diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 862 |
1 files changed, 539 insertions, 323 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index 3ff3d9e90983..b8832bdde2bc 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -14,6 +14,7 @@ #include "dpcd_defs.h" #include "dc_dmub_srv.h" #include "dce/dmub_hw_lock_mgr.h" +#include "inc/link_enc_cfg.h" /*Travis*/ static const uint8_t DP_VGA_LVDS_CONVERTER_ID_2[] = "sivarT"; @@ -24,7 +25,7 @@ static const uint8_t DP_VGA_LVDS_CONVERTER_ID_3[] = "dnomlA"; link->ctx->logger #define DC_TRACE_LEVEL_MESSAGE(...) /* do nothing */ -#define DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE 0x50 +#include "link_dpcd.h" /* maximum pre emphasis level allowed for each voltage swing level*/ static const enum dc_pre_emphasis @@ -38,14 +39,6 @@ enum { POST_LT_ADJ_REQ_TIMEOUT = 200 }; -enum { - LINK_TRAINING_MAX_RETRY_COUNT = 5, - /* to avoid infinite loop where-in the receiver - * switches between different VS - */ - LINK_TRAINING_MAX_CR_RETRY = 100 -}; - static bool decide_fallback_link_setting( struct dc_link_settings initial_link_settings, struct dc_link_settings *current_link_setting, @@ -96,7 +89,7 @@ static uint32_t get_eq_training_aux_rd_interval( return wait_in_micro_secs; } -static void wait_for_training_aux_rd_interval( +void dp_wait_for_training_aux_rd_interval( struct dc_link *link, uint32_t wait_in_micro_secs) { @@ -107,10 +100,50 @@ static void wait_for_training_aux_rd_interval( wait_in_micro_secs); } +enum dpcd_training_patterns + dc_dp_training_pattern_to_dpcd_training_pattern( + struct dc_link *link, + enum dc_dp_training_pattern pattern) +{ + enum dpcd_training_patterns dpcd_tr_pattern = + DPCD_TRAINING_PATTERN_VIDEOIDLE; + + switch (pattern) { + case DP_TRAINING_PATTERN_SEQUENCE_1: + dpcd_tr_pattern = DPCD_TRAINING_PATTERN_1; + break; + case DP_TRAINING_PATTERN_SEQUENCE_2: + dpcd_tr_pattern = DPCD_TRAINING_PATTERN_2; + break; + case DP_TRAINING_PATTERN_SEQUENCE_3: + dpcd_tr_pattern = DPCD_TRAINING_PATTERN_3; + break; + case DP_TRAINING_PATTERN_SEQUENCE_4: + dpcd_tr_pattern = DPCD_TRAINING_PATTERN_4; + break; + case DP_TRAINING_PATTERN_VIDEOIDLE: + dpcd_tr_pattern = DPCD_TRAINING_PATTERN_VIDEOIDLE; + break; + default: + ASSERT(0); + DC_LOG_HW_LINK_TRAINING("%s: Invalid HW Training pattern: %d\n", + __func__, pattern); + break; + } + + return dpcd_tr_pattern; +} + static void dpcd_set_training_pattern( struct dc_link *link, - union dpcd_training_pattern dpcd_pattern) + enum dc_dp_training_pattern training_pattern) { + union dpcd_training_pattern dpcd_pattern = { {0} }; + + dpcd_pattern.v1_4.TRAINING_PATTERN_SET = + dc_dp_training_pattern_to_dpcd_training_pattern( + link, training_pattern); + core_link_write_dpcd( link, DP_TRAINING_PATTERN_SET, @@ -132,10 +165,22 @@ static enum dc_dp_training_pattern decide_cr_training_pattern( static enum dc_dp_training_pattern decide_eq_training_pattern(struct dc_link *link, const struct dc_link_settings *link_settings) { + struct link_encoder *link_enc; enum dc_dp_training_pattern highest_tp = DP_TRAINING_PATTERN_SEQUENCE_2; - struct encoder_feature_support *features = &link->link_enc->features; + struct encoder_feature_support *features; struct dpcd_caps *dpcd_caps = &link->dpcd_caps; + /* Access link encoder capability based on whether it is statically + * or dynamically assigned to a link. + */ + if (link->is_dig_mapping_flexible && + link->dc->res_pool->funcs->link_encs_assign) + link_enc = link_enc_cfg_get_link_enc_used_by_link(link->dc->current_state, link); + else + link_enc = link->link_enc; + ASSERT(link_enc); + features = &link_enc->features; + if (features->flags.bits.IS_TPS3_CAPABLE) highest_tp = DP_TRAINING_PATTERN_SEQUENCE_3; @@ -153,11 +198,12 @@ static enum dc_dp_training_pattern decide_eq_training_pattern(struct dc_link *li return DP_TRAINING_PATTERN_SEQUENCE_2; } -static void dpcd_set_link_settings( +enum dc_status dpcd_set_link_settings( struct dc_link *link, const struct link_training_settings *lt_settings) { uint8_t rate; + enum dc_status status; union down_spread_ctrl downspread = { {0} }; union lane_count_set lane_count_set = { {0} }; @@ -172,15 +218,16 @@ static void dpcd_set_link_settings( lane_count_set.bits.POST_LT_ADJ_REQ_GRANTED = 0; - if (lt_settings->pattern_for_eq < DP_TRAINING_PATTERN_SEQUENCE_4) { + if (link->ep_type == DISPLAY_ENDPOINT_PHY && + lt_settings->pattern_for_eq < DP_TRAINING_PATTERN_SEQUENCE_4) { lane_count_set.bits.POST_LT_ADJ_REQ_GRANTED = link->dpcd_caps.max_ln_count.bits.POST_LT_ADJ_REQ_SUPPORTED; } - core_link_write_dpcd(link, DP_DOWNSPREAD_CTRL, + status = core_link_write_dpcd(link, DP_DOWNSPREAD_CTRL, &downspread.raw, sizeof(downspread)); - core_link_write_dpcd(link, DP_LANE_COUNT_SET, + status = core_link_write_dpcd(link, DP_LANE_COUNT_SET, &lane_count_set.raw, 1); if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_14 && @@ -196,12 +243,12 @@ static void dpcd_set_link_settings( core_link_read_dpcd(link, DP_SUPPORTED_LINK_RATES, supported_link_rates, sizeof(supported_link_rates)); } - core_link_write_dpcd(link, DP_LINK_BW_SET, &rate, 1); - core_link_write_dpcd(link, DP_LINK_RATE_SET, + status = core_link_write_dpcd(link, DP_LINK_BW_SET, &rate, 1); + status = core_link_write_dpcd(link, DP_LINK_RATE_SET, <_settings->link_settings.link_rate_set, 1); } else { rate = (uint8_t) (lt_settings->link_settings.link_rate); - core_link_write_dpcd(link, DP_LINK_BW_SET, &rate, 1); + status = core_link_write_dpcd(link, DP_LINK_BW_SET, &rate, 1); } if (rate) { @@ -225,40 +272,11 @@ static void dpcd_set_link_settings( DP_DOWNSPREAD_CTRL, lt_settings->link_settings.link_spread); } -} -static enum dpcd_training_patterns - dc_dp_training_pattern_to_dpcd_training_pattern( - struct dc_link *link, - enum dc_dp_training_pattern pattern) -{ - enum dpcd_training_patterns dpcd_tr_pattern = - DPCD_TRAINING_PATTERN_VIDEOIDLE; - - switch (pattern) { - case DP_TRAINING_PATTERN_SEQUENCE_1: - dpcd_tr_pattern = DPCD_TRAINING_PATTERN_1; - break; - case DP_TRAINING_PATTERN_SEQUENCE_2: - dpcd_tr_pattern = DPCD_TRAINING_PATTERN_2; - break; - case DP_TRAINING_PATTERN_SEQUENCE_3: - dpcd_tr_pattern = DPCD_TRAINING_PATTERN_3; - break; - case DP_TRAINING_PATTERN_SEQUENCE_4: - dpcd_tr_pattern = DPCD_TRAINING_PATTERN_4; - break; - default: - ASSERT(0); - DC_LOG_HW_LINK_TRAINING("%s: Invalid HW Training pattern: %d\n", - __func__, pattern); - break; - } - - return dpcd_tr_pattern; + return status; } -static uint8_t dc_dp_initialize_scrambling_data_symbols( +uint8_t dc_dp_initialize_scrambling_data_symbols( struct dc_link *link, enum dc_dp_training_pattern pattern) { @@ -407,7 +425,7 @@ static void dpcd_set_lt_pattern_and_lane_settings( link->cur_lane_setting = lt_settings->lane_settings[0]; } -static bool is_cr_done(enum dc_lane_count ln_count, +bool dp_is_cr_done(enum dc_lane_count ln_count, union lane_status *dpcd_lane_status) { uint32_t lane; @@ -419,24 +437,34 @@ static bool is_cr_done(enum dc_lane_count ln_count, return true; } -static bool is_ch_eq_done(enum dc_lane_count ln_count, - union lane_status *dpcd_lane_status, - union lane_align_status_updated *lane_status_updated) +bool dp_is_ch_eq_done(enum dc_lane_count ln_count, + union lane_status *dpcd_lane_status) { + bool done = true; uint32_t lane; - if (!lane_status_updated->bits.INTERLANE_ALIGN_DONE) - return false; - else { - for (lane = 0; lane < (uint32_t)(ln_count); lane++) { - if (!dpcd_lane_status[lane].bits.SYMBOL_LOCKED_0 || - !dpcd_lane_status[lane].bits.CHANNEL_EQ_DONE_0) - return false; - } - } - return true; + for (lane = 0; lane < (uint32_t)(ln_count); lane++) + if (!dpcd_lane_status[lane].bits.CHANNEL_EQ_DONE_0) + done = false; + return done; } -static void update_drive_settings( +bool dp_is_symbol_locked(enum dc_lane_count ln_count, + union lane_status *dpcd_lane_status) +{ + bool locked = true; + uint32_t lane; + for (lane = 0; lane < (uint32_t)(ln_count); lane++) + if (!dpcd_lane_status[lane].bits.SYMBOL_LOCKED_0) + locked = false; + return locked; +} + +bool dp_is_interlane_aligned(union lane_align_status_updated align_status) +{ + return align_status.bits.INTERLANE_ALIGN_DONE == 1; +} + +void dp_update_drive_settings( struct link_training_settings *dest, struct link_training_settings src) { @@ -580,7 +608,7 @@ static void find_max_drive_settings( } -static void get_lane_status_and_drive_settings( +enum dc_status dp_get_lane_status_and_drive_settings( struct dc_link *link, const struct link_training_settings *link_training_setting, union lane_status *ln_status, @@ -595,6 +623,7 @@ static void get_lane_status_and_drive_settings( union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = { { {0} } }; struct link_training_settings request_settings = { {0} }; uint32_t lane; + enum dc_status status; memset(req_settings, '\0', sizeof(struct link_training_settings)); @@ -605,7 +634,7 @@ static void get_lane_status_and_drive_settings( lane_adjust_offset = 3; } - core_link_read_dpcd( + status = core_link_read_dpcd( link, lane01_status_address, (uint8_t *)(dpcd_buf), @@ -693,9 +722,10 @@ static void get_lane_status_and_drive_settings( * read DpcdAddress_AdjustRequestPostCursor2 = 0x020C */ + return status; } -static void dpcd_set_lane_settings( +enum dc_status dpcd_set_lane_settings( struct dc_link *link, const struct link_training_settings *link_training_setting, uint32_t offset) @@ -703,6 +733,7 @@ static void dpcd_set_lane_settings( union dpcd_training_lane dpcd_lane[LANE_COUNT_DP_MAX] = {{{0}}}; uint32_t lane; unsigned int lane0_set_address; + enum dc_status status; lane0_set_address = DP_TRAINING_LANE0_SET; @@ -730,7 +761,7 @@ static void dpcd_set_lane_settings( PRE_EMPHASIS_MAX_LEVEL ? 1 : 0); } - core_link_write_dpcd(link, + status = core_link_write_dpcd(link, lane0_set_address, (uint8_t *)(dpcd_lane), link_training_setting->link_settings.lane_count); @@ -776,9 +807,10 @@ static void dpcd_set_lane_settings( } link->cur_lane_setting = link_training_setting->lane_settings[0]; + return status; } -static bool is_max_vs_reached( +bool dp_is_max_vs_reached( const struct link_training_settings *lt_settings) { uint32_t lane; @@ -820,25 +852,24 @@ static bool perform_post_lt_adj_req_sequence( union lane_align_status_updated dpcd_lane_status_updated; - get_lane_status_and_drive_settings( - link, - lt_settings, - dpcd_lane_status, - &dpcd_lane_status_updated, - &req_settings, - DPRX); + dp_get_lane_status_and_drive_settings( + link, + lt_settings, + dpcd_lane_status, + &dpcd_lane_status_updated, + &req_settings, + DPRX); if (dpcd_lane_status_updated.bits. POST_LT_ADJ_REQ_IN_PROGRESS == 0) return true; - if (!is_cr_done(lane_count, dpcd_lane_status)) + if (!dp_is_cr_done(lane_count, dpcd_lane_status)) return false; - if (!is_ch_eq_done( - lane_count, - dpcd_lane_status, - &dpcd_lane_status_updated)) + if (!dp_is_ch_eq_done(lane_count, dpcd_lane_status) || + !dp_is_symbol_locked(lane_count, dpcd_lane_status) || + !dp_is_interlane_aligned(dpcd_lane_status_updated)) return false; for (lane = 0; lane < (uint32_t)(lane_count); lane++) { @@ -856,7 +887,7 @@ static bool perform_post_lt_adj_req_sequence( } if (req_drv_setting_changed) { - update_drive_settings( + dp_update_drive_settings( lt_settings, req_settings); dc_link_dp_set_drive_settings(link, @@ -884,7 +915,7 @@ static bool perform_post_lt_adj_req_sequence( } /* Only used for channel equalization */ -static uint32_t translate_training_aux_read_interval(uint32_t dpcd_aux_read_interval) +uint32_t dp_translate_training_aux_read_interval(uint32_t dpcd_aux_read_interval) { unsigned int aux_rd_interval_us = 400; @@ -908,7 +939,7 @@ static uint32_t translate_training_aux_read_interval(uint32_t dpcd_aux_read_inte return aux_rd_interval_us; } -static enum link_training_result get_cr_failure(enum dc_lane_count ln_count, +enum link_training_result dp_get_cr_failure(enum dc_lane_count ln_count, union lane_status *dpcd_lane_status) { enum link_training_result result = LINK_TRAINING_SUCCESS; @@ -969,17 +1000,17 @@ static enum link_training_result perform_channel_equalization_sequence( if (is_repeater(link, offset)) wait_time_microsec = - translate_training_aux_read_interval( + dp_translate_training_aux_read_interval( link->dpcd_caps.lttpr_caps.aux_rd_interval[offset - 