1 // SPDX-License-Identifier: GPL-2.0
2 // hdac_component.c - routines for sync between HD-A core and DRM driver
23  * snd_hdac_set_codec_wakeup - Enable / disable HDMI/DP codec wakeup
27  * This function is supposed to be used only by a HD-audio controller
28  * driver that needs the interaction with graphics driver.
37 	struct drm_audio_component *acomp = bus->audio_component;  in snd_hdac_set_codec_wakeup()
39 	if (!acomp || !acomp->ops)  in snd_hdac_set_codec_wakeup()
40 		return -ENODEV;  in snd_hdac_set_codec_wakeup()
42 	if (!acomp->ops->codec_wake_override)  in snd_hdac_set_codec_wakeup()
45 	dev_dbg(bus->dev, "%s codec wakeup\n",  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
57  * @idx: HDA codec address, pass HDA_CODEC_IDX_CONTROLLER for controller
60  * This function is used by either HD-audio controller or codec driver that
61  * needs the interaction with graphics driver.
64  * put_power() ops accordingly, toggling the codec wakeup, too.
68 	struct drm_audio_component *acomp = bus->audio_component;  in snd_hdac_display_power()
70 	dev_dbg(bus->dev, "display power %s\n",  in snd_hdac_display_power()
73 	mutex_lock(&bus->lock);  in snd_hdac_display_power()
75 		set_bit(idx, &bus->display_power_status);  in snd_hdac_display_power()
77 		clear_bit(idx, &bus->display_power_status);  in snd_hdac_display_power()
79 	if (!acomp || !acomp->ops)  in snd_hdac_display_power()
82 	if (bus->display_power_status) {  in snd_hdac_display_power()
83 		if (!bus->display_power_active) {  in snd_hdac_display_power()
84 			unsigned long cookie = -1;  in snd_hdac_display_power()
86 			if (acomp->ops->get_power)  in snd_hdac_display_power()
87 				cookie = acomp->ops->get_power(acomp->dev);  in snd_hdac_display_power()
91 			bus->display_power_active = cookie;  in snd_hdac_display_power()
94 		if (bus->display_power_active) {  in snd_hdac_display_power()
95 			unsigned long cookie = bus->display_power_active;  in snd_hdac_display_power()
97 			if (acomp->ops->put_power)  in snd_hdac_display_power()
98 				acomp->ops->put_power(acomp->dev, cookie);  in snd_hdac_display_power()
100 			bus->display_power_active = 0;  in snd_hdac_display_power()
104 	mutex_unlock(&bus->lock);  in snd_hdac_display_power()
109  * snd_hdac_sync_audio_rate - Set N/CTS based on the sample rate
110  * @codec: HDA codec
115  * This function is supposed to be used only by a HD-audio controller
116  * driver that needs the interaction with graphics driver.
121 int snd_hdac_sync_audio_rate(struct hdac_device *codec, hda_nid_t nid,  in snd_hdac_sync_audio_rate()  argument
124 	struct hdac_bus *bus = codec->bus;  in snd_hdac_sync_audio_rate()
125 	struct drm_audio_component *acomp = bus->audio_component;  in snd_hdac_sync_audio_rate()
128 	if (!acomp || !acomp->ops || !acomp->ops->sync_audio_rate)  in snd_hdac_sync_audio_rate()
129 		return -ENODEV;  in snd_hdac_sync_audio_rate()
131 	if (acomp->audio_ops && acomp->audio_ops->pin2port) {  in snd_hdac_sync_audio_rate()
132 		port = acomp->audio_ops->pin2port(codec, nid);  in snd_hdac_sync_audio_rate()
134 			return -EINVAL;  in snd_hdac_sync_audio_rate()
137 	return acomp->ops->sync_audio_rate(acomp->dev, port, pipe, rate);  in snd_hdac_sync_audio_rate()
142  * snd_hdac_acomp_get_eld - Get the audio state and ELD via component
143  * @codec: HDA codec
150  * This function is supposed to be used only by a HD-audio controller
151  * driver that needs the interaction with graphics driver.
