helper(void)
+{
+#ifdef CONFIG_OF_DYNAMIC
+	struct device_node *n1, *n2, *n21, *parent, *np;
+	struct of_changeset chgset;
+
+	of_changeset_init(&chgset);
+
+	parent = of_find_node_by_path("/testcase-data/changeset");
+
+	unittest(parent, "testcase setup failure\n");
+	n1 = of_changeset_create_device_node(&chgset,
+			parent, "/testcase-data/changeset/n1");
+	unittest(n1, "testcase setup failure\n");
+	n2 = of_changeset_create_device_node(&chgset,
+			parent, "/testcase-data/changeset/n2");
+	unittest(n2, "testcase setup failure\n");
+	n21 = of_changeset_create_device_node(&chgset, n2, "%s/%s",
+			"/testcase-data/changeset/n2", "n21");
+	unittest(n21, "testcase setup failure\n");
+
+	unittest(!of_changeset_add_property_string(&chgset, parent,
+				"prop-add", "foo"), "fail add prop\n");
+
+	unittest(!of_changeset_attach_node(&chgset, n1), "fail n1 attach\n");
+	unittest(!of_changeset_attach_node(&chgset, n2), "fail n2 attach\n");
+	unittest(!of_changeset_attach_node(&chgset, n21), "fail n21 attach\n");
+
+	unittest(!of_changeset_apply(&chgset), "apply failed\n");
+
+	/* Make sure node names are constructed correctly */
+	np = of_find_node_by_path("/testcase-data/changeset/n1");
+	unittest(np, "'%s' not added\n", n1->full_name);
+	of_node_put(np);
+
+	/* Make sure node names are constructed correctly */
+	np = of_find_node_by_path("/testcase-data/changeset/n2");
+	unittest(np, "'%s' not added\n", n2->full_name);
+	of_node_put(np);
+
+	np = of_find_node_by_path("/testcase-data/changeset/n2/n21");
+	unittest(np, "'%s' not added\n", n21->full_name);
+	of_node_put(np);
+
+	unittest(!of_changeset_revert(&chgset), "revert failed\n");
+
+	of_changeset_destroy(&chgset);
+
+	of_node_put(parent);
+#endif
+}
+
+
 static void __init of_unittest_parse_interrupts(void)
 {
 	struct device_node *np;
@@ -2363,6 +2416,7 @@ static int __init of_unittest(void)
 	of_unittest_property_string();
 	of_unittest_property_copy();
 	of_unittest_changeset();
+	of_unittest_changeset_helper();
 	of_unittest_parse_interrupts();
 	of_unittest_parse_interrupts_extended();
 	of_unittest_match_node();
-- 
Regards,

Laurent Pinchart

[PATCH v4 06/16] of: unittest: changeset helpers

[Laurent Pinchart]

From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>

Add a unitest specific for the new changeset helpers.

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/of/unittest.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 7a9abaae874d..1b21d2c549a8 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -609,6 +609,59 @@ static void __init of_unittest_changeset(void)
 #endif
 }
 
+static void __init of_unittest_changeset_helper(void)
+{
+#ifdef CONFIG_OF_DYNAMIC
+	struct device_node *n1, *n2, *n21, *parent, *np;
+	struct of_changeset chgset;
+
+	of_changeset_init(&chgset);
+
+	parent = of_find_node_by_path("/testcase-data/changeset");
+
+	unittest(parent, "testcase setup failure\n");
+	n1 = of_changeset_create_device_node(&chgset,
+			parent, "/testcase-data/changeset/n1");
+	unittest(n1, "testcase setup failure\n");
+	n2 = of_changeset_create_device_node(&chgset,
+			parent, "/testcase-data/changeset/n2");
+	unittest(n2, "testcase setup failure\n");
+	n21 = of_changeset_create_device_node(&chgset, n2, "%s/%s",
+			"/testcase-data/changeset/n2", "n21");
+	unittest(n21, "testcase setup failure\n");
+
+	unittest(!of_changeset_add_property_string(&chgset, parent,
+				"prop-add", "foo"), "fail add prop\n");
+
+	unittest(!of_changeset_attach_node(&chgset, n1), "fail n1 attach\n");
+	unittest(!of_changeset_attach_node(&chgset, n2), "fail n2 attach\n");
+	unittest(!of_changeset_attach_node(&chgset, n21), "fail n21 attach\n");
+
+	unittest(!of_changeset_apply(&chgset), "apply failed\n");
+
+	/* Make sure node names are constructed correctly */
+	np = of_find_node_by_path("/testcase-data/changeset/n1");
+	unittest(np, "'%s' not added\n", n1->full_name);
+	of_node_put(np);
+
+	/* Make sure node names are constructed correctly */
+	np = of_find_node_by_path("/testcase-data/changeset/n2");
+	unittest(np, "'%s' not added\n", n2->full_name);
+	of_node_put(np);
+
+	np = of_find_node_by_path("/testcase-data/changeset/n2/n21");
+	unittest(np, "'%s' not added\n", n21->full_name);
+	of_node_put(np);
+
+	unittest(!of_changeset_revert(&chgset), "revert failed\n");
+
+	of_changeset_destroy(&chgset);
+
+	of_node_put(parent);
+#endif
+}
+
+
 static void __init of_unittest_parse_interrupts(void)
 {
 	struct device_node *np;
@@ -2363,6 +2416,7 @@ static int __init of_unittest(void)
 	of_unittest_property_string();
 	of_unittest_property_copy();
 	of_unittest_changeset();
+	of_unittest_changeset_helper();
 	of_unittest_parse_interrupts();
 	of_unittest_parse_interrupts_extended();
 	of_unittest_match_node();
-- 
Regards,

Laurent Pinchart

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https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v4 07/16] i2c: demux: Use changeset helpers for clarity

[Laurent Pinchart]

From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>

The changeset helpers are easier to use, use them instead of
using the static property.

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
["okay" -> "ok"]
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/i2c/muxes/i2c-demux-pinctrl.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/i2c/muxes/i2c-demux-pinctrl.c b/drivers/i2c/muxes/i2c-demux-pinctrl.c
index 33ce032cb701..0f0046831492 100644
--- a/drivers/i2c/muxes/i2c-demux-pinctrl.c
+++ b/drivers/i2c/muxes/i2c-demux-pinctrl.c
@@ -220,10 +220,7 @@ static int i2c_demux_pinctrl_probe(struct platform_device *pdev)
 
 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv)
 			   + num_chan * sizeof(struct i2c_demux_pinctrl_chan), GFP_KERNEL);
-
-	props = devm_kcalloc(&pdev->dev, num_chan, sizeof(*props), GFP_KERNEL);
-
-	if (!priv || !props)
+	if (!priv)
 		return -ENOMEM;
 
 	err = of_property_read_string(np, "i2c-bus-name", &priv->bus_name);
@@ -241,12 +238,9 @@ static int i2c_demux_pinctrl_probe(struct platform_device *pdev)
 		}
 		priv->chan[i].parent_np = adap_np;
 
-		props[i].name = devm_kstrdup(&pdev->dev, "status", GFP_KERNEL);
-		props[i].value = devm_kstrdup(&pdev->dev, "ok", GFP_KERNEL);
-		props[i].length = 3;
-
 		of_changeset_init(&priv->chan[i].chgset);
-		of_changeset_update_property(&priv->chan[i].chgset, adap_np, &props[i]);
+		of_changeset_update_property_string(&priv->chan[i].chgset,
+						    adap_np, "status", "ok");
 	}
 
 	priv->num_chan = num_chan;
-- 
Regards,

Laurent Pinchart

[PATCH v4 07/16] i2c: demux: Use changeset helpers for clarity

[Laurent Pinchart]

From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>

The changeset helpers are easier to use, use them instead of
using the static property.

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
["okay" -> "ok"]
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/i2c/muxes/i2c-demux-pinctrl.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/i2c/muxes/i2c-demux-pinctrl.c b/drivers/i2c/muxes/i2c-demux-pinctrl.c
index 33ce032cb701..0f0046831492 100644
--- a/drivers/i2c/muxes/i2c-demux-pinctrl.c
+++ b/drivers/i2c/muxes/i2c-demux-pinctrl.c
@@ -220,10 +220,7 @@ static int i2c_demux_pinctrl_probe(struct platform_device *pdev)
 
 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv)
 			   + num_chan * sizeof(struct i2c_demux_pinctrl_chan), GFP_KERNEL);
-
-	props = devm_kcalloc(&pdev->dev, num_chan, sizeof(*props), GFP_KERNEL);
-
-	if (!priv || !props)
+	if (!priv)
 		return -ENOMEM;
 
 	err = of_property_read_string(np, "i2c-bus-name", &priv->bus_name);
@@ -241,12 +238,9 @@ static int i2c_demux_pinctrl_probe(struct platform_device *pdev)
 		}
 		priv->chan[i].parent_np = adap_np;
 
-		props[i].name = devm_kstrdup(&pdev->dev, "status", GFP_KERNEL);
-		props[i].value = devm_kstrdup(&pdev->dev, "ok", GFP_KERNEL);
-		props[i].length = 3;
-
 		of_changeset_init(&priv->chan[i].chgset);
-		of_changeset_update_property(&priv->chan[i].chgset, adap_np, &props[i]);
+		of_changeset_update_property_string(&priv->chan[i].chgset,
+						    adap_np, "status", "ok");
 	}
 
 	priv->num_chan = num_chan;
-- 
Regards,

Laurent Pinchart

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v4 08/16] drm: rcar-du: Fix legacy DT to create LVDS encoder nodes

[Laurent Pinchart]

The internal LVDS encoders now have their own DT bindings. Before
switching the driver infrastructure to those new bindings, implement
backward-compatibility through live DT patching.

Patching is disabled and will be enabled along with support for the new
DT bindings in the DU driver.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v3:

- Use the OF changeset API
- Use of_graph_get_endpoint_by_regs()
- Replace hardcoded constants by sizeof()

Changes since v2:

- Update the SPDX headers to use C-style comments in header files
- Removed the manually created __local_fixups__ node
- Perform manual fixups on live DT instead of overlay

Changes since v1:

- Select OF_FLATTREE
- Compile LVDS DT bindings patch code when DRM_RCAR_LVDS is selected
- Update the SPDX headers to use GPL-2.0 instead of GPL-2.0-only
- Turn __dtb_rcar_du_of_lvds_(begin|end) from u8 to char
- Pass void begin and end pointers to rcar_du_of_get_overlay()
- Use of_get_parent() instead of accessing the parent pointer directly
- Find the LVDS endpoints nodes based on the LVDS node instead of the
  root of the overlay
- Update to the <soc>-lvds compatible string format
---
 drivers/gpu/drm/rcar-du/Kconfig                    |   2 +
 drivers/gpu/drm/rcar-du/Makefile                   |   7 +-
 drivers/gpu/drm/rcar-du/rcar_du_of.c               | 307 +++++++++++++++++++++
 drivers/gpu/drm/rcar-du/rcar_du_of.h               |  20 ++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts    |  81 ++++++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts    |  55 ++++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts    |  55 ++++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts    |  55 ++++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts    |  55 ++++
 9 files changed, 636 insertions(+), 1 deletion(-)
 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

diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig
index 5d0b4b7119af..3f83352a7313 100644
--- a/drivers/gpu/drm/rcar-du/Kconfig
+++ b/drivers/gpu/drm/rcar-du/Kconfig
@@ -22,6 +22,8 @@ config DRM_RCAR_LVDS
 	bool "R-Car DU LVDS Encoder Support"
 	depends on DRM_RCAR_DU
 	select DRM_PANEL
+	select OF_FLATTREE
+	select OF_OVERLAY
 	help
 	  Enable support for the R-Car Display Unit embedded LVDS encoders.
 
diff --git a/drivers/gpu/drm/rcar-du/Makefile b/drivers/gpu/drm/rcar-du/Makefile
index 0cf5c11030e8..86b337b4be5d 100644
--- a/drivers/gpu/drm/rcar-du/Makefile
+++ b/drivers/gpu/drm/rcar-du/Makefile
@@ -8,7 +8,12 @@ rcar-du-drm-y := rcar_du_crtc.o \
 		 rcar_du_plane.o
 
 rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS)	+= rcar_du_lvdsenc.o
-
+rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS)	+= rcar_du_of.o \
+					   rcar_du_of_lvds_r8a7790.dtb.o \
+					   rcar_du_of_lvds_r8a7791.dtb.o \
+					   rcar_du_of_lvds_r8a7793.dtb.o \
+					   rcar_du_of_lvds_r8a7795.dtb.o \
+					   rcar_du_of_lvds_r8a7796.dtb.o
 rcar-du-drm-$(CONFIG_DRM_RCAR_VSP)	+= rcar_du_vsp.o
 
 obj-$(CONFIG_DRM_RCAR_DU)		+= rcar-du-drm.o
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of.c b/drivers/gpu/drm/rcar-du/rcar_du_of.c
new file mode 100644
index 000000000000..12fae8814309
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_du_of.c
@@ -0,0 +1,307 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rcar_du_of.c - Legacy DT bindings compatibility
+ *
+ * Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * Based on work from Jyri Sarha <jsarha@ti.com>
+ * Copyright (C) 2015 Texas Instruments
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_fdt.h>
+#include <linux/of_graph.h>
+#include <linux/slab.h>
+
+#include "rcar_du_crtc.h"
+#include "rcar_du_drv.h"
+
+/* -----------------------------------------------------------------------------
+ * Generic Overlay Handling
+ */
+
+struct rcar_du_of_overlay {
+	const char *compatible;
+	void *begin;
+	void *end;
+};
+
+#define RCAR_DU_OF_DTB(type, soc)					\
+	extern char __dtb_rcar_du_of_##type##_##soc##_begin[];		\
+	extern char __dtb_rcar_du_of_##type##_##soc##_end[]
+
+#define RCAR_DU_OF_OVERLAY(type, soc)					\
+	{								\
+		.compatible = "renesas,du-" #soc,			\
+		.begin = __dtb_rcar_du_of_##type##_##soc##_begin,	\
+		.end = __dtb_rcar_du_of_##type##_##soc##_end,		\
+	}
+
+static int __init rcar_du_of_apply_overlay(const struct rcar_du_of_overlay *dtbs,
+					   const char *compatible)
+{
+	const struct rcar_du_of_overlay *dtb = NULL;
+	struct device_node *node = NULL;
+	unsigned int i;
+	int ovcs_id;
+	void *data;
+	void *mem;
+	int ret;
+
+	for (i = 0; dtbs[i].compatible; ++i) {
+		if (!strcmp(dtbs[i].compatible, compatible)) {
+			dtb = &dtbs[i];
+			break;
+		}
+	}
+
+	if (!dtb)
+		return -ENODEV;
+
+	data = kmemdup(dtb->begin, dtb->end - dtb->begin, GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	mem = of_fdt_unflatten_tree(data, NULL, &node);
+	if (!mem) {
+		ret = -ENOMEM;
+		goto done;
+	}
+
+	ovcs_id = 0;
+	ret = of_overlay_apply(node, &ovcs_id);
+
+done:
+	of_node_put(node);
+	kfree(data);
+	kfree(mem);
+
+	return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * LVDS Overlays
+ */
+
+RCAR_DU_OF_DTB(lvds, r8a7790);
+RCAR_DU_OF_DTB(lvds, r8a7791);
+RCAR_DU_OF_DTB(lvds, r8a7793);
+RCAR_DU_OF_DTB(lvds, r8a7795);
+RCAR_DU_OF_DTB(lvds, r8a7796);
+
+static const struct rcar_du_of_overlay rcar_du_lvds_overlays[] __initconst = {
+	RCAR_DU_OF_OVERLAY(lvds, r8a7790),
+	RCAR_DU_OF_OVERLAY(lvds, r8a7791),
+	RCAR_DU_OF_OVERLAY(lvds, r8a7793),
+	RCAR_DU_OF_OVERLAY(lvds, r8a7795),
+	RCAR_DU_OF_OVERLAY(lvds, r8a7796),
+	{ /* Sentinel */ },
+};
+
+static struct of_changeset rcar_du_lvds_changeset;
+
+static void __init rcar_du_of_lvds_patch_one(struct device_node *lvds,
+					     const struct of_phandle_args *clk,
+					     struct device_node *local,
+					     struct device_node *remote)
+{
+	unsigned int psize;
+	unsigned int i;
+	__be32 value[4];
+	int ret;
+
+	/*
+	 * Set the LVDS clocks property. This can't be performed by the overlay
+	 * as the structure of the clock specifier has changed over time, and we
+	 * don't know at compile time which binding version the system we will
+	 * run on uses.
+	 */
+	if (clk->args_count >= ARRAY_SIZE(value) - 1)
+		return;
+
+	of_changeset_init(&rcar_du_lvds_changeset);
+
+	value[0] = cpu_to_be32(clk->np->phandle);
+	for (i = 0; i < clk->args_count; ++i)
+		value[i + 1] = cpu_to_be32(clk->args[i]);
+
+	psize = (clk->args_count + 1) * 4;
+	ret = of_changeset_add_property_copy(&rcar_du_lvds_changeset, lvds,
+					     "clocks", value, psize);
+	if (ret < 0)
+		goto done;
+
+	/*
+	 * Insert the node in the OF graph: patch the LVDS ports remote-endpoint
+	 * properties to point to the endpoints of the sibling nodes in the
+	 * graph. This can't be performed by the overlay: on the input side the
+	 * overlay would contain a phandle for the DU LVDS output port that
+	 * would clash with the system DT, and on the output side the connection
+	 * is board-specific.
+	 */
+	value[0] = cpu_to_be32(local->phandle);
+	value[1] = cpu_to_be32(remote->phandle);
+
+	for (i = 0; i < 2; ++i) {
+		struct device_node *endpoint;
+
+		endpoint = of_graph_get_endpoint_by_regs(lvds, i, 0);
+		if (!endpoint) {
+			ret = -EINVAL;
+			goto done;
+		}
+
+		ret = of_changeset_add_property_copy(&rcar_du_lvds_changeset,
+						endpoint, "remote-endpoint",
+						&value[i], sizeof(value[i]));
+		of_node_put(endpoint);
+		if (ret < 0)
+			goto done;
+	}
+
+	ret = of_changeset_apply(&rcar_du_lvds_changeset);
+
+done:
+	if (ret < 0)
+		of_changeset_destroy(&rcar_du_lvds_changeset);
+}
+
+struct lvds_of_data {
+	struct resource res;
+	struct of_phandle_args clkspec;
+	struct device_node *local;
+	struct device_node *remote;
+};
+
+static void __init rcar_du_of_lvds_patch(const struct of_device_id *of_ids)
+{
+	const struct rcar_du_device_info *info;
+	const struct of_device_id *match;
+	struct lvds_of_data lvds_data[2] = { };
+	struct device_node *lvds_node;
+	struct device_node *soc_node;
+	struct device_node *du_node;
+	char compatible[21];
+	const char *soc_name;
+	unsigned int i;
+	int ret;
+
+	/* Get the DU node and exit if not present or disabled. */
+	du_node = of_find_matching_node_and_match(NULL, of_ids, &match);
+	if (!du_node || !of_device_is_available(du_node)) {
+		of_node_put(du_node);
+		return;
+	}
+
+	info = match->data;
+	soc_node = of_get_parent(du_node);
+
+	if (WARN_ON(info->num_lvds > ARRAY_SIZE(lvds_data)))
+		goto done;
+
+	/*
+	 * Skip if the LVDS nodes already exists.
+	 *
+	 * The nodes are searched based on the compatible string, which we
+	 * construct from the SoC name found in the DU compatible string. As a
+	 * match has been found we know the compatible string matches the
+	 * expected format and can thus skip some of the string manipulation
+	 * normal safety checks.
+	 */
+	soc_name = strchr(match->compatible, '-') + 1;
+	sprintf(compatible, "renesas,%s-lvds", soc_name);
+	lvds_node = of_find_compatible_node(NULL, NULL, compatible);
+	if (lvds_node) {
+		of_node_put(lvds_node);
+		return;
+	}
+
+	/*
+	 * Parse the DU node and store the register specifier, the clock
+	 * specifier and the local and remote endpoint of the LVDS link for
+	 * later use.
+	 */
+	for (i = 0; i < info->num_lvds; ++i) {
+		struct lvds_of_data *lvds = &lvds_data[i];
+		unsigned int port;
+		char name[7];
+		int index;
+
+		sprintf(name, "lvds.%u", i);
+		index = of_property_match_string(du_node, "clock-names", name);
+		if (index < 0)
+			continue;
+
+		ret = of_parse_phandle_with_args(du_node, "clocks",
+						 "#clock-cells", index,
+						 &lvds->clkspec);
+		if (ret < 0)
+			continue;
+
+		port = info->routes[RCAR_DU_OUTPUT_LVDS0 + i].port;
+
+		lvds->local = of_graph_get_endpoint_by_regs(du_node, port, 0);
+		if (!lvds->local)
+			continue;
+
+		lvds->remote = of_graph_get_remote_endpoint(lvds->local);
+		if (!lvds->remote)
+			continue;
+
+		index = of_property_match_string(du_node, "reg-names", name);
+		if (index < 0)
+			continue;
+
+		of_address_to_resource(du_node, index, &lvds->res);
+	}
+
+	/* Parse and apply the overlay. This will resolve phandles. */
+	ret = rcar_du_of_apply_overlay(rcar_du_lvds_overlays,
+				       match->compatible);
+	if (ret < 0)
+		goto done;
+
+	/* Patch the newly created LVDS encoder nodes. */
+	for_each_child_of_node(soc_node, lvds_node) {
+		struct resource res;
+
+		if (!of_device_is_compatible(lvds_node, compatible))
+			continue;
+
+		/* Locate the lvds_data entry based on the resource start. */
+		ret = of_address_to_resource(lvds_node, 0, &res);
+		if (ret < 0)
+			continue;
+
+		for (i = 0; i < ARRAY_SIZE(lvds_data); ++i) {
+			if (lvds_data[i].res.start == res.start)
+				break;
+		}
+
+		if (i == ARRAY_SIZE(lvds_data))
+			continue;
+
+		/* Patch the LVDS encoder. */
+		rcar_du_of_lvds_patch_one(lvds_node, &lvds_data[i].clkspec,
+					  lvds_data[i].local,
+					  lvds_data[i].remote);
+	}
+
+done:
+	for (i = 0; i < info->num_lvds; ++i) {
+		of_node_put(lvds_data[i].clkspec.np);
+		of_node_put(lvds_data[i].local);
+		of_node_put(lvds_data[i].remote);
+	}
+
+	of_node_put(soc_node);
+	of_node_put(du_node);
+}
+
+void __init rcar_du_of_init(const struct of_device_id *of_ids)
+{
+	rcar_du_of_lvds_patch(of_ids);
+}
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of.h b/drivers/gpu/drm/rcar-du/rcar_du_of.h
new file mode 100644
index 000000000000..c2e65a727e91
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_du_of.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * rcar_du_of.h - Legacy DT bindings compatibility
+ *
+ * Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+#ifndef __RCAR_DU_OF_H__
+#define __RCAR_DU_OF_H__
+
+#include <linux/init.h>
+
+struct of_device_id;
+
+#ifdef CONFIG_DRM_RCAR_LVDS
+void __init rcar_du_of_init(const struct of_device_id *of_ids);
+#else
+static inline void rcar_du_of_init(const struct of_device_id *of_ids) { }
+#endif /* CONFIG_DRM_RCAR_LVDS */
+
+#endif /* __RCAR_DU_OF_H__ */
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts
new file mode 100644
index 000000000000..6ebb355b652a
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rcar_du_of_lvds_r8a7790.dts - Legacy LVDS DT bindings conversion for R8A7790
+ *
+ * Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * Based on work from Jyri Sarha <jsarha@ti.com>
+ * Copyright (C) 2015 Texas Instruments
+ */
+
+#include <dt-bindings/clock/renesas-cpg-mssr.h>
+
+/dts-v1/;
+/plugin/;
+/ {
+	fragment@0 {
+		target-path = "/";
+		__overlay__ {
+			#address-cells = <2>;
+			#size-cells = <2>;
+
+			lvds@feb90000 {
+				compatible = "renesas,r8a7790-lvds";
+				reg = <0 0xfeb90000 0 0x1c>;
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@0 {
+						reg = <0>;
+						lvds0_input: endpoint {
+						};
+					};
+					port@1 {
+						reg = <1>;
+						lvds0_out: endpoint {
+						};
+					};
+				};
+			};
+
+			lvds@feb94000 {
+				compatible = "renesas,r8a7790-lvds";
+				reg = <0 0xfeb94000 0 0x1c>;
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@0 {
+						reg = <0>;
+						lvds1_input: endpoint {
+						};
+					};
+					port@1 {
+						reg = <1>;
+						lvds1_out: endpoint {
+						};
+					};
+				};
+			};
+		};
+	};
+
+	fragment@1 {
+		target-path = "/display@feb00000/ports";
+		__overlay__ {
+			port@1 {
+				endpoint {
+					remote-endpoint = <&lvds0_input>;
+				};
+			};
+			port@2 {
+				endpoint {
+					remote-endpoint = <&lvds1_input>;
+				};
+			};
+		};
+	};
+};
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts
new file mode 100644
index 000000000000..601982bba27d
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rcar_du_of_lvds_r8a7791.dts - Legacy LVDS DT bindings conversion for R8A7791
+ *
+ * Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * Based on work from Jyri Sarha <jsarha@ti.com>
+ * Copyright (C) 2015 Texas Instruments
+ */
+
+#include <dt-bindings/clock/renesas-cpg-mssr.h>
+
+/dts-v1/;
+/plugin/;
+/ {
+	fragment@0 {
+		target-path = "/";
+		__overlay__ {
+			#address-cells = <2>;
+			#size-cells = <2>;
+
+			lvds@feb90000 {
+				compatible = "renesas,r8a7791-lvds";
+				reg = <0 0xfeb90000 0 0x1c>;
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@0 {
+						reg = <0>;
+						lvds0_input: endpoint {
+						};
+					};
+					port@1 {
+						reg = <1>;
+						lvds0_out: endpoint {
+						};
+					};
+				};
+			};
+		};
+	};
+
+	fragment@1 {
+		target-path = "/display@feb00000/ports";
+		__overlay__ {
+			port@1 {
+				endpoint {
+					remote-endpoint = <&lvds0_input>;
+				};
+			};
+		};
+	};
+};
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts
new file mode 100644
index 000000000000..1c535954a529
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rcar_du_of_lvds_r8a7793.dts - Legacy LVDS DT bindings conversion for R8A7793
+ *
+ * Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * Based on work from Jyri Sarha <jsarha@ti.com>
+ * Copyright (C) 2015 Texas Instruments
+ */
+
+#include <dt-bindings/clock/renesas-cpg-mssr.h>
+
+/dts-v1/;
+/plugin/;
+/ {
+	fragment@0 {
+		target-path = "/";
+		__overlay__ {
+			#address-cells = <2>;
+			#size-cells = <2>;
+
+			lvds@feb90000 {
+				compatible = "renesas,r8a7793-lvds";
+				reg = <0 0xfeb90000 0 0x1c>;
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@0 {
+						reg = <0>;
+						lvds0_input: endpoint {
+						};
+					};
+					port@1 {
+						reg = <1>;
+						lvds0_out: endpoint {
+						};
+					};
+				};
+			};
+		};
+	};
+
+	fragment@1 {
+		target-path = "/display@feb00000/ports";
+		__overlay__ {
+			port@1 {
+				endpoint {
+					remote-endpoint = <&lvds0_input>;
+				};
+			};
+		};
+	};
+};
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts
new file mode 100644
index 000000000000..44e52101ef05
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rcar_du_of_lvds_r8a7795.dts - Legacy LVDS DT bindings conversion for R8A7795
+ *
+ * Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * Based on work from Jyri Sarha <jsarha@ti.com>
+ * Copyright (C) 2015 Texas Instruments
+ */
+
+#include <dt-bindings/clock/renesas-cpg-mssr.h>
+
+/dts-v1/;
+/plugin/;
+/ {
+	fragment@0 {
+		target-path = "/soc";
+		__overlay__ {
+			#address-cells = <2>;
+			#size-cells = <2>;
+
+			lvds@feb90000 {
+				compatible = "renesas,r8a7795-lvds";
+				reg = <0 0xfeb90000 0 0x14>;
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@0 {
+						reg = <0>;
+						lvds0_input: endpoint {
+						};
+					};
+					port@1 {
+						reg = <1>;
+						lvds0_out: endpoint {
+						};
+					};
+				};
+			};
+		};
+	};
+
+	fragment@1 {
+		target-path = "/soc/display@feb00000/ports";
+		__overlay__ {
+			port@3 {
+				endpoint {
+					remote-endpoint = <&lvds0_input>;
+				};
+			};
+		};
+	};
+};
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts
new file mode 100644
index 000000000000..8f45ebe140bd
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rcar_du_of_lvds_r8a7796.dts - Legacy LVDS DT bindings conversion for R8A7796
+ *
+ * Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * Based on work from Jyri Sarha <jsarha@ti.com>
+ * Copyright (C) 2015 Texas Instruments
+ */
+
+#include <dt-bindings/clock/renesas-cpg-mssr.h>
+
+/dts-v1/;
+/plugin/;
+/ {
+	fragment@0 {
+		target-path = "/soc";
+		__overlay__ {
+			#address-cells = <2>;
+			#size-cells = <2>;
+
+			lvds@feb90000 {
+				compatible = "renesas,r8a7796-lvds";
+				reg = <0 0xfeb90000 0 0x14>;
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@0 {
+						reg = <0>;
+						lvds0_input: endpoint {
+						};
+					};
+					port@1 {
+						reg = <1>;
+						lvds0_out: endpoint {
+						};
+					};
+				};
+			};
+		};
+	};
+
+	fragment@1 {
+		target-path = "/soc/display@feb00000/ports";
+		__overlay__ {
+			port@3 {
+				endpoint {
+					remote-endpoint = <&lvds0_input>;
+				};
+			};
+		};
+	};
+};
-- 
Regards,

Laurent Pinchart

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v4 08/16] drm: rcar-du: Fix legacy DT to create LVDS encoder nodes

[Laurent Pinchart]

The internal LVDS encoders now have their own DT bindings. Before
switching the driver infrastructure to those new bindings, implement
backward-compatibility through live DT patching.

Patching is disabled and will be enabled along with support for the new
DT bindings in the DU driver.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v3:

- Use the OF changeset API
- Use of_graph_get_endpoint_by_regs()
- Replace hardcoded constants by sizeof()

Changes since v2:

- Update the SPDX headers to use C-style comments in header files
- Removed the manually created __local_fixups__ node
- Perform manual fixups on live DT instead of overlay

Changes since v1:

- Select OF_FLATTREE
- Compile LVDS DT bindings patch code when DRM_RCAR_LVDS is selected
- Update the SPDX headers to use GPL-2.0 instead of GPL-2.0-only
- Turn __dtb_rcar_du_of_lvds_(begin|end) from u8 to char
- Pass void begin and end pointers to rcar_du_of_get_overlay()
- Use of_get_parent() instead of accessing the parent pointer directly
- Find the LVDS endpoints nodes based on the LVDS node instead of the
  root of the overlay
- Update to the <soc>-lvds compatible string format
---
 drivers/gpu/drm/rcar-du/Kconfig                    |   2 +
 drivers/gpu/drm/rcar-du/Makefile                   |   7 +-
 drivers/gpu/drm/rcar-du/rcar_du_of.c               | 307 +++++++++++++++++++++
 drivers/gpu/drm/rcar-du/rcar_du_of.h               |  20 ++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts    |  81 ++++++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts    |  55 ++++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts    |  55 ++++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts    |  55 ++++
 .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts    |  55 ++++
 9 files changed, 636 insertions(+), 1 deletion(-)
 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

diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig
index 5d0b4b7119af..3f83352a7313 100644
--- a/drivers/gpu/drm/rcar-du/Kconfig
+++ b/drivers/gpu/drm/rcar-du/Kconfig
@@ -22,6 +22,8 @@ config DRM_RCAR_LVDS
 	bool "R-Car DU LVDS Encoder Support"
 	depends on DRM_RCAR_DU
 	select DRM_PANEL
+	select OF_FLATTREE
+	select OF_OVERLAY
 	help
 	  Enable support for the R-Car Display Unit embedded LVDS encoders.
 
diff --git a/drivers/gpu/drm/rcar-du/Makefile b/drivers/gpu/drm/rcar-du/Makefile
index 0cf5c11030e8..86b337b4be5d 100644
--- a/drivers/gpu/drm/rcar-du/Makefile
+++ b/drivers/gpu/drm/rcar-du/Makefile
@@ -8,7 +8,12 @@ rcar-du-drm-y := rcar_du_crtc.o \
 		 rcar_du_plane.o
 
 rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS)	+= rcar_du_lvdsenc.o
-
+rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS)	+= rcar_du_of.o \
+					   rcar_du_of_lvds_r8a7790.dtb.o \
+					   rcar_du_of_lvds_r8a7791.dtb.o \
+					   rcar_du_of_lvds_r8a7793.dtb.o \
+					   rcar_du_of_lvds_r8a7795.dtb.o \
+					   rcar_du_of_lvds_r8a7796.dtb.o
 rcar-du-drm-$(CONFIG_DRM_RCAR_VSP)	+= rcar_du_vsp.o
 
