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authorBoris Brezillon <boris.brezillon@collabora.com>2020-01-28 16:55:03 +0300
committerBoris Brezillon <boris.brezillon@collabora.com>2020-01-31 18:00:21 +0300
commit751465913f045a1120188ec91ed46d90ea5fd539 (patch)
treea22279887d908e0749e22bf4ab1260ad187fab95 /include/drm/drm_atomic.h
parent6d598a32ed871ee7ddb9612a3bdc8f3f1febea33 (diff)
downloadlinux-751465913f045a1120188ec91ed46d90ea5fd539.tar.xz
drm/bridge: Add a drm_bridge_state object
One of the last remaining objects to not have its atomic state. This is being motivated by our attempt to support runtime bus-format negotiation between elements of the bridge chain. This patch just paves the road for such a feature by adding a new drm_bridge_state object inheriting from drm_private_obj so we can re-use some of the existing state initialization/tracking logic. v10: * Add changelog to the commit message v9: * Clarify the fact that the bridge->atomic_reset() and {connector,plane,crtc,...}->reset() semantics are different * Move the drm_atomic_private_obj_init() call back to drm_bridge_attach() * Check the presence of ->atomic_duplicate_state instead of ->atomic_reset in drm_atomic_add_encoder_bridges() * Fix copy&paste errors in the atomic bridge state helpers doc * Add A-b/R-b tags v8: * Move bridge state helpers out of the CONFIG_DEBUGFS section v7: * Move helpers, struct-defs, ... to atomic helper files to avoid the drm -> drm_kms_helper -> drm circular dep * Stop providing default implementation for atomic state reset, duplicate and destroy hooks (has to do with the helper/core split) * Drop all R-b/T-b as helpers have now be moved to other places v6: * Made helpers private, removed doc and moved them to satisfy dependencies * Renamed helpers to _default_ v5: * Re-introduced the helpers from v4 v4: * Fix the doc * Kill default helpers (inlined) * Fix drm_atomic_get_bridge_state() to check for an ERR_PTR() * Add Neil's R-b v3: * No changes v2: * Use drm_for_each_bridge_in_chain() * Rename helpers to be more consistent with the rest of the DRM API * Improve/fix the doc Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20200128135514.108171-2-boris.brezillon@collabora.com
Diffstat (limited to 'include/drm/drm_atomic.h')
-rw-r--r--include/drm/drm_atomic.h34
1 files changed, 34 insertions, 0 deletions
diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index 951dfb15c27b..82a888769b3d 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -670,6 +670,9 @@ __drm_atomic_get_current_plane_state(struct drm_atomic_state *state,
}
int __must_check
+drm_atomic_add_encoder_bridges(struct drm_atomic_state *state,
+ struct drm_encoder *encoder);
+int __must_check
drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
struct drm_crtc *crtc);
int __must_check
@@ -992,4 +995,35 @@ drm_atomic_crtc_effectively_active(const struct drm_crtc_state *state)
return state->active || state->self_refresh_active;
}
+/**
+ * struct drm_bridge_state - Atomic bridge state object
+ */
+struct drm_bridge_state {
+ /**
+ * @base: inherit from &drm_private_state
+ */
+ struct drm_private_state base;
+
+ /**
+ * @bridge: the bridge this state refers to
+ */
+ struct drm_bridge *bridge;
+};
+
+static inline struct drm_bridge_state *
+drm_priv_to_bridge_state(struct drm_private_state *priv)
+{
+ return container_of(priv, struct drm_bridge_state, base);
+}
+
+struct drm_bridge_state *
+drm_atomic_get_bridge_state(struct drm_atomic_state *state,
+ struct drm_bridge *bridge);
+struct drm_bridge_state *
+drm_atomic_get_old_bridge_state(struct drm_atomic_state *state,
+ struct drm_bridge *bridge);
+struct drm_bridge_state *
+drm_atomic_get_new_bridge_state(struct drm_atomic_state *state,
+ struct drm_bridge *bridge);
+
#endif /* DRM_ATOMIC_H_ */