tegra: fdt: Add LCD definitions for Tegra

Add LCD definitions and also a proposed binding for LCD displays.

The PWM is as per what will likely be committed to linux-next soon.

The displaymode binding comes from a proposal here:

http://lists.freedesktop.org/archives/dri-devel/2012-July/024875.html

The panel binding is new, and fills a need to specify the panel
timings and other tegra-specific information. Should a binding appear
that allows the pwm to handle this automatically, we can revisit
this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>

diff --git a/arch/arm/dts/tegra20.dtsi b/arch/arm/dts/tegra20.dtsi
index 3221bc9..636ec2c 100644 (file)
--- a/arch/arm/dts/tegra20.dtsi
+++ b/arch/arm/dts/tegra20.dtsi
@@ -218,4 +218,102 @@
                #pwm-cells = <2>;
        };
 
+       host1x {
+               compatible = "nvidia,tegra20-host1x", "simple-bus";
+               reg = <0x50000000 0x00024000>;
+               interrupts = <0 65 0x04   /* mpcore syncpt */
+                             0 67 0x04>; /* mpcore general */
+               status = "disabled";
+
+               #address-cells = <1>;
+               #size-cells = <1>;
+
+               ranges = <0x54000000 0x54000000 0x04000000>;
+
+               /* video-encoding/decoding */
+               mpe {
+                       reg = <0x54040000 0x00040000>;
+                       interrupts = <0 68 0x04>;
+                       status = "disabled";
+               };
+
+               /* video input */
+               vi {
+                       reg = <0x54080000 0x00040000>;
+                       interrupts = <0 69 0x04>;
+                       status = "disabled";
+               };
+
+               /* EPP */
+               epp {
+                       reg = <0x540c0000 0x00040000>;
+                       interrupts = <0 70 0x04>;
+                       status = "disabled";
+               };
+
+               /* ISP */
+               isp {
+                       reg = <0x54100000 0x00040000>;
+                       interrupts = <0 71 0x04>;
+                       status = "disabled";
+               };
+
+               /* 2D engine */
+               gr2d {
+                       reg = <0x54140000 0x00040000>;
+                       interrupts = <0 72 0x04>;
+                       status = "disabled";
+               };
+
+               /* 3D engine */
+               gr3d {
+                       reg = <0x54180000 0x00040000>;
+                       status = "disabled";
+               };
+
+               /* display controllers */
+               dc@54200000 {
+                       compatible = "nvidia,tegra20-dc";
+                       reg = <0x54200000 0x00040000>;
+                       interrupts = <0 73 0x04>;
+                       status = "disabled";
+
+                       rgb {
+                               status = "disabled";
+                       };
+               };
+
+               dc@54240000 {
+                       compatible = "nvidia,tegra20-dc";
+                       reg = <0x54240000 0x00040000>;
+                       interrupts = <0 74 0x04>;
+                       status = "disabled";
+
+                       rgb {
+                               status = "disabled";
+                       };
+               };
+
+               /* outputs */
+               hdmi {
+                       compatible = "nvidia,tegra20-hdmi";
+                       reg = <0x54280000 0x00040000>;
+                       interrupts = <0 75 0x04>;
+                       status = "disabled";
+               };
+
+               tvo {
+                       compatible = "nvidia,tegra20-tvo";
+                       reg = <0x542c0000 0x00040000>;
+                       interrupts = <0 76 0x04>;
+                       status = "disabled";
+               };
+
+               dsi {
+                       compatible = "nvidia,tegra20-dsi";
+                       reg = <0x54300000 0x00040000>;
+                       status = "disabled";
+               };
+       };
+
 };

