[alsa-devel] [PATCH 13/13] ASoC: topology: Able to create BE DAI links
mengdong.lin at linux.intel.com
mengdong.lin at linux.intel.com
Fri Aug 19 12:14:40 CEST 2016
From: Mengdong Lin <mengdong.lin at linux.intel.com>
Topology will check with ASoC if a BE (Backend) link already exists by
checking its ID. If the BE link doesn't exist, topology will create it
and the link_load ops and card's add_dai_link will be called for machine
specific init.
Signed-off-by: Mengdong Lin <mengdong.lin at linux.intel.com>
diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c
index 6a1a9c2..fd2c36b 100644
--- a/sound/soc/soc-topology.c
+++ b/sound/soc/soc-topology.c
@@ -49,9 +49,10 @@
#define SOC_TPLG_PASS_GRAPH 5
#define SOC_TPLG_PASS_PINS 6
#define SOC_TPLG_PASS_BE_DAI 7
+#define SOC_TPLG_PASS_LINK 8
#define SOC_TPLG_PASS_START SOC_TPLG_PASS_MANIFEST
-#define SOC_TPLG_PASS_END SOC_TPLG_PASS_BE_DAI
+#define SOC_TPLG_PASS_END SOC_TPLG_PASS_LINK
struct soc_tplg {
const struct firmware *fw;
@@ -493,6 +494,7 @@ static void remove_link(struct snd_soc_component *comp,
list_del(&dobj->list);
snd_soc_remove_dai_link(comp->card, link);
+ kfree(link->codecs);
kfree(link);
}
@@ -1631,6 +1633,29 @@ static void set_link_flags(struct snd_soc_dai_link *link,
if (flag_mask & SND_SOC_TPLG_LNK_FLGBIT_IGNORE_POWERDOWN_TIME)
link->ignore_pmdown_time =
flags & SND_SOC_TPLG_LNK_FLGBIT_IGNORE_POWERDOWN_TIME ? 1 : 0;
+
+ if (flag_mask & SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_RATES)
+ link->symmetric_rates =
+ flags & SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_RATES ? 1 : 0;
+
+ if (flag_mask & SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_CHANNELS)
+ link->symmetric_channels =
+ flags & SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_CHANNELS ?
+ 1 : 0;
+
+ if (flag_mask & SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_SAMPLEBITS)
+ link->symmetric_samplebits =
+ flags & SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_SAMPLEBITS ?
+ 1 : 0;
+
+ if (flag_mask & SND_SOC_TPLG_LNK_FLGBIT_DPCM_PLAYBACK)
+ link->dpcm_playback =
+ flags & SND_SOC_TPLG_LNK_FLGBIT_DPCM_PLAYBACK ? 1 : 0;
+
+ if (flag_mask & SND_SOC_TPLG_LNK_FLGBIT_DPCM_CAPTURE)
+ link->dpcm_capture =
+ flags & SND_SOC_TPLG_LNK_FLGBIT_DPCM_CAPTURE ? 1 : 0;
+
}
/* create the FE DAI link */
@@ -1865,6 +1890,189 @@ static int soc_tplg_be_dai_elems_load(struct soc_tplg *tplg,
return 0;
}
+/* *
+ * set_be_link_hw_format - Set the HW audio format of the BE DAI link.
+ * @tplg: topology context
+ * @cfg: topology BE DAI link configs.
+ *
+ * Topology context contains a list of supported HW formats (configs) and
+ * a default format ID for the BE link. This function will use this default ID
+ * to choose the HW format to set the link's DAI format for init.
+ */
+static void set_be_link_hw_format(struct snd_soc_dai_link *link,
+ struct snd_soc_tplg_link_config *cfg)
+{
+ struct snd_soc_tplg_hw_config *hw_config;
+ unsigned char bclk_master, fsync_master;
+ unsigned char invert_bclk, invert_fsync;
+ int i;
+
+ for (i = 0; i < cfg->num_hw_configs; i++) {
+ hw_config = &cfg->hw_config[i];
+ if (hw_config->id != cfg->default_hw_config_id)
+ continue;
+
+ link->dai_fmt = hw_config->fmt & SND_SOC_DAIFMT_FORMAT_MASK;
+
+ /* clock signal polarity */
+ invert_bclk = hw_config->invert_bclk;
+ invert_fsync = hw_config->invert_fsync;
+ if (!invert_bclk && !invert_fsync)
+ link->dai_fmt |= SND_SOC_DAIFMT_NB_NF;
+ else if (!invert_bclk && invert_fsync)
+ link->dai_fmt |= SND_SOC_DAIFMT_NB_IF;
+ else if (invert_bclk && !invert_fsync)
+ link->dai_fmt |= SND_SOC_DAIFMT_IB_NF;
+ else
+ link->dai_fmt |= SND_SOC_DAIFMT_IB_IF;
+
+ /* clock masters */
+ bclk_master = hw_config->bclk_master;
+ fsync_master = hw_config->fsync_master;
+ if (!bclk_master && !fsync_master)
+ link->dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
+ else if (bclk_master && !fsync_master)
+ link->dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
