[bug report] ASoC: Intel: KMB: Enable TDM audio capture

[Pierre-Louis Bossart]

>>>>   506          switch (config->chan_nr) {
>>>>   507          case 8:
>>>>   508          case 4:
>>>>   509                  /*
>>>>   510                   * Platform is not capable of providing clocks for
>>>>   511                   * multi channel audio
>>>>   512                   */
>>>>   513                  if (kmb_i2s->master)
>>>>   514                          return -EINVAL;
>>>>   515
>>>>   516                  write_val = ((config->chan_nr / 2) << TDM_CHANNEL_CONFIG_BIT) |
>>>>   517                                  (config->data_width << DATA_WIDTH_CONFIG_BIT) |
>>>>   518                                  !MASTER_MODE | TDM_OPERATION;
>>>>                                        ^^^^^^^^^^^^
>>>> MASTER_MODE is BIT(13).  It's unclear what this is supposed to be.  My
>>>> best guess is that the ! should just be deleted.
>>>
>>> This ! is intentional because it is meant to be Slave mode. Would a better approach be to create another #define for slave mode?
>>
>> In my opinion, it's better to just leave it out.  ORing with zero causes
>> a different static checker warning on my unreleased checks...  Is it
>> 0 << 13?  I feel like ORing with zero just makes things more confusing.
>>
> It is 0<<13, in the event it was previously configured to Master I would need to unset the bit

You are assigning the result to write_val, so there's no memory of what 
was configured before?