Merge tag 'sun4i-drm-for-4.7' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into drm-next

Allwinner DRM driver for 4.7

This pull request introduces the sun4i driver, meant to be used on the
older Allwinner SoCs (A10, A13, A20, A23, A31 and A33).

It currently supports only the A13, which has one of the simplest video
pipeline. Support for other video components and SoCs will be added
eventually.

It supports only a RGB or composite output. It doesn't do HDMI, VGA, LVDS
or power management yet, but that will come in time as well.

* tag 'sun4i-drm-for-4.7' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux:
  MAINTAINERS: Add a maintainer for the Allwinner DRM driver
  drm: sun4i: tv: Add NTSC output standard
  drm: sun4i: tv: Add PAL output standard
  drm: sun4i: Add composite output
  drm: sun4i: Add RGB output
  drm: Add Allwinner A10 Display Engine support
  drm: sun4i: Add DT bindings documentation
  drm: fb: Add seq_file definition

1 files changed, 258 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
new file mode 100644
index 000000000000..df8f4aeefe4c
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
@@ -0,0 +1,258 @@
+Allwinner A10 Display Pipeline
+==============================
+
+The Allwinner A10 Display pipeline is composed of several components
+that are going to be documented below:
+
+TV Encoder
+----------
+
+The TV Encoder supports the composite and VGA output. It is one end of
+the pipeline.
+
+Required properties:
+ - compatible: value should be "allwinner,sun4i-a10-tv-encoder".
+ - reg: base address and size of memory-mapped region
+ - clocks: the clocks driving the TV encoder
+ - resets: phandle to the reset controller driving the encoder
+
+- ports: A ports node with endpoint definitions as defined in
+  Documentation/devicetree/bindings/media/video-interfaces.txt. The
+  first port should be the input endpoint.
+
+TCON
+----
+
+The TCON acts as a timing controller for RGB, LVDS and TV interfaces.
+
+Required properties:
+ - compatible: value should be "allwinner,sun5i-a13-tcon".
+ - reg: base address and size of memory-mapped region
+ - interrupts: interrupt associated to this IP
+ - clocks: phandles to the clocks feeding the TCON. Three are needed:
+   - 'ahb': the interface clocks
+   - 'tcon-ch0': The clock driving the TCON channel 0
+   - 'tcon-ch1': The clock driving the TCON channel 1
+ - resets: phandles to the reset controllers driving the encoder
+   - "lcd": the reset line for the TCON channel 0
+
+ - clock-names: the clock names mentioned above
+ - reset-names: the reset names mentioned above
+ - clock-output-names: Name of the pixel clock created
+
+- ports: A ports node with endpoint definitions as defined in
+  Documentation/devicetree/bindings/media/video-interfaces.txt. The
+  first port should be the input endpoint, the second one the output
+
+  The output should have two endpoints. The first is the block
+  connected to the TCON channel 0 (usually a panel or a bridge), the
+  second the block connected to the TCON channel 1 (usually the TV
+  encoder)
+
+
+Display Engine Backend
+----------------------
+
+The display engine backend exposes layers and sprites to the
+system.
+
+Required properties:
+  - compatible: value must be one of:
+    * allwinner,sun5i-a13-display-backend
+  - reg: base address and size of the memory-mapped region.
+  - clocks: phandles to the clocks feeding the frontend and backend
+    * ahb: the backend interface clock
+    * mod: the backend module clock
+    * ram: the backend DRAM clock
+  - clock-names: the clock names mentioned above
+  - resets: phandles to the reset controllers driving the backend
+
+- ports: A ports node with endpoint definitions as defined in
+  Documentation/devicetree/bindings/media/video-interfaces.txt. The
+  first port should be the input endpoints, the second one the output
+
+Display Engine Frontend
+-----------------------
+
