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> 2724edb884SFrançois Tigeot 2824edb884SFrançois Tigeot struct drm_dp_mst_branch; 2924edb884SFrançois Tigeot 3024edb884SFrançois Tigeot /** 312c9916cdSFrançois Tigeot * struct drm_dp_vcpi - Virtual Channel Payload Identifier 3224edb884SFrançois Tigeot * @vcpi: Virtual channel ID. 3324edb884SFrançois Tigeot * @pbn: Payload Bandwidth Number for this channel 3424edb884SFrançois Tigeot * @aligned_pbn: PBN aligned with slot size 3524edb884SFrançois Tigeot * @num_slots: number of slots for this PBN 3624edb884SFrançois Tigeot */ 3724edb884SFrançois Tigeot struct drm_dp_vcpi { 3824edb884SFrançois Tigeot int vcpi; 3924edb884SFrançois Tigeot int pbn; 4024edb884SFrançois Tigeot int aligned_pbn; 4124edb884SFrançois Tigeot int num_slots; 4224edb884SFrançois Tigeot }; 4324edb884SFrançois Tigeot 4424edb884SFrançois Tigeot /** 4524edb884SFrançois Tigeot * struct drm_dp_mst_port - MST port 4624edb884SFrançois Tigeot * @kref: reference count for this port. 4724edb884SFrançois Tigeot * @guid_valid: for DP 1.2 devices if we have validated the GUID. 4824edb884SFrançois Tigeot * @guid: guid for DP 1.2 device on this port. 4924edb884SFrançois Tigeot * @port_num: port number 5024edb884SFrançois Tigeot * @input: if this port is an input port. 5124edb884SFrançois Tigeot * @mcs: message capability status - DP 1.2 spec. 5224edb884SFrançois Tigeot * @ddps: DisplayPort Device Plug Status - DP 1.2 5324edb884SFrançois Tigeot * @pdt: Peer Device Type 5424edb884SFrançois Tigeot * @ldps: Legacy Device Plug Status 5524edb884SFrançois Tigeot * @dpcd_rev: DPCD revision of device on this port 5624edb884SFrançois Tigeot * @num_sdp_streams: Number of simultaneous streams 5724edb884SFrançois Tigeot * @num_sdp_stream_sinks: Number of stream sinks 5824edb884SFrançois Tigeot * @available_pbn: Available bandwidth for this port. 5924edb884SFrançois Tigeot * @next: link to next port on this branch device 6024edb884SFrançois Tigeot * @mstb: branch device attach below this port 6124edb884SFrançois Tigeot * @aux: i2c aux transport to talk to device connected to this port. 6224edb884SFrançois Tigeot * @parent: branch device parent of this port 6324edb884SFrançois Tigeot * @vcpi: Virtual Channel Payload info for this port. 6424edb884SFrançois Tigeot * @connector: DRM connector this port is connected to. 6524edb884SFrançois Tigeot * @mgr: topology manager this port lives under. 6624edb884SFrançois Tigeot * 6724edb884SFrançois Tigeot * This structure represents an MST port endpoint on a device somewhere 6824edb884SFrançois Tigeot * in the MST topology. 6924edb884SFrançois Tigeot */ 7024edb884SFrançois Tigeot struct drm_dp_mst_port { 7124edb884SFrançois Tigeot struct kref kref; 7224edb884SFrançois Tigeot 7324edb884SFrançois Tigeot /* if dpcd 1.2 device is on this port - its GUID info */ 7424edb884SFrançois Tigeot bool guid_valid; 7524edb884SFrançois Tigeot u8 guid[16]; 7624edb884SFrançois Tigeot 7724edb884SFrançois Tigeot u8 port_num; 7824edb884SFrançois Tigeot bool input; 7924edb884SFrançois Tigeot bool mcs; 8024edb884SFrançois Tigeot bool ddps; 8124edb884SFrançois Tigeot u8 pdt; 8224edb884SFrançois Tigeot bool ldps; 8324edb884SFrançois Tigeot u8 dpcd_rev; 8424edb884SFrançois