1 // SPDX-License-Identifier: GPL-2.0
2 // hdac_component.c - routines for sync between HD-A core and DRM driver
9 #include <sound/core.h>
24  * snd_hdac_set_codec_wakeup - Enable / disable HDMI/DP codec wakeup
25  * @bus: HDA core bus
28  * This function is supposed to be used only by a HD-audio controller
38 	struct drm_audio_component *acomp = bus->audio_component;  in snd_hdac_set_codec_wakeup()
40 	if (!acomp || !acomp->ops)  in snd_hdac_set_codec_wakeup()
41 		return -ENODEV;  in snd_hdac_set_codec_wakeup()
43 	if (!acomp->ops->codec_wake_override)  in snd_hdac_set_codec_wakeup()
46 	dev_dbg(bus->dev, "%s codec wakeup\n", str_enable_disable(enable));  in snd_hdac_set_codec_wakeup()
48 	acomp->ops->codec_wake_override(acomp->dev, enable);  in snd_hdac_set_codec_wakeup()
55  * snd_hdac_display_power - Power up / down the power refcount
56  * @bus: HDA core bus
60  * This function is used by either HD-audio controller or codec driver that
68 	struct drm_audio_component *acomp = bus->audio_component;  in snd_hdac_display_power()
70 	dev_dbg(bus->dev, "display power %s\n", str_enable_disable(enable));  in snd_hdac_display_power()
72 	mutex_lock(&bus->lock);  in snd_hdac_display_power()
74 		set_bit(idx, &bus->display_power_status);  in snd_hdac_display_power()
76 		clear_bit(idx, &bus->display_power_status);  in snd_hdac_display_power()
78 	if (!acomp || !acomp->ops)  in snd_hdac_display_power()
81 	if (bus->display_power_status) {  in snd_hdac_display_power()
82 		if (!bus->display_power_active) {  in snd_hdac_display_power()
83 			unsigned long cookie = -1;  in snd_hdac_display_power()
85 			if (acomp->ops->get_power)  in snd_hdac_display_power()
86 				cookie = acomp->ops->get_power(acomp->dev);  in snd_hdac_display_power()
90 			bus->display_power_active = cookie;  in snd_hdac_display_power()
93 		if (bus->display_power_active) {  in snd_hdac_display_power()
94 			unsigned long cookie = bus->display_power_active;  in snd_hdac_display_power()
96 			if (acomp->ops->put_power)  in snd_hdac_display_power()
97 				acomp->ops->put_power(acomp->dev, cookie);  in snd_hdac_display_power()
99 			bus->display_power_active = 0;  in snd_hdac_display_power()
103 	mutex_unlock(&bus->lock);  in snd_hdac_display_power()
108  * snd_hdac_sync_audio_rate - Set N/CTS based on the sample rate
114  * This function is supposed to be used only by a HD-audio controller
123 	struct hdac_bus *bus = codec->bus;  in snd_hdac_sync_audio_rate()
124 	struct drm_audio_component *acomp = bus->audio_component;  in snd_hdac_sync_audio_rate()
127 	if (!acomp || !acomp->ops || !acomp->ops->sync_audio_rate)  in snd_hdac_sync_audio_rate()
128 		return -ENODEV;  in snd_hdac_sync_audio_rate()
130 	if (acomp->audio_ops && acomp->audio_ops->pin2port) {  in snd_hdac_sync_audio_rate()
131 		port = acomp->audio_ops->pin2port(codec, nid);  in snd_hdac_sync_audio_rate()
133 			return -EINVAL;  in snd_hdac_sync_audio_rate()
136 	return acomp->ops->sync_audio_rate(acomp->dev, port, pipe, rate);  in snd_hdac_sync_audio_rate()
141  * snd_hdac_acomp_get_eld - Get the audio state and ELD via component
145  * @audio_enabled: the pointer to store the current audio state
149  * This function is supposed to be used only by a HD-audio controller
152  * This function queries the current state of the audio on the given
164 	struct hdac_bus *bus = codec->bus;  in snd_hdac_acomp_get_eld()
165 	struct drm_audio_component *acomp = bus->audio_component;  in snd_hdac_acomp_get_eld()