 obj-$(CONFIG_DRM_RCAR_DU)		+= rcar-du-drm.o
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of.c b/drivers/gpu/drm/rcar-du/rcar_du_of.c
new file mode 100644
index 000000000000..12fae8814309
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_du_of.c
@@ -0,0 +1,307 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rcar_du_of.c - Legacy DT bindings compatibility
+ *
+ * Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * Based on work from Jyri Sarha <jsarha@ti.com>
+ * Copyright (C) 2015 Texas Instruments
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_fdt.h>
+#include <linux/of_graph.h>
+#include <linux/slab.h>
+
+#include "rcar_du_crtc.h"
+#include "rcar_du_drv.h"
+
+/* -----------------------------------------------------------------------------
+ * Generic Overlay Handling
+ */
+
+struct rcar_du_of_overlay {
+	const char *compatible;
+	void *begin;
+	void *end;
+};
+
+#define RCAR_DU_OF_DTB(type, soc)					\
+	extern char __dtb_rcar_du_of_##type##_##soc##_begin[];		\
+	extern char __dtb_rcar_du_of_##type##_##soc##_end[]
+
+#define RCAR_DU_OF_OVERLAY(type, soc)					\
+	{								\
+		.compatible = "renesas,du-" #soc,			\
+		.begin = __dtb_rcar_du_of_##type##_##soc##_begin,	\
+		.end = __dtb_rcar_du_of_##type##_##soc##_end,		\
+	}
+
+static int __init rcar_du_of_apply_overlay(const struct rcar_du_of_overlay *dtbs,
+					   const char *compatible)
+{
+	const struct rcar_du_of_overlay *dtb = NULL;
+	struct device_node *node = NULL;
+	unsigned int i;
+	int ovcs_id;
+	void *data;
+	void *mem;
+	int ret;
+
+	for (i = 0; dtbs[i].compatible; ++i) {
+		if (!strcmp(dtbs[i].compatible, compatible)) {
+			dtb = &dtbs[i];
+			break;
+		}
+	}
+
+	if (!dtb)
+		return -ENODEV;
+
+	data = kmemdup(dtb->begin, dtb->end - dtb->begin, GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	mem = of_fdt_unflatten_tree(data, NULL, &node);
+	if (!mem) {
+		ret = -ENOMEM;
+		goto done;
+	}
+
+	ovcs_id = 0;
+	ret = of_overlay_apply(node, &ovcs_id);
+
+done:
+	of_node_put(node);
+	kfree(data);
+	kfree(mem);
+
+	return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * LVDS Overlays
+ */
+
+RCAR_DU_OF_DTB(lvds, r8a7790);
+RCAR_DU_OF_DTB(lvds, r8a7791);
+RCAR_DU_OF_DTB(lvds, r8a7793);
+RCAR_DU_OF_DTB(lvds, r8a7795);
+RCAR_DU_OF_DTB(lvds, r8a7796);
+
+static const struct rcar_du_of_overlay rcar_du_lvds_overlays[] __initconst = {
+	RCAR_DU_OF_OVERLAY(lvds, r8a7790),
+	RCAR_DU_OF_OVERLAY(lvds, r8a7791),
+	RCAR_DU_OF_OVERLAY(lvds, r8a7793),
+	RCAR_DU_OF_OVERLAY(lvds, r8a7795),
+	RCAR_DU_OF_OVERLAY(lvds, r8a7796),
+	{ /* Sentinel */ },
+};
+
+static struct of_changeset rcar_du_lvds_changeset;
+
+static void __init rcar_du_of_lvds_patch_one(struct device_node *lvds,
+					     const struct of_phandle_args *clk,
+					     struct device_node *local,
+					     struct device_node *remote)
+{
+	unsigned int psize;
+	unsigned int i;
+	__be32 value[4];
+	int ret;
+
+	/*
+	 * Set the LVDS clocks property. This can't be performed by the overlay
+	 * as the structure of the clock specifier has changed over time, and we
+	 * don't know at compile time which binding version the system we will
+	 * run on uses.
+	 */
+	if (clk->args_count >= ARRAY_SIZE(value) - 1)
+		return;
+
+	of_changeset_init(&rcar_du_lvds_changeset);
+
+	value[0] = cpu_to_be32(clk->np->phandle);
+	for (i = 0; i < clk->args_count; ++i)
+		value[i + 1] = cpu_to_be32(clk->args[i]);
+
+	psize = (clk->args_count + 1) * 4;
+	ret = of_changeset_add_property_copy(&rcar_du_lvds_changeset, lvds,
+					     "clocks", value, psize);
+	if (ret < 0)
+		goto done;
+
+	/*
+	 * Insert the node in the OF graph: patch the LVDS ports remote-endpoint
+	 * properties to point to the endpoints of the sibling nodes in the
+	 * graph. This can't be performed by the overlay: on the input side the
+	 * overlay would contain a phandle for the DU LVDS output port that
+	 * would clash with the system DT, and on the output side the connection
+	 * is board-specific.
+	 */
+	value[0] = cpu_to_be32(local->phandle);
+	value[1] = cpu_to_be32(remote->phandle);
+
+	for (i = 0; i < 2; ++i) {
+		struct device_node *endpoint;
+
+		endpoint = of_graph_get_endpoint_by_regs(lvds, i, 0);
+		if (!endpoint) {
+			ret = -EINVAL;
+			goto done;
+		}
+
+		ret = of_changeset_add_property_copy(&rcar_du_lvds_changeset,
+						endpoint, "remote-endpoint",
+						&value[i], sizeof(value[i]));
+		of_node_put(endpoint);
+		if (ret < 0)
+			goto done;
+	}
+
+	ret = of_changeset_apply(&rcar_du_lvds_changeset);
+
+done:
+	if (ret < 0)
+		of_changeset_destroy(&rcar_du_lvds_changeset);
+}
+
+struct lvds_of_data {
+	struct resource res;
+	struct of_phandle_args clkspec;
+	struct device_node *local;
+	struct device_node *remote;
+};
+
+static void __init rcar_du_of_lvds_patch(const struct of_device_id *of_ids)
+{
+	const struct rcar_du_device_info *info;
+	const struct of_device_id *match;
+	struct lvds_of_data lvds_data[2] = { };
+	struct device_node *lvds_node;
+	struct device_node *soc_node;
+	struct device_node *du_node;
+	char compatible[21];
+	const char *soc_name;
+	unsigned int i;
+	int ret;
+
+	/* Get the DU node and exit if not present or disabled. */
+	du_node = of_find_matching_node_and_match(NULL, of_ids, &match);
+	if (!du_node || !of_device_is_available(du_node)) {
+		of_node_put(du_node);
+		return;
+	}
+
+	info = match->data;
+	soc_node = of_get_parent(du_node);
+
+	if (WARN_ON(info->num_lvds > ARRAY_SIZE(lvds_data)))
+		goto done;
+
+	/*
+	 * Skip if the LVDS nodes already exists.
+	 *
+	 * The nodes are searched based on the compatible string, which we
+	 * construct from the SoC name found in the DU compatible string. As a
+	 * match has been found we know the compatible string matches the
+	 * expected format and can thus skip some of the string manipulation
+	 * normal safety checks.
+	 */
+	soc_name = strchr(match->compatible, '-') + 1;
+	sprintf(compatible, "renesas,%s-lvds", soc_name);
+	lvds_node = of_find_compatible_node(NULL, NULL, compatible);
+	if (lvds_node) {
+		of_node_put(lvds_node);
+		return;
+	}
+
+	/*
+	 * Parse the DU node and store the register specifier, the clock
+	 * specifier and the local and remote endpoint of the LVDS link for
+	 * later use.
+	 */
+	for (i = 0; i < info->num_lvds; ++i) {
+		struct lvds_of_data *lvds = &lvds_data[i];
+		unsigned int port;
+		char name[7];
+		int index;
+
+		sprintf(name, "lvds.%u", i);
+		index = of_property_match_string(du_node, "clock-names", name);
+		if (index < 0)
+			continue;
+
+		ret = of_parse_phandle_with_args(du_node, "clocks",
+						 "#clock-cells", index,
+						 &lvds->clkspec);
+		if (ret < 0)
+			continue;
+
+		port = info->routes[RCAR_DU_OUTPUT_LVDS0 + i].port;
+
+		lvds->local = of_graph_get_endpoint_by_regs(du_node, port, 0);
+		if (!lvds->local)
+			continue;
+
+		lvds->remote = of_graph_get_remote_endpoint(lvds->local);
+		if (!lvds->remote)
+			continue;
+
+		index = of_property_match_string(du_node, "reg-names", name);
+		if (index < 0)
+			continue;
+
+		of_address_to_resource(du_node, index, &lvds->res);
+	}
+
+	/* Parse and apply the overlay. This will resolve phandles. */
+	ret = rcar_du_of_apply_overlay(rcar_du_lvds_overlays,
+				       match->compatible);
+	if (ret < 0)
+		goto done;
+
+	/* Patch the newly created LVDS encoder nodes. */
+	for_each_child_of_node(soc_node, lvds_node) {
+		struct resource res;
+
+		if (!of_device_is_compatible(lvds_node, compatible))
+			continue;
+
+		/* Locate the lvds_data entry based on the resource start. */
+		ret = of_address_to_resource(lvds_node, 0, &res);
+		if (ret < 0)
+			continue;
+
+		for (i = 0; i < ARRAY_SIZE(lvds_data); ++i) {
+			if (lvds_data[i].res.start == res.start)
+				break;
+		}
+
+		if (i == ARRAY_SIZE(lvds_data))
+			continue;
+
+		/* Patch the LVDS encoder. */
+		rcar_du_of_lvds_patch_one(lvds_node, &lvds_data[i].clkspec,
+					  lvds_data[i].local,
+					  lvds_data[i].remote);
+	}
+
+done:
+	for (i = 0; i < info->num_lvds; ++i) {
+		of_node_put(lvds_data[i].clkspec.np);
+		of_node_put(lvds_data[i].local);
+		of_node_put(lvds_data[i].remote);
+	}
+
+	of_node_put(soc_node);
+	of_node_put(du_node);
+}
+
+void __init rcar_du_of_init(const struct of_device_id *of_ids)
+{
+	rcar_du_of_lvds_patch(of_ids);
+}
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of.h b/drivers/gpu/drm/rcar-du/rcar_du_of.h
new file mode 100644
index 000000000000..c2e65a727e91
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_du_of.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * rcar_du_of.h - Legacy DT bindings compatibility
+ *
+ * Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+#ifndef __RCAR_DU_OF_H__
+#define __RCAR_DU_OF_H__
+
+#include <linux/init.h>
+
+struct of_device_id;
+
+#ifdef CONFIG_DRM_RCAR_LVDS
+void __init rcar_du_of_init(const struct of_device_id *of_ids);
+#else
+static inline void rcar_du_of_init(const struct of_device_id *of_ids) { }
+#endif /* CONFIG_DRM_RCAR_LVDS */
+
+#endif /* __RCAR_DU_OF_H__ */
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts
new file mode 100644
index 000000000000..6ebb355b652a
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rcar_du_of_lvds_r8a7790.dts - Legacy LVDS DT bindings conversion for R8A7790
+ *
+ * Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * Based on work from Jyri Sarha <jsarha@ti.com>
+ * Copyright (C) 2015 Texas Instruments
+ */
+
+#include <dt-bindings/clock/renesas-cpg-mssr.h>
+
+/dts-v1/;
+/plugin/;
+/ {
+	fragment@0 {
+		target-path = "/";
+		__overlay__ {
+			#address-cells = <2>;
+			#size-cells = <2>;
+
+			lvds@feb90000 {
+				compatible = "renesas,r8a7790-lvds";
+				reg = <0 0xfeb90000 0 0x1c>;
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@0 {
+						reg = <0>;
+						lvds0_input: endpoint {
+						};
+					};
+					port@1 {
+						reg = <1>;
+						lvds0_out: endpoint {
+						};
+					};
+				};
+			};
+
+			lvds@feb94000 {
+				compatible = "renesas,r8a7790-lvds";
+				reg = <0 0xfeb94000 0 0x1c>;
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@0 {
+						reg = <0>;
+						lvds1_input: endpoint {
+						};
+					};
+					port@1 {
+						reg = <1>;
+						lvds1_out: endpoint {
+						};
+					};
+				};
+			};
+		};
+	};
+
+	fragment@1 {
+		target-path = "/display@feb00000/ports";
+		__overlay__ {
+			port@1 {
+				endpoint {
+					remote-endpoint = <&lvds0_input>;
+				};
+			};
+			port@2 {
+				endpoint {
+					remote-endpoint = <&lvds1_input>;
+				};
+			};
+		};
+	};
+};
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts
new file mode 100644
index 000000000000..601982bba27d
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rcar_du_of_lvds_r8a7791.dts - Legacy LVDS DT bindings conversion for R8A7791
+ *
+ * Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * Based on work from Jyri Sarha <jsarha@ti.com>
+ * Copyright (C) 2015 Texas Instruments
+ */
+
+#include <dt-bindings/clock/renesas-cpg-mssr.h>
+
+/dts-v1/;
+/plugin/;
+/ {
+	fragment@0 {
+		target-path = "/";
+		__overlay__ {
+			#address-cells = <2>;
+			#size-cells = <2>;
+
+			lvds@feb90000 {
+				compatible = "renesas,r8a7791-lvds";
+				reg = <0 0xfeb90000 0 0x1c>;
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@0 {
+						reg = <0>;
+						lvds0_input: endpoint {
+						};
+					};
+					port@1 {
+						reg = <1>;
+						lvds0_out: endpoint {
+						};
+					};
+				};
+			};
+		};
+	};
+
+	fragment@1 {
+		target-path = "/display@feb00000/ports";
+		__overlay__ {
+			port@1 {
+				endpoint {
+					remote-endpoint = <&lvds0_input>;
+				};
+			};
+		};
+	};
+};
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts
new file mode 100644
index 000000000000..1c535954a529
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rcar_du_of_lvds_r8a7793.dts - Legacy LVDS DT bindings conversion for R8A7793
+ *
+ * Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * Based on work from Jyri Sarha <jsarha@ti.com>
+ * Copyright (C) 2015 Texas Instruments
+ */
+
+#include <dt-bindings/clock/renesas-cpg-mssr.h>
+
+/dts-v1/;
+/plugin/;
+/ {
+	fragment@0 {
+		target-path = "/";
+		__overlay__ {
+			#address-cells = <2>;
+			#size-cells = <2>;
+
+			lvds@feb90000 {
+				compatible = "renesas,r8a7793-lvds";
+				reg = <0 0xfeb90000 0 0x1c>;
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@0 {
+						reg = <0>;
+						lvds0_input: endpoint {
+						};
+					};
+					port@1 {
+						reg = <1>;
+						lvds0_out: endpoint {
+						};
+					};
+				};
+			};
+		};
+	};
+
+	fragment@1 {
+		target-path = "/display@feb00000/ports";
+		__overlay__ {
+			port@1 {
+				endpoint {
+					remote-endpoint = <&lvds0_input>;
+				};
+			};
+		};
+	};
+};
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts
new file mode 100644
index 000000000000..44e52101ef05
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rcar_du_of_lvds_r8a7795.dts - Legacy LVDS DT bindings conversion for R8A7795
+ *
+ * Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * Based on work from Jyri Sarha <jsarha@ti.com>
+ * Copyright (C) 2015 Texas Instruments
+ */
+
+#include <dt-bindings/clock/renesas-cpg-mssr.h>
+
+/dts-v1/;
+/plugin/;
+/ {
+	fragment@0 {
+		target-path = "/soc";
+		__overlay__ {
+			#address-cells = <2>;
+			#size-cells = <2>;
+
+			lvds@feb90000 {
+				compatible = "renesas,r8a7795-lvds";
+				reg = <0 0xfeb90000 0 0x14>;
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@0 {
+						reg = <0>;
+						lvds0_input: endpoint {
+						};
+					};
+					port@1 {
+						reg = <1>;
+						lvds0_out: endpoint {
+						};
+					};
+				};
+			};
+		};
+	};
+
+	fragment@1 {
+		target-path = "/soc/display@feb00000/ports";
+		__overlay__ {
+			port@3 {
+				endpoint {
+					remote-endpoint = <&lvds0_input>;
+				};
+			};
+		};
+	};
+};
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts
new file mode 100644
index 000000000000..8f45ebe140bd
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rcar_du_of_lvds_r8a7796.dts - Legacy LVDS DT bindings conversion for R8A7796
+ *
+ * Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * Based on work from Jyri Sarha <jsarha@ti.com>
+ * Copyright (C) 2015 Texas Instruments
+ */
+
+#include <dt-bindings/clock/renesas-cpg-mssr.h>
+
+/dts-v1/;
+/plugin/;
+/ {
+	fragment@0 {
+		target-path = "/soc";
+		__overlay__ {
+			#address-cells = <2>;
+			#size-cells = <2>;
+
+			lvds@feb90000 {
+				compatible = "renesas,r8a7796-lvds";
+				reg = <0 0xfeb90000 0 0x14>;
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@0 {
+						reg = <0>;
+						lvds0_input: endpoint {
+						};
+					};
+					port@1 {
+						reg = <1>;
+						lvds0_out: endpoint {
+						};
+					};
+				};
+			};
+		};
+	};
+
+	fragment@1 {
+		target-path = "/soc/display@feb00000/ports";
+		__overlay__ {
+			port@3 {
+				endpoint {
+					remote-endpoint = <&lvds0_input>;
+				};
+			};
+		};
+	};
+};
-- 
Regards,

Laurent Pinchart

[PATCH v4 09/16] drm: rcar-du: Convert LVDS encoder code to bridge driver

[Laurent Pinchart]

The LVDS encoders used to be described in DT as part of the DU. They now
have their own DT node, linked to the DU using the OF graph bindings.
This allows moving internal LVDS encoder support to a separate driver
modelled as a DRM bridge. Backward compatibility is retained as legacy
DT is patched live to move to the new bindings.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v1:

- Update the SPDX headers to use GPL-2.0 instead of GPL-2.0-only
- Update to the <soc>-lvds compatible string format
---
 drivers/gpu/drm/rcar-du/Kconfig           |   4 +-
 drivers/gpu/drm/rcar-du/Makefile          |   3 +-
 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_lvds.c       | 524 ++++++++++++++++++++++++++++++
 12 files changed, 561 insertions(+), 616 deletions(-)
 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_lvds.c

diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig
index 3f83352a7313..edde8d4b87a3 100644
--- a/drivers/gpu/drm/rcar-du/Kconfig
+++ b/drivers/gpu/drm/rcar-du/Kconfig
@@ -19,8 +19,8 @@ config DRM_RCAR_DW_HDMI
 	  Enable support for R-Car Gen3 internal HDMI encoder.
 
 config DRM_RCAR_LVDS
-	bool "R-Car DU LVDS Encoder Support"
-	depends on DRM_RCAR_DU
+	tristate "R-Car DU LVDS Encoder Support"
+	depends on DRM && DRM_BRIDGE && OF
 	select DRM_PANEL
 	select OF_FLATTREE
 	select OF_OVERLAY
diff --git a/drivers/gpu/drm/rcar-du/Makefile b/drivers/gpu/drm/rcar-du/Makefile
index 86b337b4be5d..3e58ed93d5b1 100644
--- a/drivers/gpu/drm/rcar-du/Makefile
+++ b/drivers/gpu/drm/rcar-du/Makefile
@@ -4,10 +4,8 @@ rcar-du-drm-y := rcar_du_crtc.o \
 		 rcar_du_encoder.o \
 		 rcar_du_group.o \
 		 rcar_du_kms.o \
-		 rcar_du_lvdscon.o \
 		 rcar_du_plane.o
 
-rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS)	+= rcar_du_lvdsenc.o
 rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS)	+= rcar_du_of.o \
 					   rcar_du_of_lvds_r8a7790.dtb.o \
 					   rcar_du_of_lvds_r8a7791.dtb.o \
@@ -18,3 +16,4 @@ rcar-du-drm-$(CONFIG_DRM_RCAR_VSP)	+= rcar_du_vsp.o
 
 obj-$(CONFIG_DRM_RCAR_DU)		+= rcar-du-drm.o
 obj-$(CONFIG_DRM_RCAR_DW_HDMI)		+= rcar_dw_hdmi.o
+obj-$(CONFIG_DRM_RCAR_LVDS)		+= rcar_lvds.o
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
index 6e02c762a557..06a3fbdd728a 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
@@ -29,6 +29,7 @@
 
 #include "rcar_du_drv.h"
 #include "rcar_du_kms.h"
+#include "rcar_du_of.h"
 #include "rcar_du_regs.h"
 
 /* -----------------------------------------------------------------------------
@@ -74,7 +75,6 @@ static const struct rcar_du_device_info rzg1_du_r8a7745_info = {
 			.port = 1,
 		},
 	},
-	.num_lvds = 0,
 };
 
 static const struct rcar_du_device_info rcar_du_r8a7779_info = {
@@ -95,14 +95,13 @@ static const struct rcar_du_device_info rcar_du_r8a7779_info = {
 			.port = 1,
 		},
 	},
-	.num_lvds = 0,
 };
 
 static const struct rcar_du_device_info rcar_du_r8a7790_info = {
 	.gen = 2,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
-	.quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
+	.quirks = RCAR_DU_QUIRK_ALIGN_128B,
 	.num_crtcs = 3,
 	.routes = {
 		/*
@@ -164,7 +163,6 @@ static const struct rcar_du_device_info rcar_du_r8a7792_info = {
 			.port = 1,
 		},
 	},
-	.num_lvds = 0,
 };
 
 static const struct rcar_du_device_info rcar_du_r8a7794_info = {
@@ -186,7 +184,6 @@ static const struct rcar_du_device_info rcar_du_r8a7794_info = {
 			.port = 1,
 		},
 	},
-	.num_lvds = 0,
 };
 
 static const struct rcar_du_device_info rcar_du_r8a7795_info = {
@@ -434,7 +431,19 @@ static struct platform_driver rcar_du_platform_driver = {
 	},
 };
 
-module_platform_driver(rcar_du_platform_driver);
+static int __init rcar_du_init(void)
+{
+	rcar_du_of_init(rcar_du_of_table);
+
+	return platform_driver_register(&rcar_du_platform_driver);
+}
+module_init(rcar_du_init);
+
+static void __exit rcar_du_exit(void)
+{
+	platform_driver_unregister(&rcar_du_platform_driver);
+}
+module_exit(rcar_du_exit);
 
 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
 MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
index f400fde65a0c..5c7ec15818c7 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
@@ -26,14 +26,12 @@ struct device;
 struct drm_device;
 struct drm_fbdev_cma;
 struct rcar_du_device;
-struct rcar_du_lvdsenc;
 
 #define RCAR_DU_FEATURE_CRTC_IRQ_CLOCK	(1 << 0)	/* Per-CRTC IRQ and clock */
 #define RCAR_DU_FEATURE_EXT_CTRL_REGS	(1 << 1)	/* Has extended control registers */
 #define RCAR_DU_FEATURE_VSP1_SOURCE	(1 << 2)	/* Has inputs from VSP1 */
 
 #define RCAR_DU_QUIRK_ALIGN_128B	(1 << 0)	/* Align pitches to 128 bytes */
-#define RCAR_DU_QUIRK_LVDS_LANES	(1 << 1)	/* LVDS lanes 1 and 3 inverted */
 
 /*
  * struct rcar_du_output_routing - Output routing specification
@@ -70,7 +68,6 @@ struct rcar_du_device_info {
 
 #define RCAR_DU_MAX_CRTCS		4
 #define RCAR_DU_MAX_GROUPS		DIV_ROUND_UP(RCAR_DU_MAX_CRTCS, 2)
-#define RCAR_DU_MAX_LVDS		2
 #define RCAR_DU_MAX_VSPS		4
 
 struct rcar_du_device {
@@ -96,8 +93,6 @@ struct rcar_du_device {
 
 	unsigned int dpad0_source;
 	unsigned int vspd1_sink;
-
-	struct rcar_du_lvdsenc *lvds[RCAR_DU_MAX_LVDS];
 };
 
 static inline bool rcar_du_has(struct rcar_du_device *rcdu,
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
index ba8d2804c1d1..f9c933d3bae6 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
@@ -21,134 +21,22 @@
 #include "rcar_du_drv.h"
 #include "rcar_du_encoder.h"
 #include "rcar_du_kms.h"
-#include "rcar_du_lvdscon.h"
-#include "rcar_du_lvdsenc.h"
 
 /* -----------------------------------------------------------------------------
  * Encoder
  */
 
-static void rcar_du_encoder_disable(struct drm_encoder *encoder)
-{
-	struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
-
-	if (renc->connector && renc->connector->panel) {
-		drm_panel_disable(renc->connector->panel);
-		drm_panel_unprepare(renc->connector->panel);
-	}
-
-	if (renc->lvds)
-		rcar_du_lvdsenc_enable(renc->lvds, encoder->crtc, false);
-}
-
-static void rcar_du_encoder_enable(struct drm_encoder *encoder)
-{
-	struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
-
-	if (renc->lvds)
-		rcar_du_lvdsenc_enable(renc->lvds, encoder->crtc, true);
-
-	if (renc->connector && renc->connector->panel) {
-		drm_panel_prepare(renc->connector->panel);
-		drm_panel_enable(renc->connector->panel);
-	}
-}
-
-static int rcar_du_encoder_atomic_check(struct drm_encoder *encoder,
-					struct drm_crtc_state *crtc_state,
-					struct drm_connector_state *conn_state)
-{
-	struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
-	struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
-	const struct drm_display_mode *mode = &crtc_state->mode;
-	struct drm_connector *connector = conn_state->connector;
-	struct drm_device *dev = encoder->dev;
-
-	/*
-	 * Only panel-related encoder types require validation here, everything
-	 * else is handled by the bridge drivers.
-	 */
-	if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS) {
-		const struct drm_display_mode *panel_mode;
-
-		if (list_empty(&connector->modes)) {
-			dev_dbg(dev->dev, "encoder: empty modes list\n");
-			return -EINVAL;
-		}
-
-		panel_mode = list_first_entry(&connector->modes,
-					      struct drm_display_mode, head);
-
-		/* We're not allowed to modify the resolution. */
-		if (mode->hdisplay != panel_mode->hdisplay ||
-		    mode->vdisplay != panel_mode->vdisplay)
-			return -EINVAL;
-
-		/*
-		 * The flat panel mode is fixed, just copy it to the adjusted
-		 * mode.
-		 */
-		drm_mode_copy(adjusted_mode, panel_mode);
-	}
-
-	if (renc->lvds)
-		rcar_du_lvdsenc_atomic_check(renc->lvds, adjusted_mode);
-
-	return 0;
-}
-
 static void rcar_du_encoder_mode_set(struct drm_encoder *encoder,
 				     struct drm_crtc_state *crtc_state,
 				     struct drm_connector_state *conn_state)
 {
 	struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
-	struct drm_display_info *info = &conn_state->connector->display_info;
-	enum rcar_lvds_mode mode;
 
 	rcar_du_crtc_route_output(crtc_state->crtc, renc->output);
-
-	if (!renc->lvds) {
-		/*
-		 * The DU driver creates connectors only for the outputs of the
-		 * internal LVDS encoders.
-		 */
-		renc->connector = NULL;
-		return;
-	}
-
-	renc->connector = to_rcar_connector(conn_state->connector);
-
-	if (!info->num_bus_formats || !info->bus_formats) {
-		dev_err(encoder->dev->dev, "no LVDS bus format reported\n");
-		return;
-	}
-
-	switch (info->bus_formats[0]) {
-	case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
-	case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
-		mode = RCAR_LVDS_MODE_JEIDA;
-		break;
-	case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
-		mode = RCAR_LVDS_MODE_VESA;
-		break;
-	default:
-		dev_err(encoder->dev->dev,
-			"unsupported LVDS bus format 0x%04x\n",
-			info->bus_formats[0]);
-		return;
-	}
-
-	if (info->bus_flags & DRM_BUS_FLAG_DATA_LSB_TO_MSB)
-		mode |= RCAR_LVDS_MODE_MIRROR;
-
-	rcar_du_lvdsenc_set_mode(renc->lvds, mode);
 }
 
 static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
 	.atomic_mode_set = rcar_du_encoder_mode_set,
-	.disable = rcar_du_encoder_disable,
-	.enable = rcar_du_encoder_enable,
-	.atomic_check = rcar_du_encoder_atomic_check,
 };
 
 static const struct drm_encoder_funcs encoder_funcs = {
@@ -172,33 +60,14 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu,
 	renc->output = output;
 	encoder = rcar_encoder_to_drm_encoder(renc);
 
-	switch (output) {
-	case RCAR_DU_OUTPUT_LVDS0:
-		renc->lvds = rcdu->lvds[0];
-		break;
+	dev_dbg(rcdu->dev, "initializing encoder %pOF for output %u\n",
+		enc_node, output);
 
-	case RCAR_DU_OUTPUT_LVDS1:
-		renc->lvds = rcdu->lvds[1];
-		break;
-
-	default:
-		break;
-	}
-
-	if (enc_node) {
-		dev_dbg(rcdu->dev, "initializing encoder %pOF for output %u\n",
-			enc_node, output);
-
-		/* Locate the DRM bridge from the encoder DT node. */
-		bridge = of_drm_find_bridge(enc_node);
-		if (!bridge) {
-			ret = -EPROBE_DEFER;
-			goto done;
-		}
-	} else {
-		dev_dbg(rcdu->dev,
-			"initializing internal encoder for output %u\n",
-			output);
+	/* Locate the DRM bridge from the encoder DT node. */
+	bridge = of_drm_find_bridge(enc_node);
+	if (!bridge) {
+		ret = -EPROBE_DEFER;
+		goto done;
 	}
 
 	ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
@@ -208,28 +77,14 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu,
 
 	drm_encoder_helper_add(encoder, &encoder_helper_funcs);
 
-	if (bridge) {
-		/*
-		 * Attach the bridge to the encoder. The bridge will create the
-		 * connector.
-		 */
-		ret = drm_bridge_attach(encoder, bridge, NULL);
-		if (ret) {
-			drm_encoder_cleanup(encoder);
-			return ret;
-		}
-	} else {
-		/* There's no bridge, create the connector manually. */
-		switch (output) {
-		case RCAR_DU_OUTPUT_LVDS0:
-		case RCAR_DU_OUTPUT_LVDS1:
-			ret = rcar_du_lvds_connector_init(rcdu, renc, con_node);
-			break;
-
-		default:
-			ret = -EINVAL;
-			break;
-		}
+	/*
+	 * Attach the bridge to the encoder. The bridge will create the
+	 * connector.
+	 */
+	ret = drm_bridge_attach(encoder, bridge, NULL);
+	if (ret) {
+		drm_encoder_cleanup(encoder);
+		return ret;
 	}
 
 done:
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_encoder.h b/drivers/gpu/drm/rcar-du/rcar_du_encoder.h
index 5422fa4df272..2d2abcacd169 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_encoder.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_encoder.h
@@ -19,13 +19,10 @@
 
 struct drm_panel;
 struct rcar_du_device;
-struct rcar_du_lvdsenc;
 
 struct rcar_du_encoder {
 	struct drm_encoder base;
 	enum rcar_du_output output;
-	struct rcar_du_connector *connector;
-	struct rcar_du_lvdsenc *lvds;
 };
 
 #define to_rcar_encoder(e) \
@@ -33,15 +30,6 @@ struct rcar_du_encoder {
 
 #define rcar_encoder_to_drm_encoder(e)	(&(e)->base)
 
-struct rcar_du_connector {
-	struct drm_connector connector;
-	struct rcar_du_encoder *encoder;
-	struct drm_panel *panel;
-};
-
-#define to_rcar_connector(c) \
-	container_of(c, struct rcar_du_connector, connector)
-
 int rcar_du_encoder_init(struct rcar_du_device *rcdu,
 			 enum rcar_du_output output,
 			 struct device_node *enc_node,
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index 566d1a948c8f..0329b354bfa0 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -27,7 +27,6 @@
 #include "rcar_du_drv.h"
 #include "rcar_du_encoder.h"
 #include "rcar_du_kms.h"
-#include "rcar_du_lvdsenc.h"
 #include "rcar_du_regs.h"
 #include "rcar_du_vsp.h"
 
@@ -341,11 +340,10 @@ static int rcar_du_encoders_init_one(struct rcar_du_device *rcdu,
 	of_node_put(entity_ep_node);
 
 	if (!encoder) {
-		/*
-		 * If no encoder has been found the entity must be the
-		 * connector.
-		 */
-		connector = entity;
+		dev_warn(rcdu->dev,
+			 "no encoder found for endpoint %pOF, skipping\n",
+			 ep->local_node);
+		return -ENODEV;
 	}
 
 	ret = rcar_du_encoder_init(rcdu, output, encoder, connector);
@@ -595,10 +593,6 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
 	}
 
