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authorDaniel Vetter <daniel.vetter@ffwll.ch>2014-11-03 17:56:43 +0300
committerDaniel Vetter <daniel.vetter@ffwll.ch>2014-11-06 23:02:23 +0300
commitd461701c551efe92893b31d05906d51e2f1f8244 (patch)
tree05c8057756af686e1e7f679f3d24b79a559fc355 /include/drm/drm_atomic_helper.h
parent8bc0f3126cc5d37c98d213171e71626536fd1e86 (diff)
downloadlinux-d461701c551efe92893b31d05906d51e2f1f8244.tar.xz
drm/atomic-helpers: functions for state duplicate/destroy/reset
The atomic users and helpers assume that there is always a obj->state structure around. Which means drivers need to somehow create that at driver load time. Also it should obviously reset hardware state, so needs to be reset upon resume. Finally the destroy/duplicate_state functions are an awful lot of boilerplate if the driver doesn't need anything beyond the default state objects. So add helper functions for all of this. v2: Somehow the plane/connector versions got lost in the first version. v3: Add kerneldoc. v4: Make duplicate_state functions a bit more robust, which is useful for debugging state tracking issues when transitioning to atomic. v5: Clear temporary variables in the crtc state when duplicating it, like ->mode_changed or ->planes_changed. If we don't do this stale values for these might pollute the next atomic modeset. v6: Also clear crtc_state->event in case the driver didn't (yet) clear this out. v7: Split out wrong squashed commit. Also improve the kerneldoc to mention that obj->state can be NULL and when. Both suggested by Daniel Thompson. Cc: Daniel Thompson <daniel.thompson@linaro.org> Cc: Sean Paul <seanpaul@chromium.org> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'include/drm/drm_atomic_helper.h')
-rw-r--r--include/drm/drm_atomic_helper.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
index 28a2f3a815fd..67e3c4645ae0 100644
--- a/include/drm/drm_atomic_helper.h
+++ b/include/drm/drm_atomic_helper.h
@@ -74,5 +74,24 @@ int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
struct drm_pending_vblank_event *event,
uint32_t flags);
+/* default implementations for state handling */
+void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);
+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_plane_reset(struct drm_plane *plane);
+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_connector_reset(struct drm_connector *connector);
+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);
+
#endif /* DRM_ATOMIC_HELPER_H_ */