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22 #ifndef _DRM_DP_MST_HELPER_H_
23 #define _DRM_DP_MST_HELPER_H_
25 #include <linux/types.h>
26 #include <drm/drm_dp_helper.h>
27 #include <drm/drm_atomic.h>
29 #if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)
30 #include <linux/stackdepot.h>
31 #include <linux/timekeeping.h>
33 enum drm_dp_mst_topology_ref_type {
34 DRM_DP_MST_TOPOLOGY_REF_GET,
35 DRM_DP_MST_TOPOLOGY_REF_PUT,
38 struct drm_dp_mst_topology_ref_history {
39 struct drm_dp_mst_topology_ref_entry {
40 enum drm_dp_mst_topology_ref_type type;
43 depot_stack_handle_t backtrace;
47 #endif /* IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS) */
49 struct drm_dp_mst_branch;
52 * struct drm_dp_vcpi - Virtual Channel Payload Identifier
53 * @vcpi: Virtual channel ID.
54 * @pbn: Payload Bandwidth Number for this channel
55 * @aligned_pbn: PBN aligned with slot size
56 * @num_slots: number of slots for this PBN
66 * struct drm_dp_mst_port - MST port
67 * @port_num: port number
68 * @input: if this port is an input port. Protected by
69 * &drm_dp_mst_topology_mgr.base.lock.
70 * @mcs: message capability status - DP 1.2 spec. Protected by
71 * &drm_dp_mst_topology_mgr.base.lock.
72 * @ddps: DisplayPort Device Plug Status - DP 1.2. Protected by
73 * &drm_dp_mst_topology_mgr.base.lock.
74 * @pdt: Peer Device Type. Protected by
75 * &drm_dp_mst_topology_mgr.base.lock.
76 * @ldps: Legacy Device Plug Status. Protected by
77 * &drm_dp_mst_topology_mgr.base.lock.
78 * @dpcd_rev: DPCD revision of device on this port. Protected by
79 * &drm_dp_mst_topology_mgr.base.lock.
80 * @num_sdp_streams: Number of simultaneous streams. Protected by
81 * &drm_dp_mst_topology_mgr.base.lock.
82 * @num_sdp_stream_sinks: Number of stream sinks. Protected by
83 * &drm_dp_mst_topology_mgr.base.lock.
84 * @available_pbn: Available bandwidth for this port. Protected by
85 * &drm_dp_mst_topology_mgr.base.lock.
86 * @next: link to next port on this branch device
87 * @aux: i2c aux transport to talk to device connected to this port, protected
88 * by &drm_dp_mst_topology_mgr.base.lock.
89 * @parent: branch device parent of this port
90 * @vcpi: Virtual Channel Payload info for this port.
91 * @connector: DRM connector this port is connected to. Protected by
92 * &drm_dp_mst_topology_mgr.base.lock.
93 * @mgr: topology manager this port lives under.
95 * This structure represents an MST port endpoint on a device somewhere
96 * in the MST topology.
98 struct drm_dp_mst_port {
100 * @topology_kref: refcount for this port's lifetime in the topology,
101 * only the DP MST helpers should need to touch this
103 struct kref topology_kref;
106 * @malloc_kref: refcount for the memory allocation containing this
107 * structure. See drm_dp_mst_get_port_malloc() and
108 * drm_dp_mst_put_port_malloc().
110 struct kref malloc_kref;
112 #if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)
114 * @topology_ref_history: A history of each topology
115 * reference/dereference. See CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS.
117 struct drm_dp_mst_topology_ref_history topology_ref_history;
128 u8 num_sdp_stream_sinks;
129 uint16_t available_pbn;
130 struct list_head next;
132 * @mstb: the branch device connected to this port, if there is one.
133 * This should be considered protected for reading by
134 * &drm_dp_mst_topology_mgr.lock. There are two exceptions to this:
135 * &drm_dp_mst_topology_mgr.up_req_work and
136 * &drm_dp_mst_topology_mgr.work, which do not grab
137 * &drm_dp_mst_topology_mgr.lock during reads but are the only
138 * updaters of this list and are protected from writing concurrently
139 * by &drm_dp_mst_topology_mgr.probe_lock.
141 struct drm_dp_mst_branch *mstb;
142 struct drm_dp_aux aux; /* i2c bus for this port? */
143 struct drm_dp_mst_branch *parent;
145 struct drm_dp_vcpi vcpi;
146 struct drm_connector *connector;
147 struct drm_dp_mst_topology_mgr *mgr;
150 * @cached_edid: for DP logical ports - make tiling work by ensuring
151 * that the EDID for all connectors is read immediately.
153 struct edid *cached_edid;
155 * @has_audio: Tracks whether the sink connector to this port is
164 * struct drm_dp_mst_branch - MST branch device.
165 * @rad: Relative Address to talk to this branch device.
166 * @lct: Link count total to talk to this branch device.
167 * @num_ports: number of ports on the branch.
168 * @msg_slots: one bit per transmitted msg slot.
169 * @port_parent: pointer to the port parent, NULL if toplevel.
170 * @mgr: topology manager for this branch device.
171 * @tx_slots: transmission slots for this device.
172 * @last_seqno: last sequence number used to talk to this.
173 * @link_address_sent: if a link address message has been sent to this device yet.
174 * @guid: guid for DP 1.2 branch device. port under this branch can be
175 * identified by port #.
177 * This structure represents an MST branch device, there is one
178 * primary branch device at the root, along with any other branches connected
179 * to downstream port of parent branches.
181 struct drm_dp_mst_branch {
183 * @topology_kref: refcount for this branch device's lifetime in the
184 * topology, only the DP MST helpers should need to touch this
186 struct kref topology_kref;
189 * @malloc_kref: refcount for the memory allocation containing this
190 * structure. See drm_dp_mst_get_mstb_malloc() and
191 * drm_dp_mst_put_mstb_malloc().
193 struct kref malloc_kref;
195 #if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)
197 * @topology_ref_history: A history of each topology
198 * reference/dereference. See CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS.
200 struct drm_dp_mst_topology_ref_history topology_ref_history;
204 * @destroy_next: linked-list entry used by
205 * drm_dp_delayed_destroy_work()
207 struct list_head destroy_next;
215 * @ports: the list of ports on this branch device. This should be
216 * considered protected for reading by &drm_dp_mst_topology_mgr.lock.
217 * There are two exceptions to this:
218 * &drm_dp_mst_topology_mgr.up_req_work and
219 * &drm_dp_mst_topology_mgr.work, which do not grab
220 * &drm_dp_mst_topology_mgr.lock during reads but are the only
221 * updaters of this list and are protected from updating the list
222 * concurrently by @drm_dp_mst_topology_mgr.probe_lock
224 struct list_head ports;
226 /* list of tx ops queue for this port */
227 struct drm_dp_mst_port *port_parent;
228 struct drm_dp_mst_topology_mgr *mgr;
230 /* slots are protected by mstb->mgr->qlock */
231 struct drm_dp_sideband_msg_tx *tx_slots[2];
233 bool link_address_sent;
235 /* global unique identifier to identify branch devices */
240 /* sideband msg header - not bit struct */
241 struct drm_dp_sideband_msg_hdr {
253 struct drm_dp_nak_reply {
259 struct drm_dp_link_address_ack_reply {
262 struct drm_dp_link_addr_reply_port {
268 bool legacy_device_plug_status;
272 u8 num_sdp_stream_sinks;
276 struct drm_dp_remote_dpcd_read_ack_reply {
282 struct drm_dp_remote_dpcd_write_ack_reply {
286 struct drm_dp_remote_dpcd_write_nak_reply {
289 u8 bytes_written_before_failure;
292 struct drm_dp_remote_i2c_read_ack_reply {
298 struct drm_dp_remote_i2c_read_nak_reply {
301 u8 i2c_nak_transaction;
304 struct drm_dp_remote_i2c_write_ack_reply {
309 struct drm_dp_sideband_msg_rx {
313 u8 curchunk_idx; /* chunk we are parsing now */
315 u8 curlen; /* total length of the msg */
318 struct drm_dp_sideband_msg_hdr initial_hdr;
321 #define DRM_DP_MAX_SDP_STREAMS 16
322 struct drm_dp_allocate_payload {
324 u8 number_sdp_streams;
327 u8 sdp_stream_sink[DRM_DP_MAX_SDP_STREAMS];
330 struct drm_dp_allocate_payload_ack_reply {