1]); - wait_for_training_aux_rd_interval( + dp_wait_for_training_aux_rd_interval( link, wait_time_microsec); /* 4. Read lane status and requested * drive settings as set by the sink*/ - get_lane_status_and_drive_settings( + dp_get_lane_status_and_drive_settings( link, lt_settings, dpcd_lane_status, @@ -988,23 +1019,22 @@ static enum link_training_result perform_channel_equalization_sequence( offset); /* 5. check CR done*/ - if (!is_cr_done(lane_count, dpcd_lane_status)) + if (!dp_is_cr_done(lane_count, dpcd_lane_status)) return LINK_TRAINING_EQ_FAIL_CR; /* 6. check CHEQ done*/ - if (is_ch_eq_done(lane_count, - dpcd_lane_status, - &dpcd_lane_status_updated)) + if (dp_is_ch_eq_done(lane_count, dpcd_lane_status) && + dp_is_symbol_locked(lane_count, dpcd_lane_status) && + dp_is_interlane_aligned(dpcd_lane_status_updated)) return LINK_TRAINING_SUCCESS; /* 7. update VS/PE/PC2 in lt_settings*/ - update_drive_settings(lt_settings, req_settings); + dp_update_drive_settings(lt_settings, req_settings); } return LINK_TRAINING_EQ_FAIL_EQ; } -#define TRAINING_AUX_RD_INTERVAL 100 //us static void start_clock_recovery_pattern_early(struct dc_link *link, struct link_training_settings *lt_settings, @@ -1075,14 +1105,14 @@ static enum link_training_result perform_clock_recovery_sequence( if (link->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) wait_time_microsec = TRAINING_AUX_RD_INTERVAL; - wait_for_training_aux_rd_interval( + dp_wait_for_training_aux_rd_interval( link, wait_time_microsec); /* 4. Read lane status and requested drive * settings as set by the sink */ - get_lane_status_and_drive_settings( + dp_get_lane_status_and_drive_settings( link, lt_settings, dpcd_lane_status, @@ -1091,11 +1121,11 @@ static enum link_training_result perform_clock_recovery_sequence( offset); /* 5. check CR done*/ - if (is_cr_done(lane_count, dpcd_lane_status)) + if (dp_is_cr_done(lane_count, dpcd_lane_status)) return LINK_TRAINING_SUCCESS; /* 6. max VS reached*/ - if (is_max_vs_reached(lt_settings)) + if (dp_is_max_vs_reached(lt_settings)) break; /* 7. same lane settings*/ @@ -1110,7 +1140,7 @@ static enum link_training_result perform_clock_recovery_sequence( retries_cr = 0; /* 8. update VS/PE/PC2 in lt_settings*/ - update_drive_settings(lt_settings, req_settings); + dp_update_drive_settings(lt_settings, req_settings); retry_count++; } @@ -1123,10 +1153,10 @@ static enum link_training_result perform_clock_recovery_sequence( } - return get_cr_failure(lane_count, dpcd_lane_status); + return dp_get_cr_failure(lane_count, dpcd_lane_status); } -static inline enum link_training_result perform_link_training_int( +static inline enum link_training_result dp_transition_to_video_idle( struct dc_link *link, struct link_training_settings *lt_settings, enum link_training_result status) @@ -1142,8 +1172,16 @@ static inline enum link_training_result perform_link_training_int( * TPS4 must be used instead of POST_LT_ADJ_REQ. */ if (link->dpcd_caps.max_ln_count.bits.POST_LT_ADJ_REQ_SUPPORTED != 1 || - lt_settings->pattern_for_eq == DP_TRAINING_PATTERN_SEQUENCE_4) + lt_settings->pattern_for_eq == DP_TRAINING_PATTERN_SEQUENCE_4) { + /* delay 5ms after Main Link output idle pattern and then check + * DPCD 0202h. + */ + if (link->connector_signal != SIGNAL_TYPE_EDP && status == LINK_TRAINING_SUCCESS) { + msleep(5); + status = dp_check_link_loss_status(link, lt_settings); + } return status; + } if (status == LINK_TRAINING_SUCCESS && perform_post_lt_adj_req_sequence(link, lt_settings) == false) @@ -1162,7 +1200,7 @@ static inline enum link_training_result perform_link_training_int( return status; } -static enum link_training_result check_link_loss_status( +enum link_training_result dp_check_link_loss_status( struct dc_link *link, const struct link_training_settings *link_training_setting) { @@ -1200,7 +1238,7 @@ static enum link_training_result check_link_loss_status( return status; } -static void initialize_training_settings( +static inline void decide_8b_10b_training_settings( struct dc_link *link, const struct dc_link_settings *link_setting, const struct dc_link_training_overrides *overrides, @@ -1244,6 +1282,8 @@ static void initialize_training_settings( else lt_settings->link_settings.link_spread = LINK_SPREAD_05_DOWNSPREAD_30KHZ; + lt_settings->lttpr_mode = link->lttpr_mode; + /* Initialize lane settings overrides */ if (overrides->voltage_swing != NULL) lt_settings->voltage_swing = overrides->voltage_swing; @@ -1294,9 +1334,25 @@ static void initialize_training_settings( lt_settings->enhanced_framing = *overrides->enhanced_framing; else lt_settings->enhanced_framing = 1; + + if (link->preferred_training_settings.fec_enable != NULL) + lt_settings->should_set_fec_ready = *link->preferred_training_settings.fec_enable; + else + lt_settings->should_set_fec_ready = true; } -static uint8_t convert_to_count(uint8_t lttpr_repeater_count) +void dp_decide_training_settings( + struct dc_link *link, + const struct dc_link_settings *link_settings, + const struct dc_link_training_overrides *overrides, + struct link_training_settings *lt_settings) +{ + if (dp_get_link_encoding_format(link_settings) == DP_8b_10b_ENCODING) + decide_8b_10b_training_settings(link, link_settings, overrides, lt_settings); +} + + +uint8_t dp_convert_to_count(uint8_t lttpr_repeater_count) { switch (lttpr_repeater_count) { case 0x80: // 1 lttpr repeater @@ -1321,17 +1377,20 @@ static uint8_t convert_to_count(uint8_t lttpr_repeater_count) return 0; // invalid value } -static void configure_lttpr_mode_transparent(struct dc_link *link) +enum dc_status configure_lttpr_mode_transparent(struct dc_link *link) { uint8_t repeater_mode = DP_PHY_REPEATER_MODE_TRANSPARENT; - core_link_write_dpcd(link, + DC_LOG_HW_LINK_TRAINING("%s\n Set LTTPR to Transparent Mode\n", __func__); + return core_link_write_dpcd(link, DP_PHY_REPEATER_MODE, (uint8_t *)&repeater_mode, sizeof(repeater_mode)); } -static void configure_lttpr_mode_non_transparent(struct dc_link *link) +enum dc_status configure_lttpr_mode_non_transparent( + struct dc_link *link, + const struct link_training_settings *lt_settings) { /* aux timeout is already set to