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Asoc: Add audio backend to hwdep interface

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Add audio backend to hwdep interface. This is to provide
ioctl interface to communicate to routing driver.
Currently codec driver uses request_firmware to get calibration data
but as this firmware file is also written by userspace process after
bootup, it is not recommended to use request_firmware. ALSA core
provides mechanism to get hardware dependent data using hwdep nodes.
Codec will use aforementioned nodes to get calibration data from
userspace.
This commit adds hwdep interface for codec calibration.

Change-Id: I9abeb9cdf3ea58d9fac13eef5d849c8aadf1bfbf
Signed-off-by: Subhash Chandra Bose Naripeddy <snariped@codeaurora.org>
Signed-off-by: Krishnankutty Kolathappilly <kkolat@codeaurora.org>
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>
Signed-off-by: Meng Wang <mengw@codeaurora.org>
This commit is contained in:
Banajit Goswami 2016-11-21 17:54:51 -08:00 • committed by Gerrit - the friendly Code Review server
commit 4816300eff
1 changed files with 9 additions and 0 deletions
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9
include/uapi/sound/asound.h
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@ -111,11 +111,20 @@ enum {
SNDRV_HWDEP_IFACE_LINE6, /* Line6 USB processors */
SNDRV_HWDEP_IFACE_FW_MOTU, /* MOTU FireWire series */
SNDRV_HWDEP_IFACE_FW_FIREFACE, /* RME Fireface series */
#ifdef CONFIG_AUDIO_QGKI
SNDRV_HWDEP_IFACE_AUDIO_CODEC, /* codec Audio Control */
/* Don't forget to change the following: */
SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_AUDIO_CODEC
#else
SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_FW_FIREFACE
#endif
};
#ifdef CONFIG_AUDIO_QGKI
#define SNDRV_HWDEP_IFACE_AUDIO_CODEC SNDRV_HWDEP_IFACE_AUDIO_CODEC
#endif
struct snd_hwdep_info {
unsigned int device; /* WR: device number */
int card; /* R: card number */