diff options
| -rw-r--r-- | drivers/gpu/drm/drm_atomic_helper.c | 43 | ||||
| -rw-r--r-- | include/drm/drm_atomic_helper.h | 2 |
2 files changed, 45 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 3731a26979bc..a800b2c75522 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -1342,6 +1342,49 @@ drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); /** + * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes + * @crtc: CRTC + * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks + * + * Disables all planes associated with the given CRTC. This can be + * used for instance in the CRTC helper disable callback to disable + * all planes before shutting down the display pipeline. + * + * If the atomic-parameter is set the function calls the CRTC's + * atomic_begin hook before and atomic_flush hook after disabling the + * planes. + * + * It is a bug to call this function without having implemented the + * ->atomic_disable() plane hook. + */ +void drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc *crtc, + bool atomic) +{ + const struct drm_crtc_helper_funcs *crtc_funcs = + crtc->helper_private; + struct drm_plane *plane; + + if (atomic && crtc_funcs && crtc_funcs->atomic_begin) + crtc_funcs->atomic_begin(crtc, NULL); + + drm_for_each_plane(plane, crtc->dev) { + const struct drm_plane_helper_funcs *plane_funcs = + plane->helper_private; + + if (plane->state->crtc != crtc || !plane_funcs) + continue; + + WARN_ON(!plane_funcs->atomic_disable); + if (plane_funcs->atomic_disable) + plane_funcs->atomic_disable(plane, NULL); + } + + if (atomic && crtc_funcs && crtc_funcs->atomic_flush) + crtc_funcs->atomic_flush(crtc, NULL); +} +EXPORT_SYMBOL(drm_atomic_helper_disable_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 8cba54a2a0a0..b7d423732f47 100644 --- a/include/drm/drm_atomic_helper.h +++ b/include/drm/drm_atomic_helper.h @@ -62,6 +62,8 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev, 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_disable_planes_on_crtc(struct drm_crtc *crtc, + bool atomic); void drm_atomic_helper_swap_state(struct drm_device *dev, struct drm_atomic_state *state); |