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 * @port_num: port number 4824edb884SFrançois Tigeot * @input: if this port is an input port. 4924edb884SFrançois Tigeot * @mcs: message capability status - DP 1.2 spec. 5024edb884SFrançois Tigeot * @ddps: DisplayPort Device Plug Status - DP 1.2 5124edb884SFrançois Tigeot * @pdt: Peer Device Type 5224edb884SFrançois Tigeot * @ldps: Legacy Device Plug Status 5324edb884SFrançois Tigeot * @dpcd_rev: DPCD revision of device on this port 5424edb884SFrançois Tigeot * @num_sdp_streams: Number of simultaneous streams 5524edb884SFrançois Tigeot * @num_sdp_stream_sinks: Number of stream sinks 5624edb884SFrançois Tigeot * @available_pbn: Available bandwidth for this port. 5724edb884SFrançois Tigeot * @next: link to next port on this branch device 5824edb884SFrançois Tigeot * @mstb: branch device attach below this port 5924edb884SFrançois Tigeot * @aux: i2c aux transport to talk to device connected to this port. 6024edb884SFrançois Tigeot * @parent: branch device parent of this port 6124edb884SFrançois Tigeot * @vcpi: Virtual Channel Payload info for this port. 6224edb884SFrançois Tigeot * @connector: DRM connector this port is connected to. 6324edb884SFrançois Tigeot * @mgr: topology manager this port lives under. 6424edb884SFrançois Tigeot * 6524edb884SFrançois Tigeot * This structure represents an MST port endpoint on a device somewhere 6624edb884SFrançois Tigeot * in the MST topology. 6724edb884SFrançois Tigeot */ 6824edb884SFrançois Tigeot struct drm_dp_mst_port { 6924edb884SFrançois Tigeot struct kref kref; 7024edb884SFrançois Tigeot 7124edb884SFrançois Tigeot u8 port_num; 7224edb884SFrançois Tigeot bool input; 7324edb884SFrançois Tigeot bool mcs; 7424edb884SFrançois Tigeot bool ddps; 7524edb884SFrançois Tigeot u8 pdt; 7624edb884SFrançois Tigeot bool ldps; 7724edb884SFrançois Tigeot u8 dpcd_rev; 7824edb884SFrançois Tigeot u8 num_sdp_streams; 7924edb884SFrançois Tigeot u8 num_sdp_stream_sinks; 8024edb884SFrançois Tigeot uint16_t available_pbn; 8124edb884SFrançois Tigeot struct list_head next; 8224edb884SFrançois Tigeot struct drm_dp_mst_branch *mstb; /* pointer to an mstb if this port has one */ 8324edb884SFrançois Tigeot struct drm_dp_aux aux; /* i2c bus for this port? */ 8424edb884SFrançois Tigeot struct drm_dp_mst_branch *parent; 8524edb884SFrançois Tigeot 8624edb884SFrançois Tigeot struct drm_dp_vcpi vcpi; 8724edb884SFrançois Tigeot struct drm_connector *connector; 8824edb884SFrançois Tigeot struct drm_dp_mst_topology_mgr *mgr; 892c9916cdSFrançois Tigeot 90*1dedbd3bSFrançois Tigeot /** 91*1dedbd3bSFrançois Tigeot * @cached_edid: for DP logical ports - make tiling work by ensuring 92*1dedbd3bSFrançois Tigeot * that the EDID for all connectors is read immediately. 93*1dedbd3bSFrançois Tigeot */ 94*1dedbd3bSFrançois Tigeot struct edid *cached_edid; 95*1dedbd3bSFrançois Tigeot /** 96*1dedbd3bSFrançois Tigeot * @has_audio: Tracks whether the sink connector to this port is 97*1dedbd3bSFrançois Tigeot * audio-capable. 98*1dedbd3bSFrançois Tigeot */ 99aee94f86SFrançois Tigeot bool has_audio; 10024edb884SFrançois Tigeot }; 10124edb884SFrançois Tigeot 10224edb884SFrançois Tigeot /** 10324edb884SFrançois Tigeot * struct drm_dp_mst_branch - MST branch device. 10424edb884SFrançois Tigeot * @kref: reference count for this port. 10524edb884SFrançois Tigeot * @rad: Relative Address to talk to this branch device. 10624edb884SFrançois Tigeot * @lct: Link count total to talk to this branch device. 10724edb884SFrançois Tigeot * @num_ports: number of ports on the branch. 10824edb884SFrançois Tigeot * @msg_slots: one bit per transmitted msg slot. 10924edb884SFrançois Tigeot * @ports: linked list of ports on this branch. 11024edb884SFrançois Tigeot * @port_parent: pointer to the port parent, NULL if toplevel. 11124edb884SFrançois Tigeot * @mgr: topology manager for this branch device. 11224edb884SFrançois Tigeot * @tx_slots: transmission slots for this device. 11324edb884SFrançois Tigeot * @last_seqno: last sequence number used to talk to this. 11424edb884SFrançois Tigeot * @link_address_sent: if a link address message has been sent to this device yet. 115aee94f86SFrançois Tigeot * @guid: guid for DP 1.2 branch device. port under this branch can be 116aee94f86SFrançois Tigeot * identified by port #. 11724edb884SFrançois Tigeot * 11824edb884SFrançois Tigeot * This structure represents an MST branch device, there is one 119aee94f86SFrançois Tigeot * primary branch device at the root, along with any other branches connected 120aee94f86SFrançois Tigeot * to downstream port of parent branches. 12124edb884SFrançois Tigeot */ 12224edb884SFrançois Tigeot struct drm_dp_mst_branch { 12324edb884SFrançois Tigeot struct kref kref; 12424edb884SFrançois Tigeot u8 rad[8]; 12524edb884SFrançois Tigeot u8 lct; 12624edb884SFrançois Tigeot int num_ports; 12724edb884SFrançois Tigeot 12824edb884SFrançois Tigeot int msg_slots; 12924edb884SFrançois Tigeot struct list_head ports; 13024edb884SFrançois Tigeot 13124edb884SFrançois Tigeot /* list of tx ops queue for this port */ 13224edb884SFrançois Tigeot struct drm_dp_mst_port *port_parent; 13324edb884SFrançois Tigeot struct drm_dp_mst_topology_mgr *mgr; 13424edb884SFrançois Tigeot 13524edb884SFrançois Tigeot /* slots are protected by mstb->mgr->qlock */ 13624edb884SFrançois Tigeot struct drm_dp_sideband_msg_tx *tx_slots[2]; 13724edb884SFrançois Tigeot int last_seqno; 13824edb884SFrançois Tigeot bool link_address_sent; 139aee94f86SFrançois Tigeot 140aee94f86SFrançois Tigeot /* global unique identifier to identify branch devices */ 141aee94f86SFrançois Tigeot u8 guid[16]; 14224edb884SFrançois Tigeot }; 14324edb884SFrançois Tigeot 14424edb884SFrançois Tigeot 14524edb884SFrançois Tigeot /* sideband msg header - not bit struct */ 14624edb884SFrançois Tigeot struct drm_dp_sideband_msg_hdr { 14724edb884SFrançois Tigeot u8 lct; 14824edb884SFrançois Tigeot u8 lcr; 14924edb884SFrançois Tigeot u8 rad[8]; 15024edb884SFrançois Tigeot bool broadcast; 15124edb884SFrançois Tigeot bool path_msg; 15224edb884SFrançois Tigeot u8 msg_len; 15324edb884SFrançois Tigeot bool somt; 15424edb884SFrançois Tigeot bool eomt; 15524edb884SFrançois Tigeot bool seqno; 15624edb884SFrançois Tigeot }; 15724edb884SFrançois Tigeot 15824edb884SFrançois Tigeot struct drm_dp_nak_reply { 15924edb884SFrançois Tigeot u8 guid[16]; 16024edb884SFrançois Tigeot u8 reason; 16124edb884SFrançois Tigeot u8 nak_data; 16224edb884SFrançois Tigeot }; 16324edb884SFrançois Tigeot 16424edb884SFrançois Tigeot struct drm_dp_link_address_ack_reply { 16524edb884SFrançois Tigeot u8 guid[16]; 16624edb884SFrançois Tigeot u8 nports; 16724edb884SFrançois Tigeot struct drm_dp_link_addr_reply_port { 16824edb884SFrançois Tigeot bool input_port; 16924edb884SFrançois Tigeot u8 peer_device_type; 17024edb884SFrançois Tigeot u8 port_number; 17124edb884SFrançois Tigeot bool mcs; 17224edb884SFrançois Tigeot bool ddps; 17324edb884SFrançois Tigeot bool legacy_device_plug_status; 17424edb884SFrançois Tigeot u8 dpcd_revision; 17524edb884SFrançois Tigeot u8 peer_guid[16]; 17624edb884SFrançois Tigeot u8 num_sdp_streams; 17724edb884SFrançois Tigeot u8 num_sdp_stream_sinks; 17824edb884SFrançois Tigeot } ports[16]; 17924edb884SFrançois Tigeot }; 18024edb884SFrançois Tigeot 18124edb884SFrançois Tigeot struct