+The display engine frontend does formats conversion, scaling,
+deinterlacing and color space conversion.
+
+Required properties:
+  - compatible: value must be one of:
+    * allwinner,sun5i-a13-display-frontend
+  - reg: base address and size of the memory-mapped region.
+  - interrupts: interrupt associated to this IP
+  - clocks: phandles to the clocks feeding the frontend and backend
+    * ahb: the backend interface clock
+    * mod: the backend module clock
+    * ram: the backend DRAM clock
+  - clock-names: the clock names mentioned above
+  - resets: phandles to the reset controllers driving the backend
+
+- ports: A ports node with endpoint definitions as defined in
+  Documentation/devicetree/bindings/media/video-interfaces.txt. The
+  first port should be the input endpoints, the second one the outputs
+
+
+Display Engine Pipeline
+-----------------------
+
+The display engine pipeline (and its entry point, since it can be
+either directly the backend or the frontend) is represented as an
+extra node.
+
+Required properties:
+  - compatible: value must be one of:
+    * allwinner,sun5i-a13-display-engine
+
+  - allwinner,pipelines: list of phandle to the display engine
+    frontends available.
+
+Example:
+
+panel: panel {
+	compatible = "olimex,lcd-olinuxino-43-ts";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	port {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		panel_input: endpoint {
+			remote-endpoint = <&tcon0_out_panel>;
+		};
+	};
+};
+
+tve0: tv-encoder@01c0a000 {
+	compatible = "allwinner,sun4i-a10-tv-encoder";
+	reg = <0x01c0a000 0x1000>;
+	clocks = <&ahb_gates 34>;
+	resets = <&tcon_ch0_clk 0>;
+
+	port {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		tve0_in_tcon0: endpoint@0 {
+			reg = <0>;
+			remote-endpoint = <&tcon0_out_tve0>;
+		};
+	};
+};
+
+tcon0: lcd-controller@1c0c000 {
+	compatible = "allwinner,sun5i-a13-tcon";
+	reg = <0x01c0c000 0x1000>;
+	interrupts = <44>;
+	resets = <&tcon_ch0_clk 1>;
+	reset-names = "lcd";
+	clocks = <&ahb_gates 36>,
+		 <&tcon_ch0_clk>,
+		 <&tcon_ch1_clk>;
+	clock-names = "ahb",
+		      "tcon-ch0",
+		      "tcon-ch1";
+	clock-output-names = "tcon-pixel-clock";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		tcon0_in: port@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0>;
+
+			tcon0_in_be0: endpoint@0 {
+				reg = <0>;
+				remote-endpoint = <&be0_out_tcon0>;
+			};
+		};
+
+		tcon0_out: port@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+
+			tcon0_out_panel: endpoint@0 {
+				reg = <0>;
+				remote-endpoint = <&panel_input>;
+			};
+
+			tcon0_out_tve0: endpoint@1 {
+				reg = <1>;
+				remote-endpoint = <&tve0_in_tcon0>;
+			};
+		};
+	};
+};
+
+fe0: display-frontend@1e00000 {
+	compatible = "allwinner,sun5i-a13-display-frontend";
+	reg = <0x01e00000 0x20000>;
+	interrupts = <47>;
+	clocks = <&ahb_gates 46>, <&de_fe_clk>,
+		 <&dram_gates 25>;
+	clock-names = "ahb", "mod",
+		      "ram";
+	resets = <&de_fe_clk>;
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		fe0_out: port@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+
+			fe0_out_be0: endpoint {
+				remote-endpoint = <&be0_in_fe0>;
+			};
+		};
+	};
+};
+
+be0: display-backend@1e60000 {
+	compatible = "allwinner,sun5i-a13-display-backend";
+	reg = <0x01e60000 0x10000>;
+	clocks = <&ahb_gates 44>, <&de_be_clk>,
+		 <&dram_gates 26>;
+	clock-names = "ahb", "mod",
+		      "ram";
+	resets = <&de_be_clk>;
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		be0_in: port@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0>;
+
+			be0_in_fe0: endpoint@0 {
+				reg = <0>;
+				remote-endpoint = <&fe0_out_be0>;
+			};
+		};
+
+		be0_out: port@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+
+			be0_out_tcon0: endpoint@0 {
+				reg = <0>;
+				remote-endpoint = <&tcon0_in_be0>;
+			};
+		};
+	};
+};
+
+display-engine {
+	compatible = "allwinner,sun5i-a13-display-engine";
+	allwinner,pipelines = <&fe0>;
+};