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ASoC: topology: Update TLV support so we can support more TLV types

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Currently the TLV topology structure is targeted at only supporting the
DB scale data. This patch extends support for the other TLV types so they
can be easily added at a later stage.

TLV structure is moved to common topology control header since it's a
common field for controls and can be processed in a general way.

Users must set a proper access flag for a control since it's used to
decide if the TLV field is valid and if a TLV callback is needed.

Removed the following fields from topology TLV struct:
- size/count: type can decide the size.
- numid: not needed to initialize TLV for kcontrol.
- data: replaced by the type specific struct.

Added TLV structure to generic control header and removed TLV structure
from mixer control.

Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Mengdong Lin 2015-08-05 14:41:13 +01:00 committed by Mark Brown
parent 113adf21cf
commit 28a87eebca
2 changed files with 55 additions and 24 deletions
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19
include/uapi/sound/asoc.h
View File

@ -137,11 +137,19 @@ struct snd_soc_tplg_private {
/*
* Kcontrol TLV data.
*/
struct snd_soc_tplg_tlv_dbscale {
__le32 min;
__le32 step;
__le32 mute;
} __attribute__((packed));
struct snd_soc_tplg_ctl_tlv {
__le32 size; /* in bytes aligned to 4 */
__le32 numid; /* control element numeric identification */
__le32 count; /* number of elem in data array */
__le32 data[SND_SOC_TPLG_TLV_SIZE];
__le32 size; /* in bytes of this structure */
__le32 type; /* SNDRV_CTL_TLVT_*, type of TLV */
union {
__le32 data[SND_SOC_TPLG_TLV_SIZE];
struct snd_soc_tplg_tlv_dbscale scale;
};
} __attribute__((packed));
/*
@ -172,7 +180,7 @@ struct snd_soc_tplg_ctl_hdr {
char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
__le32 access;
struct snd_soc_tplg_kcontrol_ops_id ops;
__le32 tlv_size; /* non zero means control has TLV data */
struct snd_soc_tplg_ctl_tlv tlv;
} __attribute__((packed));
/*
@ -260,7 +268,6 @@ struct snd_soc_tplg_mixer_control {
__le32 invert;
__le32 num_channels;
struct snd_soc_tplg_channel channel[SND_SOC_TPLG_MAX_CHAN];
struct snd_soc_tplg_ctl_tlv tlv;
struct snd_soc_tplg_private priv;
} __attribute__((packed));

60
sound/soc/soc-topology.c
View File

@ -33,6 +33,7 @@
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/soc-topology.h>
#include <sound/tlv.h>
/*
* We make several passes over the data (since it wont necessarily be ordered)
@ -579,28 +580,51 @@ static int soc_tplg_init_kcontrol(struct soc_tplg *tplg,
return 0;
}
static int soc_tplg_create_tlv(struct soc_tplg *tplg,
struct snd_kcontrol_new *kc, struct snd_soc_tplg_ctl_tlv *tplg_tlv)
static int soc_tplg_create_tlv_db_scale(struct soc_tplg *tplg,
struct snd_kcontrol_new *kc, struct snd_soc_tplg_tlv_dbscale *scale)
{
struct snd_ctl_tlv *tlv;
int size;
unsigned int item_len = 2 * sizeof(unsigned int);
unsigned int *p;
if (tplg_tlv->count == 0)
return 0;
size = ((tplg_tlv->count + (sizeof(unsigned int) - 1)) &
~(sizeof(unsigned int) - 1));
tlv = kzalloc(sizeof(*tlv) + size, GFP_KERNEL);
if (tlv == NULL)
p = kzalloc(item_len + 2 * sizeof(unsigned int), GFP_KERNEL);
if (!p)
return -ENOMEM;
dev_dbg(tplg->dev, " created TLV type %d size %d bytes\n",
tplg_tlv->numid, size);
p[0] = SNDRV_CTL_TLVT_DB_SCALE;
p[1] = item_len;
p[2] = scale->min;
p[3] = (scale->step & TLV_DB_SCALE_MASK)
| (scale->mute ? TLV_DB_SCALE_MUTE : 0);
tlv->numid = tplg_tlv->numid;
tlv->length = size;
memcpy(&tlv->tlv[0], tplg_tlv->data, size);
kc->tlv.p = (void *)tlv;
kc->tlv.p = (void *)p;
return 0;
}
static int soc_tplg_create_tlv(struct soc_tplg *tplg,
struct snd_kcontrol_new *kc, struct snd_soc_tplg_ctl_hdr *tc)
{
struct snd_soc_tplg_ctl_tlv *tplg_tlv;
if (!(tc->access & SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE))
return 0;
if (tc->access & SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK) {
kc->tlv.c = snd_soc_bytes_tlv_callback;
} else {
tplg_tlv = &tc->tlv;
switch (tplg_tlv->type) {
case SNDRV_CTL_TLVT_DB_SCALE:
return soc_tplg_create_tlv_db_scale(tplg, kc,
&tplg_tlv->scale);
/* TODO: add support for other TLV types */
default:
dev_dbg(tplg->dev, "Unsupported TLV type %d\n",
tplg_tlv->type);
return -EINVAL;
}
}
return 0;
}
@ -772,7 +796,7 @@ static int soc_tplg_dmixer_create(struct soc_tplg *tplg, unsigned int count,
}
/* create any TLV data */
soc_tplg_create_tlv(tplg, &kc, &mc->tlv);
soc_tplg_create_tlv(tplg, &kc, &mc->hdr);
/* register control here */
err = soc_tplg_add_kcontrol(tplg, &kc,