1 /* 2 * Copyright 2022 Advanced Micro Devices, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: AMD 23 * 24 */ 25 26 #ifndef __DC_LINK_H__ 27 #define __DC_LINK_H__ 28 29 /* FILE POLICY AND INTENDED USAGE: 30 * 31 * This header defines link component function interfaces aka link_service. 32 * link_service provides the only entry point to link functions with function 33 * pointer style. This header is strictly private in dc and should never be 34 * included by DM because it exposes too much dc detail including all dc 35 * private types defined in core_types.h. Otherwise it will break DM - DC 36 * encapsulation and turn DM into a maintenance nightmare. 37 * 38 * The following shows a link component relation map. 39 * 40 * DM to DC: 41 * DM includes dc.h 42 * dc_link_exports.c or other dc files implement dc.h 43 * 44 * DC to Link: 45 * dc_link_exports.c or other dc files include link.h 46 * link_factory.c implements link.h 47 * 48 * Link sub-component to Link sub-component: 49 * link_factory.c includes --> link_xxx.h 50 * link_xxx.c implements link_xxx.h 51 52 * As you can see if you ever need to add a new dc link function and call it on 53 * DM/dc side, it is very difficult because you will need layers of translation. 54 * The most appropriate approach to implement new requirements on DM/dc side is 55 * to extend or generalize the functionality of existing link function 56 * interfaces so minimal modification is needed outside link component to 57 * achieve your new requirements. This approach reduces or even eliminates the 58 * effort needed outside link component to support a new link feature. This also 59 * reduces code discrepancy among DMs to support the same link feature. If we 60 * test full code path on one version of DM, and there is no feature specific 61 * modification required on other DMs, then we can have higher confidence that 62 * the feature will run on other DMs and produce the same result. The following 63 * are some good examples to start with: 64 * 65 * - detect_link --> to add new link detection or capability retrieval routines 66 * 67 * - validate_mode_timing --> to add new timing validation conditions 68 * 69 * - set_dpms_on/set_dpms_off --> to include new link enablement sequences 70 * 71 * If you must add new link functions, you will need to: 72 * 1. declare the function pointer here under the suitable commented category. 73 * 2. Implement your function in the suitable link_xxx.c file. 74 * 3. Assign the function to link_service in link_factory.c 75 * 4. NEVER include link_xxx.h headers outside link component. 76 * 5. NEVER include link.h on DM side. 77 */ 78 #include "core_types.h" 79 80 struct link_service *link_create_link_service(void); 81 void link_destroy_link_service(struct link_service **link_srv); 82 83 struct link_init_data { 84 const struct dc *dc; 85 struct dc_context *ctx; /* TODO: remove 'dal' when DC is complete. */ 86 uint32_t connector_index; /* this will be mapped to the HPD pins */ 87 uint32_t link_index; /* this is mapped to DAL display_index 88 TODO: remove it when DC is complete. */ 89 bool is_dpia_link; 90 }; 91 92 struct ddc_service_init_data { 93 struct graphics_object_id id; 94 struct dc_context *ctx; 95 struct dc_link *link; 96 bool is_dpia_link; 97 }; 98 99 struct link_service { 100 /************************** Factory ***********************************/ 101 struct dc_link *(*create_link)( 102 const struct link_init_data *init_params); 103 void (*destroy_link)(struct dc_link **link); 104 105 106 /************************** Detection *********************************/ 107 bool (*detect_link)(struct dc_link *link, enum dc_detect_reason reason); 108 bool (*detect_connection_type)(struct dc_link *link, 109 enum dc_connection_type *type); 110 struct dc_sink *(*add_remote_sink)( 111 struct dc_link *link, 112 const uint8_t *edid, 113 int len, 114 struct dc_sink_init_data *init_data); 115 void (*remove_remote_sink)(struct dc_link *link, struct dc_sink *sink); 116 bool (*get_hpd_state)(struct dc_link *link); 117 struct gpio *(*get_hpd_gpio)(struct dc_bios *dcb, 118 struct graphics_object_id link_id, 119 struct gpio_service *gpio_service); 120 void (*enable_hpd)(const struct dc_link *link); 121 void (*disable_hpd)(const struct dc_link *link); 122 void (*enable_hpd_filter)(struct dc_link *link, bool enable); 