diff options
| -rw-r--r-- | sound/soc/soc-topology.c | 87 |
1 files changed, 79 insertions, 8 deletions
diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c index 6b05047a4134..c832b24b0cde 100644 --- a/sound/soc/soc-topology.c +++ b/sound/soc/soc-topology.c @@ -53,6 +53,23 @@ #define SOC_TPLG_PASS_START SOC_TPLG_PASS_MANIFEST #define SOC_TPLG_PASS_END SOC_TPLG_PASS_BE_DAI + +/* + * Old version of ABI structs, supported for backward compatibility. + */ + +/* Manifest v4 */ +struct snd_soc_tplg_manifest_v4 { + __le32 size; /* in bytes of this structure */ + __le32 control_elems; /* number of control elements */ + __le32 widget_elems; /* number of widget elements */ + __le32 graph_elems; /* number of graph elements */ + __le32 pcm_elems; /* number of PCM elements */ + __le32 dai_link_elems; /* number of DAI link elements */ + struct snd_soc_tplg_private priv; +} __packed; + +/* topology context */ struct soc_tplg { const struct firmware *fw; @@ -1798,27 +1815,81 @@ static int soc_tplg_be_dai_elems_load(struct soc_tplg *tplg, return 0; } +/** + * manifest_new_ver - Create a new version of manifest from the old version + * of source. + * @toplogy: topology context + * @src: old version of manifest as a source + * @manifest: latest version of manifest created from the source + * + * Support from vesion 4. Users need free the returned manifest manually. + */ +static int manifest_new_ver(struct soc_tplg *tplg, + struct snd_soc_tplg_manifest *src, + struct snd_soc_tplg_manifest **manifest) +{ + struct snd_soc_tplg_manifest *dest; + struct snd_soc_tplg_manifest_v4 *src_v4; + + *manifest = NULL; + + if (src->size != sizeof(*src_v4)) { + dev_err(tplg->dev, "ASoC: invalid manifest size\n"); + return -EINVAL; + } + + dev_warn(tplg->dev, "ASoC: old version of manifest\n"); + + src_v4 = (struct snd_soc_tplg_manifest_v4 *)src; + dest = kzalloc(sizeof(*dest) + src_v4->priv.size, GFP_KERNEL); + if (!dest) + return -ENOMEM; + + dest->size = sizeof(*dest); /* size of latest abi version */ + dest->control_elems = src_v4->control_elems; + dest->widget_elems = src_v4->widget_elems; + dest->graph_elems = src_v4->graph_elems; + dest->pcm_elems = src_v4->pcm_elems; + dest->dai_link_elems = src_v4->dai_link_elems; + dest->priv.size = src_v4->priv.size; + if (dest->priv.size) + memcpy(dest->priv.data, src_v4->priv.data, + src_v4->priv.size); + + *manifest = dest; + return 0; +} static int soc_tplg_manifest_load(struct soc_tplg *tplg, struct snd_soc_tplg_hdr *hdr) { - struct snd_soc_tplg_manifest *manifest; + struct snd_soc_tplg_manifest *manifest, *_manifest; + bool abi_match; + int err; if (tplg->pass != SOC_TPLG_PASS_MANIFEST) return 0; manifest = (struct snd_soc_tplg_manifest *)tplg->pos; - if (manifest->size != sizeof(*manifest)) { - dev_err(tplg->dev, "ASoC: invalid manifest size\n"); - return -EINVAL; - } - tplg->pos += sizeof(struct snd_soc_tplg_manifest); + /* check ABI version by size, create a new manifest if abi not match */ + if (manifest->size == sizeof(*manifest)) { + abi_match = true; + _manifest = manifest; + } else { + abi_match = false; + err = manifest_new_ver(tplg, manifest, &_manifest); + if (err < 0) + return err; + } + /* pass control to component driver for optional further init */ if (tplg->comp && tplg->ops && tplg->ops->manifest) - return tplg->ops->manifest(tplg->comp, manifest); + return tplg->ops->manifest(tplg->comp, _manifest); + + if (!abi_match) /* free the duplicated one */ + kfree(_manifest); - dev_err(tplg->dev, "ASoC: Firmware manifest not supported\n"); return 0; } |