336 struct drm_dp_connection_status_notify {
339 bool legacy_device_plug_status;
340 bool displayport_device_plug_status;
341 bool message_capability_status;
346 struct drm_dp_remote_dpcd_read {
352 struct drm_dp_remote_dpcd_write {
359 #define DP_REMOTE_I2C_READ_MAX_TRANSACTIONS 4
360 struct drm_dp_remote_i2c_read {
363 struct drm_dp_remote_i2c_read_tx {
368 u8 i2c_transaction_delay;
369 } transactions[DP_REMOTE_I2C_READ_MAX_TRANSACTIONS];
370 u8 read_i2c_device_id;
374 struct drm_dp_remote_i2c_write {
376 u8 write_i2c_device_id;
381 /* this covers ENUM_RESOURCES, POWER_DOWN_PHY, POWER_UP_PHY */
382 struct drm_dp_port_number_req {
386 struct drm_dp_enum_path_resources_ack_reply {
389 u16 full_payload_bw_number;
390 u16 avail_payload_bw_number;
393 /* covers POWER_DOWN_PHY, POWER_UP_PHY */
394 struct drm_dp_port_number_rep {
398 struct drm_dp_query_payload {
403 struct drm_dp_resource_status_notify {
409 struct drm_dp_query_payload_ack_reply {
414 struct drm_dp_sideband_msg_req_body {
417 struct drm_dp_connection_status_notify conn_stat;
418 struct drm_dp_port_number_req port_num;
419 struct drm_dp_resource_status_notify resource_stat;
421 struct drm_dp_query_payload query_payload;
422 struct drm_dp_allocate_payload allocate_payload;
424 struct drm_dp_remote_dpcd_read dpcd_read;
425 struct drm_dp_remote_dpcd_write dpcd_write;
427 struct drm_dp_remote_i2c_read i2c_read;
428 struct drm_dp_remote_i2c_write i2c_write;
432 struct drm_dp_sideband_msg_reply_body {
436 struct drm_dp_nak_reply nak;
437 struct drm_dp_link_address_ack_reply link_addr;
438 struct drm_dp_port_number_rep port_number;
440 struct drm_dp_enum_path_resources_ack_reply path_resources;
441 struct drm_dp_allocate_payload_ack_reply allocate_payload;
442 struct drm_dp_query_payload_ack_reply query_payload;
444 struct drm_dp_remote_dpcd_read_ack_reply remote_dpcd_read_ack;
445 struct drm_dp_remote_dpcd_write_ack_reply remote_dpcd_write_ack;
446 struct drm_dp_remote_dpcd_write_nak_reply remote_dpcd_write_nack;
448 struct drm_dp_remote_i2c_read_ack_reply remote_i2c_read_ack;
449 struct drm_dp_remote_i2c_read_nak_reply remote_i2c_read_nack;
450 struct drm_dp_remote_i2c_write_ack_reply remote_i2c_write_ack;
454 /* msg is queued to be put into a slot */
455 #define DRM_DP_SIDEBAND_TX_QUEUED 0
456 /* msg has started transmitting on a slot - still on msgq */
457 #define DRM_DP_SIDEBAND_TX_START_SEND 1
458 /* msg has finished transmitting on a slot - removed from msgq only in slot */
459 #define DRM_DP_SIDEBAND_TX_SENT 2
460 /* msg has received a response - removed from slot */
461 #define DRM_DP_SIDEBAND_TX_RX 3
462 #define DRM_DP_SIDEBAND_TX_TIMEOUT 4
464 struct drm_dp_sideband_msg_tx {
469 struct drm_dp_mst_branch *dst;
470 struct list_head next;
474 struct drm_dp_sideband_msg_reply_body reply;
477 /* sideband msg handler */
478 struct drm_dp_mst_topology_mgr;
479 struct drm_dp_mst_topology_cbs {
480 /* create a connector for a port */
481 struct drm_connector *(*add_connector)(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *path);
482 void (*register_connector)(struct drm_connector *connector);
483 void (*destroy_connector)(struct drm_dp_mst_topology_mgr *mgr,
484 struct drm_connector *connector);
487 #define DP_MAX_PAYLOAD (sizeof(unsigned long) * 8)
489 #define DP_PAYLOAD_LOCAL 1
490 #define DP_PAYLOAD_REMOTE 2
491 #define DP_PAYLOAD_DELETE_LOCAL 3
493 struct drm_dp_payload {
500 #define to_dp_mst_topology_state(x) container_of(x, struct drm_dp_mst_topology_state, base)
502 struct drm_dp_vcpi_allocation {
503 struct drm_dp_mst_port *port;
507 struct list_head next;
510 struct drm_dp_mst_topology_state {
511 struct drm_private_state base;
512 struct list_head vcpis;
513 struct drm_dp_mst_topology_mgr *mgr;
516 #define to_dp_mst_topology_mgr(x) container_of(x, struct drm_dp_mst_topology_mgr, base)
519 * struct drm_dp_mst_topology_mgr - DisplayPort MST manager
521 * This struct represents the toplevel displayport MST topology manager.