 	/* Initialize the encoders. */
-	ret = rcar_du_lvdsenc_init(rcdu);
-	if (ret < 0)
-		return ret;
-
 	ret = rcar_du_encoders_init(rcdu);
 	if (ret < 0)
 		return ret;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c b/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c
deleted file mode 100644
index e96f2df0c305..000000000000
--- a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * rcar_du_lvdscon.c  --  R-Car Display Unit LVDS Connector
- *
- * Copyright (C) 2013-2014 Renesas Electronics Corporation
- *
- * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <drm/drmP.h>
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_crtc.h>
-#include <drm/drm_crtc_helper.h>
-#include <drm/drm_panel.h>
-
-#include <video/display_timing.h>
-#include <video/of_display_timing.h>
-#include <video/videomode.h>
-
-#include "rcar_du_drv.h"
-#include "rcar_du_encoder.h"
-#include "rcar_du_kms.h"
-#include "rcar_du_lvdscon.h"
-
-static int rcar_du_lvds_connector_get_modes(struct drm_connector *connector)
-{
-	struct rcar_du_connector *rcon = to_rcar_connector(connector);
-
-	return drm_panel_get_modes(rcon->panel);
-}
-
-static const struct drm_connector_helper_funcs connector_helper_funcs = {
-	.get_modes = rcar_du_lvds_connector_get_modes,
-};
-
-static void rcar_du_lvds_connector_destroy(struct drm_connector *connector)
-{
-	struct rcar_du_connector *rcon = to_rcar_connector(connector);
-
-	drm_panel_detach(rcon->panel);
-	drm_connector_cleanup(connector);
-}
-
-static const struct drm_connector_funcs connector_funcs = {
-	.reset = drm_atomic_helper_connector_reset,
-	.fill_modes = drm_helper_probe_single_connector_modes,
-	.destroy = rcar_du_lvds_connector_destroy,
-	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
-	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
-};
-
-int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
-				struct rcar_du_encoder *renc,
-				const struct device_node *np)
-{
-	struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
-	struct rcar_du_connector *rcon;
-	struct drm_connector *connector;
-	int ret;
-
-	rcon = devm_kzalloc(rcdu->dev, sizeof(*rcon), GFP_KERNEL);
-	if (rcon == NULL)
-		return -ENOMEM;
-
-	connector = &rcon->connector;
-
-	rcon->panel = of_drm_find_panel(np);
-	if (!rcon->panel)
-		return -EPROBE_DEFER;
-
-	ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
-				 DRM_MODE_CONNECTOR_LVDS);
-	if (ret < 0)
-		return ret;
-
-	drm_connector_helper_add(connector, &connector_helper_funcs);
-
-	ret = drm_mode_connector_attach_encoder(connector, encoder);
-	if (ret < 0)
-		return ret;
-
-	ret = drm_panel_attach(rcon->panel, connector);
-	if (ret < 0)
-		return ret;
-
-	rcon->encoder = renc;
-
-	return 0;
-}
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h b/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h
deleted file mode 100644
index 639071dd235c..000000000000
--- a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * rcar_du_lvdscon.h  --  R-Car Display Unit LVDS Connector
- *
- * Copyright (C) 2013-2014 Renesas Electronics Corporation
- *
- * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef __RCAR_DU_LVDSCON_H__
-#define __RCAR_DU_LVDSCON_H__
-
-struct rcar_du_device;
-struct rcar_du_encoder;
-
-int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
-				struct rcar_du_encoder *renc,
-				const struct device_node *np);
-
-#endif /* __RCAR_DU_LVDSCON_H__ */
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c b/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c
deleted file mode 100644
index 4defa8123eb2..000000000000
--- a/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c
+++ /dev/null
@@ -1,238 +0,0 @@
-/*
- * rcar_du_lvdsenc.c  --  R-Car Display Unit LVDS Encoder
- *
- * Copyright (C) 2013-2014 Renesas Electronics Corporation
- *
- * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-
-#include "rcar_du_drv.h"
-#include "rcar_du_encoder.h"
-#include "rcar_du_lvdsenc.h"
-#include "rcar_lvds_regs.h"
-
-struct rcar_du_lvdsenc {
-	struct rcar_du_device *dev;
-
-	unsigned int index;
-	void __iomem *mmio;
-	struct clk *clock;
-	bool enabled;
-
-	enum rcar_lvds_input input;
-	enum rcar_lvds_mode mode;
-};
-
-static void rcar_lvds_write(struct rcar_du_lvdsenc *lvds, u32 reg, u32 data)
-{
-	iowrite32(data, lvds->mmio + reg);
-}
-
-static u32 rcar_lvds_lvdpllcr_gen2(unsigned int freq)
-{
-	if (freq < 39000)
-		return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_38M;
-	else if (freq < 61000)
-		return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_60M;
-	else if (freq < 121000)
-		return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_121M;
-	else
-		return LVDPLLCR_PLLDLYCNT_150M;
-}
-
-static u32 rcar_lvds_lvdpllcr_gen3(unsigned int freq)
-{
-	if (freq < 42000)
-		return LVDPLLCR_PLLDIVCNT_42M;
-	else if (freq < 85000)
-		return LVDPLLCR_PLLDIVCNT_85M;
-	else if (freq < 128000)
-		return LVDPLLCR_PLLDIVCNT_128M;
-	else
-		return LVDPLLCR_PLLDIVCNT_148M;
-}
-
-static int rcar_du_lvdsenc_start(struct rcar_du_lvdsenc *lvds,
-				 struct rcar_du_crtc *rcrtc)
-{
-	const struct drm_display_mode *mode = &rcrtc->crtc.mode;
-	u32 lvdpllcr;
-	u32 lvdhcr;
-	u32 lvdcr0;
-	int ret;
-
-	if (lvds->enabled)
-		return 0;
-
-	ret = clk_prepare_enable(lvds->clock);
-	if (ret < 0)
-		return ret;
-
-	/*
-	 * Hardcode the channels and control signals routing for now.
-	 *
-	 * HSYNC -> CTRL0
-	 * VSYNC -> CTRL1
-	 * DISP  -> CTRL2
-	 * 0     -> CTRL3
-	 */
-	rcar_lvds_write(lvds, LVDCTRCR, LVDCTRCR_CTR3SEL_ZERO |
-			LVDCTRCR_CTR2SEL_DISP | LVDCTRCR_CTR1SEL_VSYNC |
-			LVDCTRCR_CTR0SEL_HSYNC);
-
-	if (rcar_du_needs(lvds->dev, RCAR_DU_QUIRK_LVDS_LANES))
-		lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 3)
-		       | LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 1);
-	else
-		lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 1)
-		       | LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 3);
-
-	rcar_lvds_write(lvds, LVDCHCR, lvdhcr);
-
-	/* PLL clock configuration. */
-	if (lvds->dev->info->gen < 3)
-		lvdpllcr = rcar_lvds_lvdpllcr_gen2(mode->clock);
-	else
-		lvdpllcr = rcar_lvds_lvdpllcr_gen3(mode->clock);
-	rcar_lvds_write(lvds, LVDPLLCR, lvdpllcr);
-
-	/* Set the LVDS mode and select the input. */
-	lvdcr0 = lvds->mode << LVDCR0_LVMD_SHIFT;
-	if (rcrtc->index == 2)
-		lvdcr0 |= LVDCR0_DUSEL;
-	rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-
-	/* Turn all the channels on. */
-	rcar_lvds_write(lvds, LVDCR1,
-			LVDCR1_CHSTBY(3) | LVDCR1_CHSTBY(2) |
-			LVDCR1_CHSTBY(1) | LVDCR1_CHSTBY(0) | LVDCR1_CLKSTBY);
-
-	if (lvds->dev->info->gen < 3) {
-		/* Enable LVDS operation and turn the bias circuitry on. */
-		lvdcr0 |= LVDCR0_BEN | LVDCR0_LVEN;
-		rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-	}
-
-	/* Turn the PLL on. */
-	lvdcr0 |= LVDCR0_PLLON;
-	rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-
-	if (lvds->dev->info->gen > 2) {
-		/* Set LVDS normal mode. */
-		lvdcr0 |= LVDCR0_PWD;
-		rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-	}
-
-	/* Wait for the startup delay. */
-	usleep_range(100, 150);
-
-	/* Turn the output on. */
-	lvdcr0 |= LVDCR0_LVRES;
-	rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-
-	lvds->enabled = true;
-
-	return 0;
-}
-
-static void rcar_du_lvdsenc_stop(struct rcar_du_lvdsenc *lvds)
-{
-	if (!lvds->enabled)
-		return;
-
-	rcar_lvds_write(lvds, LVDCR0, 0);
-	rcar_lvds_write(lvds, LVDCR1, 0);
-
-	clk_disable_unprepare(lvds->clock);
-
-	lvds->enabled = false;
-}
-
-int rcar_du_lvdsenc_enable(struct rcar_du_lvdsenc *lvds, struct drm_crtc *crtc,
-			   bool enable)
-{
-	if (!enable) {
-		rcar_du_lvdsenc_stop(lvds);
-		return 0;
-	} else if (crtc) {
-		struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
-		return rcar_du_lvdsenc_start(lvds, rcrtc);
-	} else
-		return -EINVAL;
-}
-
-void rcar_du_lvdsenc_atomic_check(struct rcar_du_lvdsenc *lvds,
-				  struct drm_display_mode *mode)
-{
-	/*
-	 * The internal LVDS encoder has a restricted clock frequency operating
-	 * range (31MHz to 148.5MHz). Clamp the clock accordingly.
-	 */
-	mode->clock = clamp(mode->clock, 31000, 148500);
-}
-
-void rcar_du_lvdsenc_set_mode(struct rcar_du_lvdsenc *lvds,
-			      enum rcar_lvds_mode mode)
-{
-	lvds->mode = mode;
-}
-
-static int rcar_du_lvdsenc_get_resources(struct rcar_du_lvdsenc *lvds,
-					 struct platform_device *pdev)
-{
-	struct resource *mem;
-	char name[7];
-
-	sprintf(name, "lvds.%u", lvds->index);
-
-	mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
-	lvds->mmio = devm_ioremap_resource(&pdev->dev, mem);
-	if (IS_ERR(lvds->mmio))
-		return PTR_ERR(lvds->mmio);
-
-	lvds->clock = devm_clk_get(&pdev->dev, name);
-	if (IS_ERR(lvds->clock)) {
-		dev_err(&pdev->dev, "failed to get clock for %s\n", name);
-		return PTR_ERR(lvds->clock);
-	}
-
-	return 0;
-}
-
-int rcar_du_lvdsenc_init(struct rcar_du_device *rcdu)
-{
-	struct platform_device *pdev = to_platform_device(rcdu->dev);
-	struct rcar_du_lvdsenc *lvds;
-	unsigned int i;
-	int ret;
-
-	for (i = 0; i < rcdu->info->num_lvds; ++i) {
-		lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);
-		if (lvds == NULL)
-			return -ENOMEM;
-
-		lvds->dev = rcdu;
-		lvds->index = i;
-		lvds->input = i ? RCAR_LVDS_INPUT_DU1 : RCAR_LVDS_INPUT_DU0;
-		lvds->enabled = false;
-
-		ret = rcar_du_lvdsenc_get_resources(lvds, pdev);
-		if (ret < 0)
-			return ret;
-
-		rcdu->lvds[i] = lvds;
-	}
-
-	return 0;
-}
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.h b/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.h
deleted file mode 100644
index 7218ac89333e..000000000000
--- a/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.h
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * rcar_du_lvdsenc.h  --  R-Car Display Unit LVDS Encoder
- *
- * Copyright (C) 2013-2014 Renesas Electronics Corporation
- *
- * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef __RCAR_DU_LVDSENC_H__
-#define __RCAR_DU_LVDSENC_H__
-
-#include <linux/io.h>
-#include <linux/module.h>
-
-struct rcar_drm_crtc;
-struct rcar_du_lvdsenc;
-
-enum rcar_lvds_input {
-	RCAR_LVDS_INPUT_DU0,
-	RCAR_LVDS_INPUT_DU1,
-	RCAR_LVDS_INPUT_DU2,
-};
-
-/* Keep in sync with the LVDCR0.LVMD hardware register values. */
-enum rcar_lvds_mode {
-	RCAR_LVDS_MODE_JEIDA = 0,
-	RCAR_LVDS_MODE_MIRROR = 1,
-	RCAR_LVDS_MODE_VESA = 4,
-};
-
-#if IS_ENABLED(CONFIG_DRM_RCAR_LVDS)
-int rcar_du_lvdsenc_init(struct rcar_du_device *rcdu);
-void rcar_du_lvdsenc_set_mode(struct rcar_du_lvdsenc *lvds,
-			      enum rcar_lvds_mode mode);
-int rcar_du_lvdsenc_enable(struct rcar_du_lvdsenc *lvds,
-			   struct drm_crtc *crtc, bool enable);
-void rcar_du_lvdsenc_atomic_check(struct rcar_du_lvdsenc *lvds,
-				  struct drm_display_mode *mode);
-#else
-static inline int rcar_du_lvdsenc_init(struct rcar_du_device *rcdu)
-{
-	return 0;
-}
-static inline void rcar_du_lvdsenc_set_mode(struct rcar_du_lvdsenc *lvds,
-					    enum rcar_lvds_mode mode)
-{
-}
-static inline int rcar_du_lvdsenc_enable(struct rcar_du_lvdsenc *lvds,
-					 struct drm_crtc *crtc, bool enable)
-{
-	return 0;
-}
-static inline void rcar_du_lvdsenc_atomic_check(struct rcar_du_lvdsenc *lvds,
-						struct drm_display_mode *mode)
-{
-}
-#endif
-
-#endif /* __RCAR_DU_LVDSENC_H__ */
diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c
new file mode 100644
index 000000000000..0a5aa39b1967
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c
@@ -0,0 +1,524 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rcar_lvds.c  --  R-Car LVDS Encoder
+ *
+ * Copyright (C) 2013-2014 Renesas Electronics Corporation
+ *
+ * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_panel.h>
+
+#include "rcar_lvds_regs.h"
+
+/* Keep in sync with the LVDCR0.LVMD hardware register values. */
+enum rcar_lvds_mode {
+	RCAR_LVDS_MODE_JEIDA = 0,
+	RCAR_LVDS_MODE_MIRROR = 1,
+	RCAR_LVDS_MODE_VESA = 4,
+};
+
+#define RCAR_LVDS_QUIRK_LANES	(1 << 0)	/* LVDS lanes 1 and 3 inverted */
+
+struct rcar_lvds_device_info {
+	unsigned int gen;
+	unsigned int quirks;
+};
+
+struct rcar_lvds {
+	struct device *dev;
+	const struct rcar_lvds_device_info *info;
+
+	struct drm_bridge bridge;
+
+	struct drm_bridge *next_bridge;
+	struct drm_connector connector;
+	struct drm_panel *panel;
+
+	void __iomem *mmio;
+	struct clk *clock;
+	bool enabled;
+
+	struct drm_display_mode display_mode;
+	enum rcar_lvds_mode mode;
+};
+
+#define bridge_to_rcar_lvds(bridge) \
+	container_of(bridge, struct rcar_lvds, bridge)
+
+#define connector_to_rcar_lvds(connector) \
+	container_of(connector, struct rcar_lvds, connector)
+
+static void rcar_lvds_write(struct rcar_lvds *lvds, u32 reg, u32 data)
+{
+	iowrite32(data, lvds->mmio + reg);
+}
+
+/* -----------------------------------------------------------------------------
+ * Connector & Panel
+ */
+
+static int rcar_lvds_connector_get_modes(struct drm_connector *connector)
+{
+	struct rcar_lvds *lvds = connector_to_rcar_lvds(connector);
+
+	return drm_panel_get_modes(lvds->panel);
+}
+
+static int rcar_lvds_connector_atomic_check(struct drm_connector *connector,
+					    struct drm_connector_state *state)
+{
+	struct rcar_lvds *lvds = connector_to_rcar_lvds(connector);
+	const struct drm_display_mode *panel_mode;
+	struct drm_crtc_state *crtc_state;
+
+	if (list_empty(&connector->modes)) {
+		dev_dbg(lvds->dev, "connector: empty modes list\n");
+		return -EINVAL;
+	}
+
+	panel_mode = list_first_entry(&connector->modes,
+				      struct drm_display_mode, head);
+
+	/* We're not allowed to modify the resolution. */
+	crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
+	if (IS_ERR(crtc_state))
+		return PTR_ERR(crtc_state);
+
+	if (crtc_state->mode.hdisplay != panel_mode->hdisplay ||
+	    crtc_state->mode.vdisplay != panel_mode->vdisplay)
+		return -EINVAL;
+
+	/* The flat panel mode is fixed, just copy it to the adjusted mode. */
+	drm_mode_copy(&crtc_state->adjusted_mode, panel_mode);
+
+	return 0;
+}
+
+static const struct drm_connector_helper_funcs rcar_lvds_conn_helper_funcs = {
+	.get_modes = rcar_lvds_connector_get_modes,
+	.atomic_check = rcar_lvds_connector_atomic_check,
+};
+
+static const struct drm_connector_funcs rcar_lvds_conn_funcs = {
+	.reset = drm_atomic_helper_connector_reset,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = drm_connector_cleanup,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+/* -----------------------------------------------------------------------------
+ * Bridge
+ */
+
+static u32 rcar_lvds_lvdpllcr_gen2(unsigned int freq)
+{
+	if (freq < 39000)
+		return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_38M;
+	else if (freq < 61000)
+		return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_60M;
+	else if (freq < 121000)
+		return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_121M;
+	else
+		return LVDPLLCR_PLLDLYCNT_150M;
+}
+
+static u32 rcar_lvds_lvdpllcr_gen3(unsigned int freq)
+{
+	if (freq < 42000)
+		return LVDPLLCR_PLLDIVCNT_42M;
+	else if (freq < 85000)
+		return LVDPLLCR_PLLDIVCNT_85M;
+	else if (freq < 128000)
+		return LVDPLLCR_PLLDIVCNT_128M;
+	else
+		return LVDPLLCR_PLLDIVCNT_148M;
+}
+
+static void rcar_lvds_enable(struct drm_bridge *bridge)
+{
+	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
+	const struct drm_display_mode *mode = &lvds->display_mode;
+	/*
+	 * FIXME: We should really retrieve the CRTC through the state, but how
+	 * do we get a state pointer?
+	 */
+	struct drm_crtc *crtc = lvds->bridge.encoder->crtc;
+	u32 lvdpllcr;
+	u32 lvdhcr;
+	u32 lvdcr0;
+	int ret;
+
+	WARN_ON(lvds->enabled);
+
+	ret = clk_prepare_enable(lvds->clock);
+	if (ret < 0)
+		return;
+
+	/*
+	 * Hardcode the channels and control signals routing for now.
+	 *
+	 * HSYNC -> CTRL0
+	 * VSYNC -> CTRL1
+	 * DISP  -> CTRL2
+	 * 0     -> CTRL3
+	 */
+	rcar_lvds_write(lvds, LVDCTRCR, LVDCTRCR_CTR3SEL_ZERO |
+			LVDCTRCR_CTR2SEL_DISP | LVDCTRCR_CTR1SEL_VSYNC |
+			LVDCTRCR_CTR0SEL_HSYNC);
+
+	if (lvds->info->quirks & RCAR_LVDS_QUIRK_LANES)
+		lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 3)
+		       | LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 1);
+	else
+		lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 1)
+		       | LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 3);
+
+	rcar_lvds_write(lvds, LVDCHCR, lvdhcr);
+
+	/* PLL clock configuration. */
+	if (lvds->info->gen < 3)
+		lvdpllcr = rcar_lvds_lvdpllcr_gen2(mode->clock);
+	else
+		lvdpllcr = rcar_lvds_lvdpllcr_gen3(mode->clock);
+	rcar_lvds_write(lvds, LVDPLLCR, lvdpllcr);
+
+	/* Set the LVDS mode and select the input. */
+	lvdcr0 = lvds->mode << LVDCR0_LVMD_SHIFT;
+	if (drm_crtc_index(crtc) == 2)
+		lvdcr0 |= LVDCR0_DUSEL;
+	rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+
+	/* Turn all the channels on. */
+	rcar_lvds_write(lvds, LVDCR1,
+			LVDCR1_CHSTBY(3) | LVDCR1_CHSTBY(2) |
+			LVDCR1_CHSTBY(1) | LVDCR1_CHSTBY(0) | LVDCR1_CLKSTBY);
+
+	if (lvds->info->gen < 3) {
+		/* Enable LVDS operation and turn the bias circuitry on. */
+		lvdcr0 |= LVDCR0_BEN | LVDCR0_LVEN;
+		rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+	}
+
+	/* Turn the PLL on. */
+	lvdcr0 |= LVDCR0_PLLON;
+	rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+
+	if (lvds->info->gen > 2) {
+		/* Set LVDS normal mode. */
+		lvdcr0 |= LVDCR0_PWD;
+		rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+	}
+
+	/* Wait for the startup delay. */
+	usleep_range(100, 150);
+
+	/* Turn the output on. */
+	lvdcr0 |= LVDCR0_LVRES;
+	rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+
+	if (lvds->panel) {
+		drm_panel_prepare(lvds->panel);
+		drm_panel_enable(lvds->panel);
+	}
+
+	lvds->enabled = true;
+}
+
+static void rcar_lvds_disable(struct drm_bridge *bridge)
+{
+	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
+
+	WARN_ON(!lvds->enabled);
+
+	if (lvds->panel) {
+		drm_panel_disable(lvds->panel);
+		drm_panel_unprepare(lvds->panel);
+	}
+
+	rcar_lvds_write(lvds, LVDCR0, 0);
+	rcar_lvds_write(lvds, LVDCR1, 0);
+
+	clk_disable_unprepare(lvds->clock);
+
+	lvds->enabled = false;
+}
+
+static bool rcar_lvds_mode_fixup(struct drm_bridge *bridge,
+				 const struct drm_display_mode *mode,
+				 struct drm_display_mode *adjusted_mode)
+{
+	/*
+	 * The internal LVDS encoder has a restricted clock frequency operating
+	 * range (31MHz to 148.5MHz). Clamp the clock accordingly.
+	 */
+	adjusted_mode->clock = clamp(adjusted_mode->clock, 31000, 148500);
+
+	return true;
+}
+
+static void rcar_lvds_get_lvds_mode(struct rcar_lvds *lvds)
+{
+	struct drm_display_info *info = &lvds->connector.display_info;
+	enum rcar_lvds_mode mode;
+
+	/*
+	 * There is no API yet to retrieve LVDS mode from a bridge, only panels
+	 * are supported.
+	 */
+	if (!lvds->panel)
+		return;
+
+	if (!info->num_bus_formats || !info->bus_formats) {
+		dev_err(lvds->dev, "no LVDS bus format reported\n");
+		return;
+	}
+
+	switch (info->bus_formats[0]) {
+	case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
+	case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
+		mode = RCAR_LVDS_MODE_JEIDA;
+		break;
+	case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
+		mode = RCAR_LVDS_MODE_VESA;
+		break;
+	default:
+		dev_err(lvds->dev, "unsupported LVDS bus format 0x%04x\n",
+			info->bus_formats[0]);
+		return;
+	}
+
+	if (info->bus_flags & DRM_BUS_FLAG_DATA_LSB_TO_MSB)
+		mode |= RCAR_LVDS_MODE_MIRROR;
+
+	lvds->mode = mode;
+}
+
+static void rcar_lvds_mode_set(struct drm_bridge *bridge,
+			       struct drm_display_mode *mode,
+			       struct drm_display_mode *adjusted_mode)
+{
+	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
+
+	WARN_ON(lvds->enabled);
+
+	lvds->display_mode = *adjusted_mode;
+
+	rcar_lvds_get_lvds_mode(lvds);
+}
+
+static int rcar_lvds_attach(struct drm_bridge *bridge)
+{
+	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
+	struct drm_connector *connector = &lvds->connector;
+	struct drm_encoder *encoder = bridge->encoder;
+	int ret;
+
+	/* If we have a next bridge just attach it. */
+	if (lvds->next_bridge)
+		return drm_bridge_attach(bridge->encoder, lvds->next_bridge,
+					 bridge);
+
+	/* Otherwise we have a panel, create a connector. */
+	ret = drm_connector_init(bridge->dev, connector, &rcar_lvds_conn_funcs,
+				 DRM_MODE_CONNECTOR_LVDS);
+	if (ret < 0)
+		return ret;
+
+	drm_connector_helper_add(connector, &rcar_lvds_conn_helper_funcs);
+
+	ret = drm_mode_connector_attach_encoder(connector, encoder);
+	if (ret < 0)
+		return ret;
+
+	return drm_panel_attach(lvds->panel, connector);
+}
+
+static void rcar_lvds_detach(struct drm_bridge *bridge)
+{
+	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
+
+	if (lvds->panel)
+		drm_panel_detach(lvds->panel);
+}
+
+static const struct drm_bridge_funcs rcar_lvds_bridge_ops = {
+	.attach = rcar_lvds_attach,
+	.detach = rcar_lvds_detach,
+	.enable = rcar_lvds_enable,
+	.disable = rcar_lvds_disable,
+	.mode_fixup = rcar_lvds_mode_fixup,
+	.mode_set = rcar_lvds_mode_set,
+};
+
+/* -----------------------------------------------------------------------------
+ * Probe & Remove
+ */
+
+static int rcar_lvds_parse_dt(struct rcar_lvds *lvds)
+{
+	struct device_node *local_output = NULL;
+	struct device_node *remote_input = NULL;
+	struct device_node *remote = NULL;
+	struct device_node *node;
+	bool is_bridge = false;
+	int ret = 0;
+
+	local_output = of_graph_get_endpoint_by_regs(lvds->dev->of_node, 1, 0);
+	if (!local_output) {
+		dev_dbg(lvds->dev, "unconnected port@1\n");
+		return -ENODEV;
+	}
+
+	/*
+	 * Locate the connected entity and infer its type from the number of
+	 * endpoints.
+	 */
+	remote = of_graph_get_remote_port_parent(local_output);
+	if (!remote) {
+		dev_dbg(lvds->dev, "unconnected endpoint %pOF\n", local_output);
+		ret = -ENODEV;
+		goto done;
+	}
+
+	if (!of_device_is_available(remote)) {
+		dev_dbg(lvds->dev, "connected entity %pOF is disabled\n",
+			remote);
+		ret = -ENODEV;
+		goto done;
+	}
+
+	remote_input = of_graph_get_remote_endpoint(local_output);
+
+	for_each_endpoint_of_node(remote, node) {
+		if (node != remote_input) {
+			/*
+			 * We've found one endpoint other than the input, this
+			 * must be a bridge.
+			 */
+			is_bridge = true;
+			of_node_put(node);
+			break;
+		}
+	}
+
+	if (is_bridge) {
+		lvds->next_bridge = of_drm_find_bridge(remote);
+		if (!lvds->next_bridge)
+			ret = -EPROBE_DEFER;
+	} else {
+		lvds->panel = of_drm_find_panel(remote);
+		if (!lvds->panel)
+			ret = -EPROBE_DEFER;
+	}
+
+done:
+	of_node_put(local_output);
+	of_node_put(remote_input);
+	of_node_put(remote);
+
+	return ret;
+}
+
+static int rcar_lvds_probe(struct platform_device *pdev)
+{
+	struct rcar_lvds *lvds;
+	struct resource *mem;
+	int ret;
+
+	lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);
+	if (lvds == NULL)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, lvds);
+
+	lvds->dev = &pdev->dev;
+	lvds->info = of_device_get_match_data(&pdev->dev);
+	lvds->enabled = false;
+
+	ret = rcar_lvds_parse_dt(lvds);
+	if (ret < 0)
+		return ret;
+
+	lvds->bridge.driver_private = lvds;
+	lvds->bridge.funcs = &rcar_lvds_bridge_ops;
+	lvds->bridge.of_node = pdev->dev.of_node;
+
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	lvds->mmio = devm_ioremap_resource(&pdev->dev, mem);
+	if (IS_ERR(lvds->mmio))
+		return PTR_ERR(lvds->mmio);
+
+	lvds->clock = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(lvds->clock)) {
+		dev_err(&pdev->dev, "failed to get clock\n");
+		return PTR_ERR(lvds->clock);
+	}
+
+	drm_bridge_add(&lvds->bridge);
+
+	return 0;
+}
+
+static int rcar_lvds_remove(struct platform_device *pdev)
+{
+	struct rcar_lvds *lvds = platform_get_drvdata(pdev);
+
+	drm_bridge_remove(&lvds->bridge);
+
+	return 0;
+}
+
+static const struct rcar_lvds_device_info rcar_lvds_gen2_info = {
+	.gen = 2,
+};
+
+static const struct rcar_lvds_device_info rcar_lvds_r8a7790_info = {
+	.gen = 2,
+	.quirks = RCAR_LVDS_QUIRK_LANES,
+};
+
+static const struct rcar_lvds_device_info rcar_lvds_gen3_info = {
+	.gen = 3,
+};
+
+static const struct of_device_id rcar_lvds_of_table[] = {
+	{ .compatible = "renesas,r8a7743-lvds", .data = &rcar_lvds_gen2_info },
+	{ .compatible = "renesas,r8a7790-lvds", .data = &rcar_lvds_r8a7790_info },
+	{ .compatible = "renesas,r8a7791-lvds", .data = &rcar_lvds_gen2_info },
+	{ .compatible = "renesas,r8a7793-lvds", .data = &rcar_lvds_gen2_info },
+	{ .compatible = "renesas,r8a7795-lvds", .data = &rcar_lvds_gen3_info },
+	{ .compatible = "renesas,r8a7796-lvds", .data = &rcar_lvds_gen3_info },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(of, rcar_lvds_of_table);
+
+static struct platform_driver rcar_lvds_platform_driver = {
+	.probe		= rcar_lvds_probe,
+	.remove		= rcar_lvds_remove,
+	.driver		= {
+		.name	= "rcar-lvds",
+		.of_match_table = rcar_lvds_of_table,
+	},
+};
+
+module_platform_driver(rcar_lvds_platform_driver);
+
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
+MODULE_DESCRIPTION("Renesas R-Car LVDS Encoder Driver");
+MODULE_LICENSE("GPL");
-- 
Regards,

Laurent Pinchart

[PATCH v4 09/16] drm: rcar-du: Convert LVDS encoder code to bridge driver

[Laurent Pinchart]

The LVDS encoders used to be described in DT as part of the DU. They now
have their own DT node, linked to the DU using the OF graph bindings.
This allows moving internal LVDS encoder support to a separate driver
modelled as a DRM bridge. Backward compatibility is retained as legacy
DT is patched live to move to the new bindings.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v1:

- Update the SPDX headers to use GPL-2.0 instead of GPL-2.0-only
- Update to the <soc>-lvds compatible string format
---
 drivers/gpu/drm/rcar-du/Kconfig           |   4 +-
 drivers/gpu/drm/rcar-du/Makefile          |   3 +-
 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_lvds.c       | 524 ++++++++++++++++++++++++++++++
 12 files changed, 561 insertions(+), 616 deletions(-)
 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_lvds.c

diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig
index 3f83352a7313..edde8d4b87a3 100644
--- a/drivers/gpu/drm/rcar-du/Kconfig
+++ b/drivers/gpu/drm/rcar-du/Kconfig
@@ -19,8 +19,8 @@ config DRM_RCAR_DW_HDMI
 	  Enable support for R-Car Gen3 internal HDMI encoder.
 
 config DRM_RCAR_LVDS
-	bool "R-Car DU LVDS Encoder Support"
-	depends on DRM_RCAR_DU
+	tristate "R-Car DU LVDS Encoder Support"
+	depends on DRM && DRM_BRIDGE && OF
 	select DRM_PANEL
 	select OF_FLATTREE
 	select OF_OVERLAY
diff --git a/drivers/gpu/drm/rcar-du/Makefile b/drivers/gpu/drm/rcar-du/Makefile
index 86b337b4be5d..3e58ed93d5b1 100644
--- a/drivers/gpu/drm/rcar-du/Makefile
+++ b/drivers/gpu/drm/rcar-du/Makefile
@@ -4,10 +4,8 @@ rcar-du-drm-y := rcar_du_crtc.o \
 		 rcar_du_encoder.o \
 		 rcar_du_group.o \
 		 rcar_du_kms.o \
-		 rcar_du_lvdscon.o \
 		 rcar_du_plane.o
 
-rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS)	+= rcar_du_lvdsenc.o
 rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS)	+= rcar_du_of.o \
 					   rcar_du_of_lvds_r8a7790.dtb.o \
 					   rcar_du_of_lvds_r8a7791.dtb.o \
@@ -18,3 +16,4 @@ rcar-du-drm-$(CONFIG_DRM_RCAR_VSP)	+= rcar_du_vsp.o
 
 obj-$(CONFIG_DRM_RCAR_DU)		+= rcar-du-drm.o
 obj-$(CONFIG_DRM_RCAR_DW_HDMI)		+= rcar_dw_hdmi.o
+obj-$(CONFIG_DRM_RCAR_LVDS)		+= rcar_lvds.o
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
index 6e02c762a557..06a3fbdd728a 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
@@ -29,6 +29,7 @@
 
 #include "rcar_du_drv.h"
 #include "rcar_du_kms.h"
+#include "rcar_du_of.h"
 #include "rcar_du_regs.h"
 
 /* -----------------------------------------------------------------------------
@@ -74,7 +75,6 @@ static const struct rcar_du_device_info rzg1_du_r8a7745_info = {
 			.port = 1,
 		},
 	},
-	.num_lvds = 0,
 };
 
 static const struct rcar_du_device_info rcar_du_r8a7779_info = {
@@ -95,14 +95,13 @@ static const struct rcar_du_device_info rcar_du_r8a7779_info = {
 			.port = 1,
 		},
 	},
-	.num_lvds = 0,
 };
 
 static const struct rcar_du_device_info rcar_du_r8a7790_info = {
 	.gen = 2,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
-	.quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
+	.quirks = RCAR_DU_QUIRK_ALIGN_128B,
 	.num_crtcs = 3,
 	.routes = {
 		/*
@@ -164,7 +163,6 @@ static const struct rcar_du_device_info rcar_du_r8a7792_info = {
 			.port = 1,
 		},
 	},
-	.num_lvds = 0,
 };
 
 static const struct rcar_du_device_info rcar_du_r8a7794_info = {
@@ -186,7 +184,6 @@ static const struct rcar_du_device_info rcar_du_r8a7794_info = {
 			.port = 1,
 		},
 	},
-	.num_lvds = 0,
 };
 
 static const struct rcar_du_device_info rcar_du_r8a7795_info = {
@@ -434,7 +431,19 @@ static struct platform_driver rcar_du_platform_driver = {
 	},
 };
 
-module_platform_driver(rcar_du_platform_driver);
+static int __init rcar_du_init(void)
+{
+	rcar_du_of_init(rcar_du_of_table);
+
+	return platform_driver_register(&rcar_du_platform_driver);
+}
+module_init(rcar_du_init);
+
+static void __exit rcar_du_exit(void)
+{
+	platform_driver_unregister(&rcar_du_platform_driver);
+}
+module_exit(rcar_du_exit);
 
 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
 MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
index f400fde65a0c..5c7ec15818c7 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
@@ -26,14 +26,12 @@ struct device;
 struct drm_device;
 struct drm_fbdev_cma;
 struct rcar_du_device;
-struct rcar_du_lvdsenc;
 
 #define RCAR_DU_FEATURE_CRTC_IRQ_CLOCK	(1 << 0)	/* Per-CRTC IRQ and clock */
 #define RCAR_DU_FEATURE_EXT_CTRL_REGS	(1 << 1)	/* Has extended control registers */
 #define RCAR_DU_FEATURE_VSP1_SOURCE	(1 << 2)	/* Has inputs from VSP1 */
 
 #define RCAR_DU_QUIRK_ALIGN_128B	(1 << 0)	/* Align pitches to 128 bytes */
-#define RCAR_DU_QUIRK_LVDS_LANES	(1 << 1)	/* LVDS lanes 1 and 3 inverted */
 
 /*
  * struct rcar_du_output_routing - Output routing specification
@@ -70,7 +68,6 @@ struct rcar_du_device_info {
 
 #define RCAR_DU_MAX_CRTCS		4
 #define RCAR_DU_MAX_GROUPS		DIV_ROUND_UP(RCAR_DU_MAX_CRTCS, 2)
-#define RCAR_DU_MAX_LVDS		2
 #define RCAR_DU_MAX_VSPS		4
 
 struct rcar_du_device {
@@ -96,8 +93,6 @@ struct rcar_du_device {
 
 	unsigned int dpad0_source;
 	unsigned int vspd1_sink;
-
-	struct rcar_du_lvdsenc *lvds[RCAR_DU_MAX_LVDS];
 };
 
 static inline bool rcar_du_has(struct rcar_du_device *rcdu,
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
index ba8d2804c1d1..f9c933d3bae6 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
@@ -21,134 +21,22 @@
 #include "rcar_du_drv.h"
 #include "rcar_du_encoder.h"
 #include "rcar_du_kms.h"
-#include "rcar_du_lvdscon.h"
-#include "rcar_du_lvdsenc.h"
 
 /* -----------------------------------------------------------------------------
  * Encoder
  */
 
-static void rcar_du_encoder_disable(struct drm_encoder *encoder)
-{
-	struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
-
-	if (renc->connector && renc->connector->panel) {
-		drm_panel_disable(renc->connector->panel);
-		drm_panel_unprepare(renc->connector->panel);
-	}
-
-	if (renc->lvds)
-		rcar_du_lvdsenc_enable(renc->lvds, encoder->crtc, false);
-}
-
-static void rcar_du_encoder_enable(struct drm_encoder *encoder)
-{
-	struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
-
-	if (renc->lvds)
-		rcar_du_lvdsenc_enable(renc->lvds, encoder->crtc, true);
-
-	if (renc->connector && renc->connector->panel) {
-		drm_panel_prepare(renc->connector->panel);
-		drm_panel_enable(renc->connector->panel);
-	}
-}
-
-static int rcar_du_encoder_atomic_check(struct drm_encoder *encoder,
-					struct drm_crtc_state *crtc_state,
-					struct drm_connector_state *conn_state)
-{
-	struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
-	struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
-	const struct drm_display_mode *mode = &crtc_state->mode;
-	struct drm_connector *connector = conn_state->connector;
-	struct drm_device *dev = encoder->dev;
-
-	/*
-	 * Only panel-related encoder types require validation here, everything
-	 * else is handled by the bridge drivers.
-	 */
-	if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS) {
-		const struct drm_display_mode *panel_mode;
-
-		if (list_empty(&connector->modes)) {
-			dev_dbg(dev->dev, "encoder: empty modes list\n");
-			return -EINVAL;
-		}
-
-		panel_mode = list_first_entry(&connector->modes,
-					      struct drm_display_mode, head);
-
-		/* We're not allowed to modify the resolution. */
-		if (mode->hdisplay != panel_mode->hdisplay ||
-		    mode->vdisplay != panel_mode->vdisplay)
-			return -EINVAL;
-
-		/*
-		 * The flat panel mode is fixed, just copy it to the adjusted
-		 * mode.
-		 */
-		drm_mode_copy(adjusted_mode, panel_mode);
-	}
-
-	if (renc->lvds)
-		rcar_du_lvdsenc_atomic_check(renc->lvds, adjusted_mode);
-
-	return 0;
-}
-
 static void rcar_du_encoder_mode_set(struct drm_encoder *encoder,
 				     struct drm_crtc_state *crtc_state,
 				     struct drm_connector_state *conn_state)
 {
 	struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
-	struct drm_display_info *info = &conn_state->connector->display_info;
-	enum rcar_lvds_mode mode;
 
 	rcar_du_crtc_route_output(crtc_state->crtc, renc->output);
-
-	if (!renc->lvds) {
-		/*
-		 * The DU driver creates connectors only for the outputs of the
-		 * internal LVDS encoders.
-		 */
-		renc->connector = NULL;
-		return;
-	}
-
-	renc->connector = to_rcar_connector(conn_state->connector);
-
-	if (!info->num_bus_formats || !info->bus_formats) {
-		dev_err(encoder->dev->dev, "no LVDS bus format reported\n");
-		return;
-	}
-
-	switch (info->bus_formats[0]) {
-	case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
-	case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
-		mode = RCAR_LVDS_MODE_JEIDA;
-		break;
-	case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
-		mode = RCAR_LVDS_MODE_VESA;
-		break;
-	default:
-		dev_err(encoder->dev->dev,
-			"unsupported LVDS bus format 0x%04x\n",
-			info->bus_formats[0]);
-		return;
-	}
-
-	if (info->bus_flags & DRM_BUS_FLAG_DATA_LSB_TO_MSB)
-		mode |= RCAR_LVDS_MODE_MIRROR;
-
-	rcar_du_lvdsenc_set_mode(renc->lvds, mode);
 }
 
 static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
 	.atomic_mode_set = rcar_du_encoder_mode_set,
-	.disable = rcar_du_encoder_disable,
-	.enable = rcar_du_encoder_enable,
-	.atomic_check = rcar_du_encoder_atomic_check,
 };
 
 static const struct drm_encoder_funcs encoder_funcs = {
@@ -172,33 +60,14 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu,
 	renc->output = output;
 	encoder = rcar_encoder_to_drm_encoder(renc);
 
-	switch (output) {
-	case RCAR_DU_OUTPUT_LVDS0:
-		renc->lvds = rcdu->lvds[0];
-		break;
+	dev_dbg(rcdu->dev, "initializing encoder %pOF for output %u\n",
+		enc_node, output);
 
-	case RCAR_DU_OUTPUT_LVDS1:
-		renc->lvds = rcdu->lvds[1];
-		break;
-
-	default:
-		break;
-	}
-
-	if (enc_node) {
-		dev_dbg(rcdu->dev, "initializing encoder %pOF for output %u\n",
-			enc_node, output);
-
-		/* Locate the DRM bridge from the encoder DT node. */
-		bridge = of_drm_find_bridge(enc_node);
-		if (!bridge) {
-			ret = -EPROBE_DEFER;
-			goto done;
-		}
-	} else {
-		dev_dbg(rcdu->dev,
-			"initializing internal encoder for output %u\n",
-			output);
+	/* Locate the DRM bridge from the encoder DT node. */
+	bridge = of_drm_find_bridge(enc_node);
+	if (!bridge) {
+		ret = -EPROBE_DEFER;
+		goto done;
 	}
 
 	ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
@@ -208,28 +77,14 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu,
 
 	drm_encoder_helper_add(encoder, &encoder_helper_funcs);
 
-	if (bridge) {
-		/*
-		 * Attach the bridge to the encoder. The bridge will create the
-		 * connector.
-		 */
-		ret = drm_bridge_attach(encoder, bridge, NULL);
-		if (ret) {
-			drm_encoder_cleanup(encoder);
-			return ret;
-		}
-	} else {
-		/* There's no bridge, create the connector manually. */
-		switch (output) {
-		case RCAR_DU_OUTPUT_LVDS0:
-		case RCAR_DU_OUTPUT_LVDS1:
-			ret = rcar_du_lvds_connector_init(rcdu, renc, con_node);
-			break;
-
-		default:
-			ret = -EINVAL;
-			break;
-		}
+	/*
+	 * Attach the bridge to the encoder. The bridge will create the
+	 * connector.
+	 */
+	ret = drm_bridge_attach(encoder, bridge, NULL);
+	if (ret) {
+		drm_encoder_cleanup(encoder);
+		return ret;
 	}
 
 done:
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_encoder.h b/drivers/gpu/drm/rcar-du/rcar_du_encoder.h
index 5422fa4df272..2d2abcacd169 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_encoder.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_encoder.h
@@ -19,13 +19,10 @@
 
 struct drm_panel;
 struct rcar_du_device;
-struct rcar_du_lvdsenc;
 
 struct rcar_du_encoder {
 	struct drm_encoder base;
 	enum rcar_du_output output;
-	struct rcar_du_connector *connector;
-	struct rcar_du_lvdsenc *lvds;
 };
 
 #define to_rcar_encoder(e) \
@@ -33,15 +30,6 @@ struct rcar_du_encoder {
 
 #define rcar_encoder_to_drm_encoder(e)	(&(e)->base)
 
-struct rcar_du_connector {
-	struct drm_connector connector;
-	struct rcar_du_encoder *encoder;
-	struct drm_panel *panel;
-};
-
-#define to_rcar_connector(c) \
-	container_of(c, struct rcar_du_connector, connector)
-
 int rcar_du_encoder_init(struct rcar_du_device *rcdu,
 			 enum rcar_du_output output,
 			 struct device_node *enc_node,
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index 566d1a948c8f..0329b354bfa0 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -27,7 +27,6 @@
 #include "rcar_du_drv.h"
 #include "rcar_du_encoder.h"
 #include "rcar_du_kms.h"
-#include "rcar_du_lvdsenc.h"
 #include "rcar_du_regs.h"
 #include "rcar_du_vsp.h"
 
@@ -341,11 +340,10 @@ static int rcar_du_encoders_init_one(struct rcar_du_device *rcdu,
 	of_node_put(entity_ep_node);
 
 	if (!encoder) {
-		/*
-		 * If no encoder has been found the entity must be the
-		 * connector.
-		 */
-		connector = entity;
+		dev_warn(rcdu->dev,
+			 "no encoder found for endpoint %pOF, skipping\n",
+			 ep->local_node);
+		return -ENODEV;
 	}
 
 	ret = rcar_du_encoder_init(rcdu, output, encoder, connector);
@@ -595,10 +593,6 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
 	}
 
