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Diffstat (limited to 'include/drm/drm_simple_kms_helper.h')
-rw-r--r--include/drm/drm_simple_kms_helper.h94
1 files changed, 94 insertions, 0 deletions
diff --git a/include/drm/drm_simple_kms_helper.h b/include/drm/drm_simple_kms_helper.h
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+++ b/include/drm/drm_simple_kms_helper.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2016 Noralf Trønnes
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef __LINUX_DRM_SIMPLE_KMS_HELPER_H
+#define __LINUX_DRM_SIMPLE_KMS_HELPER_H
+
+struct drm_simple_display_pipe;
+
+/**
+ * struct drm_simple_display_pipe_funcs - helper operations for a simple
+ * display pipeline
+ */
+struct drm_simple_display_pipe_funcs {
+ /**
+ * @enable:
+ *
+ * This function should be used to enable the pipeline.
+ * It is called when the underlying crtc is enabled.
+ * This hook is optional.
+ */
+ void (*enable)(struct drm_simple_display_pipe *pipe,
+ struct drm_crtc_state *crtc_state);
+ /**
+ * @disable:
+ *
+ * This function should be used to disable the pipeline.
+ * It is called when the underlying crtc is disabled.
+ * This hook is optional.
+ */
+ void (*disable)(struct drm_simple_display_pipe *pipe);
+
+ /**
+ * @check:
+ *
+ * This function is called in the check phase of an atomic update,
+ * specifically when the underlying plane is checked.
+ * The simple display pipeline helpers already check that the plane is
+ * not scaled, fills the entire visible area and is always enabled
+ * when the crtc is also enabled.
+ * This hook is optional.
+ *
+ * RETURNS:
+ *
+ * 0 on success, -EINVAL if the state or the transition can't be
+ * supported, -ENOMEM on memory allocation failure and -EDEADLK if an
+ * attempt to obtain another state object ran into a &drm_modeset_lock
+ * deadlock.
+ */
+ int (*check)(struct drm_simple_display_pipe *pipe,
+ struct drm_plane_state *plane_state,
+ struct drm_crtc_state *crtc_state);
+ /**
+ * @update:
+ *
+ * This function is called when the underlying plane state is updated.
+ * This hook is optional.
+ */
+ void (*update)(struct drm_simple_display_pipe *pipe,
+ struct drm_plane_state *plane_state);
+};
+
+/**
+ * struct drm_simple_display_pipe - simple display pipeline
+ * @crtc: CRTC control structure
+ * @plane: Plane control structure
+ * @encoder: Encoder control structure
+ * @connector: Connector control structure
+ * @funcs: Pipeline control functions (optional)
+ *
+ * Simple display pipeline with plane, crtc and encoder collapsed into one
+ * entity. It should be initialized by calling drm_simple_display_pipe_init().
+ */
+struct drm_simple_display_pipe {
+ struct drm_crtc crtc;
+ struct drm_plane plane;
+ struct drm_encoder encoder;
+ struct drm_connector *connector;
+
+ const struct drm_simple_display_pipe_funcs *funcs;
+};
+
+int drm_simple_display_pipe_init(struct drm_device *dev,
+ struct drm_simple_display_pipe *pipe,
+ const struct drm_simple_display_pipe_funcs *funcs,
+ const uint32_t *formats, unsigned int format_count,
+ struct drm_connector *connector);
+
+#endif /* __LINUX_DRM_SIMPLE_KMS_HELPER_H */