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Diffstat (limited to 'include/drm/drm_atomic_helper.h')
-rw-r--r--include/drm/drm_atomic_helper.h43
1 files changed, 43 insertions, 0 deletions
diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
index f956b413311e..8039d54a7441 100644
--- a/include/drm/drm_atomic_helper.h
+++ b/include/drm/drm_atomic_helper.h
@@ -30,6 +30,10 @@
#include <drm/drm_crtc.h>
+int drm_atomic_helper_check_modeset(struct drm_device *dev,
+ struct drm_atomic_state *state);
+int drm_atomic_helper_check_planes(struct drm_device *dev,
+ struct drm_atomic_state *state);
int drm_atomic_helper_check(struct drm_device *dev,
struct drm_atomic_state *state);
int drm_atomic_helper_commit(struct drm_device *dev,
@@ -78,6 +82,8 @@ int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event,
uint32_t flags);
+void drm_atomic_helper_connector_dpms(struct drm_connector *connector,
+ int mode);
/* default implementations for state handling */
void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);
@@ -123,4 +129,41 @@ void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
#define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)
+/*
+ * drm_atomic_plane_disabling - check whether a plane is being disabled
+ * @plane: plane object
+ * @old_state: previous atomic state
+ *
+ * Checks the atomic state of a plane to determine whether it's being disabled
+ * or not. This also WARNs if it detects an invalid state (both CRTC and FB
+ * need to either both be NULL or both be non-NULL).
+ *
+ * RETURNS:
+ * True if the plane is being disabled, false otherwise.
+ */
+static inline bool
+drm_atomic_plane_disabling(struct drm_plane *plane,
+ struct drm_plane_state *old_state)
+{
+ /*
+ * When disabling a plane, CRTC and FB should always be NULL together.
+ * Anything else should be considered a bug in the atomic core, so we
+ * gently warn about it.
+ */
+ WARN_ON((plane->state->crtc == NULL && plane->state->fb != NULL) ||
+ (plane->state->crtc != NULL && plane->state->fb == NULL));
+
+ /*
+ * When using the transitional helpers, old_state may be NULL. If so,
+ * we know nothing about the current state and have to assume that it
+ * might be enabled.
+ *
+ * When using the atomic helpers, old_state won't be NULL. Therefore
+ * this check assumes that either the driver will have reconstructed
+ * the correct state in ->reset() or that the driver will have taken
+ * appropriate measures to disable all planes.
+ */
+ return (!old_state || old_state->crtc) && !plane->state->crtc;
+}
+
#endif /* DRM_ATOMIC_HELPER_H_ */