diff options
Diffstat (limited to 'linux-core/drm_modes.c')
| -rw-r--r-- | linux-core/drm_modes.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/linux-core/drm_modes.c b/linux-core/drm_modes.c index 648e85e5..54c25137 100644 --- a/linux-core/drm_modes.c +++ b/linux-core/drm_modes.c @@ -47,7 +47,7 @@ void drm_mode_debug_printmodeline(struct drm_device *dev, struct drm_display_mode *mode) { DRM_DEBUG("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d\n", - mode->mode_id, mode->name, mode->vrefresh / 1000, mode->clock, + mode->mode_id, mode->name, mode->vrefresh, mode->clock, mode->hdisplay, mode->hsync_start, mode->hsync_end, mode->htotal, mode->vdisplay, mode->vsync_start, @@ -144,16 +144,24 @@ EXPORT_SYMBOL(drm_mode_height); * FIXME: why is this needed? * * RETURNS: - * Vertical refresh rate of @mode. + * Vertical refresh rate of @mode x 1000. For precision reasons. */ int drm_mode_vrefresh(struct drm_display_mode *mode) { int refresh = 0; + unsigned int calc_val; if (mode->vrefresh > 0) refresh = mode->vrefresh; else if (mode->htotal > 0 && mode->vtotal > 0) { - refresh = ((mode->clock * 1000) * 1000) / mode->htotal / mode->vtotal; + /* work out vrefresh the value will be x1000 */ + calc_val = (mode->clock * 1000); + + calc_val /= mode->htotal; + calc_val *= 1000; + calc_val /= mode->vtotal; + + refresh = calc_val; if (mode->flags & V_INTERLACE) refresh *= 2; if (mode->flags & V_DBLSCAN) |