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sys/dev/drm/core/include/drm/drm_dp_mst_helper.h
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/* | |||||
* 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; | |||||
u8 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 |