Commit b3ac5636 authored by Takashi Iwai's avatar Takashi Iwai Committed by Jaroslav Kysela
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[ALSA] hda-codec - introduce command register cache 



This patch adds the cache for codec command registers.
snd_hda_codec_write_cache() and snd_hda_sequence_write_cache() do
the write operations with caching, which values can be resumed via
snd_hda_codec_resume_cache().
The patch introduces only the framework, and no codec code is using
this cache yet.  It'll be implemented in the following patch.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarJaroslav Kysela <perex@suse.cz>
parent 01751f54

sound/pci/hda/hda_codec.c

+91 −0
Original line number Diff line number Diff line
@@ -510,6 +510,7 @@ static void snd_hda_codec_free(struct hda_codec *codec) 
	if (codec->patch_ops.free)

		codec->patch_ops.free(codec);

	free_hda_cache(&codec->amp_cache);

	free_hda_cache(&codec->cmd_cache);

	kfree(codec->wcaps);

	kfree(codec);

}
@@ -548,6 +549,7 @@ int __devinit snd_hda_codec_new(struct hda_bus *bus, unsigned int codec_addr, 
	codec->addr = codec_addr;

	mutex_init(&codec->spdif_mutex);

	init_hda_cache(&codec->amp_cache, sizeof(struct hda_amp_info));

	init_hda_cache(&codec->cmd_cache, sizeof(struct hda_cache_head));



	list_add_tail(&codec->list, &bus->codec_list);

	bus->caddr_tbl[codec_addr] = codec;
@@ -840,6 +842,29 @@ int snd_hda_codec_amp_update(struct hda_codec *codec, hda_nid_t nid, int ch, 
	return 1;

}



/* resume the all amp commands from the cache */

void snd_hda_codec_resume_amp(struct hda_codec *codec)

{

	struct hda_amp_info *buffer = codec->amp_cache.buffer;

	int i;



	for (i = 0; i < codec->amp_cache.size; i++, buffer++) {

		u32 key = buffer->head.key;

		hda_nid_t nid;

		unsigned int idx, dir, ch;

		if (!key)

			continue;

		nid = key & 0xff;

		idx = (key >> 16) & 0xff;

		dir = (key >> 24) & 0xff;

		for (ch = 0; ch < 2; ch++) {

			if (!(buffer->head.val & INFO_AMP_VOL(ch)))

				continue;

			put_vol_mute(codec, buffer, nid, ch, dir, idx,

				     buffer->vol[ch]);

		}

	}

}



/*

 * AMP control callbacks
@@ -1458,6 +1483,72 @@ int snd_hda_create_spdif_in_ctls(struct hda_codec *codec, hda_nid_t nid) 
}





/* build a 32bit cache key with the widget id and the command parameter */

#define build_cmd_cache_key(nid, verb)	((verb << 8) | nid)

#define get_cmd_cache_nid(key)		((key) & 0xff)

#define get_cmd_cache_cmd(key)		(((key) >> 8) & 0xffff)



/**

 * snd_hda_codec_write_cache - send a single command with caching

 * @codec: the HDA codec

 * @nid: NID to send the command

 * @direct: direct flag

 * @verb: the verb to send

 * @parm: the parameter for the verb

 *

 * Send a single command without waiting for response.

 *

 * Returns 0 if successful, or a negative error code.

 */

int snd_hda_codec_write_cache(struct hda_codec *codec, hda_nid_t nid,

			      int direct, unsigned int verb, unsigned int parm)

{

	int err;

	mutex_lock(&codec->bus->cmd_mutex);

	err = codec->bus->ops.command(codec, nid, direct, verb, parm);

	if (!err) {

		struct hda_cache_head *c;

		u32 key = build_cmd_cache_key(nid, verb);

		c = get_alloc_hash(&codec->cmd_cache, key);

		if (c)

			c->val = parm;

	}

	mutex_unlock(&codec->bus->cmd_mutex);

	return err;

}



/* resume the all commands from the cache */

void snd_hda_codec_resume_cache(struct hda_codec *codec)

{

	struct hda_cache_head *buffer = codec->cmd_cache.buffer;

	int i;



	for (i = 0; i < codec->cmd_cache.size; i++, buffer++) {

		u32 key = buffer->key;

		if (!key)

			continue;

		snd_hda_codec_write(codec, get_cmd_cache_nid(key), 0,

				    get_cmd_cache_cmd(key), buffer->val);

	}

}



/**

 * snd_hda_sequence_write_cache - sequence writes with caching

 * @codec: the HDA codec

 * @seq: VERB array to send

 *

 * Send the commands sequentially from the given array.

 * Thte commands are recorded on cache for power-save and resume.

 * The array must be terminated with NID=0.

 */

void snd_hda_sequence_write_cache(struct hda_codec *codec,

				  const struct hda_verb *seq)

{

	for (; seq->nid; seq++)

		snd_hda_codec_write_cache(codec, seq->nid, 0, seq->verb,

					  seq->param);

}



/*

 * set power state of the codec

 */

sound/pci/hda/hda_codec.h

+8 −0
Original line number Diff line number Diff line
@@ -570,6 +570,7 @@ struct hda_codec { 
	u32 *wcaps;



	struct hda_cache_rec amp_cache;	/* cache for amp access */

	struct hda_cache_rec cmd_cache;	/* cache for other commands */



	struct mutex spdif_mutex;

	unsigned int spdif_status;	/* IEC958 status bits */
@@ -620,6 +621,13 @@ void snd_hda_sequence_write(struct hda_codec *codec, 
/* unsolicited event */

int snd_hda_queue_unsol_event(struct hda_bus *bus, u32 res, u32 res_ex);



/* cached write */

int snd_hda_codec_write_cache(struct hda_codec *codec, hda_nid_t nid,

			      int direct, unsigned int verb, unsigned int parm);

void snd_hda_sequence_write_cache(struct hda_codec *codec,

				  const struct hda_verb *seq);

void snd_hda_codec_resume_cache(struct hda_codec *codec);



/*

 * Mixer

 */

sound/pci/hda/hda_local.h

+1 −0
Original line number Diff line number Diff line
@@ -84,6 +84,7 @@ int snd_hda_codec_amp_read(struct hda_codec *codec, hda_nid_t nid, int ch, 
			   int direction, int index);

int snd_hda_codec_amp_update(struct hda_codec *codec, hda_nid_t nid, int ch,

			     int direction, int idx, int mask, int val);

void snd_hda_codec_resume_amp(struct hda_codec *codec);



/* mono switch binding multiple inputs */

#define HDA_BIND_MUTE_MONO(xname, nid, channel, indices, direction) \

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