124edb884SFrançois Tigeot /* 224edb884SFrançois Tigeot * Copyright © 2014 Red Hat. 324edb884SFrançois Tigeot * 424edb884SFrançois Tigeot * Permission to use, copy, modify, distribute, and sell this software and its 524edb884SFrançois Tigeot * documentation for any purpose is hereby granted without fee, provided that 624edb884SFrançois Tigeot * the above copyright notice appear in all copies and that both that copyright 724edb884SFrançois Tigeot * notice and this permission notice appear in supporting documentation, and 824edb884SFrançois Tigeot * that the name of the copyright holders not be used in advertising or 924edb884SFrançois Tigeot * publicity pertaining to distribution of the software without specific, 1024edb884SFrançois Tigeot * written prior permission. The copyright holders make no representations 1124edb884SFrançois Tigeot * about the suitability of this software for any purpose. It is provided "as 1224edb884SFrançois Tigeot * is" without express or implied warranty. 1324edb884SFrançois Tigeot * 1424edb884SFrançois Tigeot * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 1524edb884SFrançois Tigeot * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 1624edb884SFrançois Tigeot * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 1724edb884SFrançois Tigeot * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 1824edb884SFrançois Tigeot * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 1924edb884SFrançois Tigeot * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 2024edb884SFrançois Tigeot * OF THIS SOFTWARE. 2124edb884SFrançois Tigeot */ 2224edb884SFrançois Tigeot #ifndef _DRM_DP_MST_HELPER_H_ 2324edb884SFrançois Tigeot #define _DRM_DP_MST_HELPER_H_ 2424edb884SFrançois Tigeot 2524edb884SFrançois Tigeot #include <linux/types.h> 2624edb884SFrançois Tigeot #include <drm/drm_dp_helper.h> 27*3f2dd94aSFrançois Tigeot #include <drm/drm_atomic.h> 2824edb884SFrançois Tigeot 2924edb884SFrançois Tigeot struct drm_dp_mst_branch; 3024edb884SFrançois Tigeot 3124edb884SFrançois Tigeot /** 322c9916cdSFrançois Tigeot * struct drm_dp_vcpi - Virtual Channel Payload Identifier 3324edb884SFrançois Tigeot * @vcpi: Virtual channel ID. 3424edb884SFrançois Tigeot * @pbn: Payload Bandwidth Number for this channel 3524edb884SFrançois Tigeot * @aligned_pbn: PBN aligned with slot size 3624edb884SFrançois Tigeot * @num_slots: number of slots for this PBN 3724edb884SFrançois Tigeot */ 3824edb884SFrançois Tigeot struct drm_dp_vcpi { 3924edb884SFrançois Tigeot int vcpi; 4024edb884SFrançois Tigeot int pbn; 4124edb884SFrançois Tigeot int aligned_pbn; 4224edb884SFrançois Tigeot int num_slots; 4324edb884SFrançois Tigeot }; 4424edb884SFrançois Tigeot 4524edb884SFrançois Tigeot /** 4624edb884SFrançois Tigeot * struct drm_dp_mst_port - MST port 4724edb884SFrançois Tigeot * @kref: reference count for this port. 4824edb884SFrançois Tigeot * @port_num: port number 4924edb884SFrançois Tigeot * @input: if this port is an input port. 5024edb884SFrançois Tigeot * @mcs: message capability status - DP 1.2 spec. 5124edb884SFrançois Tigeot * @ddps: DisplayPort Device Plug Status - DP 1.2 5224edb884SFrançois Tigeot * @pdt: Peer Device Type 5324edb884SFrançois Tigeot * @ldps: Legacy Device Plug Status 5424edb884SFrançois Tigeot * @dpcd_rev: DPCD revision of device on this port 5524edb884SFrançois Tigeot * @num_sdp_streams: Number of simultaneous streams 5624edb884SFrançois Tigeot * @num_sdp_stream_sinks: Number of stream sinks 5724edb884SFrançois Tigeot * @available_pbn: Available bandwidth for this port. 5824edb884SFrançois Tigeot * @next: link to next port on this branch device 5924edb884SFrançois Tigeot * @mstb: branch device attach below this port 6024edb884SFrançois Tigeot * @aux: i2c aux transport to talk to device connected to this port. 6124edb884SFrançois Tigeot * @parent: branch device parent of this port 6224edb884SFrançois Tigeot * @vcpi: Virtual Channel Payload info for this port. 6324edb884SFrançois Tigeot * @connector: DRM connector this port is connected to. 6424edb884SFrançois Tigeot * @mgr: topology manager this port lives under. 6524edb884SFrançois Tigeot * 6624edb884SFrançois Tigeot * This structure represents an MST port endpoint on a device somewhere 6724edb884SFrançois Tigeot * in the MST topology. 