On 27 October 2016 at 17:35, Marcel Hasler <mahas...@gmail.com> wrote:
> Allow setting a custom record gain for the internal AC97 codec (if
> available). This can be
> a value between 0 and 15, 8 is the default and should be suitable for most
> users. The Windows
> driver also sets this to 8 without any possibility for changing it.
>
> Signed-off-by: Marcel Hasler <mahas...@gmail.com>
> ---
> drivers/media/usb/stk1160/stk1160-ac97.c | 11 ++++++++++-
> 1 file changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/usb/stk1160/stk1160-ac97.c
> b/drivers/media/usb/stk1160/stk1160-ac97.c
> index 6dbc39f..31bdd60d 100644
> --- a/drivers/media/usb/stk1160/stk1160-ac97.c
> +++ b/drivers/media/usb/stk1160/stk1160-ac97.c
> @@ -25,6 +25,11 @@
> #include "stk1160.h"
> #include "stk1160-reg.h"
>
> +static u8 gain = 8;
> +
> +module_param(gain, byte, 0444);
> +MODULE_PARM_DESC(gain, "Set capture gain level if AC97 codec is available
> (0-15, default: 8)");
> +
> static void stk1160_write_ac97(struct stk1160 *dev, u16 reg, u16 value)
> {
> /* Set codec register address */
> @@ -122,7 +127,11 @@ void stk1160_ac97_setup(struct stk1160 *dev)
> stk1160_write_ac97(dev, 0x16, 0x0808); /* Aux volume */
> stk1160_write_ac97(dev, 0x1a, 0x0404); /* Record select */
> stk1160_write_ac97(dev, 0x02, 0x0000); /* Master volume */
> - stk1160_write_ac97(dev, 0x1c, 0x0808); /* Record gain */
> +
> + /* Record gain */
> + gain = (gain > 15) ? 15 : gain;
> + stk1160_info("Setting capture gain to %d.", gain);
This message doesn't add anything useful, can we drop it?
> + stk1160_write_ac97(dev, 0x1c, (gain<<8) | gain);
>
> #ifdef DEBUG
> stk1160_ac97_dump_regs(dev);
> --
> 2.10.1
>
--
Ezequiel García, VanguardiaSur
www.vanguardiasur.com.ar
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