31  * DOC: LPE Audio integration for HDMI or DP playback
36  * mode is unrelated to the LPE aka SST audio engine, the documentation refers
41  * subsystems, a bridge is setup between the hdmi-lpe-audio and i915:
44  * 3. Create IRQ chip to forward the LPE audio irqs.
45  * the hdmi-lpe-audio driver probes the lpe audio device and creates a new
50  * uninstall the hdmi-lpe-audio driver before uninstalling i915 module,
52  * platform device: even though hdmi-lpe-audio driver is released, the modules
58  * When forwarding LPE audio irqs, the flow control handler selection depends
78 #define HAS_LPE_AUDIO(dev_priv) ((dev_priv)->display.audio.lpe.platdev != NULL)
100 	rsc[0].start    = rsc[0].end = dev_priv->display.audio.lpe.irq;  in lpe_audio_platdev_create()
102 	rsc[0].name     = "hdmi-lpe-audio-irq";  in lpe_audio_platdev_create()
109 	rsc[1].name     = "hdmi-lpe-audio-mmio";  in lpe_audio_platdev_create()
112 	pinfo.name = "hdmi-lpe-audio";  in lpe_audio_platdev_create()
133 			"Failed to allocate LPE audio platform device\n");  in lpe_audio_platdev_create()
152 	platform_device_unregister(dev_priv->display.audio.lpe.platdev);  in lpe_audio_platdev_destroy()
171 	int irq = dev_priv->display.audio.lpe.irq;  in lpe_audio_irq_init()
197 				 "HDaudio controller not detected, using LPE audio instead\n");  in lpe_audio_detect()
208 	dev_priv->display.audio.lpe.irq = irq_alloc_desc(0);  in lpe_audio_setup()
209 	if (dev_priv->display.audio.lpe.irq < 0) {  in lpe_audio_setup()
211 			dev_priv->display.audio.lpe.irq);  in lpe_audio_setup()
212 		ret = dev_priv->display.audio.lpe.irq;  in lpe_audio_setup()
216 	drm_dbg(&dev_priv->drm, "irq = %d\n", dev_priv->display.audio.lpe.irq);  in lpe_audio_setup()
222 			"Failed to initialize irqchip for lpe audio: %d\n",  in lpe_audio_setup()
227 	dev_priv->display.audio.lpe.platdev = lpe_audio_platdev_create(dev_priv);  in lpe_audio_setup()
229 	if (IS_ERR(dev_priv->display.audio.lpe.platdev)) {  in lpe_audio_setup()
230 		ret = PTR_ERR(dev_priv->display.audio.lpe.platdev);  in lpe_audio_setup()
232 			"Failed to create lpe audio platform device: %d\n",  in lpe_audio_setup()
245 	irq_free_desc(dev_priv->display.audio.lpe.irq);  in lpe_audio_setup()
247 	dev_priv->display.audio.lpe.irq = -1;  in lpe_audio_setup()
248 	dev_priv->display.audio.lpe.platdev = NULL;  in lpe_audio_setup()
253  * intel_lpe_audio_irq_handler() - forwards the LPE audio irq
256  * the LPE Audio irq is forwarded to the irq handler registered by LPE audio
266 	ret = generic_handle_irq(dev_priv->display.audio.lpe.irq);  in intel_lpe_audio_irq_handler()
269 				    "error handling LPE audio irq: %d\n", ret);  in intel_lpe_audio_irq_handler()
273  * intel_lpe_audio_init() - detect and setup the bridge between HDMI LPE Audio
288 				"failed to setup LPE Audio bridge\n");  in intel_lpe_audio_init()
295  * audio driver and i915
298  * release all the resources for LPE audio <-> i915 bridge.
307 	irq_free_desc(dev_priv->display.audio.lpe.irq);  in intel_lpe_audio_teardown()
309 	dev_priv->display.audio.lpe.irq = -1;  in intel_lpe_audio_teardown()
310 	dev_priv->display.audio.lpe.platdev = NULL;  in intel_lpe_audio_teardown()
314  * intel_lpe_audio_notify() - notify lpe audio event
315  * audio driver and i915
323  * Notify lpe audio driver of eld change.
337 	pdata = dev_get_platdata(&dev_priv->display.audio.lpe.platdev->dev);  in intel_lpe_audio_notify()
365 		pdata->notify_audio_lpe(dev_priv->display.audio.lpe.platdev, port - PORT_B);  in intel_lpe_audio_notify()