123 bool (*reset_cur_dp_mst_topology)(struct dc_link *link); 124 const struct dc_link_status *(*get_status)(const struct dc_link *link); 125 bool (*is_hdcp1x_supported)(struct dc_link *link, 126 enum signal_type signal); 127 bool (*is_hdcp2x_supported)(struct dc_link *link, 128 enum signal_type signal); 129 void (*clear_dprx_states)(struct dc_link *link); 130 131 132 /*************************** Resource *********************************/ 133 void (*get_cur_res_map)(const struct dc *dc, uint32_t *map); 134 void (*restore_res_map)(const struct dc *dc, uint32_t *map); 135 void (*get_cur_link_res)(const struct dc_link *link, 136 struct link_resource *link_res); 137 138 139 /*************************** Validation *******************************/ 140 enum dc_status (*validate_mode_timing)( 141 const struct dc_stream_state *stream, 142 struct dc_link *link, 143 const struct dc_crtc_timing *timing); 144 uint32_t (*dp_link_bandwidth_kbps)( 145 const struct dc_link *link, 146 const struct dc_link_settings *link_settings); 147 bool (*validate_dpia_bandwidth)( 148 const struct dc_stream_state *stream, 149 const unsigned int num_streams); 150 151 152 /*************************** DPMS *************************************/ 153 void (*set_dpms_on)(struct dc_state *state, struct pipe_ctx *pipe_ctx); 154 void (*set_dpms_off)(struct pipe_ctx *pipe_ctx); 155 void (*resume)(struct dc_link *link); 156 void (*blank_all_dp_displays)(struct dc *dc); 157 void (*blank_all_edp_displays)(struct dc *dc); 158 void (*blank_dp_stream)(struct dc_link *link, bool hw_init); 159 enum dc_status (*increase_mst_payload)( 160 struct pipe_ctx *pipe_ctx, uint32_t req_pbn); 161 enum dc_status (*reduce_mst_payload)( 162 struct pipe_ctx *pipe_ctx, uint32_t req_pbn); 163 void (*set_dsc_on_stream)(struct pipe_ctx *pipe_ctx, bool enable); 164 bool (*set_dsc_enable)(struct pipe_ctx *pipe_ctx, bool enable); 165 bool (*update_dsc_config)(struct pipe_ctx *pipe_ctx); 166 167 168 /*************************** DDC **************************************/ 169 struct ddc_service *(*create_ddc_service)( 170 struct ddc_service_init_data *ddc_init_data); 171 void (*destroy_ddc_service)(struct ddc_service **ddc); 172 bool (*query_ddc_data)( 173 struct ddc_service *ddc, 174 uint32_t address, 175 uint8_t *write_buf, 176 uint32_t write_size, 177 uint8_t *read_buf, 178 uint32_t read_size); 179 int (*aux_transfer_raw)(struct ddc_service *ddc, 180 struct aux_payload *payload, 181 enum aux_return_code_type *operation_result); 182 bool (*aux_transfer_with_retries_no_mutex)(struct ddc_service *ddc, 183 struct aux_payload *payload); 184 bool (*is_in_aux_transaction_mode)(struct ddc_service *ddc); 185 uint32_t (*get_aux_defer_delay)(struct ddc_service *ddc); 186 187 188 /*************************** DP Capability ****************************/ 189 bool (*dp_is_sink_present)(struct dc_link *link); 190 bool (*dp_is_fec_supported)(const struct dc_link *link); 191 bool (*dp_is_128b_132b_signal)(struct pipe_ctx *pipe_ctx); 192 bool (*dp_get_max_link_enc_cap)(const struct dc_link *link, 193 struct dc_link_settings *max_link_enc_cap); 194 const struct dc_link_settings *(*dp_get_verified_link_cap)( 195 const struct dc_link *link); 196 enum dp_link_encoding (*dp_get_encoding_format)( 197 const struct dc_link_settings *link_settings); 198 bool (*dp_should_enable_fec)(const struct dc_link *link); 199 bool (*dp_decide_link_settings)( 200 struct dc_stream_state *stream, 201 struct dc_link_settings *link_setting); 202 enum dp_link_encoding (*mst_decide_link_encoding_format)( 203 const struct dc_link *link); 204 bool (*edp_decide_link_settings)(struct dc_link *link, 205 struct dc_link_settings *link_setting, uint32_t req_bw); 206 uint32_t (*bw_kbps_from_raw_frl_link_rate_data)(uint8_t bw); 207 bool (*dp_overwrite_extended_receiver_cap)(struct dc_link *link); 208 enum lttpr_mode (*dp_decide_lttpr_mode)(struct dc_link *link, 209 struct dc_link_settings *link_setting); 210 211 212 /*************************** DP DPIA/PHY ******************************/ 213 int (*dpia_handle_usb4_bandwidth_allocation_for_link)( 214 struct dc_link *link, int peak_bw); 215 void (*dpia_handle_bw_alloc_response)( 216 struct dc_link *link, uint8_t bw, uint8_t result); 217 void (*dp_set_drive_settings)( 218 struct dc_link *link, 219 const struct link_resource *link_res, 