drm: Add checks for atomic_[duplicate/destroy]_state with atomic drivers

This patch add checks for atomic_[duplicate/destroy]_state of
drm_[connector/crtc/plane]_funcs for atomic drivers in the relevant
drm_*_init functions since these callback are mandatory for atomic drivers.

Update the kerneldoc comments for those callbacks.

Signed-off-by: Haneen Mohammed <hamohammed.sa@gmail.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20180525012555.GA8448@haneen-vb

diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 002b244..549b895 100644 (file)
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -195,6 +195,10 @@ int drm_connector_init(struct drm_device *dev,
        struct ida *connector_ida =
                &drm_connector_enum_list[connector_type].ida;
 
+       WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
+               (!funcs->atomic_destroy_state ||
+                !funcs->atomic_duplicate_state));
+
        ret = __drm_mode_object_add(dev, &connector->base,
                                    DRM_MODE_OBJECT_CONNECTOR,
                                    false, drm_connector_free);

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 163d82a..f45e7a8 100644 (file)
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -286,6 +286,10 @@ int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
        if (WARN_ON(config->num_crtc >= 32))
                return -EINVAL;
 
+       WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
+               (!funcs->atomic_destroy_state ||
+                !funcs->atomic_duplicate_state));
+
        crtc->dev = dev;
        crtc->funcs = funcs;
 

diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index 534b579..df0b4eb 100644 (file)
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -177,6 +177,10 @@ int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
        if (WARN_ON(config->num_total_plane >= 32))
                return -EINVAL;
 
+       WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
+               (!funcs->atomic_destroy_state ||
+                !funcs->atomic_duplicate_state));
+
        ret = drm_mode_object_add(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
        if (ret)
                return ret;

diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index ee4c482..c5797c2 100644 (file)
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -616,6 +616,8 @@ struct drm_connector_funcs {
         * cleaned up by calling the @atomic_destroy_state hook in this
         * structure.
         *
+        * This callback is mandatory for atomic drivers.
+        *
         * Atomic drivers which don't subclass &struct drm_connector_state should use
         * drm_atomic_helper_connector_duplicate_state(). Drivers that subclass the
         * state structure to extend it with driver-private state should use
@@ -642,6 +644,8 @@ struct drm_connector_funcs {
         *
         * Destroy a state duplicated with @atomic_duplicate_state and release
         * or unreference all resources it references
+        *
+        * This callback is mandatory for atomic drivers.
         */
        void (*atomic_destroy_state)(struct drm_connector *connector,
                                     struct drm_connector_state *state);

diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 5cf7ade..23eddbc 100644 (file)
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -506,6 +506,8 @@ struct drm_crtc_funcs {
         * cleaned up by calling the @atomic_destroy_state hook in this
         * structure.
         *
+        * This callback is mandatory for atomic drivers.
+        *
         * Atomic drivers which don't subclass &struct drm_crtc_state should use
         * drm_atomic_helper_crtc_duplicate_state(). Drivers that subclass the
         * state structure to extend it with driver-private state should use
@@ -532,6 +534,8 @@ struct drm_crtc_funcs {
         *
         * Destroy a state duplicated with @atomic_duplicate_state and release
         * or unreference all resources it references
+        *
+        * This callback is mandatory for atomic drivers.
         */
        void (*atomic_destroy_state)(struct drm_crtc *crtc,
                                     struct drm_crtc_state *state);

diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h
index 14b1607..7d4d6c7 100644 (file)
--- a/include/drm/drm_plane.h
+++ b/include/drm/drm_plane.h
@@ -288,6 +288,8 @@ struct drm_plane_funcs {
         * cleaned up by calling the @atomic_destroy_state hook in this
         * structure.
         *
+        * This callback is mandatory for atomic drivers.
+        *
         * Atomic drivers which don't subclass &struct drm_plane_state should use
         * drm_atomic_helper_plane_duplicate_state(). Drivers that subclass the
         * state structure to extend it with driver-private state should use
@@ -314,6 +316,8 @@ struct drm_plane_funcs {
         *
         * Destroy a state duplicated with @atomic_duplicate_state and release
         * or unreference all resources it references
+        *
+        * This callback is mandatory for atomic drivers.
         */
        void (*atomic_destroy_state)(struct drm_plane *plane,
                                     struct drm_plane_state *state);