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eefe3e598e
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>
43 lines
1.3 KiB
Plaintext
43 lines
1.3 KiB
Plaintext
videomode bindings
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==================
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(from http://lists.freedesktop.org/archives/dri-devel/2012-July/024875.html)
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Required properties:
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- xres, yres: Display resolution
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- left-margin, right-margin, hsync-len: Horizontal Display timing
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parameters in pixels
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- upper-margin, lower-margin, vsync-len: Vertical display timing
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parameters in lines
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- clock: display clock in Hz
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Optional properties:
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- width-mm, height-mm: Display dimensions in mm
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- hsync-active-high (bool): Hsync pulse is active high
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- vsync-active-high (bool): Vsync pulse is active high
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- interlaced (bool): This is an interlaced mode
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- doublescan (bool): This is a doublescan mode
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There are different ways of describing a display mode. The devicetree
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representation corresponds to the one used by the Linux Framebuffer
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framework described here in Documentation/fb/framebuffer.txt. This
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representation has been chosen because it's the only format which does
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not allow for inconsistent parameters. Unlike the Framebuffer framework
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the devicetree has the clock in Hz instead of ps.
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Example:
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display@0 {
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/* 1920x1080p24 */
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clock = <52000000>;
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xres = <1920>;
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yres = <1080>;
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left-margin = <25>;
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right-margin = <25>;
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hsync-len = <25>;
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lower-margin = <2>;
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upper-margin = <2>;
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vsync-len = <2>;
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hsync-active-high;
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};
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