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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 * @full_pbn: Max possible 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;
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
161 * @fec_capable: bool indicating if FEC can be supported up to that
162 * point in the MST topology.
167 /* sideband msg header - not bit struct */
168 struct drm_dp_sideband_msg_hdr {
180 struct drm_dp_sideband_msg_rx {
184 u8 curchunk_idx; /* chunk we are parsing now */
186 u8 curlen; /* total length of the msg */
189 struct drm_dp_sideband_msg_hdr initial_hdr;
193 * struct drm_dp_mst_branch - MST branch device.
194 * @rad: Relative Address to talk to this branch device.
195 * @lct: Link count total to talk to this branch device.
196 * @num_ports: number of ports on the branch.
197 * @msg_slots: one bit per transmitted msg slot.
198 * @port_parent: pointer to the port parent, NULL if toplevel.
199 * @mgr: topology manager for this branch device.
200 * @tx_slots: transmission slots for this device.
201 * @last_seqno: last sequence number used to talk to this.
202 * @link_address_sent: if a link address message has been sent to this device yet.
203 * @guid: guid for DP 1.2 branch device. port under this branch can be
204 * identified by port #.
206 * This structure represents an MST branch device, there is one
207 * primary branch device at the root, along with any other branches connected
208 * to downstream port of parent branches.
210 struct drm_dp_mst_branch {
212 * @topology_kref: refcount for this branch device's lifetime in the
213 * topology, only the DP MST helpers should need to touch this
215 struct kref topology_kref;
218 * @malloc_kref: refcount for the memory allocation containing this
219 * structure. See drm_dp_mst_get_mstb_malloc() and
220 * drm_dp_mst_put_mstb_malloc().
222 struct kref malloc_kref;
224 #if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)
226 * @topology_ref_history: A history of each topology
227 * reference/dereference. See CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS.
229 struct drm_dp_mst_topology_ref_history topology_ref_history;
233 * @destroy_next: linked-list entry used by
234 * drm_dp_delayed_destroy_work()
236 struct list_head destroy_next;
244 * @ports: the list of ports on this branch device. This should be
245 * considered protected for reading by &drm_dp_mst_topology_mgr.lock.
246 * There are two exceptions to this:
247 * &drm_dp_mst_topology_mgr.up_req_work and
248 * &drm_dp_mst_topology_mgr.work, which do not grab
249 * &drm_dp_mst_topology_mgr.lock during reads but are the only
250 * updaters of this list and are protected from updating the list
251 * concurrently by @drm_dp_mst_topology_mgr.probe_lock
253 struct list_head ports;
255 /* list of tx ops queue for this port */
256 struct drm_dp_mst_port *port_parent;
257 struct drm_dp_mst_topology_mgr *mgr;
259 /* slots are protected by mstb->mgr->qlock */
260 struct drm_dp_sideband_msg_tx *tx_slots[2];
262 bool link_address_sent;
265 * @down_rep_recv: Message receiver state for down replies.
