This is useful for drivers which have their own modeset infrastructure
but want to reuse most of the legacy state frobbery from the helpers.
i915 wants this.
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
drivers/gpu/drm/drm_atomic_helper.c | 23 ++++++++++++++++++++---
1 file changed, 20 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/drm_atomic_helper.c
b/drivers/gpu/drm/drm_atomic_helper.c
index 181bbc1ef1b9..8ba5be8c754c 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -619,8 +619,22 @@ disable_outputs(struct drm_device *dev, struct
drm_atomic_state *old_state)
}
}
-static void
-set_routing_links(struct drm_device *dev, struct drm_atomic_state *old_state)
+/**
+ * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state
+ * @dev: DRM device
+ * @old_state: atomic state object with old state structures
+ *
+ * This function updates all the various legacy modeset state pointers in
+ * connectors, encoders and crtcs. It also updates the timestamping constants
+ * used for precise vblank timestamps by calling
+ * drm_calc_timestamping_constants().
+ *
+ * Drivers can use this for building their own atomic commit if they don't have
+ * a pure helper-based modeset implementation.
+ */
+void
+drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
+ struct drm_atomic_state
*old_state)
{
struct drm_connector *connector;
struct drm_connector_state *old_conn_state;
@@ -661,6 +675,7 @@ set_routing_links(struct drm_device *dev, struct
drm_atomic_state *old_state)
drm_calc_timestamping_constants(crtc,
&crtc->state->adjusted_mode);
}
}
+EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state);
static void
crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state)
@@ -739,7 +754,9 @@ void drm_atomic_helper_commit_modeset_disables(struct
drm_device *dev,
struct drm_atomic_state
*old_state)
{
disable_outputs(dev, old_state);
- set_routing_links(dev, old_state);
+
+ drm_atomic_helper_update_legacy_modeset_state(dev, old_state);
+
crtc_set_mode(dev, old_state);
}
EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables);
--
2.1.4