162 int snd_hdac_acomp_get_eld(struct hdac_device *codec, hda_nid_t nid, int dev_id,  in snd_hdac_acomp_get_eld()  argument
165 	struct hdac_bus *bus = codec->bus;  in snd_hdac_acomp_get_eld()
166 	struct drm_audio_component *acomp = bus->audio_component;  in snd_hdac_acomp_get_eld()
169 	if (!acomp || !acomp->ops || !acomp->ops->get_eld)  in snd_hdac_acomp_get_eld()
170 		return -ENODEV;  in snd_hdac_acomp_get_eld()
173 	if (acomp->audio_ops && acomp->audio_ops->pin2port) {  in snd_hdac_acomp_get_eld()
174 		port = acomp->audio_ops->pin2port(codec, nid);  in snd_hdac_acomp_get_eld()
176 			return -EINVAL;  in snd_hdac_acomp_get_eld()
179 	return acomp->ops->get_eld(acomp->dev, port, pipe, audio_enabled,  in snd_hdac_acomp_get_eld()
190 		return -EINVAL;  in hdac_component_master_bind()
196 	if (WARN_ON(!(acomp->dev && acomp->ops))) {  in hdac_component_master_bind()
197 		ret = -EINVAL;  in hdac_component_master_bind()
202 	if (!try_module_get(acomp->ops->owner)) {  in hdac_component_master_bind()
203 		ret = -ENODEV;  in hdac_component_master_bind()
207 	if (acomp->audio_ops && acomp->audio_ops->master_bind) {  in hdac_component_master_bind()
208 		ret = acomp->audio_ops->master_bind(dev, acomp);  in hdac_component_master_bind()
213 	complete_all(&acomp->master_bind_complete);  in hdac_component_master_bind()
217 	module_put(acomp->ops->owner);  in hdac_component_master_bind()
220 	complete_all(&acomp->master_bind_complete);  in hdac_component_master_bind()
229 	if (acomp->audio_ops && acomp->audio_ops->master_unbind)  in hdac_component_master_unbind()
230 		acomp->audio_ops->master_unbind(dev, acomp);  in hdac_component_master_unbind()
231 	module_put(acomp->ops->owner);  in hdac_component_master_unbind()
233 	WARN_ON(acomp->ops || acomp->dev);  in hdac_component_master_unbind()
242  * snd_hdac_acomp_register_notifier - Register audio component ops
246  * This function is supposed to be used only by a HD-audio controller
247  * driver that needs the interaction with graphics driver.
249  * This function sets the given ops to be called by the graphics driver.
256 	if (!bus->audio_component)  in snd_hdac_acomp_register_notifier()
257 		return -ENODEV;  in snd_hdac_acomp_register_notifier()
259 	bus->audio_component->audio_ops = aops;  in snd_hdac_acomp_register_notifier()
265  * snd_hdac_acomp_init - Initialize audio component
271  * This function is supposed to be used only by a HD-audio controller
272  * driver that needs the interaction with graphics driver.
275  * with graphics driver.
289 	struct device *dev = bus->dev;  in snd_hdac_acomp_init()
294 		return -EBUSY;  in snd_hdac_acomp_init()
299 		return -ENOMEM;  in snd_hdac_acomp_init()
300 	acomp->audio_ops = aops;  in snd_hdac_acomp_init()
301 	init_completion(&acomp->master_bind_complete);  in snd_hdac_acomp_init()
302 	bus->audio_component = acomp;  in snd_hdac_acomp_init()
314 	bus->audio_component = NULL;  in snd_hdac_acomp_init()
323  * snd_hdac_acomp_exit - Finalize audio component
326  * This function is supposed to be used only by a HD-audio controller
327  * driver that needs the interaction with graphics driver.
335 	struct device *dev = bus->dev;  in snd_hdac_acomp_exit()
336 	struct drm_audio_component *acomp = bus->audio_component;  in snd_hdac_acomp_exit()
341 	if (WARN_ON(bus->display_power_active) && acomp->ops)  in snd_hdac_acomp_exit()
342 		acomp->ops->put_power(acomp->dev, bus->display_power_active);  in snd_hdac_acomp_exit()
344 	bus->display_power_active = 0;  in snd_hdac_acomp_exit()
345 	bus->display_power_status = 0;  in snd_hdac_acomp_exit()
349 	bus->audio_component = NULL;  in snd_hdac_acomp_exit()