6824edb884SFrançois Tigeot */ 6924edb884SFrançois Tigeot struct drm_dp_mst_port { 7024edb884SFrançois Tigeot struct kref kref; 7124edb884SFrançois Tigeot 7224edb884SFrançois Tigeot u8 port_num; 7324edb884SFrançois Tigeot bool input; 7424edb884SFrançois Tigeot bool mcs; 7524edb884SFrançois Tigeot bool ddps; 7624edb884SFrançois Tigeot u8 pdt; 7724edb884SFrançois Tigeot bool ldps; 7824edb884SFrançois Tigeot u8 dpcd_rev; 7924edb884SFrançois Tigeot u8 num_sdp_streams; 8024edb884SFrançois Tigeot u8 num_sdp_stream_sinks; 8124edb884SFrançois Tigeot uint16_t available_pbn; 8224edb884SFrançois Tigeot struct list_head next; 8324edb884SFrançois Tigeot struct drm_dp_mst_branch *mstb; /* pointer to an mstb if this port has one */ 8424edb884SFrançois Tigeot struct drm_dp_aux aux; /* i2c bus for this port? */ 8524edb884SFrançois Tigeot struct drm_dp_mst_branch *parent; 8624edb884SFrançois Tigeot 8724edb884SFrançois Tigeot struct drm_dp_vcpi vcpi; 8824edb884SFrançois Tigeot struct drm_connector *connector; 8924edb884SFrançois Tigeot struct drm_dp_mst_topology_mgr *mgr; 902c9916cdSFrançois Tigeot 911dedbd3bSFrançois Tigeot /** 921dedbd3bSFrançois Tigeot * @cached_edid: for DP logical ports - make tiling work by ensuring 931dedbd3bSFrançois Tigeot * that the EDID for all connectors is read immediately. 941dedbd3bSFrançois Tigeot */ 951dedbd3bSFrançois Tigeot struct edid *cached_edid; 961dedbd3bSFrançois Tigeot /** 971dedbd3bSFrançois Tigeot * @has_audio: Tracks whether the sink connector to this port is 981dedbd3bSFrançois Tigeot * audio-capable. 991dedbd3bSFrançois Tigeot */ 100aee94f86SFrançois Tigeot bool has_audio; 10124edb884SFrançois Tigeot }; 10224edb884SFrançois Tigeot 10324edb884SFrançois Tigeot /** 10424edb884SFrançois Tigeot * struct drm_dp_mst_branch - MST branch device. 10524edb884SFrançois Tigeot * @kref: reference count for this port. 10624edb884SFrançois Tigeot * @rad: Relative Address to talk to this branch device. 10724edb884SFrançois Tigeot * @lct: Link count total to talk to this branch device. 10824edb884SFrançois Tigeot * @num_ports: number of ports on the branch. 10924edb884SFrançois Tigeot * @msg_slots: one bit per transmitted msg slot. 11024edb884SFrançois Tigeot * @ports: linked list of ports on this branch. 11124edb884SFrançois Tigeot * @port_parent: pointer to the port parent, NULL if toplevel. 11224edb884SFrançois Tigeot * @mgr: topology manager for this branch device. 11324edb884SFrançois Tigeot * @tx_slots: transmission slots for this device. 11424edb884SFrançois Tigeot * @last_seqno: last sequence number used to talk to this. 11524edb884SFrançois Tigeot * @link_address_sent: if a link address message has been sent to this device yet. 116aee94f86SFrançois Tigeot * @guid: guid for DP 1.2 branch device. port under this branch can be 117aee94f86SFrançois Tigeot * identified by port #. 11824edb884SFrançois Tigeot * 11924edb884SFrançois Tigeot * This structure represents an MST branch device, there is one 120aee94f86SFrançois Tigeot * primary branch device at the root, along with any other branches connected 121aee94f86SFrançois Tigeot * to downstream port of parent branches. 12224edb884SFrançois Tigeot */ 12324edb884SFrançois Tigeot struct drm_dp_mst_branch { 12424edb884SFrançois Tigeot struct kref kref; 12524edb884SFrançois Tigeot u8 rad[8]; 12624edb884SFrançois Tigeot u8 lct; 12724edb884SFrançois Tigeot int num_ports; 12824edb884SFrançois Tigeot 12924edb884SFrançois Tigeot int msg_slots; 13024edb884SFrançois Tigeot struct list_head ports; 13124edb884SFrançois Tigeot 13224edb884SFrançois Tigeot /* list of tx ops queue for this port */ 13324edb884SFrançois Tigeot struct drm_dp_mst_port *port_parent; 13424edb884SFrançois Tigeot struct drm_dp_mst_topology_mgr *mgr; 13524edb884SFrançois Tigeot 13624edb884SFrançois Tigeot /* slots are protected by mstb->mgr->qlock */ 13724edb884SFrançois Tigeot struct drm_dp_sideband_msg_tx *tx_slots[2]; 13824edb884SFrançois Tigeot int last_seqno; 13924edb884SFrançois Tigeot bool link_address_sent; 140aee94f86SFrançois Tigeot 141aee94f86SFrançois Tigeot /* global unique identifier to identify branch devices */ 142aee94f86SFrançois Tigeot u8 guid[16]; 14324edb884SFrançois