[alsa-devel] [PATCH] sound/usb: add dB range mapping for some devices.

[Takashi Iwai]

On Wed, 29 Jul 2015 09:13:54 +0200,
Yao-Wen Mao wrote:
> 
> Add the correct dB ranges of Bose Companion 5 and Drangonfly DAC 1.2.
> 
> Signed-off-by: Yao-Wen Mao <yaowen at google.com>
> ---
>  sound/usb/mixer_maps.c | 23 +++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
> 
> diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c
> index e5000da..f0c9e49 100644
> --- a/sound/usb/mixer_maps.c
> +++ b/sound/usb/mixer_maps.c
> @@ -339,6 +339,19 @@ static struct usbmix_name_map gamecom780_map[] = {
>  static const struct usbmix_name_map scms_usb3318_map[] = {
>  	{ 10, NULL },
>  	{ 0 }

You seem to have dropped some lines here.
At the next time, please at least do a build-test before submitting
the patch.

I applied it now with manual correction.  Thanks.


Takashi

> +
> +/* Bose companion 5, the dB conversion factor is 16 instead of 256 */
> +static struct usbmix_dB_map bose_companion5_dB = {-5006, -6};
> +static struct usbmix_name_map bose_companion5_map[] = {
> +	{ 3, NULL, .dB = &bose_companion5_dB },
> +	{ 0 }	/* terminator */
> +};
> +
> +/* Dragonfly DAC 1.2, the dB conversion factor is 1 instead of 256 */
> +static struct usbmix_dB_map dragonfly_1_2_dB = {0, 5000};
> +static struct usbmix_name_map dragonfly_1_2_map[] = {
> +	{ 7, NULL, .dB = &dragonfly_1_2_dB },
> +	{ 0 }	/* terminator */
>  };
>  
>  /*
> @@ -451,6 +464,16 @@ static struct usbmix_ctl_map usbmix_ctl_maps[] = {
>  		.id = USB_ID(0x25c4, 0x0003),
>  		.map = scms_usb3318_map,
>  	},
> +	{
> +		/* Bose Companion 5 */
> +		.id = USB_ID(0x05a7, 0x1020),
> +		.map = bose_companion5_map,
> +	},
> +	{
> +		/* Dragonfly DAC 1.2 */
> +		.id = USB_ID(0x21b4, 0x0081),
> +		.map = dragonfly_1_2_map,
> +	},
>  	{ 0 } /* terminator */
>  };
>  
> -- 
> 2.5.0.rc2.392.g76e840b
> 
>