This is a convenience function to add all planes for a crtc,
similar to add_affected_connectors. This will be used in
drm_atomic_helper_check_modeset, but drivers can call it too
when they need to recalculate all state.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
drivers/gpu/drm/drm_atomic.c | 32 ++++++++++++++++++++++++++++++++
include/drm/drm_atomic.h | 4 ++++
2 files changed, 36 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index cd1b16b25716..c48b7db438b8 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -956,6 +956,38 @@ drm_atomic_add_affected_connectors(struct drm_atomic_state
*state,
EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
/**
+ * drm_atomic_add_affected_planes - add planes for crtc
+ * @state: atomic state
+ * @crtc: DRM crtc
+ *
+ * This function walks the current configuration and adds all planes
+ * currently used by @crtc to the atomic configuration @state.
+ *
+ * Returns:
+ * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
+ * then the w/w mutex code has detected a deadlock and the entire atomic
+ * sequence must be restarted. All other errors are fatal.
+ */
+int
+drm_atomic_add_affected_planes(struct drm_atomic_state *state,
+ struct drm_crtc *crtc)
+{
+ struct drm_plane *plane;
+
+ WARN_ON(!drm_atomic_get_existing_crtc_state(state, crtc));
+
+ drm_for_each_plane_mask(plane, state->dev, crtc->state->plane_mask) {
+ struct drm_plane_state *plane_state =
+ drm_atomic_get_plane_state(state, plane);
+
+ if (IS_ERR(plane_state))
+ return PTR_ERR(plane_state);
+ }
+ return 0;
+}
+EXPORT_SYMBOL(drm_atomic_add_affected_planes);
+
+/**
* drm_atomic_connectors_for_crtc - count number of connected outputs
* @state: atomic state
* @crtc: DRM crtc
diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index f0d3a7387d99..e89db0c377ba 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -120,6 +120,10 @@ drm_atomic_set_crtc_for_connector(struct
drm_connector_state *conn_state,
int __must_check
drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
struct drm_crtc *crtc);
+int __must_check
+drm_atomic_add_affected_planes(struct drm_atomic_state *state,
+ struct drm_crtc *crtc);
+
int
drm_atomic_connectors_for_crtc(struct drm_atomic_state *state,
struct drm_crtc *crtc);
--
2.1.0