Tigeot }; 14424edb884SFrançois Tigeot 14524edb884SFrançois Tigeot 14624edb884SFrançois Tigeot /* sideband msg header - not bit struct */ 14724edb884SFrançois Tigeot struct drm_dp_sideband_msg_hdr { 14824edb884SFrançois Tigeot u8 lct; 14924edb884SFrançois Tigeot u8 lcr; 15024edb884SFrançois Tigeot u8 rad[8]; 15124edb884SFrançois Tigeot bool broadcast; 15224edb884SFrançois Tigeot bool path_msg; 15324edb884SFrançois Tigeot u8 msg_len; 15424edb884SFrançois Tigeot bool somt; 15524edb884SFrançois Tigeot bool eomt; 15624edb884SFrançois Tigeot bool seqno; 15724edb884SFrançois Tigeot }; 15824edb884SFrançois Tigeot 15924edb884SFrançois Tigeot struct drm_dp_nak_reply { 16024edb884SFrançois Tigeot u8 guid[16]; 16124edb884SFrançois Tigeot u8 reason; 16224edb884SFrançois Tigeot u8 nak_data; 16324edb884SFrançois Tigeot }; 16424edb884SFrançois Tigeot 16524edb884SFrançois Tigeot struct drm_dp_link_address_ack_reply { 16624edb884SFrançois Tigeot u8 guid[16]; 16724edb884SFrançois Tigeot u8 nports; 16824edb884SFrançois Tigeot struct drm_dp_link_addr_reply_port { 16924edb884SFrançois Tigeot bool input_port; 17024edb884SFrançois Tigeot u8 peer_device_type; 17124edb884SFrançois Tigeot u8 port_number; 17224edb884SFrançois Tigeot bool mcs; 17324edb884SFrançois Tigeot bool ddps; 17424edb884SFrançois Tigeot bool legacy_device_plug_status; 17524edb884SFrançois Tigeot u8 dpcd_revision; 17624edb884SFrançois Tigeot u8 peer_guid[16]; 17724edb884SFrançois Tigeot u8 num_sdp_streams; 17824edb884SFrançois Tigeot u8 num_sdp_stream_sinks; 17924edb884SFrançois Tigeot } ports[16]; 18024edb884SFrançois Tigeot }; 18124edb884SFrançois Tigeot 18224edb884SFrançois Tigeot struct drm_dp_remote_dpcd_read_ack_reply { 18324edb884SFrançois Tigeot u8 port_number; 18424edb884SFrançois Tigeot u8 num_bytes; 18524edb884SFrançois Tigeot u8 bytes[255]; 18624edb884SFrançois Tigeot }; 18724edb884SFrançois Tigeot 18824edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write_ack_reply { 18924edb884SFrançois Tigeot u8 port_number; 19024edb884SFrançois Tigeot }; 19124edb884SFrançois Tigeot 19224edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write_nak_reply { 19324edb884SFrançois Tigeot u8 port_number; 19424edb884SFrançois Tigeot u8 reason; 19524edb884SFrançois Tigeot u8 bytes_written_before_failure; 19624edb884SFrançois Tigeot }; 19724edb884SFrançois Tigeot 19824edb884SFrançois Tigeot struct drm_dp_remote_i2c_read_ack_reply { 19924edb884SFrançois Tigeot u8 port_number; 20024edb884SFrançois Tigeot u8 num_bytes; 20124edb884SFrançois Tigeot u8 bytes[255]; 20224edb884SFrançois Tigeot }; 20324edb884SFrançois Tigeot 20424edb884SFrançois Tigeot struct drm_dp_remote_i2c_read_nak_reply { 20524edb884SFrançois Tigeot u8 port_number; 20624edb884SFrançois Tigeot u8 nak_reason; 20724edb884SFrançois Tigeot u8 i2c_nak_transaction; 20824edb884SFrançois Tigeot }; 20924edb884SFrançois Tigeot 21024edb884SFrançois Tigeot struct drm_dp_remote_i2c_write_ack_reply { 21124edb884SFrançois Tigeot u8 port_number; 21224edb884SFrançois Tigeot }; 21324edb884SFrançois Tigeot 21424edb884SFrançois Tigeot 21524edb884SFrançois Tigeot struct drm_dp_sideband_msg_rx { 21624edb884SFrançois Tigeot u8 chunk[48]; 21724edb884SFrançois Tigeot u8 msg[256]; 21824edb884SFrançois Tigeot u8 curchunk_len; 21924edb884SFrançois Tigeot u8 curchunk_idx; /* chunk we are parsing now */ 22024edb884SFrançois Tigeot u8 curchunk_hdrlen; 22124edb884SFrançois Tigeot u8 curlen; /* total length of the msg */ 22224edb884SFrançois Tigeot bool have_somt; 22324edb884SFrançois Tigeot bool have_eomt; 22424edb884SFrançois Tigeot struct drm_dp_sideband_msg_hdr initial_hdr; 22524edb884SFrançois Tigeot }; 22624edb884SFrançois Tigeot 227aee94f86SFrançois Tigeot #define DRM_DP_MAX_SDP_STREAMS 16 22824edb884SFrançois Tigeot struct drm_dp_allocate_payload { 22924edb884SFrançois Tigeot u8 port_number; 23024edb884SFrançois Tigeot u8 number_sdp_streams; 23124edb884SFrançois Tigeot u8 vcpi; 23224edb884SFrançois Tigeot u16 pbn; 233aee94f86SFrançois Tigeot u8 sdp_stream_sink[DRM_DP_MAX_SDP_STREAMS]; 23424edb884SFrançois Tigeot }; 23524edb884SFrançois Tigeot 23624edb884SFrançois Tigeot struct drm_dp_allocate_payload_ack_reply { 23724edb884SFrançois Tigeot u8 port_number; 23824edb884SFrançois