2 * Copyright © 2014 Intel Corporation
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:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
24 #include <linux/kernel.h>
25 #include <linux/component.h>
26 #include <drm/i915_component.h>
27 #include "intel_drv.h"
30 #include <drm/drm_edid.h>
34 * DOC: High Definition Audio over HDMI and Display Port
36 * The graphics and audio drivers together support High Definition Audio over
37 * HDMI and Display Port. The audio programming sequences are divided into audio
38 * codec and controller enable and disable sequences. The graphics driver
39 * handles the audio codec sequences, while the audio driver handles the audio
40 * controller sequences.
42 * The disable sequences must be performed before disabling the transcoder or
43 * port. The enable sequences may only be performed after enabling the
44 * transcoder and port, and after completed link training. Therefore the audio
45 * enable/disable sequences are part of the modeset sequence.
47 * The codec and controller sequences could be done either parallel or serial,
48 * but generally the ELDV/PD change in the codec sequence indicates to the audio
49 * driver that the controller sequence should start. Indeed, most of the
50 * co-operation between the graphics and audio drivers is handled via audio
51 * related registers. (The notable exception is the power management, not
58 } hdmi_audio_clock[] = {
59 { DIV_ROUND_UP(25200 * 1000, 1001), AUD_CONFIG_PIXEL_CLOCK_HDMI_25175 },
60 { 25200, AUD_CONFIG_PIXEL_CLOCK_HDMI_25200 }, /* default per bspec */
61 { 27000, AUD_CONFIG_PIXEL_CLOCK_HDMI_27000 },
62 { 27000 * 1001 / 1000, AUD_CONFIG_PIXEL_CLOCK_HDMI_27027 },
63 { 54000, AUD_CONFIG_PIXEL_CLOCK_HDMI_54000 },
64 { 54000 * 1001 / 1000, AUD_CONFIG_PIXEL_CLOCK_HDMI_54054 },
65 { DIV_ROUND_UP(74250 * 1000, 1001), AUD_CONFIG_PIXEL_CLOCK_HDMI_74176 },
66 { 74250, AUD_CONFIG_PIXEL_CLOCK_HDMI_74250 },
67 { DIV_ROUND_UP(148500 * 1000, 1001), AUD_CONFIG_PIXEL_CLOCK_HDMI_148352 },
68 { 148500, AUD_CONFIG_PIXEL_CLOCK_HDMI_148500 },
71 /* get AUD_CONFIG_PIXEL_CLOCK_HDMI_* value for mode */
72 static u32 audio_config_hdmi_pixel_clock(struct drm_display_mode *mode)
76 for (i = 0; i < ARRAY_SIZE(hdmi_audio_clock); i++) {
77 if (mode->clock == hdmi_audio_clock[i].clock)
81 if (i == ARRAY_SIZE(hdmi_audio_clock)) {
82 DRM_DEBUG_KMS("HDMI audio pixel clock setting for %d not found, falling back to defaults\n", mode->clock);
86 DRM_DEBUG_KMS("Configuring HDMI audio for pixel clock %d (0x%08x)\n",
87 hdmi_audio_clock[i].clock,
88 hdmi_audio_clock[i].config);
90 return hdmi_audio_clock[i].config;
93 static bool intel_eld_uptodate(struct drm_connector *connector,
94 int reg_eldv, uint32_t bits_eldv,
95 int reg_elda, uint32_t bits_elda,
98 struct drm_i915_private *dev_priv = connector->dev->dev_private;
99 uint8_t *eld = connector->eld;
103 tmp = I915_READ(reg_eldv);
109 tmp = I915_READ(reg_elda);
111 I915_WRITE(reg_elda, tmp);
113 for (i = 0; i < drm_eld_size(eld) / 4; i++)
114 if (I915_READ(reg_edid) != *((uint32_t *)eld + i))
120 static void g4x_audio_codec_disable(struct intel_encoder *encoder)
122 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
125 DRM_DEBUG_KMS("Disable audio codec\n");
127 tmp = I915_READ(G4X_AUD_VID_DID);
128 if (tmp == INTEL_AUDIO_DEVBLC || tmp == INTEL_AUDIO_DEVCL)
129 eldv = G4X_ELDV_DEVCL_DEVBLC;
131 eldv = G4X_ELDV_DEVCTG;
134 tmp = I915_READ(G4X_AUD_CNTL_ST);
136 I915_WRITE(G4X_AUD_CNTL_ST, tmp);
139 static void g4x_audio_codec_enable(struct drm_connector *connector,
140 struct intel_encoder *encoder,
141 struct drm_display_mode *mode)
143 struct drm_i915_private *dev_priv = connector->dev->dev_private;
144 uint8_t *eld = connector->eld;
149 DRM_DEBUG_KMS("Enable audio codec, %u bytes ELD\n", eld[2]);
151 tmp = I915_READ(G4X_AUD_VID_DID);
152 if (tmp == INTEL_AUDIO_DEVBLC || tmp == INTEL_AUDIO_DEVCL)
153 eldv = G4X_ELDV_DEVCL_DEVBLC;
155 eldv = G4X_ELDV_DEVCTG;
157 if (intel_eld_uptodate(connector,
158 G4X_AUD_CNTL_ST, eldv,
159 G4X_AUD_CNTL_ST, G4X_ELD_ADDR_MASK,
163 tmp = I915_READ(G4X_AUD_CNTL_ST);
164 tmp &= ~(eldv | G4X_ELD_ADDR_MASK);
165 len = (tmp >> 9) & 0x1f; /* ELD buffer size */
166 I915_WRITE(G4X_AUD_CNTL_ST, tmp);
168 len = min(drm_eld_size(eld) / 4, len);
169 DRM_DEBUG_DRIVER("ELD size %d\n", len);
170 for (i = 0; i < len; i++)
171 I915_WRITE(G4X_HDMIW_HDMIEDID, *((uint32_t *)eld + i));
173 tmp = I915_READ(G4X_AUD_CNTL_ST);
175 I915_WRITE(G4X_AUD_CNTL_ST, tmp);
178 static void hsw_audio_codec_disable(struct intel_encoder *encoder)
180 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
181 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
182 enum pipe pipe = intel_crtc->pipe;
185 DRM_DEBUG_KMS("Disable audio codec on pipe %c\n", pipe_name(pipe));
187 /* Disable timestamps */
188 tmp = I915_READ(HSW_AUD_CFG(pipe));
189 tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
190 tmp |= AUD_CONFIG_N_PROG_ENABLE;
191 tmp &= ~AUD_CONFIG_UPPER_N_MASK;
192 tmp &= ~AUD_CONFIG_LOWER_N_MASK;
193 if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT))
194 tmp |= AUD_CONFIG_N_VALUE_INDEX;
195 I915_WRITE(HSW_AUD_CFG(pipe), tmp);
198 tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
199 tmp &= ~AUDIO_ELD_VALID(pipe);
200 tmp &= ~AUDIO_OUTPUT_ENABLE(pipe);
201 I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
204 static void hsw_audio_codec_enable(struct drm_connector *connector,
205 struct intel_encoder *encoder,
206 struct drm_display_mode *mode)
208 struct drm_i915_private *dev_priv = connector->dev->dev_private;
209 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
210 enum pipe pipe = intel_crtc->pipe;
211 const uint8_t *eld = connector->eld;
215 DRM_DEBUG_KMS("Enable audio codec on pipe %c, %u bytes ELD\n",
216 pipe_name(pipe), drm_eld_size(eld));
218 /* Enable audio presence detect, invalidate ELD */
219 tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
220 tmp |= AUDIO_OUTPUT_ENABLE(pipe);
221 tmp &= ~AUDIO_ELD_VALID(pipe);
222 I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
225 * FIXME: We're supposed to wait for vblank here, but we have vblanks
226 * disabled during the mode set. The proper fix would be to push the
227 * rest of the setup into a vblank work item, queued here, but the
228 * infrastructure is not there yet.
