1 // SPDX-License-Identifier: MIT
18 	return intel_dp->alpm_dpcd & DP_ALPM_CAP;  in intel_alpm_aux_wake_supported()
23 	return intel_dp->alpm_dpcd & DP_ALPM_AUX_LESS_CAP;  in intel_alpm_aux_less_wake_supported()
30 	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_RECEIVER_ALPM_CAP, &dpcd) < 0)  in intel_alpm_init_dpcd()
33 	intel_dp->alpm_dpcd = dpcd;  in intel_alpm_init_dpcd()
39  * Silence_period = tSilence,Min + ((tSilence,Max - tSilence,Min) / 2)
43  * Link rates 1.62 - 4.32 and tLFPS_Cycle = 70 ns
44  * FLOOR( (Link Rate * tLFPS_Cycle) / (2 * 10) )
46  * Link rates 5.4 - 8.1
47  * PORT_ALPM_LFPS_CTL[ LFPS Cycle Count ] = 10
48  * LFPS Period chosen is the mid-point of the min:max values from the table
98 		*silence_period = *lfps_half_cycle = -1;  in _lnl_get_silence_period_and_lfps_half_cycle()
105  * AUX-Less Wake Time = CEILING( ((PHY P2 to P0) + tLFPS_Period, Max+
112  * The tPHY Establishment (a.k.a. t1) term is 50us
120  * tML_PHY_LOCK = TPS4 Length * ( 10 / (Link Rate in MHz) )
128 	int t1 = 50 * 1000;  in _lnl_compute_aux_less_wake_time()  local
130 	/* port_clock is link rate in 10kbit/s units */  in _lnl_compute_aux_less_wake_time()
137 			    t1 + tcds, 1000);  in _lnl_compute_aux_less_wake_time()
149 		_lnl_compute_aux_less_wake_time(crtc_state->port_clock);  in _lnl_compute_aux_less_alpm_params()
150 	aux_less_wake_lines = intel_usecs_to_scanlines(&crtc_state->hw.adjusted_mode,  in _lnl_compute_aux_less_alpm_params()
153 	if (!_lnl_get_silence_period_and_lfps_half_cycle(crtc_state->port_clock,  in _lnl_compute_aux_less_alpm_params()
163 	if (display->params.psr_safest_params)  in _lnl_compute_aux_less_alpm_params()
166 	intel_dp->alpm_parameters.aux_less_wake_lines = aux_less_wake_lines;  in _lnl_compute_aux_less_alpm_params()
167 	intel_dp->alpm_parameters.silence_period_sym_clocks = silence_period;  in _lnl_compute_aux_less_alpm_params()
168 	intel_dp->alpm_parameters.lfps_half_cycle_num_of_syms = lfps_half_cycle;  in _lnl_compute_aux_less_alpm_params()
184 		intel_usecs_to_scanlines(&crtc_state->hw.adjusted_mode, 5);  in _lnl_compute_alpm_params()
192 	if (display->params.psr_safest_params)  in _lnl_compute_alpm_params()
195 	intel_dp->alpm_parameters.check_entry_lines = check_entry_lines;  in _lnl_compute_alpm_params()
203  * not (improperly) included in 32 us fast wake time. 50 us - 32 us = 18 us.