Tigeot u8 vcpi; 23924edb884SFrançois Tigeot u16 allocated_pbn; 24024edb884SFrançois Tigeot }; 24124edb884SFrançois Tigeot 24224edb884SFrançois Tigeot struct drm_dp_connection_status_notify { 24324edb884SFrançois Tigeot u8 guid[16]; 24424edb884SFrançois Tigeot u8 port_number; 24524edb884SFrançois Tigeot bool legacy_device_plug_status; 24624edb884SFrançois Tigeot bool displayport_device_plug_status; 24724edb884SFrançois Tigeot bool message_capability_status; 24824edb884SFrançois Tigeot bool input_port; 24924edb884SFrançois Tigeot u8 peer_device_type; 25024edb884SFrançois Tigeot }; 25124edb884SFrançois Tigeot 25224edb884SFrançois Tigeot struct drm_dp_remote_dpcd_read { 25324edb884SFrançois Tigeot u8 port_number; 25424edb884SFrançois Tigeot u32 dpcd_address; 25524edb884SFrançois Tigeot u8 num_bytes; 25624edb884SFrançois Tigeot }; 25724edb884SFrançois Tigeot 25824edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write { 25924edb884SFrançois Tigeot u8 port_number; 26024edb884SFrançois Tigeot u32 dpcd_address; 26124edb884SFrançois Tigeot u8 num_bytes; 26224edb884SFrançois Tigeot u8 *bytes; 26324edb884SFrançois Tigeot }; 26424edb884SFrançois Tigeot 2650e1ba51bSFrançois Tigeot #define DP_REMOTE_I2C_READ_MAX_TRANSACTIONS 4 26624edb884SFrançois Tigeot struct drm_dp_remote_i2c_read { 26724edb884SFrançois Tigeot u8 num_transactions; 26824edb884SFrançois Tigeot u8 port_number; 26924edb884SFrançois Tigeot struct { 27024edb884SFrançois Tigeot u8 i2c_dev_id; 27124edb884SFrançois Tigeot u8 num_bytes; 27224edb884SFrançois Tigeot u8 *bytes; 27324edb884SFrançois Tigeot u8 no_stop_bit; 27424edb884SFrançois Tigeot u8 i2c_transaction_delay; 2750e1ba51bSFrançois Tigeot } transactions[DP_REMOTE_I2C_READ_MAX_TRANSACTIONS]; 27624edb884SFrançois Tigeot u8 read_i2c_device_id; 27724edb884SFrançois Tigeot u8 num_bytes_read; 27824edb884SFrançois Tigeot }; 27924edb884SFrançois Tigeot 28024edb884SFrançois Tigeot struct drm_dp_remote_i2c_write { 28124edb884SFrançois Tigeot u8 port_number; 28224edb884SFrançois Tigeot u8 write_i2c_device_id; 28324edb884SFrançois Tigeot u8 num_bytes; 28424edb884SFrançois Tigeot u8 *bytes; 28524edb884SFrançois Tigeot }; 28624edb884SFrançois Tigeot 28724edb884SFrançois Tigeot /* this covers ENUM_RESOURCES, POWER_DOWN_PHY, POWER_UP_PHY */ 28824edb884SFrançois Tigeot struct drm_dp_port_number_req { 28924edb884SFrançois Tigeot u8 port_number; 29024edb884SFrançois Tigeot }; 29124edb884SFrançois Tigeot 29224edb884SFrançois Tigeot struct drm_dp_enum_path_resources_ack_reply { 29324edb884SFrançois Tigeot u8 port_number; 29424edb884SFrançois Tigeot u16 full_payload_bw_number; 29524edb884SFrançois Tigeot u16 avail_payload_bw_number; 29624edb884SFrançois Tigeot }; 29724edb884SFrançois Tigeot 29824edb884SFrançois Tigeot /* covers POWER_DOWN_PHY, POWER_UP_PHY */ 29924edb884SFrançois Tigeot struct drm_dp_port_number_rep { 30024edb884SFrançois Tigeot u8 port_number; 30124edb884SFrançois Tigeot }; 30224edb884SFrançois Tigeot 30324edb884SFrançois Tigeot struct drm_dp_query_payload { 30424edb884SFrançois Tigeot u8 port_number; 30524edb884SFrançois Tigeot u8 vcpi; 30624edb884SFrançois Tigeot }; 30724edb884SFrançois Tigeot 30824edb884SFrançois Tigeot struct drm_dp_resource_status_notify { 30924edb884SFrançois Tigeot u8 port_number; 31024edb884SFrançois Tigeot u8 guid[16]; 31124edb884SFrançois Tigeot u16 available_pbn; 31224edb884SFrançois Tigeot }; 31324edb884SFrançois Tigeot 31424edb884SFrançois Tigeot struct drm_dp_query_payload_ack_reply { 31524edb884SFrançois Tigeot u8 port_number; 31624edb884SFrançois Tigeot u8 allocated_pbn; 31724edb884SFrançois Tigeot }; 31824edb884SFrançois Tigeot 31924edb884SFrançois Tigeot struct drm_dp_sideband_msg_req_body { 32024edb884SFrançois Tigeot u8 req_type; 32124edb884SFrançois Tigeot union ack_req { 32224edb884SFrançois Tigeot struct drm_dp_connection_status_notify conn_stat; 32324edb884SFrançois Tigeot struct drm_dp_port_number_req port_num; 32424edb884SFrançois Tigeot struct drm_dp_resource_status_notify resource_stat; 32524edb884SFrançois Tigeot 32624edb884SFrançois Tigeot struct drm_dp_query_payload query_payload; 32724edb884SFrançois Tigeot struct drm_dp_allocate_payload allocate_payload; 32824edb884SFrançois Tigeot 32924edb884SFrançois Tigeot struct drm_dp_remote_dpcd_read dpcd_read; 33024edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write dpcd_write; 33124edb884SFrançois Tigeot 33224edb884SFrançois Tigeot struct drm_dp_remote_i2c_read i2c_read; 33324edb884SFrançois Tigeot struct drm_dp_remote_i2c_write i2c_write; 33424edb884SFrançois Tigeot } u; 33524edb884SFrançois Tigeot }; 33624edb884SFrançois Tigeot 33724edb884SFrançois Tigeot struct drm_dp_sideband_msg_reply_body { 33824edb884SFrançois Tigeot u8 reply_type; 33924edb884SFrançois Tigeot u8 req_type; 34024edb884SFrançois Tigeot union ack_replies { 34124edb884SFrançois Tigeot struct drm_dp_nak_reply nak; 34224edb884SFrançois Tigeot struct drm_dp_link_address_ack_reply link_addr; 34324edb884SFrançois Tigeot struct drm_dp_port_number_rep port_number; 34424edb884SFrançois Tigeot 34524edb884SFrançois Tigeot struct drm_dp_enum_path_resources_ack_reply path_resources; 34624edb884SFrançois Tigeot struct drm_dp_allocate_payload_ack_reply allocate_payload; 34724edb884SFrançois Tigeot struct drm_dp_query_payload_ack_reply query_payload; 34824edb884SFrançois Tigeot 34924edb884SFrançois Tigeot struct drm_dp_remote_dpcd_read_ack_reply remote_dpcd_read_ack; 35024edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write_ack_reply remote_dpcd_write_ack; 35124edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write_nak_reply remote_dpcd_write_nack; 35224edb884SFrançois Tigeot 35324edb884SFrançois Tigeot struct drm_dp_remote_i2c_read_ack_reply remote_i2c_read_ack; 35424edb884SFrançois Tigeot struct drm_dp_remote_i2c_read_nak_reply remote_i2c_read_nack; 35524edb884SFrançois Tigeot struct drm_dp_remote_i2c_write_ack_reply remote_i2c_write_ack; 35624edb884SFrançois Tigeot } u; 35724edb884SFrançois Tigeot }; 35824edb884SFrançois Tigeot 35924edb884SFrançois Tigeot /* msg is queued to be put into a slot */ 36024edb884SFrançois Tigeot #define DRM_DP_SIDEBAND_TX_QUEUED 0 36124edb884SFrançois Tigeot /* msg has started transmitting on a slot - still on msgq */ 36224edb884SFrançois Tigeot #define DRM_DP_SIDEBAND_TX_START_SEND 1 36324edb884SFrançois Tigeot /* msg has finished transmitting on a slot - removed from msgq only in slot */ 36424edb884SFrançois Tigeot #define DRM_DP_SIDEBAND_TX_SENT 2 36524edb884SFrançois Tigeot /* msg has received a response - removed from slot */ 36624edb884SFrançois Tigeot #define DRM_DP_SIDEBAND_TX_RX 3 36724edb884SFrançois Tigeot #define DRM_DP_SIDEBAND_TX_TIMEOUT 4 36824edb884SFrançois Tigeot 36924edb884SFrançois Tigeot struct drm_dp_sideband_msg_tx { 37024edb884SFrançois Tigeot u8 msg[256]; 37124edb884SFrançois Tigeot u8 chunk[48]; 37224edb884SFrançois Tigeot u8 cur_offset; 37324edb884SFrançois Tigeot u8 cur_len; 37424edb884SFrançois Tigeot struct drm_dp_mst_branch *dst; 37524edb884SFrançois Tigeot struct list_head next; 37624edb884SFrançois Tigeot int seqno; 37724edb884SFrançois Tigeot int state; 37824edb884SFrançois Tigeot bool path_msg; 37924edb884SFrançois Tigeot struct drm_dp_sideband_msg_reply_body reply; 38024edb884SFrançois Tigeot }; 38124edb884SFrançois Tigeot 38224edb884SFrançois Tigeot /* sideband msg handler */ 38324edb884SFrançois Tigeot struct drm_dp_mst_topology_mgr; 38424edb884SFrançois Tigeot struct drm_dp_mst_topology_cbs { 38524edb884SFrançois Tigeot /* create a connector for a port */ 3862c9916cdSFrançois Tigeot struct drm_connector *(*add_connector)(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *path); 3870e1ba51bSFrançois Tigeot void (*register_connector)(struct drm_connector *connector); 38824edb884SFrançois Tigeot void (*destroy_connector)(struct drm_dp_mst_topology_mgr *mgr, 38924edb884SFrançois Tigeot struct drm_connector *connector); 39024edb884SFrançois Tigeot void (*hotplug)(struct drm_dp_mst_topology_mgr *mgr); 39124edb884SFrançois Tigeot 39224edb884SFrançois Tigeot }; 39324edb884SFrançois Tigeot 39424edb884SFrançois Tigeot #define DP_MAX_PAYLOAD (sizeof(unsigned long) * 8) 39524edb884SFrançois Tigeot 39624edb884SFrançois Tigeot #define DP_PAYLOAD_LOCAL 1 39724edb884SFrançois Tigeot #define DP_PAYLOAD_REMOTE 2 39824edb884SFrançois Tigeot #define DP_PAYLOAD_DELETE_LOCAL 3 39924edb884SFrançois Tigeot 40024edb884SFrançois Tigeot struct drm_dp_payload { 40124edb884SFrançois