231 /* Reset ELD write address */
232 tmp = I915_READ(HSW_AUD_DIP_ELD_CTRL(pipe));
233 tmp &= ~IBX_ELD_ADDRESS_MASK;
234 I915_WRITE(HSW_AUD_DIP_ELD_CTRL(pipe), tmp);
236 /* Up to 84 bytes of hw ELD buffer */
237 len = min(drm_eld_size(eld), 84);
238 for (i = 0; i < len / 4; i++)
239 I915_WRITE(HSW_AUD_EDID_DATA(pipe), *((uint32_t *)eld + i));
242 tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
243 tmp |= AUDIO_ELD_VALID(pipe);
244 I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
246 /* Enable timestamps */
247 tmp = I915_READ(HSW_AUD_CFG(pipe));
248 tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
249 tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
250 tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
251 if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT))
252 tmp |= AUD_CONFIG_N_VALUE_INDEX;
254 tmp |= audio_config_hdmi_pixel_clock(mode);
255 I915_WRITE(HSW_AUD_CFG(pipe), tmp);
258 static void ilk_audio_codec_disable(struct intel_encoder *encoder)
260 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
261 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
262 struct intel_digital_port *intel_dig_port =
263 enc_to_dig_port(&encoder->base);
264 enum port port = intel_dig_port->port;
265 enum pipe pipe = intel_crtc->pipe;
270 DRM_DEBUG_KMS("Disable audio codec on port %c, pipe %c\n",
271 port_name(port), pipe_name(pipe));
273 if (WARN_ON(port == PORT_A))
276 if (HAS_PCH_IBX(dev_priv->dev)) {
277 aud_config = IBX_AUD_CFG(pipe);
278 aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
279 } else if (IS_VALLEYVIEW(dev_priv)) {
280 aud_config = VLV_AUD_CFG(pipe);
281 aud_cntrl_st2 = VLV_AUD_CNTL_ST2;
283 aud_config = CPT_AUD_CFG(pipe);
284 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
287 /* Disable timestamps */
288 tmp = I915_READ(aud_config);
289 tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
290 tmp |= AUD_CONFIG_N_PROG_ENABLE;
291 tmp &= ~AUD_CONFIG_UPPER_N_MASK;
292 tmp &= ~AUD_CONFIG_LOWER_N_MASK;
293 if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT))
294 tmp |= AUD_CONFIG_N_VALUE_INDEX;
295 I915_WRITE(aud_config, tmp);
297 eldv = IBX_ELD_VALID(port);
300 tmp = I915_READ(aud_cntrl_st2);
302 I915_WRITE(aud_cntrl_st2, tmp);
305 static void ilk_audio_codec_enable(struct drm_connector *connector,
306 struct intel_encoder *encoder,
307 struct drm_display_mode *mode)
309 struct drm_i915_private *dev_priv = connector->dev->dev_private;
310 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
311 struct intel_digital_port *intel_dig_port =
312 enc_to_dig_port(&encoder->base);
313 enum port port = intel_dig_port->port;
314 enum pipe pipe = intel_crtc->pipe;
315 uint8_t *eld = connector->eld;
324 DRM_DEBUG_KMS("Enable audio codec on port %c, pipe %c, %u bytes ELD\n",
325 port_name(port), pipe_name(pipe), drm_eld_size(eld));
327 if (WARN_ON(port == PORT_A))
331 * FIXME: We're supposed to wait for vblank here, but we have vblanks
332 * disabled during the mode set. The proper fix would be to push the
333 * rest of the setup into a vblank work item, queued here, but the
334 * infrastructure is not there yet.
337 if (HAS_PCH_IBX(connector->dev)) {
338 hdmiw_hdmiedid = IBX_HDMIW_HDMIEDID(pipe);
339 aud_config = IBX_AUD_CFG(pipe);
340 aud_cntl_st = IBX_AUD_CNTL_ST(pipe);
341 aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
342 } else if (IS_VALLEYVIEW(connector->dev)) {
343 hdmiw_hdmiedid = VLV_HDMIW_HDMIEDID(pipe);
344 aud_config = VLV_AUD_CFG(pipe);
345 aud_cntl_st = VLV_AUD_CNTL_ST(pipe);
346 aud_cntrl_st2 = VLV_AUD_CNTL_ST2;
348 hdmiw_hdmiedid = CPT_HDMIW_HDMIEDID(pipe);
349 aud_config = CPT_AUD_CFG(pipe);
350 aud_cntl_st = CPT_AUD_CNTL_ST(pipe);
351 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
354 eldv = IBX_ELD_VALID(port);
357 tmp = I915_READ(aud_cntrl_st2);
359 I915_WRITE(aud_cntrl_st2, tmp);
361 /* Reset ELD write address */
362 tmp = I915_READ(aud_cntl_st);
363 tmp &= ~IBX_ELD_ADDRESS_MASK;
364 I915_WRITE(aud_cntl_st, tmp);
366 /* Up to 84 bytes of hw ELD buffer */
367 len = min(drm_eld_size(eld), 84);
368 for (i = 0; i < len / 4; i++)
369 I915_WRITE(hdmiw_hdmiedid, *((uint32_t *)eld + i));
372 tmp = I915_READ(aud_cntrl_st2);
374 I915_WRITE(aud_cntrl_st2, tmp);
376 /* Enable timestamps */
377 tmp = I915_READ(aud_config);
378 tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
379 tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
380 tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
381 if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT))
382 tmp |= AUD_CONFIG_N_VALUE_INDEX;
384 tmp |= audio_config_hdmi_pixel_clock(mode);
385 I915_WRITE(aud_config, tmp);
389 * intel_audio_codec_enable - Enable the audio codec for HD audio
390 * @intel_encoder: encoder on which to enable audio
392 * The enable sequences may only be performed after enabling the transcoder and
393 * port, and after completed link training.
