The current check doesn't handle the case where we don't steal an encoder, but keep it on the current connector. If we repurpose disable_conflicting_encoders to do the checking, we just have to reject the ones that conflict. Changes since v1: - Return early when encoder_mask is empty, drm_for_each_connector requires connection_mutex held. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx> Testcase: kms_setmode.invalid-clone-single-crtc-stealing --- diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 3543c7fcd072..f44c043596d0 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -86,7 +86,8 @@ drm_atomic_helper_plane_changed(struct drm_atomic_state *state, } } -static int disable_conflicting_connectors(struct drm_atomic_state *state) +static int handle_conflicting_encoders(struct drm_atomic_state *state, + bool disable_conflicting_encoders) { struct drm_connector_state *conn_state; struct drm_connector *connector; @@ -106,10 +107,22 @@ static int disable_conflicting_connectors(struct drm_atomic_state *state) else new_encoder = funcs->best_encoder(connector); - if (new_encoder) + if (new_encoder) { + if (encoder_mask & (1 << drm_encoder_index(new_encoder))) { + DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] on [CONNECTOR:%d:%s] already assigned\n", + new_encoder->base.id, new_encoder->name, + connector->base.id, connector->name); + + return -EINVAL; + } + encoder_mask |= 1 << drm_encoder_index(new_encoder); + } } + if (!encoder_mask) + return 0; + drm_for_each_connector(connector, state->dev) { struct drm_crtc_state *crtc_state; @@ -120,6 +133,15 @@ static int disable_conflicting_connectors(struct drm_atomic_state *state) if (!encoder || !(encoder_mask & (1 << drm_encoder_index(encoder)))) continue; + if (!disable_conflicting_encoders) { + DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s] by [CONNECTOR:%d:%s]\n", + encoder->base.id, encoder->name, + connector->state->crtc->base.id, + connector->state->crtc->name, + connector->base.id, connector->name); + return -EINVAL; + } + conn_state = drm_atomic_get_connector_state(state, connector); if (IS_ERR(conn_state)) return PTR_ERR(conn_state); @@ -148,26 +170,6 @@ static int disable_conflicting_connectors(struct drm_atomic_state *state) return 0; } -static bool -check_pending_encoder_assignment(struct drm_atomic_state *state, - struct drm_encoder *new_encoder) -{ - struct drm_connector *connector; - struct drm_connector_state *conn_state; - int i; - - for_each_connector_in_state(state, connector, conn_state, i) { - if (conn_state->best_encoder != new_encoder) - continue; - - /* encoder already assigned and we're trying to re-steal it! */ - if (connector->state->best_encoder != conn_state->best_encoder) - return false; - } - - return true; -} - static void set_best_encoder(struct drm_atomic_state *state, struct drm_connector_state *conn_state, @@ -326,13 +328,6 @@ update_connector_routing(struct drm_atomic_state *state, return 0; } - if (!check_pending_encoder_assignment(state, new_encoder)) { - DRM_DEBUG_ATOMIC("Encoder for [CONNECTOR:%d:%s] already assigned\n", - connector->base.id, - connector->name); - return -EINVAL; - } - ret = steal_encoder(state, new_encoder); if (ret) { DRM_DEBUG_ATOMIC("Encoder stealing failed for [CONNECTOR:%d:%s]\n", @@ -511,11 +506,9 @@ drm_atomic_helper_check_modeset(struct drm_device *dev, } } - if (state->legacy_set_config) { - ret = disable_conflicting_connectors(state); - if (ret) - return ret; - } + ret = handle_conflicting_encoders(state, state->legacy_set_config); + if (ret) + return ret; for_each_connector_in_state(state, connector, connector_state, i) { /* _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx