drm: add drm_set_preferred_mode

commit 3cf70dafd7bbbc91df0a9ecb081d46f9f3d867f6 upstream.

New helper function to set the preferred video mode.  Can be called
after drm_add_modes_noedid if you don't want the largest supported
video mode be used by default.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index d0d3eae05a1a8acdfe46bfac2270b96cbaa1a5e2..1cb50268a224575d41a3ad96ebf0ac2bccd25cbb 100644 (file)
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -3296,6 +3296,19 @@ int drm_add_modes_noedid(struct drm_connector *connector,
 }
 EXPORT_SYMBOL(drm_add_modes_noedid);
 
+void drm_set_preferred_mode(struct drm_connector *connector,
+                          int hpref, int vpref)
+{
+       struct drm_display_mode *mode;
+
+       list_for_each_entry(mode, &connector->probed_modes, head) {
+               if (drm_mode_width(mode)  == hpref &&
+                   drm_mode_height(mode) == vpref)
+                       mode->type |= DRM_MODE_TYPE_PREFERRED;
+       }
+}
+EXPORT_SYMBOL(drm_set_preferred_mode);
+
 /**
  * drm_hdmi_avi_infoframe_from_display_mode() - fill an HDMI AVI infoframe with
  *                                              data from a DRM display mode

diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 24f499569a2f70480d87dca321c222c50755190d..ec5d737f93c598a95ac13c04674e2b42aee6c7e6 100644 (file)
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -1108,6 +1108,8 @@ extern struct drm_display_mode *drm_gtf_mode_complex(struct drm_device *dev,
                                int GTF_2C, int GTF_K, int GTF_2J);
 extern int drm_add_modes_noedid(struct drm_connector *connector,
                                int hdisplay, int vdisplay);
+extern void drm_set_preferred_mode(struct drm_connector *connector,
+                                  int hpref, int vpref);
 
 extern int drm_edid_header_is_valid(const u8 *raw_edid);
 extern bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid);