[PATCH 3.4 103/107] ALSA: tlv: add DECLARE_TLV_DB_RANGE()

lizf
2016-03-16T08:13:33Z

From: Clemens Ladisch <clemens@ladisch.de>

3.4.111-rc1 review patch. If anyone has any objections, please let me know.

------------------

commit bf1d1c9b6179faa3bc32cee882462bc8eebde25d upstream.

Add a DECLARE_TLV_DB_RANGE() macro so that dB range information
can be specified without having to count the items manually for
TLV_DB_RANGE_HEAD().

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Zefan Li <lizefan@huawei.com>
---
include/sound/tlv.h | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/include/sound/tlv.h b/include/sound/tlv.h
index 137d165..49e7bd6 100644
--- a/include/sound/tlv.h
+++ b/include/sound/tlv.h
@@ -71,6 +71,10 @@

/* dB range container */
/* Each item is: <min> <max> <TLV> */
+#define TLV_DB_RANGE_ITEM(...) \
+ TLV_ITEM(SNDRV_CTL_TLVT_DB_RANGE, __VA_ARGS__)
+#define DECLARE_TLV_DB_RANGE(name, ...) \
+ unsigned int name[] = { TLV_DB_RANGE_ITEM(__VA_ARGS__) }
/* The below assumes that each item TLV is 4 words like DB_SCALE or LINEAR */
#define TLV_DB_RANGE_HEAD(num) \
SNDRV_CTL_TLVT_DB_RANGE, 6 * (num) * sizeof(unsigned int)
--
1.9.1