Re: [alsa-devel] PROC_COEF/PROC_INDEX question

At Fri, 7 Aug 2009 17:38:59 +0800, Wu Fengguang wrote:

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?

AFAIK, depending on the mode, the index is incremented automatically.

Takashi