diff options
Diffstat (limited to 'include/drm/drm_atomic_helper.h')
| -rw-r--r-- | include/drm/drm_atomic_helper.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h index f956b413311e..8039d54a7441 100644 --- a/include/drm/drm_atomic_helper.h +++ b/include/drm/drm_atomic_helper.h @@ -30,6 +30,10 @@ #include <drm/drm_crtc.h> +int drm_atomic_helper_check_modeset(struct drm_device *dev, + struct drm_atomic_state *state); +int drm_atomic_helper_check_planes(struct drm_device *dev, + struct drm_atomic_state *state); int drm_atomic_helper_check(struct drm_device *dev, struct drm_atomic_state *state); int drm_atomic_helper_commit(struct drm_device *dev, @@ -78,6 +82,8 @@ int drm_atomic_helper_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb, struct drm_pending_vblank_event *event, uint32_t flags); +void drm_atomic_helper_connector_dpms(struct drm_connector *connector, + int mode); /* default implementations for state handling */ void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc); @@ -123,4 +129,41 @@ void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, #define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \ drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask) +/* + * drm_atomic_plane_disabling - check whether a plane is being disabled + * @plane: plane object + * @old_state: previous atomic state + * + * Checks the atomic state of a plane to determine whether it's being disabled + * or not. This also WARNs if it detects an invalid state (both CRTC and FB + * need to either both be NULL or both be non-NULL). + * + * RETURNS: + * True if the plane is being disabled, false otherwise. + */ +static inline bool +drm_atomic_plane_disabling(struct drm_plane *plane, + struct drm_plane_state *old_state) +{ + /* + * When disabling a plane, CRTC and FB should always be NULL together. + * Anything else should be considered a bug in the atomic core, so we + * gently warn about it. + */ + WARN_ON((plane->state->crtc == NULL && plane->state->fb != NULL) || + (plane->state->crtc != NULL && plane->state->fb == NULL)); + + /* + * When using the transitional helpers, old_state may be NULL. If so, + * we know nothing about the current state and have to assume that it + * might be enabled. + * + * When using the atomic helpers, old_state won't be NULL. Therefore + * this check assumes that either the driver will have reconstructed + * the correct state in ->reset() or that the driver will have taken + * appropriate measures to disable all planes. + */ + return (!old_state || old_state->crtc) && !plane->state->crtc; +} + #endif /* DRM_ATOMIC_HELPER_H_ */ |