Sheetal 99eec7ce60 ASoC: tegra: Fix mbdrc driver issues ...

- MBDRC status register should be defined as volatile.

- MBDRC master volume control was not working for
  expected volume range. Updated the control so that it can
  work for -256dB to 255dB gain. Control can take values
  from 0 to 512 that is mapped to -256 to 256dB. The dB
  info is added as metadata of control.

  kcontrol defination will look like below:
    amixer -c 1 cget name='OPE1 mbdrc master volume'
    numid=1187,iface=MIXER,name='OPE1 mbdrc master volume'
    ; type=INTEGER,access=rw---R--,values=1,min=0,max=512,step=0
    : values=256
    | dBminmax-min=-256.00dB,max=255.00dB

Bug 200753407

Signed-off-by: Sheetal <sheetal@nvidia.com>
Change-Id: I707a89074342083b71f906f15ead243ee317a43b
Reviewed-on: https://git-master.nvidia.com/r/c/linux-5.10/+/2601115
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Sameer Pujar <spujar@nvidia.com>
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
Reviewed-by: Sharad Gupta <sharadg@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit

2022-09-29 15:50:28 +05:30

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