 	/* Initialize the encoders. */
-	ret = rcar_du_lvdsenc_init(rcdu);
-	if (ret < 0)
-		return ret;
-
 	ret = rcar_du_encoders_init(rcdu);
 	if (ret < 0)
 		return ret;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c b/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c
deleted file mode 100644
index e96f2df0c305..000000000000
--- a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * rcar_du_lvdscon.c  --  R-Car Display Unit LVDS Connector
- *
- * Copyright (C) 2013-2014 Renesas Electronics Corporation
- *
- * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <drm/drmP.h>
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_crtc.h>
-#include <drm/drm_crtc_helper.h>
-#include <drm/drm_panel.h>
-
-#include <video/display_timing.h>
-#include <video/of_display_timing.h>
-#include <video/videomode.h>
-
-#include "rcar_du_drv.h"
-#include "rcar_du_encoder.h"
-#include "rcar_du_kms.h"
-#include "rcar_du_lvdscon.h"
-
-static int rcar_du_lvds_connector_get_modes(struct drm_connector *connector)
-{
-	struct rcar_du_connector *rcon = to_rcar_connector(connector);
-
-	return drm_panel_get_modes(rcon->panel);
-}
-
-static const struct drm_connector_helper_funcs connector_helper_funcs = {
-	.get_modes = rcar_du_lvds_connector_get_modes,
-};
-
-static void rcar_du_lvds_connector_destroy(struct drm_connector *connector)
-{
-	struct rcar_du_connector *rcon = to_rcar_connector(connector);
-
-	drm_panel_detach(rcon->panel);
-	drm_connector_cleanup(connector);
-}
-
-static const struct drm_connector_funcs connector_funcs = {
-	.reset = drm_atomic_helper_connector_reset,
-	.fill_modes = drm_helper_probe_single_connector_modes,
-	.destroy = rcar_du_lvds_connector_destroy,
-	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
-	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
-};
-
-int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
-				struct rcar_du_encoder *renc,
-				const struct device_node *np)
-{
-	struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
-	struct rcar_du_connector *rcon;
-	struct drm_connector *connector;
-	int ret;
-
-	rcon = devm_kzalloc(rcdu->dev, sizeof(*rcon), GFP_KERNEL);
-	if (rcon == NULL)
-		return -ENOMEM;
-
-	connector = &rcon->connector;
-
-	rcon->panel = of_drm_find_panel(np);
-	if (!rcon->panel)
-		return -EPROBE_DEFER;
-
-	ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
-				 DRM_MODE_CONNECTOR_LVDS);
-	if (ret < 0)
-		return ret;
-
-	drm_connector_helper_add(connector, &connector_helper_funcs);
-
-	ret = drm_mode_connector_attach_encoder(connector, encoder);
-	if (ret < 0)
-		return ret;
-
-	ret = drm_panel_attach(rcon->panel, connector);
-	if (ret < 0)
-		return ret;
-
-	rcon->encoder = renc;
-
-	return 0;
-}
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h b/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h
deleted file mode 100644
index 639071dd235c..000000000000
--- a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * rcar_du_lvdscon.h  --  R-Car Display Unit LVDS Connector
- *
- * Copyright (C) 2013-2014 Renesas Electronics Corporation
- *
- * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef __RCAR_DU_LVDSCON_H__
-#define __RCAR_DU_LVDSCON_H__
-
-struct rcar_du_device;
-struct rcar_du_encoder;
-
-int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
-				struct rcar_du_encoder *renc,
-				const struct device_node *np);
-
-#endif /* __RCAR_DU_LVDSCON_H__ */
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c b/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c
deleted file mode 100644
index 4defa8123eb2..000000000000
--- a/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c
+++ /dev/null
@@ -1,238 +0,0 @@
-/*
- * rcar_du_lvdsenc.c  --  R-Car Display Unit LVDS Encoder
- *
- * Copyright (C) 2013-2014 Renesas Electronics Corporation
- *
- * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-
-#include "rcar_du_drv.h"
-#include "rcar_du_encoder.h"
-#include "rcar_du_lvdsenc.h"
-#include "rcar_lvds_regs.h"
-
-struct rcar_du_lvdsenc {
-	struct rcar_du_device *dev;
-
-	unsigned int index;
-	void __iomem *mmio;
-	struct clk *clock;
-	bool enabled;
-
-	enum rcar_lvds_input input;
-	enum rcar_lvds_mode mode;
-};
-
-static void rcar_lvds_write(struct rcar_du_lvdsenc *lvds, u32 reg, u32 data)
-{
-	iowrite32(data, lvds->mmio + reg);
-}
-
-static u32 rcar_lvds_lvdpllcr_gen2(unsigned int freq)
-{
-	if (freq < 39000)
-		return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_38M;
-	else if (freq < 61000)
-		return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_60M;
-	else if (freq < 121000)
-		return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_121M;
-	else
-		return LVDPLLCR_PLLDLYCNT_150M;
-}
-
-static u32 rcar_lvds_lvdpllcr_gen3(unsigned int freq)
-{
-	if (freq < 42000)
-		return LVDPLLCR_PLLDIVCNT_42M;
-	else if (freq < 85000)
-		return LVDPLLCR_PLLDIVCNT_85M;
-	else if (freq < 128000)
-		return LVDPLLCR_PLLDIVCNT_128M;
-	else
-		return LVDPLLCR_PLLDIVCNT_148M;
-}
-
-static int rcar_du_lvdsenc_start(struct rcar_du_lvdsenc *lvds,
-				 struct rcar_du_crtc *rcrtc)
-{
-	const struct drm_display_mode *mode = &rcrtc->crtc.mode;
-	u32 lvdpllcr;
-	u32 lvdhcr;
-	u32 lvdcr0;
-	int ret;
-
-	if (lvds->enabled)
-		return 0;
-
-	ret = clk_prepare_enable(lvds->clock);
-	if (ret < 0)
-		return ret;
-
-	/*
-	 * Hardcode the channels and control signals routing for now.
-	 *
-	 * HSYNC -> CTRL0
-	 * VSYNC -> CTRL1
-	 * DISP  -> CTRL2
-	 * 0     -> CTRL3
-	 */
-	rcar_lvds_write(lvds, LVDCTRCR, LVDCTRCR_CTR3SEL_ZERO |
-			LVDCTRCR_CTR2SEL_DISP | LVDCTRCR_CTR1SEL_VSYNC |
-			LVDCTRCR_CTR0SEL_HSYNC);
-
-	if (rcar_du_needs(lvds->dev, RCAR_DU_QUIRK_LVDS_LANES))
-		lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 3)
-		       | LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 1);
-	else
-		lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 1)
-		       | LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 3);
-
-	rcar_lvds_write(lvds, LVDCHCR, lvdhcr);
-
-	/* PLL clock configuration. */
-	if (lvds->dev->info->gen < 3)
-		lvdpllcr = rcar_lvds_lvdpllcr_gen2(mode->clock);
-	else
-		lvdpllcr = rcar_lvds_lvdpllcr_gen3(mode->clock);
-	rcar_lvds_write(lvds, LVDPLLCR, lvdpllcr);
-
-	/* Set the LVDS mode and select the input. */
-	lvdcr0 = lvds->mode << LVDCR0_LVMD_SHIFT;
-	if (rcrtc->index == 2)
-		lvdcr0 |= LVDCR0_DUSEL;
-	rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-
-	/* Turn all the channels on. */
-	rcar_lvds_write(lvds, LVDCR1,
-			LVDCR1_CHSTBY(3) | LVDCR1_CHSTBY(2) |
-			LVDCR1_CHSTBY(1) | LVDCR1_CHSTBY(0) | LVDCR1_CLKSTBY);
-
-	if (lvds->dev->info->gen < 3) {
-		/* Enable LVDS operation and turn the bias circuitry on. */
-		lvdcr0 |= LVDCR0_BEN | LVDCR0_LVEN;
-		rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-	}
-
-	/* Turn the PLL on. */
-	lvdcr0 |= LVDCR0_PLLON;
-	rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-
-	if (lvds->dev->info->gen > 2) {
-		/* Set LVDS normal mode. */
-		lvdcr0 |= LVDCR0_PWD;
-		rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-	}
-
-	/* Wait for the startup delay. */
-	usleep_range(100, 150);
-
-	/* Turn the output on. */
-	lvdcr0 |= LVDCR0_LVRES;
-	rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-
-	lvds->enabled = true;
-
-	return 0;
-}
-
-static void rcar_du_lvdsenc_stop(struct rcar_du_lvdsenc *lvds)
-{
-	if (!lvds->enabled)
-		return;
-
-	rcar_lvds_write(lvds, LVDCR0, 0);
-	rcar_lvds_write(lvds, LVDCR1, 0);
-
-	clk_disable_unprepare(lvds->clock);
-
-	lvds->enabled = false;
-}
-
-int rcar_du_lvdsenc_enable(struct rcar_du_lvdsenc *lvds, struct drm_crtc *crtc,
-			   bool enable)
-{
-	if (!enable) {
-		rcar_du_lvdsenc_stop(lvds);
-		return 0;
-	} else if (crtc) {
-		struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
-		return rcar_du_lvdsenc_start(lvds, rcrtc);
-	} else
-		return -EINVAL;
-}
-
-void rcar_du_lvdsenc_atomic_check(struct rcar_du_lvdsenc *lvds,
-				  struct drm_display_mode *mode)
-{
-	/*
-	 * The internal LVDS encoder has a restricted clock frequency operating
-	 * range (31MHz to 148.5MHz). Clamp the clock accordingly.
-	 */
-	mode->clock = clamp(mode->clock, 31000, 148500);
-}
-
-void rcar_du_lvdsenc_set_mode(struct rcar_du_lvdsenc *lvds,
-			      enum rcar_lvds_mode mode)
-{
-	lvds->mode = mode;
-}
-
-static int rcar_du_lvdsenc_get_resources(struct rcar_du_lvdsenc *lvds,
-					 struct platform_device *pdev)
-{
-	struct resource *mem;
-	char name[7];
-
-	sprintf(name, "lvds.%u", lvds->index);
-
-	mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
-	lvds->mmio = devm_ioremap_resource(&pdev->dev, mem);
-	if (IS_ERR(lvds->mmio))
-		return PTR_ERR(lvds->mmio);
-
-	lvds->clock = devm_clk_get(&pdev->dev, name);
-	if (IS_ERR(lvds->clock)) {
-		dev_err(&pdev->dev, "failed to get clock for %s\n", name);
-		return PTR_ERR(lvds->clock);
-	}
-
-	return 0;
-}
-
-int rcar_du_lvdsenc_init(struct rcar_du_device *rcdu)
-{
-	struct platform_device *pdev = to_platform_device(rcdu->dev);
-	struct rcar_du_lvdsenc *lvds;
-	unsigned int i;
-	int ret;
-
-	for (i = 0; i < rcdu->info->num_lvds; ++i) {
-		lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);
-		if (lvds == NULL)
-			return -ENOMEM;
-
-		lvds->dev = rcdu;
-		lvds->index = i;
-		lvds->input = i ? RCAR_LVDS_INPUT_DU1 : RCAR_LVDS_INPUT_DU0;
-		lvds->enabled = false;
-
-		ret = rcar_du_lvdsenc_get_resources(lvds, pdev);
-		if (ret < 0)
-			return ret;
-
-		rcdu->lvds[i] = lvds;
-	}
-
-	return 0;
-}
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.h b/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.h
deleted file mode 100644
index 7218ac89333e..000000000000
--- a/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.h
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * rcar_du_lvdsenc.h  --  R-Car Display Unit LVDS Encoder
- *
- * Copyright (C) 2013-2014 Renesas Electronics Corporation
- *
- * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef __RCAR_DU_LVDSENC_H__
-#define __RCAR_DU_LVDSENC_H__
-
-#include <linux/io.h>
-#include <linux/module.h>
-
-struct rcar_drm_crtc;
-struct rcar_du_lvdsenc;
-
-enum rcar_lvds_input {
-	RCAR_LVDS_INPUT_DU0,
-	RCAR_LVDS_INPUT_DU1,
-	RCAR_LVDS_INPUT_DU2,
-};
-
-/* Keep in sync with the LVDCR0.LVMD hardware register values. */
-enum rcar_lvds_mode {
-	RCAR_LVDS_MODE_JEIDA = 0,
-	RCAR_LVDS_MODE_MIRROR = 1,
-	RCAR_LVDS_MODE_VESA = 4,
-};
-
-#if IS_ENABLED(CONFIG_DRM_RCAR_LVDS)
-int rcar_du_lvdsenc_init(struct rcar_du_device *rcdu);
-void rcar_du_lvdsenc_set_mode(struct rcar_du_lvdsenc *lvds,
-			      enum rcar_lvds_mode mode);
-int rcar_du_lvdsenc_enable(struct rcar_du_lvdsenc *lvds,
-			   struct drm_crtc *crtc, bool enable);
-void rcar_du_lvdsenc_atomic_check(struct rcar_du_lvdsenc *lvds,
-				  struct drm_display_mode *mode);
-#else
-static inline int rcar_du_lvdsenc_init(struct rcar_du_device *rcdu)
-{
-	return 0;
-}
-static inline void rcar_du_lvdsenc_set_mode(struct rcar_du_lvdsenc *lvds,
-					    enum rcar_lvds_mode mode)
-{
-}
-static inline int rcar_du_lvdsenc_enable(struct rcar_du_lvdsenc *lvds,
-					 struct drm_crtc *crtc, bool enable)
-{
-	return 0;
-}
-static inline void rcar_du_lvdsenc_atomic_check(struct rcar_du_lvdsenc *lvds,
-						struct drm_display_mode *mode)
-{
-}
-#endif
-
-#endif /* __RCAR_DU_LVDSENC_H__ */
diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c
new file mode 100644
index 000000000000..0a5aa39b1967
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c
@@ -0,0 +1,524 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rcar_lvds.c  --  R-Car LVDS Encoder
+ *
+ * Copyright (C) 2013-2014 Renesas Electronics Corporation
+ *
+ * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_panel.h>
+
+#include "rcar_lvds_regs.h"
+
+/* Keep in sync with the LVDCR0.LVMD hardware register values. */
+enum rcar_lvds_mode {
+	RCAR_LVDS_MODE_JEIDA = 0,
+	RCAR_LVDS_MODE_MIRROR = 1,
+	RCAR_LVDS_MODE_VESA = 4,
+};
+
+#define RCAR_LVDS_QUIRK_LANES	(1 << 0)	/* LVDS lanes 1 and 3 inverted */
+
+struct rcar_lvds_device_info {
+	unsigned int gen;
+	unsigned int quirks;
+};
+
+struct rcar_lvds {
+	struct device *dev;
+	const struct rcar_lvds_device_info *info;
+
+	struct drm_bridge bridge;
+
+	struct drm_bridge *next_bridge;
+	struct drm_connector connector;
+	struct drm_panel *panel;
+
+	void __iomem *mmio;
+	struct clk *clock;
+	bool enabled;
+
+	struct drm_display_mode display_mode;
+	enum rcar_lvds_mode mode;
+};
+
+#define bridge_to_rcar_lvds(bridge) \
+	container_of(bridge, struct rcar_lvds, bridge)
+
+#define connector_to_rcar_lvds(connector) \
+	container_of(connector, struct rcar_lvds, connector)
+
+static void rcar_lvds_write(struct rcar_lvds *lvds, u32 reg, u32 data)
+{
+	iowrite32(data, lvds->mmio + reg);
+}
+
+/* -----------------------------------------------------------------------------
+ * Connector & Panel
+ */
+
+static int rcar_lvds_connector_get_modes(struct drm_connector *connector)
+{
+	struct rcar_lvds *lvds = connector_to_rcar_lvds(connector);
+
+	return drm_panel_get_modes(lvds->panel);
+}
+
+static int rcar_lvds_connector_atomic_check(struct drm_connector *connector,
+					    struct drm_connector_state *state)
+{
+	struct rcar_lvds *lvds = connector_to_rcar_lvds(connector);
+	const struct drm_display_mode *panel_mode;
+	struct drm_crtc_state *crtc_state;
+
+	if (list_empty(&connector->modes)) {
+		dev_dbg(lvds->dev, "connector: empty modes list\n");
+		return -EINVAL;
+	}
+
+	panel_mode = list_first_entry(&connector->modes,
+				      struct drm_display_mode, head);
+
+	/* We're not allowed to modify the resolution. */
+	crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
+	if (IS_ERR(crtc_state))
+		return PTR_ERR(crtc_state);
+
+	if (crtc_state->mode.hdisplay != panel_mode->hdisplay ||
+	    crtc_state->mode.vdisplay != panel_mode->vdisplay)
+		return -EINVAL;
+
+	/* The flat panel mode is fixed, just copy it to the adjusted mode. */
+	drm_mode_copy(&crtc_state->adjusted_mode, panel_mode);
+
+	return 0;
+}
+
+static const struct drm_connector_helper_funcs rcar_lvds_conn_helper_funcs = {
+	.get_modes = rcar_lvds_connector_get_modes,
+	.atomic_check = rcar_lvds_connector_atomic_check,
+};
+
+static const struct drm_connector_funcs rcar_lvds_conn_funcs = {
+	.reset = drm_atomic_helper_connector_reset,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = drm_connector_cleanup,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+/* -----------------------------------------------------------------------------
+ * Bridge
+ */
+
+static u32 rcar_lvds_lvdpllcr_gen2(unsigned int freq)
+{
+	if (freq < 39000)
+		return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_38M;
+	else if (freq < 61000)
+		return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_60M;
+	else if (freq < 121000)
+		return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_121M;
+	else
+		return LVDPLLCR_PLLDLYCNT_150M;
+}
+
+static u32 rcar_lvds_lvdpllcr_gen3(unsigned int freq)
+{
+	if (freq < 42000)
+		return LVDPLLCR_PLLDIVCNT_42M;
+	else if (freq < 85000)
+		return LVDPLLCR_PLLDIVCNT_85M;
+	else if (freq < 128000)
+		return LVDPLLCR_PLLDIVCNT_128M;
+	else
+		return LVDPLLCR_PLLDIVCNT_148M;
+}
+
+static void rcar_lvds_enable(struct drm_bridge *bridge)
+{
+	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
+	const struct drm_display_mode *mode = &lvds->display_mode;
+	/*
+	 * FIXME: We should really retrieve the CRTC through the state, but how
+	 * do we get a state pointer?
+	 */
+	struct drm_crtc *crtc = lvds->bridge.encoder->crtc;
+	u32 lvdpllcr;
+	u32 lvdhcr;
+	u32 lvdcr0;
+	int ret;
+
+	WARN_ON(lvds->enabled);
+
+	ret = clk_prepare_enable(lvds->clock);
+	if (ret < 0)
+		return;
+
+	/*
+	 * Hardcode the channels and control signals routing for now.
+	 *
+	 * HSYNC -> CTRL0
+	 * VSYNC -> CTRL1
+	 * DISP  -> CTRL2
+	 * 0     -> CTRL3
+	 */
+	rcar_lvds_write(lvds, LVDCTRCR, LVDCTRCR_CTR3SEL_ZERO |
+			LVDCTRCR_CTR2SEL_DISP | LVDCTRCR_CTR1SEL_VSYNC |
+			LVDCTRCR_CTR0SEL_HSYNC);
+
+	if (lvds->info->quirks & RCAR_LVDS_QUIRK_LANES)
+		lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 3)
+		       | LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 1);
+	else
+		lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 1)
+		       | LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 3);
+
+	rcar_lvds_write(lvds, LVDCHCR, lvdhcr);
+
+	/* PLL clock configuration. */
+	if (lvds->info->gen < 3)
+		lvdpllcr = rcar_lvds_lvdpllcr_gen2(mode->clock);
+	else
+		lvdpllcr = rcar_lvds_lvdpllcr_gen3(mode->clock);
+	rcar_lvds_write(lvds, LVDPLLCR, lvdpllcr);
+
+	/* Set the LVDS mode and select the input. */
+	lvdcr0 = lvds->mode << LVDCR0_LVMD_SHIFT;
+	if (drm_crtc_index(crtc) == 2)
+		lvdcr0 |= LVDCR0_DUSEL;
+	rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+
+	/* Turn all the channels on. */
+	rcar_lvds_write(lvds, LVDCR1,
+			LVDCR1_CHSTBY(3) | LVDCR1_CHSTBY(2) |
+			LVDCR1_CHSTBY(1) | LVDCR1_CHSTBY(0) | LVDCR1_CLKSTBY);
+
+	if (lvds->info->gen < 3) {
+		/* Enable LVDS operation and turn the bias circuitry on. */
+		lvdcr0 |= LVDCR0_BEN | LVDCR0_LVEN;
+		rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+	}
+
+	/* Turn the PLL on. */
+	lvdcr0 |= LVDCR0_PLLON;
+	rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+
+	if (lvds->info->gen > 2) {
+		/* Set LVDS normal mode. */
+		lvdcr0 |= LVDCR0_PWD;
+		rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+	}
+
+	/* Wait for the startup delay. */
+	usleep_range(100, 150);
+
+	/* Turn the output on. */
+	lvdcr0 |= LVDCR0_LVRES;
+	rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+
+	if (lvds->panel) {
+		drm_panel_prepare(lvds->panel);
+		drm_panel_enable(lvds->panel);
+	}
+
+	lvds->enabled = true;
+}
+
+static void rcar_lvds_disable(struct drm_bridge *bridge)
+{
+	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
+
+	WARN_ON(!lvds->enabled);
+
+	if (lvds->panel) {
+		drm_panel_disable(lvds->panel);
+		drm_panel_unprepare(lvds->panel);
+	}
+
+	rcar_lvds_write(lvds, LVDCR0, 0);
+	rcar_lvds_write(lvds, LVDCR1, 0);
+
+	clk_disable_unprepare(lvds->clock);
+
+	lvds->enabled = false;
+}
+
+static bool rcar_lvds_mode_fixup(struct drm_bridge *bridge,
+				 const struct drm_display_mode *mode,
+				 struct drm_display_mode *adjusted_mode)
+{
+	/*
+	 * The internal LVDS encoder has a restricted clock frequency operating
+	 * range (31MHz to 148.5MHz). Clamp the clock accordingly.
+	 */
+	adjusted_mode->clock = clamp(adjusted_mode->clock, 31000, 148500);
+
+	return true;
+}
+
+static void rcar_lvds_get_lvds_mode(struct rcar_lvds *lvds)
+{
+	struct drm_display_info *info = &lvds->connector.display_info;
+	enum rcar_lvds_mode mode;
+
+	/*
+	 * There is no API yet to retrieve LVDS mode from a bridge, only panels
+	 * are supported.
+	 */
+	if (!lvds->panel)
+		return;
+
+	if (!info->num_bus_formats || !info->bus_formats) {
+		dev_err(lvds->dev, "no LVDS bus format reported\n");
+		return;
+	}
+
+	switch (info->bus_formats[0]) {
+	case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
+	case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
+		mode = RCAR_LVDS_MODE_JEIDA;
+		break;
+	case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
+		mode = RCAR_LVDS_MODE_VESA;
+		break;
+	default:
+		dev_err(lvds->dev, "unsupported LVDS bus format 0x%04x\n",
+			info->bus_formats[0]);
+		return;
+	}
+
+	if (info->bus_flags & DRM_BUS_FLAG_DATA_LSB_TO_MSB)
+		mode |= RCAR_LVDS_MODE_MIRROR;
+
+	lvds->mode = mode;
+}
+
+static void rcar_lvds_mode_set(struct drm_bridge *bridge,
+			       struct drm_display_mode *mode,
+			       struct drm_display_mode *adjusted_mode)
+{
+	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
+
+	WARN_ON(lvds->enabled);
+
+	lvds->display_mode = *adjusted_mode;
+
+	rcar_lvds_get_lvds_mode(lvds);
+}
+
+static int rcar_lvds_attach(struct drm_bridge *bridge)
+{
+	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
+	struct drm_connector *connector = &lvds->connector;
+	struct drm_encoder *encoder = bridge->encoder;
+	int ret;
+
+	/* If we have a next bridge just attach it. */
+	if (lvds->next_bridge)
+		return drm_bridge_attach(bridge->encoder, lvds->next_bridge,
+					 bridge);
+
+	/* Otherwise we have a panel, create a connector. */
+	ret = drm_connector_init(bridge->dev, connector, &rcar_lvds_conn_funcs,
+				 DRM_MODE_CONNECTOR_LVDS);
+	if (ret < 0)
+		return ret;
+
+	drm_connector_helper_add(connector, &rcar_lvds_conn_helper_funcs);
+
+	ret = drm_mode_connector_attach_encoder(connector, encoder);
+	if (ret < 0)
+		return ret;
+
+	return drm_panel_attach(lvds->panel, connector);
+}
+
+static void rcar_lvds_detach(struct drm_bridge *bridge)
+{
+	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
+
+	if (lvds->panel)
+		drm_panel_detach(lvds->panel);
+}
+
+static const struct drm_bridge_funcs rcar_lvds_bridge_ops = {
+	.attach = rcar_lvds_attach,
+	.detach = rcar_lvds_detach,
+	.enable = rcar_lvds_enable,
+	.disable = rcar_lvds_disable,
+	.mode_fixup = rcar_lvds_mode_fixup,
+	.mode_set = rcar_lvds_mode_set,
+};
+
+/* -----------------------------------------------------------------------------
+ * Probe & Remove
+ */
+
+static int rcar_lvds_parse_dt(struct rcar_lvds *lvds)
+{
+	struct device_node *local_output = NULL;
+	struct device_node *remote_input = NULL;
+	struct device_node *remote = NULL;
+	struct device_node *node;
+	bool is_bridge = false;
+	int ret = 0;
+
+	local_output = of_graph_get_endpoint_by_regs(lvds->dev->of_node, 1, 0);
+	if (!local_output) {
+		dev_dbg(lvds->dev, "unconnected port@1\n");
+		return -ENODEV;
+	}
+
+	/*
+	 * Locate the connected entity and infer its type from the number of
+	 * endpoints.
+	 */
+	remote = of_graph_get_remote_port_parent(local_output);
+	if (!remote) {
+		dev_dbg(lvds->dev, "unconnected endpoint %pOF\n", local_output);
+		ret = -ENODEV;
+		goto done;
+	}
+
+	if (!of_device_is_available(remote)) {
+		dev_dbg(lvds->dev, "connected entity %pOF is disabled\n",
+			remote);
+		ret = -ENODEV;
+		goto done;
+	}
+
+	remote_input = of_graph_get_remote_endpoint(local_output);
+
+	for_each_endpoint_of_node(remote, node) {
+		if (node != remote_input) {
+			/*
+			 * We've found one endpoint other than the input, this
+			 * must be a bridge.
+			 */
+			is_bridge = true;
+			of_node_put(node);
+			break;
+		}
+	}
+
+	if (is_bridge) {
+		lvds->next_bridge = of_drm_find_bridge(remote);
+		if (!lvds->next_bridge)
+			ret = -EPROBE_DEFER;
+	} else {
+		lvds->panel = of_drm_find_panel(remote);
+		if (!lvds->panel)
+			ret = -EPROBE_DEFER;
+	}
+
+done:
+	of_node_put(local_output);
+	of_node_put(remote_input);
+	of_node_put(remote);
+
+	return ret;
+}
+
+static int rcar_lvds_probe(struct platform_device *pdev)
+{
+	struct rcar_lvds *lvds;
+	struct resource *mem;
+	int ret;
+
+	lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);
+	if (lvds == NULL)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, lvds);
+
+	lvds->dev = &pdev->dev;
+	lvds->info = of_device_get_match_data(&pdev->dev);
+	lvds->enabled = false;
+
+	ret = rcar_lvds_parse_dt(lvds);
+	if (ret < 0)
+		return ret;
+
+	lvds->bridge.driver_private = lvds;
+	lvds->bridge.funcs = &rcar_lvds_bridge_ops;
+	lvds->bridge.of_node = pdev->dev.of_node;
+
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	lvds->mmio = devm_ioremap_resource(&pdev->dev, mem);
+	if (IS_ERR(lvds->mmio))
+		return PTR_ERR(lvds->mmio);
+
+	lvds->clock = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(lvds->clock)) {
+		dev_err(&pdev->dev, "failed to get clock\n");
+		return PTR_ERR(lvds->clock);
+	}
+
+	drm_bridge_add(&lvds->bridge);
+
+	return 0;
+}
+
+static int rcar_lvds_remove(struct platform_device *pdev)
+{
+	struct rcar_lvds *lvds = platform_get_drvdata(pdev);
+
+	drm_bridge_remove(&lvds->bridge);
+
+	return 0;
+}
+
+static const struct rcar_lvds_device_info rcar_lvds_gen2_info = {
+	.gen = 2,
+};
+
+static const struct rcar_lvds_device_info rcar_lvds_r8a7790_info = {
+	.gen = 2,
+	.quirks = RCAR_LVDS_QUIRK_LANES,
+};
+
+static const struct rcar_lvds_device_info rcar_lvds_gen3_info = {
+	.gen = 3,
+};
+
+static const struct of_device_id rcar_lvds_of_table[] = {
+	{ .compatible = "renesas,r8a7743-lvds", .data = &rcar_lvds_gen2_info },
+	{ .compatible = "renesas,r8a7790-lvds", .data = &rcar_lvds_r8a7790_info },
+	{ .compatible = "renesas,r8a7791-lvds", .data = &rcar_lvds_gen2_info },
+	{ .compatible = "renesas,r8a7793-lvds", .data = &rcar_lvds_gen2_info },
+	{ .compatible = "renesas,r8a7795-lvds", .data = &rcar_lvds_gen3_info },
+	{ .compatible = "renesas,r8a7796-lvds", .data = &rcar_lvds_gen3_info },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(of, rcar_lvds_of_table);
+
+static struct platform_driver rcar_lvds_platform_driver = {
+	.probe		= rcar_lvds_probe,
+	.remove		= rcar_lvds_remove,
+	.driver		= {
+		.name	= "rcar-lvds",
+		.of_match_table = rcar_lvds_of_table,
+	},
+};
+
+module_platform_driver(rcar_lvds_platform_driver);
+
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
+MODULE_DESCRIPTION("Renesas R-Car LVDS Encoder Driver");
+MODULE_LICENSE("GPL");
-- 
Regards,

Laurent Pinchart

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v4 10/16] ARM: dts: r8a7790: Convert to new LVDS DT bindings

[Laurent Pinchart]

The internal LVDS encoder now has DT bindings separate from the DU. Port
the device tree over to the new model.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v3:

- Added power-domains and resets properties to LVDS nodes

Changes since v2:

- Fixed LVDS compatible string

Changes since v1:

- Remove the DU reg-names property
---
 arch/arm/boot/dts/r8a7790-lager.dts | 22 ++++++++++---
 arch/arm/boot/dts/r8a7790.dtsi      | 64 +++++++++++++++++++++++++++++++++----
 2 files changed, 74 insertions(+), 12 deletions(-)

diff --git a/arch/arm/boot/dts/r8a7790-lager.dts b/arch/arm/boot/dts/r8a7790-lager.dts
index 169da676c4ba..b51ee84309bf 100644
--- a/arch/arm/boot/dts/r8a7790-lager.dts
+++ b/arch/arm/boot/dts/r8a7790-lager.dts
@@ -316,10 +316,8 @@
 	status = "okay";
 
 	clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>, <&cpg CPG_MOD 722>,
-		 <&cpg CPG_MOD 726>, <&cpg CPG_MOD 725>,
 		 <&x13_clk>, <&x2_clk>;
-	clock-names = "du.0", "du.1", "du.2", "lvds.0", "lvds.1",
-		      "dclkin.0", "dclkin.1";
+	clock-names = "du.0", "du.1", "du.2", "dclkin.0", "dclkin.1";
 
 	ports {
 		port@0 {
@@ -327,12 +325,26 @@
 				remote-endpoint = <&adv7123_in>;
 			};
 		};
+	};
+};
+
+&lvds0 {
+	status = "okay";
+
+	ports {
 		port@1 {
 			endpoint {
 				remote-endpoint = <&adv7511_in>;
 			};
 		};
-		port@2 {
+	};
+};
+
+&lvds1 {
+	status = "okay";
+
+	ports {
+		port@1 {
 			lvds_connector: endpoint {
 			};
 		};
@@ -688,7 +700,7 @@
 			port@0 {
 				reg = <0>;
 				adv7511_in: endpoint {
-					remote-endpoint = <&du_out_lvds0>;
+					remote-endpoint = <&lvds0_out>;
 				};
 			};
 
diff --git a/arch/arm/boot/dts/r8a7790.dtsi b/arch/arm/boot/dts/r8a7790.dtsi
index ed9a68538a55..e688dd831e4e 100644
--- a/arch/arm/boot/dts/r8a7790.dtsi
+++ b/arch/arm/boot/dts/r8a7790.dtsi
@@ -1068,17 +1068,13 @@
 
 	du: display@feb00000 {
 		compatible = "renesas,du-r8a7790";
-		reg = <0 0xfeb00000 0 0x70000>,
-		      <0 0xfeb90000 0 0x1c>,
-		      <0 0xfeb94000 0 0x1c>;
-		reg-names = "du", "lvds.0", "lvds.1";
+		reg = <0 0xfeb00000 0 0x70000>;
 		interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 269 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>,
-			 <&cpg CPG_MOD 722>, <&cpg CPG_MOD 726>,
-			 <&cpg CPG_MOD 725>;
-		clock-names = "du.0", "du.1", "du.2", "lvds.0", "lvds.1";
+			 <&cpg CPG_MOD 722>;
+		clock-names = "du.0", "du.1", "du.2";
 		status = "disabled";
 
 		ports {
@@ -1093,11 +1089,65 @@
 			port@1 {
 				reg = <1>;
 				du_out_lvds0: endpoint {
+					remote-endpoint = <&lvds0_in>;
 				};
 			};
 			port@2 {
 				reg = <2>;
 				du_out_lvds1: endpoint {
+					remote-endpoint = <&lvds1_in>;
+				};
+			};
+		};
+	};
+
+	lvds0: lvds@feb90000 {
+		compatible = "renesas,r8a7790-lvds";
+		reg = <0 0xfeb90000 0 0x1c>;
+		clocks = <&cpg CPG_MOD 726>;
+		power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
+		resets = <&cpg 726>;
+		status = "disabled";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				lvds0_in: endpoint {
+					remote-endpoint = <&du_out_lvds0>;
+				};
+			};
+			port@1 {
+				reg = <1>;
+				lvds0_out: endpoint {
+				};
+			};
+		};
+	};
+
+	lvds1: lvds@feb94000 {
+		compatible = "renesas,r8a7790-lvds";
+		reg = <0 0xfeb94000 0 0x1c>;
+		clocks = <&cpg CPG_MOD 725>;
+		power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
+		resets = <&cpg 725>;
+		status = "disabled";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				lvds1_in: endpoint {
+					remote-endpoint = <&du_out_lvds1>;
+				};
+			};
+			port@1 {
+				reg = <1>;
+				lvds1_out: endpoint {
 				};
 			};
 		};
-- 
Regards,

Laurent Pinchart

[PATCH v4 10/16] ARM: dts: r8a7790: Convert to new LVDS DT bindings

[Laurent Pinchart]

The internal LVDS encoder now has DT bindings separate from the DU. Port
the device tree over to the new model.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v3:

- Added power-domains and resets properties to LVDS nodes

Changes since v2:

- Fixed LVDS compatible string

Changes since v1:

- Remove the DU reg-names property
---
 arch/arm/boot/dts/r8a7790-lager.dts | 22 ++++++++++---
 arch/arm/boot/dts/r8a7790.dtsi      | 64 +++++++++++++++++++++++++++++++++----
 2 files changed, 74 insertions(+), 12 deletions(-)

diff --git a/arch/arm/boot/dts/r8a7790-lager.dts b/arch/arm/boot/dts/r8a7790-lager.dts
index 169da676c4ba..b51ee84309bf 100644
--- a/arch/arm/boot/dts/r8a7790-lager.dts
+++ b/arch/arm/boot/dts/r8a7790-lager.dts
@@ -316,10 +316,8 @@
 	status = "okay";
 
 	clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>, <&cpg CPG_MOD 722>,
-		 <&cpg CPG_MOD 726>, <&cpg CPG_MOD 725>,
 		 <&x13_clk>, <&x2_clk>;
-	clock-names = "du.0", "du.1", "du.2", "lvds.0", "lvds.1",
-		      "dclkin.0", "dclkin.1";
+	clock-names = "du.0", "du.1", "du.2", "dclkin.0", "dclkin.1";
 
 	ports {
 		port@0 {
@@ -327,12 +325,26 @@
 				remote-endpoint = <&adv7123_in>;
 			};
 		};
+	};
+};
+
+&lvds0 {
+	status = "okay";
+
+	ports {
 		port@1 {
 			endpoint {
 				remote-endpoint = <&adv7511_in>;
 			};
 		};
-		port@2 {
+	};
+};
+
+&lvds1 {
+	status = "okay";
+
+	ports {
+		port@1 {
 			lvds_connector: endpoint {
 			};
 		};
@@ -688,7 +700,7 @@
 			port@0 {
 				reg = <0>;
 				adv7511_in: endpoint {
-					remote-endpoint = <&du_out_lvds0>;
+					remote-endpoint = <&lvds0_out>;
 				};
 			};
 
diff --git a/arch/arm/boot/dts/r8a7790.dtsi b/arch/arm/boot/dts/r8a7790.dtsi
index ed9a68538a55..e688dd831e4e 100644
--- a/arch/arm/boot/dts/r8a7790.dtsi
+++ b/arch/arm/boot/dts/r8a7790.dtsi
@@ -1068,17 +1068,13 @@
 
 	du: display@feb00000 {
 		compatible = "renesas,du-r8a7790";
-		reg = <0 0xfeb00000 0 0x70000>,
-		      <0 0xfeb90000 0 0x1c>,
-		      <0 0xfeb94000 0 0x1c>;
-		reg-names = "du", "lvds.0", "lvds.1";
+		reg = <0 0xfeb00000 0 0x70000>;
 		interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 269 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>,
-			 <&cpg CPG_MOD 722>, <&cpg CPG_MOD 726>,
-			 <&cpg CPG_MOD 725>;
-		clock-names = "du.0", "du.1", "du.2", "lvds.0", "lvds.1";
+			 <&cpg CPG_MOD 722>;
+		clock-names = "du.0", "du.1", "du.2";
 		status = "disabled";
 
 		ports {
@@ -1093,11 +1089,65 @@
 			port@1 {
 				reg = <1>;
 				du_out_lvds0: endpoint {
+					remote-endpoint = <&lvds0_in>;
 				};
 			};
 			port@2 {
 				reg = <2>;
 				du_out_lvds1: endpoint {
+					remote-endpoint = <&lvds1_in>;
+				};
+			};
+		};
+	};
+
+	lvds0: lvds@feb90000 {
+		compatible = "renesas,r8a7790-lvds";
+		reg = <0 0xfeb90000 0 0x1c>;
+		clocks = <&cpg CPG_MOD 726>;
+		power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
+		resets = <&cpg 726>;
+		status = "disabled";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				lvds0_in: endpoint {
+					remote-endpoint = <&du_out_lvds0>;
+				};
+			};
+			port@1 {
+				reg = <1>;
+				lvds0_out: endpoint {
+				};
+			};
+		};
+	};
+
+	lvds1: lvds@feb94000 {
+		compatible = "renesas,r8a7790-lvds";
+		reg = <0 0xfeb94000 0 0x1c>;
+		clocks = <&cpg CPG_MOD 725>;
+		power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
+		resets = <&cpg 725>;
+		status = "disabled";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				lvds1_in: endpoint {
+					remote-endpoint = <&du_out_lvds1>;
+				};
+			};
+			port@1 {
+				reg = <1>;
+				lvds1_out: endpoint {
 				};
 			};
 		};
-- 
Regards,

Laurent Pinchart

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v4 11/16] ARM: dts: r8a7791: Convert to new LVDS DT bindings

[Laurent Pinchart]

The internal LVDS encoder now has DT bindings separate from the DU. Port
the device tree over to the new model.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v3:

- Added power-domains and resets properties to LVDS nodes

Changes since v2:

- Fixed LVDS compatible string

Changes since v1:

- Remove the DU reg-names property
---
 arch/arm/boot/dts/r8a7791-koelsch.dts | 10 ++++++++--
 arch/arm/boot/dts/r8a7791-porter.dts  | 16 +++++++++++++---
 arch/arm/boot/dts/r8a7791.dtsi        | 36 +++++++++++++++++++++++++++++------
 3 files changed, 51 insertions(+), 11 deletions(-)

diff --git a/arch/arm/boot/dts/r8a7791-koelsch.dts b/arch/arm/boot/dts/r8a7791-koelsch.dts
index a50924d12b6f..c42ff25e3aa3 100644
--- a/arch/arm/boot/dts/r8a7791-koelsch.dts
+++ b/arch/arm/boot/dts/r8a7791-koelsch.dts
@@ -337,8 +337,7 @@
 
 	clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>, <&cpg CPG_MOD 726>,
 		 <&x13_clk>, <&x2_clk>;
-	clock-names = "du.0", "du.1", "lvds.0",
-		      "dclkin.0", "dclkin.1";
+	clock-names = "du.0", "du.1", "dclkin.0", "dclkin.1";
 
 	ports {
 		port@0 {
@@ -346,6 +345,13 @@
 				remote-endpoint = <&adv7511_in>;
 			};
 		};
+	};
+};
+
+&lvds0 {
+	status = "okay";
+
+	ports {
 		port@1 {
 			lvds_connector: endpoint {
 			};
diff --git a/arch/arm/boot/dts/r8a7791-porter.dts b/arch/arm/boot/dts/r8a7791-porter.dts
index 9a02d03b23c2..e6d02839d636 100644
--- a/arch/arm/boot/dts/r8a7791-porter.dts
+++ b/arch/arm/boot/dts/r8a7791-porter.dts
@@ -419,10 +419,9 @@
 	pinctrl-names = "default";
 	status = "okay";
 
-	clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>, <&cpg CPG_MOD 726>,
+	clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>,
 		 <&x3_clk>, <&x16_clk>;
-	clock-names = "du.0", "du.1", "lvds.0",
-		      "dclkin.0", "dclkin.1";
+	clock-names = "du.0", "du.1", "dclkin.0", "dclkin.1";
 
 	ports {
 		port@0 {
@@ -433,6 +432,17 @@
 	};
 };
 
+&lvds0 {
+	status = "okay";
+
+	ports {
+		port@1 {
+			lvds_connector: endpoint {
+			};
+		};
+	};
+};
+
 &rcar_sound {
 	pinctrl-0 = <&ssi_pins &audio_clk_pins>;
 	pinctrl-names = "default";
diff --git a/arch/arm/boot/dts/r8a7791.dtsi b/arch/arm/boot/dts/r8a7791.dtsi
index 008a260f86a5..8660f8a329c7 100644
--- a/arch/arm/boot/dts/r8a7791.dtsi
+++ b/arch/arm/boot/dts/r8a7791.dtsi
@@ -1103,15 +1103,12 @@
 
 	du: display@feb00000 {
 		compatible = "renesas,du-r8a7791";
-		reg = <0 0xfeb00000 0 0x40000>,
-		      <0 0xfeb90000 0 0x1c>;
-		reg-names = "du", "lvds.0";
+		reg = <0 0xfeb00000 0 0x40000>;
 		interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&cpg CPG_MOD 724>,
-			 <&cpg CPG_MOD 723>,
-			 <&cpg CPG_MOD 726>;
-		clock-names = "du.0", "du.1", "lvds.0";
+			 <&cpg CPG_MOD 723>;
+		clock-names = "du.0", "du.1";
 		status = "disabled";
 
 		ports {
@@ -1126,6 +1123,33 @@
 			port@1 {
 				reg = <1>;
 				du_out_lvds0: endpoint {
+					remote-endpoint = <&lvds0_in>;
+				};
+			};
+		};
+	};
+
+	lvds0: lvds@feb90000 {
+		compatible = "renesas,r8a7791-lvds";
+		reg = <0 0xfeb90000 0 0x1c>;
+		clocks = <&cpg CPG_MOD 726>;
+		power-domains = <&sysc R8A7791_PD_ALWAYS_ON>;
+		resets = <&cpg 726>;
+		status = "disabled";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				lvds0_in: endpoint {
+					remote-endpoint = <&du_out_lvds0>;
+				};
+			};
+			port@1 {
+				reg = <1>;
+				lvds0_out: endpoint {
 				};
 			};
 		};
-- 
Regards,

