drm: Add drm_mode_copy()

Add a helper function to copy a display mode. Use it in
drm_mode_duplicate() and nouveau mode_fixup hooks.

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

diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index c2d32f2..3af6472 100644 (file)
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -715,6 +715,27 @@ EXPORT_SYMBOL(drm_mode_set_crtcinfo);
 
 
 /**
+ * drm_mode_copy - copy the mode
+ * @dst: mode to overwrite
+ * @src: mode to copy
+ *
+ * LOCKING:
+ * None.
+ *
+ * Copy an existing mode into another mode, preserving the object id
+ * of the destination mode.
+ */
+void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src)
+{
+       int id = dst->base.id;
+
+       *dst = *src;
+       dst->base.id = id;
+       INIT_LIST_HEAD(&dst->head);
+}
+EXPORT_SYMBOL(drm_mode_copy);
+
+/**
  * drm_mode_duplicate - allocate and duplicate an existing mode
  * @m: mode to duplicate
  *
@@ -728,16 +749,13 @@ struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
                                            const struct drm_display_mode *mode)
 {
        struct drm_display_mode *nmode;
-       int new_id;
 
        nmode = drm_mode_create(dev);
        if (!nmode)
                return NULL;
 
-       new_id = nmode->base.id;
-       *nmode = *mode;
-       nmode->base.id = new_id;
-       INIT_LIST_HEAD(&nmode->head);
+       drm_mode_copy(nmode, mode);
+
        return nmode;
 }
 EXPORT_SYMBOL(drm_mode_duplicate);

diff --git a/drivers/gpu/drm/nouveau/nv50_dac.c b/drivers/gpu/drm/nouveau/nv50_dac.c
index 808f3ec..8ae0dd2 100644 (file)
--- a/drivers/gpu/drm/nouveau/nv50_dac.c
+++ b/drivers/gpu/drm/nouveau/nv50_dac.c
@@ -190,11 +190,8 @@ nv50_dac_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode,
        }
 
        if (connector->scaling_mode != DRM_MODE_SCALE_NONE &&
-            connector->native_mode) {
-               int id = adjusted_mode->base.id;
-               *adjusted_mode = *connector->native_mode;
-               adjusted_mode->base.id = id;
-       }
+            connector->native_mode)
+               drm_mode_copy(adjusted_mode, connector->native_mode);
 
        return true;
 }

diff --git a/drivers/gpu/drm/nouveau/nv50_sor.c b/drivers/gpu/drm/nouveau/nv50_sor.c
index c25c593..57b8707 100644 (file)
--- a/drivers/gpu/drm/nouveau/nv50_sor.c
+++ b/drivers/gpu/drm/nouveau/nv50_sor.c
@@ -160,11 +160,8 @@ nv50_sor_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode,
        }
 
        if (connector->scaling_mode != DRM_MODE_SCALE_NONE &&
-            connector->native_mode) {
-               int id = adjusted_mode->base.id;
-               *adjusted_mode = *connector->native_mode;
-               adjusted_mode->base.id = id;
-       }
+            connector->native_mode)
+               drm_mode_copy(adjusted_mode, connector->native_mode);
 
        return true;
 }

diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 28026e5..0261d7e 100644 (file)
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -791,6 +791,7 @@ extern struct edid *drm_get_edid(struct drm_connector *connector,
 extern int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid);
 extern void drm_mode_probed_add(struct drm_connector *connector, struct drm_display_mode *mode);
 extern void drm_mode_remove(struct drm_connector *connector, struct drm_display_mode *mode);
+extern void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src);
 extern struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
                                                   const struct drm_display_mode *mode);
 extern void drm_mode_debug_printmodeline(struct drm_display_mode *mode);