[RESEND PATCH v7 1/1] firmware: mediatek: add adsp ipc protocol interface

[Greg Kroah-Hartman]

On Thu, May 05, 2022 at 01:30:48PM +0800, Tinghan Shen wrote:
> From: TingHan Shen <tinghan.shen at mediatek.com>
> 
> Some of mediatek processors contain
> the Tensilica HiFix DSP for audio processing.
> 
> The communication between Host CPU and DSP firmware is
> taking place using a shared memory area for message passing.
> 
> ADSP IPC protocol offers (send/recv) interfaces using
> mediatek-mailbox APIs.
> 
> We use two mbox channels to implement a request-reply protocol.
> 
> Signed-off-by: Allen-KH Cheng <allen-kh.cheng at mediatek.com>
> Signed-off-by: TingHan Shen <tinghan.shen at mediatek.com>
> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
> Reviewed-by: Curtis Malainey <cujomalainey at chromium.org>
> Reviewed-by: Tzung-Bi Shih <tzungbi at google.com>
> Reviewed-by: YC Hung <yc.hung at mediatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
> ---
>  drivers/firmware/Kconfig                      |   1 +
>  drivers/firmware/Makefile                     |   1 +
>  drivers/firmware/mediatek/Kconfig             |   9 +
>  drivers/firmware/mediatek/Makefile            |   2 +
>  drivers/firmware/mediatek/mtk-adsp-ipc.c      | 161 ++++++++++++++++++
>  .../linux/firmware/mediatek/mtk-adsp-ipc.h    |  65 +++++++
>  6 files changed, 239 insertions(+)
>  create mode 100644 drivers/firmware/mediatek/Kconfig
>  create mode 100644 drivers/firmware/mediatek/Makefile
>  create mode 100644 drivers/firmware/mediatek/mtk-adsp-ipc.c
>  create mode 100644 include/linux/firmware/mediatek/mtk-adsp-ipc.h

Why do you have a .h file, and export symbols in your .c file, yet you
have no user of these symbols or header file?

Without a user, we can not take this, sorry.

This should just be one single .c file.

Also, why a whole subdirectory for just one .c file?

thanks,

greg k-h