lkml.org 
[lkml]   [2021]   [Mar]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v3 3/4] ALSA: hda/cirrus: Add jack detect interrupt support from CS42L42 companion codec.
From
Date
On 08/03/2021 3:35 pm, Pierre-Louis Bossart wrote:
>
>
>
>> @@ -38,6 +39,15 @@ struct cs_spec {
>>       /* for MBP SPDIF control */
>>       int (*spdif_sw_put)(struct snd_kcontrol *kcontrol,
>>                   struct snd_ctl_elem_value *ucontrol);
>> +
>> +    unsigned int cs42l42_hp_jack_in:1;
>> +    unsigned int cs42l42_mic_jack_in:1;
>> +
>> +    struct mutex cs8409_i2c_mux;
>
> what does this protect? there isn't any comment or explanations in the
> commit message.
>
>
we are protecting sequences of i2c transactions.

for example,  when we are writing sequence to activate jack detect, as a
result of interrupt via gpio4

unsolicited response can be called by framework at the same time. we
want to finish first sequence.

\
 
 \ /
  Last update: 2021-03-09 14:44    [W:3.209 / U:0.612 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site