Laurent Pinchart

[PATCH v4 11/16] ARM: dts: r8a7791: Convert to new LVDS DT bindings

[Laurent Pinchart]

The internal LVDS encoder now has DT bindings separate from the DU. Port
the device tree over to the new model.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v3:

- Added power-domains and resets properties to LVDS nodes

Changes since v2:

- Fixed LVDS compatible string

Changes since v1:

- Remove the DU reg-names property
---
 arch/arm/boot/dts/r8a7791-koelsch.dts | 10 ++++++++--
 arch/arm/boot/dts/r8a7791-porter.dts  | 16 +++++++++++++---
 arch/arm/boot/dts/r8a7791.dtsi        | 36 +++++++++++++++++++++++++++++------
 3 files changed, 51 insertions(+), 11 deletions(-)

diff --git a/arch/arm/boot/dts/r8a7791-koelsch.dts b/arch/arm/boot/dts/r8a7791-koelsch.dts
index a50924d12b6f..c42ff25e3aa3 100644
--- a/arch/arm/boot/dts/r8a7791-koelsch.dts
+++ b/arch/arm/boot/dts/r8a7791-koelsch.dts
@@ -337,8 +337,7 @@
 
 	clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>, <&cpg CPG_MOD 726>,
 		 <&x13_clk>, <&x2_clk>;
-	clock-names = "du.0", "du.1", "lvds.0",
-		      "dclkin.0", "dclkin.1";
+	clock-names = "du.0", "du.1", "dclkin.0", "dclkin.1";
 
 	ports {
 		port@0 {
@@ -346,6 +345,13 @@
 				remote-endpoint = <&adv7511_in>;
 			};
 		};
+	};
+};
+
+&lvds0 {
+	status = "okay";
+
+	ports {
 		port@1 {
 			lvds_connector: endpoint {
 			};
diff --git a/arch/arm/boot/dts/r8a7791-porter.dts b/arch/arm/boot/dts/r8a7791-porter.dts
index 9a02d03b23c2..e6d02839d636 100644
--- a/arch/arm/boot/dts/r8a7791-porter.dts
+++ b/arch/arm/boot/dts/r8a7791-porter.dts
@@ -419,10 +419,9 @@
 	pinctrl-names = "default";
 	status = "okay";
 
-	clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>, <&cpg CPG_MOD 726>,
+	clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>,
 		 <&x3_clk>, <&x16_clk>;
-	clock-names = "du.0", "du.1", "lvds.0",
-		      "dclkin.0", "dclkin.1";
+	clock-names = "du.0", "du.1", "dclkin.0", "dclkin.1";
 
 	ports {
 		port@0 {
@@ -433,6 +432,17 @@
 	};
 };
 
+&lvds0 {
+	status = "okay";
+
+	ports {
+		port@1 {
+			lvds_connector: endpoint {
+			};
+		};
+	};
+};
+
 &rcar_sound {
 	pinctrl-0 = <&ssi_pins &audio_clk_pins>;
 	pinctrl-names = "default";
diff --git a/arch/arm/boot/dts/r8a7791.dtsi b/arch/arm/boot/dts/r8a7791.dtsi
index 008a260f86a5..8660f8a329c7 100644
--- a/arch/arm/boot/dts/r8a7791.dtsi
+++ b/arch/arm/boot/dts/r8a7791.dtsi
@@ -1103,15 +1103,12 @@
 
 	du: display@feb00000 {
 		compatible = "renesas,du-r8a7791";
-		reg = <0 0xfeb00000 0 0x40000>,
-		      <0 0xfeb90000 0 0x1c>;
-		reg-names = "du", "lvds.0";
+		reg = <0 0xfeb00000 0 0x40000>;
 		interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&cpg CPG_MOD 724>,
-			 <&cpg CPG_MOD 723>,
-			 <&cpg CPG_MOD 726>;
-		clock-names = "du.0", "du.1", "lvds.0";
+			 <&cpg CPG_MOD 723>;
+		clock-names = "du.0", "du.1";
 		status = "disabled";
 
 		ports {
@@ -1126,6 +1123,33 @@
 			port@1 {
 				reg = <1>;
 				du_out_lvds0: endpoint {
+					remote-endpoint = <&lvds0_in>;
+				};
+			};
+		};
+	};
+
+	lvds0: lvds@feb90000 {
+		compatible = "renesas,r8a7791-lvds";
+		reg = <0 0xfeb90000 0 0x1c>;
+		clocks = <&cpg CPG_MOD 726>;
+		power-domains = <&sysc R8A7791_PD_ALWAYS_ON>;
+		resets = <&cpg 726>;
+		status = "disabled";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				lvds0_in: endpoint {
+					remote-endpoint = <&du_out_lvds0>;
+				};
+			};
+			port@1 {
+				reg = <1>;
+				lvds0_out: endpoint {
 				};
 			};
 		};
-- 
Regards,

Laurent Pinchart

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v4 12/16] ARM: dts: r8a7792: Convert to new DU DT bindings

[Laurent Pinchart]

The DU DT bindings have been updated to drop the reg-names property.
Update the r8a7792 device tree accordingly.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 arch/arm/boot/dts/r8a7792.dtsi | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/arm/boot/dts/r8a7792.dtsi b/arch/arm/boot/dts/r8a7792.dtsi
index 3be15a158bad..c4a36a18f505 100644
--- a/arch/arm/boot/dts/r8a7792.dtsi
+++ b/arch/arm/boot/dts/r8a7792.dtsi
@@ -691,7 +691,6 @@
 		du: display@feb00000 {
 			compatible = "renesas,du-r8a7792";
 			reg = <0 0xfeb00000 0 0x40000>;
-			reg-names = "du";
 			interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 724>,
-- 
Regards,

Laurent Pinchart

[PATCH v4 12/16] ARM: dts: r8a7792: Convert to new DU DT bindings

[Laurent Pinchart]

The DU DT bindings have been updated to drop the reg-names property.
Update the r8a7792 device tree accordingly.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 arch/arm/boot/dts/r8a7792.dtsi | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/arm/boot/dts/r8a7792.dtsi b/arch/arm/boot/dts/r8a7792.dtsi
index 3be15a158bad..c4a36a18f505 100644
--- a/arch/arm/boot/dts/r8a7792.dtsi
+++ b/arch/arm/boot/dts/r8a7792.dtsi
@@ -691,7 +691,6 @@
 		du: display@feb00000 {
 			compatible = "renesas,du-r8a7792";
 			reg = <0 0xfeb00000 0 0x40000>;
-			reg-names = "du";
 			interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 724>,
-- 
Regards,

Laurent Pinchart

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v4 13/16] ARM: dts: r8a7793: Convert to new LVDS DT bindings

[Laurent Pinchart]

The internal LVDS encoder now has DT bindings separate from the DU. Port
the device tree over to the new model.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v3:

- Added power-domains and resets properties to LVDS nodes

Changes since v2:

- Fixed LVDS compatible string

Changes since v1:

- Remove the DU reg-names property
---
 arch/arm/boot/dts/r8a7793-gose.dts | 10 +++++++---
 arch/arm/boot/dts/r8a7793.dtsi     | 37 +++++++++++++++++++++++++++++++------
 2 files changed, 38 insertions(+), 9 deletions(-)

diff --git a/arch/arm/boot/dts/r8a7793-gose.dts b/arch/arm/boot/dts/r8a7793-gose.dts
index 51b3ffac8efa..c6121f9b72a8 100644
--- a/arch/arm/boot/dts/r8a7793-gose.dts
+++ b/arch/arm/boot/dts/r8a7793-gose.dts
@@ -303,10 +303,9 @@
 	pinctrl-names = "default";
 	status = "okay";
 
-	clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>, <&cpg CPG_MOD 726>,
+	clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>,
 		 <&x13_clk>, <&x2_clk>;
-	clock-names = "du.0", "du.1", "lvds.0",
-		      "dclkin.0", "dclkin.1";
+	clock-names = "du.0", "du.1", "dclkin.0", "dclkin.1";
 
 	ports {
 		port@0 {
@@ -314,6 +313,11 @@
 				remote-endpoint = <&adv7511_in>;
 			};
 		};
+	};
+};
+
+&lvds0 {
+	ports {
 		port@1 {
 			lvds_connector: endpoint {
 			};
diff --git a/arch/arm/boot/dts/r8a7793.dtsi b/arch/arm/boot/dts/r8a7793.dtsi
index 039b22517526..d3dc3e4a694b 100644
--- a/arch/arm/boot/dts/r8a7793.dtsi
+++ b/arch/arm/boot/dts/r8a7793.dtsi
@@ -976,15 +976,12 @@
 
 	du: display@feb00000 {
 		compatible = "renesas,du-r8a7793";
-		reg = <0 0xfeb00000 0 0x40000>,
-		      <0 0xfeb90000 0 0x1c>;
-		reg-names = "du", "lvds.0";
+		reg = <0 0xfeb00000 0 0x40000>;
 		interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&cpg CPG_MOD 724>,
-			 <&cpg CPG_MOD 723>,
-			 <&cpg CPG_MOD 726>;
-		clock-names = "du.0", "du.1", "lvds.0";
+			 <&cpg CPG_MOD 723>;
+		clock-names = "du.0", "du.1";
 		status = "disabled";
 
 		ports {
@@ -999,6 +996,34 @@
 			port@1 {
 				reg = <1>;
 				du_out_lvds0: endpoint {
+					remote-endpoint = <&lvds0_in>;
+				};
+			};
+		};
+	};
+
+	lvds0: lvds@feb90000 {
+		compatible = "renesas,r8a7793-lvds";
+		reg = <0 0xfeb90000 0 0x1c>;
+		clocks = <&cpg CPG_MOD 726>;
+		power-domains = <&sysc R8A7793_PD_ALWAYS_ON>;
+		resets = <&cpg 726>;
+
+		status = "disabled";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				lvds0_in: endpoint {
+					remote-endpoint = <&du_out_lvds0>;
+				};
+			};
+			port@1 {
+				reg = <1>;
+				lvds0_out: endpoint {
 				};
 			};
 		};
-- 
Regards,

Laurent Pinchart

[PATCH v4 13/16] ARM: dts: r8a7793: Convert to new LVDS DT bindings

[Laurent Pinchart]

The internal LVDS encoder now has DT bindings separate from the DU. Port
the device tree over to the new model.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v3:

- Added power-domains and resets properties to LVDS nodes

Changes since v2:

- Fixed LVDS compatible string

Changes since v1:

- Remove the DU reg-names property
---
 arch/arm/boot/dts/r8a7793-gose.dts | 10 +++++++---
 arch/arm/boot/dts/r8a7793.dtsi     | 37 +++++++++++++++++++++++++++++++------
 2 files changed, 38 insertions(+), 9 deletions(-)

diff --git a/arch/arm/boot/dts/r8a7793-gose.dts b/arch/arm/boot/dts/r8a7793-gose.dts
index 51b3ffac8efa..c6121f9b72a8 100644
--- a/arch/arm/boot/dts/r8a7793-gose.dts
+++ b/arch/arm/boot/dts/r8a7793-gose.dts
@@ -303,10 +303,9 @@
 	pinctrl-names = "default";
 	status = "okay";
 
-	clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>, <&cpg CPG_MOD 726>,
+	clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>,
 		 <&x13_clk>, <&x2_clk>;
-	clock-names = "du.0", "du.1", "lvds.0",
-		      "dclkin.0", "dclkin.1";
+	clock-names = "du.0", "du.1", "dclkin.0", "dclkin.1";
 
 	ports {
 		port@0 {
@@ -314,6 +313,11 @@
 				remote-endpoint = <&adv7511_in>;
 			};
 		};
+	};
+};
+
+&lvds0 {
+	ports {
 		port@1 {
 			lvds_connector: endpoint {
 			};
diff --git a/arch/arm/boot/dts/r8a7793.dtsi b/arch/arm/boot/dts/r8a7793.dtsi
index 039b22517526..d3dc3e4a694b 100644
--- a/arch/arm/boot/dts/r8a7793.dtsi
+++ b/arch/arm/boot/dts/r8a7793.dtsi
@@ -976,15 +976,12 @@
 
 	du: display@feb00000 {
 		compatible = "renesas,du-r8a7793";
-		reg = <0 0xfeb00000 0 0x40000>,
-		      <0 0xfeb90000 0 0x1c>;
-		reg-names = "du", "lvds.0";
+		reg = <0 0xfeb00000 0 0x40000>;
 		interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&cpg CPG_MOD 724>,
-			 <&cpg CPG_MOD 723>,
-			 <&cpg CPG_MOD 726>;
-		clock-names = "du.0", "du.1", "lvds.0";
+			 <&cpg CPG_MOD 723>;
+		clock-names = "du.0", "du.1";
 		status = "disabled";
 
 		ports {
@@ -999,6 +996,34 @@
 			port@1 {
 				reg = <1>;
 				du_out_lvds0: endpoint {
+					remote-endpoint = <&lvds0_in>;
+				};
+			};
+		};
+	};
+
+	lvds0: lvds@feb90000 {
+		compatible = "renesas,r8a7793-lvds";
+		reg = <0 0xfeb90000 0 0x1c>;
+		clocks = <&cpg CPG_MOD 726>;
+		power-domains = <&sysc R8A7793_PD_ALWAYS_ON>;
+		resets = <&cpg 726>;
+
+		status = "disabled";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				lvds0_in: endpoint {
+					remote-endpoint = <&du_out_lvds0>;
+				};
+			};
+			port@1 {
+				reg = <1>;
+				lvds0_out: endpoint {
 				};
 			};
 		};
-- 
Regards,

Laurent Pinchart

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v4 14/16] ARM: dts: r8a7794: Convert to new DU DT bindings

[Laurent Pinchart]

The DU DT bindings have been updated to drop the reg-names property.
Update the r8a7792 device tree accordingly.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 arch/arm/boot/dts/r8a7794.dtsi | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/arm/boot/dts/r8a7794.dtsi b/arch/arm/boot/dts/r8a7794.dtsi
index 106b4e1649ff..7d9da744a01d 100644
--- a/arch/arm/boot/dts/r8a7794.dtsi
+++ b/arch/arm/boot/dts/r8a7794.dtsi
@@ -999,7 +999,6 @@
 	du: display@feb00000 {
 		compatible = "renesas,du-r8a7794";
 		reg = <0 0xfeb00000 0 0x40000>;
-		reg-names = "du";
 		interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>;
-- 
Regards,

Laurent Pinchart

[PATCH v4 14/16] ARM: dts: r8a7794: Convert to new DU DT bindings

[Laurent Pinchart]

The DU DT bindings have been updated to drop the reg-names property.
Update the r8a7792 device tree accordingly.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 arch/arm/boot/dts/r8a7794.dtsi | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/arm/boot/dts/r8a7794.dtsi b/arch/arm/boot/dts/r8a7794.dtsi
index 106b4e1649ff..7d9da744a01d 100644
--- a/arch/arm/boot/dts/r8a7794.dtsi
+++ b/arch/arm/boot/dts/r8a7794.dtsi
@@ -999,7 +999,6 @@
 	du: display@feb00000 {
 		compatible = "renesas,du-r8a7794";
 		reg = <0 0xfeb00000 0 0x40000>;
-		reg-names = "du";
 		interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>;
-- 
Regards,

Laurent Pinchart

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v4 15/16] arm64: dts: renesas: r8a7795: Convert to new LVDS DT bindings

[Laurent Pinchart]

The internal LVDS encoder now has DT bindings separate from the DU. Port
the device tree over to the new model.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v3:

- Added power-domains and resets properties to LVDS nodes

Changes since v2:

- Fixed LVDS compatible string

Changes since v1:

- Remove the DU reg-names property
---
 .../boot/dts/renesas/r8a7795-es1-salvator-x.dts    |  3 +-
 arch/arm64/boot/dts/renesas/r8a7795-h3ulcb.dts     |  3 +-
 arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts |  3 +-
 .../arm64/boot/dts/renesas/r8a7795-salvator-xs.dts |  3 +-
 arch/arm64/boot/dts/renesas/r8a7795.dtsi           | 36 ++++++++++++++++++----
 5 files changed, 34 insertions(+), 14 deletions(-)

diff --git a/arch/arm64/boot/dts/renesas/r8a7795-es1-salvator-x.dts b/arch/arm64/boot/dts/renesas/r8a7795-es1-salvator-x.dts
index 4af9504489ee..c0faef1be32d 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795-es1-salvator-x.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7795-es1-salvator-x.dts
@@ -43,12 +43,11 @@
 		 <&cpg CPG_MOD 723>,
 		 <&cpg CPG_MOD 722>,
 		 <&cpg CPG_MOD 721>,
-		 <&cpg CPG_MOD 727>,
 		 <&versaclock5 1>,
 		 <&x21_clk>,
 		 <&x22_clk>,
 		 <&versaclock5 2>;
-	clock-names = "du.0", "du.1", "du.2", "du.3", "lvds.0",
+	clock-names = "du.0", "du.1", "du.2", "du.3",
 		      "dclkin.0", "dclkin.1", "dclkin.2", "dclkin.3";
 };
 
diff --git a/arch/arm64/boot/dts/renesas/r8a7795-h3ulcb.dts b/arch/arm64/boot/dts/renesas/r8a7795-h3ulcb.dts
index 0afe777973de..f0d6528c05eb 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795-h3ulcb.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7795-h3ulcb.dts
@@ -44,11 +44,10 @@
 		 <&cpg CPG_MOD 723>,
 		 <&cpg CPG_MOD 722>,
 		 <&cpg CPG_MOD 721>,
-		 <&cpg CPG_MOD 727>,
 		 <&versaclock5 1>,
 		 <&versaclock5 3>,
 		 <&versaclock5 4>,
 		 <&versaclock5 2>;
-	clock-names = "du.0", "du.1", "du.2", "du.3", "lvds.0",
+	clock-names = "du.0", "du.1", "du.2", "du.3",
 		      "dclkin.0", "dclkin.1", "dclkin.2", "dclkin.3";
 };
diff --git a/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
index cd9587ef90f4..eb2a9f3e4f28 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
@@ -43,12 +43,11 @@
 		 <&cpg CPG_MOD 723>,
 		 <&cpg CPG_MOD 722>,
 		 <&cpg CPG_MOD 721>,
-		 <&cpg CPG_MOD 727>,
 		 <&versaclock5 1>,
 		 <&x21_clk>,
 		 <&x22_clk>,
 		 <&versaclock5 2>;
-	clock-names = "du.0", "du.1", "du.2", "du.3", "lvds.0",
+	clock-names = "du.0", "du.1", "du.2", "du.3",
 		      "dclkin.0", "dclkin.1", "dclkin.2", "dclkin.3";
 };
 
diff --git a/arch/arm64/boot/dts/renesas/r8a7795-salvator-xs.dts b/arch/arm64/boot/dts/renesas/r8a7795-salvator-xs.dts
index 15617e30356a..db3afa438543 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795-salvator-xs.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7795-salvator-xs.dts
@@ -43,12 +43,11 @@
 		 <&cpg CPG_MOD 723>,
 		 <&cpg CPG_MOD 722>,
 		 <&cpg CPG_MOD 721>,
-		 <&cpg CPG_MOD 727>,
 		 <&versaclock6 1>,
 		 <&x21_clk>,
 		 <&x22_clk>,
 		 <&versaclock6 2>;
-	clock-names = "du.0", "du.1", "du.2", "du.3", "lvds.0",
+	clock-names = "du.0", "du.1", "du.2", "du.3",
 		      "dclkin.0", "dclkin.1", "dclkin.2", "dclkin.3";
 };
 
diff --git a/arch/arm64/boot/dts/renesas/r8a7795.dtsi b/arch/arm64/boot/dts/renesas/r8a7795.dtsi
index d12df6f2ff09..86ac1e4d3b5e 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a7795.dtsi
@@ -2273,9 +2273,7 @@
 
 		du: display@feb00000 {
 			compatible = "renesas,du-r8a7795";
-			reg = <0 0xfeb00000 0 0x80000>,
-			      <0 0xfeb90000 0 0x14>;
-			reg-names = "du", "lvds.0";
+			reg = <0 0xfeb00000 0 0x80000>;
 			interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 269 IRQ_TYPE_LEVEL_HIGH>,
@@ -2283,9 +2281,8 @@
 			clocks = <&cpg CPG_MOD 724>,
 				 <&cpg CPG_MOD 723>,
 				 <&cpg CPG_MOD 722>,
-				 <&cpg CPG_MOD 721>,
-				 <&cpg CPG_MOD 727>;
-			clock-names = "du.0", "du.1", "du.2", "du.3", "lvds.0";
+				 <&cpg CPG_MOD 721>;
+			clock-names = "du.0", "du.1", "du.2", "du.3";
 			vsps = <&vspd0 0 &vspd1 0 &vspd2 0 &vspd0 1>;
 			status = "disabled";
 
@@ -2313,6 +2310,33 @@
 				port@3 {
 					reg = <3>;
 					du_out_lvds0: endpoint {
+						remote-endpoint = <&lvds0_in>;
+					};
+				};
+			};
+		};
+
+		lvds0: lvds@feb90000 {
+			compatible = "renesas,r8a7795-lvds";
+			reg = <0 0xfeb90000 0 0x14>;
+			clocks = <&cpg CPG_MOD 727>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
+			resets = <&cpg 727>;
+			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+					lvds0_in: endpoint {
+						remote-endpoint = <&du_out_lvds0>;
+					};
+				};
+				port@1 {
+					reg = <1>;
+					lvds0_out: endpoint {
 					};
 				};
 			};
-- 
Regards,

Laurent Pinchart

[PATCH v4 15/16] arm64: dts: renesas: r8a7795: Convert to new LVDS DT bindings

[Laurent Pinchart]

The internal LVDS encoder now has DT bindings separate from the DU. Port
the device tree over to the new model.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v3:

- Added power-domains and resets properties to LVDS nodes

Changes since v2:

- Fixed LVDS compatible string

Changes since v1:

- Remove the DU reg-names property
---
 .../boot/dts/renesas/r8a7795-es1-salvator-x.dts    |  3 +-
 arch/arm64/boot/dts/renesas/r8a7795-h3ulcb.dts     |  3 +-
 arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts |  3 +-
 .../arm64/boot/dts/renesas/r8a7795-salvator-xs.dts |  3 +-
 arch/arm64/boot/dts/renesas/r8a7795.dtsi           | 36 ++++++++++++++++++----
 5 files changed, 34 insertions(+), 14 deletions(-)

diff --git a/arch/arm64/boot/dts/renesas/r8a7795-es1-salvator-x.dts b/arch/arm64/boot/dts/renesas/r8a7795-es1-salvator-x.dts
index 4af9504489ee..c0faef1be32d 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795-es1-salvator-x.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7795-es1-salvator-x.dts
@@ -43,12 +43,11 @@
 		 <&cpg CPG_MOD 723>,
 		 <&cpg CPG_MOD 722>,
 		 <&cpg CPG_MOD 721>,
-		 <&cpg CPG_MOD 727>,
 		 <&versaclock5 1>,
 		 <&x21_clk>,
 		 <&x22_clk>,
 		 <&versaclock5 2>;
-	clock-names = "du.0", "du.1", "du.2", "du.3", "lvds.0",
+	clock-names = "du.0", "du.1", "du.2", "du.3",
 		      "dclkin.0", "dclkin.1", "dclkin.2", "dclkin.3";
 };
 
diff --git a/arch/arm64/boot/dts/renesas/r8a7795-h3ulcb.dts b/arch/arm64/boot/dts/renesas/r8a7795-h3ulcb.dts
index 0afe777973de..f0d6528c05eb 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795-h3ulcb.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7795-h3ulcb.dts
@@ -44,11 +44,10 @@
 		 <&cpg CPG_MOD 723>,
 		 <&cpg CPG_MOD 722>,
 		 <&cpg CPG_MOD 721>,
-		 <&cpg CPG_MOD 727>,
 		 <&versaclock5 1>,
 		 <&versaclock5 3>,
 		 <&versaclock5 4>,
 		 <&versaclock5 2>;
-	clock-names = "du.0", "du.1", "du.2", "du.3", "lvds.0",
+	clock-names = "du.0", "du.1", "du.2", "du.3",
 		      "dclkin.0", "dclkin.1", "dclkin.2", "dclkin.3";
 };
diff --git a/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
index cd9587ef90f4..eb2a9f3e4f28 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
@@ -43,12 +43,11 @@
 		 <&cpg CPG_MOD 723>,
 		 <&cpg CPG_MOD 722>,
 		 <&cpg CPG_MOD 721>,
-		 <&cpg CPG_MOD 727>,
 		 <&versaclock5 1>,
 		 <&x21_clk>,
 		 <&x22_clk>,
 		 <&versaclock5 2>;
-	clock-names = "du.0", "du.1", "du.2", "du.3", "lvds.0",
+	clock-names = "du.0", "du.1", "du.2", "du.3",
 		      "dclkin.0", "dclkin.1", "dclkin.2", "dclkin.3";
 };
 
diff --git a/arch/arm64/boot/dts/renesas/r8a7795-salvator-xs.dts b/arch/arm64/boot/dts/renesas/r8a7795-salvator-xs.dts
index 15617e30356a..db3afa438543 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795-salvator-xs.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7795-salvator-xs.dts
@@ -43,12 +43,11 @@
 		 <&cpg CPG_MOD 723>,
 		 <&cpg CPG_MOD 722>,
 		 <&cpg CPG_MOD 721>,
-		 <&cpg CPG_MOD 727>,
 		 <&versaclock6 1>,
 		 <&x21_clk>,
 		 <&x22_clk>,
 		 <&versaclock6 2>;
-	clock-names = "du.0", "du.1", "du.2", "du.3", "lvds.0",
+	clock-names = "du.0", "du.1", "du.2", "du.3",
 		      "dclkin.0", "dclkin.1", "dclkin.2", "dclkin.3";
 };
 
diff --git a/arch/arm64/boot/dts/renesas/r8a7795.dtsi b/arch/arm64/boot/dts/renesas/r8a7795.dtsi
index d12df6f2ff09..86ac1e4d3b5e 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a7795.dtsi
@@ -2273,9 +2273,7 @@
 
 		du: display@feb00000 {
 			compatible = "renesas,du-r8a7795";
-			reg = <0 0xfeb00000 0 0x80000>,
-			      <0 0xfeb90000 0 0x14>;
-			reg-names = "du", "lvds.0";
+			reg = <0 0xfeb00000 0 0x80000>;
 			interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 269 IRQ_TYPE_LEVEL_HIGH>,
@@ -2283,9 +2281,8 @@
 			clocks = <&cpg CPG_MOD 724>,
 				 <&cpg CPG_MOD 723>,
 				 <&cpg CPG_MOD 722>,
-				 <&cpg CPG_MOD 721>,
-				 <&cpg CPG_MOD 727>;
-			clock-names = "du.0", "du.1", "du.2", "du.3", "lvds.0";
+				 <&cpg CPG_MOD 721>;
+			clock-names = "du.0", "du.1", "du.2", "du.3";
 			vsps = <&vspd0 0 &vspd1 0 &vspd2 0 &vspd0 1>;
 			status = "disabled";
 
@@ -2313,6 +2310,33 @@
 				port@3 {
 					reg = <3>;
 					du_out_lvds0: endpoint {
+						remote-endpoint = <&lvds0_in>;
+					};
+				};
+			};
+		};
+
+		lvds0: lvds@feb90000 {
+			compatible = "renesas,r8a7795-lvds";
+			reg = <0 0xfeb90000 0 0x14>;
+			clocks = <&cpg CPG_MOD 727>;
+			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
+			resets = <&cpg 727>;
+			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+					lvds0_in: endpoint {
+						remote-endpoint = <&du_out_lvds0>;
+					};
+				};
+				port@1 {
+					reg = <1>;
+					lvds0_out: endpoint {
 					};
 				};
 			};
-- 
Regards,

Laurent Pinchart

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v4 16/16] arm64: dts: renesas: r8a7796: Convert to new LVDS DT bindings

[Laurent Pinchart]

The internal LVDS encoder now has DT bindings separate from the DU. Port
the device tree over to the new model.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v3:

- Added power-domains and resets properties to LVDS nodes
- Dropped bogus changes from the rcar-du driver

Changes since v2:

- Fixed LVDS compatible string

Changes since v1:

- Remove the DU reg-names property
---
 arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts     |  3 +-
 arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts |  3 +-
 arch/arm64/boot/dts/renesas/r8a7796.dtsi           | 36 ++++++++++++++++++----
 3 files changed, 32 insertions(+), 10 deletions(-)

diff --git a/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts b/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
index daee1f1a3f68..21bd679062f3 100644
--- a/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
@@ -33,10 +33,9 @@
 	clocks = <&cpg CPG_MOD 724>,
 		 <&cpg CPG_MOD 723>,
 		 <&cpg CPG_MOD 722>,
-		 <&cpg CPG_MOD 727>,
 		 <&versaclock5 1>,
 		 <&versaclock5 3>,
 		 <&versaclock5 2>;
-	clock-names = "du.0", "du.1", "du.2", "lvds.0",
+	clock-names = "du.0", "du.1", "du.2",
 		      "dclkin.0", "dclkin.1", "dclkin.2";
 };
diff --git a/arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts b/arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts
index 2ba992946c50..9524fcb6bc5c 100644
--- a/arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts
@@ -32,11 +32,10 @@
 	clocks = <&cpg CPG_MOD 724>,
 		 <&cpg CPG_MOD 723>,
 		 <&cpg CPG_MOD 722>,
-		 <&cpg CPG_MOD 727>,
 		 <&versaclock5 1>,
 		 <&x21_clk>,
 		 <&versaclock5 2>;
-	clock-names = "du.0", "du.1", "du.2", "lvds.0",
+	clock-names = "du.0", "du.1", "du.2",
 		      "dclkin.0", "dclkin.1", "dclkin.2";
 };
 
diff --git a/arch/arm64/boot/dts/renesas/r8a7796.dtsi b/arch/arm64/boot/dts/renesas/r8a7796.dtsi
index c5192d513d7d..c1506c5e27b1 100644
--- a/arch/arm64/boot/dts/renesas/r8a7796.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a7796.dtsi
@@ -1924,17 +1924,14 @@
 
 		du: display@feb00000 {
 			compatible = "renesas,du-r8a7796";
-			reg = <0 0xfeb00000 0 0x70000>,
-			      <0 0xfeb90000 0 0x14>;
-			reg-names = "du", "lvds.0";
+			reg = <0 0xfeb00000 0 0x70000>;
 			interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 269 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 724>,
 				 <&cpg CPG_MOD 723>,
-				 <&cpg CPG_MOD 722>,
-				 <&cpg CPG_MOD 727>;
-			clock-names = "du.0", "du.1", "du.2", "lvds.0";
+				 <&cpg CPG_MOD 722>;
+			clock-names = "du.0", "du.1", "du.2";
 			status = "disabled";
 
 			vsps = <&vspd0 &vspd1 &vspd2>;
@@ -1957,6 +1954,33 @@
 				port@2 {
 					reg = <2>;
 					du_out_lvds0: endpoint {
+						remote-endpoint = <&lvds0_in>;
+					};
+				};
+			};
+		};
+
+		lvds0: lvds@feb90000 {
+			compatible = "renesas,r8a7796-lvds";
+			reg = <0 0xfeb90000 0 0x14>;
+			clocks = <&cpg CPG_MOD 727>;
+			power-domains = <&sysc R8A7796_PD_ALWAYS_ON>;
+			resets = <&cpg 727>;
+			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+					lvds0_in: endpoint {
+						remote-endpoint = <&du_out_lvds0>;
+					};
+				};
+				port@1 {
+					reg = <1>;
+					lvds0_out: endpoint {
 					};
 				};
 			};
-- 
Regards,

Laurent Pinchart

[PATCH v4 16/16] arm64: dts: renesas: r8a7796: Convert to new LVDS DT bindings

[Laurent Pinchart]

The internal LVDS encoder now has DT bindings separate from the DU. Port
the device tree over to the new model.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v3:

- Added power-domains and resets properties to LVDS nodes
- Dropped bogus changes from the rcar-du driver

Changes since v2:

- Fixed LVDS compatible string

Changes since v1:

- Remove the DU reg-names property
---
 arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts     |  3 +-
 arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts |  3 +-
 arch/arm64/boot/dts/renesas/r8a7796.dtsi           | 36 ++++++++++++++++++----
 3 files changed, 32 insertions(+), 10 deletions(-)

diff --git a/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts b/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
index daee1f1a3f68..21bd679062f3 100644
--- a/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
@@ -33,10 +33,9 @@
 	clocks = <&cpg CPG_MOD 724>,
 		 <&cpg CPG_MOD 723>,
 		 <&cpg CPG_MOD 722>,
-		 <&cpg CPG_MOD 727>,
 		 <&versaclock5 1>,
 		 <&versaclock5 3>,
 		 <&versaclock5 2>;
-	clock-names = "du.0", "du.1", "du.2", "lvds.0",
+	clock-names = "du.0", "du.1", "du.2",
 		      "dclkin.0", "dclkin.1", "dclkin.2";
 };
diff --git a/arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts b/arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts
index 2ba992946c50..9524fcb6bc5c 100644
--- a/arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts
@@ -32,11 +32,10 @@
 	clocks = <&cpg CPG_MOD 724>,
 		 <&cpg CPG_MOD 723>,
 		 <&cpg CPG_MOD 722>,
-		 <&cpg CPG_MOD 727>,
 		 <&versaclock5 1>,
 		 <&x21_clk>,
 		 <&versaclock5 2>;
-	clock-names = "du.0", "du.1", "du.2", "lvds.0",
+	clock-names = "du.0", "du.1", "du.2",
 		      "dclkin.0", "dclkin.1", "dclkin.2";
 };
 
diff --git a/arch/arm64/boot/dts/renesas/r8a7796.dtsi b/arch/arm64/boot/dts/renesas/r8a7796.dtsi
index c5192d513d7d..c1506c5e27b1 100644
--- a/arch/arm64/boot/dts/renesas/r8a7796.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a7796.dtsi
@@ -1924,17 +1924,14 @@
 
 		du: display@feb00000 {
 			compatible = "renesas,du-r8a7796";
-			reg = <0 0xfeb00000 0 0x70000>,
-			      <0 0xfeb90000 0 0x14>;
-			reg-names = "du", "lvds.0";
+			reg = <0 0xfeb00000 0 0x70000>;
 			interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 269 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 724>,
 				 <&cpg CPG_MOD 723>,
-				 <&cpg CPG_MOD 722>,
-				 <&cpg CPG_MOD 727>;
-			clock-names = "du.0", "du.1", "du.2", "lvds.0";
+				 <&cpg CPG_MOD 722>;
+			clock-names = "du.0", "du.1", "du.2";
 			status = "disabled";
 
 			vsps = <&vspd0 &vspd1 &vspd2>;
@@ -1957,6 +1954,33 @@
 				port@2 {
 					reg = <2>;
 					du_out_lvds0: endpoint {
+						remote-endpoint = <&lvds0_in>;
+					};
+				};
+			};
+		};
+
+		lvds0: lvds@feb90000 {
+			compatible = "renesas,r8a7796-lvds";
+			reg = <0 0xfeb90000 0 0x14>;
+			clocks = <&cpg CPG_MOD 727>;
+			power-domains = <&sysc R8A7796_PD_ALWAYS_ON>;
+			resets = <&cpg 727>;
+			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+					lvds0_in: endpoint {
+						remote-endpoint = <&du_out_lvds0>;
+					};
+				};
+				port@1 {
+					reg = <1>;
+					lvds0_out: endpoint {
 					};
 				};
 			};
-- 
Regards,

Laurent Pinchart

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH v4 07/16] i2c: demux: Use changeset helpers for clarity

[Wolfram Sang]

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On Wed, Feb 21, 2018 at 01:10:37AM +0200, Laurent Pinchart wrote:
> From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> 
> The changeset helpers are easier to use, use them instead of
> using the static property.
> 
> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> Acked-by: Wolfram Sang <wsa@the-dreams.de>

My ack still holds. Good luck pushing this series!


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Re: [PATCH v4 07/16] i2c: demux: Use changeset helpers for clarity

[Wolfram Sang]

[-- Attachment #1.1: Type: text/plain, Size: 400 bytes --]

On Wed, Feb 21, 2018 at 01:10:37AM +0200, Laurent Pinchart wrote:
> From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> 
> The changeset helpers are easier to use, use them instead of
> using the static property.
> 
> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> Acked-by: Wolfram Sang <wsa@the-dreams.de>

My ack still holds. Good luck pushing this series!


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Re: [PATCH v4 14/16] ARM: dts: r8a7794: Convert to new DU DT bindings

[Sergei Shtylyov]

Hello!

On 2/21/2018 2:10 AM, Laurent Pinchart wrote:

> The DU DT bindings have been updated to drop the reg-names property.
> Update the r8a7792 device tree accordingly.

    Apparently r8a7794.

> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
[...]

MBR, Sergei

Re: [PATCH v4 14/16] ARM: dts: r8a7794: Convert to new DU DT bindings

[Sergei Shtylyov]

Hello!

On 2/21/2018 2:10 AM, Laurent Pinchart wrote:

> The DU DT bindings have been updated to drop the reg-names property.
> Update the r8a7792 device tree accordingly.

    Apparently r8a7794.

> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
[...]

MBR, Sergei
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Re: [PATCH v4 01/16] dt-bindings: display: renesas: Add R-Car LVDS encoder DT bindings

[Sergei Shtylyov]

On 2/21/2018 2:10 AM, Laurent Pinchart wrote:

> The Renesas R-Car Gen2 and Gen3 SoCs have internal LVDS encoders. Add
> corresponding device tree bindings.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> ---
> Changes since v1:
> 
> - Move the SoC name before the IP name in compatible strings
> - Rename parallel input to parallel RGB input
> - Fixed "renesas,r8a7743-lvds" description
> - Document the resets property
> - Fixed typo
> ---
>   .../bindings/display/bridge/renesas,lvds.txt       | 56 ++++++++++++++++++++++
>   MAINTAINERS                                        |  1 +
>   2 files changed, 57 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
> new file mode 100644
> index 000000000000..2b19ce51ec07
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
> @@ -0,0 +1,56 @@
> +Renesas R-Car LVDS Encoder
> +==========================
> +
> +These DT bindings describe the LVDS encoder embedded in the Renesas R-Car
> +Gen2, R-Car Gen3 and RZ/G SoCs.
> +
> +Required properties:
> +
> +- compatible : Shall contain one of
> +  - "renesas,r8a7743-lvds" for R8A7743 (RZ/G1M) compatible LVDS encoders
> +  - "renesas,r8a7790-lvds" for R8A7790 (R-Car H2) compatible LVDS encoders
> +  - "renesas,r8a7791-lvds" for R8A7791 (R-Car M2-W) compatible LVDS encoders
> +  - "renesas,r8a7793-lvds" for R8A7791 (R-Car M2-N) compatible LVDS encoders
> +  - "renesas,r8a7795-lvds" for R8A7795 (R-Car H3) compatible LVDS encoders
> +  - "renesas,r8a7796-lvds" for R8A7796 (R-Car M3-W) compatible LVDS encoders
> +
> +- reg: Base address and length for the memory-mapped registers
> +- clocks: A phandle + clock-specifier pair for the functional clock
> +- resets: A phandle + reset specifier for the module reset
> +
> +Required nodes:
> +
> +The LVDS encoder has two video ports. Their connections are modelled using the
> +OF graph bindings specified in Documentation/devicetree/bindings/graph.txt.
> +
> +- Video port 0 corresponds to the parallel RGB input
> +- Video port 1 corresponds to the LVDS output
> +
> +Each port shall have a single endpoint.
> +
> +
> +Example:
> +
> +	lvds0: lvds@feb90000 {

    "lvds-encoder@feb90000" maybe? And do we need a # in the label if the 
encoder is alone in DT anyway?