212 	return 10;  in tgl_io_buffer_wake_time()
233 	int precharge = intel_dp_aux_fw_sync_len(intel_dp) - preamble;  in intel_alpm_compute_params()
249 		&crtc_state->hw.adjusted_mode, io_wake_time);  in intel_alpm_compute_params()
251 		&crtc_state->hw.adjusted_mode, fast_wake_time);  in intel_alpm_compute_params()
260 	if (display->params.psr_safest_params)  in intel_alpm_compute_params()
264 	intel_dp->alpm_parameters.io_wake_lines = max(io_wake_lines, 7);  in intel_alpm_compute_params()
265 	intel_dp->alpm_parameters.fast_wake_lines = max(fast_wake_lines, 7);  in intel_alpm_compute_params()
275 	struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;  in intel_alpm_lobf_compute_config()
285 	if (!intel_dp->as_sdp_supported)  in intel_alpm_lobf_compute_config()
288 	if (crtc_state->has_psr)  in intel_alpm_lobf_compute_config()
298 	context_latency = adjusted_mode->crtc_vblank_start - adjusted_mode->crtc_vdisplay;  in intel_alpm_lobf_compute_config()
299 	guardband = adjusted_mode->crtc_vtotal -  in intel_alpm_lobf_compute_config()
300 		    adjusted_mode->crtc_vdisplay - context_latency;  in intel_alpm_lobf_compute_config()
301 	first_sdp_position = adjusted_mode->crtc_vtotal - adjusted_mode->crtc_vsync_start;  in intel_alpm_lobf_compute_config()
303 		waketime_in_lines = intel_dp->alpm_parameters.io_wake_lines;  in intel_alpm_lobf_compute_config()
305 		waketime_in_lines = intel_dp->alpm_parameters.aux_less_wake_lines;  in intel_alpm_lobf_compute_config()
307 	crtc_state->has_lobf = (context_latency + guardband) >  in intel_alpm_lobf_compute_config()
315 	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;  in lnl_alpm_configure()
316 	enum port port = dp_to_dig_port(intel_dp)->base.port;  in lnl_alpm_configure()
320 	    (!intel_dp->psr.sel_update_enabled && !intel_dp_is_edp(intel_dp)))  in lnl_alpm_configure()
327 	if ((intel_dp->psr.panel_replay_enabled && intel_dp_is_edp(intel_dp)) ||  in lnl_alpm_configure()
328 	    (crtc_state->has_lobf && intel_alpm_aux_less_wake_supported(intel_dp))) {  in lnl_alpm_configure()
332 			ALPM_CTL_AUX_LESS_WAKE_TIME(intel_dp->alpm_parameters.aux_less_wake_lines);  in lnl_alpm_configure()
340 				       intel_dp->alpm_parameters.silence_period_sym_clocks));  in lnl_alpm_configure()
344 			       PORT_ALPM_LFPS_CTL_LFPS_CYCLE_COUNT(10) |  in lnl_alpm_configure()
346 				       intel_dp->alpm_parameters.lfps_half_cycle_num_of_syms) |  in lnl_alpm_configure()
348 				       intel_dp->alpm_parameters.lfps_half_cycle_num_of_syms) |  in lnl_alpm_configure()
350 				       intel_dp->alpm_parameters.lfps_half_cycle_num_of_syms));  in lnl_alpm_configure()
353 			ALPM_CTL_EXTENDED_FAST_WAKE_TIME(intel_dp->alpm_parameters.fast_wake_lines);  in lnl_alpm_configure()
356 	if (crtc_state->has_lobf)  in lnl_alpm_configure()
359 	alpm_ctl |= ALPM_CTL_ALPM_ENTRY_CHECK(intel_dp->alpm_parameters.check_entry_lines);  in lnl_alpm_configure()
372 	struct intel_connector *connector = m->private;  in i915_edp_lobf_info_show()
380 	ret = drm_modeset_lock_single_interruptible(&display->drm->mode_config.connection_mutex);  in i915_edp_lobf_info_show()
384 	crtc = connector->base.state->crtc;  in i915_edp_lobf_info_show()
385 	if (connector->base.status != connector_status_connected || !crtc) {  in i915_edp_lobf_info_show()
386 		ret = -ENODEV;  in i915_edp_lobf_info_show()
390 	crtc_state = to_intel_crtc_state(crtc->state);  in i915_edp_lobf_info_show()
391 	cpu_transcoder = crtc_state->cpu_transcoder;  in i915_edp_lobf_info_show()
394 	seq_printf(m, "Aux-wake alpm status: %s\n",  in i915_edp_lobf_info_show()
396 	seq_printf(m, "Aux-less alpm status: %s\n",  in i915_edp_lobf_info_show()
399 	drm_modeset_unlock(&display->drm->mode_config.connection_mutex);  in i915_edp_lobf_info_show()
409 	struct dentry *root = connector->base.debugfs_entry;  in intel_alpm_lobf_debugfs_add()
412 	    connector->base.connector_type != DRM_MODE_CONNECTOR_eDP)  in intel_alpm_lobf_debugfs_add()