220 struct link_training_settings *lt_settings); 221 void (*dpcd_write_rx_power_ctrl)(struct dc_link *link, bool on); 222 223 224 /*************************** DP IRQ Handler ***************************/ 225 bool (*dp_parse_link_loss_status)( 226 struct dc_link *link, 227 union hpd_irq_data *hpd_irq_dpcd_data); 228 bool (*dp_should_allow_hpd_rx_irq)(const struct dc_link *link); 229 void (*dp_handle_link_loss)(struct dc_link *link); 230 enum dc_status (*dp_read_hpd_rx_irq_data)( 231 struct dc_link *link, 232 union hpd_irq_data *irq_data); 233 bool (*dp_handle_hpd_rx_irq)(struct dc_link *link, 234 union hpd_irq_data *out_hpd_irq_dpcd_data, 235 bool *out_link_loss, 236 bool defer_handling, bool *has_left_work); 237 238 239 /*************************** eDP Panel Control ************************/ 240 void (*edp_panel_backlight_power_on)( 241 struct dc_link *link, bool wait_for_hpd); 242 int (*edp_get_backlight_level)(const struct dc_link *link); 243 bool (*edp_get_backlight_level_nits)(struct dc_link *link, 244 uint32_t *backlight_millinits_avg, 245 uint32_t *backlight_millinits_peak); 246 bool (*edp_set_backlight_level)(const struct dc_link *link, 247 uint32_t backlight_pwm_u16_16, 248 uint32_t frame_ramp); 249 bool (*edp_set_backlight_level_nits)(struct dc_link *link, 250 bool isHDR, 251 uint32_t backlight_millinits, 252 uint32_t transition_time_in_ms); 253 int (*edp_get_target_backlight_pwm)(const struct dc_link *link); 254 bool (*edp_get_psr_state)( 255 const struct dc_link *link, enum dc_psr_state *state); 256 bool (*edp_set_psr_allow_active)( 257 struct dc_link *link, 258 const bool *allow_active, 259 bool wait, 260 bool force_static, 261 const unsigned int *power_opts); 262 bool (*edp_setup_psr)(struct dc_link *link, 263 const struct dc_stream_state *stream, 264 struct psr_config *psr_config, 265 struct psr_context *psr_context); 266 bool (*edp_set_sink_vtotal_in_psr_active)( 267 const struct dc_link *link, 268 uint16_t psr_vtotal_idle, 269 uint16_t psr_vtotal_su); 270 void (*edp_get_psr_residency)( 271 const struct dc_link *link, uint32_t *residency); 272 bool (*edp_wait_for_t12)(struct dc_link *link); 273 bool (*edp_is_ilr_optimization_required)(struct dc_link *link, 274 struct dc_crtc_timing *crtc_timing); 275 bool (*edp_backlight_enable_aux)(struct dc_link *link, bool enable); 276 void (*edp_add_delay_for_T9)(struct dc_link *link); 277 bool (*edp_receiver_ready_T9)(struct dc_link *link); 278 bool (*edp_receiver_ready_T7)(struct dc_link *link); 279 bool (*edp_power_alpm_dpcd_enable)(struct dc_link *link, bool enable); 280 281 282 /*************************** DP CTS ************************************/ 283 void (*dp_handle_automated_test)(struct dc_link *link); 284 bool (*dp_set_test_pattern)( 285 struct dc_link *link, 286 enum dp_test_pattern test_pattern, 287 enum dp_test_pattern_color_space test_pattern_color_space, 288 const struct link_training_settings *p_link_settings, 289 const unsigned char *p_custom_pattern, 290 unsigned int cust_pattern_size); 291 void (*dp_set_preferred_link_settings)(struct dc *dc, 292 struct dc_link_settings *link_setting, 293 struct dc_link *link); 294 void (*dp_set_preferred_training_settings)(struct dc *dc, 295 struct dc_link_settings *link_setting, 296 struct dc_link_training_overrides *lt_overrides, 297 struct dc_link *link, 298 bool skip_immediate_retrain); 299 300 301 /*************************** DP Trace *********************************/ 302 bool (*dp_trace_is_initialized)(struct dc_link *link); 303 void (*dp_trace_set_is_logged_flag)(struct dc_link *link, 304 bool in_detection, 305 bool is_logged); 306 bool (*dp_trace_is_logged)(struct dc_link *link, bool in_detection); 307 unsigned long long (*dp_trace_get_lt_end_timestamp)( 308 struct dc_link *link, bool in_detection); 309 const struct dp_trace_lt_counts *(*dp_trace_get_lt_counts)( 310 struct dc_link *link, bool in_detection); 311 unsigned int (*dp_trace_get_link_loss_count)(struct dc_link *link); 312 void (*dp_trace_set_edp_power_timestamp)(struct dc_link *link, 313 bool power_up); 314 uint64_t (*dp_trace_get_edp_poweron_timestamp)(struct dc_link *link); 315 uint64_t (*dp_trace_get_edp_poweroff_timestamp)(struct dc_link *link); 316 void (*dp_trace_source_sequence)( 317 struct dc_link *link, uint8_t dp_test_mode); 318 }; 319 #endif /* __DC_LINK_HPD_H__ */ 320