[asterisk-bugs] [JIRA] (ASTERISK-22429) [patch] - chan_dahdi allows for updating both hw and sw gains, but dahdi show channel doesn't reflect changes

[Richard Mudgett (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-22429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Richard Mudgett reassigned ASTERISK-22429:
------------------------------------------

    Assignee: Richard Mudgett
    
> [patch] - chan_dahdi allows for updating both hw and sw gains, but dahdi show channel doesn't reflect changes
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: ASTERISK-22429
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-22429
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_dahdi
>    Affects Versions: 11.5.0
>            Reporter: Jaco Kroon
>            Assignee: Richard Mudgett
>            Severity: Minor
>         Attachments: asterisk-11.5.0-dahdi_gain_display.diff
>
>
> I think some output explains it best:
> # asterisk -Rx "dahdi show channel 3" | grep Gains
> Gains (RX/TX): 8.00/6.00
> # asterisk -rx "dahdi set swgain rx 3 4.0"
> software rx gain set to 4.0 on channel 3
> # asterisk -Rx "dahdi show channel 3" | grep Gains
> Gains (RX/TX): 8.00/6.00
> So in spite of the gain having being modified the change is not reflected.  There is also no indication whether the displayed gains is the hw or sw gains.
> I've written a small patch to rectify the situation and improve it somewhat:
> # asterisk -Rx "dahdi show channel 3" | grep Gains
> SW Gains (RX/TX): 8.00/6.00
> HW Gains (RX/TX): 0.00/0.00
> # asterisk -rx "dahdi set swgain rx 3 4.0"
> software rx gain set to 4.0 on channel 3
> # asterisk -Rx "dahdi show channel 3" | grep Gains
> SW Gains (RX/TX): 4.00/6.00
> HW Gains (RX/TX): 0.00/0.00
> There is a secondary (and actually more significant) problem here:
> The hw gains are not initialized during startup/reload at all (at least, not as far as I can tell).  And if they're already set during reload/restart the only way that I can see to get them back to some pre-configured value is to explicitly reset them using "dahdi set hwgain".  This patch assumes that they are zeroed during startup/reload (which can be false).

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