[...]

MBR, Sergei
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Re: [PATCH v4 01/16] dt-bindings: display: renesas: Add R-Car LVDS encoder DT bindings

[Sergei Shtylyov]

On 2/21/2018 2:10 AM, Laurent Pinchart wrote:

> The Renesas R-Car Gen2 and Gen3 SoCs have internal LVDS encoders. Add
> corresponding device tree bindings.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> ---
> Changes since v1:
> 
> - Move the SoC name before the IP name in compatible strings
> - Rename parallel input to parallel RGB input
> - Fixed "renesas,r8a7743-lvds" description
> - Document the resets property
> - Fixed typo
> ---
>   .../bindings/display/bridge/renesas,lvds.txt       | 56 ++++++++++++++++++++++
>   MAINTAINERS                                        |  1 +
>   2 files changed, 57 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
> new file mode 100644
> index 000000000000..2b19ce51ec07
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
> @@ -0,0 +1,56 @@
> +Renesas R-Car LVDS Encoder
> +==========================
> +
> +These DT bindings describe the LVDS encoder embedded in the Renesas R-Car
> +Gen2, R-Car Gen3 and RZ/G SoCs.
> +
> +Required properties:
> +
> +- compatible : Shall contain one of
> +  - "renesas,r8a7743-lvds" for R8A7743 (RZ/G1M) compatible LVDS encoders
> +  - "renesas,r8a7790-lvds" for R8A7790 (R-Car H2) compatible LVDS encoders
> +  - "renesas,r8a7791-lvds" for R8A7791 (R-Car M2-W) compatible LVDS encoders
> +  - "renesas,r8a7793-lvds" for R8A7791 (R-Car M2-N) compatible LVDS encoders
> +  - "renesas,r8a7795-lvds" for R8A7795 (R-Car H3) compatible LVDS encoders
> +  - "renesas,r8a7796-lvds" for R8A7796 (R-Car M3-W) compatible LVDS encoders
> +
> +- reg: Base address and length for the memory-mapped registers
> +- clocks: A phandle + clock-specifier pair for the functional clock
> +- resets: A phandle + reset specifier for the module reset
> +
> +Required nodes:
> +
> +The LVDS encoder has two video ports. Their connections are modelled using the
> +OF graph bindings specified in Documentation/devicetree/bindings/graph.txt.
> +
> +- Video port 0 corresponds to the parallel RGB input
> +- Video port 1 corresponds to the LVDS output
> +
> +Each port shall have a single endpoint.
> +
> +
> +Example:
> +
> +	lvds0: lvds@feb90000 {

    "lvds-encoder@feb90000" maybe? And do we need a # in the label if the 
encoder is alone in DT anyway?

[...]

MBR, Sergei

Re: [PATCH v4 04/16] of: changesets: Introduce changeset helper methods

[Geert Uytterhoeven]

Hi Laurent,

On Wed, Feb 21, 2018 at 12:10 AM, Laurent Pinchart
<laurent.pinchart+renesas@ideasonboard.com> wrote:
> From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>
> Changesets are very powerful, but the lack of a helper API
> makes using them cumbersome. Introduce a simple copy based
> API that makes things considerably easier.
>
> To wit, adding a property using the raw API.
>
>         struct property *prop;
>         prop = kzalloc(sizeof(*prop)), GFP_KERNEL);
>         prop->name = kstrdup("compatible");
>         prop->value = kstrdup("foo,bar");
>         prop->length = strlen(prop->value) + 1;
>         of_changeset_add_property(ocs, np, prop);
>
> while using the helper API
>
>         of_changeset_add_property_string(ocs, np, "compatible",
>                         "foo,bar");
>
> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> [Fixed memory leak in __of_changeset_add_update_property_copy()]
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

You missed one fix I have in my topic/overlays branch
https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git/commit/?h=topic/overlays&id=150f95b9dec77ce371c229f7ac4d6dd8620bef4a

> --- a/include/linux/of.h
> +++ b/include/linux/of.h

> +/**
> + * of_changeset_add_property_u32 - Create a new u32 property
> + *
> + * @ocs:       changeset pointer
> + * @np:                device node pointer
> + * @name:      name of the property
> + * @val:       value in host endian format
> + *
> + * Adds a u32 property to the changeset.
> + *
> + * Returns zero on success, a negative error value otherwise.
> + */
> +static inline int of_changeset_add_property_u32(struct of_changeset *ocs,
> +               struct device_node *np, const char *name, u32 val)
> +{
> +       val = cpu_to_be32(val);

You must use an intermediate, to avoid complaints from sparse:

    __be32 x = cpu_to_be32(val);

> +       return __of_changeset_add_update_property_copy(ocs, np, name, &val,
> +                       sizeof(val), false);

s/val/x/

> +}
> +
> +/**
> + * of_changeset_update_property_u32 - Update u32 property
> + *
> + * @ocs:       changeset pointer
> + * @np:                device node pointer
> + * @name:      name of the property
> + * @val:       value in host endian format
> + *
> + * Updates a u32 property to the changeset.
> + *
> + * Returns zero on success, a negative error value otherwise.
> + */
> +static inline int of_changeset_update_property_u32(
> +       struct of_changeset *ocs, struct device_node *np,
> +       const char *name, u32 val)
> +{
> +       val = cpu_to_be32(val);

Oh, a new one.

> +       return __of_changeset_add_update_property_copy(ocs, np, name, &val,
> +                       sizeof(val), true);
> +}

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH v4 04/16] of: changesets: Introduce changeset helper methods

[Geert Uytterhoeven]

Hi Laurent,

On Wed, Feb 21, 2018 at 12:10 AM, Laurent Pinchart
<laurent.pinchart+renesas@ideasonboard.com> wrote:
> From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>
> Changesets are very powerful, but the lack of a helper API
> makes using them cumbersome. Introduce a simple copy based
> API that makes things considerably easier.
>
> To wit, adding a property using the raw API.
>
>         struct property *prop;
>         prop = kzalloc(sizeof(*prop)), GFP_KERNEL);
>         prop->name = kstrdup("compatible");
>         prop->value = kstrdup("foo,bar");
>         prop->length = strlen(prop->value) + 1;
>         of_changeset_add_property(ocs, np, prop);
>
> while using the helper API
>
>         of_changeset_add_property_string(ocs, np, "compatible",
>                         "foo,bar");
>
> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> [Fixed memory leak in __of_changeset_add_update_property_copy()]
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

You missed one fix I have in my topic/overlays branch
https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git/commit/?h=topic/overlays&id=150f95b9dec77ce371c229f7ac4d6dd8620bef4a

> --- a/include/linux/of.h
> +++ b/include/linux/of.h

> +/**
> + * of_changeset_add_property_u32 - Create a new u32 property
> + *
> + * @ocs:       changeset pointer
> + * @np:                device node pointer
> + * @name:      name of the property
> + * @val:       value in host endian format
> + *
> + * Adds a u32 property to the changeset.
> + *
> + * Returns zero on success, a negative error value otherwise.
> + */
> +static inline int of_changeset_add_property_u32(struct of_changeset *ocs,
> +               struct device_node *np, const char *name, u32 val)
> +{
> +       val = cpu_to_be32(val);

You must use an intermediate, to avoid complaints from sparse:

    __be32 x = cpu_to_be32(val);

> +       return __of_changeset_add_update_property_copy(ocs, np, name, &val,
> +                       sizeof(val), false);

s/val/x/

> +}
> +
> +/**
> + * of_changeset_update_property_u32 - Update u32 property
> + *
> + * @ocs:       changeset pointer
> + * @np:                device node pointer
> + * @name:      name of the property
> + * @val:       value in host endian format
> + *
> + * Updates a u32 property to the changeset.
> + *
> + * Returns zero on success, a negative error value otherwise.
> + */
> +static inline int of_changeset_update_property_u32(
> +       struct of_changeset *ocs, struct device_node *np,
> +       const char *name, u32 val)
> +{
> +       val = cpu_to_be32(val);

Oh, a new one.

> +       return __of_changeset_add_update_property_copy(ocs, np, name, &val,
> +                       sizeof(val), true);
> +}

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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Re: [PATCH v4 03/16] of: dynamic: Add __of_node_dupv()

[Geert Uytterhoeven]

Hi Laurent,

On Wed, Feb 21, 2018 at 12:10 AM, Laurent Pinchart
<laurent.pinchart+renesas@ideasonboard.com> wrote:
> From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>
> Add an __of_node_dupv() private method and make __of_node_dup() use it.
> This is required for the subsequent changeset accessors which will
> make use of it.
>
> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
>  drivers/of/dynamic.c | 29 +++++++++++++++++++++++------
>  1 file changed, 23 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
> index 7bb33d22b4e2..4ffd04925fdf 100644
> --- a/drivers/of/dynamic.c
> +++ b/drivers/of/dynamic.c
> @@ -382,8 +382,9 @@ struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags)
>  }
>
>  /**
> - * __of_node_dup() - Duplicate or create an empty device node dynamically.
> - * @fmt: Format string (plus vargs) for new full name of the device node
> + * __of_node_dupv() - Duplicate or create an empty device node dynamically.
> + * @fmt: Format string for new full name of the device node
> + * @vargs: va_list containing the arugments for the node full name
>   *
>   * Create an device tree node, either by duplicating an empty node or by allocating
>   * an empty one suitable for further modification.  The node data are
> @@ -391,17 +392,15 @@ struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags)
>   * OF_DETACHED bits set. Returns the newly allocated node or NULL on out of
>   * memory error.
>   */
> -struct device_node *__of_node_dup(const struct device_node *np, const char *fmt, ...)
> +struct device_node *__of_node_dupv(const struct device_node *np,

static, cfr.
https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git/commit/?h=topic/overlays&id=c45324e1807dd708344c9a478b777b68aca11cdf

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH v4 03/16] of: dynamic: Add __of_node_dupv()

[Geert Uytterhoeven]

Hi Laurent,

On Wed, Feb 21, 2018 at 12:10 AM, Laurent Pinchart
<laurent.pinchart+renesas@ideasonboard.com> wrote:
> From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>
> Add an __of_node_dupv() private method and make __of_node_dup() use it.
> This is required for the subsequent changeset accessors which will
> make use of it.
>
> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
>  drivers/of/dynamic.c | 29 +++++++++++++++++++++++------
>  1 file changed, 23 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
> index 7bb33d22b4e2..4ffd04925fdf 100644
> --- a/drivers/of/dynamic.c
> +++ b/drivers/of/dynamic.c
> @@ -382,8 +382,9 @@ struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags)
>  }
>
>  /**
> - * __of_node_dup() - Duplicate or create an empty device node dynamically.
> - * @fmt: Format string (plus vargs) for new full name of the device node
> + * __of_node_dupv() - Duplicate or create an empty device node dynamically.
> + * @fmt: Format string for new full name of the device node
> + * @vargs: va_list containing the arugments for the node full name
>   *
>   * Create an device tree node, either by duplicating an empty node or by allocating
>   * an empty one suitable for further modification.  The node data are
> @@ -391,17 +392,15 @@ struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags)
>   * OF_DETACHED bits set. Returns the newly allocated node or NULL on out of
>   * memory error.
>   */
> -struct device_node *__of_node_dup(const struct device_node *np, const char *fmt, ...)
> +struct device_node *__of_node_dupv(const struct device_node *np,

static, cfr.
https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git/commit/?h=topic/overlays&id=c45324e1807dd708344c9a478b777b68aca11cdf

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
_______________________________________________
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https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH v4 03/16] of: dynamic: Add __of_node_dupv()

[Laurent Pinchart]

Hi Geert,

On Wednesday, 21 February 2018 12:26:45 EET Geert Uytterhoeven wrote:
> On Wed, Feb 21, 2018 at 12:10 AM, Laurent Pinchart wrote:
> > From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> > 
> > Add an __of_node_dupv() private method and make __of_node_dup() use it.
> > This is required for the subsequent changeset accessors which will
> > make use of it.
> > 
> > Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas@ideasonboard.com>
> > ---
> > 
> >  drivers/of/dynamic.c | 29 +++++++++++++++++++++++------
> >  1 file changed, 23 insertions(+), 6 deletions(-)
> > 
> > diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
> > index 7bb33d22b4e2..4ffd04925fdf 100644
> > --- a/drivers/of/dynamic.c
> > +++ b/drivers/of/dynamic.c
> > @@ -382,8 +382,9 @@ struct property *__of_prop_dup(const struct property
> > *prop, gfp_t allocflags)> 
> >  }
> >  
> >  /**
> > 
> > - * __of_node_dup() - Duplicate or create an empty device node
> > dynamically.
> > - * @fmt: Format string (plus vargs) for new full name of the device node
> > + * __of_node_dupv() - Duplicate or create an empty device node
> > dynamically. + * @fmt: Format string for new full name of the device node
> > + * @vargs: va_list containing the arugments for the node full name
> > 
> >   *
> >   * Create an device tree node, either by duplicating an empty node or by
> >   allocating * an empty one suitable for further modification.  The node
> >   data are> 
> > @@ -391,17 +392,15 @@ struct property *__of_prop_dup(const struct property
> > *prop, gfp_t allocflags)> 
> >   * OF_DETACHED bits set. Returns the newly allocated node or NULL on out
> >   of
> >   * memory error.
> >   */
> > 
> > -struct device_node *__of_node_dup(const struct device_node *np, const
> > char *fmt, ...) +struct device_node *__of_node_dupv(const struct
> > device_node *np,
> 
> static, cfr.
> https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git/co
> mmit/?h=topic/overlays&id=c45324e1807dd708344c9a478b777b68aca11cdf

I'll fix that in the next version.

-- 
Regards,

Laurent Pinchart

Re: [PATCH v4 03/16] of: dynamic: Add __of_node_dupv()

[Laurent Pinchart]

Hi Geert,

On Wednesday, 21 February 2018 12:26:45 EET Geert Uytterhoeven wrote:
> On Wed, Feb 21, 2018 at 12:10 AM, Laurent Pinchart wrote:
> > From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> > 
> > Add an __of_node_dupv() private method and make __of_node_dup() use it.
> > This is required for the subsequent changeset accessors which will
> > make use of it.
> > 
> > Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas@ideasonboard.com>
> > ---
> > 
> >  drivers/of/dynamic.c | 29 +++++++++++++++++++++++------
> >  1 file changed, 23 insertions(+), 6 deletions(-)
> > 
> > diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
> > index 7bb33d22b4e2..4ffd04925fdf 100644
> > --- a/drivers/of/dynamic.c
> > +++ b/drivers/of/dynamic.c
> > @@ -382,8 +382,9 @@ struct property *__of_prop_dup(const struct property
> > *prop, gfp_t allocflags)> 
> >  }
> >  
> >  /**
> > 
> > - * __of_node_dup() - Duplicate or create an empty device node
> > dynamically.
> > - * @fmt: Format string (plus vargs) for new full name of the device node
> > + * __of_node_dupv() - Duplicate or create an empty device node
> > dynamically. + * @fmt: Format string for new full name of the device node
> > + * @vargs: va_list containing the arugments for the node full name
> > 
> >   *
> >   * Create an device tree node, either by duplicating an empty node or by
> >   allocating * an empty one suitable for further modification.  The node
> >   data are> 
> > @@ -391,17 +392,15 @@ struct property *__of_prop_dup(const struct property
> > *prop, gfp_t allocflags)> 
> >   * OF_DETACHED bits set. Returns the newly allocated node or NULL on out
> >   of
> >   * memory error.
> >   */
> > 
> > -struct device_node *__of_node_dup(const struct device_node *np, const
> > char *fmt, ...) +struct device_node *__of_node_dupv(const struct
> > device_node *np,
> 
> static, cfr.
> https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git/co
> mmit/?h=topic/overlays&id=c45324e1807dd708344c9a478b777b68aca11cdf

I'll fix that in the next version.

-- 
Regards,

Laurent Pinchart

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Re: [PATCH v4 04/16] of: changesets: Introduce changeset helper methods

[Laurent Pinchart]

Hi Geert,

On Wednesday, 21 February 2018 12:21:50 EET Geert Uytterhoeven wrote:
> On Wed, Feb 21, 2018 at 12:10 AM, Laurent Pinchart wrote:
> > From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> > 
> > Changesets are very powerful, but the lack of a helper API
> > makes using them cumbersome. Introduce a simple copy based
> > API that makes things considerably easier.
> > 
> > To wit, adding a property using the raw API.
> > 
> >         struct property *prop;
> >         prop = kzalloc(sizeof(*prop)), GFP_KERNEL);
> >         prop->name = kstrdup("compatible");
> >         prop->value = kstrdup("foo,bar");
> >         prop->length = strlen(prop->value) + 1;
> >         of_changeset_add_property(ocs, np, prop);
> > 
> > while using the helper API
> > 
> >         of_changeset_add_property_string(ocs, np, "compatible",
> >         
> >                         "foo,bar");
> > 
> > Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> > [Fixed memory leak in __of_changeset_add_update_property_copy()]
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas@ideasonboard.com>
> 
> You missed one fix I have in my topic/overlays branch
> https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git/co
> mmit/?h=topic/overlays&id=150f95b9dec77ce371c229f7ac4d6dd8620bef4a
> > --- a/include/linux/of.h
> > +++ b/include/linux/of.h
> > 
> > +/**
> > + * of_changeset_add_property_u32 - Create a new u32 property
> > + *
> > + * @ocs:       changeset pointer
> > + * @np:                device node pointer
> > + * @name:      name of the property
> > + * @val:       value in host endian format
> > + *
> > + * Adds a u32 property to the changeset.
> > + *
> > + * Returns zero on success, a negative error value otherwise.
> > + */
> > +static inline int of_changeset_add_property_u32(struct of_changeset *ocs,
> > +               struct device_node *np, const char *name, u32 val)
> > +{
> > +       val = cpu_to_be32(val);
> 
> You must use an intermediate, to avoid complaints from sparse:
> 
>     __be32 x = cpu_to_be32(val);
> 
> > +       return __of_changeset_add_update_property_copy(ocs, np, name,
> > &val,
> > +                       sizeof(val), false);
> 
> s/val/x/

I'll fix both in the next version, thanks.

> > +}
> > +
> > +/**
> > + * of_changeset_update_property_u32 - Update u32 property
> > + *
> > + * @ocs:       changeset pointer
> > + * @np:                device node pointer
> > + * @name:      name of the property
> > + * @val:       value in host endian format
> > + *
> > + * Updates a u32 property to the changeset.
> > + *
> > + * Returns zero on success, a negative error value otherwise.
> > + */
> > +static inline int of_changeset_update_property_u32(
> > +       struct of_changeset *ocs, struct device_node *np,
> > +       const char *name, u32 val)
> > +{
> > +       val = cpu_to_be32(val);
> 
> Oh, a new one.
> 
> > +       return __of_changeset_add_update_property_copy(ocs, np, name,
> > &val,
> > +                       sizeof(val), true);
> > +}

-- 
Regards,

Laurent Pinchart

Re: [PATCH v4 04/16] of: changesets: Introduce changeset helper methods

[Laurent Pinchart]

Hi Geert,

On Wednesday, 21 February 2018 12:21:50 EET Geert Uytterhoeven wrote:
> On Wed, Feb 21, 2018 at 12:10 AM, Laurent Pinchart wrote:
> > From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> > 
> > Changesets are very powerful, but the lack of a helper API
> > makes using them cumbersome. Introduce a simple copy based
> > API that makes things considerably easier.
> > 
> > To wit, adding a property using the raw API.
> > 
> >         struct property *prop;
> >         prop = kzalloc(sizeof(*prop)), GFP_KERNEL);
> >         prop->name = kstrdup("compatible");
> >         prop->value = kstrdup("foo,bar");
> >         prop->length = strlen(prop->value) + 1;
> >         of_changeset_add_property(ocs, np, prop);
> > 
> > while using the helper API
> > 
> >         of_changeset_add_property_string(ocs, np, "compatible",
> >         
> >                         "foo,bar");
> > 
> > Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> > [Fixed memory leak in __of_changeset_add_update_property_copy()]
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas@ideasonboard.com>
> 
> You missed one fix I have in my topic/overlays branch
> https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git/co
> mmit/?h=topic/overlays&id=150f95b9dec77ce371c229f7ac4d6dd8620bef4a
> > --- a/include/linux/of.h
> > +++ b/include/linux/of.h
> > 
> > +/**
> > + * of_changeset_add_property_u32 - Create a new u32 property
> > + *
> > + * @ocs:       changeset pointer
> > + * @np:                device node pointer
> > + * @name:      name of the property
> > + * @val:       value in host endian format
> > + *
> > + * Adds a u32 property to the changeset.
> > + *
> > + * Returns zero on success, a negative error value otherwise.
> > + */
> > +static inline int of_changeset_add_property_u32(struct of_changeset *ocs,
> > +               struct device_node *np, const char *name, u32 val)
> > +{
> > +       val = cpu_to_be32(val);
> 
> You must use an intermediate, to avoid complaints from sparse:
> 
>     __be32 x = cpu_to_be32(val);
> 
> > +       return __of_changeset_add_update_property_copy(ocs, np, name,
> > &val,
> > +                       sizeof(val), false);
> 
> s/val/x/

I'll fix both in the next version, thanks.

> > +}
> > +
> > +/**
> > + * of_changeset_update_property_u32 - Update u32 property
> > + *
> > + * @ocs:       changeset pointer
> > + * @np:                device node pointer
> > + * @name:      name of the property
> > + * @val:       value in host endian format
> > + *
> > + * Updates a u32 property to the changeset.
> > + *
> > + * Returns zero on success, a negative error value otherwise.
> > + */
> > +static inline int of_changeset_update_property_u32(
> > +       struct of_changeset *ocs, struct device_node *np,
> > +       const char *name, u32 val)
> > +{
> > +       val = cpu_to_be32(val);
> 
> Oh, a new one.
> 
> > +       return __of_changeset_add_update_property_copy(ocs, np, name,
> > &val,
> > +                       sizeof(val), true);
> > +}

-- 
Regards,

Laurent Pinchart

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Re: [PATCH v4 04/16] of: changesets: Introduce changeset helper methods

[Rob Herring]

On Wed, Feb 21, 2018 at 4:21 AM, Geert Uytterhoeven
<geert@linux-m68k.org> wrote:
> Hi Laurent,
>
> On Wed, Feb 21, 2018 at 12:10 AM, Laurent Pinchart
> <laurent.pinchart+renesas@ideasonboard.com> wrote:
>> From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>>
>> Changesets are very powerful, but the lack of a helper API
>> makes using them cumbersome. Introduce a simple copy based
>> API that makes things considerably easier.
>>
>> To wit, adding a property using the raw API.
>>
>>         struct property *prop;
>>         prop = kzalloc(sizeof(*prop)), GFP_KERNEL);
>>         prop->name = kstrdup("compatible");
>>         prop->value = kstrdup("foo,bar");
>>         prop->length = strlen(prop->value) + 1;
>>         of_changeset_add_property(ocs, np, prop);
>>
>> while using the helper API
>>
>>         of_changeset_add_property_string(ocs, np, "compatible",
>>                         "foo,bar");
>>
>> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>> [Fixed memory leak in __of_changeset_add_update_property_copy()]
>> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
>
> You missed one fix I have in my topic/overlays branch
> https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git/commit/?h=topic/overlays&id=150f95b9dec77ce371c229f7ac4d6dd8620bef4a

Are you planning to try to upstream all this? If not, I'll get Frank
to keep changing the overlay API to make carrying it out of tree more
painful. :)

Rob

Re: [PATCH v4 04/16] of: changesets: Introduce changeset helper methods

[Rob Herring]

On Wed, Feb 21, 2018 at 4:21 AM, Geert Uytterhoeven
<geert@linux-m68k.org> wrote:
> Hi Laurent,
>
> On Wed, Feb 21, 2018 at 12:10 AM, Laurent Pinchart
> <laurent.pinchart+renesas@ideasonboard.com> wrote:
>> From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>>
>> Changesets are very powerful, but the lack of a helper API
>> makes using them cumbersome. Introduce a simple copy based
>> API that makes things considerably easier.
>>
>> To wit, adding a property using the raw API.
>>
>>         struct property *prop;
>>         prop = kzalloc(sizeof(*prop)), GFP_KERNEL);
>>         prop->name = kstrdup("compatible");
>>         prop->value = kstrdup("foo,bar");
>>         prop->length = strlen(prop->value) + 1;
>>         of_changeset_add_property(ocs, np, prop);
>>
>> while using the helper API
>>
>>         of_changeset_add_property_string(ocs, np, "compatible",
>>                         "foo,bar");
>>
>> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>> [Fixed memory leak in __of_changeset_add_update_property_copy()]
>> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
>
> You missed one fix I have in my topic/overlays branch
> https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git/commit/?h=topic/overlays&id=150f95b9dec77ce371c229f7ac4d6dd8620bef4a

Are you planning to try to upstream all this? If not, I'll get Frank
to keep changing the overlay API to make carrying it out of tree more
painful. :)

Rob
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Re: [PATCH v4 04/16] of: changesets: Introduce changeset helper methods

[Geert Uytterhoeven]

Hi Rob,

On Wed, Feb 21, 2018 at 4:23 PM, Rob Herring <robh@kernel.org> wrote:
> On Wed, Feb 21, 2018 at 4:21 AM, Geert Uytterhoeven
> <geert@linux-m68k.org> wrote:
>> You missed one fix I have in my topic/overlays branch
>> https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git/commit/?h=topic/overlays&id=150f95b9dec77ce371c229f7ac4d6dd8620bef4a
>
> Are you planning to try to upstream all this? If not, I'll get Frank

Not really. But I do need a way to load DT overlays at runtime, for testing
hardware on expansion connectors.

> to keep changing the overlay API to make carrying it out of tree more
> painful. :)

He already did a very good job w.r.t. that in v4.15-rc1 ;^)

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH v4 04/16] of: changesets: Introduce changeset helper methods

[Geert Uytterhoeven]

Hi Rob,

On Wed, Feb 21, 2018 at 4:23 PM, Rob Herring <robh@kernel.org> wrote:
> On Wed, Feb 21, 2018 at 4:21 AM, Geert Uytterhoeven
> <geert@linux-m68k.org> wrote:
>> You missed one fix I have in my topic/overlays branch
>> https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git/commit/?h=topic/overlays&id=150f95b9dec77ce371c229f7ac4d6dd8620bef4a
>
> Are you planning to try to upstream all this? If not, I'll get Frank

Not really. But I do need a way to load DT overlays at runtime, for testing
hardware on expansion connectors.

> to keep changing the overlay API to make carrying it out of tree more
> painful. :)

He already did a very good job w.r.t. that in v4.15-rc1 ;^)

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Simon Horman]

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

...

Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Simon Horman]

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

...
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Re: [PATCH v4 01/16] dt-bindings: display: renesas: Add R-Car LVDS encoder DT bindings

[Laurent Pinchart]

Hi Sergei,

On Wednesday, 21 February 2018 10:35:13 EET Sergei Shtylyov wrote:
> On 2/21/2018 2:10 AM, Laurent Pinchart wrote:
> > The Renesas R-Car Gen2 and Gen3 SoCs have internal LVDS encoders. Add
> > corresponding device tree bindings.
> > 
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas@ideasonboard.com>
> > Reviewed-by: Rob Herring <robh@kernel.org>
> > ---
> > Changes since v1:
> > 
> > - Move the SoC name before the IP name in compatible strings
> > - Rename parallel input to parallel RGB input
> > - Fixed "renesas,r8a7743-lvds" description
> > - Document the resets property
> > - Fixed typo
> > ---
> > 
> >   .../bindings/display/bridge/renesas,lvds.txt       | 56 ++++++++++++++++
> >   MAINTAINERS                                        |  1 +
> >   2 files changed, 57 insertions(+)
> >   create mode 100644
> >   Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt> 
> > diff --git
> > a/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
> > b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt new
> > file mode 100644
> > index 000000000000..2b19ce51ec07
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
> > @@ -0,0 +1,56 @@
> > +Renesas R-Car LVDS Encoder
> > +==========================
> > +
> > +These DT bindings describe the LVDS encoder embedded in the Renesas R-Car
> > +Gen2, R-Car Gen3 and RZ/G SoCs.
> > +
> > +Required properties:
> > +
> > +- compatible : Shall contain one of
> > +  - "renesas,r8a7743-lvds" for R8A7743 (RZ/G1M) compatible LVDS encoders
> > +  - "renesas,r8a7790-lvds" for R8A7790 (R-Car H2) compatible LVDS
> > encoders
> > +  - "renesas,r8a7791-lvds" for R8A7791 (R-Car M2-W) compatible LVDS
> > encoders +  - "renesas,r8a7793-lvds" for R8A7791 (R-Car M2-N) compatible
> > LVDS encoders +  - "renesas,r8a7795-lvds" for R8A7795 (R-Car H3)
> > compatible LVDS encoders +  - "renesas,r8a7796-lvds" for R8A7796 (R-Car
> > M3-W) compatible LVDS encoders +
> > +- reg: Base address and length for the memory-mapped registers
> > +- clocks: A phandle + clock-specifier pair for the functional clock
> > +- resets: A phandle + reset specifier for the module reset
> > +
> > +Required nodes:
> > +
> > +The LVDS encoder has two video ports. Their connections are modelled
> > using the +OF graph bindings specified in
> > Documentation/devicetree/bindings/graph.txt. +
> > +- Video port 0 corresponds to the parallel RGB input
> > +- Video port 1 corresponds to the LVDS output
> > +
> > +Each port shall have a single endpoint.
> > +
> > +
> > +Example:
> > +
> > +	lvds0: lvds@feb90000 {
> 
> "lvds-encoder@feb90000" maybe?

Or just "encoder@feb90000" ? Or "display-encoder@feb90000" ? Rob, any 
preference ?

> And do we need a # in the label if the encoder is alone in DT anyway?

As a matter of fact r8a7790, on which this example is based, has two LVDS 
encoders. I've only included one in the example as adding a second one 
wouldn't have added any value.

> [...]

-- 
Regards,

Laurent Pinchart

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Re: [PATCH v4 01/16] dt-bindings: display: renesas: Add R-Car LVDS encoder DT bindings

[Laurent Pinchart]

Hi Sergei,

On Wednesday, 21 February 2018 10:35:13 EET Sergei Shtylyov wrote:
> On 2/21/2018 2:10 AM, Laurent Pinchart wrote:
> > The Renesas R-Car Gen2 and Gen3 SoCs have internal LVDS encoders. Add
> > corresponding device tree bindings.
> > 
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas@ideasonboard.com>
> > Reviewed-by: Rob Herring <robh@kernel.org>
> > ---
> > Changes since v1:
> > 
> > - Move the SoC name before the IP name in compatible strings
> > - Rename parallel input to parallel RGB input
> > - Fixed "renesas,r8a7743-lvds" description
> > - Document the resets property
> > - Fixed typo
> > ---
> > 
> >   .../bindings/display/bridge/renesas,lvds.txt       | 56 ++++++++++++++++
> >   MAINTAINERS                                        |  1 +
> >   2 files changed, 57 insertions(+)
> >   create mode 100644
> >   Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt> 
> > diff --git
> > a/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
> > b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt new
> > file mode 100644
> > index 000000000000..2b19ce51ec07
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
> > @@ -0,0 +1,56 @@
> > +Renesas R-Car LVDS Encoder
> > +==========================
> > +
> > +These DT bindings describe the LVDS encoder embedded in the Renesas R-Car
> > +Gen2, R-Car Gen3 and RZ/G SoCs.
> > +
> > +Required properties:
> > +
> > +- compatible : Shall contain one of
> > +  - "renesas,r8a7743-lvds" for R8A7743 (RZ/G1M) compatible LVDS encoders
> > +  - "renesas,r8a7790-lvds" for R8A7790 (R-Car H2) compatible LVDS
> > encoders
> > +  - "renesas,r8a7791-lvds" for R8A7791 (R-Car M2-W) compatible LVDS
> > encoders +  - "renesas,r8a7793-lvds" for R8A7791 (R-Car M2-N) compatible
> > LVDS encoders +  - "renesas,r8a7795-lvds" for R8A7795 (R-Car H3)
> > compatible LVDS encoders +  - "renesas,r8a7796-lvds" for R8A7796 (R-Car
> > M3-W) compatible LVDS encoders +
> > +- reg: Base address and length for the memory-mapped registers
> > +- clocks: A phandle + clock-specifier pair for the functional clock
> > +- resets: A phandle + reset specifier for the module reset
> > +
> > +Required nodes:
> > +
> > +The LVDS encoder has two video ports. Their connections are modelled
> > using the +OF graph bindings specified in
> > Documentation/devicetree/bindings/graph.txt. +
> > +- Video port 0 corresponds to the parallel RGB input
> > +- Video port 1 corresponds to the LVDS output
> > +
> > +Each port shall have a single endpoint.
> > +
> > +
> > +Example:
> > +
> > +	lvds0: lvds@feb90000 {
> 
> "lvds-encoder@feb90000" maybe?

Or just "encoder@feb90000" ? Or "display-encoder@feb90000" ? Rob, any 
preference ?

> And do we need a # in the label if the encoder is alone in DT anyway?

As a matter of fact r8a7790, on which this example is based, has two LVDS 
encoders. I've only included one in the example as adding a second one 
wouldn't have added any value.

> [...]

-- 
Regards,

Laurent Pinchart

Re: [PATCH v4 06/16] of: unittest: changeset helpers

[Rob Herring]

On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart
<laurent.pinchart+renesas@ideasonboard.com> wrote:
> From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>
> Add a unitest specific for the new changeset helpers.
>
> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
>  drivers/of/unittest.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 54 insertions(+)
>
> diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
> index 7a9abaae874d..1b21d2c549a8 100644
> --- a/drivers/of/unittest.c
> +++ b/drivers/of/unittest.c
> @@ -609,6 +609,59 @@ static void __init of_unittest_changeset(void)
>  #endif
>  }
>
> +static void __init of_unittest_changeset_helper(void)
> +{
> +#ifdef CONFIG_OF_DYNAMIC

I think this can be:

if (!IS_ENABLED(CONFIG_OF_DYNAMIC))
  return;

Otherwise,

Reviewed-by: Rob Herring <robh@kernel.org>

Re: [PATCH v4 06/16] of: unittest: changeset helpers

[Rob Herring]

On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart
<laurent.pinchart+renesas@ideasonboard.com> wrote:
> From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>
> Add a unitest specific for the new changeset helpers.
>
> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
>  drivers/of/unittest.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 54 insertions(+)
>
> diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
> index 7a9abaae874d..1b21d2c549a8 100644
> --- a/drivers/of/unittest.c
> +++ b/drivers/of/unittest.c
> @@ -609,6 +609,59 @@ static void __init of_unittest_changeset(void)
>  #endif
>  }
>
> +static void __init of_unittest_changeset_helper(void)
> +{
> +#ifdef CONFIG_OF_DYNAMIC

I think this can be:

if (!IS_ENABLED(CONFIG_OF_DYNAMIC))
  return;

Otherwise,

Reviewed-by: Rob Herring <robh@kernel.org>
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Re: [PATCH v4 04/16] of: changesets: Introduce changeset helper methods

[Rob Herring]

On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart
<laurent.pinchart+renesas@ideasonboard.com> wrote:
> From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>
> Changesets are very powerful, but the lack of a helper API
> makes using them cumbersome. Introduce a simple copy based
> API that makes things considerably easier.
>
> To wit, adding a property using the raw API.
>
>         struct property *prop;
>         prop = kzalloc(sizeof(*prop)), GFP_KERNEL);
>         prop->name = kstrdup("compatible");
>         prop->value = kstrdup("foo,bar");
>         prop->length = strlen(prop->value) + 1;
>         of_changeset_add_property(ocs, np, prop);
>
> while using the helper API
>
>         of_changeset_add_property_string(ocs, np, "compatible",
>                         "foo,bar");
>
> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> [Fixed memory leak in __of_changeset_add_update_property_copy()]
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
>  drivers/of/dynamic.c | 222 ++++++++++++++++++++++++++++++++++
>  include/linux/of.h   | 328 +++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 550 insertions(+)

Other than what Geert pointed out,

Reviewed-by: Rob Herring <robh@kernel.org>

Re: [PATCH v4 04/16] of: changesets: Introduce changeset helper methods

[Rob Herring]

On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart
<laurent.pinchart+renesas@ideasonboard.com> wrote:
> From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>
> Changesets are very powerful, but the lack of a helper API
> makes using them cumbersome. Introduce a simple copy based
> API that makes things considerably easier.
>
> To wit, adding a property using the raw API.
>
>         struct property *prop;
>         prop = kzalloc(sizeof(*prop)), GFP_KERNEL);
>         prop->name = kstrdup("compatible");
>         prop->value = kstrdup("foo,bar");
>         prop->length = strlen(prop->value) + 1;
>         of_changeset_add_property(ocs, np, prop);
>
> while using the helper API
>
>         of_changeset_add_property_string(ocs, np, "compatible",
>                         "foo,bar");
>
> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> [Fixed memory leak in __of_changeset_add_update_property_copy()]
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
>  drivers/of/dynamic.c | 222 ++++++++++++++++++++++++++++++++++
>  include/linux/of.h   | 328 +++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 550 insertions(+)

Other than what Geert pointed out,

Reviewed-by: Rob Herring <robh@kernel.org>
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Re: [PATCH v4 03/16] of: dynamic: Add __of_node_dupv()

[Rob Herring]

On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart
<laurent.pinchart+renesas@ideasonboard.com> wrote:
> From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>
> Add an __of_node_dupv() private method and make __of_node_dup() use it.
> This is required for the subsequent changeset accessors which will
> make use of it.
>
> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
>  drivers/of/dynamic.c | 29 +++++++++++++++++++++++------
>  1 file changed, 23 insertions(+), 6 deletions(-)

Reviewed-by: Rob Herring <robh@kernel.org>

Re: [PATCH v4 03/16] of: dynamic: Add __of_node_dupv()

[Rob Herring]

On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart
<laurent.pinchart+renesas@ideasonboard.com> wrote:
> From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>
> Add an __of_node_dupv() private method and make __of_node_dup() use it.
> This is required for the subsequent changeset accessors which will
> make use of it.
>
> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
>  drivers/of/dynamic.c | 29 +++++++++++++++++++++++------
>  1 file changed, 23 insertions(+), 6 deletions(-)

Reviewed-by: Rob Herring <robh@kernel.org>
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Re: [PATCH v4 05/16] of: changeset: Add of_changeset_node_move method

[Rob Herring]

On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart
<laurent.pinchart+renesas@ideasonboard.com> wrote:
> From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>
> Adds a changeset helper for moving a subtree to a different place
> in the running tree. This is useful in advances cases of dynamic
> device tree construction.