drm_dp_remote_dpcd_read_ack_reply { 18224edb884SFrançois Tigeot u8 port_number; 18324edb884SFrançois Tigeot u8 num_bytes; 18424edb884SFrançois Tigeot u8 bytes[255]; 18524edb884SFrançois Tigeot }; 18624edb884SFrançois Tigeot 18724edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write_ack_reply { 18824edb884SFrançois Tigeot u8 port_number; 18924edb884SFrançois Tigeot }; 19024edb884SFrançois Tigeot 19124edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write_nak_reply { 19224edb884SFrançois Tigeot u8 port_number; 19324edb884SFrançois Tigeot u8 reason; 19424edb884SFrançois Tigeot u8 bytes_written_before_failure; 19524edb884SFrançois Tigeot }; 19624edb884SFrançois Tigeot 19724edb884SFrançois Tigeot struct drm_dp_remote_i2c_read_ack_reply { 19824edb884SFrançois Tigeot u8 port_number; 19924edb884SFrançois Tigeot u8 num_bytes; 20024edb884SFrançois Tigeot u8 bytes[255]; 20124edb884SFrançois Tigeot }; 20224edb884SFrançois Tigeot 20324edb884SFrançois Tigeot struct drm_dp_remote_i2c_read_nak_reply { 20424edb884SFrançois Tigeot u8 port_number; 20524edb884SFrançois Tigeot u8 nak_reason; 20624edb884SFrançois Tigeot u8 i2c_nak_transaction; 20724edb884SFrançois Tigeot }; 20824edb884SFrançois Tigeot 20924edb884SFrançois Tigeot struct drm_dp_remote_i2c_write_ack_reply { 21024edb884SFrançois Tigeot u8 port_number; 21124edb884SFrançois Tigeot }; 21224edb884SFrançois Tigeot 21324edb884SFrançois Tigeot 21424edb884SFrançois Tigeot struct drm_dp_sideband_msg_rx { 21524edb884SFrançois Tigeot u8 chunk[48]; 21624edb884SFrançois Tigeot u8 msg[256]; 21724edb884SFrançois Tigeot u8 curchunk_len; 21824edb884SFrançois Tigeot u8 curchunk_idx; /* chunk we are parsing now */ 21924edb884SFrançois Tigeot u8 curchunk_hdrlen; 22024edb884SFrançois Tigeot u8 curlen; /* total length of the msg */ 22124edb884SFrançois Tigeot bool have_somt; 22224edb884SFrançois Tigeot bool have_eomt; 22324edb884SFrançois Tigeot struct drm_dp_sideband_msg_hdr initial_hdr; 22424edb884SFrançois Tigeot }; 22524edb884SFrançois Tigeot 226aee94f86SFrançois Tigeot #define DRM_DP_MAX_SDP_STREAMS 16 22724edb884SFrançois Tigeot struct drm_dp_allocate_payload { 22824edb884SFrançois Tigeot u8 port_number; 22924edb884SFrançois Tigeot u8 number_sdp_streams; 23024edb884SFrançois Tigeot u8 vcpi; 23124edb884SFrançois Tigeot u16 pbn; 232aee94f86SFrançois Tigeot u8 sdp_stream_sink[DRM_DP_MAX_SDP_STREAMS]; 23324edb884SFrançois Tigeot }; 23424edb884SFrançois Tigeot 23524edb884SFrançois Tigeot struct drm_dp_allocate_payload_ack_reply { 23624edb884SFrançois Tigeot u8 port_number; 23724edb884SFrançois Tigeot u8 vcpi; 23824edb884SFrançois Tigeot u16 allocated_pbn; 23924edb884SFrançois Tigeot }; 24024edb884SFrançois Tigeot 24124edb884SFrançois Tigeot struct drm_dp_connection_status_notify { 24224edb884SFrançois Tigeot u8 guid[16]; 24324edb884SFrançois Tigeot u8 port_number; 24424edb884SFrançois Tigeot bool legacy_device_plug_status; 24524edb884SFrançois Tigeot bool displayport_device_plug_status; 24624edb884SFrançois Tigeot bool message_capability_status; 24724edb884SFrançois Tigeot bool input_port; 24824edb884SFrançois Tigeot u8 peer_device_type; 24924edb884SFrançois Tigeot }; 25024edb884SFrançois Tigeot 25124edb884SFrançois Tigeot struct drm_dp_remote_dpcd_read { 25224edb884SFrançois Tigeot u8 port_number; 25324edb884SFrançois Tigeot u32 dpcd_address; 25424edb884SFrançois Tigeot u8 num_bytes; 25524edb884SFrançois Tigeot }; 25624edb884SFrançois Tigeot 25724edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write { 25824edb884SFrançois Tigeot u8 port_number; 25924edb884SFrançois Tigeot u32 dpcd_address; 26024edb884SFrançois Tigeot u8 num_bytes; 26124edb884SFrançois Tigeot u8 *bytes; 26224edb884SFrançois Tigeot }; 26324edb884SFrançois Tigeot 2640e1ba51bSFrançois Tigeot #define DP_REMOTE_I2C_READ_MAX_TRANSACTIONS 4 26524edb884SFrançois Tigeot struct drm_dp_remote_i2c_read { 26624edb884SFrançois Tigeot u8 num_transactions; 26724edb884SFrançois Tigeot u8 port_number; 26824edb884SFrançois Tigeot struct { 26924edb884SFrançois Tigeot u8 i2c_dev_id; 27024edb884SFrançois Tigeot u8 num_bytes; 27124edb884SFrançois Tigeot u8 *bytes; 27224edb884SFrançois Tigeot u8 no_stop_bit; 27324edb884SFrançois Tigeot u8 i2c_transaction_delay; 2740e1ba51bSFrançois Tigeot } transactions[DP_REMOTE_I2C_READ_MAX_TRANSACTIONS]; 27524edb884SFrançois Tigeot u8 read_i2c_device_id; 27624edb884SFrançois Tigeot u8 num_bytes_read; 27724edb884SFrançois Tigeot }; 27824edb884SFrançois Tigeot 27924edb884SFrançois Tigeot struct drm_dp_remote_i2c_write { 28024edb884SFrançois Tigeot u8 port_number; 28124edb884SFrançois Tigeot u8 write_i2c_device_id; 28224edb884SFrançois Tigeot u8 num_bytes; 28324edb884SFrançois Tigeot u8 *bytes; 28424edb884SFrançois Tigeot }; 28524edb884SFrançois Tigeot 28624edb884SFrançois Tigeot /* this covers ENUM_RESOURCES, POWER_DOWN_PHY, POWER_UP_PHY */ 28724edb884SFrançois Tigeot struct drm_dp_port_number_req { 28824edb884SFrançois Tigeot u8 port_number; 28924edb884SFrançois Tigeot }; 29024edb884SFrançois Tigeot 29124edb884SFrançois Tigeot struct drm_dp_enum_path_resources_ack_reply { 29224edb884SFrançois Tigeot u8 port_number; 29324edb884SFrançois Tigeot u16 full_payload_bw_number; 29424edb884SFrançois Tigeot u16 avail_payload_bw_number; 29524edb884SFrançois Tigeot }; 29624edb884SFrançois Tigeot 29724edb884SFrançois Tigeot /* covers POWER_DOWN_PHY, POWER_UP_PHY */ 29824edb884SFrançois Tigeot struct drm_dp_port_number_rep { 29924edb884SFrançois Tigeot u8 port_number; 30024edb884SFrançois Tigeot }; 30124edb884SFrançois Tigeot 30224edb884SFrançois Tigeot struct drm_dp_query_payload { 30324edb884SFrançois Tigeot u8 port_number; 30424edb884SFrançois Tigeot u8 vcpi; 30524edb884SFrançois Tigeot }; 30624edb884SFrançois Tigeot 30724edb884SFrançois Tigeot struct drm_dp_resource_status_notify { 30824edb884SFrançois Tigeot u8 port_number; 30924edb884SFrançois Tigeot u8 guid[16]; 31024edb884SFrançois Tigeot u16 available_pbn; 31124edb884SFrançois Tigeot }; 31224edb884SFrançois Tigeot 31324edb884SFrançois Tigeot struct drm_dp_query_payload_ack_reply { 31424edb884SFrançois Tigeot u8 port_number; 31524edb884SFrançois Tigeot u8 allocated_pbn; 31624edb884SFrançois Tigeot }; 31724edb884SFrançois Tigeot 31824edb884SFrançois Tigeot struct drm_dp_sideband_msg_req_body { 31924edb884SFrançois Tigeot u8 req_type; 32024edb884SFrançois Tigeot union ack_req { 32124edb884SFrançois Tigeot struct drm_dp_connection_status_notify conn_stat; 32224edb884SFrançois Tigeot struct drm_dp_port_number_req port_num; 32324edb884SFrançois Tigeot struct drm_dp_resource_status_notify resource_stat; 32424edb884SFrançois Tigeot 32524edb884SFrançois Tigeot struct drm_dp_query_payload query_payload; 32624edb884SFrançois Tigeot struct drm_dp_allocate_payload allocate_payload; 32724edb884SFrançois Tigeot 32824edb884SFrançois Tigeot struct drm_dp_remote_dpcd_read dpcd_read; 32924edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write dpcd_write; 33024edb884SFrançois Tigeot 33124edb884SFrançois Tigeot struct drm_dp_remote_i2c_read i2c_read; 33224edb884SFrançois Tigeot struct drm_dp_remote_i2c_write i2c_write; 33324edb884SFrançois Tigeot } u; 33424edb884SFrançois Tigeot }; 33524edb884SFrançois Tigeot 33624edb884SFrançois Tigeot struct drm_dp_sideband_msg_reply_body { 33724edb884SFrançois Tigeot u8 reply_type; 33824edb884SFrançois Tigeot u8 req_type; 33924edb884SFrançois Tigeot union ack_replies { 34024edb884SFrançois Tigeot struct drm_dp_nak_reply nak; 34124edb884SFrançois Tigeot struct drm_dp_link_address_ack_reply link_addr; 34224edb884SFrançois Tigeot struct drm_dp_port_number_rep port_number; 34324edb884SFrançois Tigeot 34424edb884SFrançois Tigeot struct drm_dp_enum_path_resources_ack_reply path_resources; 34524edb884SFrançois Tigeot struct drm_dp_allocate_payload_ack_reply allocate_payload; 34624edb884SFrançois Tigeot struct drm_dp_query_payload_ack_reply query_payload; 34724edb884SFrançois Tigeot 34824edb884SFrançois Tigeot struct drm_dp_remote_dpcd_read_ack_reply remote_dpcd_read_ack; 34924edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write_ack_reply remote_dpcd_write_ack; 35024edb884SFrançois Tigeot struct drm_dp_remote_dpcd_write_nak_reply remote_dpcd_write_nack; 35124edb884SFrançois Tigeot 35224edb884SFrançois Tigeot struct drm_dp_remote_i2c_read_ack_reply remote_i2c_read_ack; 35324edb884SFrançois Tigeot struct drm_dp_remote_i2c_read_nak_reply remote_i2c_read_nack; 35424edb884SFrançois Tigeot struct drm_dp_remote_i2c_write_ack_reply remote_i2c_write_ack; 35524edb884SFrançois Tigeot } u; 35624edb884SFrançois Tigeot }; 35724edb884SFrançois Tigeot 35824edb884SFrançois Tigeot /* msg is queued to be put into a slot */ 35924edb884SFrançois Tigeot #define DRM_DP_SIDEBAND_TX_QUEUED 0 36024edb884SFrançois Tigeot /* msg has started transmitting on a slot - still on msgq */ 36124edb884SFrançois Tigeot #define DRM_DP_SIDEBAND_TX_START_SEND 1 36224edb884SFrançois Tigeot /* msg has finished transmitting on a slot - removed from msgq only in slot */ 36324edb884SFrançois Tigeot #define DRM_DP_SIDEBAND_TX_SENT 2 36424edb884SFrançois Tigeot /* msg has received a response - removed from slot */ 36524edb884SFrançois Tigeot #define DRM_DP_SIDEBAND_TX_RX 3 36624edb884SFrançois Tigeot #define DRM_DP_SIDEBAND_TX_TIMEOUT 4 36724edb884SFrançois Tigeot 36824edb884SFrançois Tigeot struct drm_dp_sideband_msg_tx { 36924edb884SFrançois Tigeot u8 msg[256]; 37024edb884SFrançois Tigeot u8 chunk[48]; 37124edb884SFrançois Tigeot u8 cur_offset; 37224edb884SFrançois Tigeot u8 cur_len; 37324edb884SFrançois Tigeot struct drm_dp_mst_branch *dst; 37424edb884SFrançois Tigeot struct list_head next; 37524edb884SFrançois Tigeot int seqno; 37624edb884SFrançois Tigeot int state; 37724edb884SFrançois Tigeot bool path_msg; 37824edb884SFrançois Tigeot struct drm_dp_sideband_msg_reply_body reply; 37924edb884SFrançois Tigeot }; 38024edb884SFrançois Tigeot 38124edb884SFrançois Tigeot /* sideband msg handler */ 38224edb884SFrançois Tigeot struct drm_dp_mst_topology_mgr; 38324edb884SFrançois Tigeot struct drm_dp_mst_topology_cbs { 38424edb884SFrançois Tigeot /* create a connector for a port */ 3852c9916cdSFrançois Tigeot struct drm_connector *(*add_connector)(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *path); 3860e1ba51bSFrançois Tigeot void (*register_connector)(struct drm_connector *connector); 38724edb884SFrançois Tigeot void (*destroy_connector)(struct drm_dp_mst_topology_mgr *mgr, 38824edb884SFrançois Tigeot struct drm_connector *connector); 38924edb884SFrançois Tigeot void (*hotplug)(struct drm_dp_mst_topology_mgr *mgr); 39024edb884SFrançois Tigeot 39124edb884SFrançois Tigeot }; 39224edb884SFrançois Tigeot 39324edb884SFrançois Tigeot #define DP_MAX_PAYLOAD (sizeof(unsigned long) * 8) 39424edb884SFrançois Tigeot 39524edb884SFrançois Tigeot #define DP_PAYLOAD_LOCAL 1 39624edb884SFrançois Tigeot #define DP_PAYLOAD_REMOTE 2 39724edb884SFrançois Tigeot #define DP_PAYLOAD_DELETE_LOCAL 3 39824edb884SFrançois Tigeot 39924edb884SFrançois Tigeot struct drm_dp_payload { 40024edb884SFrançois Tigeot int payload_state; 40124edb884SFrançois Tigeot int start_slot; 40224edb884SFrançois Tigeot int num_slots; 4032c9916cdSFrançois Tigeot int vcpi; 40424edb884SFrançois Tigeot }; 40524edb884SFrançois Tigeot 40624edb884SFrançois Tigeot /** 40724edb884SFrançois Tigeot * struct drm_dp_mst_topology_mgr - DisplayPort MST manager 40824edb884SFrançois Tigeot * 40924edb884SFrançois Tigeot * This struct represents the toplevel displayport MST topology manager. 41024edb884SFrançois Tigeot * There should be one instance of this for every MST capable DP connector 41124edb884SFrançois Tigeot * on the GPU. 41224edb884SFrançois Tigeot */ 41324edb884SFrançois Tigeot struct drm_dp_mst_topology_mgr { 414*1dedbd3bSFrançois Tigeot /** 415*1dedbd3bSFrançois Tigeot * @dev: device pointer for adding i2c devices etc. 416*1dedbd3bSFrançois Tigeot */ 41724edb884SFrançois Tigeot struct device *dev; 418*1dedbd3bSFrançois Tigeot /** 419*1dedbd3bSFrançois Tigeot * @cbs: callbacks for connector addition and destruction. 420*1dedbd3bSFrançois Tigeot */ 421aee94f86SFrançois Tigeot const struct drm_dp_mst_topology_cbs *cbs; 422*1dedbd3bSFrançois Tigeot /** 423*1dedbd3bSFrançois Tigeot * @max_dpcd_transaction_bytes: maximum number of bytes to read/write 424*1dedbd3bSFrançois Tigeot * in one go. 425*1dedbd3bSFrançois Tigeot */ 42624edb884SFrançois Tigeot int max_dpcd_transaction_bytes; 427*1dedbd3bSFrançois Tigeot /** 428*1dedbd3bSFrançois Tigeot * @aux: AUX channel for the DP MST connector this topolgy mgr is 429*1dedbd3bSFrançois Tigeot * controlling. 430*1dedbd3bSFrançois Tigeot */ 431*1dedbd3bSFrançois Tigeot struct drm_dp_aux *aux; 432*1dedbd3bSFrançois Tigeot /** 433*1dedbd3bSFrançois Tigeot * @max_payloads: maximum number of payloads the GPU can generate. 434*1dedbd3bSFrançois Tigeot */ 43524edb884SFrançois Tigeot int max_payloads; 436*1dedbd3bSFrançois Tigeot /** 437*1dedbd3bSFrançois Tigeot * @conn_base_id: DRM connector ID this mgr is connected to. Only used 438*1dedbd3bSFrançois Tigeot * to build the MST connector path value. 439*1dedbd3bSFrançois Tigeot */ 44024edb884SFrançois Tigeot int conn_base_id; 44124edb884SFrançois Tigeot 442*1dedbd3bSFrançois Tigeot /** 443*1dedbd3bSFrançois Tigeot * @down_rep_recv: Message receiver state for down replies. This and 444*1dedbd3bSFrançois Tigeot * @up_req_recv are only ever access from the work item, which is 445*1dedbd3bSFrançois Tigeot * serialised. 446*1dedbd3bSFrançois Tigeot */ 44724edb884SFrançois Tigeot struct drm_dp_sideband_msg_rx down_rep_recv; 448*1dedbd3bSFrançois Tigeot /** 449*1dedbd3bSFrançois Tigeot * @up_req_recv: Message receiver state for up requests. This and 450*1dedbd3bSFrançois Tigeot * @down_rep_recv are only ever access from the work item, which is 451*1dedbd3bSFrançois Tigeot * serialised. 452*1dedbd3bSFrançois Tigeot */ 45324edb884SFrançois Tigeot struct drm_dp_sideband_msg_rx up_req_recv; 45424edb884SFrançois Tigeot 455*1dedbd3bSFrançois Tigeot /** 456*1dedbd3bSFrançois Tigeot * @lock: protects mst state, primary, dpcd. 457*1dedbd3bSFrançois Tigeot */ 458*1dedbd3bSFrançois Tigeot struct lock lock; 45924edb884SFrançois Tigeot 460*1dedbd3bSFrançois Tigeot /** 461*1dedbd3bSFrançois Tigeot * @mst_state: If this manager is enabled for an MST capable port. False 462*1dedbd3bSFrançois Tigeot * if no MST sink/branch devices is connected. 463*1dedbd3bSFrançois Tigeot */ 46424edb884SFrançois Tigeot bool mst_state; 465*1dedbd3bSFrançois Tigeot /** 466*1dedbd3bSFrançois Tigeot * @mst_primary: Pointer to the primary/first branch device. 467*1dedbd3bSFrançois Tigeot */ 46824edb884SFrançois Tigeot struct drm_dp_mst_branch *mst_primary; 469aee94f86SFrançois Tigeot 470*1dedbd3bSFrançois Tigeot /** 471*1dedbd3bSFrançois Tigeot * @dpcd: Cache of DPCD for primary port. 472*1dedbd3bSFrançois Tigeot */ 47324edb884SFrançois Tigeot u8 dpcd[DP_RECEIVER_CAP_SIZE]; 474*1dedbd3bSFrançois Tigeot /** 475*1dedbd3bSFrançois Tigeot * @sink_count: Sink count from DEVICE_SERVICE_IRQ_VECTOR_ESI0. 476*1dedbd3bSFrançois Tigeot */ 47724edb884SFrançois Tigeot u8 sink_count; 478*1dedbd3bSFrançois Tigeot /** 479*1dedbd3bSFrançois Tigeot * @pbn_div: PBN to slots divisor. 480*1dedbd3bSFrançois Tigeot */ 48124edb884SFrançois Tigeot int pbn_div; 482*1dedbd3bSFrançois Tigeot /** 483*1dedbd3bSFrançois Tigeot * @total_slots: Total slots that can be allocated. 484*1dedbd3bSFrançois Tigeot */ 48524edb884SFrançois Tigeot int total_slots; 486*1dedbd3bSFrançois Tigeot /** 487*1dedbd3bSFrançois Tigeot * @avail_slots: Still available slots that can be allocated. 488*1dedbd3bSFrançois Tigeot */ 48924edb884SFrançois Tigeot int avail_slots; 490*1dedbd3bSFrançois Tigeot /** 491*1dedbd3bSFrançois Tigeot * @total_pbn: Total PBN count. 492*1dedbd3bSFrançois Tigeot */ 49324edb884SFrançois Tigeot int total_pbn; 49424edb884SFrançois Tigeot 495*1dedbd3bSFrançois Tigeot /** 496*1dedbd3bSFrançois Tigeot * @qlock: protects @tx_msg_downq, the tx_slots in struct 497*1dedbd3bSFrançois Tigeot * &drm_dp_mst_branch and txmsg->state once they are queued 498*1dedbd3bSFrançois Tigeot */ 49924edb884SFrançois Tigeot struct lock qlock; 500*1dedbd3bSFrançois Tigeot /** 501*1dedbd3bSFrançois Tigeot * @tx_msg_downq: List of pending down replies. 502*1dedbd3bSFrançois Tigeot */ 50324edb884SFrançois Tigeot struct list_head tx_msg_downq; 50424edb884SFrançois Tigeot 505*1dedbd3bSFrançois Tigeot /** 506*1dedbd3bSFrançois Tigeot * @payload_lock: Protect payload information. 507*1dedbd3bSFrançois Tigeot */ 50824edb884SFrançois Tigeot struct lock payload_lock; 509*1dedbd3bSFrançois Tigeot /** 510*1dedbd3bSFrançois Tigeot * @proposed_vcpis: Array of pointers for the new VCPI allocation. The 511*1dedbd3bSFrançois Tigeot * VCPI structure itself is embedded into the corresponding 512*1dedbd3bSFrançois Tigeot * &drm_dp_mst_port structure. 513*1dedbd3bSFrançois Tigeot */ 51424edb884SFrançois Tigeot struct drm_dp_vcpi **proposed_vcpis; 515*1dedbd3bSFrançois Tigeot /** 516*1dedbd3bSFrançois Tigeot * @payloads: Array of payloads. 517*1dedbd3bSFrançois Tigeot */ 51824edb884SFrançois Tigeot struct drm_dp_payload *payloads; 519*1dedbd3bSFrançois Tigeot /** 520*1dedbd3bSFrançois Tigeot * @payload_mask: Elements of @payloads actually in use. Since 521*1dedbd3bSFrançois Tigeot * reallocation of active outputs isn't possible gaps can be created by 522*1dedbd3bSFrançois Tigeot * disabling outputs out of order compared to how they've been enabled. 523*1dedbd3bSFrançois Tigeot */ 52424edb884SFrançois Tigeot unsigned long payload_mask; 525*1dedbd3bSFrançois Tigeot /** 526*1dedbd3bSFrançois Tigeot * @vcpi_mask: Similar to @payload_mask, but for @proposed_vcpis. 527*1dedbd3bSFrançois Tigeot */ 5282c9916cdSFrançois Tigeot unsigned long vcpi_mask; 52924edb884SFrançois Tigeot 530*1dedbd3bSFrançois Tigeot /** 531*1dedbd3bSFrançois Tigeot * @tx_waitq: Wait to queue stall for the tx worker. 532*1dedbd3bSFrançois Tigeot */ 53324edb884SFrançois Tigeot wait_queue_head_t tx_waitq; 534*1dedbd3bSFrançois Tigeot /** 535*1dedbd3bSFrançois Tigeot * @work: Probe work. 536*1dedbd3bSFrançois Tigeot */ 53724edb884SFrançois Tigeot struct work_struct work; 538*1dedbd3bSFrançois Tigeot /** 539*1dedbd3bSFrançois Tigeot * @tx_work: Sideband transmit worker. This can nest within the main 540*1dedbd3bSFrançois Tigeot * @work worker for each transaction @work launches. 