Tigeot u8 num_sdp_streams; 8524edb884SFrançois Tigeot u8 num_sdp_stream_sinks; 8624edb884SFrançois Tigeot uint16_t available_pbn; 8724edb884SFrançois Tigeot struct list_head next; 8824edb884SFrançois Tigeot struct drm_dp_mst_branch *mstb; /* pointer to an mstb if this port has one */ 8924edb884SFrançois Tigeot struct drm_dp_aux aux; /* i2c bus for this port? */ 9024edb884SFrançois Tigeot struct drm_dp_mst_branch *parent; 9124edb884SFrançois Tigeot 9224edb884SFrançois Tigeot struct drm_dp_vcpi vcpi; 9324edb884SFrançois Tigeot struct drm_connector *connector; 9424edb884SFrançois Tigeot struct drm_dp_mst_topology_mgr *mgr; 952c9916cdSFrançois Tigeot 962c9916cdSFrançois Tigeot struct edid *cached_edid; /* for DP logical ports - make tiling work */ 9724edb884SFrançois Tigeot }; 9824edb884SFrançois Tigeot 9924edb884SFrançois Tigeot /** 10024edb884SFrançois Tigeot * struct drm_dp_mst_branch - MST branch device. 10124edb884SFrançois Tigeot * @kref: reference count for this port. 10224edb884SFrançois Tigeot * @rad: Relative Address to talk to this branch device. 10324edb884SFrançois Tigeot * @lct: Link count total to talk to this branch device. 10424edb884SFrançois Tigeot * @num_ports: number of ports on the branch. 10524edb884SFrançois Tigeot * @msg_slots: one bit per transmitted msg slot. 10624edb884SFrançois Tigeot * @ports: linked list of ports on this branch. 10724edb884SFrançois Tigeot * @port_parent: pointer to the port parent, NULL if toplevel. 10824edb884SFrançois Tigeot * @mgr: topology manager for this branch device. 10924edb884SFrançois Tigeot * @tx_slots: transmission slots for this device. 11024edb884SFrançois Tigeot * @last_seqno: last sequence number used to talk to this. 11124edb884SFrançois Tigeot * @link_address_sent: if a link address message has been sent to this device yet. 11224edb884SFrançois Tigeot * 11324edb884SFrançois Tigeot * This structure represents an MST branch device, there is one 11424edb884SFrançois Tigeot * primary branch device at the root, along with any others connected 11524edb884SFrançois Tigeot * to downstream ports 11624edb884SFrançois Tigeot */ 11724edb884SFrançois Tigeot struct drm_dp_mst_branch { 11824edb884SFrançois Tigeot struct kref kref; 11924edb884SFrançois Tigeot u8 rad[8]; 12024edb884SFrançois Tigeot u8 lct; 12124edb884SFrançois Tigeot int num_ports; 12224edb884SFrançois Tigeot 12324edb884SFrançois Tigeot int msg_slots; 12424edb884SFrançois Tigeot struct list_head ports; 12524edb884SFrançois Tigeot 12624edb884SFrançois Tigeot /* list of tx ops queue for this port */ 12724edb884SFrançois Tigeot struct drm_dp_mst_port *port_parent; 12824edb884SFrançois Tigeot struct drm_dp_mst_topology_mgr *mgr; 12924edb884SFrançois Tigeot 13024edb884SFrançois Tigeot /* slots are protected by mstb->mgr->qlock */ 13124edb884SFrançois Tigeot struct drm_dp_sideband_msg_tx *tx_slots[2]; 13224edb884SFrançois Tigeot int last_seqno; 13324edb884SFrançois Tigeot bool link_address_sent; 13424edb884SFrançois Tigeot }; 13524edb884SFrançois Tigeot 13624edb884SFrançois Tigeot 13724edb884SFrançois Tigeot /* sideband msg header - not bit struct */ 13824edb884SFrançois Tigeot struct drm_dp_sideband_msg_hdr { 13924edb884SFrançois Tigeot u8 lct; 14024edb884SFrançois Tigeot u8 lcr; 14124edb884SFrançois Tigeot u8 rad[8]; 14224edb884SFrançois Tigeot bool broadcast; 14324edb884SFrançois Tigeot bool path_msg; 14424edb884SFrançois Tigeot u8 msg_len; 14524edb884SFrançois Tigeot bool somt; 14624edb884SFrançois Tigeot bool eomt; 14724edb884SFrançois Tigeot bool seqno; 14824edb884SFrançois Tigeot }; 14924edb884SFrançois Tigeot 15024edb884SFrançois Tigeot struct drm_dp_nak_reply { 15124edb884SFrançois Tigeot u8 guid[16]; 15224edb884SFrançois Tigeot u8 reason; 15324edb884SFrançois Tigeot u8 nak_data; 15424edb884SFrançois Tigeot }; 15524edb884SFrançois Tigeot 15624edb884SFrançois Tigeot struct drm_dp_link_address_ack_reply { 15724edb884SFrançois Tigeot u8 guid[16]; 15824edb884SFrançois Tigeot u8 nports; 15924edb884SFrançois Tigeot struct drm_dp_link_addr_reply_port { 16024edb884SFrançois Tigeot bool input_port; 16124edb884SFrançois Tigeot u8 peer_device_type; 16224edb884SFrançois Tigeot u8 port_number; 16324edb884SFrançois Tigeot bool mcs; 16424edb884SFrançois Tigeot bool ddps; 16524edb884SFrançois Tigeot bool legacy_device_plug_status; 16624edb884SFrançois Tigeot u8 dpcd_revision; 16724edb884SFrançois Tigeot u8 peer_guid[16]; 16824edb884SFrançois Tigeot u8 num_sdp_streams; 16924edb884SFrançois Tigeot u8 num_sdp_stream_sinks; 17024edb884SFrançois Tigeot } ports[16]; 17124edb884SFrançois Tigeot }; 17224edb884SFrançois Tigeot 17324edb884SFrançois Tigeot struct drm_dp_remote_dpcd_read_ack_reply { 17424edb884SFrançois Tigeot u8 port_number; 17524edb884SFrançois Tigeot u8 num_bytes; 17624edb884SFrançois Tigeot u8 bytes[255]; 17724edb884SFrançois Tigeot }; 17824edb884SFrançois Tigeot 17924edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write_ack_reply { 18024edb884SFrançois Tigeot u8 port_number; 18124edb884SFrançois Tigeot }; 18224edb884SFrançois Tigeot 18324edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write_nak_reply { 18424edb884SFrançois Tigeot u8 port_number; 18524edb884SFrançois Tigeot u8 reason; 18624edb884SFrançois Tigeot u8 bytes_written_before_failure; 18724edb884SFrançois Tigeot }; 18824edb884SFrançois Tigeot 18924edb884SFrançois Tigeot struct drm_dp_remote_i2c_read_ack_reply { 19024edb884SFrançois Tigeot u8 port_number; 19124edb884SFrançois Tigeot u8 num_bytes; 19224edb884SFrançois Tigeot u8 bytes[255]; 19324edb884SFrançois Tigeot }; 19424edb884SFrançois Tigeot 19524edb884SFrançois Tigeot struct drm_dp_remote_i2c_read_nak_reply { 19624edb884SFrançois Tigeot u8 port_number; 19724edb884SFrançois Tigeot u8 nak_reason; 19824edb884SFrançois Tigeot u8 i2c_nak_transaction; 19924edb884SFrançois Tigeot }; 20024edb884SFrançois Tigeot 20124edb884SFrançois Tigeot struct drm_dp_remote_i2c_write_ack_reply { 20224edb884SFrançois Tigeot u8 port_number; 20324edb884SFrançois Tigeot }; 20424edb884SFrançois Tigeot 20524edb884SFrançois Tigeot 20624edb884SFrançois Tigeot struct drm_dp_sideband_msg_rx { 20724edb884SFrançois Tigeot u8 chunk[48]; 20824edb884SFrançois Tigeot u8 msg[256]; 20924edb884SFrançois Tigeot u8 curchunk_len; 21024edb884SFrançois Tigeot u8 curchunk_idx; /* chunk we are parsing now */ 21124edb884SFrançois Tigeot u8 curchunk_hdrlen; 21224edb884SFrançois Tigeot u8 curlen; /* total length of the msg */ 21324edb884SFrançois Tigeot bool have_somt; 21424edb884SFrançois Tigeot bool have_eomt; 21524edb884SFrançois Tigeot struct drm_dp_sideband_msg_hdr initial_hdr; 21624edb884SFrançois Tigeot }; 21724edb884SFrançois Tigeot 21824edb884SFrançois Tigeot 21924edb884SFrançois Tigeot struct drm_dp_allocate_payload { 22024edb884SFrançois Tigeot u8 port_number; 22124edb884SFrançois Tigeot u8 number_sdp_streams; 22224edb884SFrançois Tigeot u8 vcpi; 22324edb884SFrançois Tigeot u16 pbn; 22424edb884SFrançois Tigeot u8 sdp_stream_sink[8]; 22524edb884SFrançois Tigeot }; 22624edb884SFrançois Tigeot 22724edb884SFrançois Tigeot struct drm_dp_allocate_payload_ack_reply { 22824edb884SFrançois Tigeot u8 port_number; 22924edb884SFrançois Tigeot u8 vcpi; 23024edb884SFrançois Tigeot u16 allocated_pbn; 23124edb884SFrançois Tigeot }; 23224edb884SFrançois Tigeot 23324edb884SFrançois Tigeot struct drm_dp_connection_status_notify { 23424edb884SFrançois Tigeot u8 guid[16]; 23524edb884SFrançois Tigeot u8 port_number; 23624edb884SFrançois Tigeot bool legacy_device_plug_status; 23724edb884SFrançois Tigeot bool displayport_device_plug_status; 23824edb884SFrançois Tigeot bool message_capability_status; 23924edb884SFrançois Tigeot bool input_port; 24024edb884SFrançois Tigeot u8 peer_device_type; 24124edb884SFrançois Tigeot }; 24224edb884SFrançois Tigeot 24324edb884SFrançois Tigeot struct drm_dp_remote_dpcd_read { 24424edb884SFrançois Tigeot u8 port_number; 24524edb884SFrançois Tigeot u32 dpcd_address; 24624edb884SFrançois Tigeot u8 num_bytes; 24724edb884SFrançois Tigeot }; 24824edb884SFrançois Tigeot 24924edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write { 25024edb884SFrançois Tigeot u8 port_number; 25124edb884SFrançois Tigeot u32 dpcd_address; 25224edb884SFrançois Tigeot u8 num_bytes; 25324edb884SFrançois Tigeot u8 *bytes; 25424edb884SFrançois Tigeot }; 25524edb884SFrançois Tigeot 25624edb884SFrançois Tigeot struct drm_dp_remote_i2c_read { 25724edb884SFrançois Tigeot u8 num_transactions; 25824edb884SFrançois Tigeot u8 port_number; 25924edb884SFrançois Tigeot struct { 26024edb884SFrançois Tigeot u8 i2c_dev_id; 26124edb884SFrançois Tigeot u8 num_bytes; 26224edb884SFrançois Tigeot u8 *bytes; 26324edb884SFrançois Tigeot u8 no_stop_bit; 26424edb884SFrançois Tigeot u8 i2c_transaction_delay; 26524edb884SFrançois Tigeot } transactions[4]; 26624edb884SFrançois Tigeot u8 read_i2c_device_id; 26724edb884SFrançois Tigeot u8 num_bytes_read; 26824edb884SFrançois Tigeot }; 26924edb884SFrançois Tigeot 27024edb884SFrançois Tigeot struct drm_dp_remote_i2c_write { 27124edb884SFrançois Tigeot u8 port_number; 27224edb884SFrançois Tigeot u8 write_i2c_device_id; 27324edb884SFrançois Tigeot u8 num_bytes; 27424edb884SFrançois Tigeot u8 *bytes; 27524edb884SFrançois Tigeot }; 27624edb884SFrançois Tigeot 27724edb884SFrançois Tigeot /* this covers ENUM_RESOURCES, POWER_DOWN_PHY, POWER_UP_PHY */ 27824edb884SFrançois Tigeot struct drm_dp_port_number_req { 27924edb884SFrançois Tigeot u8 port_number; 28024edb884SFrançois Tigeot }; 28124edb884SFrançois Tigeot 28224edb884SFrançois Tigeot struct drm_dp_enum_path_resources_ack_reply { 28324edb884SFrançois Tigeot u8 port_number; 28424edb884SFrançois Tigeot u16 full_payload_bw_number; 28524edb884SFrançois Tigeot u16 avail_payload_bw_number; 28624edb884SFrançois Tigeot }; 28724edb884SFrançois Tigeot 28824edb884SFrançois Tigeot /* covers POWER_DOWN_PHY, POWER_UP_PHY */ 28924edb884SFrançois Tigeot struct drm_dp_port_number_rep { 29024edb884SFrançois Tigeot u8 port_number; 29124edb884SFrançois Tigeot }; 29224edb884SFrançois Tigeot 29324edb884SFrançois Tigeot struct drm_dp_query_payload { 29424edb884SFrançois Tigeot u8 port_number; 29524edb884SFrançois Tigeot u8 vcpi; 29624edb884SFrançois Tigeot }; 29724edb884SFrançois Tigeot 29824edb884SFrançois Tigeot struct drm_dp_resource_status_notify { 29924edb884SFrançois Tigeot u8 port_number; 30024edb884SFrançois Tigeot u8 guid[16]; 30124edb884SFrançois Tigeot u16 available_pbn; 30224edb884SFrançois Tigeot }; 30324edb884SFrançois Tigeot 30424edb884SFrançois Tigeot struct drm_dp_query_payload_ack_reply { 30524edb884SFrançois Tigeot u8 port_number; 30624edb884SFrançois Tigeot u8 allocated_pbn; 30724edb884SFrançois Tigeot }; 30824edb884SFrançois Tigeot 30924edb884SFrançois Tigeot struct drm_dp_sideband_msg_req_body { 31024edb884SFrançois Tigeot u8 req_type; 31124edb884SFrançois Tigeot union ack_req { 31224edb884SFrançois Tigeot struct drm_dp_connection_status_notify conn_stat; 31324edb884SFrançois Tigeot struct drm_dp_port_number_req port_num; 31424edb884SFrançois Tigeot struct drm_dp_resource_status_notify resource_stat; 31524edb884SFrançois Tigeot 31624edb884SFrançois Tigeot struct drm_dp_query_payload query_payload; 31724edb884SFrançois Tigeot struct drm_dp_allocate_payload allocate_payload; 31824edb884SFrançois Tigeot 31924edb884SFrançois Tigeot struct drm_dp_remote_dpcd_read dpcd_read; 32024edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write dpcd_write; 32124edb884SFrançois Tigeot 32224edb884SFrançois Tigeot struct drm_dp_remote_i2c_read i2c_read; 32324edb884SFrançois Tigeot struct drm_dp_remote_i2c_write i2c_write; 32424edb884SFrançois Tigeot } u; 32524edb884SFrançois Tigeot }; 32624edb884SFrançois Tigeot 32724edb884SFrançois Tigeot struct drm_dp_sideband_msg_reply_body { 32824edb884SFrançois Tigeot u8 reply_type; 32924edb884SFrançois Tigeot u8 req_type; 33024edb884SFrançois Tigeot union ack_replies { 33124edb884SFrançois Tigeot struct drm_dp_nak_reply nak; 33224edb884SFrançois Tigeot struct drm_dp_link_address_ack_reply link_addr; 33324edb884SFrançois Tigeot struct drm_dp_port_number_rep port_number; 33424edb884SFrançois Tigeot 33524edb884SFrançois Tigeot struct drm_dp_enum_path_resources_ack_reply path_resources; 33624edb884SFrançois Tigeot struct drm_dp_allocate_payload_ack_reply allocate_payload; 33724edb884SFrançois Tigeot struct drm_dp_query_payload_ack_reply query_payload; 33824edb884SFrançois Tigeot 33924edb884SFrançois Tigeot struct drm_dp_remote_dpcd_read_ack_reply remote_dpcd_read_ack; 34024edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write_ack_reply remote_dpcd_write_ack; 34124edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write_nak_reply remote_dpcd_write_nack; 34224edb884SFrançois Tigeot 34324edb884SFrançois Tigeot struct drm_dp_remote_i2c_read_ack_reply remote_i2c_read_ack; 34424edb884SFrançois Tigeot struct drm_dp_remote_i2c_read_nak_reply remote_i2c_read_nack; 34524edb884SFrançois Tigeot struct