This one I'm not real clear on when we'd use this and we don't have
any user, so lets drop it for now.

Rob

Re: [PATCH v4 05/16] of: changeset: Add of_changeset_node_move method

[Rob Herring]

On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart
<laurent.pinchart+renesas@ideasonboard.com> wrote:
> From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>
> Adds a changeset helper for moving a subtree to a different place
> in the running tree. This is useful in advances cases of dynamic
> device tree construction.

This one I'm not real clear on when we'd use this and we don't have
any user, so lets drop it for now.

Rob
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Re: [PATCH v4 08/16] drm: rcar-du: Fix legacy DT to create LVDS encoder nodes

[Rob Herring]

On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart
<laurent.pinchart+renesas@ideasonboard.com> wrote:
> The internal LVDS encoders now have their own DT bindings. Before
> switching the driver infrastructure to those new bindings, implement
> backward-compatibility through live DT patching.
>
> Patching is disabled and will be enabled along with support for the new
> DT bindings in the DU driver.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---

[...]

> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts
> new file mode 100644
> index 000000000000..6ebb355b652a
> --- /dev/null
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts
> @@ -0,0 +1,81 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * rcar_du_of_lvds_r8a7790.dts - Legacy LVDS DT bindings conversion for R8A7790
> + *
> + * Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> + *
> + * Based on work from Jyri Sarha <jsarha@ti.com>
> + * Copyright (C) 2015 Texas Instruments
> + */
> +
> +#include <dt-bindings/clock/renesas-cpg-mssr.h>

Doesn't seem to be used in any of these.

Otherwise,

Reviewed-by: Rob Herring <robh@kernel.org>

> +
> +/dts-v1/;
> +/plugin/;
> +/ {
> +       fragment@0 {
> +               target-path = "/";
> +               __overlay__ {
> +                       #address-cells = <2>;
> +                       #size-cells = <2>;
> +
> +                       lvds@feb90000 {
> +                               compatible = "renesas,r8a7790-lvds";
> +                               reg = <0 0xfeb90000 0 0x1c>;
> +
> +                               ports {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +
> +                                       port@0 {
> +                                               reg = <0>;
> +                                               lvds0_input: endpoint {
> +                                               };
> +                                       };
> +                                       port@1 {
> +                                               reg = <1>;
> +                                               lvds0_out: endpoint {
> +                                               };
> +                                       };
> +                               };
> +                       };
> +
> +                       lvds@feb94000 {
> +                               compatible = "renesas,r8a7790-lvds";
> +                               reg = <0 0xfeb94000 0 0x1c>;
> +
> +                               ports {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +
> +                                       port@0 {
> +                                               reg = <0>;
> +                                               lvds1_input: endpoint {
> +                                               };
> +                                       };
> +                                       port@1 {
> +                                               reg = <1>;
> +                                               lvds1_out: endpoint {
> +                                               };
> +                                       };
> +                               };
> +                       };
> +               };
> +       };
> +
> +       fragment@1 {
> +               target-path = "/display@feb00000/ports";
> +               __overlay__ {
> +                       port@1 {
> +                               endpoint {
> +                                       remote-endpoint = <&lvds0_input>;
> +                               };
> +                       };
> +                       port@2 {
> +                               endpoint {
> +                                       remote-endpoint = <&lvds1_input>;
> +                               };
> +                       };
> +               };
> +       };
> +};
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Re: [PATCH v4 08/16] drm: rcar-du: Fix legacy DT to create LVDS encoder nodes

[Rob Herring]

On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart
<laurent.pinchart+renesas@ideasonboard.com> wrote:
> The internal LVDS encoders now have their own DT bindings. Before
> switching the driver infrastructure to those new bindings, implement
> backward-compatibility through live DT patching.
>
> Patching is disabled and will be enabled along with support for the new
> DT bindings in the DU driver.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---

[...]

> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts
> new file mode 100644
> index 000000000000..6ebb355b652a
> --- /dev/null
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts
> @@ -0,0 +1,81 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * rcar_du_of_lvds_r8a7790.dts - Legacy LVDS DT bindings conversion for R8A7790
> + *
> + * Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> + *
> + * Based on work from Jyri Sarha <jsarha@ti.com>
> + * Copyright (C) 2015 Texas Instruments
> + */
> +
> +#include <dt-bindings/clock/renesas-cpg-mssr.h>

Doesn't seem to be used in any of these.

Otherwise,

Reviewed-by: Rob Herring <robh@kernel.org>

> +
> +/dts-v1/;
> +/plugin/;
> +/ {
> +       fragment@0 {
> +               target-path = "/";
> +               __overlay__ {
> +                       #address-cells = <2>;
> +                       #size-cells = <2>;
> +
> +                       lvds@feb90000 {
> +                               compatible = "renesas,r8a7790-lvds";
> +                               reg = <0 0xfeb90000 0 0x1c>;
> +
> +                               ports {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +
> +                                       port@0 {
> +                                               reg = <0>;
> +                                               lvds0_input: endpoint {
> +                                               };
> +                                       };
> +                                       port@1 {
> +                                               reg = <1>;
> +                                               lvds0_out: endpoint {
> +                                               };
> +                                       };
> +                               };
> +                       };
> +
> +                       lvds@feb94000 {
> +                               compatible = "renesas,r8a7790-lvds";
> +                               reg = <0 0xfeb94000 0 0x1c>;
> +
> +                               ports {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +
> +                                       port@0 {
> +                                               reg = <0>;
> +                                               lvds1_input: endpoint {
> +                                               };
> +                                       };
> +                                       port@1 {
> +                                               reg = <1>;
> +                                               lvds1_out: endpoint {
> +                                               };
> +                                       };
> +                               };
> +                       };
> +               };
> +       };
> +
> +       fragment@1 {
> +               target-path = "/display@feb00000/ports";
> +               __overlay__ {
> +                       port@1 {
> +                               endpoint {
> +                                       remote-endpoint = <&lvds0_input>;
> +                               };
> +                       };
> +                       port@2 {
> +                               endpoint {
> +                                       remote-endpoint = <&lvds1_input>;
> +                               };
> +                       };
> +               };
> +       };
> +};

Re: [PATCH v4 06/16] of: unittest: changeset helpers

[Laurent Pinchart]

Hi Rob,

On Thursday, 22 February 2018 01:10:25 EET Rob Herring wrote:
> On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart wrote:
> > From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> > 
> > Add a unitest specific for the new changeset helpers.
> > 
> > Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas@ideasonboard.com>
> > ---
> > 
> >  drivers/of/unittest.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++
> >  1 file changed, 54 insertions(+)
> > 
> > diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
> > index 7a9abaae874d..1b21d2c549a8 100644
> > --- a/drivers/of/unittest.c
> > +++ b/drivers/of/unittest.c
> > @@ -609,6 +609,59 @@ static void __init of_unittest_changeset(void)
> > 
> >  #endif
> >  }
> > 
> > +static void __init of_unittest_changeset_helper(void)
> > +{
> > +#ifdef CONFIG_OF_DYNAMIC
> 
> I think this can be:
> 
> if (!IS_ENABLED(CONFIG_OF_DYNAMIC))
>   return;

Not quite, as there are functions used below (such as of_changeset_init()) 
that are not defined if CONFIG_OF_DYNAMIC isn't enabled. We could create stubs 
in that case but I believe that's out of scope for this patch series.

> Otherwise,
> 
> Reviewed-by: Rob Herring <robh@kernel.org>

-- 
Regards,

Laurent Pinchart

Re: [PATCH v4 06/16] of: unittest: changeset helpers

[Laurent Pinchart]

Hi Rob,

On Thursday, 22 February 2018 01:10:25 EET Rob Herring wrote:
> On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart wrote:
> > From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> > 
> > Add a unitest specific for the new changeset helpers.
> > 
> > Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas@ideasonboard.com>
> > ---
> > 
> >  drivers/of/unittest.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++
> >  1 file changed, 54 insertions(+)
> > 
> > diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
> > index 7a9abaae874d..1b21d2c549a8 100644
> > --- a/drivers/of/unittest.c
> > +++ b/drivers/of/unittest.c
> > @@ -609,6 +609,59 @@ static void __init of_unittest_changeset(void)
> > 
> >  #endif
> >  }
> > 
> > +static void __init of_unittest_changeset_helper(void)
> > +{
> > +#ifdef CONFIG_OF_DYNAMIC
> 
> I think this can be:
> 
> if (!IS_ENABLED(CONFIG_OF_DYNAMIC))
>   return;

Not quite, as there are functions used below (such as of_changeset_init()) 
that are not defined if CONFIG_OF_DYNAMIC isn't enabled. We could create stubs 
in that case but I believe that's out of scope for this patch series.

> Otherwise,
> 
> Reviewed-by: Rob Herring <robh@kernel.org>

-- 
Regards,

Laurent Pinchart

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Re: [PATCH v4 05/16] of: changeset: Add of_changeset_node_move method

[Laurent Pinchart]

Hi Rob,

On Thursday, 22 February 2018 01:20:36 EET Rob Herring wrote:
> On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart wrote:
> > From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> > 
> > Adds a changeset helper for moving a subtree to a different place
> > in the running tree. This is useful in advances cases of dynamic
> > device tree construction.
> 
> This one I'm not real clear on when we'd use this and we don't have
> any user, so lets drop it for now.

OK, no problem.

-- 
Regards,

Laurent Pinchart

Re: [PATCH v4 05/16] of: changeset: Add of_changeset_node_move method

[Laurent Pinchart]

Hi Rob,

On Thursday, 22 February 2018 01:20:36 EET Rob Herring wrote:
> On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart wrote:
> > From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> > 
> > Adds a changeset helper for moving a subtree to a different place
> > in the running tree. This is useful in advances cases of dynamic
> > device tree construction.
> 
> This one I'm not real clear on when we'd use this and we don't have
> any user, so lets drop it for now.

OK, no problem.

-- 
Regards,

Laurent Pinchart

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Re: [PATCH v4 06/16] of: unittest: changeset helpers

[Rob Herring]

On Wed, Feb 21, 2018 at 5:39 PM, Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
> Hi Rob,
>
> On Thursday, 22 February 2018 01:10:25 EET Rob Herring wrote:
>> On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart wrote:
>> > From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>> >
>> > Add a unitest specific for the new changeset helpers.
>> >
>> > Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>> > Signed-off-by: Laurent Pinchart
>> > <laurent.pinchart+renesas@ideasonboard.com>
>> > ---
>> >
>> >  drivers/of/unittest.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++
>> >  1 file changed, 54 insertions(+)
>> >
>> > diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
>> > index 7a9abaae874d..1b21d2c549a8 100644
>> > --- a/drivers/of/unittest.c
>> > +++ b/drivers/of/unittest.c
>> > @@ -609,6 +609,59 @@ static void __init of_unittest_changeset(void)
>> >
>> >  #endif
>> >  }
>> >
>> > +static void __init of_unittest_changeset_helper(void)
>> > +{
>> > +#ifdef CONFIG_OF_DYNAMIC
>>
>> I think this can be:
>>
>> if (!IS_ENABLED(CONFIG_OF_DYNAMIC))
>>   return;
>
> Not quite, as there are functions used below (such as of_changeset_init())
> that are not defined if CONFIG_OF_DYNAMIC isn't enabled. We could create stubs
> in that case but I believe that's out of scope for this patch series.

Okay. I thought we had the necessary stubs, but didn't check too closely.

>
>> Otherwise,
>>
>> Reviewed-by: Rob Herring <robh@kernel.org>
>
> --
> Regards,
>
> Laurent Pinchart
>

Re: [PATCH v4 06/16] of: unittest: changeset helpers

[Rob Herring]

On Wed, Feb 21, 2018 at 5:39 PM, Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
> Hi Rob,
>
> On Thursday, 22 February 2018 01:10:25 EET Rob Herring wrote:
>> On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart wrote:
>> > From: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>> >
>> > Add a unitest specific for the new changeset helpers.
>> >
>> > Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>> > Signed-off-by: Laurent Pinchart
>> > <laurent.pinchart+renesas@ideasonboard.com>
>> > ---
>> >
>> >  drivers/of/unittest.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++
>> >  1 file changed, 54 insertions(+)
>> >
>> > diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
>> > index 7a9abaae874d..1b21d2c549a8 100644
>> > --- a/drivers/of/unittest.c
>> > +++ b/drivers/of/unittest.c
>> > @@ -609,6 +609,59 @@ static void __init of_unittest_changeset(void)
>> >
>> >  #endif
>> >  }
>> >
>> > +static void __init of_unittest_changeset_helper(void)
>> > +{
>> > +#ifdef CONFIG_OF_DYNAMIC
>>
>> I think this can be:
>>
>> if (!IS_ENABLED(CONFIG_OF_DYNAMIC))
>>   return;
>
> Not quite, as there are functions used below (such as of_changeset_init())
> that are not defined if CONFIG_OF_DYNAMIC isn't enabled. We could create stubs
> in that case but I believe that's out of scope for this patch series.

Okay. I thought we had the necessary stubs, but didn't check too closely.

>
>> Otherwise,
>>
>> Reviewed-by: Rob Herring <robh@kernel.org>
>
> --
> Regards,
>
> Laurent Pinchart
>
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Re: [PATCH v4 08/16] drm: rcar-du: Fix legacy DT to create LVDS encoder nodes

[Laurent Pinchart]

Hi Rob,

On Thursday, 22 February 2018 01:28:48 EET Rob Herring wrote:
> On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart wrote:
> > The internal LVDS encoders now have their own DT bindings. Before
> > switching the driver infrastructure to those new bindings, implement
> > backward-compatibility through live DT patching.
> > 
> > Patching is disabled and will be enabled along with support for the new
> > DT bindings in the DU driver.
> > 
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas@ideasonboard.com>
> > ---
> 
> [...]
> 
> > diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts
> > b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts new file mode
> > 100644
> > index 000000000000..6ebb355b652a
> > --- /dev/null
> > +++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts
> > @@ -0,0 +1,81 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * rcar_du_of_lvds_r8a7790.dts - Legacy LVDS DT bindings conversion for
> > R8A7790
> > + *
> > + * Copyright (C) 2018 Laurent Pinchart
> > <laurent.pinchart@ideasonboard.com>
> > + *
> > + * Based on work from Jyri Sarha <jsarha@ti.com>
> > + * Copyright (C) 2015 Texas Instruments
> > + */
> > +
> > +#include <dt-bindings/clock/renesas-cpg-mssr.h>
> 
> Doesn't seem to be used in any of these.

It's a leftover from a previous test. I'll remove it in all the .dts files.

> Otherwise,
> 
> Reviewed-by: Rob Herring <robh@kernel.org>
> 
> > +
> > +/dts-v1/;
> > +/plugin/;
> > +/ {
> > +       fragment@0 {
> > +               target-path = "/";
> > +               __overlay__ {
> > +                       #address-cells = <2>;
> > +                       #size-cells = <2>;
> > +
> > +                       lvds@feb90000 {
> > +                               compatible = "renesas,r8a7790-lvds";
> > +                               reg = <0 0xfeb90000 0 0x1c>;
> > +
> > +                               ports {
> > +                                       #address-cells = <1>;
> > +                                       #size-cells = <0>;
> > +
> > +                                       port@0 {
> > +                                               reg = <0>;
> > +                                               lvds0_input: endpoint {
> > +                                               };
> > +                                       };
> > +                                       port@1 {
> > +                                               reg = <1>;
> > +                                               lvds0_out: endpoint {
> > +                                               };
> > +                                       };
> > +                               };
> > +                       };
> > +
> > +                       lvds@feb94000 {
> > +                               compatible = "renesas,r8a7790-lvds";
> > +                               reg = <0 0xfeb94000 0 0x1c>;
> > +
> > +                               ports {
> > +                                       #address-cells = <1>;
> > +                                       #size-cells = <0>;
> > +
> > +                                       port@0 {
> > +                                               reg = <0>;
> > +                                               lvds1_input: endpoint {
> > +                                               };
> > +                                       };
> > +                                       port@1 {
> > +                                               reg = <1>;
> > +                                               lvds1_out: endpoint {
> > +                                               };
> > +                                       };
> > +                               };
> > +                       };
> > +               };
> > +       };
> > +
> > +       fragment@1 {
> > +               target-path = "/display@feb00000/ports";
> > +               __overlay__ {
> > +                       port@1 {
> > +                               endpoint {
> > +                                       remote-endpoint = <&lvds0_input>;
> > +                               };
> > +                       };
> > +                       port@2 {
> > +                               endpoint {
> > +                                       remote-endpoint = <&lvds1_input>;
> > +                               };
> > +                       };
> > +               };
> > +       };
> > +};

-- 
Regards,

Laurent Pinchart

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Re: [PATCH v4 08/16] drm: rcar-du: Fix legacy DT to create LVDS encoder nodes

[Laurent Pinchart]

Hi Rob,

On Thursday, 22 February 2018 01:28:48 EET Rob Herring wrote:
> On Tue, Feb 20, 2018 at 5:10 PM, Laurent Pinchart wrote:
> > The internal LVDS encoders now have their own DT bindings. Before
> > switching the driver infrastructure to those new bindings, implement
> > backward-compatibility through live DT patching.
> > 
> > Patching is disabled and will be enabled along with support for the new
> > DT bindings in the DU driver.
> > 
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas@ideasonboard.com>
> > ---
> 
> [...]
> 
> > diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts
> > b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts new file mode
> > 100644
> > index 000000000000..6ebb355b652a
> > --- /dev/null
> > +++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts
> > @@ -0,0 +1,81 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * rcar_du_of_lvds_r8a7790.dts - Legacy LVDS DT bindings conversion for
> > R8A7790
> > + *
> > + * Copyright (C) 2018 Laurent Pinchart
> > <laurent.pinchart@ideasonboard.com>
> > + *
> > + * Based on work from Jyri Sarha <jsarha@ti.com>
> > + * Copyright (C) 2015 Texas Instruments
> > + */
> > +
> > +#include <dt-bindings/clock/renesas-cpg-mssr.h>
> 
> Doesn't seem to be used in any of these.

It's a leftover from a previous test. I'll remove it in all the .dts files.

> Otherwise,
> 
> Reviewed-by: Rob Herring <robh@kernel.org>
> 
> > +
> > +/dts-v1/;
> > +/plugin/;
> > +/ {
> > +       fragment@0 {
> > +               target-path = "/";
> > +               __overlay__ {
> > +                       #address-cells = <2>;
> > +                       #size-cells = <2>;
> > +
> > +                       lvds@feb90000 {
> > +                               compatible = "renesas,r8a7790-lvds";
> > +                               reg = <0 0xfeb90000 0 0x1c>;
> > +
> > +                               ports {
> > +                                       #address-cells = <1>;
> > +                                       #size-cells = <0>;
> > +
> > +                                       port@0 {
> > +                                               reg = <0>;
> > +                                               lvds0_input: endpoint {
> > +                                               };
> > +                                       };
> > +                                       port@1 {
> > +                                               reg = <1>;
> > +                                               lvds0_out: endpoint {
> > +                                               };
> > +                                       };
> > +                               };
> > +                       };
> > +
> > +                       lvds@feb94000 {
> > +                               compatible = "renesas,r8a7790-lvds";
> > +                               reg = <0 0xfeb94000 0 0x1c>;
> > +
> > +                               ports {
> > +                                       #address-cells = <1>;
> > +                                       #size-cells = <0>;
> > +
> > +                                       port@0 {
> > +                                               reg = <0>;
> > +                                               lvds1_input: endpoint {
> > +                                               };
> > +                                       };
> > +                                       port@1 {
> > +                                               reg = <1>;
> > +                                               lvds1_out: endpoint {
> > +                                               };
> > +                                       };
> > +                               };
> > +                       };
> > +               };
> > +       };
> > +
> > +       fragment@1 {
> > +               target-path = "/display@feb00000/ports";
> > +               __overlay__ {
> > +                       port@1 {
> > +                               endpoint {
> > +                                       remote-endpoint = <&lvds0_input>;
> > +                               };
> > +                       };
> > +                       port@2 {
> > +                               endpoint {
> > +                                       remote-endpoint = <&lvds1_input>;
> > +                               };
> > +                       };
> > +               };
> > +       };
> > +};

-- 
Regards,

Laurent Pinchart

Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Frank Rowand]

On 02/20/18 15:10, 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.

Wait a minute!  Why are you putting a patch set to modify core devicetree
in the middle of a driver series.  Please pull it out to a separate series.

I'll try to look at the patches, as they are in this series, sometime
tomorrow.  I have a vague memory of unresolved issues from the last
time they were proposed.

Thanks,

Frank


> 
> 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
> 
> 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
> 
>  .../bindings/display/bridge/renesas,lvds.txt       |  56 +++
>  .../devicetree/bindings/display/renesas,du.txt     |  31 +-
>  MAINTAINERS                                        |   1 +
>  arch/arm/boot/dts/r8a7790-lager.dts                |  22 +-
>  arch/arm/boot/dts/r8a7790.dtsi                     |  64 ++-
>  arch/arm/boot/dts/r8a7791-koelsch.dts              |  10 +-
>  arch/arm/boot/dts/r8a7791-porter.dts               |  16 +-
>  arch/arm/boot/dts/r8a7791.dtsi                     |  36 +-
>  arch/arm/boot/dts/r8a7792.dtsi                     |   1 -
>  arch/arm/boot/dts/r8a7793-gose.dts                 |  10 +-
>  arch/arm/boot/dts/r8a7793.dtsi                     |  37 +-
>  arch/arm/boot/dts/r8a7794.dtsi                     |   1 -
>  .../boot/dts/renesas/r8a7795-es1-salvator-x.dts    |   3 +-
>  arch/arm64/boot/dts/renesas/r8a7795-h3ulcb.dts     |   3 +-
>  arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts |   3 +-
>  .../arm64/boot/dts/renesas/r8a7795-salvator-xs.dts |   3 +-
>  arch/arm64/boot/dts/renesas/r8a7795.dtsi           |  36 +-
>  arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts     |   3 +-
>  arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts |   3 +-
>  arch/arm64/boot/dts/renesas/r8a7796.dtsi           |  36 +-
>  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               | 307 ++++++++++++
>  drivers/gpu/drm/rcar-du/rcar_du_of.h               |  20 +
>  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts    |  81 ++++
>  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts    |  55 +++
>  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts    |  55 +++
>  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts    |  55 +++
>  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts    |  55 +++
>  drivers/gpu/drm/rcar-du/rcar_lvds.c                | 524 +++++++++++++++++++++
>  drivers/i2c/muxes/i2c-demux-pinctrl.c              |  12 +-
>  drivers/of/dynamic.c                               | 317 ++++++++++++-
>  drivers/of/unittest.c                              |  54 +++
>  include/linux/of.h                                 | 337 +++++++++++++
>  43 files changed, 2199 insertions(+), 710 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
> 

Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Frank Rowand]

On 02/20/18 15:10, 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.

Wait a minute!  Why are you putting a patch set to modify core devicetree
in the middle of a driver series.  Please pull it out to a separate series.

I'll try to look at the patches, as they are in this series, sometime
tomorrow.  I have a vague memory of unresolved issues from the last
time they were proposed.

Thanks,

Frank


> 
> 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
> 
> 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
> 
>  .../bindings/display/bridge/renesas,lvds.txt       |  56 +++
>  .../devicetree/bindings/display/renesas,du.txt     |  31 +-
>  MAINTAINERS                                        |   1 +
>  arch/arm/boot/dts/r8a7790-lager.dts                |  22 +-
>  arch/arm/boot/dts/r8a7790.dtsi                     |  64 ++-
>  arch/arm/boot/dts/r8a7791-koelsch.dts              |  10 +-
>  arch/arm/boot/dts/r8a7791-porter.dts               |  16 +-
>  arch/arm/boot/dts/r8a7791.dtsi                     |  36 +-
>  arch/arm/boot/dts/r8a7792.dtsi                     |   1 -
>  arch/arm/boot/dts/r8a7793-gose.dts                 |  10 +-
>  arch/arm/boot/dts/r8a7793.dtsi                     |  37 +-
>  arch/arm/boot/dts/r8a7794.dtsi                     |   1 -
>  .../boot/dts/renesas/r8a7795-es1-salvator-x.dts    |   3 +-
>  arch/arm64/boot/dts/renesas/r8a7795-h3ulcb.dts     |   3 +-
>  arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts |   3 +-
>  .../arm64/boot/dts/renesas/r8a7795-salvator-xs.dts |   3 +-
>  arch/arm64/boot/dts/renesas/r8a7795.dtsi           |  36 +-
>  arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts     |   3 +-
>  arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts |   3 +-
>  arch/arm64/boot/dts/renesas/r8a7796.dtsi           |  36 +-
>  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               | 307 ++++++++++++
>  drivers/gpu/drm/rcar-du/rcar_du_of.h               |  20 +
>  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts    |  81 ++++
>  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts    |  55 +++
>  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts    |  55 +++
>  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts    |  55 +++
>  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts    |  55 +++
>  drivers/gpu/drm/rcar-du/rcar_lvds.c                | 524 +++++++++++++++++++++
>  drivers/i2c/muxes/i2c-demux-pinctrl.c              |  12 +-
>  drivers/of/dynamic.c                               | 317 ++++++++++++-
>  drivers/of/unittest.c                              |  54 +++
>  include/linux/of.h                                 | 337 +++++++++++++
>  43 files changed, 2199 insertions(+), 710 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
> 

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Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Laurent Pinchart]

Hi Frank,

On Thursday, 22 February 2018 08:07:14 EET Frank Rowand wrote:
> On 02/20/18 15:10, 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.
> 
> Wait a minute!  Why are you putting a patch set to modify core devicetree
> in the middle of a driver series.  Please pull it out to a separate series.

Because Rob asked for the driver-local implementation of the property add 
function to be replaced by Pantelis' series. I want to get the LVDS changes in 
v4.17 and asked Rob whether I could then take the OF changeset patches merged 
through the DRM tree, and he didn't object. If that causes an issue I'll 
switch back to the driver-local implementation to get the driver changes 
merged, split the OF changeset series out, and then move to the OF changeset 
API once merged. Would you prefer that ?

> I'll try to look at the patches, as they are in this series, sometime
> tomorrow.  I have a vague memory of unresolved issues from the last
> time they were proposed.
> 
> > 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
> > 
> > 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
> >  
> >  .../bindings/display/bridge/renesas,lvds.txt       |  56 +++
> >  .../devicetree/bindings/display/renesas,du.txt     |  31 +-
> >  MAINTAINERS                                        |   1 +
> >  arch/arm/boot/dts/r8a7790-lager.dts                |  22 +-
> >  arch/arm/boot/dts/r8a7790.dtsi                     |  64 ++-
> >  arch/arm/boot/dts/r8a7791-koelsch.dts              |  10 +-
> >  arch/arm/boot/dts/r8a7791-porter.dts               |  16 +-
> >  arch/arm/boot/dts/r8a7791.dtsi                     |  36 +-
> >  arch/arm/boot/dts/r8a7792.dtsi                     |   1 -
> >  arch/arm/boot/dts/r8a7793-gose.dts                 |  10 +-
> >  arch/arm/boot/dts/r8a7793.dtsi                     |  37 +-
> >  arch/arm/boot/dts/r8a7794.dtsi                     |   1 -
> >  .../boot/dts/renesas/r8a7795-es1-salvator-x.dts    |   3 +-
> >  arch/arm64/boot/dts/renesas/r8a7795-h3ulcb.dts     |   3 +-
> >  arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts |   3 +-
> >  .../arm64/boot/dts/renesas/r8a7795-salvator-xs.dts |   3 +-
> >  arch/arm64/boot/dts/renesas/r8a7795.dtsi           |  36 +-
> >  arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts     |   3 +-
> >  arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts |   3 +-
> >  arch/arm64/boot/dts/renesas/r8a7796.dtsi           |  36 +-
> >  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               | 307 ++++++++++++
> >  drivers/gpu/drm/rcar-du/rcar_du_of.h               |  20 +
> >  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts    |  81 ++++
> >  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts    |  55 +++
> >  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts    |  55 +++
> >  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts    |  55 +++
> >  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts    |  55 +++
> >  drivers/gpu/drm/rcar-du/rcar_lvds.c                | 524 ++++++++++++++++
> >  drivers/i2c/muxes/i2c-demux-pinctrl.c              |  12 +-
> >  drivers/of/dynamic.c                               | 317 ++++++++++++-
> >  drivers/of/unittest.c                              |  54 +++
> >  include/linux/of.h                                 | 337 +++++++++++++
> >  43 files changed, 2199 insertions(+), 710 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

Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Laurent Pinchart]

Hi Frank,

On Thursday, 22 February 2018 08:07:14 EET Frank Rowand wrote:
> On 02/20/18 15:10, 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.
> 
> Wait a minute!  Why are you putting a patch set to modify core devicetree
> in the middle of a driver series.  Please pull it out to a separate series.

Because Rob asked for the driver-local implementation of the property add 
function to be replaced by Pantelis' series. I want to get the LVDS changes in 
v4.17 and asked Rob whether I could then take the OF changeset patches merged 
through the DRM tree, and he didn't object. If that causes an issue I'll 
switch back to the driver-local implementation to get the driver changes 
merged, split the OF changeset series out, and then move to the OF changeset 
API once merged. Would you prefer that ?

> I'll try to look at the patches, as they are in this series, sometime
> tomorrow.  I have a vague memory of unresolved issues from the last
> time they were proposed.
> 
> > 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
> > 
> > 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
> >  
> >  .../bindings/display/bridge/renesas,lvds.txt       |  56 +++
> >  .../devicetree/bindings/display/renesas,du.txt     |  31 +-
> >  MAINTAINERS                                        |   1 +
> >  arch/arm/boot/dts/r8a7790-lager.dts                |  22 +-
> >  arch/arm/boot/dts/r8a7790.dtsi                     |  64 ++-
> >  arch/arm/boot/dts/r8a7791-koelsch.dts              |  10 +-
> >  arch/arm/boot/dts/r8a7791-porter.dts               |  16 +-
> >  arch/arm/boot/dts/r8a7791.dtsi                     |  36 +-
> >  arch/arm/boot/dts/r8a7792.dtsi                     |   1 -
> >  arch/arm/boot/dts/r8a7793-gose.dts                 |  10 +-
> >  arch/arm/boot/dts/r8a7793.dtsi                     |  37 +-
> >  arch/arm/boot/dts/r8a7794.dtsi                     |   1 -
> >  .../boot/dts/renesas/r8a7795-es1-salvator-x.dts    |   3 +-
> >  arch/arm64/boot/dts/renesas/r8a7795-h3ulcb.dts     |   3 +-
> >  arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts |   3 +-
> >  .../arm64/boot/dts/renesas/r8a7795-salvator-xs.dts |   3 +-
> >  arch/arm64/boot/dts/renesas/r8a7795.dtsi           |  36 +-
> >  arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts     |   3 +-
> >  arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts |   3 +-
> >  arch/arm64/boot/dts/renesas/r8a7796.dtsi           |  36 +-
> >  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               | 307 ++++++++++++
> >  drivers/gpu/drm/rcar-du/rcar_du_of.h               |  20 +
> >  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts    |  81 ++++
> >  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts    |  55 +++
> >  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts    |  55 +++
> >  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts    |  55 +++
> >  .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts    |  55 +++
> >  drivers/gpu/drm/rcar-du/rcar_lvds.c                | 524 ++++++++++++++++
> >  drivers/i2c/muxes/i2c-demux-pinctrl.c              |  12 +-
> >  drivers/of/dynamic.c                               | 317 ++++++++++++-
> >  drivers/of/unittest.c                              |  54 +++
> >  include/linux/of.h                                 | 337 +++++++++++++
> >  43 files changed, 2199 insertions(+), 710 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

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dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Frank Rowand]

Hi Laurent,

On 02/22/18 02:25, Laurent Pinchart wrote:
> Hi Frank,
> 
> On Thursday, 22 February 2018 08:07:14 EET Frank Rowand wrote:
>> On 02/20/18 15:10, 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.
>>
>> Wait a minute!  Why are you putting a patch set to modify core devicetree
>> in the middle of a driver series.  Please pull it out to a separate series.
> 
> Because Rob asked for the driver-local implementation of the property add 
> function to be replaced by Pantelis' series. I want to get the LVDS changes in 
> v4.17 and asked Rob whether I could then take the OF changeset patches merged 
> through the DRM tree, and he didn't object. If that causes an issue I'll 
> switch back to the driver-local implementation to get the driver changes 
> merged, split the OF changeset series out, and then move to the OF changeset 
> API once merged. Would you prefer that ?

You have already created a new version of the R-Car patches without the
set of patches that I was objecting to here.  So this is somewhat just
an academic comment.

As I mentioned in the v6 thread, I am coming back here to clean up loose
ends, and explain why I had the reaction I had.  Basically, this is a
process issue to me.

(1) The patch set from Pantelis is "hidden" in the driver patch series.
When viewing collapsed threads (which is my normal mode to avoid getting
overwhelmed by the vast volume of email I scan), the Pantelis patch set
is totally invisible.  If the R-Car driver patch series had not had me
on the to: list, there is a very good chance I would not have noticed
it.  Or noticed in a more delayed time frame.  And the same applies to
anyone else who might be subscribed to the devicetree mail list.  If
the Pantelis patch series was split out into a separate patch set then
it would be more visible on the list.

(2) There is no good way to indicate in the email subject lines for
the Pantelis patches that they are version 3 of the series, since
they are also version 4 of the R-Car patch series.  If one reads the
patch 0/0 header carefully, and/or the other Pantelis patch comment
headers carefully, and then does a little detective work, it is
possible to find version 2 of the Pantelis patch series, and thus
be able to track the full history.  If just glancing at each
individual patch email subject, scanning the patch comment, and
spending more time reading the body of the patch, it would be
very easy to overlook the existence of the previous versions on
the mail list.

(2b) Small quibble:  if the Pantelis patches were in a separate series,
with v3 in the subject header, then you would have normally put
a "changes since v2" section in the patch comment header, which would
have been more visible and less cryptic than what you wrote, which was:

   ...

   Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
   [Fixed memory leak in __of_changeset_add_update_property_copy()]
   Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
   ---
    drivers/of/dynamic.c | 222 ++++++++++++++++++++++++++++++++++
    include/linux/of.h   | 328 +++++++++++++++++++++++++++++++++++++++++++++++++++
    2 files changed, 550 insertions(+)

My original scan of version 2 and then the email in this series had me
questioning whether the two open issues from patch 2 had been addressed
(yes, patch 0/16 did explicitly mention that 2 review comments had been
taken into account, so you can point at my poor reading comprehension).

(3) This is totally unrelated to your patch series, but I'm leaving a bread
crumb trail here.  Rob pointed you at a patch series that was not the most
recent version.  When this patch series appears again, there already is
a version 3 subset of it, but it is still labeled as being version 2, and
also has outstanding un-addressed issues.  ("[PATCH v2 1/2] of: dynamic:
Add __of_node_dupv()", 11/04/16)

-Frank

Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Frank Rowand]

Hi Laurent,

On 02/22/18 02:25, Laurent Pinchart wrote:
> Hi Frank,
> 
> On Thursday, 22 February 2018 08:07:14 EET Frank Rowand wrote:
>> On 02/20/18 15:10, 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.
>>
>> Wait a minute!  Why are you putting a patch set to modify core devicetree
>> in the middle of a driver series.  Please pull it out to a separate series.
> 
> Because Rob asked for the driver-local implementation of the property add 
> function to be replaced by Pantelis' series. I want to get the LVDS changes in 
> v4.17 and asked Rob whether I could then take the OF changeset patches merged 
> through the DRM tree, and he didn't object. If that causes an issue I'll 
> switch back to the driver-local implementation to get the driver changes 
> merged, split the OF changeset series out, and then move to the OF changeset 
> API once merged. Would you prefer that ?

You have already created a new version of the R-Car patches without the
set of patches that I was objecting to here.  So this is somewhat just
an academic comment.

As I mentioned in the v6 thread, I am coming back here to clean up loose
ends, and explain why I had the reaction I had.  Basically, this is a
process issue to me.

(1) The patch set from Pantelis is "hidden" in the driver patch series.
When viewing collapsed threads (which is my normal mode to avoid getting
overwhelmed by the vast volume of email I scan), the Pantelis patch set
is totally invisible.  If the R-Car driver patch series had not had me
on the to: list, there is a very good chance I would not have noticed
it.  Or noticed in a more delayed time frame.  And the same applies to
anyone else who might be subscribed to the devicetree mail list.  If
the Pantelis patch series was split out into a separate patch set then
it would be more visible on the list.

(2) There is no good way to indicate in the email subject lines for
the Pantelis patches that they are version 3 of the series, since
they are also version 4 of the R-Car patch series.  If one reads the
patch 0/0 header carefully, and/or the other Pantelis patch comment
headers carefully, and then does a little detective work, it is
possible to find version 2 of the Pantelis patch series, and thus
be able to track the full history.  If just glancing at each
individual patch email subject, scanning the patch comment, and
spending more time reading the body of the patch, it would be
very easy to overlook the existence of the previous versions on
the mail list.

(2b) Small quibble:  if the Pantelis patches were in a separate series,
with v3 in the subject header, then you would have normally put
a "changes since v2" section in the patch comment header, which would
have been more visible and less cryptic than what you wrote, which was:

   ...

   Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
   [Fixed memory leak in __of_changeset_add_update_property_copy()]
   Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
   ---
    drivers/of/dynamic.c | 222 ++++++++++++++++++++++++++++++++++
    include/linux/of.h   | 328 +++++++++++++++++++++++++++++++++++++++++++++++++++
    2 files changed, 550 insertions(+)

My original scan of version 2 and then the email in this series had me
questioning whether the two open issues from patch 2 had been addressed
(yes, patch 0/16 did explicitly mention that 2 review comments had been
taken into account, so you can point at my poor reading comprehension).

