diff options
| -rw-r--r-- | drivers/gpu/drm/drm_atomic_helper.c | 62 | ||||
| -rw-r--r-- | include/drm/drm_atomic_helper.h | 1 |
2 files changed, 63 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index b82ef6262469..424a98bfa686 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -1127,6 +1127,10 @@ EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); * * It still requires the global state object @old_state to know which planes and * crtcs need to be updated though. + * + * Note that this function does all plane updates across all CRTCs in one step. + * If the hardware can't support this approach look at + * drm_atomic_helper_commit_planes_on_crtc() instead. */ void drm_atomic_helper_commit_planes(struct drm_device *dev, struct drm_atomic_state *old_state) @@ -1181,6 +1185,64 @@ 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 is useful when plane updates should be done crtc-by-crtc + * instead of one global step like drm_atomic_helper_commit_planes() does. + * + * This function can only be savely used when planes are not allowed to move + * between different CRTCs because this function doesn't handle inter-CRTC + * depencies. Callers need to ensure that either no such depencies exist, + * resolve them through ordering of commit calls or through some other means. + */ +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 && 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); |