Tigeot int payload_state; 40224edb884SFrançois Tigeot int start_slot; 40324edb884SFrançois Tigeot int num_slots; 4042c9916cdSFrançois Tigeot int vcpi; 40524edb884SFrançois Tigeot }; 40624edb884SFrançois Tigeot 407*3f2dd94aSFrançois Tigeot #define to_dp_mst_topology_state(x) container_of(x, struct drm_dp_mst_topology_state, base) 408*3f2dd94aSFrançois Tigeot 409*3f2dd94aSFrançois Tigeot struct drm_dp_mst_topology_state { 410*3f2dd94aSFrançois Tigeot struct drm_private_state base; 411*3f2dd94aSFrançois Tigeot int avail_slots; 412*3f2dd94aSFrançois Tigeot struct drm_atomic_state *state; 413*3f2dd94aSFrançois Tigeot struct drm_dp_mst_topology_mgr *mgr; 414*3f2dd94aSFrançois Tigeot }; 415*3f2dd94aSFrançois Tigeot 416*3f2dd94aSFrançois Tigeot #define to_dp_mst_topology_mgr(x) container_of(x, struct drm_dp_mst_topology_mgr, base) 417*3f2dd94aSFrançois Tigeot 41824edb884SFrançois Tigeot /** 41924edb884SFrançois Tigeot * struct drm_dp_mst_topology_mgr - DisplayPort MST manager 42024edb884SFrançois Tigeot * 42124edb884SFrançois Tigeot * This struct represents the toplevel displayport MST topology manager. 42224edb884SFrançois Tigeot * There should be one instance of this for every MST capable DP connector 42324edb884SFrançois Tigeot * on the GPU. 42424edb884SFrançois Tigeot */ 42524edb884SFrançois Tigeot struct drm_dp_mst_topology_mgr { 4261dedbd3bSFrançois Tigeot /** 427*3f2dd94aSFrançois Tigeot * @base: Base private object for atomic 428*3f2dd94aSFrançois Tigeot */ 429*3f2dd94aSFrançois Tigeot struct drm_private_obj base; 430*3f2dd94aSFrançois Tigeot 431*3f2dd94aSFrançois Tigeot /** 4321dedbd3bSFrançois Tigeot * @dev: device pointer for adding i2c devices etc. 4331dedbd3bSFrançois Tigeot */ 434a85cb24fSFrançois Tigeot struct drm_device *dev; 4351dedbd3bSFrançois Tigeot /** 4361dedbd3bSFrançois Tigeot * @cbs: callbacks for connector addition and destruction. 4371dedbd3bSFrançois Tigeot */ 438aee94f86SFrançois Tigeot const struct drm_dp_mst_topology_cbs *cbs; 4391dedbd3bSFrançois Tigeot /** 4401dedbd3bSFrançois Tigeot * @max_dpcd_transaction_bytes: maximum number of bytes to read/write 4411dedbd3bSFrançois Tigeot * in one go. 4421dedbd3bSFrançois Tigeot */ 44324edb884SFrançois Tigeot int max_dpcd_transaction_bytes; 4441dedbd3bSFrançois Tigeot /** 4451dedbd3bSFrançois Tigeot * @aux: AUX channel for the DP MST connector this topolgy mgr is 4461dedbd3bSFrançois Tigeot * controlling. 4471dedbd3bSFrançois Tigeot */ 4481dedbd3bSFrançois Tigeot struct drm_dp_aux *aux; 4491dedbd3bSFrançois Tigeot /** 4501dedbd3bSFrançois Tigeot * @max_payloads: maximum number of payloads the GPU can generate. 4511dedbd3bSFrançois Tigeot */ 45224edb884SFrançois Tigeot int max_payloads; 4531dedbd3bSFrançois Tigeot /** 4541dedbd3bSFrançois Tigeot * @conn_base_id: DRM connector ID this mgr is connected to. Only used 4551dedbd3bSFrançois Tigeot * to build the MST connector path value. 4561dedbd3bSFrançois Tigeot */ 45724edb884SFrançois Tigeot int conn_base_id; 45824edb884SFrançois Tigeot 4591dedbd3bSFrançois Tigeot /** 4601dedbd3bSFrançois Tigeot * @down_rep_recv: Message receiver state for down replies. This and 4611dedbd3bSFrançois Tigeot * @up_req_recv are only ever access from the work item, which is 4621dedbd3bSFrançois Tigeot * serialised. 4631dedbd3bSFrançois Tigeot */ 46424edb884SFrançois Tigeot struct drm_dp_sideband_msg_rx down_rep_recv; 4651dedbd3bSFrançois Tigeot /** 4661dedbd3bSFrançois Tigeot * @up_req_recv: Message receiver state for up requests. This and 4671dedbd3bSFrançois Tigeot * @down_rep_recv are only ever access from the work item, which is 4681dedbd3bSFrançois Tigeot * serialised. 4691dedbd3bSFrançois Tigeot */ 47024edb884SFrançois Tigeot struct drm_dp_sideband_msg_rx up_req_recv; 47124edb884SFrançois Tigeot 4721dedbd3bSFrançois Tigeot /** 4731dedbd3bSFrançois Tigeot * @lock: protects mst state, primary, dpcd. 4741dedbd3bSFrançois Tigeot */ 4751dedbd3bSFrançois Tigeot struct lock lock; 47624edb884SFrançois Tigeot 4771dedbd3bSFrançois Tigeot /** 4781dedbd3bSFrançois Tigeot * @mst_state: If this manager is enabled for an MST capable port. False 4791dedbd3bSFrançois Tigeot * if no MST sink/branch devices is connected. 