267 struct drm_dp_sideband_msg_rx down_rep_recv[2];
269 /* global unique identifier to identify branch devices */
274 struct drm_dp_nak_reply {
280 struct drm_dp_link_address_ack_reply {
283 struct drm_dp_link_addr_reply_port {
289 bool legacy_device_plug_status;
293 u8 num_sdp_stream_sinks;
297 struct drm_dp_remote_dpcd_read_ack_reply {
303 struct drm_dp_remote_dpcd_write_ack_reply {
307 struct drm_dp_remote_dpcd_write_nak_reply {
310 u8 bytes_written_before_failure;
313 struct drm_dp_remote_i2c_read_ack_reply {
319 struct drm_dp_remote_i2c_read_nak_reply {
322 u8 i2c_nak_transaction;
325 struct drm_dp_remote_i2c_write_ack_reply {
330 #define DRM_DP_MAX_SDP_STREAMS 16
331 struct drm_dp_allocate_payload {
333 u8 number_sdp_streams;
336 u8 sdp_stream_sink[DRM_DP_MAX_SDP_STREAMS];
339 struct drm_dp_allocate_payload_ack_reply {
345 struct drm_dp_connection_status_notify {
348 bool legacy_device_plug_status;
349 bool displayport_device_plug_status;
350 bool message_capability_status;
355 struct drm_dp_remote_dpcd_read {
361 struct drm_dp_remote_dpcd_write {
368 #define DP_REMOTE_I2C_READ_MAX_TRANSACTIONS 4
369 struct drm_dp_remote_i2c_read {
372 struct drm_dp_remote_i2c_read_tx {
377 u8 i2c_transaction_delay;
378 } transactions[DP_REMOTE_I2C_READ_MAX_TRANSACTIONS];
379 u8 read_i2c_device_id;
383 struct drm_dp_remote_i2c_write {
385 u8 write_i2c_device_id;
390 /* this covers ENUM_RESOURCES, POWER_DOWN_PHY, POWER_UP_PHY */
391 struct drm_dp_port_number_req {
395 struct drm_dp_enum_path_resources_ack_reply {
398 u16 full_payload_bw_number;
399 u16 avail_payload_bw_number;
402 /* covers POWER_DOWN_PHY, POWER_UP_PHY */
403 struct drm_dp_port_number_rep {
407 struct drm_dp_query_payload {
412 struct drm_dp_resource_status_notify {
418 struct drm_dp_query_payload_ack_reply {
423 struct drm_dp_sideband_msg_req_body {
426 struct drm_dp_connection_status_notify conn_stat;
427 struct drm_dp_port_number_req port_num;
428 struct drm_dp_resource_status_notify resource_stat;
430 struct drm_dp_query_payload query_payload;
431 struct drm_dp_allocate_payload allocate_payload;
433 struct drm_dp_remote_dpcd_read dpcd_read;
434 struct drm_dp_remote_dpcd_write dpcd_write;
436 struct drm_dp_remote_i2c_read i2c_read;
437 struct drm_dp_remote_i2c_write i2c_write;
441 struct drm_dp_sideband_msg_reply_body {
445 struct drm_dp_nak_reply nak;
446 struct drm_dp_link_address_ack_reply link_addr;
447 struct drm_dp_port_number_rep port_number;
449 struct drm_dp_enum_path_resources_ack_reply path_resources;
450 struct drm_dp_allocate_payload_ack_reply allocate_payload;
451 struct drm_dp_query_payload_ack_reply query_payload;
453 struct drm_dp_remote_dpcd_read_ack_reply remote_dpcd_read_ack;
454 struct drm_dp_remote_dpcd_write_ack_reply remote_dpcd_write_ack;
455 struct drm_dp_remote_dpcd_write_nak_reply remote_dpcd_write_nack;
457 struct drm_dp_remote_i2c_read_ack_reply remote_i2c_read_ack;
458 struct drm_dp_remote_i2c_read_nak_reply remote_i2c_read_nack;
459 struct drm_dp_remote_i2c_write_ack_reply remote_i2c_write_ack;
463 /* msg is queued to be put into a slot */
464 #define DRM_DP_SIDEBAND_TX_QUEUED 0
465 /* msg has started transmitting on a slot - still on msgq */
466 #define DRM_DP_SIDEBAND_TX_START_SEND 1
467 /* msg has finished transmitting on a slot - removed from msgq only in slot */
468 #define DRM_DP_SIDEBAND_TX_SENT 2
469 /* msg has received a response - removed from slot */
470 #define DRM_DP_SIDEBAND_TX_RX 3
471 #define DRM_DP_SIDEBAND_TX_TIMEOUT 4
473 struct drm_dp_sideband_msg_tx {
478 struct drm_dp_mst_branch *dst;
479 struct list_head next;
483 struct drm_dp_sideband_msg_reply_body reply;
486 /* sideband msg handler */
487 struct drm_dp_mst_topology_mgr;
488 struct drm_dp_mst_topology_cbs {
489 /* create a connector for a port */
490 struct drm_connector *(*add_connector)(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *path);
493 #define DP_MAX_PAYLOAD (sizeof(unsigned long) * 8)
495 #define DP_PAYLOAD_LOCAL 1
496 #define DP_PAYLOAD_REMOTE 2
497 #define DP_PAYLOAD_DELETE_LOCAL 3
499 struct drm_dp_payload {
506 #define to_dp_mst_topology_state(x) container_of(x, struct drm_dp_mst_topology_state, base)
508 struct drm_dp_vcpi_allocation {
509 struct drm_dp_mst_port *port;
513 struct list_head next;
516 struct drm_dp_mst_topology_state {
517 struct drm_private_state base;
518 struct list_head vcpis;
519 struct drm_dp_mst_topology_mgr *mgr;
522 #define to_dp_mst_topology_mgr(x) container_of(x, struct drm_dp_mst_topology_mgr, base)
525 * struct drm_dp_mst_topology_mgr - DisplayPort MST manager
527 * This struct represents the toplevel displayport MST topology manager.
