/* * Copyright © 2014 Red Hat. * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that copyright * notice and this permission notice appear in supporting documentation, and * that the name of the copyright holders not be used in advertising or * publicity pertaining to distribution of the software without specific, * written prior permission. The copyright holders make no representations * about the suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE * OF THIS SOFTWARE. */ #ifndef _DRM_DP_MST_HELPER_H_ #define _DRM_DP_MST_HELPER_H_ #include <linux/types.h> #include <drm/display/drm_dp_helper.h> #include <drm/drm_atomic.h> #include <drm/drm_fixed.h> #if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS) #include <linux/stackdepot.h> #include <linux/timekeeping.h> enum drm_dp_mst_topology_ref_type { … }; struct drm_dp_mst_topology_ref_history { … }; #endif /* IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS) */ enum drm_dp_mst_payload_allocation { … }; struct drm_dp_mst_branch; /** * struct drm_dp_mst_port - MST port * @port_num: port number * @input: if this port is an input port. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @mcs: message capability status - DP 1.2 spec. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @ddps: DisplayPort Device Plug Status - DP 1.2. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @pdt: Peer Device Type. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @ldps: Legacy Device Plug Status. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @dpcd_rev: DPCD revision of device on this port. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @num_sdp_streams: Number of simultaneous streams. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @num_sdp_stream_sinks: Number of stream sinks. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @full_pbn: Max possible bandwidth for this port. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @next: link to next port on this branch device * @aux: i2c aux transport to talk to device connected to this port, protected * by &drm_dp_mst_topology_mgr.base.lock. * @passthrough_aux: parent aux to which DSC pass-through requests should be * sent, only set if DSC pass-through is possible. * @parent: branch device parent of this port * @connector: DRM connector this port is connected to. Protected by * &drm_dp_mst_topology_mgr.base.lock. * @mgr: topology manager this port lives under. * * This structure represents an MST port endpoint on a device somewhere * in the MST topology. */ struct drm_dp_mst_port { … }; /* sideband msg header - not bit struct */ struct drm_dp_sideband_msg_hdr { … }; struct drm_dp_sideband_msg_rx { … }; /** * struct drm_dp_mst_branch - MST branch device. * @rad: Relative Address to talk to this branch device. * @lct: Link count total to talk to this branch device. * @num_ports: number of ports on the branch. * @port_parent: pointer to the port parent, NULL if toplevel. * @mgr: topology manager for this branch device. * @link_address_sent: if a link address message has been sent to this device yet. * @guid: guid for DP 1.2 branch device. port under this branch can be * identified by port #. * * This structure represents an MST branch device, there is one * primary branch device at the root, along with any other branches connected * to downstream port of parent branches. */ struct drm_dp_mst_branch { … }; struct drm_dp_nak_reply { … }; struct drm_dp_link_address_ack_reply { … }; struct drm_dp_remote_dpcd_read_ack_reply { … }; struct drm_dp_remote_dpcd_write_ack_reply { … }; struct drm_dp_remote_dpcd_write_nak_reply { … }; struct drm_dp_remote_i2c_read_ack_reply { … }; struct drm_dp_remote_i2c_read_nak_reply { … }; struct drm_dp_remote_i2c_write_ack_reply { … }; struct drm_dp_query_stream_enc_status_ack_reply { … }; #define DRM_DP_MAX_SDP_STREAMS … struct drm_dp_allocate_payload { … }; struct drm_dp_allocate_payload_ack_reply { … }; struct drm_dp_connection_status_notify { … }; struct drm_dp_remote_dpcd_read { … }; struct drm_dp_remote_dpcd_write { … }; #define DP_REMOTE_I2C_READ_MAX_TRANSACTIONS … struct drm_dp_remote_i2c_read { … }; struct drm_dp_remote_i2c_write { … }; struct drm_dp_query_stream_enc_status { … }; /* this covers ENUM_RESOURCES, POWER_DOWN_PHY, POWER_UP_PHY */ struct drm_dp_port_number_req { … }; struct drm_dp_enum_path_resources_ack_reply { … }; /* covers POWER_DOWN_PHY, POWER_UP_PHY */ struct drm_dp_port_number_rep { … }; struct drm_dp_query_payload { … }; struct drm_dp_resource_status_notify { … }; struct drm_dp_query_payload_ack_reply { … }; struct drm_dp_sideband_msg_req_body { … }; struct drm_dp_sideband_msg_reply_body { … }; /* msg is queued to be put into a slot */ #define DRM_DP_SIDEBAND_TX_QUEUED … /* msg