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ALSA: hda: check stream decoupled register state

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Check stream decoupled register value with requested value
before decoupling/coupling the stream.

Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jeeja KP 2017-01-02 12:44:28 +05:30 committed by Mark Brown
parent a5de5b74a5
commit 09a8bf812c
1 changed files with 9 additions and 6 deletions
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15
sound/hda/ext/hdac_ext_stream.c
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@ -128,14 +128,17 @@ void snd_hdac_ext_stream_decouple(struct hdac_ext_bus *ebus,
{
struct hdac_stream *hstream = &stream->hstream;
struct hdac_bus *bus = &ebus->bus;
u32 val;
int mask = AZX_PPCTL_PROCEN(hstream->index);
spin_lock_irq(&bus->reg_lock);
if (decouple)
snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, 0,
AZX_PPCTL_PROCEN(hstream->index));
else
snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL,
AZX_PPCTL_PROCEN(hstream->index), 0);
val = readw(bus->ppcap + AZX_REG_PP_PPCTL) & mask;
if (decouple && !val)
snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, mask, mask);
else if (!decouple && val)
snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, mask, 0);
stream->decoupled = decouple;
spin_unlock_irq(&bus->reg_lock);
}