drivers/gpu/drm/amd/display/dc/dc_link.h

   1 /*
   2  * Copyright 2012-14 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 #include "dc.h"
  30 #include "dc_types.h"
  31 #include "grph_object_defs.h"
  32
  33 enum dc_link_fec_state {
  34         dc_link_fec_not_ready,
  35         dc_link_fec_ready,
  36         dc_link_fec_enabled
  37 };
  38 struct dc_link_status {
  39         bool link_active;
  40         struct dpcd_caps *dpcd_caps;
  41 };
  42
  43 /* DP MST stream allocation (payload bandwidth number) */
  44 struct link_mst_stream_allocation {
  45         /* DIG front */
  46         const struct stream_encoder *stream_enc;
  47         /* associate DRM payload table with DC stream encoder */
  48         uint8_t vcp_id;
  49         /* number of slots required for the DP stream in transport packet */
  50         uint8_t slot_count;
  51 };
  52
  53 /* DP MST stream allocation table */
  54 struct link_mst_stream_allocation_table {
  55         /* number of DP video streams */
  56         int stream_count;
  57         /* array of stream allocations */
  58         struct link_mst_stream_allocation stream_allocations[MAX_CONTROLLER_NUM];
  59 };
  60
  61 struct time_stamp {
  62         uint64_t edp_poweroff;
  63         uint64_t edp_poweron;
  64 };
  65
  66 struct link_trace {
  67         struct time_stamp time_stamp;
  68 };
  69
  70 /* PSR feature flags */
  71 struct psr_settings {
  72         bool psr_feature_enabled;               // PSR is supported by sink
  73         bool psr_allow_active;                  // PSR is currently active
  74         enum dc_psr_version psr_version;                // Internal PSR version, determined based on DPCD
  75
  76         /* These parameters are calculated in Driver,
  77          * based on display timing and Sink capabilities.
  78          * If VBLANK region is too small and Sink takes a long time
  79          * to set up RFB, it may take an extra frame to enter PSR state.
  80          */
  81         bool psr_frame_capture_indication_req;
  82         unsigned int psr_sdp_transmit_line_num_deadline;
  83 };
  84
  85 /*
  86  * A link contains one or more sinks and their connected status.
  87  * The currently active signal type (HDMI, DP-SST, DP-MST) is also reported.
  88  */
  89 struct dc_link {
  90         struct dc_sink *remote_sinks[MAX_SINKS_PER_LINK];
  91         unsigned int sink_count;
  92         struct dc_sink *local_sink;
  93         unsigned int link_index;
  94         enum dc_connection_type type;
  95         enum signal_type connector_signal;
  96         enum dc_irq_source irq_source_hpd;
  97         enum dc_irq_source irq_source_hpd_rx;/* aka DP Short Pulse  */
  98         bool is_hpd_filter_disabled;
  99         bool dp_ss_off;
 100         bool link_state_valid;
 101         bool aux_access_disabled;
 102         bool sync_lt_in_progress;
 103         bool lttpr_non_transparent_mode;
 104         bool is_internal_display;
 105
 106         /* caps is the same as reported_link_cap. link_traing use
 107          * reported_link_cap. Will clean up.  TODO
 108          */
 109         struct dc_link_settings reported_link_cap;
 110         struct dc_link_settings verified_link_cap;
 111         struct dc_link_settings cur_link_settings;
 112         struct dc_lane_settings cur_lane_setting;
 113         struct dc_link_settings preferred_link_setting;
 114         struct dc_link_training_overrides preferred_training_settings;
 115         struct dp_audio_test_data audio_test_data;
 116
 117         uint8_t ddc_hw_inst;
 118
 119         uint8_t hpd_src;
 120
 121         uint8_t link_enc_hw_inst;
 122
 123         bool test_pattern_enabled;
 124         union compliance_test_state compliance_test_state;
 125
 126         void *priv;
 127
 128         struct ddc_service *ddc;
 129
 130         bool aux_mode;
 131
 132         /* Private to DC core */
 133
 134         const struct dc *dc;
 135
 136         struct dc_context *ctx;
 137
 138         struct panel_cntl *panel_cntl;
 139         struct link_encoder *link_enc;
 140         struct graphics_object_id link_id;
 141         union ddi_channel_mapping ddi_channel_mapping;
 142         struct connector_device_tag_info device_tag;
 143         struct dpcd_caps dpcd_caps;
 144         uint32_t dongle_max_pix_clk;
 145         unsigned short chip_caps;
 146         unsigned int dpcd_sink_count;
 147 #if defined(CONFIG_DRM_AMD_DC_HDCP)
 148         struct hdcp_caps hdcp_caps;
 149 #endif
 150         enum edp_revision edp_revision;
 151         union dpcd_sink_ext_caps dpcd_sink_ext_caps;
 152
 153         struct psr_settings psr_settings;
 154
 155         /* MST record stream using this link */
 156         struct link_flags {
 157                 bool dp_keep_receiver_powered;
 158                 bool dp_skip_DID2;
 159                 bool dp_skip_reset_segment;
 160         } wa_flags;
 161         struct link_mst_stream_allocation_table mst_stream_alloc_table;
 162
 163         struct dc_link_status link_status;
 164
 165         struct link_trace link_trace;
 166         struct gpio *hpd_gpio;
 167         enum dc_link_fec_state fec_state;
 168 };
 169
 170 const struct dc_link_status *dc_link_get_status(const struct dc_link *dc_link);
 171
 172 /**
 173  * dc_get_link_at_index() - Return an enumerated dc_link.
