drm_cvt_mode

drm_cvt_mode
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Name

drm_cvt_mode — create a modeline based on the CVT algorithm

Synopsis

`struct drm_display_mode * drm_cvt_mode (`	struct drm_device * `dev`,
	int `hdisplay`,
	int `vdisplay`,
	int `vrefresh`,
	bool `reduced`,
	bool `interlaced`,
	bool `margins)`;

Arguments

dev: drm device
hdisplay: hdisplay size
vdisplay: vdisplay size
vrefresh: vrefresh rate
reduced: whether to use reduced blanking
interlaced: whether to compute an interlaced mode
margins: whether to add margins (borders)

Description

This function is called to generate the modeline based on CVT algorithm according to the hdisplay, vdisplay, vrefresh. It is based from the VESA(TM) Coordinated Video Timing Generator by Graham Loveridge April 9, 2003 available at

http

//www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls

And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. What I have done is to translate it by using integer calculation.

Returns

The modeline based on the CVT algorithm stored in a drm_display_mode object. The display mode object is allocated with drm_mode_create. Returns NULL when no mode could be allocated.

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