From: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
To: alsa-devel@alsa-project.org
Cc: liam.r.girdwood@linux.intel.com
Subject: [PATCH v2] ALSA: core api: define offsets for TLV items
Date: Wed, 28 Mar 2018 10:09:04 -0700 [thread overview]
Message-ID: <20180328170904.19845-1-ranjani.sridharan@linux.intel.com> (raw)
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(+)
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
--
2.14.1
next reply other threads:[~2018-03-28 17:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-28 17:09 Ranjani Sridharan [this message]
2018-03-28 19:05 ` [PATCH v2] ALSA: core api: define offsets for TLV items Takashi Sakamoto
2018-03-28 19:30 ` Takashi Sakamoto
2018-03-29 4:07 ` Ranjani Sridharan
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