drm_dp_remote_i2c_write_ack_reply remote_i2c_write_ack; 34624edb884SFrançois Tigeot } u; 34724edb884SFrançois Tigeot }; 34824edb884SFrançois Tigeot 34924edb884SFrançois Tigeot /* msg is queued to be put into a slot */ 35024edb884SFrançois Tigeot #define DRM_DP_SIDEBAND_TX_QUEUED 0 35124edb884SFrançois Tigeot /* msg has started transmitting on a slot - still on msgq */ 35224edb884SFrançois Tigeot #define DRM_DP_SIDEBAND_TX_START_SEND 1 35324edb884SFrançois Tigeot /* msg has finished transmitting on a slot - removed from msgq only in slot */ 35424edb884SFrançois Tigeot #define DRM_DP_SIDEBAND_TX_SENT 2 35524edb884SFrançois Tigeot /* msg has received a response - removed from slot */ 35624edb884SFrançois Tigeot #define DRM_DP_SIDEBAND_TX_RX 3 35724edb884SFrançois Tigeot #define DRM_DP_SIDEBAND_TX_TIMEOUT 4 35824edb884SFrançois Tigeot 35924edb884SFrançois Tigeot struct drm_dp_sideband_msg_tx { 36024edb884SFrançois Tigeot u8 msg[256]; 36124edb884SFrançois Tigeot u8 chunk[48]; 36224edb884SFrançois Tigeot u8 cur_offset; 36324edb884SFrançois Tigeot u8 cur_len; 36424edb884SFrançois Tigeot struct drm_dp_mst_branch *dst; 36524edb884SFrançois Tigeot struct list_head next; 36624edb884SFrançois Tigeot int seqno; 36724edb884SFrançois Tigeot int state; 36824edb884SFrançois Tigeot bool path_msg; 36924edb884SFrançois Tigeot struct drm_dp_sideband_msg_reply_body reply; 37024edb884SFrançois Tigeot }; 37124edb884SFrançois Tigeot 37224edb884SFrançois Tigeot /* sideband msg handler */ 37324edb884SFrançois Tigeot struct drm_dp_mst_topology_mgr; 37424edb884SFrançois Tigeot struct drm_dp_mst_topology_cbs { 37524edb884SFrançois Tigeot /* create a connector for a port */ 3762c9916cdSFrançois Tigeot struct drm_connector *(*add_connector)(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *path); 37724edb884SFrançois Tigeot void (*destroy_connector)(struct drm_dp_mst_topology_mgr *mgr, 37824edb884SFrançois Tigeot struct drm_connector *connector); 37924edb884SFrançois Tigeot void (*hotplug)(struct drm_dp_mst_topology_mgr *mgr); 38024edb884SFrançois Tigeot 38124edb884SFrançois Tigeot }; 38224edb884SFrançois Tigeot 38324edb884SFrançois Tigeot #define DP_MAX_PAYLOAD (sizeof(unsigned long) * 8) 38424edb884SFrançois Tigeot 38524edb884SFrançois Tigeot #define DP_PAYLOAD_LOCAL 1 38624edb884SFrançois Tigeot #define DP_PAYLOAD_REMOTE 2 38724edb884SFrançois Tigeot #define DP_PAYLOAD_DELETE_LOCAL 3 38824edb884SFrançois Tigeot 38924edb884SFrançois Tigeot struct drm_dp_payload { 39024edb884SFrançois Tigeot int payload_state; 39124edb884SFrançois Tigeot int start_slot; 39224edb884SFrançois Tigeot int num_slots; 3932c9916cdSFrançois Tigeot int vcpi; 39424edb884SFrançois Tigeot }; 39524edb884SFrançois Tigeot 39624edb884SFrançois Tigeot /** 39724edb884SFrançois Tigeot * struct drm_dp_mst_topology_mgr - DisplayPort MST manager 39824edb884SFrançois Tigeot * @dev: device pointer for adding i2c devices etc. 39924edb884SFrançois Tigeot * @cbs: callbacks for connector addition and destruction. 40024edb884SFrançois Tigeot * @max_dpcd_transaction_bytes - maximum number of bytes to read/write in one go. 40124edb884SFrançois Tigeot * @aux: aux channel for the DP connector. 40224edb884SFrançois Tigeot * @max_payloads: maximum number of payloads the GPU can generate. 