528 * There should be one instance of this for every MST capable DP connector
531 struct drm_dp_mst_topology_mgr {
533 * @base: Base private object for atomic
535 struct drm_private_obj base;
538 * @dev: device pointer for adding i2c devices etc.
540 struct drm_device *dev;
542 * @cbs: callbacks for connector addition and destruction.
544 const struct drm_dp_mst_topology_cbs *cbs;
546 * @max_dpcd_transaction_bytes: maximum number of bytes to read/write
549 int max_dpcd_transaction_bytes;
551 * @aux: AUX channel for the DP MST connector this topolgy mgr is
554 struct drm_dp_aux *aux;
556 * @max_payloads: maximum number of payloads the GPU can generate.
560 * @conn_base_id: DRM connector ID this mgr is connected to. Only used
561 * to build the MST connector path value.
566 * @up_req_recv: Message receiver state for up requests.
568 struct drm_dp_sideband_msg_rx up_req_recv;
571 * @lock: protects @mst_state, @mst_primary, @dpcd, and
572 * @payload_id_table_cleared.
577 * @probe_lock: Prevents @work and @up_req_work, the only writers of
578 * &drm_dp_mst_port.mstb and &drm_dp_mst_branch.ports, from racing
579 * while they update the topology.
581 struct mutex probe_lock;
584 * @mst_state: If this manager is enabled for an MST capable port. False
585 * if no MST sink/branch devices is connected.
590 * @payload_id_table_cleared: Whether or not we've cleared the payload
591 * ID table for @mst_primary. Protected by @lock.
593 bool payload_id_table_cleared : 1;
596 * @mst_primary: Pointer to the primary/first branch device.
598 struct drm_dp_mst_branch *mst_primary;
601 * @dpcd: Cache of DPCD for primary port.
603 u8 dpcd[DP_RECEIVER_CAP_SIZE];
605 * @sink_count: Sink count from DEVICE_SERVICE_IRQ_VECTOR_ESI0.
609 * @pbn_div: PBN to slots divisor.
614 * @funcs: Atomic helper callbacks
616 const struct drm_private_state_funcs *funcs;
619 * @qlock: protects @tx_msg_downq, the &drm_dp_mst_branch.txslost and
620 * &drm_dp_sideband_msg_tx.state once they are queued
625 * @tx_msg_downq: List of pending down replies.
627 struct list_head tx_msg_downq;
630 * @payload_lock: Protect payload information.
632 struct mutex payload_lock;
634 * @proposed_vcpis: Array of pointers for the new VCPI allocation. The
635 * VCPI structure itself is &drm_dp_mst_port.vcpi, and the size of
636 * this array is determined by @max_payloads.
638 struct drm_dp_vcpi **proposed_vcpis;
640 * @payloads: Array of payloads. The size of this array is determined
643 struct drm_dp_payload *payloads;
645 * @payload_mask: Elements of @payloads actually in use. Since
646 * reallocation of active outputs isn't possible gaps can be created by
647 * disabling outputs out of order compared to how they've been enabled.
649 unsigned long payload_mask;
651 * @vcpi_mask: Similar to @payload_mask, but for @proposed_vcpis.
653 unsigned long vcpi_mask;
656 * @tx_waitq: Wait to queue stall for the tx worker.
658 wait_queue_head_t tx_waitq;
662 struct work_struct work;
664 * @tx_work: Sideband transmit worker. This can nest within the main
665 * @work worker for each transaction @work launches.