+ else if (!bclk_master && fsync_master)
+ link->dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
+ else
+ link->dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
+
+ return;
+ }
+}
+
+/* create a BE DAI link */
+static int soc_tplg_be_link_create(struct soc_tplg *tplg,
+ struct snd_soc_tplg_link_config *cfg)
+{
+ struct snd_soc_dai_link *link;
+ int i, ret = 0;
+
+ dev_dbg(tplg->dev,
+ "Adding BE link %s, stream name %s\n",
+ cfg->name, cfg->stream_name);
+
+ link = kzalloc(sizeof(struct snd_soc_dai_link), GFP_KERNEL);
+ if (link == NULL)
+ return -ENOMEM;
+
+ /* id and names */
+ if (strlen(cfg->name))
+ link->name = cfg->name;
+ if (strlen(cfg->stream_name))
+ link->stream_name = cfg->stream_name;
+ link->id = cfg->id;
+
+ /* components */
+ if (strlen(cfg->cpu.name))
+ link->cpu_name = cfg->cpu.name;
+ link->cpu_dai_name = cfg->cpu.dai_name;
+
+ if (!cfg->num_codecs || !cfg->codecs) {
+ ret = -EINVAL;
+ goto err;
+ }
+
+ link->num_codecs = cfg->num_codecs;
+ link->codecs = kcalloc(link->num_codecs,
+ sizeof(struct snd_soc_dai_link_component),
+ GFP_KERNEL);
+ if (!link->codecs) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ for (i = 0; i < link->num_codecs ; i++) {
+ if (strlen(cfg->codecs[i].name))
+ link->codecs[i].name = cfg->codecs[i].name;
+ link->codecs[i].dai_name = cfg->codecs[i].dai_name;
+ }
+
+ /* hw format */
+ if (cfg->num_hw_configs)
+ set_be_link_hw_format(link, cfg);
+
+ /* flags */
+ link->no_pcm = 1;
+ if (cfg->flag_mask)
+ set_link_flags(link, cfg->flag_mask, cfg->flags);
+
+ /* pass control to component driver for optional further init */
+ ret = soc_tplg_dai_link_load(tplg, link);
+ if (ret < 0) {
+ dev_err(tplg->dev, "ASoC: BE link loading failed\n");
+ goto err;
+ }
+
+ link->dobj.index = tplg->index;
+ link->dobj.ops = tplg->ops;
+ link->dobj.type = SND_SOC_DOBJ_DAI_LINK;
+ list_add(&link->dobj.list, &tplg->comp->dobj_list);
+
+ snd_soc_add_dai_link(tplg->comp->card, link);
+ return 0;
+
+err:
+ if (link) {
+ kfree(link->codecs);
+ kfree(link->params);
+ kfree(link);
+ }
+
+ return ret;
+}
+
+/* Config an existing or create a new BE DAI link */
+static int soc_tplg_be_link_config(struct soc_tplg *tplg,
+ struct snd_soc_tplg_link_config *cfg)
+{
+ struct snd_soc_dai_link *link;
+
+ link = snd_soc_find_dai_link(tplg->comp->card, cfg->id);
+ if (!link)
+ return soc_tplg_be_link_create(tplg, cfg);
+
+ /* TODO: configure existing BE links. No user request atm. */
+ return 0;
+}
+
+
+/* Load BE link elements from the topology context */
+static int soc_tplg_be_link_elems_load(struct soc_tplg *tplg,
+ struct snd_soc_tplg_hdr *hdr)
+{
+ struct snd_soc_tplg_link_config *link;
+ int count = hdr->count;
+ int i;
+
+ if (tplg->pass != SOC_TPLG_PASS_LINK) {
+ tplg->pos += hdr->size + hdr->payload_size;
+ return 0;
+ };
+
+ if (soc_tplg_check_elem_count(tplg,
+ sizeof(struct snd_soc_tplg_link_config), count,
+ hdr->payload_size, "BE DAI link")) {
+ dev_err(tplg->dev, "ASoC: invalid count %d for BE DAI link elems\n",
+ count);
+ return -EINVAL;
+ }
+
+ /* config or create the BE DAI links */
+ for (i = 0; i < count; i++) {
+ link = (struct snd_soc_tplg_link_config *)tplg->pos;
+ if (link->size != sizeof(*link)) {
+ dev_err(tplg->dev, "ASoC: invalid link config size\n");
+ return -EINVAL;
+ }
+
+ soc_tplg_be_link_config(tplg, link);
+ tplg->pos += (sizeof(*link) + link->priv.size);
+ }
+
+ return 0;
+}
static int soc_tplg_manifest_load(struct soc_tplg *tplg,
struct snd_soc_tplg_hdr *hdr)
@@ -1971,6 +2179,8 @@ static int soc_tplg_load_header(struct soc_tplg *tplg,
return soc_tplg_pcm_elems_load(tplg, hdr);
case SND_SOC_TPLG_TYPE_BE_DAI:
return soc_tplg_be_dai_elems_load(tplg, hdr);
+ case SND_SOC_TPLG_TYPE_BACKEND_LINK:
+ return soc_tplg_be_link_elems_load(tplg, hdr);
case SND_SOC_TPLG_TYPE_MANIFEST:
return soc_tplg_manifest_load(tplg, hdr);
default:
--
2.5.0
More information about the Alsa-devel
mailing list