| /* |
| * 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/drm_dp_helper.h> |
| #include <drm/drm_atomic.h> |
| |
| struct drm_dp_mst_branch; |
| |
| /** |
| * struct drm_dp_vcpi - Virtual Channel Payload Identifier |
| * @vcpi: Virtual channel ID. |
| * @pbn: Payload Bandwidth Number for this channel |
| * @aligned_pbn: PBN aligned with slot size |
| * @num_slots: number of slots for this PBN |
| */ |
| struct drm_dp_vcpi { |
| int vcpi; |
| int pbn; |
| int aligned_pbn; |
| int num_slots; |
| }; |
| |
| /** |
| * struct drm_dp_mst_port - MST port |
| * @port_num: port number |
| * @input: if this port is an input port. |
| * @mcs: message capability status - DP 1.2 spec. |
| * @ddps: DisplayPort Device Plug Status - DP 1.2 |
| * @pdt: Peer Device Type |
| * @ldps: Legacy Device Plug Status |
| * @dpcd_rev: DPCD revision of device on this port |
| * @num_sdp_streams: Number of simultaneous streams |
| * @num_sdp_stream_sinks: Number of stream sinks |
| * @available_pbn: Available bandwidth for this port. |
| * @next: link to next port on this branch device |
| * @mstb: branch device attach below this port |
| * @aux: i2c aux transport to talk to device connected to this port. |
| * @parent: branch device parent of this port |
| * @vcpi: Virtual Channel Payload info for this port. |
| * @connector: DRM connector this port is connected to. |
| * @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; |
| |
| 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 available_pbn; |
| struct list_head next; |
| struct drm_dp_mst_branch *mstb; /* pointer to an mstb if this port has one */ |
| struct drm_dp_aux aux; /* i2c bus for this port? */ |
| struct drm_dp_mst_branch *parent; |
| |
| struct drm_dp_vcpi vcpi; |
| 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. |
| */ |
| struct edid *cached_edid; |
| /** |
| * @has_audio: Tracks whether the sink connector to this port is |
| * audio-capable. |
| */ |
| bool has_audio; |
| }; |
| |
| /** |
| * 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. |
| * @msg_slots: one bit per transmitted msg slot. |
| * @ports: linked list of ports on this branch. |
| * @port_parent: pointer to the port parent, NULL if toplevel. |
| * @mgr: topology manager for this branch device. |
| * @tx_slots: transmission slots for this device. |
| * @last_seqno: last sequence number used to talk to this. |
| * @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; |
| |
| u8 rad[8]; |
| u8 lct; |
| int num_ports; |
| |
| int msg_slots; |
| struct list_head ports; |
| |
| /* list of tx ops queue for this port */ |
| struct drm_dp_mst_port *port_parent; |
| struct drm_dp_mst_topology_mgr *mgr; |
| |
| /* slots are protected by mstb->mgr->qlock */ |
| struct drm_dp_sideband_msg_tx *tx_slots[2]; |
| int last_seqno; |
| bool link_address_sent; |
| |
| /* global unique identifier to identify branch devices */ |
| u8 guid[16]; |
| }; |
| |
| |
| /* 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_nak_reply { |
| u8 guid[16]; |
| u8 reason; |
| u8 nak_data; |
| }; |
| |
| struct drm_dp_link_address_ack_reply { |
| u8 guid[16]; |
| 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; |
| u8 peer_guid[16]; |
| 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_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; |
| }; |
| |
| #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 { |
| u8 guid[16]; |
| 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 { |
| 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; |
| }; |
| |
| /* 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; |
| 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; |
| u8 guid[16]; |
| 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; |
| } 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; |
| } 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); |
| void (*register_connector)(struct drm_connector *connector); |
| void (*destroy_connector)(struct drm_dp_mst_topology_mgr *mgr, |
| struct drm_connector *connector); |
| }; |
| |
| #define DP_MAX_PAYLOAD (sizeof(unsigned long) * 8) |
| |
| #define DP_PAYLOAD_LOCAL 1 |
| #define DP_PAYLOAD_REMOTE 2 |
| #define DP_PAYLOAD_DELETE_LOCAL 3 |
| |
| struct drm_dp_payload { |
| int payload_state; |
| int start_slot; |
| int num_slots; |
| int vcpi; |
| }; |
| |
| #define to_dp_mst_topology_state(x) container_of(x, struct drm_dp_mst_topology_state, base) |
| |
| struct drm_dp_vcpi_allocation { |
| struct drm_dp_mst_port *port; |
| int vcpi; |
| struct list_head next; |
| }; |
| |