667 struct work_struct tx_work;
670 * @destroy_port_list: List of to be destroyed connectors.
672 struct list_head destroy_port_list;
674 * @destroy_branch_device_list: List of to be destroyed branch
677 struct list_head destroy_branch_device_list;
679 * @delayed_destroy_lock: Protects @destroy_port_list and
680 * @destroy_branch_device_list.
682 struct mutex delayed_destroy_lock;
684 * @delayed_destroy_work: Work item to destroy MST port and branch
685 * devices, needed to avoid locking inversion.
687 struct work_struct delayed_destroy_work;
690 * @up_req_list: List of pending up requests from the topology that
691 * need to be processed, in chronological order.
693 struct list_head up_req_list;
695 * @up_req_lock: Protects @up_req_list
697 struct mutex up_req_lock;
699 * @up_req_work: Work item to process up requests received from the
700 * topology. Needed to avoid blocking hotplug handling and sideband
703 struct work_struct up_req_work;
705 #if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)
707 * @topology_ref_history_lock: protects
708 * &drm_dp_mst_port.topology_ref_history and
709 * &drm_dp_mst_branch.topology_ref_history.
711 struct mutex topology_ref_history_lock;
715 int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr,
716 struct drm_device *dev, struct drm_dp_aux *aux,
717 int max_dpcd_transaction_bytes,
718 int max_payloads, int conn_base_id);
720 void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr);
723 int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state);
726 int drm_dp_mst_hpd_irq(struct drm_dp_mst_topology_mgr *mgr, u8 *esi, bool *handled);
730 drm_dp_mst_detect_port(struct drm_connector *connector,
731 struct drm_modeset_acquire_ctx *ctx,
732 struct drm_dp_mst_topology_mgr *mgr,
733 struct drm_dp_mst_port *port);
735 struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
738 int drm_dp_calc_pbn_mode(int clock, int bpp, bool dsc);
740 bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr,
741 struct drm_dp_mst_port *port, int pbn, int slots);
743 int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
746 void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
749 void drm_dp_mst_deallocate_vcpi(struct drm_dp_mst_topology_mgr *mgr,
750 struct drm_dp_mst_port *port);
753 int drm_dp_find_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr,
757 int drm_dp_update_payload_part1(struct drm_dp_mst_topology_mgr *mgr);
760 int drm_dp_update_payload_part2(struct drm_dp_mst_topology_mgr *mgr);
762 int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr);
764 void drm_dp_mst_dump_topology(struct seq_file *m,
765 struct drm_dp_mst_topology_mgr *mgr);
767 void drm_dp_mst_topology_mgr_suspend(struct drm_dp_mst_topology_mgr *mgr);
769 drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr,
772 ssize_t drm_dp_mst_dpcd_read(struct drm_dp_aux *aux,
773 unsigned int offset, void *buffer, size_t size);
774 ssize_t drm_dp_mst_dpcd_write(struct drm_dp_aux *aux,
775 unsigned int offset, void *buffer, size_t size);
777 int drm_dp_mst_connector_late_register(struct drm_connector *connector,
778 struct drm_dp_mst_port *port);
779 void drm_dp_mst_connector_early_unregister(struct drm_connector *connector,
780 struct drm_dp_mst_port *port);
782 struct drm_dp_mst_topology_state *drm_atomic_get_mst_topology_state(struct drm_atomic_state *state,
783 struct drm_dp_mst_topology_mgr *mgr);
785 drm_dp_atomic_find_vcpi_slots(struct drm_atomic_state *state,
786 struct drm_dp_mst_topology_mgr *mgr,
787 struct drm_dp_mst_port *port, int pbn,
789 int drm_dp_mst_atomic_enable_dsc(struct drm_atomic_state *state,
790 struct drm_dp_mst_port *port,
791 int pbn, int pbn_div,
794 drm_dp_mst_add_affected_dsc_crtcs(struct drm_atomic_state *state,
795 struct drm_dp_mst_topology_mgr *mgr);
797 drm_dp_atomic_release_vcpi_slots(struct drm_atomic_state *state,
798 struct drm_dp_mst_topology_mgr *mgr,
799 struct drm_dp_mst_port *port);
800 int drm_dp_send_power_updown_phy(struct drm_dp_mst_topology_mgr *mgr,
801 struct drm_dp_mst_port *port, bool power_up);
802 int __must_check drm_dp_mst_atomic_check(struct drm_atomic_state *state);
