diff options
author | Thomas Abraham <thomas.abraham@linaro.org> | 2012-03-30 11:14:40 +0530 |
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committer | Tushar Behera <tushar.behera@linaro.org> | 2013-04-16 13:18:08 +0530 |
commit | 209376dc7a8610ad148a570537279d050a7fb461 (patch) | |
tree | 7d221629711dc49b4c13b5be188dd0ed697386fa /Documentation | |
parent | feab848ac0065e66cfd8b87c3f4d59bb39d38268 (diff) |
video: s3c-fb: Add device tree support
Add device tree based discovery support for Samsung's display controller
framebuffer driver.
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/devicetree/bindings/fb/samsung-fb.txt | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/fb/samsung-fb.txt b/Documentation/devicetree/bindings/fb/samsung-fb.txt new file mode 100644 index 00000000000..612bd9f8327 --- /dev/null +++ b/Documentation/devicetree/bindings/fb/samsung-fb.txt @@ -0,0 +1,148 @@ +* Samsung Display Controller Framebuffer Controller + +The display controller is used to transfer image data from memory to a +external display device such as an RGB interface LCD panel. It supports +various color formats such as rgb and yuv. It also supports multiple window +overlays. + +Required properties: + + - compatible: should be one of the following + - samsung,exynos4210-fimd: for fimd compatible with Exynos4210 fimd + - samsung,s5pv210-fimd: for fimd compatible with s5pv210 fimd + + - reg: physical base address of the controller and length of memory + mapped region. + + - interrupts: Three interrupts should be specified. The format of the + interrupt specifier depends on the interrupt controller. The interrupts + should be specified in the following order. + - VSYNC (Video Frame) interrupt + - Video FIFO level interrupt + - FIMD System Interrupt + + - gpios: The gpios used to interface with the external LCD panel. For a + panel with rgb interface, the gpio interface consists of video data + lines, HSYNC, VSYNC, Pixel Clock and Data Enable. The gpio's used for + these interface lines can be listed under this property in any order. + + - samsung,fimd-display: The fimd controller is interfaced with the a + display device such as a lcd panel. This property should specify the + phandle of the display device node. For a display device node that + represents a RGB type display interface, it is expected to specify the + video interface timing using the following properties. + + - lcd-htiming: Specifies the horizontal timing for the overlay. The + horizontal timing includes four parameters in the following order. + + - horizontal back porch (in number of lcd clocks) + - horizontal front porch (in number of lcd clocks) + - hsync pulse width (in number of lcd clocks) + - Display panels X resolution. + + - lcd-vtiming: Specifies the vertical timing for the overlay. The + vertical timing includes four parameters in the following order. + + - vertical back porch (in number of lcd lines) + - vertical front porch (in number of lcd lines) + - vsync pulse width (in number of lcd clocks) + - Y resolution. + + - Overlay/Windows: Multiple overlays/windows can be specified as child + nodes. Each window should have the following properties (optional + window properties are marked as 'optional'). + + - samsung,fimd-win-id: Specifies the window number of the fimd controller. + + - samsung,fimd-win-bpp: Specifies the bits per pixel. Two values should + be specified in the following order. + - default-bpp: bpp supported by the overlay. + - max-bpp: maximum required bpp for the overlay. + + - samsung,fimd-win-res: (OPTIONAL) Specifies the window resolution in + pixels. The resolution contains the X and Y pixel values with X being + specified first. If this property is not specified, the window + resolution is set to be equal to the display panel resolution. + + - samsung,fimd-win-virtres: (OPTIONAL) Specifies the resolution of the + virtual frame buffer for the window. The resolution contains the X + and Y resolution in pixels with value of X being the specified first. + +Optional properties: + + - samsung,fimd-vidout-rgb: Video output format is RGB. + - samsung,fimd-inv-hsync: invert hsync pulse polarity. + - samsung,fimd-inv-vsync: invert vsync pulse polarity. + - samsung,fimd-inv-vclk: invert video clock polarity. + - samsung,fimd-inv-vden: invert video enable signal polarity. + - samsung,fimd-frame-rate: Number of video frames per second. + +Example: + + The following is an example for the fimd framebuffer controller is split + into two portions. The SoC specific portion can be specified in the SoC + specific dts file. The board specific portion can be specified in the + board specific dts file. + + - SoC Specific portion + + fimd@11C00000 { + compatible = "samsung,exynos4210-fimd"; + interrupt-parent = <&combiner>; + reg = <0x11C00000 0x8000>; + interrupts = <11 1>, <11 0>, <11 2>; + }; + + - Board Specific portion + + fimd@11C00000 { + samsung,fimd-display = <&lcd_fimd0>; + samsung,fimd-vidout-rgb; + samsung,fimd-inv-hsync; + samsung,fimd-inv-vsync; + samsung,fimd-inv-vclk; + samsung,fimd-frame-rate = <60>; + + gpios = <&gpf0 0 2 0 0>, + <&gpf0 1 2 0 0>, + <&gpf0 2 2 0 0>, + <&gpf0 3 2 0 0>, + <&gpf0 4 2 0 0>, + <&gpf0 5 2 0 0>, + <&gpf0 6 2 0 0>, + <&gpf0 7 2 0 0>, + <&gpf1 0 2 0 0>, + <&gpf1 1 2 0 0>, + <&gpf1 2 2 0 0>, + <&gpf1 3 2 0 0>, + <&gpf1 4 2 0 0>, + <&gpf1 5 2 0 0>, + <&gpf1 6 2 0 0>, + <&gpf1 7 2 0 0>, + <&gpf2 0 2 0 0>, + <&gpf2 1 2 0 0>, + <&gpf2 2 2 0 0>, + <&gpf2 3 2 0 0>, + <&gpf2 4 2 0 0>, + <&gpf2 5 2 0 0>, + <&gpf2 6 2 0 0>, + <&gpf2 7 2 0 0>, + <&gpf3 0 2 0 0>, + <&gpf3 1 2 0 0>, + <&gpf3 2 2 0 0>, + <&gpf3 3 2 0 0>; + + window0 { + samsung,fimd-win-id = <0>; + samsung,fimd-win-bpp = <32 24>; + samsung,fimd-win-res = <512 300>; + samsung,fimd-win-vres = <1024 600>; + }; + + window1 { + samsung,fimd-win-id = <1>; + samsung,fimd-win-bpp = <32 24>; + samsung,fimd-win-res = <1024 200>; + samsung,fimd-win-vres = <1024 600>; + }; + }; |