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

INCLUDED FROM

DEFINITIONS

1. dc_get_link_at_index

   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_types.h"
  30 #include "grph_object_defs.h"
  31 
  32 #ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
  33 enum dc_link_fec_state {
  34         dc_link_fec_not_ready,
  35         dc_link_fec_ready,
  36         dc_link_fec_enabled
  37 };
  38 #endif
  39 struct dc_link_status {
  40         bool link_active;
  41         struct dpcd_caps *dpcd_caps;
  42 };
  43 
  44 /* DP MST stream allocation (payload bandwidth number) */
  45 struct link_mst_stream_allocation {
  46         /* DIG front */
  47         const struct stream_encoder *stream_enc;
  48         /* associate DRM payload table with DC stream encoder */
  49         uint8_t vcp_id;
  50         /* number of slots required for the DP stream in transport packet */
  51         uint8_t slot_count;
  52 };
  53 
  54 /* DP MST stream allocation table */
  55 struct link_mst_stream_allocation_table {
  56         /* number of DP video streams */
  57         int stream_count;
  58         /* array of stream allocations */
  59         struct link_mst_stream_allocation stream_allocations[MAX_CONTROLLER_NUM];
  60 };
  61 
  62 struct time_stamp {
  63         uint64_t edp_poweroff;
  64         uint64_t edp_poweron;
  65 };
  66 
  67 struct link_trace {
  68         struct time_stamp time_stamp;
  69 };
  70 /*
  71  * A link contains one or more sinks and their connected status.
  72  * The currently active signal type (HDMI, DP-SST, DP-MST) is also reported.
  73  */
  74 struct dc_link {
  75         struct dc_sink *remote_sinks[MAX_SINKS_PER_LINK];
  76         unsigned int sink_count;
  77         struct dc_sink *local_sink;
  78         unsigned int link_index;
  79         enum dc_connection_type type;
  80         enum signal_type connector_signal;
  81         enum dc_irq_source irq_source_hpd;
  82         enum dc_irq_source irq_source_hpd_rx;/* aka DP Short Pulse  */
  83         bool is_hpd_filter_disabled;
  84         bool dp_ss_off;
  85         bool link_state_valid;
  86         bool aux_access_disabled;
  87         bool sync_lt_in_progress;
  88 
  89         /* caps is the same as reported_link_cap. link_traing use
  90          * reported_link_cap. Will clean up.  TODO
  91          */
  92         struct dc_link_settings reported_link_cap;
  93         struct dc_link_settings verified_link_cap;
  94         struct dc_link_settings cur_link_settings;
  95         struct dc_lane_settings cur_lane_setting;
  96         struct dc_link_settings preferred_link_setting;
  97         struct dc_link_training_overrides preferred_training_settings;
  98 
  99         uint8_t ddc_hw_inst;
 100 
 101         uint8_t hpd_src;
 102 
 103         uint8_t link_enc_hw_inst;
 104 
 105         bool test_pattern_enabled;
 106         union compliance_test_state compliance_test_state;
 107 
 108         void *priv;
 109 
 110         struct ddc_service *ddc;
 111 
 112         bool aux_mode;
 113 
 114         /* Private to DC core */
 115 
 116         const struct dc *dc;
 117 
 118         struct dc_context *ctx;
 119 
 120         struct link_encoder *link_enc;
 121         struct graphics_object_id link_id;
 122         union ddi_channel_mapping ddi_channel_mapping;
 123         struct connector_device_tag_info device_tag;
 124         struct dpcd_caps dpcd_caps;
 125         uint32_t dongle_max_pix_clk;
 126         unsigned short chip_caps;
 127         unsigned int dpcd_sink_count;
 128         enum edp_revision edp_revision;
 129         bool psr_enabled;
 130 
 131         /* MST record stream using this link */
 132         struct link_flags {
 133                 bool dp_keep_receiver_powered;
 134                 bool dp_skip_DID2;
 135         } wa_flags;
 136         struct link_mst_stream_allocation_table mst_stream_alloc_table;
 137 
 138         struct dc_link_status link_status;
 139 
 140         struct link_trace link_trace;
 141         struct gpio *hpd_gpio;
 142 #ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
 143         enum dc_link_fec_state fec_state;
 144 #endif
 145 };
 146 
 147 const struct dc_link_status *dc_link_get_status(const struct dc_link *dc_link);
 148 
 149 /**
 150  * dc_get_link_at_index() - Return an enumerated dc_link.
 151  *
 152  * dc_link order is constant and determined at
 153  * boot time.  They cannot be created or destroyed.
 154  * Use dc_get_caps() to get number of links.
 155  */
 156 static inline struct dc_link *dc_get_link_at_index(struct dc *dc, uint32_t link_index)
 157 {
 158         return dc->links[link_index];
 159 }
 160 
 161 /* Set backlight level of an embedded panel (eDP, LVDS).
 162  * backlight_pwm_u16_16 is unsigned 32 bit with 16 bit integer
 163  * and 16 bit fractional, where 1.0 is max backlight value.
 164  */
 165 bool dc_link_set_backlight_level(const struct dc_link *dc_link,
 166                 uint32_t backlight_pwm_u16_16,
 167                 uint32_t frame_ramp);
 168 
 169 int dc_link_get_backlight_level(const struct dc_link *dc_link);
 170 
 171 bool dc_link_set_abm_disable(const struct dc_link *dc_link);
 172 
 173 bool dc_link_set_psr_enable(const struct dc_link *dc_link, bool enable, bool wait);
