SYNOPSIS

void drm_calc_timestamping_constants(struct drm_crtc * crtc, const struct drm_display_mode * mode);

ARGUMENTS

crtc

drm_crtc whose timestamp constants should be updated.

mode

display mode containing the scanout timings

DESCRIPTION

Calculate and store various constants which are later needed by vblank and swap-completion timestamping, e.g, by drm_calc_vbltimestamp_from_scanoutpos. They are derived from CRTC's true scanout timing, so they take things like panel scaling or other adjustments into account.

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