4801dedbd3bSFrançois Tigeot */ 48124edb884SFrançois Tigeot bool mst_state; 4821dedbd3bSFrançois Tigeot /** 4831dedbd3bSFrançois Tigeot * @mst_primary: Pointer to the primary/first branch device. 4841dedbd3bSFrançois Tigeot */ 48524edb884SFrançois Tigeot struct drm_dp_mst_branch *mst_primary; 486aee94f86SFrançois Tigeot 4871dedbd3bSFrançois Tigeot /** 4881dedbd3bSFrançois Tigeot * @dpcd: Cache of DPCD for primary port. 4891dedbd3bSFrançois Tigeot */ 49024edb884SFrançois Tigeot u8 dpcd[DP_RECEIVER_CAP_SIZE]; 4911dedbd3bSFrançois Tigeot /** 4921dedbd3bSFrançois Tigeot * @sink_count: Sink count from DEVICE_SERVICE_IRQ_VECTOR_ESI0. 4931dedbd3bSFrançois Tigeot */ 49424edb884SFrançois Tigeot u8 sink_count; 4951dedbd3bSFrançois Tigeot /** 4961dedbd3bSFrançois Tigeot * @pbn_div: PBN to slots divisor. 4971dedbd3bSFrançois Tigeot */ 49824edb884SFrançois Tigeot int pbn_div; 49924edb884SFrançois Tigeot 5001dedbd3bSFrançois Tigeot /** 501*3f2dd94aSFrançois Tigeot * @state: State information for topology manager 502*3f2dd94aSFrançois Tigeot */ 503*3f2dd94aSFrançois Tigeot struct drm_dp_mst_topology_state *state; 504*3f2dd94aSFrançois Tigeot 505*3f2dd94aSFrançois Tigeot /** 506*3f2dd94aSFrançois Tigeot * @funcs: Atomic helper callbacks 507*3f2dd94aSFrançois Tigeot */ 508*3f2dd94aSFrançois Tigeot const struct drm_private_state_funcs *funcs; 509*3f2dd94aSFrançois Tigeot 510*3f2dd94aSFrançois Tigeot /** 511a85cb24fSFrançois Tigeot * @qlock: protects @tx_msg_downq, the &drm_dp_mst_branch.txslost and 512a85cb24fSFrançois Tigeot * &drm_dp_sideband_msg_tx.state once they are queued 5131dedbd3bSFrançois Tigeot */ 51424edb884SFrançois Tigeot struct lock qlock; 5151dedbd3bSFrançois Tigeot /** 5161dedbd3bSFrançois Tigeot * @tx_msg_downq: List of pending down replies. 5171dedbd3bSFrançois Tigeot */ 51824edb884SFrançois Tigeot struct list_head tx_msg_downq; 51924edb884SFrançois Tigeot 5201dedbd3bSFrançois Tigeot /** 5211dedbd3bSFrançois Tigeot * @payload_lock: Protect payload information. 5221dedbd3bSFrançois Tigeot */ 52324edb884SFrançois Tigeot struct lock payload_lock; 5241dedbd3bSFrançois Tigeot /** 5251dedbd3bSFrançois Tigeot * @proposed_vcpis: Array of pointers for the new VCPI allocation. The 526a85cb24fSFrançois Tigeot * VCPI structure itself is &drm_dp_mst_port.vcpi. 5271dedbd3bSFrançois Tigeot */ 52824edb884SFrançois Tigeot struct drm_dp_vcpi **proposed_vcpis; 5291dedbd3bSFrançois Tigeot /** 5301dedbd3bSFrançois Tigeot * @payloads: Array of payloads. 5311dedbd3bSFrançois Tigeot */ 53224edb884SFrançois Tigeot struct drm_dp_payload *payloads; 5331dedbd3bSFrançois Tigeot /** 5341dedbd3bSFrançois Tigeot * @payload_mask: Elements of @payloads actually in use. Since 5351dedbd3bSFrançois Tigeot * reallocation of active outputs isn't possible gaps can be created by 5361dedbd3bSFrançois Tigeot * disabling outputs out of order compared to how they've been enabled. 5371dedbd3bSFrançois Tigeot */ 53824edb884SFrançois Tigeot unsigned long payload_mask; 5391dedbd3bSFrançois Tigeot /** 5401dedbd3bSFrançois Tigeot * @vcpi_mask: Similar to @payload_mask, but for @proposed_vcpis. 5411dedbd3bSFrançois Tigeot */ 5422c9916cdSFrançois Tigeot unsigned long vcpi_mask; 54324edb884SFrançois Tigeot 5441dedbd3bSFrançois Tigeot /** 5451dedbd3bSFrançois Tigeot * @tx_waitq: Wait to queue stall for the tx worker. 5461dedbd3bSFrançois Tigeot */ 54724edb884SFrançois Tigeot wait_queue_head_t tx_waitq; 5481dedbd3bSFrançois Tigeot /** 5491dedbd3bSFrançois Tigeot * @work: Probe work. 5501dedbd3bSFrançois Tigeot */ 55124edb884SFrançois Tigeot struct work_struct work; 5521dedbd3bSFrançois Tigeot /** 5531dedbd3bSFrançois Tigeot * @tx_work: Sideband transmit worker. This can nest within the main 5541dedbd3bSFrançois Tigeot * @work worker for each transaction @work launches. 5551dedbd3bSFrançois Tigeot */ 55624edb884SFrançois Tigeot struct work_struct tx_work; 5570e1ba51bSFrançois Tigeot 5581dedbd3bSFrançois Tigeot /** 5591dedbd3bSFrançois Tigeot * @destroy_connector_list: List of to be destroyed connectors. 5601dedbd3bSFrançois Tigeot */ 5610e1ba51bSFrançois Tigeot struct list_head destroy_connector_list; 5621dedbd3bSFrançois Tigeot /** 5631dedbd3bSFrançois Tigeot * @destroy_connector_lock: Protects @connector_list. 5641dedbd3bSFrançois Tigeot */ 5650e1ba51bSFrançois Tigeot struct lock destroy_connector_lock; 5661dedbd3bSFrançois Tigeot /** 5671dedbd3bSFrançois Tigeot * @destroy_connector_work: Work item to destroy connectors. Needed to 5681dedbd3bSFrançois Tigeot * avoid locking inversion. 