linux-kernel - Re: [PATCH V9 08/12] interconnect: mediatek: Add interconnect provider driver

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Date:   Thu, 18 Mar 2021 11:14:50 +0200
From:   Georgi Djakov <georgi.djakov@...aro.org>
To:     Henry Chen <henryc.chen@...iatek.com>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Stephen Boyd <swboyd@...omium.org>,
        Ryan Case <ryandcase@...omium.org>
Cc:     Mark Rutland <mark.rutland@....com>,
        Nicolas Boichat <drinkcat@...gle.com>,
        Fan Chen <fan.chen@...iatek.com>,
        James Liao <jamesjj.liao@...iatek.com>,
        Arvin Wang <arvin.wang@...iatek.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH V9 08/12] interconnect: mediatek: Add interconnect
 provider driver

On 3/2/21 05:47, Henry Chen wrote:
> Introduce Mediatek MT6873/MT8183/MT8192 specific provider driver
> using the interconnect framework.
> 
>              ICC provider         ICC Nodes
>                               ----          ----
>              ---------       |CPU |   |--- |VPU |
>     -----   |         |-----  ----    |     ----
>    |DRAM |--|DRAM     |       ----    |     ----
>    |     |--|scheduler|----- |GPU |   |--- |DISP|
>    |     |--|(EMI)    |       ----    |     ----
>    |     |--|         |       -----   |     ----
>     -----   |         |----- |MMSYS|--|--- |VDEC|
>              ---------        -----   |     ----
>                /|\                    |     ----
>                 |change DRAM freq     |--- |VENC|
>              ----------               |     ----
>             |  DVFSR   |              |
>             |          |              |     ----
>              ----------               |--- |IMG |
>                                       |     ----
>                                       |     ----
>                                       |--- |CAM |
>                                             ----
> Signed-off-by: Henry Chen <henryc.chen@...iatek.com>
> ---
>  drivers/interconnect/Kconfig            |   1 +
>  drivers/interconnect/Makefile           |   1 +
>  drivers/interconnect/mediatek/Kconfig   |  13 ++
>  drivers/interconnect/mediatek/Makefile  |   3 +
>  drivers/interconnect/mediatek/mtk-emi.c | 331 ++++++++++++++++++++++++++++++++
>  5 files changed, 349 insertions(+)
>  create mode 100644 drivers/interconnect/mediatek/Kconfig
>  create mode 100644 drivers/interconnect/mediatek/Makefile
>  create mode 100644 drivers/interconnect/mediatek/mtk-emi.c
[..]
> +++ b/drivers/interconnect/mediatek/mtk-emi.c
> @@ -0,0 +1,331 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2021, The Linux Foundation. All rights reserved.
> + *
> + */
> +
> +#include <linux/device.h>
> +#include <linux/interconnect-provider.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <linux/soc/mediatek/mtk_dvfsrc.h>

The patch looks good to me, but as there is a build dependency I'll wait
until the dvfsrc patches are reviewed/picked by Matthias.

Thanks,
Georgi