diff options
author | Wenjing Liu <wenjing.liu@amd.com> | 2020-08-08 02:08:25 +0300 |
---|---|---|
committer | Alex Deucher <alexander.deucher@amd.com> | 2020-09-16 00:52:40 +0300 |
commit | ce17ce17af328a3a1fd0c5e00f6b04af94b0be01 (patch) | |
tree | 27bea76612b280e180890ea94ee8708ee41b1406 /drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | |
parent | 0b02e1fda5422a144a8bfca9be22547b4d291f20 (diff) | |
download | linux-ce17ce17af328a3a1fd0c5e00f6b04af94b0be01.tar.xz |
drm/amd/display: add option to override cr training pattern
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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 | 33 |
1 files changed, 21 insertions, 12 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 d1d95d3e248a..2334ec428098 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 @@ -101,7 +101,16 @@ static void dpcd_set_training_pattern( dpcd_pattern.v1_4.TRAINING_PATTERN_SET); } -static enum dc_dp_training_pattern get_supported_tp(struct dc_link *link) +static enum dc_dp_training_pattern decide_cr_training_pattern( + const struct dc_link_settings *link_settings) +{ + enum dc_dp_training_pattern pattern = DP_TRAINING_PATTERN_SEQUENCE_1; + + return pattern; +} + +static enum dc_dp_training_pattern decide_eq_training_pattern(struct dc_link *link, + const struct dc_link_settings *link_settings) { enum dc_dp_training_pattern highest_tp = DP_TRAINING_PATTERN_SEQUENCE_2; struct encoder_feature_support *features = &link->link_enc->features; @@ -132,7 +141,6 @@ static void dpcd_set_link_settings( union down_spread_ctrl downspread = { {0} }; union lane_count_set lane_count_set = { {0} }; - enum dc_dp_training_pattern dp_tr_pattern; downspread.raw = (uint8_t) (lt_settings->link_settings.link_spread); @@ -143,9 +151,8 @@ static void dpcd_set_link_settings( lane_count_set.bits.ENHANCED_FRAMING = lt_settings->enhanced_framing; lane_count_set.bits.POST_LT_ADJ_REQ_GRANTED = 0; - dp_tr_pattern = get_supported_tp(link); - if (dp_tr_pattern != DP_TRAINING_PATTERN_SEQUENCE_4) { + if (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; } @@ -979,7 +986,7 @@ static void start_clock_recovery_pattern_early(struct dc_link *link, { DC_LOG_HW_LINK_TRAINING("%s\n GPU sends TPS1. Wait 400us.\n", __func__); - dp_set_hw_training_pattern(link, DP_TRAINING_PATTERN_SEQUENCE_1, offset); + dp_set_hw_training_pattern(link, lt_settings->pattern_for_cr, offset); dp_set_hw_lane_settings(link, lt_settings, offset); udelay(400); } @@ -994,7 +1001,6 @@ static enum link_training_result perform_clock_recovery_sequence( uint32_t wait_time_microsec; struct link_training_settings req_settings; enum dc_lane_count lane_count = lt_settings->link_settings.lane_count; - enum dc_dp_training_pattern tr_pattern = DP_TRAINING_PATTERN_SEQUENCE_1; union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX]; union lane_align_status_updated dpcd_lane_status_updated; @@ -1002,7 +1008,7 @@ static enum link_training_result perform_clock_recovery_sequence( retry_count = 0; if (!link->ctx->dc->work_arounds.lt_early_cr_pattern) - dp_set_hw_training_pattern(link, tr_pattern, offset); + dp_set_hw_training_pattern(link, lt_settings->pattern_for_cr, offset); /* najeeb - The synaptics MST hub can put the LT in * infinite loop by switching the VS @@ -1029,7 +1035,7 @@ static enum link_training_result perform_clock_recovery_sequence( dpcd_set_lt_pattern_and_lane_settings( link, lt_settings, - tr_pattern, + lt_settings->pattern_for_cr, offset); else dpcd_set_lane_settings( @@ -1113,7 +1119,7 @@ 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 || - get_supported_tp(link) == DP_TRAINING_PATTERN_SEQUENCE_4) + lt_settings->pattern_for_eq == DP_TRAINING_PATTERN_SEQUENCE_4) return status; if (status == LINK_TRAINING_SUCCESS && @@ -1252,10 +1258,14 @@ static void initialize_training_settings( else lt_settings->eq_pattern_time = get_training_aux_rd_interval(link, 400); + if (overrides->pattern_for_cr != NULL) + lt_settings->pattern_for_cr = *overrides->pattern_for_cr; + else + lt_settings->pattern_for_cr = decide_cr_training_pattern(link_setting); if (overrides->pattern_for_eq != NULL) lt_settings->pattern_for_eq = *overrides->pattern_for_eq; else - lt_settings->pattern_for_eq = get_supported_tp(link); + lt_settings->pattern_for_eq = decide_eq_training_pattern(link, link_setting); if (overrides->enhanced_framing != NULL) lt_settings->enhanced_framing = *overrides->enhanced_framing; @@ -1457,7 +1467,6 @@ bool dc_link_dp_perform_link_training_skip_aux( const struct dc_link_settings *link_setting) { struct link_training_settings lt_settings; - enum dc_dp_training_pattern pattern_for_cr = DP_TRAINING_PATTERN_SEQUENCE_1; initialize_training_settings( link, @@ -1468,7 +1477,7 @@ bool dc_link_dp_perform_link_training_skip_aux( /* 1. Perform_clock_recovery_sequence. */ /* transmit training pattern for clock recovery */ - dp_set_hw_training_pattern(link, pattern_for_cr, DPRX); + dp_set_hw_training_pattern(link, lt_settings.pattern_for_cr, DPRX); /* call HWSS to set lane settings*/ dp_set_hw_lane_settings(link, <_settings, DPRX); |