Merge tag 'platform-drivers-x86-v4.1-1' of git://git.infradead.org/users/dvhart/linux...

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / drm_atomic_helper.c

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index a2fb0d45217ad3f98ccabf6653d51212dee09112..1d2ca52530d5f3148fec55d72d22c79f2eaa8949 100644 (file)
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -1965,6 +1965,26 @@ void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc)
 }
 EXPORT_SYMBOL(drm_atomic_helper_crtc_reset);
 
+/**
+ * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state
+ * @crtc: CRTC object
+ * @state: atomic CRTC state
+ *
+ * Copies atomic state from a CRTC's current state and resets inferred values.
+ * This is useful for drivers that subclass the CRTC state.
+ */
+void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
+                                             struct drm_crtc_state *state)
+{
+       memcpy(state, crtc->state, sizeof(*state));
+
+       state->mode_changed = false;
+       state->active_changed = false;
+       state->planes_changed = false;
+       state->event = NULL;
+}
+EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state);
+
 /**
  * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook
  * @crtc: drm CRTC
@@ -1980,19 +2000,34 @@ drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc)
        if (WARN_ON(!crtc->state))
                return NULL;
 
-       state = kmemdup(crtc->state, sizeof(*crtc->state), GFP_KERNEL);
-
-       if (state) {
-               state->mode_changed = false;
-               state->active_changed = false;
-               state->planes_changed = false;
-               state->event = NULL;
-       }
+       state = kmalloc(sizeof(*state), GFP_KERNEL);
+       if (state)
+               __drm_atomic_helper_crtc_duplicate_state(crtc, state);
 
        return state;
 }
 EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state);
 
+/**
+ * __drm_atomic_helper_crtc_destroy_state - release CRTC state
+ * @crtc: CRTC object
+ * @state: CRTC state object to release
+ *
+ * Releases all resources stored in the CRTC state without actually freeing
+ * the memory of the CRTC state. This is useful for drivers that subclass the
+ * CRTC state.
+ */
+void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
+                                           struct drm_crtc_state *state)
+{
+       /*
+        * This is currently a placeholder so that drivers that subclass the
+        * state will automatically do the right thing if code is ever added
+        * to this function.
+        */
+}
+EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state);
+
 /**
  * drm_atomic_helper_crtc_destroy_state - default state destroy hook
  * @crtc: drm CRTC
@@ -2004,6 +2039,7 @@ EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state);
 void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
                                          struct drm_crtc_state *state)
 {
+       __drm_atomic_helper_crtc_destroy_state(crtc, state);
        kfree(state);
 }
 EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state);
@@ -2028,6 +2064,24 @@ void drm_atomic_helper_plane_reset(struct drm_plane *plane)
 }
 EXPORT_SYMBOL(drm_atomic_helper_plane_reset);
 
+/**
+ * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state
+ * @plane: plane object
+ * @state: atomic plane state
+ *
+ * Copies atomic state from a plane's current state. This is useful for
+ * drivers that subclass the plane state.
+ */
+void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
+                                              struct drm_plane_state *state)
+{
+       memcpy(state, plane->state, sizeof(*state));
+
+       if (state->fb)
+               drm_framebuffer_reference(state->fb);
+}
+EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state);
+
 /**
  * drm_atomic_helper_plane_duplicate_state - default state duplicate hook
  * @plane: drm plane
@@ -2043,15 +2097,31 @@ drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane)
        if (WARN_ON(!plane->state))
                return NULL;
 
-       state = kmemdup(plane->state, sizeof(*plane->state), GFP_KERNEL);
-
-       if (state && state->fb)
-               drm_framebuffer_reference(state->fb);
+       state = kmalloc(sizeof(*state), GFP_KERNEL);
+       if (state)
+               __drm_atomic_helper_plane_duplicate_state(plane, state);
 
        return state;
 }
 EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state);
 
+/**
+ * __drm_atomic_helper_plane_destroy_state - release plane state
+ * @plane: plane object
+ * @state: plane state object to release
+ *
+ * Releases all resources stored in the plane state without actually freeing
+ * the memory of the plane state. This is useful for drivers that subclass the
+ * plane state.
+ */
+void __drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
+                                            struct drm_plane_state *state)
+{
+       if (state->fb)
+               drm_framebuffer_unreference(state->fb);
+}
+EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state);
+
 /**
  * drm_atomic_helper_plane_destroy_state - default state destroy hook
  * @plane: drm plane
@@ -2063,9 +2133,7 @@ EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state);
 void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
                                           struct drm_plane_state *state)
 {
-       if (state->fb)
-               drm_framebuffer_unreference(state->fb);
-
+       __drm_atomic_helper_plane_destroy_state(plane, state);
        kfree(state);
 }
 EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state);
@@ -2088,6 +2156,22 @@ void drm_atomic_helper_connector_reset(struct drm_connector *connector)
 }
 EXPORT_SYMBOL(drm_atomic_helper_connector_reset);
 
+/**
+ * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state
+ * @connector: connector object
+ * @state: atomic connector state
+ *
+ * Copies atomic state from a connector's current state. This is useful for
+ * drivers that subclass the connector state.
+ */
+void
+__drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
+                                           struct drm_connector_state *state)
+{
+       memcpy(state, connector->state, sizeof(*state));
+}
+EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state);
+
 /**
  * drm_atomic_helper_connector_duplicate_state - default state duplicate hook
  * @connector: drm connector
@@ -2098,13 +2182,40 @@ EXPORT_SYMBOL(drm_atomic_helper_connector_reset);
 struct drm_connector_state *
 drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector)
 {
+       struct drm_connector_state *state;
+
        if (WARN_ON(!connector->state))
                return NULL;
 
-       return kmemdup(connector->state, sizeof(*connector->state), GFP_KERNEL);
+       state = kmalloc(sizeof(*state), GFP_KERNEL);
+       if (state)
+               __drm_atomic_helper_connector_duplicate_state(connector, state);
+
+       return state;
 }
 EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state);
 
+/**
+ * __drm_atomic_helper_connector_destroy_state - release connector state
+ * @connector: connector object
+ * @state: connector state object to release
+ *
+ * Releases all resources stored in the connector state without actually
+ * freeing the memory of the connector state. This is useful for drivers that
+ * subclass the connector state.
+ */
+void
+__drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
+                                           struct drm_connector_state *state)
+{
+       /*
+        * This is currently a placeholder so that drivers that subclass the
+        * state will automatically do the right thing if code is ever added
+        * to this function.
+        */
+}
+EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state);
+
 /**
  * drm_atomic_helper_connector_destroy_state - default state destroy hook
  * @connector: drm connector
@@ -2116,6 +2227,7 @@ EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state);
 void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
                                          struct drm_connector_state *state)
 {
+       __drm_atomic_helper_connector_destroy_state(connector, state);
        kfree(state);
 }
 EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state);