| struct drm_dp_mst_topology_state { |
| struct drm_private_state base; |
| struct list_head vcpis; |
| struct drm_dp_mst_topology_mgr *mgr; |
| }; |
| |
| #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; |
| |
| /** |
| * @down_rep_recv: Message receiver state for down replies. This and |
| * @up_req_recv are only ever access from the work item, which is |
| * serialised. |
| */ |
| struct drm_dp_sideband_msg_rx down_rep_recv; |
| /** |
| * @up_req_recv: Message receiver state for up requests. This and |
| * @down_rep_recv are only ever access from the work item, which is |
| * serialised. |
| */ |
| struct drm_dp_sideband_msg_rx up_req_recv; |
| |
| /** |
| * @lock: protects mst state, primary, dpcd. |
| */ |
| struct mutex 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; |
| /** |
| * @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; |
| /** |
| * @pbn_div: PBN to slots divisor. |
| */ |
| int pbn_div; |
| |
| /** |
| * @funcs: Atomic helper callbacks |
| */ |
| const struct drm_private_state_funcs *funcs; |
| |
| /** |
| * @qlock: protects @tx_msg_downq, the &drm_dp_mst_branch.txslost and |
| * &drm_dp_sideband_msg_tx.state once they are queued |
| */ |
| struct mutex qlock; |
| /** |
| * @tx_msg_downq: List of pending down replies. |
| */ |
| struct list_head tx_msg_downq; |
| |
| /** |
| * @payload_lock: Protect payload information. |
| */ |
| struct mutex payload_lock; |
| /** |
| * @proposed_vcpis: Array of pointers for the new VCPI allocation. The |
| * VCPI structure itself is &drm_dp_mst_port.vcpi. |
| */ |
| struct drm_dp_vcpi **proposed_vcpis; |
| /** |
| * @payloads: Array of payloads. |
| */ |
| struct drm_dp_payload *payloads; |
| /** |
| * @payload_mask: Elements of @payloads actually in use. Since |
| * reallocation of active outputs isn't possible gaps can be created by |
| * disabling outputs out of order compared to how they've been enabled. |
| */ |
| unsigned long payload_mask; |
| /** |
| * @vcpi_mask: Similar to @payload_mask, but for @proposed_vcpis. |
| */ |
| unsigned long vcpi_mask; |
| |
| /** |
| * @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_connector_list: List of to be destroyed connectors. |
| */ |
| struct list_head destroy_connector_list; |
| /** |
| * @destroy_connector_lock: Protects @connector_list. |
| */ |
| struct mutex destroy_connector_lock; |
| /** |
| * @destroy_connector_work: Work item to destroy connectors. Needed to |
| * avoid locking inversion. |
| */ |
| struct work_struct destroy_connector_work; |
| }; |
| |
| 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); |
| |
| |
| int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state); |
| |
| |
| int drm_dp_mst_hpd_irq(struct drm_dp_mst_topology_mgr *mgr, u8 *esi, bool *handled); |
| |
| |
| enum drm_connector_status drm_dp_mst_detect_port(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); |
| |
| bool drm_dp_mst_port_has_audio(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); |
| |
| |
| int drm_dp_calc_pbn_mode(int clock, int bpp); |
| |
| |
| bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, |
| struct drm_dp_mst_port *port, int pbn, int slots); |
| |
| int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); |
| |
| |
| void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); |
| |
| |
| void drm_dp_mst_deallocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, |
| struct drm_dp_mst_port *port); |
| |
| |
| int drm_dp_find_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, |
| int pbn); |
| |
| |
| int drm_dp_update_payload_part1(struct drm_dp_mst_topology_mgr *mgr); |
| |
| |
| int drm_dp_update_payload_part2(struct drm_dp_mst_topology_mgr *mgr); |
| |
| 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_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); |
| |
| 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); |
| int __must_check |
| drm_dp_atomic_find_vcpi_slots(struct drm_atomic_state *state, |
| struct drm_dp_mst_topology_mgr *mgr, |
| struct drm_dp_mst_port *port, int pbn); |
| int __must_check |
| drm_dp_atomic_release_vcpi_slots(struct drm_atomic_state *state, |
| struct drm_dp_mst_topology_mgr *mgr, |
| struct drm_dp_mst_port *port); |
| int drm_dp_send_power_updown_phy(struct drm_dp_mst_topology_mgr *mgr, |
| struct drm_dp_mst_port *port, bool power_up); |
| int __must_check drm_dp_mst_atomic_check(struct drm_atomic_state *state); |
| |
| 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); |
| |
| 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 |