* Freescale MXS LCD Interface (LCDIF)

New bindings:
=============
Required properties:
- compatible:	Should be "fsl,imx23-lcdif" for i.MX23.
		Should be "fsl,imx28-lcdif" for i.MX28.
		Should be "fsl,imx6sx-lcdif" for i.MX6SX.
- reg:		Address and length of the register set for LCDIF
- interrupts:	Should contain LCDIF interrupt
- clocks:	A list of phandle + clock-specifier pairs, one for each
		entry in 'clock-names'.
- clock-names:	A list of clock names. For MXSFB it should contain:
    - "pix" for the LCDIF block clock
    - (MX6SX-only) "axi", "disp_axi" for the bus interface clock
    - (MX8-only) "video_pll, "osc_25", "osc_27" for the VIDEO_PLL,
      OSC_25M and OSC_27M clocks

Required sub-nodes:
  - port: The connection to an encoder chip.

Optional properties:
- max-res:	an array with a maximum of two integers, representing the
		maximum supported resolution, in the form of
		<maxX>, <maxY>; if one of the item is <0>, the default
		driver-defined maximum resolution for that axis is used

Example:

	lcdif1: display-controller@2220000 {
		compatible = "fsl,imx6sx-lcdif", "fsl,imx28-lcdif";
		reg = <0x02220000 0x4000>;
		interrupts = <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>;
		clocks = <&clks IMX6SX_CLK_LCDIF1_PIX>,
			 <&clks IMX6SX_CLK_LCDIF_APB>,
			 <&clks IMX6SX_CLK_DISPLAY_AXI>;
		clock-names = "pix", "axi", "disp_axi";

		port {
			parallel_out: endpoint {
				remote-endpoint = <&panel_in_parallel>;
			};
		};
	};

Deprecated bindings:
====================
Required properties:
- compatible:	Should be "fsl,imx23-lcdif" for i.MX23.
		Should be "fsl,imx28-lcdif" for i.MX28.
- reg:		Address and length of the register set for LCDIF
- interrupts:	Should contain LCDIF interrupts
- display:	phandle to display node (see below for details)

Optional properties:
- disp-dev: Display device driver name
- disp-videomode: Display device video mode name; this is used if the panel
  supports multiple video modes, in order to chose the right one (see below for
  examples)

* display node

Required properties:
- bits-per-pixel:	<16> for RGB565, <32> for RGB888/666.
- bus-width:		number of data lines.  Could be <8>, <16>, <18> or <24>.

Required sub-node:
- display-timings:	Refer to binding doc display-timing.txt for details.

Examples:

lcdif@80030000 {
	compatible = "fsl,imx28-lcdif";
	reg = <0x80030000 2000>;
	interrupts = <38 86>;

	display: display {
		bits-per-pixel = <32>;
		bus-width = <24>;

		display-timings {
			native-mode = <&timing0>;
			timing0: timing0 {
				clock-frequency = <33500000>;
				hactive = <800>;
				vactive = <480>;
				hfront-porch = <164>;
				hback-porch = <89>;
				hsync-len = <10>;
				vback-porch = <23>;
				vfront-porch = <10>;
				vsync-len = <10>;
				hsync-active = <0>;
				vsync-active = <0>;
				de-active = <1>;
				pixelclk-active = <0>;
			};
		};
	};
};

Examples - optional properties:

Snippet from imx7d-sdb-mipi-dsi.dts:

&lcdif {
	disp-dev = "mipi_dsi_samsung";
	disp-videomode = "TRUULY-WVGA-SYNC-LOW";
};

&mipi_dsi {
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_mipi_dsi_reset>;
	lcd_panel = "TRULY-WVGA-TFT3P5581E";
	resets = <&mipi_dsi_reset>;
	status = "okay";
};

In the above example, the panel supports 2 video modes (snippet from
drivers/video/fbdev/mxc/mxcfb_hx8363_wvga.c):

#define ACTIVE_HIGH_NAME	"TRUULY-WVGA-SYNC-HIGH"
#define ACTIVE_LOW_NAME		"TRUULY-WVGA-SYNC-LOW"

static struct fb_videomode truly_lcd_modedb[] = {
	{
		ACTIVE_HIGH_NAME, 50, 480, 854, 41042,
		40, 60,
		3, 3,
		8, 4,
		0x0,
		FB_VMODE_NONINTERLACED,
		0,
	}, {
		ACTIVE_LOW_NAME, 50, 480, 854, 41042,
		40, 60,
		3, 3,
		8, 4,
		FB_SYNC_OE_LOW_ACT,
		FB_VMODE_NONINTERLACED,
		0,
	},
};