5691dedbd3bSFrançois Tigeot */ 5700e1ba51bSFrançois Tigeot struct work_struct destroy_connector_work; 57124edb884SFrançois Tigeot }; 57224edb884SFrançois Tigeot 573a85cb24fSFrançois Tigeot int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr, 574a85cb24fSFrançois Tigeot struct drm_device *dev, struct drm_dp_aux *aux, 575a85cb24fSFrançois Tigeot int max_dpcd_transaction_bytes, 576a85cb24fSFrançois Tigeot int max_payloads, int conn_base_id); 57724edb884SFrançois Tigeot 57824edb884SFrançois Tigeot void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr); 57924edb884SFrançois Tigeot 58024edb884SFrançois Tigeot 58124edb884SFrançois Tigeot int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state); 58224edb884SFrançois Tigeot 58324edb884SFrançois Tigeot 58424edb884SFrançois Tigeot int drm_dp_mst_hpd_irq(struct drm_dp_mst_topology_mgr *mgr, u8 *esi, bool *handled); 58524edb884SFrançois Tigeot 58624edb884SFrançois Tigeot 5872c9916cdSFrançois Tigeot 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); 58824edb884SFrançois Tigeot 589aee94f86SFrançois Tigeot bool drm_dp_mst_port_has_audio(struct drm_dp_mst_topology_mgr *mgr, 590aee94f86SFrançois Tigeot struct drm_dp_mst_port *port); 59124edb884SFrançois Tigeot struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); 59224edb884SFrançois Tigeot 59324edb884SFrançois Tigeot 59424edb884SFrançois Tigeot int drm_dp_calc_pbn_mode(int clock, int bpp); 59524edb884SFrançois Tigeot 59624edb884SFrançois Tigeot 597a85cb24fSFrançois Tigeot bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, 598a85cb24fSFrançois Tigeot struct drm_dp_mst_port *port, int pbn, int slots); 59924edb884SFrançois Tigeot 600477eb7f9SFrançois Tigeot int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); 601477eb7f9SFrançois Tigeot 60224edb884SFrançois Tigeot 60324edb884SFrançois Tigeot void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); 60424edb884SFrançois Tigeot 60524edb884SFrançois Tigeot 60624edb884SFrançois Tigeot void drm_dp_mst_deallocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, 60724edb884SFrançois Tigeot struct drm_dp_mst_port *port); 60824edb884SFrançois Tigeot 60924edb884SFrançois Tigeot 61024edb884SFrançois Tigeot int drm_dp_find_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, 61124edb884SFrançois Tigeot int pbn); 61224edb884SFrançois Tigeot 61324edb884SFrançois Tigeot 61424edb884SFrançois Tigeot int drm_dp_update_payload_part1(struct drm_dp_mst_topology_mgr *mgr); 61524edb884SFrançois Tigeot 61624edb884SFrançois Tigeot 61724edb884SFrançois Tigeot int drm_dp_update_payload_part2(struct drm_dp_mst_topology_mgr *mgr); 61824edb884SFrançois Tigeot 61924edb884SFrançois Tigeot int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr); 62024edb884SFrançois Tigeot 62124edb884SFrançois Tigeot void drm_dp_mst_dump_topology(struct seq_file *m, 62224edb884SFrançois Tigeot struct drm_dp_mst_topology_mgr *mgr); 62324edb884SFrançois Tigeot 62424edb884SFrançois Tigeot void drm_dp_mst_topology_mgr_suspend(struct drm_dp_mst_topology_mgr *mgr); 62524edb884SFrançois Tigeot int drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr); 626*3f2dd94aSFrançois Tigeot struct drm_dp_mst_topology_state *drm_atomic_get_mst_topology_state(struct drm_atomic_state *state, 627*3f2dd94aSFrançois Tigeot struct drm_dp_mst_topology_mgr *mgr); 628*3f2dd94aSFrançois Tigeot int drm_dp_atomic_find_vcpi_slots(struct drm_atomic_state *state, 629*3f2dd94aSFrançois Tigeot struct drm_dp_mst_topology_mgr *mgr, 630*3f2dd94aSFrançois Tigeot struct drm_dp_mst_port *port, int pbn); 631*3f2dd94aSFrançois Tigeot int drm_dp_atomic_release_vcpi_slots(struct drm_atomic_state *state, 632*3f2dd94aSFrançois Tigeot struct drm_dp_mst_topology_mgr *mgr, 633*3f2dd94aSFrançois Tigeot int slots); 634*3f2dd94aSFrançois Tigeot int drm_dp_send_power_updown_phy(struct drm_dp_mst_topology_mgr *mgr, 635*3f2dd94aSFrançois Tigeot struct drm_dp_mst_port *port, bool power_up); 636*3f2dd94aSFrançois Tigeot 63724edb884SFrançois Tigeot #endif 638