extended */ /* RESET/SET lttpr mode to enable non transparent mode */ @@ -1341,11 +1400,16 @@ static void configure_lttpr_mode_non_transparent(struct dc_link *link) enum dc_status result = DC_ERROR_UNEXPECTED; uint8_t repeater_mode = DP_PHY_REPEATER_MODE_TRANSPARENT; - DC_LOG_HW_LINK_TRAINING("%s\n Set LTTPR to Transparent Mode\n", __func__); - result = core_link_write_dpcd(link, - DP_PHY_REPEATER_MODE, - (uint8_t *)&repeater_mode, - sizeof(repeater_mode)); + enum dp_link_encoding encoding = dp_get_link_encoding_format(<_settings->link_settings); + + if (encoding == DP_8b_10b_ENCODING) { + DC_LOG_HW_LINK_TRAINING("%s\n Set LTTPR to Transparent Mode\n", __func__); + result = core_link_write_dpcd(link, + DP_PHY_REPEATER_MODE, + (uint8_t *)&repeater_mode, + sizeof(repeater_mode)); + + } if (result == DC_OK) { link->dpcd_caps.lttpr_caps.mode = repeater_mode; @@ -1365,18 +1429,22 @@ static void configure_lttpr_mode_non_transparent(struct dc_link *link) link->dpcd_caps.lttpr_caps.mode = repeater_mode; } - repeater_cnt = convert_to_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt); - for (repeater_id = repeater_cnt; repeater_id > 0; repeater_id--) { - aux_interval_address = DP_TRAINING_AUX_RD_INTERVAL_PHY_REPEATER1 + - ((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (repeater_id - 1)); - core_link_read_dpcd( - link, - aux_interval_address, - (uint8_t *)&link->dpcd_caps.lttpr_caps.aux_rd_interval[repeater_id - 1], - sizeof(link->dpcd_caps.lttpr_caps.aux_rd_interval[repeater_id - 1])); - link->dpcd_caps.lttpr_caps.aux_rd_interval[repeater_id - 1] &= 0x7F; + if (encoding == DP_8b_10b_ENCODING) { + repeater_cnt = dp_convert_to_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt); + for (repeater_id = repeater_cnt; repeater_id > 0; repeater_id--) { + aux_interval_address = DP_TRAINING_AUX_RD_INTERVAL_PHY_REPEATER1 + + ((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (repeater_id - 1)); + core_link_read_dpcd( + link, + aux_interval_address, + (uint8_t *)&link->dpcd_caps.lttpr_caps.aux_rd_interval[repeater_id - 1], + sizeof(link->dpcd_caps.lttpr_caps.aux_rd_interval[repeater_id - 1])); + link->dpcd_caps.lttpr_caps.aux_rd_interval[repeater_id - 1] &= 0x7F; + } } } + + return result; } static void repeater_training_done(struct dc_link *link, uint32_t offset) @@ -1510,7 +1578,7 @@ bool dc_link_dp_perform_link_training_skip_aux( { struct link_training_settings lt_settings; - initialize_training_settings( + dp_decide_training_settings( link, link_setting, &link->preferred_training_settings, @@ -1525,7 +1593,7 @@ bool dc_link_dp_perform_link_training_skip_aux( dp_set_hw_lane_settings(link, <_settings, DPRX); /* wait receiver to lock-on*/ - wait_for_training_aux_rd_interval(link, lt_settings.cr_pattern_time); + dp_wait_for_training_aux_rd_interval(link, lt_settings.cr_pattern_time); /* 2. Perform_channel_equalization_sequence. */ @@ -1536,7 +1604,7 @@ bool dc_link_dp_perform_link_training_skip_aux( dp_set_hw_lane_settings(link, <_settings, DPRX); /* wait receiver to lock-on. */ - wait_for_training_aux_rd_interval(link, lt_settings.eq_pattern_time); + dp_wait_for_training_aux_rd_interval(link, lt_settings.eq_pattern_time); /* 3. Perform_link_training_int. */ @@ -1548,60 +1616,78 @@ bool dc_link_dp_perform_link_training_skip_aux( return true; } -enum link_training_result dc_link_dp_perform_link_training( - struct dc_link *link, - const struct dc_link_settings *link_setting, - bool skip_video_pattern) +enum dc_status dpcd_configure_lttpr_mode(struct dc_link *link, struct link_training_settings *lt_settings) { - enum link_training_result status = LINK_TRAINING_SUCCESS; - struct link_training_settings lt_settings; - union dpcd_training_pattern dpcd_pattern = { { 0 } }; + enum dc_status status = DC_OK; - bool fec_enable; - uint8_t repeater_cnt; - uint8_t repeater_id; + if (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) + status = configure_lttpr_mode_non_transparent(link, lt_settings); + else + status = configure_lttpr_mode_transparent(link); + + return status; +} + +static void dpcd_exit_training_mode(struct dc_link *link) +{ + + /* clear training pattern set */ + dpcd_set_training_pattern(link, DP_TRAINING_PATTERN_VIDEOIDLE); +} - initialize_training_settings( +enum dc_status dpcd_configure_channel_coding(struct dc_link *link, + struct link_training_settings *lt_settings) +{ + enum dp_link_encoding encoding = + dp_get_link_encoding_format( + <_settings->link_settings); + enum dc_status status; + + status = core_link_write_dpcd( link, - link_setting, - &link->preferred_training_settings, - <_settings); + DP_MAIN_LINK_CHANNEL_CODING_SET, + (uint8_t *) &encoding, + 1); + DC_LOG_HW_LINK_TRAINING("%s:\n 0x%X MAIN_LINK_CHANNEL_CODING_SET = %x\n", + __func__, + DP_MAIN_LINK_CHANNEL_CODING_SET, + encoding); - /* Configure lttpr mode */ - if (link->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) - configure_lttpr_mode_non_transparent(link); - else if (link->lttpr_mode == LTTPR_MODE_TRANSPARENT) - configure_lttpr_mode_transparent(link); + return status; +} - if (link->ctx->dc->work_arounds.lt_early_cr_pattern) - start_clock_recovery_pattern_early(link, <_settings, DPRX); +static enum link_training_result dp_perform_8b_10b_link_training( + struct dc_link *link, + struct link_training_settings *lt_settings) +{ + enum link_training_result status = LINK_TRAINING_SUCCESS; - /* 1. set link rate, lane count and spread. */ - dpcd_set_link_settings(link, <_settings); + uint8_t repeater_cnt; + uint8_t repeater_id; + uint8_t lane = 0; - if (link->preferred_training_settings.fec_enable != NULL) - fec_enable = *link->preferred_training_settings.fec_enable; - else - fec_enable = true; + if (link->ctx->dc->work_arounds.lt_early_cr_pattern) + start_clock_recovery_pattern_early(link, lt_settings, DPRX); - dp_set_fec_ready(link, fec_enable); + /* 1. set link rate, lane count and spread. */ + dpcd_set_link_settings(link, lt_settings); if (link->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) { /* 2. perform link training (set link training done * to false is done as well) */ - repeater_cnt = convert_to_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt); + repeater_cnt = dp_convert_to_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt); for (repeater_id = repeater_cnt; (repeater_id > 0 && status == LINK_TRAINING_SUCCESS); repeater_id--) { - status = perform_clock_recovery_sequence(link, <_settings, repeater_id); + status = perform_clock_recovery_sequence(link, lt_settings, repeater_id); if (status != LINK_TRAINING_SUCCESS) break; status = perform_channel_equalization_sequence(link, - <_settings, + lt_settings, repeater_id); if (status != LINK_TRAINING_SUCCESS) @@ -1609,77 +1695,69 @@ enum link_training_result dc_link_dp_perform_link_training( repeater_training_done(link, repeater_id); } + + for (lane = 0; lane < (uint8_t)lt_settings->link_settings.lane_count; lane++) + lt_settings->lane_settings[lane].VOLTAGE_SWING = VOLTAGE_SWING_LEVEL0; } if (status == LINK_TRAINING_SUCCESS) { - status = perform_clock_recovery_sequence(link, <_settings, DPRX); + status = perform_clock_recovery_sequence(link, lt_settings, DPRX); if (status == LINK_TRAINING_SUCCESS) { status = perform_channel_equalization_sequence(link, - <_settings, + lt_settings, DPRX); } } - /* 3. set training not in progress*/ - dpcd_pattern.v1_4.TRAINING_PATTERN_SET = DPCD_TRAINING_PATTERN_VIDEOIDLE; - dpcd_set_training_pattern(link, dpcd_pattern); - if ((status == LINK_TRAINING_SUCCESS) || !skip_video_pattern) { - status = perform_link_training_int(link, - <_settings, - status); - } - - /* delay 5ms after Main Link output idle pattern and then check - * DPCD 0202h. - */ - if (link->connector_signal != SIGNAL_TYPE_EDP && status == LINK_TRAINING_SUCCESS) { - msleep(5); - status = check_link_loss_status(link, <_settings); - } - - /* 6. print status message*/ - print_status_message(link, <_settings, status); - - if (status != LINK_TRAINING_SUCCESS) - link->ctx->dc->debug_data.ltFailCount++; - return status; } -static enum dp_panel_mode try_enable_assr(struct dc_stream_state *stream) +enum link_training_result dc_link_dp_perform_link_training( + struct dc_link *link, + const struct dc_link_settings *link_settings, + bool skip_video_pattern) { - struct dc_link *link = stream->link; - enum dp_panel_mode panel_mode = dp_get_panel_mode(link); -#ifdef CONFIG_DRM_AMD_DC_HDCP - struct cp_psp *cp_psp = &stream->ctx->cp_psp; -#endif + enum link_training_result status = LINK_TRAINING_SUCCESS; + struct link_training_settings lt_settings; + enum dp_link_encoding encoding = + dp_get_link_encoding_format(link_settings); - /* ASSR must be supported on the panel */ - if (panel_mode == DP_PANEL_MODE_DEFAULT) - return panel_mode; + /* decide training settings */ + dp_decide_training_settings( + link, + link_settings, + &link->preferred_training_settings, + <_settings); - /* eDP or internal DP only */ - if (link->connector_signal != SIGNAL_TYPE_EDP && - !(link->connector_signal == SIGNAL_TYPE_DISPLAY_PORT && - link->is_internal_display)) - return DP_PANEL_MODE_DEFAULT; + /* reset previous training states */ + dpcd_exit_training_mode(link); -#ifdef CONFIG_DRM_AMD_DC_HDCP - if (cp_psp && cp_psp->funcs.enable_assr) { - if (!cp_psp->funcs.enable_assr(cp_psp->handle, link)) { - /* since eDP implies ASSR on, change panel - * mode to disable ASSR - */ - panel_mode = DP_PANEL_MODE_DEFAULT; - } - } else - panel_mode = DP_PANEL_MODE_DEFAULT; + /* configure link prior to entering training mode */ + dpcd_configure_lttpr_mode(link, <_settings); + dp_set_fec_ready(link, lt_settings.should_set_fec_ready); + dpcd_configure_channel_coding(link, <_settings); -#else - /* turn off ASSR if the implementation is not compiled in */ - panel_mode = DP_PANEL_MODE_DEFAULT; -#endif - return panel_mode; + /* enter training mode: + * Per DP specs starting from here, DPTX device shall not issue + * Non-LT AUX transactions inside training mode. + */ + if (encoding == DP_8b_10b_ENCODING) + status = dp_perform_8b_10b_link_training(link, <_settings); + else + ASSERT(0); + + /* exit training mode and switch to video idle */ + dpcd_exit_training_mode(link); + if ((status == LINK_TRAINING_SUCCESS) || !skip_video_pattern) + status = dp_transition_to_video_idle(link, + <_settings, + status); + + /* dump debug data */ + print_status_message(link, <_settings, status); + if (status != LINK_TRAINING_SUCCESS) + link->ctx->dc->debug_data.ltFailCount++; + return status; } bool perform_link_training_with_retries( @@ -1687,18 +1765,31 @@ bool perform_link_training_with_retries( bool skip_video_pattern, int attempts, struct pipe_ctx *pipe_ctx, - enum signal_type signal) + enum signal_type signal, + bool do_fallback) { - uint8_t j; + int j; uint8_t delay_between_attempts = LINK_TRAINING_RETRY_DELAY; struct dc_stream_state *stream = pipe_ctx->stream; struct dc_link *link = stream->link; - enum dp_panel_mode panel_mode; + enum dp_panel_mode panel_mode = dp_get_panel_mode(link); + struct link_encoder *link_enc; + enum link_training_result status = LINK_TRAINING_CR_FAIL_LANE0; + struct dc_link_settings current_setting = *link_setting; + + /* Dynamically assigned link encoders associated with stream rather than + * link. + */ + if (link->dc->res_pool->funcs->link_encs_assign) + link_enc = stream->link_enc; + else + link_enc = link->link_enc; + ASSERT(link_enc); /* We need to do this before the link training to ensure the idle pattern in SST * mode will be sent right after the link training */ - link->link_enc->funcs->connect_dig_be_to_fe(link->link_enc, + link_enc->funcs->connect_dig_be_to_fe(link_enc, pipe_ctx->stream_res.stream_enc->id, true); for (j = 0; j < attempts; ++j) { @@ -1710,7 +1801,7 @@ bool perform_link_training_with_retries( link, signal, pipe_ctx->clock_source->id, - link_setting); + ¤t_setting); if (stream->sink_patches.dppowerup_delay > 0) { int delay_dp_power_up_in_ms = stream->sink_patches.dppowerup_delay; @@ -1718,21 +1809,31 @@ bool perform_link_training_with_retries( msleep(delay_dp_power_up_in_ms); } - panel_mode = try_enable_assr(stream); +#ifdef CONFIG_DRM_AMD_DC_HDCP + if (panel_mode == DP_PANEL_MODE_EDP) { + struct cp_psp *cp_psp = &stream->ctx->cp_psp; + + if (cp_psp && cp_psp->funcs.enable_assr) { + if (!cp_psp->funcs.enable_assr(cp_psp->handle, link)) { + /* since eDP implies ASSR on, change panel + * mode to disable ASSR + */ + panel_mode = DP_PANEL_MODE_DEFAULT; + } + } else + panel_mode = DP_PANEL_MODE_DEFAULT; + } +#endif + dp_set_panel_mode(link, panel_mode); - DC_LOG_DETECTION_DP_CAPS("Link: %d ASSR enabled: %d\n", - link->link_index, - panel_mode != DP_PANEL_MODE_DEFAULT); if (link->aux_access_disabled) { - dc_link_dp_perform_link_training_skip_aux(link, link_setting); + dc_link_dp_perform_link_training_skip_aux(link, ¤t_setting); return true; } else { - enum link_training_result status = LINK_TRAINING_CR_FAIL_LANE0; - status = dc_link_dp_perform_link_training( link, - link_setting, + ¤t_setting, skip_video_pattern); if (status == LINK_TRAINING_SUCCESS) return true; @@ -1740,7 +1841,7 @@ bool perform_link_training_with_retries( /* latest link training still fail, skip delay and keep PHY on */ - if (j == (attempts - 1)) + if (j == (attempts - 1) && link->ep_type == DISPLAY_ENDPOINT_PHY) break; DC_LOG_WARNING("%s: Link training attempt %u of %d failed\n", @@ -1748,6 +1849,19 @@ bool perform_link_training_with_retries( dp_disable_link_phy(link, signal); + /* Abort link training if failure due to sink being unplugged. */ + if (status == LINK_TRAINING_ABORT) + break; + else if (do_fallback) { + decide_fallback_link_setting(*link_setting, ¤t_setting, status); + /* Fail link training if reduced link bandwidth no longer meets + * stream requirements. + */ + if (dc_bandwidth_in_kbps_from_timing(&stream->timing) < + dc_link_bandwidth_kbps(link, ¤t_setting)) + break; + } + msleep(delay_between_attempts); delay_between_attempts += LINK_TRAINING_RETRY_DELAY; @@ -1784,6 +1898,8 @@ static void set_dp_mst_mode(struct dc_link *link, bool mst_enable) link->type = dc_connection_single; link->local_sink = link->remote_sinks[0]; link->local_sink->sink_signal = SIGNAL_TYPE_DISPLAY_PORT; + dc_sink_retain(link->local_sink); + dm_helpers_dp_mst_stop_top_mgr(link->ctx, link); } else if (mst_enable == true && link->type == dc_connection_single && link->remote_sinks[0] != NULL) { @@ -1823,7 +1939,7 @@ enum link_training_result dc_link_dp_sync_lt_attempt( enum clock_source_id dp_cs_id = CLOCK_SOURCE_ID_EXTERNAL; bool fec_enable = false; - initialize_training_settings( + dp_decide_training_settings( link, link_settings, lt_overrides, @@ -1893,6 +2009,24 @@ bool dc_link_dp_sync_lt_end(struct dc_link *link, bool link_down) return true; } +bool dc_link_dp_get_max_link_enc_cap(const struct dc_link *link, struct dc_link_settings *max_link_enc_cap) +{ + if (!max_link_enc_cap) { + DC_LOG_ERROR("%s: Could not return max link encoder caps", __func__); + return false; + } + + if (link->link_enc->funcs->get_max_link_cap) { + link->link_enc->funcs->get_max_link_cap(link->link_enc, max_link_enc_cap); + return true; + } + + DC_LOG_ERROR("%s: Max link encoder caps unknown", __func__); + max_link_enc_cap->lane_count = 1; + max_link_enc_cap->link_rate = 6; + return false; +} + static struct dc_link_settings get_max_link_cap(struct dc_link *link) { struct dc_link_settings max_link_cap = {0}; @@ -1976,7 +2110,7 @@ enum dc_status read_hpd_rx_irq_data( return retval; } -static bool hpd_rx_irq_check_link_loss_status( +bool hpd_rx_irq_check_link_loss_status( struct dc_link *link, union hpd_irq_data *hpd_irq_dpcd_data) { @@ -2173,7 +2307,7 @@ bool dp_verify_link_cap_with_retries( struct dc_link_settings *known_limit_link_setting, int attempts) { - uint8_t i = 0; + int i = 0; bool success = false; for (i = 0; i < attempts; i++) { @@ -2411,6 +2545,12 @@ bool dp_validate_mode_timing( const struct dc_link_settings *link_setting; + /* According to spec, VSC SDP should be used if pixel format is YCbCr420 */ + if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR420 && + !link->dpcd_caps.dprx_feature.bits.VSC_SDP_COLORIMETRY_SUPPORTED && + dal_graphics_object_id_get_connector_id(link->link_id) != CONNECTOR_ID_VIRTUAL) + return false; + /*always DP fail safe mode*/ if ((timing->pix_clk_100hz / 10) == (uint32_t) 25175 && timing->h_addressable == (uint32_t) 640 && @@ -2495,7 +2635,11 @@ bool decide_edp_link_settings(struct dc_link *link, struct dc_link_settings *lin struct dc_link_settings current_link_setting; uint32_t link_bw; - if (link->dpcd_caps.dpcd_rev.raw < DPCD_REV_14 || + /* + * edp_supported_link_rates_count is only valid for eDP v1.4 or higher. + * Per VESA eDP spec, "The DPCD revision for eDP v1.4 is 13h" + */ + if (link->dpcd_caps.dpcd_rev.raw < DPCD_REV_13 || link->dpcd_caps.edp_supported_link_rates_count == 0) { *link_setting = link->verified_link_cap; return true; @@ -2593,13 +2737,11 @@ static bool allow_hpd_rx_irq(const struct dc_link *link) /* * Don't handle RX IRQ unless one of following is met: * 1) The link is established (cur_link_settings != unknown) - * 2) We kicked off MST detection - * 3) We know we're dealing with an active dongle + * 2) We know we're dealing with a branch device, SST or MST */ if ((link->cur_link_settings.lane_count != LANE_COUNT_UNKNOWN) || - (link->type == dc_connection_mst_branch) || - is_dp_active_dongle(link)) + is_dp_branch_device(link)) return true; return false; @@ -2697,9 +2839,10 @@ static void dp_test_send_phy_test_pattern(struct dc_link *link) union phy_test_pattern dpcd_test_pattern; union lane_adjust dpcd_lane_adjustment[2]; unsigned char dpcd_post_cursor_2_adjustment = 0; - unsigned char test_80_bit_pattern[ + unsigned char test_pattern_buffer[ (DP_TEST_80BIT_CUSTOM_PATTERN_79_72 - DP_TEST_80BIT_CUSTOM_PATTERN_7_0)+1] = {0}; + unsigned int test_pattern_size = 0; enum dp_test_pattern test_pattern; struct dc_link_training_settings link_settings; union lane_adjust dpcd_lane_adjust; @@ -2769,12 +2912,15 @@ static void dp_test_send_phy_test_pattern(struct dc_link *link) break; } - if (test_pattern == DP_TEST_PATTERN_80BIT_CUSTOM) + if (test_pattern == DP_TEST_PATTERN_80BIT_CUSTOM) { + test_pattern_size = (DP_TEST_80BIT_CUSTOM_PATTERN_79_72 - + DP_TEST_80BIT_CUSTOM_PATTERN_7_0) + 1; core_link_read_dpcd( link, DP_TEST_80BIT_CUSTOM_PATTERN_7_0, - test_80_bit_pattern, - sizeof(test_80_bit_pattern)); + test_pattern_buffer, + test_pattern_size); + } /* prepare