[alsa-devel] Still unhappy with removal of DXS controls

[Soeren D. Schulze]

On 06.07.2010 12:37, Clemens Ladisch wrote:
> Soeren D. Schulze wrote:
>> Please, even if the solution with the DXS controls in alsamixer didn't
>> comply with the ALSA policies, *it did work*!  The current one *does
>> not*.  Maybe make the maximum (or default?) DXS volume available as a
>> mixer control or as a module option or something -- whatever you
>> consider the best solution.
> 
> Please try this patch:
> 
> --- a/sound/pci/via82xx.c
> +++ b/sound/pci/via82xx.c
> @@ -85,6 +85,7 @@ static int joystick;
>  static int ac97_clock = 48000;
>  static char *ac97_quirk;
>  static int dxs_support;
> +static int dxs_init_volume = 31;
>  static int nodelay;
>  
>  module_param(index, int, 0444);
> @@ -103,6 +104,8 @@ module_param(ac97_quirk, charp, 0444);
>  MODULE_PARM_DESC(ac97_quirk, "AC'97 workaround for strange hardware.");
>  module_param(dxs_support, int, 0444);
>  MODULE_PARM_DESC(dxs_support, "Support for DXS channels (0 = auto, 1 = enable, 2 = disable, 3 = 48k only, 4 = no VRA, 5 = enable any sample rate)");
> +module_param(dxs_init_volume, int, 0644);
> +MODULE_PARM_DESC(dxs_init_volume, "initial DXS volume (0-31)");
>  module_param(nodelay, int, 0444);
>  MODULE_PARM_DESC(nodelay, "Disable 500ms init delay");
>  
> @@ -1245,8 +1248,10 @@ static int snd_via8233_playback_open(struct snd_pcm_substream *substream)
>  		return err;
>  	stream = viadev->reg_offset / 0x10;
>  	if (chip->dxs_controls[stream]) {
> -		chip->playback_volume[stream][0] = 0;
> +		chip->playback_volume[stream][0] =
> +				VIA_DXS_MAX_VOLUME - (dxs_init_volume & 31);
> -		chip->playback_volume[stream][1] = 0;
> +		chip->playback_volume[stream][1] =
> +				VIA_DXS_MAX_VOLUME - (dxs_init_volume & 31);
>  		chip->dxs_controls[stream]->vd[0].access &=
>  			~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
>  		snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE |

Thanks a lot, it works just fine.

A short test (using only the ears) shows that 24 might be a good value,
perhaps even a bit lower.

Is there a chance to get this upstream so I can update the wiki?


Sören