Commit 09a8bf81 authored by Jeeja KP's avatar Jeeja KP Committed by Mark Brown
Browse files

ALSA: hda: check stream decoupled register state 



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

Signed-off-by: default avatarJeeja KP <jeeja.kp@intel.com>
Acked-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent a5de5b74

sound/hda/ext/hdac_ext_stream.c

+9 −6
Original line number Diff line number Diff line
@@ -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);

}