40324edb884SFrançois Tigeot * @conn_base_id: DRM connector ID this mgr is connected to. 40424edb884SFrançois Tigeot * @down_rep_recv: msg receiver state for down replies. 40524edb884SFrançois Tigeot * @up_req_recv: msg receiver state for up requests. 40624edb884SFrançois Tigeot * @lock: protects mst state, primary, guid, dpcd. 40724edb884SFrançois Tigeot * @mst_state: if this manager is enabled for an MST capable port. 40824edb884SFrançois Tigeot * @mst_primary: pointer to the primary branch device. 40924edb884SFrançois Tigeot * @guid_valid: GUID valid for the primary branch device. 41024edb884SFrançois Tigeot * @guid: GUID for primary port. 41124edb884SFrançois Tigeot * @dpcd: cache of DPCD for primary port. 41224edb884SFrançois Tigeot * @pbn_div: PBN to slots divisor. 41324edb884SFrançois Tigeot * 41424edb884SFrançois Tigeot * This struct represents the toplevel displayport MST topology manager. 41524edb884SFrançois Tigeot * There should be one instance of this for every MST capable DP connector 41624edb884SFrançois Tigeot * on the GPU. 41724edb884SFrançois Tigeot */ 41824edb884SFrançois Tigeot struct drm_dp_mst_topology_mgr { 41924edb884SFrançois Tigeot 42024edb884SFrançois Tigeot struct device *dev; 42124edb884SFrançois Tigeot struct drm_dp_mst_topology_cbs *cbs; 42224edb884SFrançois Tigeot int max_dpcd_transaction_bytes; 42324edb884SFrançois Tigeot struct drm_dp_aux *aux; /* auxch for this topology mgr to use */ 42424edb884SFrançois Tigeot int max_payloads; 42524edb884SFrançois Tigeot int conn_base_id; 42624edb884SFrançois Tigeot 42724edb884SFrançois Tigeot /* only ever accessed from the workqueue - which should be serialised */ 42824edb884SFrançois Tigeot struct drm_dp_sideband_msg_rx down_rep_recv; 42924edb884SFrançois Tigeot struct drm_dp_sideband_msg_rx up_req_recv; 43024edb884SFrançois Tigeot 43124edb884SFrançois Tigeot /* pointer to info about the initial MST device */ 43224edb884SFrançois Tigeot struct lock lock; /* protects mst_state + primary + guid + dpcd */ 43324edb884SFrançois Tigeot 43424edb884SFrançois Tigeot bool mst_state; 43524edb884SFrançois Tigeot struct drm_dp_mst_branch *mst_primary; 43624edb884SFrançois Tigeot /* primary MST device GUID */ 43724edb884SFrançois Tigeot bool guid_valid; 43824edb884SFrançois Tigeot u8 guid[16]; 43924edb884SFrançois Tigeot u8 dpcd[DP_RECEIVER_CAP_SIZE]; 44024edb884SFrançois Tigeot u8 sink_count; 44124edb884SFrançois Tigeot int pbn_div; 44224edb884SFrançois Tigeot int total_slots; 44324edb884SFrançois Tigeot int avail_slots; 44424edb884SFrançois Tigeot int total_pbn; 44524edb884SFrançois Tigeot 44624edb884SFrançois Tigeot /* messages to be transmitted */ 44724edb884SFrançois Tigeot /* qlock protects the upq/downq and in_progress, 44824edb884SFrançois Tigeot the mstb tx_slots and txmsg->state once they are queued */ 44924edb884SFrançois Tigeot struct lock qlock; 45024edb884SFrançois Tigeot struct list_head tx_msg_downq; 45124edb884SFrançois Tigeot struct list_head tx_msg_upq; 45224edb884SFrançois Tigeot bool tx_down_in_progress; 45324edb884SFrançois Tigeot bool tx_up_in_progress; 45424edb884SFrançois Tigeot 45524edb884SFrançois Tigeot /* payload info + lock for it */ 45624edb884SFrançois Tigeot