522 * There should be one instance of this for every MST capable DP connector
525 struct drm_dp_mst_topology_mgr {
527 * @base: Base private object for atomic
529 struct drm_private_obj base;
532 * @dev: device pointer for adding i2c devices etc.
534 struct drm_device *dev;
536 * @cbs: callbacks for connector addition and destruction.
538 const struct drm_dp_mst_topology_cbs *cbs;
540 * @max_dpcd_transaction_bytes: maximum number of bytes to read/write
543 int max_dpcd_transaction_bytes;
545 * @aux: AUX channel for the DP MST connector this topolgy mgr is
548 struct drm_dp_aux *aux;
550 * @max_payloads: maximum number of payloads the GPU can generate.
554 * @conn_base_id: DRM connector ID this mgr is connected to. Only used
555 * to build the MST connector path value.
560 * @down_rep_recv: Message receiver state for down replies.
562 struct drm_dp_sideband_msg_rx down_rep_recv;
564 * @up_req_recv: Message receiver state for up requests.
566 struct drm_dp_sideband_msg_rx up_req_recv;
569 * @lock: protects @mst_state, @mst_primary, @dpcd, and
570 * @payload_id_table_cleared.
575 * @probe_lock: Prevents @work and @up_req_work, the only writers of
576 * &drm_dp_mst_port.mstb and &drm_dp_mst_branch.ports, from racing
577 * while they update the topology.
579 struct mutex probe_lock;
582 * @mst_state: If this manager is enabled for an MST capable port. False
583 * if no MST sink/branch devices is connected.
588 * @payload_id_table_cleared: Whether or not we've cleared the payload
589 * ID table for @mst_primary. Protected by @lock.
591 bool payload_id_table_cleared : 1;
594 * @mst_primary: Pointer to the primary/first branch device.
596 struct drm_dp_mst_branch *mst_primary;
599 * @dpcd: Cache of DPCD for primary port.
601 u8 dpcd[DP_RECEIVER_CAP_SIZE];
603 * @sink_count: Sink count from DEVICE_SERVICE_IRQ_VECTOR_ESI0.
607 * @pbn_div: PBN to slots divisor.
612 * @funcs: Atomic helper callbacks
614 const struct drm_private_state_funcs *funcs;
617 * @qlock: protects @tx_msg_downq, the &drm_dp_mst_branch.txslost and
618 * &drm_dp_sideband_msg_tx.state once they are queued
622 * @tx_msg_downq: List of pending down replies.
624 struct list_head tx_msg_downq;
627 * @payload_lock: Protect payload information.
629 struct mutex payload_lock;
631 * @proposed_vcpis: Array of pointers for the new VCPI allocation. The
632 * VCPI structure itself is &drm_dp_mst_port.vcpi.
634 struct drm_dp_vcpi **proposed_vcpis;
636 * @payloads: Array of payloads.
638 struct drm_dp_payload *payloads;
640 * @payload_mask: Elements of @payloads actually in use. Since
641 * reallocation of active outputs isn't possible gaps can be created by
642 * disabling outputs out of order compared to how they've been enabled.
644 unsigned long payload_mask;
646 * @vcpi_mask: Similar to @payload_mask, but for @proposed_vcpis.
648 unsigned long vcpi_mask;
651 * @tx_waitq: Wait to queue stall for the tx worker.