 174  *
 175  * dc_link order is constant and determined at
 176  * boot time.  They cannot be created or destroyed.
 177  * Use dc_get_caps() to get number of links.
 178  */
 179 static inline struct dc_link *dc_get_link_at_index(struct dc *dc, uint32_t link_index)
 180 {
 181         return dc->links[link_index];
 182 }
 183
 184 static inline struct dc_link *get_edp_link(const struct dc *dc)
 185 {
 186         int i;
 187
 188         // report any eDP links, even unconnected DDI's
 189         for (i = 0; i < dc->link_count; i++) {
 190                 if (dc->links[i]->connector_signal == SIGNAL_TYPE_EDP)
 191                         return dc->links[i];
 192         }
 193         return NULL;
 194 }
 195
 196 /* Set backlight level of an embedded panel (eDP, LVDS).
 197  * backlight_pwm_u16_16 is unsigned 32 bit with 16 bit integer
 198  * and 16 bit fractional, where 1.0 is max backlight value.
 199  */
 200 bool dc_link_set_backlight_level(const struct dc_link *dc_link,
 201                 uint32_t backlight_pwm_u16_16,
 202                 uint32_t frame_ramp);
 203
 204 /* Set/get nits-based backlight level of an embedded panel (eDP, LVDS). */
 205 bool dc_link_set_backlight_level_nits(struct dc_link *link,
 206                 bool isHDR,
 207                 uint32_t backlight_millinits,
 208                 uint32_t transition_time_in_ms);
 209
 210 bool dc_link_get_backlight_level_nits(struct dc_link *link,
 211                 uint32_t *backlight_millinits,
 212                 uint32_t *backlight_millinits_peak);
 213
 214 bool dc_link_backlight_enable_aux(struct dc_link *link, bool enable);
 215
 216 bool dc_link_read_default_bl_aux(struct dc_link *link, uint32_t *backlight_millinits);
 217 bool dc_link_set_default_brightness_aux(struct dc_link *link);
 218
 219 int dc_link_get_backlight_level(const struct dc_link *dc_link);
 220
 221 int dc_link_get_target_backlight_pwm(const struct dc_link *link);
 222
 223 bool dc_link_set_psr_allow_active(struct dc_link *dc_link, bool enable,
 224                 bool wait, bool force_static);
 225
 226 bool dc_link_get_psr_state(const struct dc_link *dc_link, enum dc_psr_state *state);
 227
 228 bool dc_link_setup_psr(struct dc_link *dc_link,
 229                 const struct dc_stream_state *stream, struct psr_config *psr_config,
 230                 struct psr_context *psr_context);
 231
 232 void dc_link_get_psr_residency(const struct dc_link *link, uint32_t *residency);
 233
 234 /* Request DC to detect if there is a Panel connected.
 235  * boot - If this call is during initial boot.
 236  * Return false for any type of detection failure or MST detection
 237  * true otherwise. True meaning further action is required (status update
 238  * and OS notification).
 239  */
 240 enum dc_detect_reason {
 241         DETECT_REASON_BOOT,
 242         DETECT_REASON_HPD,
 243         DETECT_REASON_HPDRX,
 244         DETECT_REASON_FALLBACK,
 245         DETECT_REASON_RETRAIN
 246 };
 247
 248 bool dc_link_detect(struct dc_link *dc_link, enum dc_detect_reason reason);
 249 bool dc_link_get_hpd_state(struct dc_link *dc_link);
 250 enum dc_status dc_link_allocate_mst_payload(struct pipe_ctx *pipe_ctx);
 251 enum dc_status dc_link_reallocate_mst_payload(struct dc_link *link);
 252
 253 /* Notify DC about DP RX Interrupt (aka Short Pulse Interrupt).
 254  * Return:
 255  * true - Downstream port status changed. DM should call DC to do the
 256  * detection.
