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[v2] ALSA: core api: define offsets for TLV items

Message ID 20180328170904.19845-1-ranjani.sridharan@linux.intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Ranjani Sridharan March 28, 2018, 5:09 p.m. UTC 
This patch defines accessor offsets for the type, length, min,
mute and step items in TLV data. These will be used by drivers to
extract the TLV data while loading topology.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
---
V2: removed redundant redefinitions and updated prefix
---
 include/uapi/sound/tlv.h | 8 ++++++++
 1 file changed, 8 insertions(+)
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Patch

diff --git a/include/uapi/sound/tlv.h b/include/uapi/sound/tlv.h
index be5371f09a62..1fd786a5e57b 100644
--- a/include/uapi/sound/tlv.h
+++ b/include/uapi/sound/tlv.h
@@ -98,4 +98,12 @@ 
 
 #define SNDRV_CTL_TLVD_DB_GAIN_MUTE	-9999999
 
+/* Accessor offsets for TLV data items */
+#define SNDRV_CTL_TLV_OFFSET_TYPE		0
+#define SNDRV_CTL_TLV_OFFSET_LEN		1
+
+/* Accessor offsets for min, mute and step items in dB scale type TLV */
+#define SNDRV_CTL_TLV_OFFSET_DB_MIN		2
+#define SNDRV_CTL_TLV_OFFSET_DB_MUTE_AND_STEP	3
+
 #endif