struct lock payload_lock; 45724edb884SFrançois Tigeot struct drm_dp_vcpi **proposed_vcpis; 45824edb884SFrançois Tigeot struct drm_dp_payload *payloads; 45924edb884SFrançois Tigeot unsigned long payload_mask; 4602c9916cdSFrançois Tigeot unsigned long vcpi_mask; 46124edb884SFrançois Tigeot 46224edb884SFrançois Tigeot wait_queue_head_t tx_waitq; 46324edb884SFrançois Tigeot struct work_struct work; 46424edb884SFrançois Tigeot 46524edb884SFrançois Tigeot struct work_struct tx_work; 46624edb884SFrançois Tigeot }; 46724edb884SFrançois Tigeot 46824edb884SFrançois Tigeot int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr, struct device *dev, struct drm_dp_aux *aux, int max_dpcd_transaction_bytes, int max_payloads, int conn_base_id); 46924edb884SFrançois Tigeot 47024edb884SFrançois Tigeot void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr); 47124edb884SFrançois Tigeot 47224edb884SFrançois Tigeot 47324edb884SFrançois Tigeot int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state); 47424edb884SFrançois Tigeot 47524edb884SFrançois Tigeot 47624edb884SFrançois Tigeot int drm_dp_mst_hpd_irq(struct drm_dp_mst_topology_mgr *mgr, u8 *esi, bool *handled); 47724edb884SFrançois Tigeot 47824edb884SFrançois Tigeot 4792c9916cdSFrançois 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); 48024edb884SFrançois Tigeot 48124edb884SFrançois 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); 48224edb884SFrançois Tigeot 48324edb884SFrançois Tigeot 48424edb884SFrançois Tigeot int drm_dp_calc_pbn_mode(int clock, int bpp); 48524edb884SFrançois Tigeot 48624edb884SFrançois Tigeot 48724edb884SFrançois Tigeot bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, int pbn, int *slots); 48824edb884SFrançois Tigeot 489*477eb7f9SFrançois Tigeot int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); 490*477eb7f9SFrançois Tigeot 49124edb884SFrançois Tigeot 49224edb884SFrançois Tigeot void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); 49324edb884SFrançois Tigeot 49424edb884SFrançois Tigeot 49524edb884SFrançois Tigeot void drm_dp_mst_deallocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, 49624edb884SFrançois Tigeot struct drm_dp_mst_port *port); 49724edb884SFrançois Tigeot 49824edb884SFrançois Tigeot 49924edb884SFrançois Tigeot int drm_dp_find_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, 50024edb884SFrançois Tigeot int pbn); 50124edb884SFrançois Tigeot 50224edb884SFrançois Tigeot 50324edb884SFrançois Tigeot int drm_dp_update_payload_part1(struct drm_dp_mst_topology_mgr *mgr); 50424edb884SFrançois Tigeot 50524edb884SFrançois Tigeot 50624edb884SFrançois Tigeot int drm_dp_update_payload_part2(struct drm_dp_mst_topology_mgr *mgr); 50724edb884SFrançois Tigeot 50824edb884SFrançois Tigeot int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr); 50924edb884SFrançois Tigeot 51024edb884SFrançois Tigeot void drm_dp_mst_dump_topology(struct seq_file *m, 51124edb884SFrançois Tigeot struct drm_dp_mst_topology_mgr *mgr); 51224edb884SFrançois Tigeot 51324edb884SFrançois Tigeot void drm_dp_mst_topology_mgr_suspend(struct drm_dp_mst_topology_mgr *mgr); 51424edb884SFrançois Tigeot int drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr); 51524edb884SFrançois Tigeot #endif 516