On Sun, Nov 20, 2016 at 10:53:25AM +0100, Jean-Francois Moine wrote:
> Allwinner's recent SoCs, as A64, A83T and H3, contain a new display
> engine, DE2.
> This patch adds a DRM video driver for this device.
>
> Signed-off-by: Jean-Francois Moine <moinejf@xxxxxxx>
> ---
> .../bindings/display/sunxi/sun8i-de2.txt | 83 +++
It's preferred to split bindings to a separate patch.
> drivers/gpu/drm/Kconfig | 2 +
> drivers/gpu/drm/Makefile | 1 +
> drivers/gpu/drm/sun8i/Kconfig | 19 +
> drivers/gpu/drm/sun8i/Makefile | 7 +
> drivers/gpu/drm/sun8i/de2_crtc.c | 440 +++++++++++++
> drivers/gpu/drm/sun8i/de2_crtc.h | 50 ++
> drivers/gpu/drm/sun8i/de2_drm.h | 48 ++
> drivers/gpu/drm/sun8i/de2_drv.c | 379 +++++++++++
> drivers/gpu/drm/sun8i/de2_plane.c | 712 +++++++++++++++++++++
> 10 files changed, 1741 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/display/sunxi/sun8i-de2.txt
> create mode 100644 drivers/gpu/drm/sun8i/Kconfig
> create mode 100644 drivers/gpu/drm/sun8i/Makefile
> create mode 100644 drivers/gpu/drm/sun8i/de2_crtc.c
> create mode 100644 drivers/gpu/drm/sun8i/de2_crtc.h
> create mode 100644 drivers/gpu/drm/sun8i/de2_drm.h
> create mode 100644 drivers/gpu/drm/sun8i/de2_drv.c
> create mode 100644 drivers/gpu/drm/sun8i/de2_plane.c
>
> diff --git a/Documentation/devicetree/bindings/display/sunxi/sun8i-de2.txt b/Documentation/devicetree/bindings/display/sunxi/sun8i-de2.txt
> new file mode 100644
> index 0000000..b9edd4b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/sunxi/sun8i-de2.txt
> @@ -0,0 +1,83 @@
> +Allwinner sun8i Display Engine 2 subsystem
> +==========================================
> +
> +The Allwinner DE2 subsystem contains a display controller (DE2),
> +one or two LCD controllers (TCON) and their external interfaces.
> +
> +Display controller
> +==================
> +
> +Required properties:
> +
> +- compatible: value should be one of the following
> + "allwinner,sun8i-a83t-display-engine"
> + "allwinner,sun8i-h3-display-engine"
> +
> +- clocks: must include clock specifiers corresponding to entries in the
> + clock-names property.
> +
> +- clock-names: must contain
> + "gate": DE bus gate
> + "clock": DE clock
> +
> +- resets: phandle to the reset of the device
> +
> +- ports: phandle's to the LCD ports
This should use OF graph to describe the connection from the DE to the
LCD controllers like the sun4i binding does.
No registers for the DE?
> +
> +LCD controller
> +==============
> +
> +Required properties:
> +
> +- compatible: should be
> + "allwinner,sun8i-a83t-tcon"
> +
> +- clocks: must include clock specifiers corresponding to entries in the
> + clock-names property.
> +
> +- clock-names: must contain
> + "gate": TCON bus gate
> + "clock": TCON pixel clock
> +
> +- resets: phandle to the reset of the device
> +
> +- port: port node with endpoint definitions as defined in
> + Documentation/devicetree/bindings/media/video-interfaces.txt
Need to specify how many ports and endpoints.
> +
> +Example:
> +
> + de: de-controller@01000000 {
> + compatible = "allwinner,sun8i-h3-display-engine";
> + ...
What are you not showing?
> + clocks = <&&ccu CLK_BUS_DE>, <&ccu CLK_DE>;
> + clock-names = "gate", "clock";
> + resets = <&ccu RST_BUS_DE>;
> + ports = <&lcd0_p>;
> + };
> +
> + lcd0: lcd-controller@01c0c000 {
> + compatible = "allwinner,sun8i-a83t-tcon";
> + ...
ditto.
> + clocks = <&ccu CLK_BUS_TCON0>, <&ccu CLK_TCON0>;
> + clock-names = "gate", "clock";
> + resets = <&ccu RST_BUS_TCON0>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + lcd0_p: port {
> + lcd0_ep: endpoint {
> + remote-endpoint = <&hdmi_ep>;
> + };
> + };
> + };
> +
> + hdmi: hdmi@01ee0000 {
> + ...
> + #address-cells = <1>;
> + #size-cells = <0>;
> + port {
> + hdmi_ep: endpoint {
> + remote-endpoint = <&lcd0_ep>;
> + };
> + };
> + };
> +
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