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.
AUTHORS
Jesse Barnes <[email protected]>
Intel Corporation,
- Initial version
Laurent Pinchart <[email protected]>
Ideas on board SPRL,
- Driver internals
Daniel Vetter <[email protected]>
Intel Corporation,
- Contributions all over the place
Lukas Wunner <[email protected]>
- vga_switcheroo documentation
COPYRIGHT