 257  * false - no change in Downstream port status. No further action required
 258  * from DM. */
 259 bool dc_link_handle_hpd_rx_irq(struct dc_link *dc_link,
 260                 union hpd_irq_data *hpd_irq_dpcd_data, bool *out_link_loss);
 261
 262 enum dc_status read_hpd_rx_irq_data(
 263         struct dc_link *link,
 264         union hpd_irq_data *irq_data);
 265
 266 struct dc_sink_init_data;
 267
 268 struct dc_sink *dc_link_add_remote_sink(
 269                 struct dc_link *dc_link,
 270                 const uint8_t *edid,
 271                 int len,
 272                 struct dc_sink_init_data *init_data);
 273
 274 void dc_link_remove_remote_sink(
 275         struct dc_link *link,
 276         struct dc_sink *sink);
 277
 278 /* Used by diagnostics for virtual link at the moment */
 279
 280 void dc_link_dp_set_drive_settings(
 281         struct dc_link *link,
 282         struct link_training_settings *lt_settings);
 283
 284 bool dc_link_dp_perform_link_training_skip_aux(
 285         struct dc_link *link,
 286         const struct dc_link_settings *link_setting);
 287
 288 enum link_training_result dc_link_dp_perform_link_training(
 289         struct dc_link *link,
 290         const struct dc_link_settings *link_setting,
 291         bool skip_video_pattern);
 292
 293 bool dc_link_dp_sync_lt_begin(struct dc_link *link);
 294
 295 enum link_training_result dc_link_dp_sync_lt_attempt(
 296         struct dc_link *link,
 297         struct dc_link_settings *link_setting,
 298         struct dc_link_training_overrides *lt_settings);
 299
 300 bool dc_link_dp_sync_lt_end(struct dc_link *link, bool link_down);
 301
 302 void dc_link_dp_enable_hpd(const struct dc_link *link);
 303
 304 void dc_link_dp_disable_hpd(const struct dc_link *link);
 305
 306 bool dc_link_dp_set_test_pattern(
 307         struct dc_link *link,
 308         enum dp_test_pattern test_pattern,
 309         enum dp_test_pattern_color_space test_pattern_color_space,
 310         const struct link_training_settings *p_link_settings,
 311         const unsigned char *p_custom_pattern,
 312         unsigned int cust_pattern_size);
 313
 314 void dc_link_enable_hpd_filter(struct dc_link *link, bool enable);
 315
 316 bool dc_link_is_dp_sink_present(struct dc_link *link);
 317
 318 bool dc_link_detect_sink(struct dc_link *link, enum dc_connection_type *type);
 319 /*
 320  * DPCD access interfaces
 321  */
 322
 323 #ifdef CONFIG_DRM_AMD_DC_HDCP
 324 bool dc_link_is_hdcp14(struct dc_link *link, enum signal_type signal);
 325 bool dc_link_is_hdcp22(struct dc_link *link, enum signal_type signal);
 326 #endif
 327 void dc_link_set_drive_settings(struct dc *dc,
 328                                 struct link_training_settings *lt_settings,
 329                                 const struct dc_link *link);
 330 void dc_link_perform_link_training(struct dc *dc,
 331                                    struct dc_link_settings *link_setting,
 332                                    bool skip_video_pattern);
 333 void dc_link_set_preferred_link_settings(struct dc *dc,
 334                                          struct dc_link_settings *link_setting,
 335                                          struct dc_link *link);
 336 void dc_link_set_preferred_training_settings(struct dc *dc,
 337                                         struct dc_link_settings *link_setting,
 338                                         struct dc_link_training_overrides *lt_overrides,
 339                                         struct dc_link *link,
 340                                         bool skip_immediate_retrain);
 341 void dc_link_enable_hpd(const struct dc_link *link);
 342 void dc_link_disable_hpd(const struct dc_link *link);
 343 void dc_link_set_test_pattern(struct dc_link *link,
 344                         enum dp_test_pattern test_pattern,
 345                         enum dp_test_pattern_color_space test_pattern_color_space,
 346                         const struct link_training_settings *p_link_settings,
 347                         const unsigned char *p_custom_pattern,
 348                         unsigned int cust_pattern_size);
 349 uint32_t dc_link_bandwidth_kbps(
 350         const struct dc_link *link,
 351         const struct dc_link_settings *link_setting);
 352
 353 const struct dc_link_settings *dc_link_get_link_cap(
 354                 const struct dc_link *link);
 355
 356 void dc_link_overwrite_extended_receiver_cap(
 357                 struct dc_link *link);
 358
 359 bool dc_submit_i2c(
 360                 struct dc *dc,
 361                 uint32_t link_index,
 362                 struct i2c_command *cmd);
 363
 364 bool dc_submit_i2c_oem(
 365                 struct dc *dc,
 366                 struct i2c_command *cmd);
 367
 368 uint32_t dc_bandwidth_in_kbps_from_timing(
 369         const struct dc_crtc_timing *timing);
 370
 371 bool dc_link_is_fec_supported(const struct dc_link *link);
 372
 373 #endif /* DC_LINK_H_ */