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ASoC: wm97xx: Reset AC'97 device before registering it 

The wm97xx touchscreen driver binds itself to the snd_ac97 device that gets
registered by the CODEC driver and expects that the device has already been
reset. Before commit 6794f709b7 ("ASoC: ac97: Drop delayed device
registration") the device was only registered after the probe function of
the CODEC driver had finished running, but starting with the mentioned
commit the device is registered as soon as snd_soc_new_ac97_codec() is
called. This causes the touchscreen driver to no longer work. Modify the
CODEC drivers to use snd_soc_alloc_ac97_codec() instead of
snd_soc_new_ac97_codec() and make sure that the AC'97 device is reset before
the snd_ac97 device gets registered.

Fixes: 6794f709b7 ("ASoC: ac97: Drop delayed device registration")
Reported-by: Manuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Tested-by: Manuel Lauss <manuel.lauss@gmail.com>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
This commit is contained in:
Lars-Peter Clausen 2015-01-23 16:21:37 +01:00 committed by Mark Brown
parent 47e039413c
commit f8d71be555
3 changed files with 26 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
sound/soc/codecs/wm9705.c
View File

@ -344,23 +344,27 @@ static int wm9705_soc_probe(struct snd_soc_codec *codec)
struct snd_ac97 *ac97;
int ret = 0;
ac97 = snd_soc_new_ac97_codec(codec);
ac97 = snd_soc_alloc_ac97_codec(codec);
if (IS_ERR(ac97)) {
ret = PTR_ERR(ac97);
dev_err(codec->dev, "Failed to register AC97 codec\n");
return ret;
}
snd_soc_codec_set_drvdata(codec, ac97);
ret = wm9705_reset(codec);
if (ret)
goto reset_err;
goto err_put_device;
ret = device_add(&ac97->dev);
if (ret)
goto err_put_device;
snd_soc_codec_set_drvdata(codec, ac97);
return 0;
reset_err:
snd_soc_free_ac97_codec(ac97);
err_put_device:
put_device(&ac97->dev);
return ret;
}

12
sound/soc/codecs/wm9712.c
View File

@ -666,7 +666,7 @@ static int wm9712_soc_probe(struct snd_soc_codec *codec)
struct wm9712_priv *wm9712 = snd_soc_codec_get_drvdata(codec);
int ret = 0;
wm9712->ac97 = snd_soc_new_ac97_codec(codec);
wm9712->ac97 = snd_soc_alloc_ac97_codec(codec);
if (IS_ERR(wm9712->ac97)) {
ret = PTR_ERR(wm9712->ac97);
dev_err(codec->dev, "Failed to register AC97 codec: %d\n", ret);
@ -675,15 +675,19 @@ static int wm9712_soc_probe(struct snd_soc_codec *codec)
ret = wm9712_reset(codec, 0);
if (ret < 0)
goto reset_err;
goto err_put_device;
ret = device_add(&wm9712->ac97->dev);
if (ret)
goto err_put_device;
/* set alc mux to none */
ac97_write(codec, AC97_VIDEO, ac97_read(codec, AC97_VIDEO) | 0x3000);
return 0;
reset_err:
snd_soc_free_ac97_codec(wm9712->ac97);
err_put_device:
put_device(&wm9712->ac97->dev);
return ret;
}

12
sound/soc/codecs/wm9713.c
View File

@ -1225,7 +1225,7 @@ static int wm9713_soc_probe(struct snd_soc_codec *codec)
struct wm9713_priv *wm9713 = snd_soc_codec_get_drvdata(codec);
int ret = 0, reg;
wm9713->ac97 = snd_soc_new_ac97_codec(codec);
wm9713->ac97 = snd_soc_alloc_ac97_codec(codec);
if (IS_ERR(wm9713->ac97))
return PTR_ERR(wm9713->ac97);
@ -1234,7 +1234,11 @@ static int wm9713_soc_probe(struct snd_soc_codec *codec)
wm9713_reset(codec, 0);
ret = wm9713_reset(codec, 1);
if (ret < 0)
goto reset_err;
goto err_put_device;
ret = device_add(&wm9713->ac97->dev);
if (ret)
goto err_put_device;
/* unmute the adc - move to kcontrol */
reg = ac97_read(codec, AC97_CD) & 0x7fff;
@ -1242,8 +1246,8 @@ static int wm9713_soc_probe(struct snd_soc_codec *codec)
return 0;
reset_err:
snd_soc_free_ac97_codec(wm9713->ac97);
err_put_device:
put_device(&wm9713->ac97->dev);
return ret;
}