/* * Copyright © 2014 Red Hat. * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that copyright * notice and this permission notice appear in supporting documentation, and * that the name of the copyright holders not be used in advertising or * publicity pertaining to distribution of the software without specific, * written prior permission. The copyright holders make no representations * about the suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE * OF THIS SOFTWARE. */ #ifndef _DRM_DP_MST_HELPER_H_ #define _DRM_DP_MST_HELPER_H_ #include <linux/types.h> #include <drm/display/drm_dp_helper.h> #include <drm/drm_atomic.h> #include <drm/drm_fixed.h> #if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS) #include <linux/stackdepot.h> #include <linux/timekeeping.h> enum drm_dp_mst_topology_ref_type { DRM_DP_MST_TOPOLOGY_REF_GET, DRM_DP_MST_TOPOLOGY_REF_PUT, }; struct drm_dp_mst_topology_ref_history { struct drm_dp_mst_topology_ref_entry { enum drm_dp_mst_topology_ref_type type; int count; ktime_t ts_nsec; depot_stack_handle_t backtrace; } *entries; int len; }; #endif /* IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS) */ enum drm_dp_mst_payload_allocation { DRM_DP_MST_PAYLOAD_ALLOCATION_NONE, DRM_DP_MST_PAYLOAD_ALLOCATION_LOCAL, DRM_DP_MST_PAYLOAD_ALLOCATION_DFP, DRM_DP_MST_PAYLOAD_ALLOCATION_REMOTE, }; struct drm_dp_mst_branch; /** * struct drm_dp_mst_port - MST port * @port_num: port number * @input: if this port is an input port. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @mcs: message capability status - DP 1.2 spec. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @ddps: DisplayPort Device Plug Status - DP 1.2. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @pdt: Peer Device Type. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @ldps: Legacy Device Plug Status. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @dpcd_rev: DPCD revision of device on this port. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @num_sdp_streams: Number of simultaneous streams. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @num_sdp_stream_sinks: Number of stream sinks. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @full_pbn: Max possible bandwidth for this port. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @next: link to next port on this branch device * @aux: i2c aux transport to talk to device connected to this port, protected * by &drm_dp_mst_topology_mgr.base.lock. * @passthrough_aux: parent aux to which DSC pass-through requests should be * sent, only set if DSC pass-through is possible. * @parent: branch device parent of this port * @connector: DRM connector this port is connected to. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @mgr: topology manager this port lives under. * * This structure represents an MST port endpoint on a device somewhere * in the MST topology. */ struct drm_dp_mst_port { /** * @topology_kref: refcount for this port's lifetime in the topology, * only the DP MST helpers should need to touch this */ struct kref topology_kref; /** * @malloc_kref: refcount for the memory allocation containing this * structure. See drm_dp_mst_get_port_malloc() and * drm_dp_mst_put_port_malloc(). */ struct kref malloc_kref; #if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS) /** * @topology_ref_history: A history of each topology * reference/dereference. See CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS. */ struct drm_dp_mst_topology_ref_history topology_ref_history; #endif u8 port_num; bool input; bool mcs; bool ddps; u8 pdt; bool ldps; u8 dpcd_rev; u8 num_sdp_streams; u8 num_sdp_stream_sinks; uint16_t full_pbn; struct list_head next; /** * @mstb: the branch device connected to this port, if there is one. * This should be considered protected for reading by * &drm_dp_mst_topology_mgr.lock. There are two exceptions to this: * &drm_dp_mst_topology_mgr.up_req_work and * &drm_dp_mst_topology_mgr.work, which do not grab * &drm_dp_mst_topology_mgr.lock during reads but are the only * updaters of this list and are protected from writing concurrently * by &drm_dp_mst_topology_mgr.probe_lock. */ struct drm_dp_mst_branch *mstb; struct drm_dp_aux aux; /* i2c bus for this port? */ struct drm_dp_aux *passthrough_aux; struct drm_dp_mst_branch *parent; struct drm_connector *connector; struct drm_dp_mst_topology_mgr *mgr; /** * @cached_edid: for DP logical ports - make tiling work by ensuring * that the EDID for all connectors is read immediately. */ const struct drm_edid *cached_edid; /** * @fec_capable: bool indicating if FEC can be supported up to that * point in the MST topology. */ bool fec_capable; }; /* sideband msg header - not bit struct */ struct drm_dp_sideband_msg_hdr { u8 lct; u8 lcr; u8 rad[8]; bool broadcast; bool path_msg; u8 msg_len; bool somt; bool eomt; bool seqno; }; struct drm_dp_sideband_msg_rx { u8 chunk[48]; u8 msg[256]; u8 curchunk_len; u8 curchunk_idx; /* chunk we are parsing now */ u8 curchunk_hdrlen; u8 curlen; /* total length of the msg */ bool have_somt; bool have_eomt; struct drm_dp_sideband_msg_hdr initial_hdr; }; /** * struct drm_dp_mst_branch - MST branch device. * @rad: Relative Address to talk to this branch device. * @lct: Link count total to talk to this branch device. * @num_ports: number of ports on the branch. * @port_parent: pointer to the port parent, NULL if toplevel. * @mgr: topology manager for this branch device. * @link_address_sent: if a link address message has been sent to this device yet. * @guid: guid for DP 1.2 branch device. port under this branch can be * identified by port #. * * This structure represents an MST branch device, there is one * primary branch device at the root, along with any other branches connected * to downstream port of parent branches. */ struct drm_dp_mst_branch { /** * @topology_kref: refcount for this branch device's lifetime in the * topology, only the DP MST helpers should need to touch this */ struct kref topology_kref; /** * @malloc_kref: refcount for the memory allocation containing this * structure. See drm_dp_mst_get_mstb_malloc() and * drm_dp_mst_put_mstb_malloc(). */ struct kref malloc_kref; #if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS) /** * @topology_ref_history: A history of each topology * reference/dereference. See CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS. */ struct drm_dp_mst_topology_ref_history topology_ref_history; #endif /** * @destroy_next: linked-list entry used by * drm_dp_delayed_destroy_work() */ struct list_head destroy_next; /** * @rad: Relative Address of the MST branch. * For &drm_dp_mst_topology_mgr.mst_primary, it's rad[8] are all 0, * unset and unused. For MST branches connected after mst_primary, * in each element of rad[] the nibbles are ordered by the most * signifcant 4 bits first and the least significant 4 bits second. */ u8 rad[8]; u8 lct; int num_ports; /** * @ports: the list of ports on this branch device. This should be * considered protected for reading by &drm_dp_mst_topology_mgr.lock. * There are two exceptions to this: * &drm_dp_mst_topology_mgr.up_req_work and * &drm_dp_mst_topology_mgr.work, which do not grab * &drm_dp_mst_topology_mgr.lock during reads but are the only * updaters of this list and are protected from updating the list * concurrently by @drm_dp_mst_topology_mgr.probe_lock */ struct list_head ports; struct drm_dp_mst_port *port_parent; struct drm_dp_mst_topology_mgr *mgr; bool link_address_sent; /* global unique identifier to identify branch devices */ guid_t guid; }; struct drm_dp_nak_reply { guid_t guid; u8 reason; u8 nak_data; }; struct drm_dp_link_address_ack_reply { guid_t guid; u8 nports; struct drm_dp_link_addr_reply_port { bool input_port; u8 peer_device_type; u8 port_number; bool mcs; bool ddps; bool legacy_device_plug_status; u8 dpcd_revision; guid_t peer_guid; u8 num_sdp_streams; u8 num_sdp_stream_sinks; } ports[16]; }; struct