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Commit 68026936 authored by Banajit Goswami's avatar Banajit Goswami Committed by Gerrit - the friendly Code Review server
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Asoc: Add audio backend to hwdep interface 



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: default avatarSubhash Chandra Bose Naripeddy <snariped@codeaurora.org>
Signed-off-by: default avatarKrishnankutty Kolathappilly <kkolat@codeaurora.org>
Signed-off-by: default avatarBanajit Goswami <bgoswami@codeaurora.org>
Signed-off-by: default avatarSudheer Papothi <spapothi@codeaurora.org>
Signed-off-by: default avatarMeng Wang <mwang@codeaurora.org>
parent b30fa891

include/uapi/sound/asound.h

+6 −1
Original line number Diff line number Diff line
@@ -110,11 +110,16 @@ enum { 
	SNDRV_HWDEP_IFACE_LINE6,	/* Line6 USB processors */

	SNDRV_HWDEP_IFACE_FW_MOTU,	/* MOTU FireWire series */

	SNDRV_HWDEP_IFACE_FW_FIREFACE,	/* RME Fireface series */

	SNDRV_HWDEP_IFACE_AUDIO_BE,	/* Backend Audio Control */

	SNDRV_HWDEP_IFACE_AUDIO_CODEC,  /* codec Audio Control */



	/* Don't forget to change the following: */

	SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_FW_FIREFACE

	SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_AUDIO_CODEC

};



#define SNDRV_HWDEP_IFACE_AUDIO_BE SNDRV_HWDEP_IFACE_AUDIO_BE

#define SNDRV_HWDEP_IFACE_AUDIO_CODEC SNDRV_HWDEP_IFACE_AUDIO_CODEC



struct snd_hwdep_info {

	unsigned int device;		/* WR: device number */

	int card;			/* R: card number */