drm_rect_calc_vscale (9)

int drm_rect_calc_vscale(const struct drm_rect * src, const struct drm_rect * dst, int min_vscale, int max_vscale);

src

source window rectangle

dst

destination window rectangle

min_vscale

minimum allowed vertical scaling factor

max_vscale

maximum allowed vertical scaling factor

Calculate the vertical scaling factor as (src height) / (dst height).

The vertical scaling factor, or errno of out of limits.

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