drm: Move drm_format_num_planes() to drm_crtc.c

There will be a need for this function in drm_crtc.c later. This
avoids making drm_crtc.c depend on drm_crtc_helper.c.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index e250eda4e3a8..9dd3ed85547d 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -1026,4 +1026,6 @@ extern int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
 
 extern void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
                                  int *bpp);
+extern int drm_format_num_planes(uint32_t format);
+
 #endif /* __DRM_CRTC_H__ */