link training settings */ link_settings.link = link->cur_link_settings; @@ -2812,9 +2958,8 @@ static void dp_test_send_phy_test_pattern(struct dc_link *link) test_pattern, DP_TEST_PATTERN_COLOR_SPACE_UNDEFINED, &link_training_settings, - test_80_bit_pattern, - (DP_TEST_80BIT_CUSTOM_PATTERN_79_72 - - DP_TEST_80BIT_CUSTOM_PATTERN_7_0)+1); + test_pattern_buffer, + test_pattern_size); } static void dp_test_send_link_test_pattern(struct dc_link *link) @@ -2899,6 +3044,22 @@ static void dp_test_send_link_test_pattern(struct dc_link *link) break; } + switch (dpcd_test_params.bits.CLR_FORMAT) { + case 0: + pipe_ctx->stream->timing.pixel_encoding = PIXEL_ENCODING_RGB; + break; + case 1: + pipe_ctx->stream->timing.pixel_encoding = PIXEL_ENCODING_YCBCR422; + break; + case 2: + pipe_ctx->stream->timing.pixel_encoding = PIXEL_ENCODING_YCBCR444; + break; + default: + pipe_ctx->stream->timing.pixel_encoding = PIXEL_ENCODING_RGB; + break; + } + + if (requestColorDepth != COLOR_DEPTH_UNDEFINED && pipe_ctx->stream->timing.display_color_depth != requestColorDepth) { DC_LOG_DEBUG("%s: original bpc %d, changing to %d\n", @@ -2906,9 +3067,10 @@ static void dp_test_send_link_test_pattern(struct dc_link *link) pipe_ctx->stream->timing.display_color_depth, requestColorDepth); pipe_ctx->stream->timing.display_color_depth = requestColorDepth; - dp_update_dsc_config(pipe_ctx); } + dp_update_dsc_config(pipe_ctx); + dc_link_dp_set_test_pattern( link, test_pattern, @@ -3164,7 +3326,7 @@ bool dc_link_handle_hpd_rx_irq(struct dc_link *link, union hpd_irq_data *out_hpd *out_link_loss = true; } - if (link->type == dc_connection_active_dongle && + if (link->type == dc_connection_sst_branch && hpd_irq_dpcd_data.bytes.sink_cnt.bits.SINK_COUNT != link->dpcd_sink_count) status = true; @@ -3215,6 +3377,12 @@ bool is_mst_supported(struct dc_link *link) bool is_dp_active_dongle(const struct dc_link *link) { + return (link->dpcd_caps.dongle_type >= DISPLAY_DONGLE_DP_VGA_CONVERTER) && + (link->dpcd_caps.dongle_type <= DISPLAY_DONGLE_DP_HDMI_CONVERTER); +} + +bool is_dp_branch_device(const struct dc_link *link) +{ return link->dpcd_caps.is_branch_dev; } @@ -3432,79 +3600,16 @@ static bool dpcd_read_sink_ext_caps(struct dc_link *link) return true; } -static bool retrieve_link_cap(struct dc_link *link) +bool dp_retrieve_lttpr_cap(struct dc_link *link) { - /* DP_ADAPTER_CAP - DP_DPCD_REV + 1 == 16 and also DP_DSC_BITS_PER_PIXEL_INC - DP_DSC_SUPPORT + 1 == 16, - * which means size 16 will be good for both of those DPCD register block reads - */ - uint8_t dpcd_data[16]; uint8_t lttpr_dpcd_data[6]; - - /*Only need to read 1 byte starting from DP_DPRX_FEATURE_ENUMERATION_LIST. - */ - uint8_t dpcd_dprx_data = '\0'; - uint8_t dpcd_power_state = '\0'; - - struct dp_device_vendor_id sink_id; - union down_stream_port_count down_strm_port_count; - union edp_configuration_cap edp_config_cap; - union dp_downstream_port_present ds_port = { 0 }; - enum dc_status status = DC_ERROR_UNEXPECTED; - uint32_t read_dpcd_retry_cnt = 3; - int i; - struct dp_sink_hw_fw_revision dp_hw_fw_revision; - bool is_lttpr_present = false; - const uint32_t post_oui_delay = 30; // 30ms bool vbios_lttpr_enable = false; bool vbios_lttpr_interop = false; struct dc_bios *bios = link->dc->ctx->dc_bios; + enum dc_status status = DC_ERROR_UNEXPECTED; + bool is_lttpr_present = false; - memset(dpcd_data, '\0', sizeof(dpcd_data)); memset(lttpr_dpcd_data, '\0', sizeof(lttpr_dpcd_data)); - memset(&down_strm_port_count, - '\0', sizeof(union down_stream_port_count)); - memset(&edp_config_cap, '\0', - sizeof(union edp_configuration_cap)); - - /* if extended timeout is supported in hardware, - * default to LTTPR timeout (3.2ms) first as a W/A for DP link layer - * CTS 4.2.1.1 regression introduced by CTS specs requirement update. - */ - dc_link_aux_try_to_configure_timeout(link->ddc, - LINK_AUX_DEFAULT_LTTPR_TIMEOUT_PERIOD); - - status = core_link_read_dpcd(link, DP_SET_POWER, - &dpcd_power_state, sizeof(dpcd_power_state)); - - /* Delay 1 ms if AUX CH is in power down state. Based on spec - * section 2.3.1.2, if AUX CH may be powered down due to - * write to DPCD 600h = 2. Sink AUX CH is monitoring differential - * signal and may need up to 1 ms before being able to reply. - */ - if (status != DC_OK || dpcd_power_state == DP_SET_POWER_D3) - udelay(1000); - - dpcd_set_source_specific_data(link); - /* Sink may need to configure internals based on vendor, so allow some - * time before proceeding with possibly vendor specific transactions - */ - msleep(post_oui_delay); - - for (i = 0; i < read_dpcd_retry_cnt; i++) { - status = core_link_read_dpcd( - link, - DP_DPCD_REV, - dpcd_data, - sizeof(dpcd_data)); - if (status == DC_OK) - break; - } - - if (status != DC_OK) { - dm_error("%s: Read dpcd data failed.\n", __func__); - return false; - } - /* Query BIOS to determine if LTTPR functionality is forced on by system */ if (bios->funcs->get_lttpr_caps) { enum bp_result bp_query_result; @@ -3550,6 +3655,10 @@ static bool retrieve_link_cap(struct dc_link *link) DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV, lttpr_dpcd_data, sizeof(lttpr_dpcd_data)); + if (status != DC_OK) { + dm_error("%s: Read LTTPR caps data failed.