 174 
 175 bool dc_link_get_psr_state(const struct dc_link *dc_link, uint32_t *psr_state);
 176 
 177 bool dc_link_setup_psr(struct dc_link *dc_link,
 178                 const struct dc_stream_state *stream, struct psr_config *psr_config,
 179                 struct psr_context *psr_context);
 180 
 181 /* Request DC to detect if there is a Panel connected.
 182  * boot - If this call is during initial boot.
 183  * Return false for any type of detection failure or MST detection
 184  * true otherwise. True meaning further action is required (status update
 185  * and OS notification).
 186  */
 187 enum dc_detect_reason {
 188         DETECT_REASON_BOOT,
 189         DETECT_REASON_HPD,
 190         DETECT_REASON_HPDRX,
 191 };
 192 
 193 bool dc_link_detect(struct dc_link *dc_link, enum dc_detect_reason reason);
 194 bool dc_link_get_hpd_state(struct dc_link *dc_link);
 195 
 196 /* Notify DC about DP RX Interrupt (aka Short Pulse Interrupt).
 197  * Return:
 198  * true - Downstream port status changed. DM should call DC to do the
 199  * detection.
 200  * false - no change in Downstream port status. No further action required
 201  * from DM. */
 202 bool dc_link_handle_hpd_rx_irq(struct dc_link *dc_link,
 203                 union hpd_irq_data *hpd_irq_dpcd_data, bool *out_link_loss);
 204 
 205 struct dc_sink_init_data;
 206 
 207 struct dc_sink *dc_link_add_remote_sink(
 208                 struct dc_link *dc_link,
 209                 const uint8_t *edid,
 210                 int len,
 211                 struct dc_sink_init_data *init_data);
 212 
 213 void dc_link_remove_remote_sink(
 214         struct dc_link *link,
 215         struct dc_sink *sink);
 216 
 217 /* Used by diagnostics for virtual link at the moment */
 218 
 219 void dc_link_dp_set_drive_settings(
 220         struct dc_link *link,
 221         struct link_training_settings *lt_settings);
 222 
 223 bool dc_link_dp_perform_link_training_skip_aux(
 224         struct dc_link *link,
 225         const struct dc_link_settings *link_setting);
 226 
 227 enum link_training_result dc_link_dp_perform_link_training(
 228         struct dc_link *link,
 229         const struct dc_link_settings *link_setting,
 230         bool skip_video_pattern);
 231 
 232 bool dc_link_dp_sync_lt_begin(struct dc_link *link);
 233 
 234 enum link_training_result dc_link_dp_sync_lt_attempt(
 235         struct dc_link *link,
 236         struct dc_link_settings *link_setting,
 237         struct dc_link_training_overrides *lt_settings);
 238 
 239 bool dc_link_dp_sync_lt_end(struct dc_link *link, bool link_down);
 240 
 241 void dc_link_dp_enable_hpd(const struct dc_link *link);
 242 
 243 void dc_link_dp_disable_hpd(const struct dc_link *link);
 244 
 245 bool dc_link_dp_set_test_pattern(
 246         struct dc_link *link,
 247         enum dp_test_pattern test_pattern,
 248         const struct link_training_settings *p_link_settings,
 249         const unsigned char *p_custom_pattern,
 250         unsigned int cust_pattern_size);
 251 
 252 void dc_link_enable_hpd_filter(struct dc_link *link, bool enable);
 253 
 254 bool dc_link_is_dp_sink_present(struct dc_link *link);
 255 
 256 bool dc_link_detect_sink(struct dc_link *link, enum dc_connection_type *type);
 257 /*
 258  * DPCD access interfaces
 259  */
 260 
 261 void dc_link_set_drive_settings(struct dc *dc,
 262                                 struct link_training_settings *lt_settings,
 263                                 const struct dc_link *link);
 264 void dc_link_perform_link_training(struct dc *dc,
 265                                    struct dc_link_settings *link_setting,
 266                                    bool skip_video_pattern);
 267 void dc_link_set_preferred_link_settings(struct dc *dc,
 268                                          struct dc_link_settings *link_setting,
 269                                          struct dc_link *link);
 270 void dc_link_set_preferred_training_settings(struct dc *dc,
 271                                         struct dc_link_settings *link_setting,
 272                                         struct dc_link_training_overrides *lt_overrides,
 273                                         struct dc_link *link,
 274                                         bool skip_immediate_retrain);
 275 void dc_link_enable_hpd(const struct dc_link *link);
 276 void dc_link_disable_hpd(const struct dc_link *link);
 277 void dc_link_set_test_pattern(struct dc_link *link,
 278                         enum dp_test_pattern test_pattern,
 279                         const struct link_training_settings *p_link_settings,
 280                         const unsigned char *p_custom_pattern,
 281                         unsigned int cust_pattern_size);
 282 uint32_t dc_link_bandwidth_kbps(
 283         const struct dc_link *link,
 284         const struct dc_link_settings *link_setting);
 285 
 286 const struct dc_link_settings *dc_link_get_link_cap(
 287                 const struct dc_link *link);
 288 
 289 bool dc_submit_i2c(
 290                 struct dc *dc,
 291                 uint32_t link_index,
 292                 struct i2c_command *cmd);
 293 
 294 uint32_t dc_bandwidth_in_kbps_from_timing(
 295         const struct dc_crtc_timing *timing);
 296 #endif /* DC_LINK_H_ */