diff --git a/doc/device-tree-bindings/video/displaymode.txt b/doc/device-tree-bindings/video/displaymode.txt
new file mode 100644 (file)
index 0000000..45ca42d
--- /dev/null
+++ b/doc/device-tree-bindings/video/displaymode.txt
@@ -0,0 +1,42 @@
+videomode bindings
+==================
+
+(from http://lists.freedesktop.org/archives/dri-devel/2012-July/024875.html)
+
+Required properties:
+ - xres, yres: Display resolution
+ - left-margin, right-margin, hsync-len: Horizontal Display timing
+   parameters in pixels
+ - upper-margin, lower-margin, vsync-len: Vertical display timing
+   parameters in lines
+ - clock: display clock in Hz
+
+Optional properties:
+ - width-mm, height-mm: Display dimensions in mm
+ - hsync-active-high (bool): Hsync pulse is active high
+ - vsync-active-high (bool): Vsync pulse is active high
+ - interlaced (bool): This is an interlaced mode
+ - doublescan (bool): This is a doublescan mode
+
+There are different ways of describing a display mode. The devicetree
+representation corresponds to the one used by the Linux Framebuffer
+framework described here in Documentation/fb/framebuffer.txt. This
+representation has been chosen because it's the only format which does
+not allow for inconsistent parameters. Unlike the Framebuffer framework
+the devicetree has the clock in Hz instead of ps.
+
+Example:
+
+       display@0 {
+               /* 1920x1080p24 */
+               clock = <52000000>;
+               xres = <1920>;
+               yres = <1080>;
+               left-margin = <25>;
+               right-margin = <25>;
+               hsync-len = <25>;
+               lower-margin = <2>;
+               upper-margin = <2>;
+               vsync-len = <2>;
+               hsync-active-high;
+       };

diff --git a/doc/device-tree-bindings/video/tegra20-dc.txt b/doc/device-tree-bindings/video/tegra20-dc.txt
new file mode 100644 (file)
index 0000000..4731c3f
--- /dev/null
+++ b/doc/device-tree-bindings/video/tegra20-dc.txt
@@ -0,0 +1,85 @@
+Display Controller
+------------------
+
+(there isn't yet a generic binding in Linux, so this describes what is in
+U-Boot, and may change based on Linux activity)
+
+The device node for a display device is as described in the document
+"Open Firmware Recommended Practice : Universal Serial Bus" with the
+following modifications and additions :
+
+Required properties :
+ - compatible : Should be "nvidia,tegra20-dc"
+
+Required subnode 'rgb' is as follows:
+
+Required properties (rgb) :
+ - nvidia,panel : phandle of LCD panel information
+
+
+The panel node describes the panel itself. This has the properties listed in
+displaymode.txt as well as:
+
+Required properties (panel) :
+ - nvidia,bits-per-pixel: number of bits per pixel (depth)
+ - nvidia,pwm : pwm to use to set display contrast (see tegra20-pwm.txt)
+ - nvidia,panel-timings: 4 cells containing required timings in ms:
+       * delay before asserting panel_vdd
+       * delay between panel_vdd-rise and data-rise
+       * delay between data-rise and backlight_vdd-rise
+       * delay between backlight_vdd and pwm-rise
+       * delay between pwm-rise and backlight_en-rise
+
+Optional GPIO properies all have (phandle, GPIO number, flags):
+ - nvidia,backlight-enable-gpios: backlight enable GPIO
+ - nvidia,lvds-shutdown-gpios: LVDS power shutdown GPIO
+ - nvidia,backlight-vdd-gpios: backlight power GPIO
+ - nvidia,panel-vdd-gpios: panel power GPIO
+
+Example:
+
+host1x {
+       compatible = "nvidia,tegra20-host1x", "simple-bus";
+       reg = <0x50000000 0x00024000>;
+       interrupts = <0 65 0x04   /* mpcore syncpt */
+                       0 67 0x04>; /* mpcore general */
+
+       #address-cells = <1>;
+       #size-cells = <1>;
+       status = "okay";
+
+       ranges = <0x54000000 0x54000000 0x04000000>;
+
+       dc@54200000 {
+               compatible = "nvidia,tegra20-dc";
+               reg = <0x54200000 0x00040000>;
+               interrupts = <0 73 0x04>;
+               status = "okay";
+
+               rgb {
+                       status = "okay";
+                       nvidia,panel = <&lcd_panel>;
+               };
+       };
+};
+
+lcd_panel: panel {
+       /* Seaboard has 1366x768 */
+       clock = <70600000>;
+       xres = <1366>;
+       yres = <768>;
+       left-margin = <58>;
+       right-margin = <58>;
+       hsync-len = <58>;
+       lower-margin = <4>;
+       upper-margin = <4>;
+       vsync-len = <4>;
+       hsync-active-high;
+       nvidia,bits-per-pixel = <16>;
+       nvidia,pwm = <&pwm 2 0>;
+       nvidia,backlight-enable-gpios = <&gpio 28 0>;   /* PD4 */
+       nvidia,lvds-shutdown-gpios = <&gpio 10 0>;      /* PB2 */
+       nvidia,backlight-vdd-gpios = <&gpio 176 0>;     /* PW0 */
+       nvidia,panel-vdd-gpios = <&gpio 22 0>;          /* PC6 */
+       nvidia,panel-timings = <400 4 203 17 15>;
+};