Merge tag 'drm-intel-next-2014-12-19' of git://anongit.freedesktop.org/drm-intel...

[cascardo/linux.git] / drivers / gpu / drm / drm_crtc.c

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 7e4acad..7c1786d 100644 (file)
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -2658,6 +2658,27 @@ int drm_mode_set_config_internal(struct drm_mode_set *set)
 }
 EXPORT_SYMBOL(drm_mode_set_config_internal);
 
+/**
+ * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode
+ * @mode: mode to query
+ * @hdisplay: hdisplay value to fill in
+ * @vdisplay: vdisplay value to fill in
+ *
+ * The vdisplay value will be doubled if the specified mode is a stereo mode of
+ * the appropriate layout.
+ */
+void drm_crtc_get_hv_timing(const struct drm_display_mode *mode,
+                           int *hdisplay, int *vdisplay)
+{
+       struct drm_display_mode adjusted;
+
+       drm_mode_copy(&adjusted, mode);
+       drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY);
+       *hdisplay = adjusted.crtc_hdisplay;
+       *vdisplay = adjusted.crtc_vdisplay;
+}
+EXPORT_SYMBOL(drm_crtc_get_hv_timing);
+
 /**
  * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
  *     CRTC viewport
@@ -2675,16 +2696,7 @@ int drm_crtc_check_viewport(const struct drm_crtc *crtc,
 {
        int hdisplay, vdisplay;
 
-       hdisplay = mode->hdisplay;
-       vdisplay = mode->vdisplay;
-
-       if (drm_mode_is_stereo(mode)) {
-               struct drm_display_mode adjusted = *mode;
-
-               drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE);
-               hdisplay = adjusted.crtc_hdisplay;
-               vdisplay = adjusted.crtc_vdisplay;
-       }
+       drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay);
 
        if (crtc->invert_dimensions)
                swap(hdisplay, vdisplay);