Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * media.c - Media Controller specific ALSA driver code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (c) 2019 Shuah Khan <shuah@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * This file adds Media Controller support to the ALSA driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * to use the Media Controller API to share the tuner with DVB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * and V4L2 drivers that control the media device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * The media device is created based on the existing quirks framework.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * Using this approach, the media controller API usage can be added for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * a specific device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/usb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <sound/pcm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <sound/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include "usbaudio.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include "card.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include "mixer.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include "media.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) int snd_media_stream_init(struct snd_usb_substream *subs, struct snd_pcm *pcm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 			  int stream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	struct media_device *mdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	struct media_ctl *mctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	struct device *pcm_dev = &pcm->streams[stream].dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	u32 intf_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	u16 mixer_pad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	struct media_entity *entity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	mdev = subs->stream->chip->media_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	if (!mdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	if (subs->media_ctl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	/* allocate media_ctl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	mctl = kzalloc(sizeof(*mctl), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	if (!mctl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	mctl->media_dev = mdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		intf_type = MEDIA_INTF_T_ALSA_PCM_PLAYBACK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		mctl->media_entity.function = MEDIA_ENT_F_AUDIO_PLAYBACK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		mctl->media_pad.flags = MEDIA_PAD_FL_SOURCE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		mixer_pad = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		intf_type = MEDIA_INTF_T_ALSA_PCM_CAPTURE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		mctl->media_entity.function = MEDIA_ENT_F_AUDIO_CAPTURE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		mctl->media_pad.flags = MEDIA_PAD_FL_SINK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		mixer_pad = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	mctl->media_entity.name = pcm->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	media_entity_pads_init(&mctl->media_entity, 1, &mctl->media_pad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	ret =  media_device_register_entity(mctl->media_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 					    &mctl->media_entity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		goto free_mctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	mctl->intf_devnode = media_devnode_create(mdev, intf_type, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 						  MAJOR(pcm_dev->devt),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 						  MINOR(pcm_dev->devt));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	if (!mctl->intf_devnode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		goto unregister_entity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	mctl->intf_link = media_create_intf_link(&mctl->media_entity,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 						 &mctl->intf_devnode->intf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 						 MEDIA_LNK_FL_ENABLED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	if (!mctl->intf_link) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		goto devnode_remove;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	/* create link between mixer and audio */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	media_device_for_each_entity(entity, mdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		switch (entity->function) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		case MEDIA_ENT_F_AUDIO_MIXER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 			ret = media_create_pad_link(entity, mixer_pad,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 						    &mctl->media_entity, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 						    MEDIA_LNK_FL_ENABLED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 			if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 				goto remove_intf_link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	subs->media_ctl = mctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) remove_intf_link:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	media_remove_intf_link(mctl->intf_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) devnode_remove:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	media_devnode_remove(mctl->intf_devnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) unregister_entity:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	media_device_unregister_entity(&mctl->media_entity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) free_mctl:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	kfree(mctl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) void snd_media_stream_delete(struct snd_usb_substream *subs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	struct media_ctl *mctl = subs->media_ctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	if (mctl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		struct media_device *mdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		mdev = mctl->media_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		if (mdev && media_devnode_is_registered(mdev->devnode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 			media_devnode_remove(mctl->intf_devnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 			media_device_unregister_entity(&mctl->media_entity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			media_entity_cleanup(&mctl->media_entity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		kfree(mctl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		subs->media_ctl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) int snd_media_start_pipeline(struct snd_usb_substream *subs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	struct media_ctl *mctl = subs->media_ctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	if (!mctl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	mutex_lock(&mctl->media_dev->graph_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	if (mctl->media_dev->enable_source)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		ret = mctl->media_dev->enable_source(&mctl->media_entity,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 						     &mctl->media_pipe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	mutex_unlock(&mctl->media_dev->graph_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) void snd_media_stop_pipeline(struct snd_usb_substream *subs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	struct media_ctl *mctl = subs->media_ctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	if (!mctl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	mutex_lock(&mctl->media_dev->graph_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	if (mctl->media_dev->disable_source)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		mctl->media_dev->disable_source(&mctl->media_entity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	mutex_unlock(&mctl->media_dev->graph_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static int snd_media_mixer_init(struct snd_usb_audio *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	struct device *ctl_dev = &chip->card->ctl_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	struct media_intf_devnode *ctl_intf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	struct usb_mixer_interface *mixer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	struct media_device *mdev = chip->media_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	struct media_mixer_ctl *mctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	u32 intf_type = MEDIA_INTF_T_ALSA_CONTROL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	if (!mdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	ctl_intf = chip->ctl_intf_media_devnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	if (!ctl_intf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		ctl_intf = media_devnode_create(mdev, intf_type, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 						MAJOR(ctl_dev->devt),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 						MINOR(ctl_dev->devt));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		if (!ctl_intf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 			return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		chip->ctl_intf_media_devnode = ctl_intf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	list_for_each_entry(mixer, &chip->mixer_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		if (mixer->media_mixer_ctl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		/* allocate media_mixer_ctl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		mctl = kzalloc(sizeof(*mctl), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		if (!mctl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 			return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		mctl->media_dev = mdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		mctl->media_entity.function = MEDIA_ENT_F_AUDIO_MIXER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		mctl->media_entity.name = chip->card->mixername;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		mctl->media_pad[0].flags = MEDIA_PAD_FL_SINK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		mctl->media_pad[1].flags = MEDIA_PAD_FL_SOURCE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		mctl->media_pad[2].flags = MEDIA_PAD_FL_SOURCE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		media_entity_pads_init(&mctl->media_entity, MEDIA_MIXER_PAD_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 				  mctl->media_pad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		ret =  media_device_register_entity(mctl->media_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 						    &mctl->media_entity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 			kfree(mctl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		mctl->intf_link = media_create_intf_link(&mctl->media_entity,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 							 &ctl_intf->intf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 							 MEDIA_LNK_FL_ENABLED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		if (!mctl->intf_link) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 			media_device_unregister_entity(&mctl->media_entity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 			media_entity_cleanup(&mctl->media_entity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 			kfree(mctl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 			return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		mctl->intf_devnode = ctl_intf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		mixer->media_mixer_ctl = mctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) static void snd_media_mixer_delete(struct snd_usb_audio *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	struct usb_mixer_interface *mixer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	struct media_device *mdev = chip->media_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	if (!mdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	list_for_each_entry(mixer, &chip->mixer_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		struct media_mixer_ctl *mctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		mctl = mixer->media_mixer_ctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		if (!mixer->media_mixer_ctl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		if (media_devnode_is_registered(mdev->devnode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 			media_device_unregister_entity(&mctl->media_entity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 			media_entity_cleanup(&mctl->media_entity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		kfree(mctl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		mixer->media_mixer_ctl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	if (media_devnode_is_registered(mdev->devnode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		media_devnode_remove(chip->ctl_intf_media_devnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	chip->ctl_intf_media_devnode = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) int snd_media_device_create(struct snd_usb_audio *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 			struct usb_interface *iface)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	struct media_device *mdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	struct usb_device *usbdev = interface_to_usbdev(iface);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	/* usb-audio driver is probed for each usb interface, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	 * there are multiple interfaces per device. Avoid calling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	 * media_device_usb_allocate() each time usb_audio_probe()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	 * is called. Do it only once.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	if (chip->media_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		mdev = chip->media_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		goto snd_mixer_init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	mdev = media_device_usb_allocate(usbdev, KBUILD_MODNAME, THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	if (IS_ERR(mdev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	/* save media device - avoid lookups */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	chip->media_dev = mdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) snd_mixer_init:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	/* Create media entities for mixer and control dev */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	ret = snd_media_mixer_init(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	/* media_device might be registered, print error and continue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		dev_err(&usbdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 			"Couldn't create media mixer entities. Error: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 			ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	if (!media_devnode_is_registered(mdev->devnode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		/* dont'register if snd_media_mixer_init() failed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 			goto create_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 		/* register media_device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		ret = media_device_register(mdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) create_fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 		if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 			snd_media_mixer_delete(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 			media_device_delete(mdev, KBUILD_MODNAME, THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 			/* clear saved media_dev */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 			chip->media_dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 			dev_err(&usbdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 				"Couldn't register media device. Error: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 				ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) void snd_media_device_delete(struct snd_usb_audio *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	struct media_device *mdev = chip->media_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	struct snd_usb_stream *stream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	/* release resources */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	list_for_each_entry(stream, &chip->pcm_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		snd_media_stream_delete(&stream->substream[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 		snd_media_stream_delete(&stream->substream[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	snd_media_mixer_delete(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	if (mdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 		media_device_delete(mdev, KBUILD_MODNAME, THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 		chip->media_dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) }