drm_dp_remote_dpcd_read_ack_reply { u8 port_number; u8 num_bytes; u8 bytes[255]; }; struct drm_dp_remote_dpcd_write_ack_reply { u8 port_number; }; struct drm_dp_remote_dpcd_write_nak_reply { u8 port_number; u8 reason; u8 bytes_written_before_failure; }; struct drm_dp_remote_i2c_read_ack_reply { u8 port_number; u8 num_bytes; u8 bytes[255]; }; struct drm_dp_remote_i2c_read_nak_reply { u8 port_number; u8 nak_reason; u8 i2c_nak_transaction; }; struct drm_dp_remote_i2c_write_ack_reply { u8 port_number; }; struct drm_dp_query_stream_enc_status_ack_reply { /* Bit[23:16]- Stream Id */ u8 stream_id; /* Bit[15]- Signed */ bool reply_signed; /* Bit[10:8]- Stream Output Sink Type */ bool unauthorizable_device_present; bool legacy_device_present; bool query_capable_device_present; /* Bit[12:11]- Stream Output CP Type */ bool hdcp_1x_device_present; bool hdcp_2x_device_present; /* Bit[4]- Stream Authentication */ bool auth_completed; /* Bit[3]- Stream Encryption */ bool encryption_enabled; /* Bit[2]- Stream Repeater Function Present */ bool repeater_present; /* Bit[1:0]- Stream State */ u8 state; }; #define DRM_DP_MAX_SDP_STREAMS 16 struct drm_dp_allocate_payload { u8 port_number; u8 number_sdp_streams; u8 vcpi; u16 pbn; u8 sdp_stream_sink[DRM_DP_MAX_SDP_STREAMS]; }; struct drm_dp_allocate_payload_ack_reply { u8 port_number; u8 vcpi; u16 allocated_pbn; }; struct drm_dp_connection_status_notify { guid_t guid; u8 port_number; bool legacy_device_plug_status; bool displayport_device_plug_status; bool message_capability_status; bool input_port; u8 peer_device_type; }; struct drm_dp_remote_dpcd_read { u8 port_number; u32 dpcd_address; u8 num_bytes; }; struct drm_dp_remote_dpcd_write { u8 port_number; u32 dpcd_address; u8 num_bytes; u8 *bytes; }; #define DP_REMOTE_I2C_READ_MAX_TRANSACTIONS 4 struct drm_dp_remote_i2c_read { u8 num_transactions; u8 port_number; struct drm_dp_remote_i2c_read_tx { u8 i2c_dev_id; u8 num_bytes; u8 *bytes; u8 no_stop_bit; u8 i2c_transaction_delay; } transactions[DP_REMOTE_I2C_READ_MAX_TRANSACTIONS]; u8 read_i2c_device_id; u8 num_bytes_read; }; struct drm_dp_remote_i2c_write { u8 port_number; u8 write_i2c_device_id; u8 num_bytes; u8 *bytes; }; struct drm_dp_query_stream_enc_status { u8 stream_id; u8 client_id[7]; /* 56-bit nonce */ u8 stream_event; bool valid_stream_event; u8 stream_behavior; u8 valid_stream_behavior; }; /* this covers ENUM_RESOURCES, POWER_DOWN_PHY, POWER_UP_PHY */ struct drm_dp_port_number_req { u8 port_number; }; struct drm_dp_enum_path_resources_ack_reply { u8 port_number; bool fec_capable; u16 full_payload_bw_number; u16 avail_payload_bw_number; }; /* covers POWER_DOWN_PHY, POWER_UP_PHY */ struct drm_dp_port_number_rep { u8 port_number; }; struct drm_dp_query_payload { u8 port_number; u8 vcpi; }; struct drm_dp_resource_status_notify { u8 port_number; guid_t guid; u16 available_pbn; }; struct drm_dp_query_payload_ack_reply { u8 port_number; u16 allocated_pbn; }; struct drm_dp_sideband_msg_req_body { u8 req_type; union ack_req { struct drm_dp_connection_status_notify conn_stat; struct drm_dp_port_number_req port_num; struct drm_dp_resource_status_notify resource_stat; struct drm_dp_query_payload query_payload; struct drm_dp_allocate_payload allocate_payload; struct drm_dp_remote_dpcd_read dpcd_read; struct drm_dp_remote_dpcd_write dpcd_write; struct drm_dp_remote_i2c_read i2c_read; struct drm_dp_remote_i2c_write i2c_write; struct drm_dp_query_stream_enc_status enc_status; } u; }; struct drm_dp_sideband_msg_reply_body { u8 reply_type; u8 req_type; union ack_replies { struct drm_dp_nak_reply nak; struct drm_dp_link_address_ack_reply link_addr; struct drm_dp_port_number_rep port_number; struct drm_dp_enum_path_resources_ack_reply path_resources; struct drm_dp_allocate_payload_ack_reply allocate_payload; struct drm_dp_query_payload_ack_reply query_payload; struct drm_dp_remote_dpcd_read_ack_reply remote_dpcd_read_ack; struct drm_dp_remote_dpcd_write_ack_reply remote_dpcd_write_ack; struct