NAME
drm_calc_timestamping_constants - calculate vblank timestamp constants
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