168 	if (!acomp || !acomp->ops || !acomp->ops->get_eld)  in snd_hdac_acomp_get_eld()
169 		return -ENODEV;  in snd_hdac_acomp_get_eld()
172 	if (acomp->audio_ops && acomp->audio_ops->pin2port) {  in snd_hdac_acomp_get_eld()
173 		port = acomp->audio_ops->pin2port(codec, nid);  in snd_hdac_acomp_get_eld()
175 			return -EINVAL;  in snd_hdac_acomp_get_eld()
178 	return acomp->ops->get_eld(acomp->dev, port, pipe, audio_enabled,  in snd_hdac_acomp_get_eld()
189 		return -EINVAL;  in hdac_component_master_bind()
195 	if (WARN_ON(!(acomp->dev && acomp->ops))) {  in hdac_component_master_bind()
196 		ret = -EINVAL;  in hdac_component_master_bind()
201 	if (!try_module_get(acomp->ops->owner)) {  in hdac_component_master_bind()
202 		ret = -ENODEV;  in hdac_component_master_bind()
206 	if (acomp->audio_ops && acomp->audio_ops->master_bind) {  in hdac_component_master_bind()
207 		ret = acomp->audio_ops->master_bind(dev, acomp);  in hdac_component_master_bind()
212 	complete_all(&acomp->master_bind_complete);  in hdac_component_master_bind()
216 	module_put(acomp->ops->owner);  in hdac_component_master_bind()
219 	complete_all(&acomp->master_bind_complete);  in hdac_component_master_bind()
228 	if (acomp->audio_ops && acomp->audio_ops->master_unbind)  in hdac_component_master_unbind()
229 		acomp->audio_ops->master_unbind(dev, acomp);  in hdac_component_master_unbind()
230 	module_put(acomp->ops->owner);  in hdac_component_master_unbind()
232 	WARN_ON(acomp->ops || acomp->dev);  in hdac_component_master_unbind()
241  * snd_hdac_acomp_register_notifier - Register audio component ops
242  * @bus: HDA core bus
243  * @aops: audio component ops
245  * This function is supposed to be used only by a HD-audio controller
255 	if (!bus->audio_component)  in snd_hdac_acomp_register_notifier()
256 		return -ENODEV;  in snd_hdac_acomp_register_notifier()
258 	bus->audio_component->audio_ops = aops;  in snd_hdac_acomp_register_notifier()
264  * snd_hdac_acomp_init - Initialize audio component
265  * @bus: HDA core bus
266  * @aops: audio component ops
270  * This function is supposed to be used only by a HD-audio controller
273  * This function initializes and sets up the audio component to communicate
288 	struct device *dev = bus->dev;  in snd_hdac_acomp_init()
293 		return -EBUSY;  in snd_hdac_acomp_init()
298 		return -ENOMEM;  in snd_hdac_acomp_init()
299 	acomp->audio_ops = aops;  in snd_hdac_acomp_init()
300 	init_completion(&acomp->master_bind_complete);  in snd_hdac_acomp_init()
301 	bus->audio_component = acomp;  in snd_hdac_acomp_init()
313 	bus->audio_component = NULL;  in snd_hdac_acomp_init()
315 	dev_info(dev, "failed to add audio component master (%d)\n", ret);  in snd_hdac_acomp_init()
322  * snd_hdac_acomp_exit - Finalize audio component
323  * @bus: HDA core bus
325  * This function is supposed to be used only by a HD-audio controller
328  * This function releases the audio component that has been used.
334 	struct device *dev = bus->dev;  in snd_hdac_acomp_exit()
335 	struct drm_audio_component *acomp = bus->audio_component;  in snd_hdac_acomp_exit()
340 	if (WARN_ON(bus->display_power_active) && acomp->ops)  in snd_hdac_acomp_exit()
341 		acomp->ops->put_power(acomp->dev, bus->display_power_active);  in snd_hdac_acomp_exit()
343 	bus->display_power_active = 0;  in snd_hdac_acomp_exit()
344 	bus->display_power_status = 0;  in snd_hdac_acomp_exit()
348 	bus->audio_component = NULL;  in snd_hdac_acomp_exit()