drm_dp_remote_dpcd_write_nak_reply remote_dpcd_write_nack; struct drm_dp_remote_i2c_read_ack_reply remote_i2c_read_ack; struct drm_dp_remote_i2c_read_nak_reply remote_i2c_read_nack; struct drm_dp_remote_i2c_write_ack_reply remote_i2c_write_ack; struct drm_dp_query_stream_enc_status_ack_reply enc_status; } u; }; /* msg is queued to be put into a slot */ #define DRM_DP_SIDEBAND_TX_QUEUED 0 /* msg has started transmitting on a slot - still on msgq */ #define DRM_DP_SIDEBAND_TX_START_SEND 1 /* msg has finished transmitting on a slot - removed from msgq only in slot */ #define DRM_DP_SIDEBAND_TX_SENT 2 /* msg has received a response - removed from slot */ #define DRM_DP_SIDEBAND_TX_RX 3 #define DRM_DP_SIDEBAND_TX_TIMEOUT 4 struct drm_dp_sideband_msg_tx { u8 msg[256]; u8 chunk[48]; u8 cur_offset; u8 cur_len; struct drm_dp_mst_branch *dst; struct list_head next; int seqno; int state; bool path_msg; struct drm_dp_sideband_msg_reply_body reply; }; /* sideband msg handler */ struct drm_dp_mst_topology_mgr; struct drm_dp_mst_topology_cbs { /* create a connector for a port */ struct drm_connector *(*add_connector)(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *path); /* * Checks for any pending MST interrupts, passing them to MST core for * processing, the same way an HPD IRQ pulse handler would do this. * If provided MST core calls this callback from a poll-waiting loop * when waiting for MST down message replies. The driver is expected * to guard against a race between this callback and the driver's HPD * IRQ pulse handler. */ void (*poll_hpd_irq)(struct drm_dp_mst_topology_mgr *mgr); }; #define to_dp_mst_topology_state(x) container_of(x, struct drm_dp_mst_topology_state, base) /** * struct drm_dp_mst_atomic_payload - Atomic state struct for an MST payload * * The primary atomic state structure for a given MST payload. Stores information like current * bandwidth allocation, intended action for this payload, etc. */ struct drm_dp_mst_atomic_payload { /** @port: The MST port assigned to this payload */ struct drm_dp_mst_port *port; /** * @vc_start_slot: The time slot that this payload starts on. Because payload start slots * can't be determined ahead of time, the contents of this value are UNDEFINED at atomic * check time. This shouldn't usually matter, as the start slot should never be relevant for * atomic state computations. * * Since this value is determined at commit time instead of check time, this value is * protected by the MST helpers ensuring that async commits operating on the given topology * never run in parallel. In the event that a driver does need to read this value (e.g. to * inform hardware of the starting timeslot for a payload), the driver may either: * * * Read this field during the atomic commit after * drm_dp_mst_atomic_wait_for_dependencies() has been called, which will ensure the * previous MST states payload start slots have been copied over to the new state. Note * that a new start slot won't be assigned/removed from this payload until * drm_dp_add_payload_part1()/drm_dp_remove_payload_part2() have been called. * * Acquire the MST modesetting lock, and then wait for any pending MST-related commits to * get committed to hardware by calling drm_crtc_commit_wait() on each of the * &drm_crtc_commit structs in &drm_dp_mst_topology_state.commit_deps. * * If neither of the two above solutions suffice (e.g. the driver needs to read the start * slot in the middle of an atomic commit without waiting for some reason), then drivers * should cache this value themselves after changing payloads. */ s8 vc_start_slot; /** @vcpi: The Virtual Channel Payload Identifier */ u8 vcpi; /** * @time_slots: * The number of timeslots allocated to this payload from the source DP Tx to * the immediate downstream DP Rx */ int time_slots; /** @pbn: The payload bandwidth for this payload */ int pbn; /** @delete: Whether or not we intend to delete this payload during this atomic commit */ bool delete : 1; /** @dsc_enabled: Whether or not this payload has DSC enabled */ bool dsc_enabled : 1; /** @payload_allocation_status: The allocation status of this payload */ enum drm_dp_mst_payload_allocation payload_allocation_status; /** @next: The list node for this payload */ struct list_head next; }; /** * struct drm_dp_mst_topology_state - DisplayPort MST topology atomic state * * This struct represents the atomic state of the toplevel DisplayPort MST manager */ struct drm_dp_mst_topology_state { /** @base: Base private state for atomic */ struct drm_private_state base; /** @mgr: The topology manager */ struct drm_dp_mst_topology_mgr *mgr; /** * @pending_crtc_mask: A bitmask of all CRTCs this topology state touches, drivers may * modify this to add additional dependencies if needed. */ u32 pending_crtc_mask; /** * @commit_deps: A list of all CRTC commits affecting this topology, this field isn't * populated until drm_dp_mst_atomic_wait_for_dependencies() is called. */ struct drm_crtc_commit **commit_deps; /** @num_commit_deps: The number of CRTC commits in @commit_deps */ size_t num_commit_deps; /** @payload_mask: A bitmask of allocated VCPIs, used for VCPI assignments */ u32 payload_mask; /** @payloads: The list of payloads being created/destroyed in this state */ struct list_head payloads; /** @total_avail_slots: The total number of slots this topology can handle (63 or 64) */ u8 total_avail_slots; /** @start_slot: The first usable time slot in this topology (1 or 0) */ u8 start_slot; /** * @pbn_div: The current PBN divisor for this topology. The driver is expected to fill this * out itself. */ fixed20_12 pbn_div; }; #define to_dp_mst_topology_mgr(x) container_of(x, struct drm_dp_mst_topology_mgr, base) /** * struct drm_dp_mst_topology_mgr - DisplayPort MST manager * * This struct represents the toplevel displayport MST topology manager. * There should be one instance of this for every MST capable DP connector * on the GPU. */ struct drm_dp_mst_topology_mgr { /** * @base: Base private object for atomic */ struct drm_private_obj base; /** * @dev: device pointer for adding i2c devices etc. */ struct drm_device *dev; /** * @cbs: callbacks for connector addition and destruction. */ const struct drm_dp_mst_topology_cbs *cbs; /** * @max_dpcd_transaction_bytes: maximum number of bytes to read/write * in one go. */ int max_dpcd_transaction_bytes; /** * @aux: AUX channel for the DP MST connector this topolgy mgr is * controlling. */ struct drm_dp_aux *aux; /** * @max_payloads: maximum number of payloads the GPU can generate. */ int max_payloads; /** * @conn_base_id: DRM connector ID this mgr is connected to. Only used * to build the MST connector path value. */ int conn_base_id; /** * @up_req_recv: Message receiver state for up requests. */ struct drm_dp_sideband_msg_rx up_req_recv; /** * @down_rep_recv: Message receiver state for replies to down * requests. */ struct drm_dp_sideband_msg_rx down_rep_recv; /** * @lock: protects @mst_state, @mst_primary, @dpcd, and * @payload_id_table_cleared. */ struct rwlock lock; /** * @probe_lock: Prevents @work and @up_req_work, the only writers of * &drm_dp_mst_port.mstb and &drm_dp_mst_branch.ports, from racing * while they update the topology. */ struct rwlock probe_lock; /** * @mst_state: If this manager is enabled for an MST capable port. False * if no MST sink/branch devices is connected. */ bool mst_state : 1; /** * @payload_id_table_cleared: Whether or not we've cleared the payload * ID table for @mst_primary. Protected by @lock. */ bool payload_id_table_cleared : 1; /** * @reset_rx_state: The down request's reply and up request message * receiver state must be reset, after the topology manager got * removed. Protected by @lock. */ bool reset_rx_state : 1; /** * @payload_count: The number of currently active payloads in hardware. This value is only * intended to be used internally by MST helpers for payload tracking, and is only safe to * read/write from