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26 #ifndef DC_INC_LINK_ENC_CFG_H_
27 #define DC_INC_LINK_ENC_CFG_H_
29 /* This module implements functionality for dynamically assigning DIG link
30 * encoder resources to display endpoints (links).
33 #include "core_types.h"
36 * Initialise link encoder resource tracking.
38 void link_enc_cfg_init(
40 struct dc_state *state);
43 * Copies a link encoder assignment from another state.
45 void link_enc_cfg_copy(const struct dc_state *src_ctx, struct dc_state *dst_ctx);
48 * Algorithm for assigning available DIG link encoders to streams.
50 * Update link_enc_assignments table and link_enc_avail list accordingly in
51 * struct resource_context.
53 * Loop over all streams twice:
54 * a) First assign encoders to unmappable endpoints.
55 * b) Then assign encoders to mappable endpoints.
57 void link_enc_cfg_link_encs_assign(
59 struct dc_state *state,
60 struct dc_stream_state *streams[],
61 uint8_t stream_count);
64 * Unassign a link encoder from a stream.
66 * Update link_enc_assignments table and link_enc_avail list accordingly in
67 * struct resource_context.
69 void link_enc_cfg_link_enc_unassign(
70 struct dc_state *state,
71 struct dc_stream_state *stream);
74 * Check whether the transmitter driven by a link encoder is a mappable
77 bool link_enc_cfg_is_transmitter_mappable(
79 struct link_encoder *link_enc);
81 /* Return stream using DIG link encoder resource. NULL if unused. */
82 struct dc_stream_state *link_enc_cfg_get_stream_using_link_enc(
84 enum engine_id eng_id);
86 /* Return link using DIG link encoder resource. NULL if unused. */
87 struct dc_link *link_enc_cfg_get_link_using_link_enc(
89 enum engine_id eng_id);
91 /* Return DIG link encoder used by link. NULL if unused. */
92 struct link_encoder *link_enc_cfg_get_link_enc_used_by_link(
94 const struct dc_link *link);
96 /* Return next available DIG link encoder. NULL if none available. */
97 struct link_encoder *link_enc_cfg_get_next_avail_link_enc(struct dc *dc);
99 /* Return DIG link encoder used by stream. NULL if unused. */
100 struct link_encoder *link_enc_cfg_get_link_enc_used_by_stream(
102 const struct dc_stream_state *stream);
104 /* Return DIG link encoder. NULL if unused. */
105 struct link_encoder *link_enc_cfg_get_link_enc(const struct dc_link *link);
107 /* Return DIG link encoder used by stream in current/previous state. NULL if unused. */
108 struct link_encoder *link_enc_cfg_get_link_enc_used_by_stream_current(
110 const struct dc_stream_state *stream);
112 /* Return true if encoder available to use. */
113 bool link_enc_cfg_is_link_enc_avail(struct dc *dc, enum engine_id eng_id, struct dc_link *link);
115 /* Returns true if encoder assignments in supplied state pass validity checks. */
116 bool link_enc_cfg_validate(struct dc *dc, struct dc_state *state);
118 /* Set the link encoder assignment mode for the current_state to LINK_ENC_CFG_TRANSIENT mode.
119 * This indicates that a new_state is in the process of being applied to hardware.
120 * During this transition, old and new encoder assignments should be accessible from the old_state.
121 * Only allow transition into transient mode if new encoder assignments are valid.
123 void link_enc_cfg_set_transient_mode(struct dc *dc, struct dc_state *current_state, struct dc_state *new_state);
125 #endif /* DC_INC_LINK_ENC_CFG_H_ */