has started transmitting on a slot - still on msgq */ #define DRM_DP_SIDEBAND_TX_START_SEND … /* msg has finished transmitting on a slot - removed from msgq only in slot */ #define DRM_DP_SIDEBAND_TX_SENT … /* msg has received a response - removed from slot */ #define DRM_DP_SIDEBAND_TX_RX … #define DRM_DP_SIDEBAND_TX_TIMEOUT … struct drm_dp_sideband_msg_tx { … }; /* sideband msg handler */ struct drm_dp_mst_topology_mgr; struct drm_dp_mst_topology_cbs { … }; #define to_dp_mst_topology_state(x) … /** * struct drm_dp_mst_atomic_payload - Atomic state struct for an MST payload * * The primary atomic state structure for a given MST payload. Stores information like current * bandwidth allocation, intended action for this payload, etc. */ struct drm_dp_mst_atomic_payload { … }; /** * struct drm_dp_mst_topology_state - DisplayPort MST topology atomic state * * This struct represents the atomic state of the toplevel DisplayPort MST manager */ struct drm_dp_mst_topology_state { … }; #define to_dp_mst_topology_mgr(x) … /** * struct drm_dp_mst_topology_mgr - DisplayPort MST manager * * This struct represents the toplevel displayport MST topology manager. * There should be one instance of this for every MST capable DP connector * on the GPU. */ struct drm_dp_mst_topology_mgr { … }; int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr, struct drm_device *dev, struct drm_dp_aux *aux, int max_dpcd_transaction_bytes, int max_payloads, int conn_base_id); void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr); /** * enum drm_dp_mst_mode - sink's MST mode capability */ enum drm_dp_mst_mode { … }; enum drm_dp_mst_mode drm_dp_read_mst_cap(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]); int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state); int drm_dp_mst_hpd_irq_handle_event(struct drm_dp_mst_topology_mgr *mgr, const u8 *esi, u8 *ack, bool *handled); void drm_dp_mst_hpd_irq_send_new_request(struct drm_dp_mst_topology_mgr *mgr); int drm_dp_mst_detect_port(struct drm_connector *connector, struct drm_modeset_acquire_ctx *ctx, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); const struct drm_edid *drm_dp_mst_edid_read(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); fixed20_12 drm_dp_get_vc_payload_bw(const struct drm_dp_mst_topology_mgr *mgr, int link_rate, int link_lane_count); int drm_dp_calc_pbn_mode(int clock, int bpp); void drm_dp_mst_update_slots(struct drm_dp_mst_topology_state *mst_state, uint8_t link_encoding_cap); int drm_dp_add_payload_part1(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_topology_state *mst_state, struct drm_dp_mst_atomic_payload *payload); int drm_dp_add_payload_part2(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_atomic_payload *payload); void drm_dp_remove_payload_part1(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_topology_state *mst_state, struct drm_dp_mst_atomic_payload *payload); void drm_dp_remove_payload_part2(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_topology_state *mst_state, const struct drm_dp_mst_atomic_payload *old_payload, struct drm_dp_mst_atomic_payload *new_payload); int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr); void drm_dp_mst_dump_topology(struct seq_file *m, struct drm_dp_mst_topology_mgr *mgr); void drm_dp_mst_topology_mgr_suspend(struct drm_dp_mst_topology_mgr *mgr); int __must_check drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr, bool sync); ssize_t drm_dp_mst_dpcd_read(struct drm_dp_aux *aux, unsigned int offset, void *buffer, size_t size); ssize_t drm_dp_mst_dpcd_write(struct drm_dp_aux *aux, unsigned int offset, void *buffer, size_t size); int drm_dp_mst_connector_late_register(struct drm_connector *connector, struct drm_dp_mst_port *port); void drm_dp_mst_connector_early_unregister(struct drm_connector *connector, struct drm_dp_mst_port *port); struct drm_dp_mst_topology_state * drm_atomic_get_mst_topology_state(struct drm_atomic_state *state, struct drm_dp_mst_topology_mgr *mgr); struct drm_dp_mst_topology_state * drm_atomic_get_old_mst_topology_state(struct drm_atomic_state *state, struct drm_dp_mst_topology_mgr *mgr); struct drm_dp_mst_topology_state * drm_atomic_get_new_mst_topology_state(struct drm_atomic_state *state, struct drm_dp_mst_topology_mgr *mgr); struct drm_dp_mst_atomic_payload * drm_atomic_get_mst_payload_state(struct drm_dp_mst_topology_state *state, struct drm_dp_mst_port *port); bool drm_dp_mst_port_downstream_of_parent(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, struct drm_dp_mst_port *parent); int __must_check drm_dp_atomic_find_time_slots(struct drm_atomic_state *state, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, int pbn); int drm_dp_mst_atomic_enable_dsc(struct