[PATCH] ASoC: max98357a: set channels_max to 4

[Cheng-yi Chiang]

Hi Tzung-Bi,

On a platform, the four max98357a amps will be controlled by only one
codec device, as GPIO for SD_MODE is shared by all amps and is the
only thing to be controlled.
In this sense, I think we can treat max98357a DAI as if it supports
four channels.
I understand that this solution is not scalable, because one can
control as many amps as they want.
Theoretically, the number of supported channels by this codec device
is unlimited.
I found that rt1015.c has similar usage.
Do you have a better suggestion to support this kind of use case ?
Thanks!




On Tue, Jun 1, 2021 at 2:20 PM Tzung-Bi Shih <tzungbi at google.com> wrote:
>
> On Wed, May 26, 2021 at 11:47 PM Judy Hsiao <judyhsiao at chromium.org> wrote:
> > Sets channels_max to 4 to support QUAD channel.
>
> Could you point out probably the up-to-date MAX98357A datasheet for
> 4-channel support?
>
> On a related note, from the public datasheet I could find[1], "Table
> 5" only shows 2 channel's configuration.
>
> [1]: https://pdf1.alldatasheet.com/datasheet-pdf/view/623796/MAXIM/MAX98357A.html