drm_atomic_helper_commit_planes calls all atomic_begin's first, then updates all planes, finally calling atomic_flush.
Some drivers may want to things like disabling irq's from their atomic_begin, in which case a second call to atomic_begin will splat. By using commit_planes_on_crtc on each crtc in the atomic state they'll evade that issue.
Signed-off-by: Maarten Lankhorst maarten.lankhorst@linux.intel.com --- drivers/gpu/drm/drm_atomic_helper.c | 53 +++++++++++++++++++++++++++++++++++++ include/drm/drm_atomic_helper.h | 1 + 2 files changed, 54 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index b82ef6262469..2da8a16bb39e 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -1181,6 +1181,59 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev, EXPORT_SYMBOL(drm_atomic_helper_commit_planes);
/** + * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc + * @old_crtc_state: atomic state object with the old crtc state + * + * This function commits the new plane state using the plane and atomic helper + * functions for planes on the specific crtc. It assumes that the atomic state + * has already been pushed into the relevant object state pointers, since this + * step can no longer fail. + * + * This function can only be used when planes are not allowed to move between + * different crtc's. + */ +void +drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) +{ + const struct drm_crtc_helper_funcs *crtc_funcs; + struct drm_crtc *crtc = old_crtc_state->crtc; + struct drm_atomic_state *old_state = old_crtc_state->state; + struct drm_plane *plane; + unsigned plane_mask; + + plane_mask = old_crtc_state->plane_mask; + plane_mask |= crtc->state->plane_mask; + + crtc_funcs = crtc->helper_private; + if (crtc_funcs && crtc_funcs->atomic_begin) + crtc_funcs->atomic_begin(crtc); + + drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { + struct drm_plane_state *old_plane_state = + drm_atomic_get_existing_plane_state(old_state, plane); + const struct drm_plane_helper_funcs *plane_funcs; + + plane_funcs = plane->helper_private; + + if (!old_plane_state || !plane_funcs) + continue; + + WARN_ON(plane->state->crtc && plane->state->crtc != crtc); + + if (drm_atomic_plane_disabling(plane, old_plane_state) && + plane_funcs->atomic_disable) + plane_funcs->atomic_disable(plane, old_plane_state); + else if (plane->state->crtc || + drm_atomic_plane_disabling(plane, old_plane_state)) + plane_funcs->atomic_update(plane, old_plane_state); + } + + if (crtc_funcs->atomic_flush) + crtc_funcs->atomic_flush(crtc); +} +EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); + +/** * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit * @dev: DRM device * @old_state: atomic state object with old state structures diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h index 6ee0ee5b6143..cc1fee8a12d0 100644 --- a/include/drm/drm_atomic_helper.h +++ b/include/drm/drm_atomic_helper.h @@ -58,6 +58,7 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev, struct drm_atomic_state *state); void drm_atomic_helper_cleanup_planes(struct drm_device *dev, struct drm_atomic_state *old_state); +void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);
void drm_atomic_helper_swap_state(struct drm_device *dev, struct drm_atomic_state *state);