(3) This is totally unrelated to your patch series, but I'm leaving a bread
crumb trail here.  Rob pointed you at a patch series that was not the most
recent version.  When this patch series appears again, there already is
a version 3 subset of it, but it is still labeled as being version 2, and
also has outstanding un-addressed issues.  ("[PATCH v2 1/2] of: dynamic:
Add __of_node_dupv()", 11/04/16)

-Frank
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Laurent Pinchart]

Hi Frank,

On Friday, 23 February 2018 05:20:43 EET Frank Rowand wrote:
> On 02/22/18 02:25, Laurent Pinchart wrote:
> > On Thursday, 22 February 2018 08:07:14 EET Frank Rowand wrote:
> >> On 02/20/18 15:10, 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.
> >> 
> >> Wait a minute!  Why are you putting a patch set to modify core devicetree
> >> in the middle of a driver series.  Please pull it out to a separate
> >> series.
> > 
> > Because Rob asked for the driver-local implementation of the property add
> > function to be replaced by Pantelis' series. I want to get the LVDS
> > changes in v4.17 and asked Rob whether I could then take the OF changeset
> > patches merged through the DRM tree, and he didn't object. If that causes
> > an issue I'll switch back to the driver-local implementation to get the
> > driver changes merged, split the OF changeset series out, and then move
> > to the OF changeset API once merged. Would you prefer that ?
> 
> You have already created a new version of the R-Car patches without the
> set of patches that I was objecting to here.  So this is somewhat just
> an academic comment.
> 
> As I mentioned in the v6 thread, I am coming back here to clean up loose
> ends, and explain why I had the reaction I had.  Basically, this is a
> process issue to me.
> 
> (1) The patch set from Pantelis is "hidden" in the driver patch series.
> When viewing collapsed threads (which is my normal mode to avoid getting
> overwhelmed by the vast volume of email I scan), the Pantelis patch set
> is totally invisible.  If the R-Car driver patch series had not had me
> on the to: list, there is a very good chance I would not have noticed
> it.  Or noticed in a more delayed time frame.  And the same applies to
> anyone else who might be subscribed to the devicetree mail list.  If
> the Pantelis patch series was split out into a separate patch set then
> it would be more visible on the list.
> 
> (2) There is no good way to indicate in the email subject lines for
> the Pantelis patches that they are version 3 of the series, since
> they are also version 4 of the R-Car patch series.  If one reads the
> patch 0/0 header carefully, and/or the other Pantelis patch comment
> headers carefully, and then does a little detective work, it is
> possible to find version 2 of the Pantelis patch series, and thus
> be able to track the full history.  If just glancing at each
> individual patch email subject, scanning the patch comment, and
> spending more time reading the body of the patch, it would be
> very easy to overlook the existence of the previous versions on
> the mail list.
> 
> (2b) Small quibble:  if the Pantelis patches were in a separate series,
> with v3 in the subject header, then you would have normally put
> a "changes since v2" section in the patch comment header, which would
> have been more visible and less cryptic than what you wrote, which was:
> 
>    ...
> 
>    Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>    [Fixed memory leak in __of_changeset_add_update_property_copy()]
>    Signed-off-by: Laurent Pinchart
> <laurent.pinchart+renesas@ideasonboard.com>
>    ---
>     drivers/of/dynamic.c | 222 ++++++++++++++++++++++++++++++++++
>     include/linux/of.h   | 328 +++++++++++++++++++++++++++++++++++++++++++++
>     2 files changed, 550 insertions(+)
> 
> My original scan of version 2 and then the email in this series had me
> questioning whether the two open issues from patch 2 had been addressed
> (yes, patch 0/16 did explicitly mention that 2 review comments had been
> taken into account, so you can point at my poor reading comprehension).

All points dully noted, I'll make sure not to include similar patches in the 
middle of a driver series should I need to rework a patch series previously 
posted by someone else.

I assume your comments also apply to patches to drivers/of/ that are developed 
as part of a drivers series, not merely pulled in it ? I have mixed feelings 
about this, as in many subsystems changes to the core require at least one 
user. Always splitting core and driver changes in separate series would thus 
often be impractical.

I doubt we will find a single process that will suit all subsystem 
maintainers, so maybe this should be a per-subsystem decision ?

> (3) This is totally unrelated to your patch series, but I'm leaving a bread
> crumb trail here.  Rob pointed you at a patch series that was not the most
> recent version.  When this patch series appears again, there already is
> a version 3 subset of it, but it is still labeled as being version 2, and
> also has outstanding un-addressed issues.  ("[PATCH v2 1/2] of: dynamic:
> Add __of_node_dupv()", 11/04/16)

Ah, thank you for the information. I was looking for a v3 but missed that one 
as it was labeled v2.

-- 
Regards,

Laurent Pinchart

Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Laurent Pinchart]

Hi Frank,

On Friday, 23 February 2018 05:20:43 EET Frank Rowand wrote:
> On 02/22/18 02:25, Laurent Pinchart wrote:
> > On Thursday, 22 February 2018 08:07:14 EET Frank Rowand wrote:
> >> On 02/20/18 15:10, 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.
> >> 
> >> Wait a minute!  Why are you putting a patch set to modify core devicetree
> >> in the middle of a driver series.  Please pull it out to a separate
> >> series.
> > 
> > Because Rob asked for the driver-local implementation of the property add
> > function to be replaced by Pantelis' series. I want to get the LVDS
> > changes in v4.17 and asked Rob whether I could then take the OF changeset
> > patches merged through the DRM tree, and he didn't object. If that causes
> > an issue I'll switch back to the driver-local implementation to get the
> > driver changes merged, split the OF changeset series out, and then move
> > to the OF changeset API once merged. Would you prefer that ?
> 
> You have already created a new version of the R-Car patches without the
> set of patches that I was objecting to here.  So this is somewhat just
> an academic comment.
> 
> As I mentioned in the v6 thread, I am coming back here to clean up loose
> ends, and explain why I had the reaction I had.  Basically, this is a
> process issue to me.
> 
> (1) The patch set from Pantelis is "hidden" in the driver patch series.
> When viewing collapsed threads (which is my normal mode to avoid getting
> overwhelmed by the vast volume of email I scan), the Pantelis patch set
> is totally invisible.  If the R-Car driver patch series had not had me
> on the to: list, there is a very good chance I would not have noticed
> it.  Or noticed in a more delayed time frame.  And the same applies to
> anyone else who might be subscribed to the devicetree mail list.  If
> the Pantelis patch series was split out into a separate patch set then
> it would be more visible on the list.
> 
> (2) There is no good way to indicate in the email subject lines for
> the Pantelis patches that they are version 3 of the series, since
> they are also version 4 of the R-Car patch series.  If one reads the
> patch 0/0 header carefully, and/or the other Pantelis patch comment
> headers carefully, and then does a little detective work, it is
> possible to find version 2 of the Pantelis patch series, and thus
> be able to track the full history.  If just glancing at each
> individual patch email subject, scanning the patch comment, and
> spending more time reading the body of the patch, it would be
> very easy to overlook the existence of the previous versions on
> the mail list.
> 
> (2b) Small quibble:  if the Pantelis patches were in a separate series,
> with v3 in the subject header, then you would have normally put
> a "changes since v2" section in the patch comment header, which would
> have been more visible and less cryptic than what you wrote, which was:
> 
>    ...
> 
>    Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>    [Fixed memory leak in __of_changeset_add_update_property_copy()]
>    Signed-off-by: Laurent Pinchart
> <laurent.pinchart+renesas@ideasonboard.com>
>    ---
>     drivers/of/dynamic.c | 222 ++++++++++++++++++++++++++++++++++
>     include/linux/of.h   | 328 +++++++++++++++++++++++++++++++++++++++++++++
>     2 files changed, 550 insertions(+)
> 
> My original scan of version 2 and then the email in this series had me
> questioning whether the two open issues from patch 2 had been addressed
> (yes, patch 0/16 did explicitly mention that 2 review comments had been
> taken into account, so you can point at my poor reading comprehension).

All points dully noted, I'll make sure not to include similar patches in the 
middle of a driver series should I need to rework a patch series previously 
posted by someone else.

I assume your comments also apply to patches to drivers/of/ that are developed 
as part of a drivers series, not merely pulled in it ? I have mixed feelings 
about this, as in many subsystems changes to the core require at least one 
user. Always splitting core and driver changes in separate series would thus 
often be impractical.

I doubt we will find a single process that will suit all subsystem 
maintainers, so maybe this should be a per-subsystem decision ?

> (3) This is totally unrelated to your patch series, but I'm leaving a bread
> crumb trail here.  Rob pointed you at a patch series that was not the most
> recent version.  When this patch series appears again, there already is
> a version 3 subset of it, but it is still labeled as being version 2, and
> also has outstanding un-addressed issues.  ("[PATCH v2 1/2] of: dynamic:
> Add __of_node_dupv()", 11/04/16)

Ah, thank you for the information. I was looking for a v3 but missed that one 
as it was labeled v2.

-- 
Regards,

Laurent Pinchart

_______________________________________________
dri-devel mailing list
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Re: [PATCH v4 11/16] ARM: dts: r8a7791: Convert to new LVDS DT bindings

[Sergei Shtylyov]

Hello!

On 2/21/2018 2:10 AM, Laurent Pinchart wrote:

> The internal LVDS encoder now has DT bindings separate from the DU. Port
> the device tree over to the new model.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
> Changes since v3:
> 
> - Added power-domains and resets properties to LVDS nodes
> 
> Changes since v2:
> 
> - Fixed LVDS compatible string
> 
> Changes since v1:
> 
> - Remove the DU reg-names property
> ---
>   arch/arm/boot/dts/r8a7791-koelsch.dts | 10 ++++++++--
>   arch/arm/boot/dts/r8a7791-porter.dts  | 16 +++++++++++++---
>   arch/arm/boot/dts/r8a7791.dtsi        | 36 +++++++++++++++++++++++++++++------
>   3 files changed, 51 insertions(+), 11 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/r8a7791-koelsch.dts b/arch/arm/boot/dts/r8a7791-koelsch.dts
> index a50924d12b6f..c42ff25e3aa3 100644
> --- a/arch/arm/boot/dts/r8a7791-koelsch.dts
> +++ b/arch/arm/boot/dts/r8a7791-koelsch.dts
> @@ -337,8 +337,7 @@
>   
>   	clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>, <&cpg CPG_MOD 726>,
>   		 <&x13_clk>, <&x2_clk>;
> -	clock-names = "du.0", "du.1", "lvds.0",
> -		      "dclkin.0", "dclkin.1";
> +	clock-names = "du.0", "du.1", "dclkin.0", "dclkin.1";

    Er, you only deleted the LVDS clock name but not LVDS clock itself?

[...]
> diff --git a/arch/arm/boot/dts/r8a7791.dtsi b/arch/arm/boot/dts/r8a7791.dtsi
> index 008a260f86a5..8660f8a329c7 100644
> --- a/arch/arm/boot/dts/r8a7791.dtsi
> +++ b/arch/arm/boot/dts/r8a7791.dtsi
[...]

MBR, Sergei

Re: [PATCH v4 11/16] ARM: dts: r8a7791: Convert to new LVDS DT bindings

[Sergei Shtylyov]

Hello!

On 2/21/2018 2:10 AM, Laurent Pinchart wrote:

> The internal LVDS encoder now has DT bindings separate from the DU. Port
> the device tree over to the new model.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
> Changes since v3:
> 
> - Added power-domains and resets properties to LVDS nodes
> 
> Changes since v2:
> 
> - Fixed LVDS compatible string
> 
> Changes since v1:
> 
> - Remove the DU reg-names property
> ---
>   arch/arm/boot/dts/r8a7791-koelsch.dts | 10 ++++++++--
>   arch/arm/boot/dts/r8a7791-porter.dts  | 16 +++++++++++++---
>   arch/arm/boot/dts/r8a7791.dtsi        | 36 +++++++++++++++++++++++++++++------
>   3 files changed, 51 insertions(+), 11 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/r8a7791-koelsch.dts b/arch/arm/boot/dts/r8a7791-koelsch.dts
> index a50924d12b6f..c42ff25e3aa3 100644
> --- a/arch/arm/boot/dts/r8a7791-koelsch.dts
> +++ b/arch/arm/boot/dts/r8a7791-koelsch.dts
> @@ -337,8 +337,7 @@
>   
>   	clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>, <&cpg CPG_MOD 726>,
>   		 <&x13_clk>, <&x2_clk>;
> -	clock-names = "du.0", "du.1", "lvds.0",
> -		      "dclkin.0", "dclkin.1";
> +	clock-names = "du.0", "du.1", "dclkin.0", "dclkin.1";

    Er, you only deleted the LVDS clock name but not LVDS clock itself?

[...]
> diff --git a/arch/arm/boot/dts/r8a7791.dtsi b/arch/arm/boot/dts/r8a7791.dtsi
> index 008a260f86a5..8660f8a329c7 100644
> --- a/arch/arm/boot/dts/r8a7791.dtsi
> +++ b/arch/arm/boot/dts/r8a7791.dtsi
[...]

MBR, Sergei
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Re: [PATCH v4 11/16] ARM: dts: r8a7791: Convert to new LVDS DT bindings

[Laurent Pinchart]

Hi Sergei,

On Friday, 23 February 2018 11:32:54 EET Sergei Shtylyov wrote:
> On 2/21/2018 2:10 AM, Laurent Pinchart wrote:
> > The internal LVDS encoder now has DT bindings separate from the DU. Port
> > the device tree over to the new model.
> > 
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas@ideasonboard.com>
> > ---
> > Changes since v3:
> > 
> > - Added power-domains and resets properties to LVDS nodes
> > 
> > Changes since v2:
> > 
> > - Fixed LVDS compatible string
> > 
> > Changes since v1:
> > 
> > - Remove the DU reg-names property
> > ---
> > 
> >   arch/arm/boot/dts/r8a7791-koelsch.dts | 10 ++++++++--
> >   arch/arm/boot/dts/r8a7791-porter.dts  | 16 +++++++++++++---
> >   arch/arm/boot/dts/r8a7791.dtsi        | 36 +++++++++++++++++++++++++----
> >   3 files changed, 51 insertions(+), 11 deletions(-)
> > 
> > diff --git a/arch/arm/boot/dts/r8a7791-koelsch.dts
> > b/arch/arm/boot/dts/r8a7791-koelsch.dts index a50924d12b6f..c42ff25e3aa3
> > 100644
> > --- a/arch/arm/boot/dts/r8a7791-koelsch.dts
> > +++ b/arch/arm/boot/dts/r8a7791-koelsch.dts
> > @@ -337,8 +337,7 @@
> > 
> >   	clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>, <&cpg CPG_MOD 726>,
> >   	
> >   		 <&x13_clk>, <&x2_clk>;
> > 
> > -	clock-names = "du.0", "du.1", "lvds.0",
> > -		      "dclkin.0", "dclkin.1";
> > +	clock-names = "du.0", "du.1", "dclkin.0", "dclkin.1";
> 
> Er, you only deleted the LVDS clock name but not LVDS clock itself?

Oops :-/ Will be fixed in the next version. Does it show that I don't have a 
Koelsch board to run tests ? :-)

> > diff --git a/arch/arm/boot/dts/r8a7791.dtsi
> > b/arch/arm/boot/dts/r8a7791.dtsi index 008a260f86a5..8660f8a329c7 100644
> > --- a/arch/arm/boot/dts/r8a7791.dtsi
> > +++ b/arch/arm/boot/dts/r8a7791.dtsi
> 
> [...]

-- 
Regards,

Laurent Pinchart

Re: [PATCH v4 11/16] ARM: dts: r8a7791: Convert to new LVDS DT bindings

[Laurent Pinchart]

Hi Sergei,

On Friday, 23 February 2018 11:32:54 EET Sergei Shtylyov wrote:
> On 2/21/2018 2:10 AM, Laurent Pinchart wrote:
> > The internal LVDS encoder now has DT bindings separate from the DU. Port
> > the device tree over to the new model.
> > 
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas@ideasonboard.com>
> > ---
> > Changes since v3:
> > 
> > - Added power-domains and resets properties to LVDS nodes
> > 
> > Changes since v2:
> > 
> > - Fixed LVDS compatible string
> > 
> > Changes since v1:
> > 
> > - Remove the DU reg-names property
> > ---
> > 
> >   arch/arm/boot/dts/r8a7791-koelsch.dts | 10 ++++++++--
> >   arch/arm/boot/dts/r8a7791-porter.dts  | 16 +++++++++++++---
> >   arch/arm/boot/dts/r8a7791.dtsi        | 36 +++++++++++++++++++++++++----
> >   3 files changed, 51 insertions(+), 11 deletions(-)
> > 
> > diff --git a/arch/arm/boot/dts/r8a7791-koelsch.dts
> > b/arch/arm/boot/dts/r8a7791-koelsch.dts index a50924d12b6f..c42ff25e3aa3
> > 100644
> > --- a/arch/arm/boot/dts/r8a7791-koelsch.dts
> > +++ b/arch/arm/boot/dts/r8a7791-koelsch.dts
> > @@ -337,8 +337,7 @@
> > 
> >   	clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>, <&cpg CPG_MOD 726>,
> >   	
> >   		 <&x13_clk>, <&x2_clk>;
> > 
> > -	clock-names = "du.0", "du.1", "lvds.0",
> > -		      "dclkin.0", "dclkin.1";
> > +	clock-names = "du.0", "du.1", "dclkin.0", "dclkin.1";
> 
> Er, you only deleted the LVDS clock name but not LVDS clock itself?

Oops :-/ Will be fixed in the next version. Does it show that I don't have a 
Koelsch board to run tests ? :-)

> > diff --git a/arch/arm/boot/dts/r8a7791.dtsi
> > b/arch/arm/boot/dts/r8a7791.dtsi index 008a260f86a5..8660f8a329c7 100644
> > --- a/arch/arm/boot/dts/r8a7791.dtsi
> > +++ b/arch/arm/boot/dts/r8a7791.dtsi
> 
> [...]

-- 
Regards,

Laurent Pinchart

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Re: [PATCH v4 11/16] ARM: dts: r8a7791: Convert to new LVDS DT bindings

[Sergei Shtylyov]

On 2/21/2018 2:10 AM, Laurent Pinchart wrote:

> The internal LVDS encoder now has DT bindings separate from the DU. Port
> the device tree over to the new model.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

[...]
> diff --git a/arch/arm/boot/dts/r8a7791.dtsi b/arch/arm/boot/dts/r8a7791.dtsi
> index 008a260f86a5..8660f8a329c7 100644
> --- a/arch/arm/boot/dts/r8a7791.dtsi
> +++ b/arch/arm/boot/dts/r8a7791.dtsi
[...]
> @@ -1126,6 +1123,33 @@
>   			port@1 {
>   				reg = <1>;
>   				du_out_lvds0: endpoint {
> +					remote-endpoint = <&lvds0_in>;
> +				};
> +			};
> +		};
> +	};
> +
> +	lvds0: lvds@feb90000 {

    I suggest that we use the label "lvds" w/o #, compatible with the manual...

[...]

MBR, Sergei

Re: [PATCH v4 11/16] ARM: dts: r8a7791: Convert to new LVDS DT bindings

[Sergei Shtylyov]

On 2/21/2018 2:10 AM, Laurent Pinchart wrote:

> The internal LVDS encoder now has DT bindings separate from the DU. Port
> the device tree over to the new model.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

[...]
> diff --git a/arch/arm/boot/dts/r8a7791.dtsi b/arch/arm/boot/dts/r8a7791.dtsi
> index 008a260f86a5..8660f8a329c7 100644
> --- a/arch/arm/boot/dts/r8a7791.dtsi
> +++ b/arch/arm/boot/dts/r8a7791.dtsi
[...]
> @@ -1126,6 +1123,33 @@
>   			port@1 {
>   				reg = <1>;
>   				du_out_lvds0: endpoint {
> +					remote-endpoint = <&lvds0_in>;
> +				};
> +			};
> +		};
> +	};
> +
> +	lvds0: lvds@feb90000 {

    I suggest that we use the label "lvds" w/o #, compatible with the manual...

[...]

MBR, Sergei
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Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Frank Rowand]

On 02/23/18 01:25, Laurent Pinchart wrote:
> Hi Frank,
> 
> On Friday, 23 February 2018 05:20:43 EET Frank Rowand wrote:
>> On 02/22/18 02:25, Laurent Pinchart wrote:
>>> On Thursday, 22 February 2018 08:07:14 EET Frank Rowand wrote:
>>>> On 02/20/18 15:10, 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.
>>>>
>>>> Wait a minute!  Why are you putting a patch set to modify core devicetree
>>>> in the middle of a driver series.  Please pull it out to a separate
>>>> series.
>>>
>>> Because Rob asked for the driver-local implementation of the property add
>>> function to be replaced by Pantelis' series. I want to get the LVDS
>>> changes in v4.17 and asked Rob whether I could then take the OF changeset
>>> patches merged through the DRM tree, and he didn't object. If that causes
>>> an issue I'll switch back to the driver-local implementation to get the
>>> driver changes merged, split the OF changeset series out, and then move
>>> to the OF changeset API once merged. Would you prefer that ?
>>
>> You have already created a new version of the R-Car patches without the
>> set of patches that I was objecting to here.  So this is somewhat just
>> an academic comment.
>>
>> As I mentioned in the v6 thread, I am coming back here to clean up loose
>> ends, and explain why I had the reaction I had.  Basically, this is a
>> process issue to me.
>>
>> (1) The patch set from Pantelis is "hidden" in the driver patch series.
>> When viewing collapsed threads (which is my normal mode to avoid getting
>> overwhelmed by the vast volume of email I scan), the Pantelis patch set
>> is totally invisible.  If the R-Car driver patch series had not had me
>> on the to: list, there is a very good chance I would not have noticed
>> it.  Or noticed in a more delayed time frame.  And the same applies to
>> anyone else who might be subscribed to the devicetree mail list.  If
>> the Pantelis patch series was split out into a separate patch set then
>> it would be more visible on the list.
>>
>> (2) There is no good way to indicate in the email subject lines for
>> the Pantelis patches that they are version 3 of the series, since
>> they are also version 4 of the R-Car patch series.  If one reads the
>> patch 0/0 header carefully, and/or the other Pantelis patch comment
>> headers carefully, and then does a little detective work, it is
>> possible to find version 2 of the Pantelis patch series, and thus
>> be able to track the full history.  If just glancing at each
>> individual patch email subject, scanning the patch comment, and
>> spending more time reading the body of the patch, it would be
>> very easy to overlook the existence of the previous versions on
>> the mail list.
>>
>> (2b) Small quibble:  if the Pantelis patches were in a separate series,
>> with v3 in the subject header, then you would have normally put
>> a "changes since v2" section in the patch comment header, which would
>> have been more visible and less cryptic than what you wrote, which was:
>>
>>    ...
>>
>>    Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>>    [Fixed memory leak in __of_changeset_add_update_property_copy()]
>>    Signed-off-by: Laurent Pinchart
>> <laurent.pinchart+renesas@ideasonboard.com>
>>    ---
>>     drivers/of/dynamic.c | 222 ++++++++++++++++++++++++++++++++++
>>     include/linux/of.h   | 328 +++++++++++++++++++++++++++++++++++++++++++++
>>     2 files changed, 550 insertions(+)
>>
>> My original scan of version 2 and then the email in this series had me
>> questioning whether the two open issues from patch 2 had been addressed
>> (yes, patch 0/16 did explicitly mention that 2 review comments had been
>> taken into account, so you can point at my poor reading comprehension).
> 
> All points dully noted, I'll make sure not to include similar patches in the 
> middle of a driver series should I need to rework a patch series previously 
> posted by someone else.
> 
> I assume your comments also apply to patches to drivers/of/ that are developed 
> as part of a drivers series, not merely pulled in it ?

Yes, as a normal process.  Of course we find cases where following normal process
causes problems, and it can be better to do something different in those cases.


> I have mixed feelings 
> about this, as in many subsystems changes to the core require at least one 
> user. Always splitting core and driver changes in separate series would thus 
> often be impractical.

If at all reasonable, I would still prefer to see two patch series for this
case.  I would expect both series to be upstreamed by a single maintainer
(with the two involved maintainers coordinating this process).  I have not
thought this through in any detail, so I don't know if I'm missing a bunch
of issues.  One issue that I can think of is clearly documenting which
version of the subsystem patch series any given version of the driver patch
series depends upon.  That should be easy to note in patch 0 of the driver
series.  Do you have experience with any other issues in this scenario?

This sounds like a good topic to include in the "Guide to Being A Linux Kernel
Maintainer".


> I doubt we will find a single process that will suit all subsystem 
> maintainers, so maybe this should be a per-subsystem decision ?

Totally agree.  And even for me, I see it as a guideline or normal process,
with exceptions made where it makes sense.


>> (3) This is totally unrelated to your patch series, but I'm leaving a bread
>> crumb trail here.  Rob pointed you at a patch series that was not the most
>> recent version.  When this patch series appears again, there already is
>> a version 3 subset of it, but it is still labeled as being version 2, and
>> also has outstanding un-addressed issues.  ("[PATCH v2 1/2] of: dynamic:
>> Add __of_node_dupv()", 11/04/16)
> 
> Ah, thank you for the information. I was looking for a v3 but missed that one 
> as it was labeled v2.
> 

Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Frank Rowand]

On 02/23/18 01:25, Laurent Pinchart wrote:
> Hi Frank,
> 
> On Friday, 23 February 2018 05:20:43 EET Frank Rowand wrote:
>> On 02/22/18 02:25, Laurent Pinchart wrote:
>>> On Thursday, 22 February 2018 08:07:14 EET Frank Rowand wrote:
>>>> On 02/20/18 15:10, 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.
>>>>
>>>> Wait a minute!  Why are you putting a patch set to modify core devicetree
>>>> in the middle of a driver series.  Please pull it out to a separate
>>>> series.
>>>
>>> Because Rob asked for the driver-local implementation of the property add
>>> function to be replaced by Pantelis' series. I want to get the LVDS
>>> changes in v4.17 and asked Rob whether I could then take the OF changeset
>>> patches merged through the DRM tree, and he didn't object. If that causes
>>> an issue I'll switch back to the driver-local implementation to get the
>>> driver changes merged, split the OF changeset series out, and then move
>>> to the OF changeset API once merged. Would you prefer that ?
>>
>> You have already created a new version of the R-Car patches without the
>> set of patches that I was objecting to here.  So this is somewhat just
>> an academic comment.
>>
>> As I mentioned in the v6 thread, I am coming back here to clean up loose
>> ends, and explain why I had the reaction I had.  Basically, this is a
>> process issue to me.
>>
>> (1) The patch set from Pantelis is "hidden" in the driver patch series.
>> When viewing collapsed threads (which is my normal mode to avoid getting
>> overwhelmed by the vast volume of email I scan), the Pantelis patch set
>> is totally invisible.  If the R-Car driver patch series had not had me
>> on the to: list, there is a very good chance I would not have noticed
>> it.  Or noticed in a more delayed time frame.  And the same applies to
>> anyone else who might be subscribed to the devicetree mail list.  If
>> the Pantelis patch series was split out into a separate patch set then
>> it would be more visible on the list.
>>
>> (2) There is no good way to indicate in the email subject lines for
>> the Pantelis patches that they are version 3 of the series, since
>> they are also version 4 of the R-Car patch series.  If one reads the
>> patch 0/0 header carefully, and/or the other Pantelis patch comment
>> headers carefully, and then does a little detective work, it is
>> possible to find version 2 of the Pantelis patch series, and thus
>> be able to track the full history.  If just glancing at each
>> individual patch email subject, scanning the patch comment, and
>> spending more time reading the body of the patch, it would be
>> very easy to overlook the existence of the previous versions on
>> the mail list.
>>
>> (2b) Small quibble:  if the Pantelis patches were in a separate series,
>> with v3 in the subject header, then you would have normally put
>> a "changes since v2" section in the patch comment header, which would
>> have been more visible and less cryptic than what you wrote, which was:
>>
>>    ...
>>
>>    Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
>>    [Fixed memory leak in __of_changeset_add_update_property_copy()]
>>    Signed-off-by: Laurent Pinchart
>> <laurent.pinchart+renesas@ideasonboard.com>
>>    ---
>>     drivers/of/dynamic.c | 222 ++++++++++++++++++++++++++++++++++
>>     include/linux/of.h   | 328 +++++++++++++++++++++++++++++++++++++++++++++
>>     2 files changed, 550 insertions(+)
>>
>> My original scan of version 2 and then the email in this series had me
>> questioning whether the two open issues from patch 2 had been addressed
>> (yes, patch 0/16 did explicitly mention that 2 review comments had been
>> taken into account, so you can point at my poor reading comprehension).
> 
> All points dully noted, I'll make sure not to include similar patches in the 
> middle of a driver series should I need to rework a patch series previously 
> posted by someone else.
> 
> I assume your comments also apply to patches to drivers/of/ that are developed 
> as part of a drivers series, not merely pulled in it ?

Yes, as a normal process.  Of course we find cases where following normal process
causes problems, and it can be better to do something different in those cases.


> I have mixed feelings 
> about this, as in many subsystems changes to the core require at least one 
> user. Always splitting core and driver changes in separate series would thus 
> often be impractical.

If at all reasonable, I would still prefer to see two patch series for this
case.  I would expect both series to be upstreamed by a single maintainer
(with the two involved maintainers coordinating this process).  I have not
thought this through in any detail, so I don't know if I'm missing a bunch
of issues.  One issue that I can think of is clearly documenting which
version of the subsystem patch series any given version of the driver patch
series depends upon.  That should be easy to note in patch 0 of the driver
series.  Do you have experience with any other issues in this scenario?

This sounds like a good topic to include in the "Guide to Being A Linux Kernel
Maintainer".


> I doubt we will find a single process that will suit all subsystem 
> maintainers, so maybe this should be a per-subsystem decision ?

Totally agree.  And even for me, I see it as a guideline or normal process,
with exceptions made where it makes sense.


>> (3) This is totally unrelated to your patch series, but I'm leaving a bread
>> crumb trail here.  Rob pointed you at a patch series that was not the most
>> recent version.  When this patch series appears again, there already is
>> a version 3 subset of it, but it is still labeled as being version 2, and
>> also has outstanding un-addressed issues.  ("[PATCH v2 1/2] of: dynamic:
>> Add __of_node_dupv()", 11/04/16)
> 
> Ah, thank you for the information. I was looking for a v3 but missed that one 
> as it was labeled v2.
> 

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Re: [PATCH v4 11/16] ARM: dts: r8a7791: Convert to new LVDS DT bindings

[Laurent Pinchart]

Hi Sergei,

On Friday, 23 February 2018 11:51:59 EET Sergei Shtylyov wrote:
> On 2/21/2018 2:10 AM, Laurent Pinchart wrote:
> > The internal LVDS encoder now has DT bindings separate from the DU. Port
> > the device tree over to the new model.
> > 
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas@ideasonboard.com>
> 
> [...]
> 
> > diff --git a/arch/arm/boot/dts/r8a7791.dtsi
> > b/arch/arm/boot/dts/r8a7791.dtsi index 008a260f86a5..8660f8a329c7 100644
> > --- a/arch/arm/boot/dts/r8a7791.dtsi
> > +++ b/arch/arm/boot/dts/r8a7791.dtsi
> 
> [...]
> 
> > @@ -1126,6 +1123,33 @@
> >   			port@1 {
> >   				reg = <1>;
> >   				du_out_lvds0: endpoint {
> > +					remote-endpoint = <&lvds0_in>;
> > +				};
> > +			};
> > +		};
> > +	};
> > +
> > +	lvds0: lvds@feb90000 {
> 
> I suggest that we use the label "lvds" w/o #, compatible with the manual...

The manual uses "LVDS" in some places (figure 25.1b or table 25.1 for 
instance) and LVDS0 in other (table 25.3 for instance). I don't think this is 
a big deal, and if we need to refer to the LVDS node by phandle, I'd rather 
use lvds0 consistently on all SoCs to make writing shared DT sources easier.

-- 
Regards,

Laurent Pinchart

Re: [PATCH v4 11/16] ARM: dts: r8a7791: Convert to new LVDS DT bindings

[Laurent Pinchart]

Hi Sergei,

On Friday, 23 February 2018 11:51:59 EET Sergei Shtylyov wrote:
> On 2/21/2018 2:10 AM, Laurent Pinchart wrote:
> > The internal LVDS encoder now has DT bindings separate from the DU. Port
> > the device tree over to the new model.
> > 
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas@ideasonboard.com>
> 
> [...]
> 
> > diff --git a/arch/arm/boot/dts/r8a7791.dtsi
> > b/arch/arm/boot/dts/r8a7791.dtsi index 008a260f86a5..8660f8a329c7 100644
> > --- a/arch/arm/boot/dts/r8a7791.dtsi
> > +++ b/arch/arm/boot/dts/r8a7791.dtsi
> 
> [...]
> 
> > @@ -1126,6 +1123,33 @@
> >   			port@1 {
> >   				reg = <1>;
> >   				du_out_lvds0: endpoint {
> > +					remote-endpoint = <&lvds0_in>;
> > +				};
> > +			};
> > +		};
> > +	};
> > +
> > +	lvds0: lvds@feb90000 {
> 
> I suggest that we use the label "lvds" w/o #, compatible with the manual...

The manual uses "LVDS" in some places (figure 25.1b or table 25.1 for 
instance) and LVDS0 in other (table 25.3 for instance). I don't think this is 
a big deal, and if we need to refer to the LVDS node by phandle, I'd rather 
use lvds0 consistently on all SoCs to make writing shared DT sources easier.

-- 
Regards,

Laurent Pinchart

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Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Laurent Pinchart]

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

Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Simon Horman]

On Thu, May 24, 2018 at 11:00:52AM +0300, Laurent Pinchart wrote:
> 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 ?

Unfortunately it is. Shall I apply them for v4.19?

> > 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
> 
> 
> 

Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Laurent Pinchart]

Hi Simon,

On Friday, 25 May 2018 13:13:20 EEST Simon Horman wrote:
> On Thu, May 24, 2018 at 11:00:52AM +0300, Laurent Pinchart wrote:
> > 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:

[snip]

> >>> 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 ?
> 
> Unfortunately it is. Shall I apply them for v4.19?

Please do.

> >> 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

Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Simon Horman]

On Fri, May 25, 2018 at 01:23:53PM +0300, Laurent Pinchart wrote:
> Hi Simon,
> 
> On Friday, 25 May 2018 13:13:20 EEST Simon Horman wrote:
> > On Thu, May 24, 2018 at 11:00:52AM +0300, Laurent Pinchart wrote:
> > > 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:
> 
> [snip]
> 
> > >>> 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 ?
> > 
> > Unfortunately it is. Shall I apply them for v4.19?
> 
> Please do.

Hi Laurent,

I'm sorry to have to ask this, but in the light of Olof Johansson's recent
comments in ("Re: [GIT PULL] Renesas ARM64 Based SoC DT Updates for v4.18")
please consider squashing the DTS patches and reposting.

Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Laurent Pinchart]

Hi Simon,

On Monday, 28 May 2018 12:39:17 EEST Simon Horman wrote:
> On Fri, May 25, 2018 at 01:23:53PM +0300, Laurent Pinchart wrote:
> > On Friday, 25 May 2018 13:13:20 EEST Simon Horman wrote:
> >> On Thu, May 24, 2018 at 11:00:52AM +0300, Laurent Pinchart wrote:
> >>> 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:
> > 
> > [snip]
> > 
> >>>>> 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
> >>> ?
> >> 
> >> Unfortunately it is. Shall I apply them for v4.19?
> > 
> > Please do.
> 
> Hi Laurent,
> 
> I'm sorry to have to ask this, but in the light of Olof Johansson's recent
> comments in ("Re: [GIT PULL] Renesas ARM64 Based SoC DT Updates for v4.18")
> please consider squashing the DTS patches and reposting.

It's about time we stopped trying to game the kernel patch statistics :-)

Before I repost, has there been a consensus on the new rule ? And how are we 
expected to proceed from now on ?

-- 
Regards,

Laurent Pinchart

Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Simon Horman]

On Mon, May 28, 2018 at 12:45:32PM +0300, Laurent Pinchart wrote:
> Hi Simon,
> 
> On Monday, 28 May 2018 12:39:17 EEST Simon Horman wrote:
> > On Fri, May 25, 2018 at 01:23:53PM +0300, Laurent Pinchart wrote:
> > > On Friday, 25 May 2018 13:13:20 EEST Simon Horman wrote:
> > >> On Thu, May 24, 2018 at 11:00:52AM +0300, Laurent Pinchart wrote:
> > >>> 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:
> > > 
> > > [snip]
> > > 
> > >>>>> 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
> > >>> ?
> > >> 
> > >> Unfortunately it is. Shall I apply them for v4.19?
> > > 
> > > Please do.
> > 
> > Hi Laurent,
> > 
> > I'm sorry to have to ask this, but in the light of Olof Johansson's recent
> > comments in ("Re: [GIT PULL] Renesas ARM64 Based SoC DT Updates for v4.18")
> > please consider squashing the DTS patches and reposting.
> 
> It's about time we stopped trying to game the kernel patch statistics :-)
> 
> Before I repost, has there been a consensus on the new rule ? And how are we 
> expected to proceed from now on ?

No, there has not been. And I think there needs to be.

Re: [PATCH v4 00/16] R-Car DU: Convert LVDS code to bridge driver

[Simon Horman]

On Mon, May 28, 2018 at 12:29:15PM +0200, Simon Horman wrote:
> On Mon, May 28, 2018 at 12:45:32PM +0300, Laurent Pinchart wrote:
> > Hi Simon,
> > 
> > On Monday, 28 May 2018 12:39:17 EEST Simon Horman wrote:
> > > On Fri, May 25, 2018 at 01:23:53PM +0300, Laurent Pinchart wrote:
> > > > On Friday, 25 May 2018 13:13:20 EEST Simon Horman wrote:
> > > >> On Thu, May 24, 2018 at 11:00:52AM +0300, Laurent Pinchart wrote:
> > > >>> 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:
> > > > 
> > > > [snip]
> > > > 
> > > >>>>> 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
> > > >>> ?
> > > >> 
> > > >> Unfortunately it is. Shall I apply them for v4.19?
> > > > 
> > > > Please do.
> > > 
> > > Hi Laurent,
> > > 
> > > I'm sorry to have to ask this, but in the light of Olof Johansson's recent
> > > comments in ("Re: [GIT PULL] Renesas ARM64 Based SoC DT Updates for v4.18")
> > > please consider squashing the DTS patches and reposting.
> > 
> > It's about time we stopped trying to game the kernel patch statistics :-)
> > 
> > Before I repost, has there been a consensus on the new rule ? And how are we 
> > expected to proceed from now on ?
> 
> No, there has not been. And I think there needs to be.

Here is my general advice:

When making changes to several files, if you feel that its the same change
made to those several files, then please consider one patch instead
of per-file patches.

What I am suggesting by the above is that we tweak our processes to
reduce the number of patches. If this goes poorly we can learn and go back
to the old patch per-file model. If it goes well we can consider further
patch consolidation.

I know that this is not a hard rule. But for now I'd like to leave people
with some discretion. Lets guide each other via the review process
as this tweaking of our process evolves.