2016-11-20 18:36 GMT+01:00 Ezequiel Garcia <ezequ...@vanguardiasur.com.ar>:
> 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?
>
I think it would make sense to have some kind of feedback, at least
when the default value has been overridden. How about making this
conditional?
>> + 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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