\n", __func__); + return false; + } link->dpcd_caps.lttpr_caps.revision.raw = lttpr_dpcd_data[DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV - @@ -3575,20 +3684,92 @@ static bool retrieve_link_cap(struct dc_link *link) lttpr_dpcd_data[DP_PHY_REPEATER_EXTENDED_WAIT_TIMEOUT - DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV]; - is_lttpr_present = (link->dpcd_caps.lttpr_caps.phy_repeater_cnt > 0 && + /* Attempt to train in LTTPR transparent mode if repeater count exceeds 8. */ + is_lttpr_present = (dp_convert_to_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt) != 0 && link->dpcd_caps.lttpr_caps.max_lane_count > 0 && link->dpcd_caps.lttpr_caps.max_lane_count <= 4 && link->dpcd_caps.lttpr_caps.revision.raw >= 0x14); - if (is_lttpr_present) + if (is_lttpr_present) { CONN_DATA_DETECT(link, lttpr_dpcd_data, sizeof(lttpr_dpcd_data), "LTTPR Caps: "); - else + configure_lttpr_mode_transparent(link); + } else link->lttpr_mode = LTTPR_MODE_NON_LTTPR; } + return is_lttpr_present; +} + +static bool retrieve_link_cap(struct dc_link *link) +{ + /* DP_ADAPTER_CAP - DP_DPCD_REV + 1 == 16 and also DP_DSC_BITS_PER_PIXEL_INC - DP_DSC_SUPPORT + 1 == 16, + * which means size 16 will be good for both of those DPCD register block reads + */ + uint8_t dpcd_data[16]; + /*Only need to read 1 byte starting from DP_DPRX_FEATURE_ENUMERATION_LIST. + */ + uint8_t dpcd_dprx_data = '\0'; + uint8_t dpcd_power_state = '\0'; + + struct dp_device_vendor_id sink_id; + union down_stream_port_count down_strm_port_count; + union edp_configuration_cap edp_config_cap; + union dp_downstream_port_present ds_port = { 0 }; + enum dc_status status = DC_ERROR_UNEXPECTED; + uint32_t read_dpcd_retry_cnt = 3; + int i; + struct dp_sink_hw_fw_revision dp_hw_fw_revision; + const uint32_t post_oui_delay = 30; // 30ms + bool is_lttpr_present = false; + + memset(dpcd_data, '\0', sizeof(dpcd_data)); + memset(&down_strm_port_count, + '\0', sizeof(union down_stream_port_count)); + memset(&edp_config_cap, '\0', + sizeof(union edp_configuration_cap)); + + /* if extended timeout is supported in hardware, + * default to LTTPR timeout (3.2ms) first as a W/A for DP link layer + * CTS 4.2.1.1 regression introduced by CTS specs requirement update. + */ + dc_link_aux_try_to_configure_timeout(link->ddc, + LINK_AUX_DEFAULT_LTTPR_TIMEOUT_PERIOD); + + is_lttpr_present = dp_retrieve_lttpr_cap(link); + + status = core_link_read_dpcd(link, DP_SET_POWER, + &dpcd_power_state, sizeof(dpcd_power_state)); + + /* Delay 1 ms if AUX CH is in power down state. Based on spec + * section 2.3.1.2, if AUX CH may be powered down due to + * write to DPCD 600h = 2. Sink AUX CH is monitoring differential + * signal and may need up to 1 ms before being able to reply. + */ + if (status != DC_OK || dpcd_power_state == DP_SET_POWER_D3) + udelay(1000); + + dpcd_set_source_specific_data(link); + /* Sink may need to configure internals based on vendor, so allow some + * time before proceeding with possibly vendor specific transactions + */ + msleep(post_oui_delay); + + for (i = 0; i < read_dpcd_retry_cnt; i++) { + status = core_link_read_dpcd( + link, + DP_DPCD_REV, + dpcd_data, + sizeof(dpcd_data)); + if (status == DC_OK) + break; + } + + if (status != DC_OK) { + dm_error("%s: Read receiver caps dpcd data failed.\n", __func__); + return false; + } if (!is_lttpr_present) dc_link_aux_try_to_configure_timeout(link->ddc, LINK_AUX_DEFAULT_TIMEOUT_PERIOD); - { union training_aux_rd_interval aux_rd_interval; @@ -3892,7 +4073,11 @@ void detect_edp_sink_caps(struct dc_link *link) link->dpcd_caps.edp_supported_link_rates_count = 0; memset(supported_link_rates, 0, sizeof(supported_link_rates)); - if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_14 && + /* + * edp_supported_link_rates_count is only valid for eDP v1.4 or higher. + * Per VESA eDP spec, "The DPCD revision for eDP v1.4 is 13h" + */ + if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_13 && (link->dc->debug.optimize_edp_link_rate || link->reported_link_cap.link_rate == LINK_RATE_UNKNOWN)) { // Read DPCD 00010h - 0001Fh 16 bytes at one shot @@ -4472,50 +4657,74 @@ enum dp_panel_mode dp_get_panel_mode(struct dc_link *link) return DP_PANEL_MODE_DEFAULT; } -void dp_set_fec_ready(struct dc_link *link, bool ready) +enum dc_status dp_set_fec_ready(struct dc_link *link, bool ready) { /* FEC has to be "set ready" before the link training. * The policy is to always train with FEC * if the sink supports it and leave it enabled on link. * If FEC is not supported, disable it. */ - struct link_encoder *link_enc = link->link_enc; + struct link_encoder *link_enc = NULL; + enum dc_status status = DC_OK; uint8_t fec_config = 0; + /* Access link encoder based on whether it is statically + * or dynamically assigned to a link. + */ + if (link->is_dig_mapping_flexible && + link->dc->res_pool->funcs->link_encs_assign) + link_enc = link_enc_cfg_get_link_enc_used_by_link(link->dc->current_state, link); + else + link_enc = link->link_enc; + ASSERT(link_enc); + if (!dc_link_should_enable_fec(link)) - return; + return status; if (link_enc->funcs->fec_set_ready && link->dpcd_caps.fec_cap.bits.FEC_CAPABLE) { if (ready) { fec_config = 1; - if (core_link_write_dpcd(link, + status = core_link_write_dpcd(link, DP_FEC_CONFIGURATION, &fec_config, - sizeof(fec_config)) == DC_OK) { + sizeof(fec_config)); + if (status == DC_OK) { link_enc->funcs->fec_set_ready(link_enc, true); link->fec_state = dc_link_fec_ready; } else { - link->link_enc->funcs->fec_set_ready(link->link_enc, false); + link_enc->funcs->fec_set_ready(link->link_enc, false); link->fec_state = dc_link_fec_not_ready; dm_error("dpcd write failed to set fec_ready"); } } else if (link->fec_state == dc_link_fec_ready) { fec_config = 0; - core_link_write_dpcd(link, + status = core_link_write_dpcd(link, DP_FEC_CONFIGURATION, &fec_config, sizeof(fec_config)); - link->link_enc->funcs->fec_set_ready( - link->link_enc, false); + link_enc->funcs->fec_set_ready(link_enc, false); link->fec_state = dc_link_fec_not_ready; } } + + return status; } void dp_set_fec_enable(struct dc_link *link, bool enable) { - struct link_encoder *link_enc = link->link_enc; + struct link_encoder *link_enc = NULL; + + /* Access link encoder based on whether it is statically + * or dynamically assigned to a link. + */ + if (link->is_dig_mapping_flexible && + link->dc->res_pool->funcs->link_encs_assign) + link_enc = link_enc_cfg_get_link_enc_used_by_link( + link->dc->current_state, link); + else + link_enc = link->link_enc; + ASSERT(link_enc); if (!dc_link_should_enable_fec(link)) return; @@ -4766,4 +4975,11 @@ bool is_edp_ilr_optimization_required(struct dc_link *link, struct dc_crtc_timin return false; } +enum dp_link_encoding dp_get_link_encoding_format(const struct dc_link_settings *link_settings) +{ + if ((link_settings->link_rate >= LINK_RATE_LOW) && + (link_settings->link_rate <= LINK_RATE_HIGH3)) + return DP_8b_10b_ENCODING; + return DP_UNKNOWN_ENCODING; +} |