[v7,03/11] ASoC: topology: Support topology file of ABI v4
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Message ID e9345194b93962f11616f7ca2170b9f674e7c223.1478071138.git.mengdong.lin@linux.intel.com
State New
Headers show

Commit Message

mengdong.lin@linux.intel.com Nov. 2, 2016, 5:03 p.m. UTC
From: Mengdong Lin <mengdong.lin@linux.intel.com>

Users start to use topology ABI from v4. ABI v5 updated existing manifest
and PCM elements. Two previous patches can support these ABI updates in a
backward compatible way. So if the topology file from user space is
generated by ABI v4, kernel will no longer quit but continue parsing.

Signed-off-by: Mengdong Lin <mengdong.lin@linux.intel.com>

Patch
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diff --git a/include/uapi/sound/asoc.h b/include/uapi/sound/asoc.h
index 8d9814b..69cae71 100644
--- a/include/uapi/sound/asoc.h
+++ b/include/uapi/sound/asoc.h
@@ -83,7 +83,8 @@ 
 #define SND_SOC_TPLG_NUM_TEXTS		16
 
 /* ABI version */
-#define SND_SOC_TPLG_ABI_VERSION	0x5
+#define SND_SOC_TPLG_ABI_VERSION	0x5	/* current version */
+#define SND_SOC_TPLG_ABI_VERSION_MIN	0x4	/* oldest version supported */
 
 /* Max size of TLV data */
 #define SND_SOC_TPLG_TLV_SIZE		32
diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c
index 0f1c8eb..2f9b64e 100644
--- a/sound/soc/soc-topology.c
+++ b/sound/soc/soc-topology.c
@@ -2056,7 +2056,9 @@  static int soc_valid_header(struct soc_tplg *tplg,
 		return -EINVAL;
 	}
 
-	if (hdr->abi != SND_SOC_TPLG_ABI_VERSION) {
+	/* Support ABI from version 4 */
+	if (hdr->abi > SND_SOC_TPLG_ABI_VERSION
+		|| hdr->abi < SND_SOC_TPLG_ABI_VERSION_MIN) {
 		dev_err(tplg->dev,
 			"ASoC: pass %d invalid ABI version got 0x%x need 0x%x at offset 0x%lx size 0x%zx.\n",
 			tplg->pass, hdr->abi,