diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp_link_training.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_link_training.c | 48 |
1 files changed, 38 insertions, 10 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c b/drivers/gpu/drm/i915/display/intel_dp_link_training.c index 2966f5b39392..a479b63112ea 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c @@ -56,6 +56,8 @@ lt_dbg(_intel_dp, _dp_phy, "Sink disconnected: " _format, ## __VA_ARGS__); \ } while (0) +#define MAX_SEQ_TRAIN_FAILURES 2 + static void intel_dp_reset_lttpr_common_caps(struct intel_dp *intel_dp) { memset(intel_dp->lttpr_common_caps, 0, sizeof(intel_dp->lttpr_common_caps)); @@ -164,7 +166,7 @@ static int intel_dp_init_lttpr_phys(struct intel_dp *intel_dp, const u8 dpcd[DP_ * resetting its internal state when the mode is changed from * non-transparent to transparent. */ - if (intel_dp->link_trained) { + if (intel_dp->link.active) { if (lttpr_count < 0 || intel_dp_lttpr_transparent_mode_enabled(intel_dp)) goto out_reset_lttpr_count; @@ -711,8 +713,21 @@ void intel_dp_link_training_set_mode(struct intel_dp *intel_dp, int link_rate, b static void intel_dp_update_downspread_ctrl(struct intel_dp *intel_dp, const struct intel_crtc_state *crtc_state) { + /* + * Currently, we set the MSA ignore bit based on vrr.in_range. + * We can't really read that out during driver load since we don't have + * the connector information read in yet. So if we do end up doing a + * modeset during initial_commit() we'll clear the MSA ignore bit. + * GOP likely wouldn't have set this bit so after the initial commit, + * if there are no modesets and we enable VRR mode seamlessly + * (without a full modeset), the MSA ignore bit might never get set. + * + * #TODO: Implement readout of vrr.in_range. + * We need fastset support for setting the MSA ignore bit in DPCD, + * especially on the first real commit when clearing the inherited flag. + */ intel_dp_link_training_set_mode(intel_dp, - crtc_state->port_clock, crtc_state->vrr.flipline); + crtc_state->port_clock, crtc_state->vrr.in_range); } void intel_dp_link_training_set_bw(struct intel_dp *intel_dp, @@ -1110,7 +1125,10 @@ intel_dp_128b132b_intra_hop(struct intel_dp *intel_dp, void intel_dp_stop_link_train(struct intel_dp *intel_dp, const struct intel_crtc_state *crtc_state) { - intel_dp->link_trained = true; + struct intel_display *display = to_intel_display(intel_dp); + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base; + + intel_dp->link.active = true; intel_dp_disable_dpcd_training_pattern(intel_dp, DP_PHY_DPRX); intel_dp_program_link_training_pattern(intel_dp, crtc_state, DP_PHY_DPRX, @@ -1120,6 +1138,15 @@ void intel_dp_stop_link_train(struct intel_dp *intel_dp, wait_for(intel_dp_128b132b_intra_hop(intel_dp, crtc_state) == 0, 500)) { lt_dbg(intel_dp, DP_PHY_DPRX, "128b/132b intra-hop not clearing\n"); } + + intel_hpd_unblock(encoder); + + if (!display->hotplug.ignore_long_hpd && + intel_dp->link.seq_train_failures < MAX_SEQ_TRAIN_FAILURES) { + int delay_ms = intel_dp->link.seq_train_failures ? 0 : 2000; + + intel_encoder_link_check_queue_work(encoder, delay_ms); + } } static bool @@ -1602,7 +1629,11 @@ void intel_dp_start_link_train(struct intel_atomic_state *state, * non-transparent mode. During an earlier LTTPR detection this * could've been prevented by an active link. */ - int lttpr_count = intel_dp_init_lttpr_and_dprx_caps(intel_dp); + int lttpr_count; + + intel_hpd_block(encoder); + + lttpr_count = intel_dp_init_lttpr_and_dprx_caps(intel_dp); if (lttpr_count < 0) /* Still continue with enabling the port and link training. */ @@ -1620,7 +1651,6 @@ void intel_dp_start_link_train(struct intel_atomic_state *state, lt_dbg(intel_dp, DP_PHY_DPRX, "Forcing link training failure\n"); } else if (passed) { intel_dp->link.seq_train_failures = 0; - intel_encoder_link_check_queue_work(encoder, 2000); return; } @@ -1643,10 +1673,8 @@ void intel_dp_start_link_train(struct intel_atomic_state *state, return; } - if (intel_dp->link.seq_train_failures < 2) { - intel_encoder_link_check_queue_work(encoder, 0); + if (intel_dp->link.seq_train_failures < MAX_SEQ_TRAIN_FAILURES) return; - } if (intel_dp_schedule_fallback_link_training(state, intel_dp, crtc_state)) return; @@ -1693,7 +1721,7 @@ static int i915_dp_force_link_rate_show(struct seq_file *m, void *data) if (err) return err; - if (intel_dp->link_trained) + if (intel_dp->link.active) current_rate = intel_dp->link_rate; force_rate = intel_dp->link.force_rate; @@ -1791,7 +1819,7 @@ static int i915_dp_force_lane_count_show(struct seq_file *m, void *data) if (err) return err; - if (intel_dp->link_trained) + if (intel_dp->link.active) current_lane_count = intel_dp->lane_count; force_lane_count = intel_dp->link.force_lane_count; |