804 void drm_dp_mst_get_port_malloc(struct drm_dp_mst_port *port);
805 void drm_dp_mst_put_port_malloc(struct drm_dp_mst_port *port);
807 struct drm_dp_aux *drm_dp_mst_dsc_aux_for_port(struct drm_dp_mst_port *port);
809 extern const struct drm_private_state_funcs drm_dp_mst_topology_state_funcs;
812 * __drm_dp_mst_state_iter_get - private atomic state iterator function for
814 * @state: &struct drm_atomic_state pointer
815 * @mgr: pointer to the &struct drm_dp_mst_topology_mgr iteration cursor
816 * @old_state: optional pointer to the old &struct drm_dp_mst_topology_state
818 * @new_state: optional pointer to the new &struct drm_dp_mst_topology_state
820 * @i: int iteration cursor, for macro-internal use
822 * Used by for_each_oldnew_mst_mgr_in_state(),
823 * for_each_old_mst_mgr_in_state(), and for_each_new_mst_mgr_in_state(). Don't
824 * call this directly.
827 * True if the current &struct drm_private_obj is a &struct
828 * drm_dp_mst_topology_mgr, false otherwise.
831 __drm_dp_mst_state_iter_get(struct drm_atomic_state *state,
832 struct drm_dp_mst_topology_mgr **mgr,
833 struct drm_dp_mst_topology_state **old_state,
834 struct drm_dp_mst_topology_state **new_state,
837 struct __drm_private_objs_state *objs_state = &state->private_objs[i];
839 if (objs_state->ptr->funcs != &drm_dp_mst_topology_state_funcs)
842 *mgr = to_dp_mst_topology_mgr(objs_state->ptr);
844 *old_state = to_dp_mst_topology_state(objs_state->old_state);
846 *new_state = to_dp_mst_topology_state(objs_state->new_state);
852 * for_each_oldnew_mst_mgr_in_state - iterate over all DP MST topology
853 * managers in an atomic update
854 * @__state: &struct drm_atomic_state pointer
855 * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor
856 * @old_state: &struct drm_dp_mst_topology_state iteration cursor for the old
858 * @new_state: &struct drm_dp_mst_topology_state iteration cursor for the new
860 * @__i: int iteration cursor, for macro-internal use
862 * This iterates over all DRM DP MST topology managers in an atomic update,
863 * tracking both old and new state. This is useful in places where the state
864 * delta needs to be considered, for example in atomic check functions.
866 #define for_each_oldnew_mst_mgr_in_state(__state, mgr, old_state, new_state, __i) \
867 for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
868 for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), &(new_state), (__i)))
871 * for_each_old_mst_mgr_in_state - iterate over all DP MST topology managers
872 * in an atomic update
873 * @__state: &struct drm_atomic_state pointer
874 * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor
875 * @old_state: &struct drm_dp_mst_topology_state iteration cursor for the old
877 * @__i: int iteration cursor, for macro-internal use
879 * This iterates over all DRM DP MST topology managers in an atomic update,
880 * tracking only the old state. This is useful in disable functions, where we
881 * need the old state the hardware is still in.
883 #define for_each_old_mst_mgr_in_state(__state, mgr, old_state, __i) \
884 for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
885 for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), NULL, (__i)))
888 * for_each_new_mst_mgr_in_state - iterate over all DP MST topology managers
889 * in an atomic update
890 * @__state: &struct drm_atomic_state pointer
891 * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor
892 * @new_state: &struct drm_dp_mst_topology_state iteration cursor for the new
894 * @__i: int iteration cursor, for macro-internal use
896 * This iterates over all DRM DP MST topology managers in an atomic update,
897 * tracking only the new state. This is useful in enable functions, where we
898 * need the new state the hardware should be in when the atomic commit
899 * operation has completed.
901 #define for_each_new_mst_mgr_in_state(__state, mgr, new_state, __i) \
902 for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
903 for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), NULL, &(new_state), (__i)))