drm: imx: Move imx-drm driver out of staging

The imx-drm driver was put into staging mostly for the following reasons,
all of which have been addressed or superseded:
 - convert the irq driver to use linear irq domains
 - work out the device tree bindings, this lead to the common of_graph
   bindings being used
 - factor out common helper functions, this mostly resulted in the
   component framework and drm of_graph helpers.

Before adding new fixes, and certainly before adding new features,
move it into its proper place below drivers/gpu/drm.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>

3 files changed, 263 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/drm/imx/fsl-imx-drm.txt b/Documentation/devicetree/bindings/drm/imx/fsl-imx-drm.txt
new file mode 100644
index 000000000000..e75f0e549fff
--- /dev/null
+++ b/Documentation/devicetree/bindings/drm/imx/fsl-imx-drm.txt
@@ -0,0 +1,83 @@
+Freescale i.MX DRM master device
+================================
+
+The freescale i.MX DRM master device is a virtual device needed to list all
+IPU or other display interface nodes that comprise the graphics subsystem.
+
+Required properties:
+- compatible: Should be "fsl,imx-display-subsystem"
+- ports: Should contain a list of phandles pointing to display interface ports
+  of IPU devices
+
+example:
+
+display-subsystem {
+        compatible = "fsl,display-subsystem";
+        ports = <&ipu_di0>;
+};
+
+
+Freescale i.MX IPUv3
+====================
+
+Required properties:
+- compatible: Should be "fsl,<chip>-ipu"
+- reg: should be register base and length as documented in the
+  datasheet
+- interrupts: Should contain sync interrupt and error interrupt,
+  in this order.
+- resets: phandle pointing to the system reset controller and
+          reset line index, see reset/fsl,imx-src.txt for details
+Optional properties:
+- port@[0-3]: Port nodes with endpoint definitions as defined in
+  Documentation/devicetree/bindings/media/video-interfaces.txt.
+  Ports 0 and 1 should correspond to CSI0 and CSI1,
+  ports 2 and 3 should correspond to DI0 and DI1, respectively.
+
+example:
+
+ipu: ipu@18000000 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        compatible = "fsl,imx53-ipu";
+        reg = <0x18000000 0x080000000>;
+        interrupts = <11 10>;
+        resets = <&src 2>;
+
+        ipu_di0: port@2 {
+                reg = <2>;
+
+                ipu_di0_disp0: endpoint {
+                        remote-endpoint = <&display_in>;
+                };
+        };
+};
+
+Parallel display support
+========================
+
+Required properties:
+- compatible: Should be "fsl,imx-parallel-display"
+Optional properties:
+- interface_pix_fmt: How this display is connected to the
+  display interface. Currently supported types: "rgb24", "rgb565", "bgr666"
+  and "lvds666".
+- edid: verbatim EDID data block describing attached display.
+- ddc: phandle describing the i2c bus handling the display data
+  channel
+- port: A port node with endpoint definitions as defined in
+  Documentation/devicetree/bindings/media/video-interfaces.txt.
+
+example:
+
+display@di0 {
+        compatible = "fsl,imx-parallel-display";
+        edid = [edid-data];
+        interface-pix-fmt = "rgb24";
+
+        port {
+                display_in: endpoint {
+                        remote-endpoint = <&ipu_di0_disp0>;
+                };
+        };
+};
diff --git a/Documentation/devicetree/bindings/drm/imx/hdmi.txt b/Documentation/devicetree/bindings/drm/imx/hdmi.txt
new file mode 100644
index 000000000000..1b756cf9afb0
--- /dev/null
+++ b/Documentation/devicetree/bindings/drm/imx/hdmi.txt
@@ -0,0 +1,58 @@
+Device-Tree bindings for HDMI Transmitter
+
+HDMI Transmitter
+================
+
+The HDMI Transmitter is a Synopsys DesignWare HDMI 1.4 TX controller IP
+with accompanying PHY IP.
+
+Required properties:
+ - #address-cells : should be <1>
+ - #size-cells : should be <0>
+ - compatible : should be "fsl,imx6q-hdmi" or "fsl,imx6dl-hdmi".
+ - gpr : should be <&gpr>.
+   The phandle points to the iomuxc-gpr region containing the HDMI
+   multiplexer control register.
+ - clocks, clock-names : phandles to the HDMI iahb and isrf clocks, as described
+   in Documentation/devicetree/bindings/clock/clock-bindings.txt and
+   Documentation/devicetree/bindings/clock/imx6q-clock.txt.
+ - port@[0-4]: Up to four port nodes with endpoint definitions as defined in
+   Documentation/devicetree/bindings/media/video-interfaces.txt,
+   corresponding to the four inputs to the HDMI multiplexer.
+
+Optional properties:
+ - ddc-i2c-bus: phandle of an I2C controller used for DDC EDID probing
+
+example:
+
+        gpr: iomuxc-gpr@020e0000 {
+                /* ... */
+        };
+
+        hdmi: hdmi@0120000 {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                compatible = "fsl,imx6q-hdmi";
+                reg = <0x00120000 0x9000>;
+                interrupts = <0 115 0x04>;
+                gpr = <&gpr>;
+                clocks = <&clks 123>, <&clks 124>;
+                clock-names = "iahb", "isfr";
+                ddc-i2c-bus = <&i2c2>;
+
+                port@0 {
+                        reg = <0>;
+