drm_atomic_state *state, struct drm_dp_mst_port *port, int pbn, bool enable); int __must_check drm_dp_mst_add_affected_dsc_crtcs(struct drm_atomic_state *state, struct drm_dp_mst_topology_mgr *mgr); int __must_check drm_dp_atomic_release_time_slots(struct drm_atomic_state *state, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); void drm_dp_mst_atomic_wait_for_dependencies(struct drm_atomic_state *state); int __must_check drm_dp_mst_atomic_setup_commit(struct drm_atomic_state *state); int drm_dp_send_power_updown_phy(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, bool power_up); int drm_dp_send_query_stream_enc_status(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, struct drm_dp_query_stream_enc_status_ack_reply *status); int __must_check drm_dp_mst_atomic_check_mgr(struct drm_atomic_state *state, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_topology_state *mst_state, struct drm_dp_mst_port **failing_port); int __must_check drm_dp_mst_atomic_check(struct drm_atomic_state *state); int __must_check drm_dp_mst_root_conn_atomic_check(struct drm_connector_state *new_conn_state, struct drm_dp_mst_topology_mgr *mgr); void drm_dp_mst_get_port_malloc(struct drm_dp_mst_port *port); void drm_dp_mst_put_port_malloc(struct drm_dp_mst_port *port); static inline bool drm_dp_mst_port_is_logical(struct drm_dp_mst_port *port) { … } struct drm_dp_aux *drm_dp_mst_aux_for_parent(struct drm_dp_mst_port *port); struct drm_dp_aux *drm_dp_mst_dsc_aux_for_port(struct drm_dp_mst_port *port); static inline struct drm_dp_mst_topology_state * to_drm_dp_mst_topology_state(struct drm_private_state *state) { … } extern const struct drm_private_state_funcs drm_dp_mst_topology_state_funcs; /** * __drm_dp_mst_state_iter_get - private atomic state iterator function for * macro-internal use * @state: &struct drm_atomic_state pointer * @mgr: pointer to the &struct drm_dp_mst_topology_mgr iteration cursor * @old_state: optional pointer to the old &struct drm_dp_mst_topology_state * iteration cursor * @new_state: optional pointer to the new &struct drm_dp_mst_topology_state * iteration cursor * @i: int iteration cursor, for macro-internal use * * Used by for_each_oldnew_mst_mgr_in_state(), * for_each_old_mst_mgr_in_state(), and for_each_new_mst_mgr_in_state(). Don't * call this directly. * * Returns: * True if the current &struct drm_private_obj is a &struct * drm_dp_mst_topology_mgr, false otherwise. */ static inline bool __drm_dp_mst_state_iter_get(struct drm_atomic_state *state, struct drm_dp_mst_topology_mgr **mgr, struct drm_dp_mst_topology_state **old_state, struct drm_dp_mst_topology_state **new_state, int i) { … } /** * for_each_oldnew_mst_mgr_in_state - iterate over all DP MST topology * managers in an atomic update * @__state: &struct drm_atomic_state pointer * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor * @old_state: &struct drm_dp_mst_topology_state iteration cursor for the old * state * @new_state: &struct drm_dp_mst_topology_state iteration cursor for the new * state * @__i: int iteration cursor, for macro-internal use * * This iterates over all DRM DP MST topology managers in an atomic update, * tracking both old and new state. This is useful in places where the state * delta needs to be considered, for example in atomic check functions. */ #define for_each_oldnew_mst_mgr_in_state(__state, mgr, old_state, new_state, __i) … /** * for_each_old_mst_mgr_in_state - iterate over all DP MST topology managers * in an atomic update * @__state: &struct drm_atomic_state pointer * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor * @old_state: &struct drm_dp_mst_topology_state iteration cursor for the old * state * @__i: int iteration cursor, for macro-internal use * * This iterates over all DRM DP MST topology managers in an atomic update, * tracking only the old state. This is useful in disable functions, where we * need the old state the hardware is still in. */ #define for_each_old_mst_mgr_in_state(__state, mgr, old_state, __i) … /** * for_each_new_mst_mgr_in_state - iterate over all DP MST topology managers * in an atomic update * @__state: &struct drm_atomic_state pointer * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor * @new_state: &struct drm_dp_mst_topology_state iteration cursor for the new * state * @__i: int iteration cursor, for macro-internal use * * This iterates over all DRM DP MST topology managers in an atomic update, * tracking only the new state. This is useful in enable functions, where we * need the new state the hardware should be in when the atomic commit * operation has completed. */ #define for_each_new_mst_mgr_in_state(__state, mgr, new_state, __i) … #endif
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