From 4620fd74a020dcbaed3303ff1dbef715fd02caad Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 4 Sep 2018 17:58:31 +0200
Subject: [PATCH] staging: bcm2835-audio: Remove redundant spdif stream ctls
Git-commit: 4620fd74a020dcbaed3303ff1dbef715fd02caad
Patch-mainline: v4.20-rc1
References: FATE#324827

The "IEC958 Playback Stream" control does basically the very same
thing as "IEC958 Playback Default" redundantly.  The former should
have been stream-specific and restored after closing the stream, but
we don't do in that way.

Since it's nothing but confusion, remove this fake.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/staging/vc04_services/bcm2835-audio/bcm2835-ctl.c |   51 --------------
 1 file changed, 51 deletions(-)

--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-ctl.c
+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-ctl.c
@@ -233,48 +233,6 @@ static int snd_bcm2835_spdif_mask_get(st
 	return 0;
 }
 
-static int snd_bcm2835_spdif_stream_info(struct snd_kcontrol *kcontrol,
-	struct snd_ctl_elem_info *uinfo)
-{
-	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
-	uinfo->count = 1;
-	return 0;
-}
-
-static int snd_bcm2835_spdif_stream_get(struct snd_kcontrol *kcontrol,
-	struct snd_ctl_elem_value *ucontrol)
-{
-	struct bcm2835_chip *chip = snd_kcontrol_chip(kcontrol);
-	int i;
-
-	mutex_lock(&chip->audio_mutex);
-
-	for (i = 0; i < 4; i++)
-		ucontrol->value.iec958.status[i] =
-		(chip->spdif_status >> (i * 8)) & 0xff;
-
-	mutex_unlock(&chip->audio_mutex);
-	return 0;
-}
-
-static int snd_bcm2835_spdif_stream_put(struct snd_kcontrol *kcontrol,
-	struct snd_ctl_elem_value *ucontrol)
-{
-	struct bcm2835_chip *chip = snd_kcontrol_chip(kcontrol);
-	unsigned int val = 0;
-	int i, change;
-
-	mutex_lock(&chip->audio_mutex);
-
-	for (i = 0; i < 4; i++)
-		val |= (unsigned int)ucontrol->value.iec958.status[i] << (i * 8);
-	change = val != chip->spdif_status;
-	chip->spdif_status = val;
-
-	mutex_unlock(&chip->audio_mutex);
-	return change;
-}
-
 static struct snd_kcontrol_new snd_bcm2835_spdif[] = {
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
@@ -290,15 +248,6 @@ static struct snd_kcontrol_new snd_bcm28
 		.info = snd_bcm2835_spdif_mask_info,
 		.get = snd_bcm2835_spdif_mask_get,
 	},
-	{
-		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
-		SNDRV_CTL_ELEM_ACCESS_INACTIVE,
-		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
-		.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, PCM_STREAM),
-		.info = snd_bcm2835_spdif_stream_info,
-		.get = snd_bcm2835_spdif_stream_get,
-		.put = snd_bcm2835_spdif_stream_put,
-	},
 };
 
 int snd_bcm2835_new_ctl(struct bcm2835_chip *chip)