the atomic commit (not check) context. */ u8 payload_count; /** * @next_start_slot: The starting timeslot to use for new VC payloads. This value is used * internally by MST helpers for payload tracking, and is only safe to read/write from the * atomic commit (not check) context. */ u8 next_start_slot; /** * @mst_primary: Pointer to the primary/first branch device. */ struct drm_dp_mst_branch *mst_primary; /** * @dpcd: Cache of DPCD for primary port. */ u8 dpcd[DP_RECEIVER_CAP_SIZE]; /** * @sink_count: Sink count from DEVICE_SERVICE_IRQ_VECTOR_ESI0. */ u8 sink_count; /** * @funcs: Atomic helper callbacks */ const struct drm_private_state_funcs *funcs; /** * @qlock: protects @tx_msg_downq and &drm_dp_sideband_msg_tx.state */ struct rwlock qlock; /** * @tx_msg_downq: List of pending down requests */ struct list_head tx_msg_downq; /** * @tx_waitq: Wait to queue stall for the tx worker. */ wait_queue_head_t tx_waitq; /** * @work: Probe work. */ struct work_struct work; /** * @tx_work: Sideband transmit worker. This can nest within the main * @work worker for each transaction @work launches. */ struct work_struct tx_work; /** * @destroy_port_list: List of to be destroyed connectors. */ struct list_head destroy_port_list; /** * @destroy_branch_device_list: List of to be destroyed branch * devices. */ struct list_head destroy_branch_device_list; /** * @delayed_destroy_lock: Protects @destroy_port_list and * @destroy_branch_device_list. */ struct rwlock delayed_destroy_lock; /** * @delayed_destroy_wq: Workqueue used for delayed_destroy_work items. * A dedicated WQ makes it possible to drain any requeued work items * on it. */ struct workqueue_struct *delayed_destroy_wq; /** * @delayed_destroy_work: Work item to destroy MST port and branch * devices, needed to avoid locking inversion. */ struct work_struct delayed_destroy_work; /** * @up_req_list: List of pending up requests from the topology that * need to be processed, in chronological order. */ struct list_head up_req_list; /** * @up_req_lock: Protects @up_req_list */ struct rwlock up_req_lock; /** * @up_req_work: Work item to process up requests received from the * topology. Needed to avoid blocking hotplug handling and sideband * transmissions. */ struct work_struct up_req_work; #if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS) /** * @topology_ref_history_lock: protects * &drm_dp_mst_port.topology_ref_history and * &drm_dp_mst_branch.topology_ref_history. */ struct rwlock topology_ref_history_lock; #endif }; int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr, struct drm_device *dev, struct drm_dp_aux *aux, int max_dpcd_transaction_bytes, int max_payloads, int conn_base_id); void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr); /** * enum drm_dp_mst_mode - sink's MST mode capability */ enum drm_dp_mst_mode { /** * @DRM_DP_SST: The sink does not support MST nor single stream sideband * messaging. */ DRM_DP_SST, /** * @DRM_DP_MST: Sink supports MST, more than one stream and single * stream sideband messaging. */ DRM_DP_MST, /** * @DRM_DP_SST_SIDEBAND_MSG: Sink supports only one stream and single * stream sideband messaging. */ DRM_DP_SST_SIDEBAND_MSG, }; enum drm_dp_mst_mode drm_dp_read_mst_cap(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]); int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state); int drm_dp_mst_hpd_irq_handle_event(struct drm_dp_mst_topology_mgr *mgr, const u8 *esi, u8 *ack, bool *handled); void drm_dp_mst_hpd_irq_send_new_request(struct drm_dp_mst_topology_mgr *mgr); int drm_dp_mst_detect_port(struct drm_connector *connector, struct drm_modeset_acquire_ctx *ctx, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); const struct drm_edid *drm_dp_mst_edid_read(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); fixed20_12 drm_dp_get_vc_payload_bw(int link_rate, int link_lane_count); int drm_dp_calc_pbn_mode(int clock, int bpp); void drm_dp_mst_update_slots(struct drm_dp_mst_topology_state *mst_state, uint8_t link_encoding_cap); int drm_dp_add_payload_part1(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_topology_state *mst_state, struct drm_dp_mst_atomic_payload *payload); int drm_dp_add_payload_part2(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_atomic_payload *payload); void drm_dp_remove_payload_part1(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_topology_state *mst_state, struct drm_dp_mst_atomic_payload *payload); void drm_dp_remove_payload_part2(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_topology_state *mst_state, const struct drm_dp_mst_atomic_payload *old_payload, struct drm_dp_mst_atomic_payload *new_payload); int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr); void drm_dp_mst_dump_topology(struct seq_file *m, struct drm_dp_mst_topology_mgr *mgr); void drm_dp_mst_topology_queue_probe(struct drm_dp_mst_topology_mgr *mgr); void drm_dp_mst_topology_mgr_suspend(struct drm_dp_mst_topology_mgr *mgr); int __must_check drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr, bool sync); ssize_t drm_dp_mst_dpcd_read(struct drm_dp_aux *aux, unsigned int offset, void *buffer, size_t size); ssize_t drm_dp_mst_dpcd_write(struct drm_dp_aux *aux, unsigned int offset, void *buffer, size_t size); int drm_dp_mst_connector_late_register(struct drm_connector *connector, struct drm_dp_mst_port *port); void drm_dp_mst_connector_early_unregister(struct drm_connector *connector, struct drm_dp_mst_port *port); struct drm_dp_mst_topology_state * drm_atomic_get_mst_topology_state(struct drm_atomic_state *state, struct drm_dp_mst_topology_mgr *mgr); struct drm_dp_mst_topology_state * drm_atomic_get_old_mst_topology_state(struct drm_atomic_state *state, struct drm_dp_mst_topology_mgr *mgr); struct drm_dp_mst_topology_state * drm_atomic_get_new_mst_topology_state(struct drm_atomic_state *state, struct drm_dp_mst_topology_mgr *mgr); struct drm_dp_mst_atomic_payload * drm_atomic_get_mst_payload_state(struct drm_dp_mst_topology_state *state, struct drm_dp_mst_port *port); bool drm_dp_mst_port_downstream_of_parent(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, struct drm_dp_mst_port *parent); int __must_check drm_dp_atomic_find_time_slots(struct drm_atomic_state *state, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, int pbn); int drm_dp_mst_atomic_enable_dsc(struct drm_atomic_state *state, struct drm_dp_mst_port *port, int pbn, bool enable); int __must_check drm_dp_mst_add_affected_dsc_crtcs(struct drm_atomic_state *state, struct drm_dp_mst_topology_mgr *mgr); int __must_check drm_dp_atomic_release_time_slots(struct drm_atomic_state *state, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); void drm_dp_mst_atomic_wait_for_dependencies(struct drm_atomic_state *state); int __must_check drm_dp_mst_atomic_setup_commit(struct drm_atomic_state *state); int drm_dp_send_power_updown_phy(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, bool power_up); int drm_dp_send_query_stream_enc_status(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, struct drm_dp_query_stream_enc_status_ack_reply *status); int __must_check drm_dp_mst_atomic_check_mgr(struct drm_atomic_state *state, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_topology_state *mst_state, struct drm_dp_mst_port **failing_port); int __must_check drm_dp_mst_atomic_check(struct drm_atomic_state *state); int __must_check drm_dp_mst_root_conn_atomic_check(struct drm_connector_state *new_conn_state, struct drm_dp_mst_topology_mgr *mgr); void drm_dp_mst_get_port_malloc(struct drm_dp_mst_port *port); void drm_dp_mst_put_port_malloc(struct drm_dp_mst_port *port); static inline bool drm_dp_mst_port_is_logical(struct drm_dp_mst_port *port) { return port->port_num >= DP_MST_LOGICAL_PORT_0; } struct drm_dp_aux *drm_dp_mst_aux_for_parent(struct drm_dp_mst_port *port); struct drm_dp_aux *drm_dp_mst_dsc_aux_for_port(struct drm_dp_mst_port *port); static inline struct drm_dp_mst_topology_state * to_drm_dp_mst_topology_state(struct drm_private_state *state) { return container_of(state, struct drm_dp_mst_topology_state, base); } extern const struct drm_private_state_funcs drm_dp_mst_topology_state_funcs; /** * __drm_dp_mst_state_iter_get - private atomic state iterator function for * macro-internal use * @state: &struct drm_atomic_state pointer * @mgr: pointer to the &struct drm_dp_mst_topology_mgr iteration cursor * @old_state: optional pointer to the old &struct drm_dp_mst_topology_state * iteration cursor * @new_state: optional pointer to the new &struct drm_dp_mst_topology_state * iteration cursor * @i: int iteration cursor, for macro-internal use * * Used by for_each_oldnew_mst_mgr_in_state(), * for_each_old_mst_mgr_in_state(), and for_each_new_mst_mgr_in_state(). Don't * call this directly. * * Returns: * True if the current &struct drm_private_obj is a &struct * drm_dp_mst_topology_mgr, false otherwise. */ static inline bool __drm_dp_mst_state_iter_get(struct drm_atomic_state *state, struct drm_dp_mst_topology_mgr **mgr, struct drm_dp_mst_topology_state **old_state, struct drm_dp_mst_topology_state **new_state, int i) { struct __drm_private_objs_state *objs_state = &state->private_objs[i]; if (objs_state->ptr->funcs != &drm_dp_mst_topology_state_funcs) return false; *mgr = to_dp_mst_topology_mgr(objs_state->ptr); if (old_state) *old_state = to_dp_mst_topology_state(objs_state->old_state); if (new_state) *new_state = to_dp_mst_topology_state(objs_state->new_state); return true; } /** * for_each_oldnew_mst_mgr_in_state - iterate over all DP MST topology * managers in an atomic update * @__state: &struct drm_atomic_state pointer * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor * @old_state: &struct drm_dp_mst_topology_state iteration cursor for the old * state * @new_state: &struct drm_dp_mst_topology_state iteration cursor for the new * state * @__i: int iteration cursor, for macro-internal use * * This iterates over all DRM DP MST topology managers in an atomic update, * tracking both old and new state. This is useful in places where the state * delta needs to be considered, for example in atomic check functions. */ #define for_each_oldnew_mst_mgr_in_state(__state, mgr, old_state, new_state, __i) \ for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \ for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), &(new_state), (__i))) /** * for_each_old_mst_mgr_in_state - iterate over all DP MST topology managers * in an atomic update * @__state: &struct drm_atomic_state pointer * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor * @old_state: &struct drm_dp_mst_topology_state iteration cursor for the old * state * @__i: int iteration cursor, for macro-internal use * * This iterates over all DRM DP MST topology managers in an atomic update, * tracking only the old state. This is useful in disable functions, where we * need the old state the hardware is still in. */ #define for_each_old_mst_mgr_in_state(__state, mgr, old_state, __i) \ for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \ for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), NULL, (__i))) /** * for_each_new_mst_mgr_in_state - iterate over all DP MST topology managers * in an atomic update * @__state: &struct drm_atomic_state pointer * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor * @new_state: &struct drm_dp_mst_topology_state iteration cursor for the new * state * @__i: int iteration cursor, for macro-internal use * * This iterates over all DRM DP MST topology managers in an atomic update, * tracking only the new state. This is useful in enable functions, where we * need the new state the hardware should be in when the atomic commit * operation has completed. */ #define for_each_new_mst_mgr_in_state(__state, mgr, new_state, __i) \ for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \ for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), NULL, &(new_state), (__i))) #endif