395 void intel_audio_codec_enable(struct intel_encoder *intel_encoder)
397 struct drm_encoder *encoder = &intel_encoder->base;
398 struct intel_crtc *crtc = to_intel_crtc(encoder->crtc);
399 struct drm_display_mode *mode = &crtc->config->base.adjusted_mode;
400 struct drm_connector *connector;
401 struct drm_device *dev = encoder->dev;
402 struct drm_i915_private *dev_priv = dev->dev_private;
403 struct i915_audio_component *acomp = dev_priv->audio_component;
404 struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
405 enum port port = intel_dig_port->port;
407 connector = drm_select_eld(encoder, mode);
411 DRM_DEBUG_DRIVER("ELD on [CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
414 connector->encoder->base.id,
415 connector->encoder->name);
418 connector->eld[5] &= ~(3 << 2);
419 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT))
420 connector->eld[5] |= (1 << 2);
422 connector->eld[6] = drm_av_sync_delay(connector, mode) / 2;
424 if (dev_priv->display.audio_codec_enable)
425 dev_priv->display.audio_codec_enable(connector, intel_encoder, mode);
427 if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify)
428 acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr, (int) port);
432 * intel_audio_codec_disable - Disable the audio codec for HD audio
433 * @encoder: encoder on which to disable audio
435 * The disable sequences must be performed before disabling the transcoder or
438 void intel_audio_codec_disable(struct intel_encoder *intel_encoder)
440 struct drm_encoder *encoder = &intel_encoder->base;
441 struct drm_device *dev = encoder->dev;
442 struct drm_i915_private *dev_priv = dev->dev_private;
443 struct i915_audio_component *acomp = dev_priv->audio_component;
444 struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
445 enum port port = intel_dig_port->port;
447 if (dev_priv->display.audio_codec_disable)
448 dev_priv->display.audio_codec_disable(intel_encoder);
450 if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify)
451 acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr, (int) port);
455 * intel_init_audio - Set up chip specific audio functions
458 void intel_init_audio(struct drm_device *dev)
460 struct drm_i915_private *dev_priv = dev->dev_private;
463 dev_priv->display.audio_codec_enable = g4x_audio_codec_enable;
464 dev_priv->display.audio_codec_disable = g4x_audio_codec_disable;
465 } else if (IS_VALLEYVIEW(dev)) {
466 dev_priv->display.audio_codec_enable = ilk_audio_codec_enable;
467 dev_priv->display.audio_codec_disable = ilk_audio_codec_disable;
468 } else if (IS_HASWELL(dev) || INTEL_INFO(dev)->gen >= 8) {
469 dev_priv->display.audio_codec_enable = hsw_audio_codec_enable;
470 dev_priv->display.audio_codec_disable = hsw_audio_codec_disable;
471 } else if (HAS_PCH_SPLIT(dev)) {
472 dev_priv->display.audio_codec_enable = ilk_audio_codec_enable;
473 dev_priv->display.audio_codec_disable = ilk_audio_codec_disable;
477 static void i915_audio_component_get_power(struct device *dev)
479 intel_display_power_get(dev_to_i915(dev), POWER_DOMAIN_AUDIO);
482 static void i915_audio_component_put_power(struct device *dev)
484 intel_display_power_put(dev_to_i915(dev), POWER_DOMAIN_AUDIO);
487 static void i915_audio_component_codec_wake_override(struct device *dev,
490 struct drm_i915_private *dev_priv = dev_to_i915(dev);
493 if (!IS_SKYLAKE(dev_priv))
497 * Enable/disable generating the codec wake signal, overriding the
498 * internal logic to generate the codec wake to controller.
