From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wu Fengguang <fengguang.wu@intel.com>
Subject: PROC_COEF/PROC_INDEX question
Date: Fri, 7 Aug 2009 17:38:59 +0800
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Cc: Takashi Iwai <tiwai@suse.de>
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Hello,

I'm not sure of the usage for GET_PROC_COEF/GET_COEF_INDEX, and found
that their return value is unstable (changing all the time) for codec:

        Codec: Realtek ALC888
        Address: 2
        Function Id: 0x1
        Vendor Id: 0x10ec0888
        Subsystem Id: 0x80860023
        Revision Id: 0x100202

For example:

# hda-verb /dev/snd/hwC0D2 0x20 GET_PROC_COEF 0 
nid = 0x20, verb = 0xc00, param = 0x0
value = 0x80
# hda-verb /dev/snd/hwC0D2 0x20 GET_COEF_INDEX 0
nid = 0x20, verb = 0xd00, param = 0x0
value = 0xe
# hda-verb /dev/snd/hwC0D2 0x20 GET_PROC_COEF 0 
nid = 0x20, verb = 0xc00, param = 0x0
value = 0x9c00
# hda-verb /dev/snd/hwC0D2 0x20 GET_COEF_INDEX 0
nid = 0x20, verb = 0xd00, param = 0x0
value = 0xf

I wonder if this is the normal case?

Thanks,
Fengguang