[PATCH v7 2/3] firmware: mediatek: add adsp ipc protocol interface

[Tzung-Bi Shih]

On Mon, Nov 29, 2021 at 02:39:53PM +0800, allen-kh.cheng wrote:
> Reviewed-by: Tzung-Bi Shih <tzungbi at google.com>
> Reviewed-by: AngeloGioacchino Del Regno<angelogioacchino.delregno at collabora.com>
> Signed-off-by: Allen-KH Cheng <Allen-KH.Cheng at mediatek.com>

Please double check again if you use the R-b tags correctly.  I have provided my R-b tag before but have some more minor comments below.

With the minor comments:
Reviewed-by: Tzung-Bi Shih <tzungbi at google.com>

> diff --git a/drivers/firmware/mediatek/mtk-adsp-ipc.c b/drivers/firmware/mediatek/mtk-adsp-ipc.c
[...]
> +int adsp_ipc_send(struct mtk_adsp_ipc *ipc, unsigned int idx, uint32_t op)
> +{
> +     struct mtk_adsp_chan *dsp_chan;
> +     struct adsp_mbox_ch_info *ch_info;
> +     int ret;
> +
> +     if (idx >= MTK_ADSP_MBOX_NUM)
> +             return -EINVAL;
> +
> +     dsp_chan = &ipc->chans[idx];
> +     ch_info = dsp_chan->ch->con_priv;
> +     ch_info->ipc_op_val = op;
> +     ret = mbox_send_message(dsp_chan->ch, NULL);
> +     if (ret < 0)
> +             return ret;
> +
> +     return 0;
> +}
> +EXPORT_SYMBOL(adsp_ipc_send);

To be neat, I think use mtk_adsp for all names looks better.  I.e. s/adsp_ipc_send/mtk_adsp_ipc_send/.

> +static void adsp_ipc_recv(struct mbox_client *c, void *msg)
> +{

Ditto, mtk_adsp_ipc_recv looks better to me.

> diff --git a/include/linux/firmware/mediatek/mtk-adsp-ipc.h b/include/linux/firmware/mediatek/mtk-adsp-ipc.h
[...]
> +struct adsp_mbox_ch_info {
> +     u32 ipc_op_val;
> +     void __iomem *va_reg;
> +};

Ditto, mtk_adsp_mbox_ch_info.

> +static inline void adsp_ipc_set_data(struct mtk_adsp_ipc *ipc, void *data)
> +{

mtk_adsp_ipc_set_data, although there is no use case yet.

> +static inline void *adsp_ipc_get_data(struct mtk_adsp_ipc *ipc)
> +{

mtk_adsp_ipc_get_data, although there is no use case yet.