File 0053-topology-update-ABI-to-improve-support-for-different.patch of Package alsa

From 8c8372cc060ec16776db28f927c9402dcc09b001 Mon Sep 17 00:00:00 2001
From: Mengdong Lin <mengdong.lin@intel.com>
Date: Wed, 5 Aug 2015 14:41:50 +0100
Subject: [PATCH] topology: update ABI to improve support for different TLV
 object types.

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: Takashi Iwai <tiwai@suse.de>
---
 include/sound/asoc.h | 19 +++++++++++++------
 src/topology/ctl.c   | 20 ++++++++------------
 2 files changed, 21 insertions(+), 18 deletions(-)

diff --git a/include/sound/asoc.h b/include/sound/asoc.h
index bb6dcf3ff7b4..73eb80ef17cc 100644
--- a/include/sound/asoc.h
+++ b/include/sound/asoc.h
@@ -135,11 +135,19 @@ 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));
 
 /*
@@ -170,7 +178,7 @@ 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));
 
 /*
@@ -258,7 +266,6 @@ 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));
 
diff --git a/src/topology/ctl.c b/src/topology/ctl.c
index aa06ff64bc48..930b50897220 100644
--- a/src/topology/ctl.c
+++ b/src/topology/ctl.c
@@ -28,10 +28,7 @@ static int copy_tlv(struct tplg_elem *elem, struct tplg_elem *ref)
 	tplg_dbg("TLV '%s' used by '%s\n", ref->id, elem->id);
 
 	/* TLV has a fixed size */
-	mixer_ctrl->tlv = *tlv;
-
-	/* set size of TLV data */
-	mixer_ctrl->hdr.tlv_size = tlv->count * sizeof(uint32_t);
+	mixer_ctrl->hdr.tlv = *tlv;
 	return 0;
 }
 
@@ -209,20 +206,19 @@ static int tplg_parse_tlv_dbscale(snd_config_t *cfg, struct tplg_elem *elem)
 	snd_config_iterator_t i, next;
 	snd_config_t *n;
 	struct snd_soc_tplg_ctl_tlv *tplg_tlv;
+	struct snd_soc_tplg_tlv_dbscale *scale;
 	const char *id = NULL, *value = NULL;
-	int *data;
 
 	tplg_dbg(" scale: %s\n", elem->id);
 
 	tplg_tlv = calloc(1, sizeof(*tplg_tlv));
 	if (!tplg_tlv)
 		return -ENOMEM;
-	data = (int*)(tplg_tlv->data);
 
 	elem->tlv = tplg_tlv;
-	tplg_tlv->numid = SNDRV_CTL_TLVT_DB_SCALE;
-	tplg_tlv->count = 8;
-	tplg_tlv->size = sizeof(*tplg_tlv);
+	tplg_tlv->size = sizeof(struct snd_soc_tplg_ctl_tlv);
+	tplg_tlv->type = SNDRV_CTL_TLVT_DB_SCALE;
+	scale = &tplg_tlv->scale;
 
 	snd_config_for_each(i, next, cfg) {
 
@@ -242,11 +238,11 @@ static int tplg_parse_tlv_dbscale(snd_config_t *cfg, struct tplg_elem *elem)
 
 		/* get TLV data */
 		if (strcmp(id, "min") == 0)
-			data[0] = atoi(value);
+			scale->min = atoi(value);
 		else if (strcmp(id, "step") == 0)
-			data[1] = atoi(value);
+			scale->step = atoi(value);
 		else if (strcmp(id, "mute") == 0)
-			data[2] = atoi(value);
+			scale->mute = atoi(value);
 		else
 			SNDERR("error: unknown key %s\n", id);
 	}
-- 
2.5.3