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Commit e7a3484d authored by Vinod Koul's avatar Vinod Koul Committed by Takashi Iwai
Browse files

ALSA: hda: add hdac_ext stream creation and cleanup routines 



HDAC extended core should create streams for an extended bus and also free
up those on cleanup. So introduce snd_hdac_ext_stream_init_all and
snd_hdac_stream_free_all routines

Signed-off-by: default avatarJeeja KP <jeeja.kp@intel.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent d39513f8

include/sound/hdaudio_ext.h

+3 −0
Original line number Diff line number Diff line
@@ -87,6 +87,9 @@ struct hdac_ext_stream { 
void snd_hdac_ext_stream_init(struct hdac_ext_bus *bus,

				struct hdac_ext_stream *stream, int idx,

				int direction, int tag);

int snd_hdac_ext_stream_init_all(struct hdac_ext_bus *ebus, int start_idx,

		int num_stream, int dir);

void snd_hdac_stream_free_all(struct hdac_ext_bus *ebus);

struct hdac_ext_stream *snd_hdac_ext_stream_assign(struct hdac_ext_bus *bus,

					   struct snd_pcm_substream *substream,

					   int type);

sound/hda/ext/hdac_ext_stream.c

+50 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
 */



#include <linux/delay.h>

#include <linux/slab.h>

#include <sound/pcm.h>

#include <sound/hda_register.h>

#include <sound/hdaudio_ext.h>
@@ -53,6 +54,55 @@ void snd_hdac_ext_stream_init(struct hdac_ext_bus *ebus, 
}

EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init);



/**

 * snd_hdac_ext_stream_init_all - create and initialize the stream objects

 *   for an extended hda bus

 * @ebus: HD-audio ext core bus

 * @start_idx: start index for streams

 * @num_stream: number of streams to initialize

 * @dir: direction of streams

 */

int snd_hdac_ext_stream_init_all(struct hdac_ext_bus *ebus, int start_idx,

		int num_stream, int dir)

{

	int stream_tag = 0;

	int i, tag, idx = start_idx;



	for (i = 0; i < num_stream; i++) {

		struct hdac_ext_stream *stream =

				kzalloc(sizeof(*stream), GFP_KERNEL);

		if (!stream)

			return -ENOMEM;

		tag = ++stream_tag;

		snd_hdac_ext_stream_init(ebus, stream, idx, dir, tag);

		idx++;

	}



	return 0;



}

EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init_all);



/**

 * snd_hdac_stream_free_all - free hdac extended stream objects

 *

 * @ebus: HD-audio ext core bus

 */

void snd_hdac_stream_free_all(struct hdac_ext_bus *ebus)

{

	struct hdac_stream *s;

	struct hdac_ext_stream *stream;

	struct hdac_bus *bus = ebus_to_hbus(ebus);



	while (!list_empty(&bus->stream_list)) {

		s = list_first_entry(&bus->stream_list, struct hdac_stream, list);

		stream = stream_to_hdac_ext_stream(s);

		list_del(&s->list);

		kfree(stream);

	}

}

EXPORT_SYMBOL_GPL(snd_hdac_stream_free_all);



/**

 * snd_hdac_ext_stream_decouple - decouple the hdac stream

 * @ebus: HD-audio ext core bus