+                        hdmi_mux_0: endpoint {
+                                remote-endpoint = <&ipu1_di0_hdmi>;
+                        };
+                };
+
+                port@1 {
+                        reg = <1>;
+
+                        hdmi_mux_1: endpoint {
+                                remote-endpoint = <&ipu1_di1_hdmi>;
+                        };
+                };
+        };
diff --git a/Documentation/devicetree/bindings/drm/imx/ldb.txt b/Documentation/devicetree/bindings/drm/imx/ldb.txt
new file mode 100644
index 000000000000..443bcb6134d5
--- /dev/null
+++ b/Documentation/devicetree/bindings/drm/imx/ldb.txt
@@ -0,0 +1,122 @@
+Device-Tree bindings for LVDS Display Bridge (ldb)
+
+LVDS Display Bridge
+===================
+
+The LVDS Display Bridge device tree node contains up to two lvds-channel
+nodes describing each of the two LVDS encoder channels of the bridge.
+
+Required properties:
+ - #address-cells : should be <1>
+ - #size-cells : should be <0>
+ - compatible : should be "fsl,imx53-ldb" or "fsl,imx6q-ldb".
+                Both LDB versions are similar, but i.MX6 has an additional
+                multiplexer in the front to select any of the four IPU display
+                interfaces as input for each LVDS channel.
+ - gpr : should be <&gpr> on i.MX53 and i.MX6q.
+         The phandle points to the iomuxc-gpr region containing the LVDS
+         control register.
+- clocks, clock-names : phandles to the LDB divider and selector clocks and to
+                        the display interface selector clocks, as described in
+                        Documentation/devicetree/bindings/clock/clock-bindings.txt
+        The following clocks are expected on i.MX53:
+                "di0_pll" - LDB LVDS channel 0 mux
+                "di1_pll" - LDB LVDS channel 1 mux
+                "di0" - LDB LVDS channel 0 gate
+                "di1" - LDB LVDS channel 1 gate
+                "di0_sel" - IPU1 DI0 mux
+                "di1_sel" - IPU1 DI1 mux
+        On i.MX6q the following additional clocks are needed:
+                "di2_sel" - IPU2 DI0 mux
+                "di3_sel" - IPU2 DI1 mux
+        The needed clock numbers for each are documented in
+        Documentation/devicetree/bindings/clock/imx5-clock.txt, and in
+        Documentation/devicetree/bindings/clock/imx6q-clock.txt.
+
+Optional properties:
+ - pinctrl-names : should be "default" on i.MX53, not used on i.MX6q
+ - pinctrl-0 : a phandle pointing to LVDS pin settings on i.MX53,
+               not used on i.MX6q
+ - fsl,dual-channel : boolean. if it exists, only LVDS channel 0 should
+   be configured - one input will be distributed on both outputs in dual
+   channel mode
+
+LVDS Channel
+============
+
+Each LVDS Channel has to contain a display-timings node that describes the
+video timings for the connected LVDS display. For detailed information, also
+have a look at Documentation/devicetree/bindings/video/display-timing.txt.
+
+Required properties:
+ - reg : should be <0> or <1>
+ - fsl,data-mapping : should be "spwg" or "jeida"
+                      This describes how the color bits are laid out in the
+                      serialized LVDS signal.
+ - fsl,data-width : should be <18> or <24>
+ - port: A port node with endpoint definitions as defined in
+   Documentation/devicetree/bindings/media/video-interfaces.txt.
+   On i.MX5, the internal two-input-multiplexer is used.
+   Due to hardware limitations, only one port (port@[0,1])
+   can be used for each channel (lvds-channel@[0,1], respectively)
+   On i.MX6, there should be four ports (port@[0-3]) that correspond
+   to the four LVDS multiplexer inputs.
+
+example:
+
+gpr: iomuxc-gpr@53fa8000 {
+        /* ... */
+};
+
+ldb: ldb@53fa8008 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        compatible = "fsl,imx53-ldb";
+        gpr = <&gpr>;
+        clocks = <&clks 122>, <&clks 120>,
+                 <&clks 115>, <&clks 116>,
+                 <&clks 123>, <&clks 85>;
+        clock-names = "di0_pll", "di1_pll",
+                      "di0_sel", "di1_sel",
+                      "di0", "di1";
+
+        lvds-channel@0 {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                reg = <0>;
+                fsl,data-mapping = "spwg";
+                fsl,data-width = <24>;
+
+                display-timings {
+                        /* ... */
+                };
+
+                port@0 {
+                        reg = <0>;
+
+                        lvds0_in: endpoint {
+                                remote-endpoint = <&ipu_di0_lvds0>;
+                        };
+                };
+        };
+
+        lvds-channel@1 {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                reg = <1>;
+                fsl,data-mapping = "spwg";
+                fsl,data-width = <24>;
+
+                display-timings {
+                        /* ... */
+                };
+
+                port@1 {
+                        reg = <1>;
+
+                        lvds1_in: endpoint {
+                                remote-endpoint = <&ipu_di1_lvds1>;
+                        };
+                };
+        };
+};