i915/display/intel_audio.c

44  * The graphics and audio drivers together support High Definition Audio over
45  * HDMI and Display Port. The audio programming sequences are divided into audio
47  * handles the audio codec sequences, while the audio driver handles the audio
52  * transcoder and port, and after completed link training. Therefore the audio
56  * but generally the ELDV/PD change in the codec sequence indicates to the audio
58  * co-operation between the graphics and audio drivers is handled via audio
63  * and audio drivers. The struct &i915_audio_component_ops @ops in it is
64  * defined in graphics driver and called in audio driver. The
204 			    "HDMI audio pixel clock setting for %d not found, falling back to defaults\n",
210 		    "Configuring HDMI audio for pixel clock %d (0x%08x)\n",
341 	struct i915_audio_component *acomp = i915->display.audio.component;
396 	mutex_lock(&i915->display.audio.mutex);
414 	/* Disable audio presence detect */
418 	mutex_unlock(&i915->display.audio.mutex);
537 	mutex_lock(&i915->display.audio.mutex);
543 	/* Enable audio presence detect */
554 	 * The audio componenent is used to convey the ELD
561 	mutex_unlock(&i915->display.audio.mutex);
605 	mutex_lock(&i915->display.audio.mutex);
620 	mutex_unlock(&i915->display.audio.mutex);
643 	mutex_lock(&i915->display.audio.mutex);
650 	 * The audio componenent is used to convey the ELD
663 	mutex_unlock(&i915->display.audio.mutex);
702  * intel_audio_codec_enable - Enable the audio codec for HD audio
703  * @encoder: encoder on which to enable audio
715 	struct i915_audio_component *acomp = i915->display.audio.component;
725 	drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s][ENCODER:%d:%s] Enable audio codec on [CRTC:%d:%s], %u bytes ELD\n",
731 	if (i915->display.funcs.audio)
732 		i915->display.funcs.audio->audio_codec_enable(encoder,
736 	mutex_lock(&i915->display.audio.mutex);
738 	audio_state = &i915->display.audio.state[cpu_transcoder];
744 	mutex_unlock(&i915->display.audio.mutex);
748 		/* audio drivers expect cpu_transcoder = -1 to indicate Non-MST cases */
761  * intel_audio_codec_disable - Disable the audio codec for HD audio
762  * @encoder: encoder on which to disable audio
774 	struct i915_audio_component *acomp = i915->display.audio.component;
784 	drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s][ENCODER:%d:%s] Disable audio codec on [CRTC:%d:%s]\n",
789 	if (i915->display.funcs.audio)
790 		i915->display.funcs.audio->audio_codec_disable(encoder,
794 	mutex_lock(&i915->display.audio.mutex);
796 	audio_state = &i915->display.audio.state[cpu_transcoder];
801 	mutex_unlock(&i915->display.audio.mutex);
805 		/* audio drivers expect cpu_transcoder = -1 to indicate Non-MST cases */
822 	mutex_lock(&i915->display.audio.mutex);
824 	audio_state = &i915->display.audio.state[cpu_transcoder];
829 	mutex_unlock(&i915->display.audio.mutex);
840 	if (i915->display.funcs.audio)
841 		i915->display.funcs.audio->audio_codec_get_config(encoder, crtc_state);
863  * intel_audio_hooks_init - Set up chip specific audio hooks
869 		i915->display.funcs.audio = &g4x_audio_funcs;
872 		i915->display.funcs.audio = &ibx_audio_funcs;
874 		i915->display.funcs.audio = &hsw_audio_funcs;
975 	if (i915->display.audio.power_refcount++ == 0) {
978 				       i915->display.audio.freq_cntrl);
981 				    i915->display.audio.freq_cntrl);
984 		/* Force CDCLK to 2*BCLK as long as we need audio powered. */
1001 	/* Stop forcing CDCLK to 2*BCLK if no need for audio to be powered. */
1002 	if (--i915->display.audio.power_refcount == 0)
1049  * get the intel audio state according to the parameter port and cpu_transcoder
1050  * MST & (cpu_transcoder >= 0): return the audio.state[cpu_transcoder].encoder],
1066 				cpu_transcoder >= ARRAY_SIZE(i915->display.audio.state)))
1069 		audio_state = &i915->display.audio.state[cpu_transcoder];
1085 		audio_state = &i915->display.audio.state[cpu_transcoder];
1100 	struct i915_audio_component *acomp = i915->display.audio.component;
1111 	mutex_lock(&i915->display.audio.mutex);
1132 	mutex_unlock(&i915->display.audio.mutex);
1145 	mutex_lock(&i915->display.audio.mutex);
1150 		mutex_unlock(&i915->display.audio.mutex);
1162 	mutex_unlock(&i915->display.audio.mutex);
1197 	i915->display.audio.component = acomp;
1212 	i915->display.audio.component = NULL;
1217 	if (i915->display.audio.power_refcount)
1218 		drm_err(&i915->drm, "audio power refcount %d after unbind\n",
1219 			i915->display.audio.power_refcount);
1237  * i915_audio_component_init - initialize and register the audio component
1250  * functionality (i.e. without HDMI audio).
1262 			"failed to add audio component (%d)\n", ret);
1283 		i915->display.audio.freq_cntrl = aud_freq;
1289 	i915->display.audio.component_registered = true;
1293  * i915_audio_component_cleanup - deregister the audio component
1296  * Deregisters the audio component, breaking any existing binding to the
1301 	if (!i915->display.audio.component_registered)
1305 	i915->display.audio.component_registered = false;
1309  * intel_audio_init() - Initialize the audio driver either using
1310  * component framework or using lpe audio bridge
1321  * intel_audio_deinit() - deinitialize the audio driver
1327 	if (i915->display.audio.lpe.platdev != NULL)