*/
int drm_mode_vrefresh(const struct drm_display_mode *mode)
{
- int refresh = 0;
+ unsigned int num, den;
- if (mode->htotal > 0 && mode->vtotal > 0) {
- unsigned int num, den;
+ if (mode->htotal == 0 || mode->vtotal == 0)
+ return 0;
- num = mode->clock * 1000;
- den = mode->htotal * mode->vtotal;
+ num = mode->clock * 1000;
+ den = mode->htotal * mode->vtotal;
- if (mode->flags & DRM_MODE_FLAG_INTERLACE)
- num *= 2;
- if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
- den *= 2;
- if (mode->vscan > 1)
- den *= mode->vscan;
+ if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+ num *= 2;
+ if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
+ den *= 2;
+ if (mode->vscan > 1)
+ den *= mode->vscan;
- refresh = DIV_ROUND_CLOSEST(num, den);
- }
- return refresh;
+ return DIV_ROUND_CLOSEST(num, den);
}
EXPORT_SYMBOL(drm_mode_vrefresh);