541*1dedbd3bSFrançois Tigeot */ 54224edb884SFrançois Tigeot struct work_struct tx_work; 5430e1ba51bSFrançois Tigeot 544*1dedbd3bSFrançois Tigeot /** 545*1dedbd3bSFrançois Tigeot * @destroy_connector_list: List of to be destroyed connectors. 546*1dedbd3bSFrançois Tigeot */ 5470e1ba51bSFrançois Tigeot struct list_head destroy_connector_list; 548*1dedbd3bSFrançois Tigeot /** 549*1dedbd3bSFrançois Tigeot * @destroy_connector_lock: Protects @connector_list. 550*1dedbd3bSFrançois Tigeot */ 5510e1ba51bSFrançois Tigeot struct lock destroy_connector_lock; 552*1dedbd3bSFrançois Tigeot /** 553*1dedbd3bSFrançois Tigeot * @destroy_connector_work: Work item to destroy connectors. Needed to 554*1dedbd3bSFrançois Tigeot * avoid locking inversion. 555*1dedbd3bSFrançois Tigeot */ 5560e1ba51bSFrançois Tigeot struct work_struct destroy_connector_work; 55724edb884SFrançois Tigeot }; 55824edb884SFrançois Tigeot 55924edb884SFrançois 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); 56024edb884SFrançois Tigeot 56124edb884SFrançois Tigeot void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr); 56224edb884SFrançois Tigeot 56324edb884SFrançois Tigeot 56424edb884SFrançois Tigeot int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state); 56524edb884SFrançois Tigeot 56624edb884SFrançois Tigeot 56724edb884SFrançois Tigeot int drm_dp_mst_hpd_irq(struct drm_dp_mst_topology_mgr *mgr, u8 *esi, bool *handled); 56824edb884SFrançois Tigeot 56924edb884SFrançois Tigeot 5702c9916cdSFrançois 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); 57124edb884SFrançois Tigeot 572aee94f86SFrançois Tigeot bool drm_dp_mst_port_has_audio(struct drm_dp_mst_topology_mgr *mgr, 573aee94f86SFrançois Tigeot struct drm_dp_mst_port *port); 57424edb884SFrançois 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); 57524edb884SFrançois Tigeot 57624edb884SFrançois Tigeot 57724edb884SFrançois Tigeot int drm_dp_calc_pbn_mode(int clock, int bpp); 57824edb884SFrançois Tigeot 57924edb884SFrançois Tigeot 58024edb884SFrançois Tigeot bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, int pbn, int *slots); 58124edb884SFrançois Tigeot 582477eb7f9SFrançois Tigeot int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); 583477eb7f9SFrançois Tigeot 58424edb884SFrançois Tigeot 58524edb884SFrançois Tigeot void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); 58624edb884SFrançois Tigeot 58724edb884SFrançois Tigeot 58824edb884SFrançois Tigeot void drm_dp_mst_deallocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, 58924edb884SFrançois Tigeot struct drm_dp_mst_port *port); 59024edb884SFrançois Tigeot 59124edb884SFrançois Tigeot 59224edb884SFrançois Tigeot int drm_dp_find_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, 59324edb884SFrançois Tigeot int pbn); 59424edb884SFrançois Tigeot 59524edb884SFrançois Tigeot 59624edb884SFrançois Tigeot int drm_dp_update_payload_part1(struct drm_dp_mst_topology_mgr *mgr); 59724edb884SFrançois Tigeot 59824edb884SFrançois Tigeot 59924edb884SFrançois Tigeot int drm_dp_update_payload_part2(struct drm_dp_mst_topology_mgr *mgr); 60024edb884SFrançois Tigeot 60124edb884SFrançois Tigeot int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr); 60224edb884SFrançois Tigeot 60324edb884SFrançois Tigeot void drm_dp_mst_dump_topology(struct seq_file *m, 60424edb884SFrançois Tigeot struct drm_dp_mst_topology_mgr *mgr); 60524edb884SFrançois Tigeot 60624edb884SFrançois Tigeot void drm_dp_mst_topology_mgr_suspend(struct drm_dp_mst_topology_mgr *mgr); 60724edb884SFrançois Tigeot int drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr); 60824edb884SFrançois Tigeot #endif 609