653 wait_queue_head_t tx_waitq;
657 struct work_struct work;
659 * @tx_work: Sideband transmit worker. This can nest within the main
660 * @work worker for each transaction @work launches.
662 struct work_struct tx_work;
665 * @destroy_port_list: List of to be destroyed connectors.
667 struct list_head destroy_port_list;
669 * @destroy_branch_device_list: List of to be destroyed branch
672 struct list_head destroy_branch_device_list;
674 * @delayed_destroy_lock: Protects @destroy_port_list and
675 * @destroy_branch_device_list.
677 struct mutex delayed_destroy_lock;
679 * @delayed_destroy_work: Work item to destroy MST port and branch
680 * devices, needed to avoid locking inversion.
682 struct work_struct delayed_destroy_work;
685 * @up_req_list: List of pending up requests from the topology that
686 * need to be processed, in chronological order.
688 struct list_head up_req_list;
690 * @up_req_lock: Protects @up_req_list
692 struct mutex up_req_lock;
694 * @up_req_work: Work item to process up requests received from the
695 * topology. Needed to avoid blocking hotplug handling and sideband
698 struct work_struct up_req_work;
700 #if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)
702 * @topology_ref_history_lock: protects
703 * &drm_dp_mst_port.topology_ref_history and
704 * &drm_dp_mst_branch.topology_ref_history.
706 struct mutex topology_ref_history_lock;
710 int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr,
711 struct drm_device *dev, struct drm_dp_aux *aux,
712 int max_dpcd_transaction_bytes,
713 int max_payloads, int conn_base_id);
715 void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr);
718 int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state);
721 int drm_dp_mst_hpd_irq(struct drm_dp_mst_topology_mgr *mgr, u8 *esi, bool *handled);
725 drm_dp_mst_detect_port(struct drm_connector *connector,
726 struct drm_modeset_acquire_ctx *ctx,
727 struct drm_dp_mst_topology_mgr *mgr,
728 struct drm_dp_mst_port *port);
730 bool drm_dp_mst_port_has_audio(struct drm_dp_mst_topology_mgr *mgr,
731 struct drm_dp_mst_port *port);
732 struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
735 int drm_dp_calc_pbn_mode(int clock, int bpp, bool dsc);
737 bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr,
738 struct drm_dp_mst_port *port, int pbn, int slots);
740 int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
743 void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
746 void drm_dp_mst_deallocate_vcpi(struct drm_dp_mst_topology_mgr *mgr,
747 struct drm_dp_mst_port *port);
750 int drm_dp_find_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr,
754 int drm_dp_update_payload_part1(struct drm_dp_mst_topology_mgr *mgr);
757 int drm_dp_update_payload_part2(struct drm_dp_mst_topology_mgr *mgr);
759 int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr);
761 void drm_dp_mst_dump_topology(struct seq_file *m,
762 struct drm_dp_mst_topology_mgr *mgr);
764 void drm_dp_mst_topology_mgr_suspend(struct drm_dp_mst_topology_mgr *mgr);
766 drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr,
769 ssize_t drm_dp_mst_dpcd_read(struct drm_dp_aux *aux,
770 unsigned int offset, void *buffer, size_t size);
771 ssize_t drm_dp_mst_dpcd_write(struct drm_dp_aux *aux,
772 unsigned int offset, void *buffer, size_t size);
774 int drm_dp_mst_connector_late_register(struct drm_connector *connector,
775 struct drm_dp_mst_port *port);
776 void drm_dp_mst_connector_early_unregister(struct drm_connector *connector,
777 struct drm_dp_mst_port *port);
779 struct drm_dp_mst_topology_state *drm_atomic_get_mst_topology_state(struct drm_atomic_state *state,
780 struct drm_dp_mst_topology_mgr *mgr);
782 drm_dp_atomic_find_vcpi_slots(struct drm_atomic_state *state,
783 struct drm_dp_mst_topology_mgr *mgr,
784 struct drm_dp_mst_port *port, int pbn,
786 int drm_dp_mst_atomic_enable_dsc(struct drm_atomic_state *state,
787 struct drm_dp_mst_port *port,
788 int pbn, int pbn_div,
791 drm_dp_atomic_release_vcpi_slots(struct drm_atomic_state *state,
792 struct drm_dp_mst_topology_mgr *mgr,
793 struct drm_dp_mst_port *port);
794 int drm_dp_send_power_updown_phy(struct drm_dp_mst_topology_mgr *mgr,