500 tmp = I915_READ(HSW_AUD_CHICKENBIT);
501 tmp &= ~SKL_AUD_CODEC_WAKE_SIGNAL;
502 I915_WRITE(HSW_AUD_CHICKENBIT, tmp);
503 usleep_range(1000, 1500);
506 tmp = I915_READ(HSW_AUD_CHICKENBIT);
507 tmp |= SKL_AUD_CODEC_WAKE_SIGNAL;
508 I915_WRITE(HSW_AUD_CHICKENBIT, tmp);
509 usleep_range(1000, 1500);
513 /* Get CDCLK in kHz */
514 static int i915_audio_component_get_cdclk_freq(struct device *dev)
516 struct drm_i915_private *dev_priv = dev_to_i915(dev);
519 if (WARN_ON_ONCE(!HAS_DDI(dev_priv)))
522 intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
523 ret = dev_priv->display.get_display_clock_speed(dev_priv->dev);
525 intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO);
530 static const struct i915_audio_component_ops i915_audio_component_ops = {
531 .owner = THIS_MODULE,
532 .get_power = i915_audio_component_get_power,
533 .put_power = i915_audio_component_put_power,
534 .codec_wake_override = i915_audio_component_codec_wake_override,
535 .get_cdclk_freq = i915_audio_component_get_cdclk_freq,
538 static int i915_audio_component_bind(struct device *i915_dev,
539 struct device *hda_dev, void *data)
541 struct i915_audio_component *acomp = data;
542 struct drm_i915_private *dev_priv = dev_to_i915(i915_dev);
544 if (WARN_ON(acomp->ops || acomp->dev))
547 drm_modeset_lock_all(dev_priv->dev);
548 acomp->ops = &i915_audio_component_ops;
549 acomp->dev = i915_dev;
550 dev_priv->audio_component = acomp;
551 drm_modeset_unlock_all(dev_priv->dev);
556 static void i915_audio_component_unbind(struct device *i915_dev,
557 struct device *hda_dev, void *data)
559 struct i915_audio_component *acomp = data;
560 struct drm_i915_private *dev_priv = dev_to_i915(i915_dev);
562 drm_modeset_lock_all(dev_priv->dev);
565 dev_priv->audio_component = NULL;
566 drm_modeset_unlock_all(dev_priv->dev);
569 static const struct component_ops i915_audio_component_bind_ops = {
570 .bind = i915_audio_component_bind,
571 .unbind = i915_audio_component_unbind,
575 * i915_audio_component_init - initialize and register the audio component
576 * @dev_priv: i915 device instance
578 * This will register with the component framework a child component which
579 * will bind dynamically to the snd_hda_intel driver's corresponding master
580 * component when the latter is registered. During binding the child
581 * initializes an instance of struct i915_audio_component which it receives
582 * from the master. The master can then start to use the interface defined by
583 * this struct. Each side can break the binding at any point by deregistering
584 * its own component after which each side's component unbind callback is
587 * We ignore any error during registration and continue with reduced
588 * functionality (i.e. without HDMI audio).
590 void i915_audio_component_init(struct drm_i915_private *dev_priv)
594 ret = component_add(dev_priv->dev->dev, &i915_audio_component_bind_ops);
596 DRM_ERROR("failed to add audio component (%d)\n", ret);
597 /* continue with reduced functionality */
601 dev_priv->audio_component_registered = true;
605 * i915_audio_component_cleanup - deregister the audio component
606 * @dev_priv: i915 device instance
608 * Deregisters the audio component, breaking any existing binding to the
609 * corresponding snd_hda_intel driver's master component.
611 void i915_audio_component_cleanup(struct drm_i915_private *dev_priv)
613 if (!dev_priv->audio_component_registered)
616 component_del(dev_priv->dev->dev, &i915_audio_component_bind_ops);
617 dev_priv->audio_component_registered = false;