On Tue, 27 Mar 2018 20:39:45 +0200, Ranjani Sridharan wrote:
This patch adds macros for accessing 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
The subject is wrongly prefixed. This is ALSA core API stuff, not about ASoC.
And about the change...
--- a/include/sound/tlv.h +++ b/include/sound/tlv.h @@ -49,6 +49,11 @@
#define TLV_DB_GAIN_MUTE SNDRV_CTL_TLVD_DB_GAIN_MUTE
+#define TLV_ITEM_TYPE SNDRV_CTL_TLVD_ITEM_TYPE +#define TLV_ITEM_LEN SNDRV_CTL_TLVD_ITEM_LEN +#define TLV_DB_MIN SNDRV_CTL_TLVD_DB_SCALE_MIN +#define TLV_DB_MUTE_AND_STEP SNDRV_CTL_TLVD_DB_SCALE_MUTE_AND_STEP
What's the reason of these redundant redefinitions?
--- a/include/uapi/sound/tlv.h +++ b/include/uapi/sound/tlv.h @@ -60,6 +60,13 @@ unsigned int name[] = { \ SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \ } +/* Accessor macros for TLV type and len */ +#define SNDRV_CTL_TLVD_ITEM_TYPE 0 +#define SNDRV_CTL_TLVD_ITEM_LEN 1
+/* Accessor macros for min, mute and step values from dB scale type TLV */ +#define SNDRV_CTL_TLVD_DB_SCALE_MIN 2 +#define SNDRV_CTL_TLVD_DB_SCALE_MUTE_AND_STEP 3
These are no "macros" but constants. And, they use the same prefix SNDRV_CTL_TLVD_* as other existing macros. SNDTV_CTL_TLVD_*() is a macro to define/expand a TLV descriptor. It's not for defining the offset value as added in the patch.
That is, better to choose another unique prefix to distinguish the definitions clearly.
thanks,
Takashi