795 struct drm_dp_mst_port *port, bool power_up);
796 int __must_check drm_dp_mst_atomic_check(struct drm_atomic_state *state);
798 void drm_dp_mst_get_port_malloc(struct drm_dp_mst_port *port);
799 void drm_dp_mst_put_port_malloc(struct drm_dp_mst_port *port);
801 struct drm_dp_aux *drm_dp_mst_dsc_aux_for_port(struct drm_dp_mst_port *port);
803 extern const struct drm_private_state_funcs drm_dp_mst_topology_state_funcs;
806 * __drm_dp_mst_state_iter_get - private atomic state iterator function for
808 * @state: &struct drm_atomic_state pointer
809 * @mgr: pointer to the &struct drm_dp_mst_topology_mgr iteration cursor
810 * @old_state: optional pointer to the old &struct drm_dp_mst_topology_state
812 * @new_state: optional pointer to the new &struct drm_dp_mst_topology_state
814 * @i: int iteration cursor, for macro-internal use
816 * Used by for_each_oldnew_mst_mgr_in_state(),
817 * for_each_old_mst_mgr_in_state(), and for_each_new_mst_mgr_in_state(). Don't
818 * call this directly.
821 * True if the current &struct drm_private_obj is a &struct
822 * drm_dp_mst_topology_mgr, false otherwise.
825 __drm_dp_mst_state_iter_get(struct drm_atomic_state *state,
826 struct drm_dp_mst_topology_mgr **mgr,
827 struct drm_dp_mst_topology_state **old_state,
828 struct drm_dp_mst_topology_state **new_state,
831 struct __drm_private_objs_state *objs_state = &state->private_objs[i];
833 if (objs_state->ptr->funcs != &drm_dp_mst_topology_state_funcs)
836 *mgr = to_dp_mst_topology_mgr(objs_state->ptr);
838 *old_state = to_dp_mst_topology_state(objs_state->old_state);
840 *new_state = to_dp_mst_topology_state(objs_state->new_state);
846 * for_each_oldnew_mst_mgr_in_state - iterate over all DP MST topology
847 * managers in an atomic update
848 * @__state: &struct drm_atomic_state pointer
849 * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor
850 * @old_state: &struct drm_dp_mst_topology_state iteration cursor for the old
852 * @new_state: &struct drm_dp_mst_topology_state iteration cursor for the new
854 * @__i: int iteration cursor, for macro-internal use
856 * This iterates over all DRM DP MST topology managers in an atomic update,
857 * tracking both old and new state. This is useful in places where the state
858 * delta needs to be considered, for example in atomic check functions.
860 #define for_each_oldnew_mst_mgr_in_state(__state, mgr, old_state, new_state, __i) \
861 for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
862 for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), &(new_state), (__i)))
865 * for_each_old_mst_mgr_in_state - iterate over all DP MST topology managers
866 * in an atomic update
867 * @__state: &struct drm_atomic_state pointer
868 * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor
869 * @old_state: &struct drm_dp_mst_topology_state iteration cursor for the old
871 * @__i: int iteration cursor, for macro-internal use
873 * This iterates over all DRM DP MST topology managers in an atomic update,
874 * tracking only the old state. This is useful in disable functions, where we
875 * need the old state the hardware is still in.
877 #define for_each_old_mst_mgr_in_state(__state, mgr, old_state, __i) \
878 for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
879 for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), NULL, (__i)))
882 * for_each_new_mst_mgr_in_state - iterate over all DP MST topology managers
883 * in an atomic update
884 * @__state: &struct drm_atomic_state pointer
885 * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor
886 * @new_state: &struct drm_dp_mst_topology_state iteration cursor for the new
888 * @__i: int iteration cursor, for macro-internal use
890 * This iterates over all DRM DP MST topology managers in an atomic update,
891 * tracking only the new state. This is useful in enable functions, where we
892 * need the new state the hardware should be in when the atomic commit
893 * operation has completed.
895 #define for_each_new_mst_mgr_in_state(__state, mgr, new_state, __i) \
896 for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
897 for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), NULL, &(new_state), (__i)))