Initial import

1 files changed, 183 insertions, 0 deletions

diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
new file mode 100644
index 000000000..d665781eb
--- /dev/null
+++ b/include/drm/drm_atomic_helper.h
@@ -0,0 +1,183 @@
+/*
+ * Copyright (C) 2014 Red Hat
+ * Copyright (C) 2014 Intel Corp.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ * Rob Clark <robdclark@gmail.com>
+ * Daniel Vetter <daniel.vetter@ffwll.ch>
+ */
+
+#ifndef DRM_ATOMIC_HELPER_H_
+#define DRM_ATOMIC_HELPER_H_
+
+#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,
+			     struct drm_atomic_state *state,
+			     bool async);
+
+void drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
+					struct drm_atomic_state *old_state);
+
+void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
+					       struct drm_atomic_state *state);
+void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
+					  struct drm_atomic_state *old_state);
+
+int drm_atomic_helper_prepare_planes(struct drm_device *dev,
+				     struct drm_atomic_state *state);
+void drm_atomic_helper_commit_planes(struct drm_device *dev,
+				     struct drm_atomic_state *state);
+void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
+				      struct drm_atomic_state *old_state);
+
+void drm_atomic_helper_swap_state(struct drm_device *dev,
+				  struct drm_atomic_state *state);
+
+/* implementations for legacy interfaces */
+int drm_atomic_helper_update_plane(struct drm_plane *plane,
+				   struct drm_crtc *crtc,
+				   struct drm_framebuffer *fb,
+				   int crtc_x, int crtc_y,
+				   unsigned int crtc_w, unsigned int crtc_h,
+				   uint32_t src_x, uint32_t src_y,
+				   uint32_t src_w, uint32_t src_h);
+int drm_atomic_helper_disable_plane(struct drm_plane *plane);
+int drm_atomic_helper_set_config(struct drm_mode_set *set);
+
+int drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc,
+					struct drm_property *property,
+					uint64_t val);
+int drm_atomic_helper_plane_set_property(struct drm_plane *plane,
+					struct drm_property *property,
+					uint64_t val);
+int drm_atomic_helper_connector_set_property(struct drm_connector *connector,
+					struct drm_property *property,
+					uint64_t val);
+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);
+void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
+					      struct drm_crtc_state *state);
+struct drm_crtc_state *
+drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc);
+void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
+					    struct drm_crtc_state *state);
+void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
+					  struct drm_crtc_state *state);
+
+void drm_atomic_helper_plane_reset(struct drm_plane *plane);
+void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
+					       struct drm_plane_state *state);
+struct drm_plane_state *
+drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane);
+void __drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
+					     struct drm_plane_state *state);
+void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
+					  struct drm_plane_state *state);
+
+void drm_atomic_helper_connector_reset(struct drm_connector *connector);
+void
+__drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
+					   struct drm_connector_state *state);
+struct drm_connector_state *
+drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector);
+void
+__drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
+					    struct drm_connector_state *state);
+void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
+					  struct drm_connector_state *state);
+
+/**
+ * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
+ * @plane: the loop cursor
+ * @crtc:  the crtc whose planes are iterated
+ *
+ * This iterates over the current state, useful (for example) when applying
+ * atomic state after it has been checked and swapped.  To iterate over the
+ * planes which *will* be attached (for ->atomic_check()) see
+ * drm_crtc_for_each_pending_plane()
+ */
+#define drm_atomic_crtc_for_each_plane(plane, crtc) \
+	drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)
+
+/**
+ * drm_crtc_atomic_state_for_each_plane - iterate over attached planes in new state
+ * @plane: the loop cursor
+ * @crtc_state: the incoming crtc-state
+ *
+ * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
+ * attached if the specified state is applied.  Useful during (for example)
+ * ->atomic_check() operations, to validate the incoming state
+ */
+#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_ */