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Message-ID: <1609918232.23066.5.camel@mtksdaap41>
Date: Wed, 6 Jan 2021 15:30:32 +0800
From: Henry Chen <henryc.chen@...iatek.com>
To: Georgi Djakov <georgi.djakov@...aro.org>
CC: Rob Herring <robh+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Stephen Boyd <swboyd@...omium.org>,
Ryan Case <ryandcase@...omium.org>,
Mark Brown <broonie@...nel.org>,
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 V6 08/13] interconnect: mediatek: Add interconnect
provider driver
On Mon, 2021-01-04 at 20:36 +0200, Georgi Djakov wrote:
> On 12/24/20 08:08, 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 | 330 ++++++++++++++++++++++++++++++++
> > 5 files changed, 348 insertions(+)
> > create mode 100644 drivers/interconnect/mediatek/Kconfig
> > create mode 100644 drivers/interconnect/mediatek/Makefile
> > create mode 100644 drivers/interconnect/mediatek/mtk-emi.c
> >
> > diff --git a/drivers/interconnect/Kconfig b/drivers/interconnect/Kconfig
> > index 5b7204e..e939f5a 100644
> > --- a/drivers/interconnect/Kconfig
> > +++ b/drivers/interconnect/Kconfig
> > @@ -13,5 +13,6 @@ if INTERCONNECT
> >
> > source "drivers/interconnect/imx/Kconfig"
> > source "drivers/interconnect/qcom/Kconfig"
> > +source "drivers/interconnect/mediatek/Kconfig"
>
> Sort alphabetically please.
Ok
>
> >
> > endif
> > diff --git a/drivers/interconnect/Makefile b/drivers/interconnect/Makefile
> > index d203520..0643a24 100644
> > --- a/drivers/interconnect/Makefile
> > +++ b/drivers/interconnect/Makefile
> > @@ -6,3 +6,4 @@ icc-core-objs := core.o bulk.o
> > obj-$(CONFIG_INTERCONNECT) += icc-core.o
> > obj-$(CONFIG_INTERCONNECT_IMX) += imx/
> > obj-$(CONFIG_INTERCONNECT_QCOM) += qcom/
> > +obj-$(CONFIG_INTERCONNECT_MTK) += mediatek/
>
> Ditto.
Ok
>
> > diff --git a/drivers/interconnect/mediatek/Kconfig b/drivers/interconnect/mediatek/Kconfig
> > new file mode 100644
> > index 0000000..972d3bb
> > --- /dev/null
> > +++ b/drivers/interconnect/mediatek/Kconfig
> > @@ -0,0 +1,13 @@
> > +config INTERCONNECT_MTK
> > + bool "Mediatek Network-on-Chip interconnect drivers"
> > + depends on ARCH_MEDIATEK
> > + help
> > + Support for Mediatek's Network-on-Chip interconnect hardware.
> > +
> > +config INTERCONNECT_MTK_EMI
> > + tristate "Mediatek EMI interconnect driver"
> > + depends on INTERCONNECT_MTK
> > + depends on (MTK_DVFSRC && OF)
>
> Would it be possible to enable COMPILE_TEST?
Do you means change to "depends on (MTK_DVFSRC && OF) || COMPILE_TEST" ?
>
> > + help
> > + This is a driver for the Mediatek Network-on-Chip on DVFSRC-based
> > + platforms.
> > diff --git a/drivers/interconnect/mediatek/Makefile b/drivers/interconnect/mediatek/Makefile
> > new file mode 100644
> > index 0000000..353842b
> > --- /dev/null
> > +++ b/drivers/interconnect/mediatek/Makefile
> > @@ -0,0 +1,3 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +
> > +obj-$(CONFIG_INTERCONNECT_MTK_EMI) += mtk-emi.o
> > \ No newline at end of file
> > diff --git a/drivers/interconnect/mediatek/mtk-emi.c b/drivers/interconnect/mediatek/mtk-emi.c
> > new file mode 100644
> > index 0000000..9670077
> > --- /dev/null
> > +++ b/drivers/interconnect/mediatek/mtk-emi.c
> > @@ -0,0 +1,330 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (c) 2020, The Linux Foundation. All rights reserved.
>
> Just a reminder that the year should be updated when you re-submit.
OK, thanks for reminding me.
>
> > + *
> > + */
> > +
> > +#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>
> > +#include <dt-bindings/interconnect/mtk,mt8183-emi.h>
> > +#include <dt-bindings/interconnect/mtk,mt6873-emi.h>
>
> Nit: Alphanumeric order please.
OK.
>
> [..]
> > +static int emi_icc_remove(struct platform_device *pdev);
> > +static int emi_icc_probe(struct platform_device *pdev)
> > +{
> > + const struct of_device_id *match;
> > + const struct mtk_icc_desc *desc;
> > + struct device *dev = &pdev->dev;
> > + struct icc_node *node;
> > + struct icc_onecell_data *data;
> > + struct icc_provider *provider;
> > + struct mtk_icc_node **mnodes;
> > + size_t num_nodes, i, j;
> > + int ret;
> > +
> > + match = of_match_node(emi_icc_of_match, dev->parent->of_node);
> > +
> > + if (!match) {
> > + dev_err(dev, "invalid compatible string\n");
> > + return -ENODEV;
> > + }
> > +
> > + desc = match->data;
> > + mnodes = desc->nodes;
> > + num_nodes = desc->num_nodes;
> > +
> > + provider = devm_kzalloc(dev, sizeof(*provider), GFP_KERNEL);
> > + if (!provider)
> > + return -ENOMEM;
> > +
> > + data = devm_kzalloc(dev, struct_size(data, nodes, num_nodes),
> > + GFP_KERNEL);
> > + if (!data)
> > + return -ENOMEM;
> > +
> > + provider->dev = pdev->dev.parent;
> > + provider->set = emi_icc_set;
> > + provider->aggregate = emi_icc_aggregate;
> > + provider->xlate = of_icc_xlate_onecell;
> > + INIT_LIST_HEAD(&provider->nodes);
> > + provider->data = data;
> > +
> > + ret = icc_provider_add(provider);
> > + if (ret) {
> > + dev_err(&pdev->dev, "error adding interconnect provider\n");
> > + return ret;
> > + }
> > +
> > + for (i = 0; i < num_nodes; i++) {
> > + node = icc_node_create(mnodes[i]->id);
> > + if (IS_ERR(node)) {
> > + ret = PTR_ERR(node);
> > + goto err;
> > + }
> > +
> > + node->name = mnodes[i]->name;
> > + node->data = mnodes[i];
> > + icc_node_add(node, provider);
> > +
> > + for (j = 0; j < mnodes[i]->num_links; j++)
> > + icc_link_create(node, mnodes[i]->links[j]);
> > +
> > + data->nodes[i] = node;
> > + }
> > + data->num_nodes = num_nodes;
> > +
> > + platform_set_drvdata(pdev, provider);
> > +
> > + return 0;
> > +err:
> > + icc_nodes_remove(provider);
>
> Also call icc_provider_del() to restore the original state on error.
OK.
Thanks,
Henry
>
> Thanks,
> Georgi
>
> > + return ret;
> > +}
> > +
> > +static int emi_icc_remove(struct platform_device *pdev)
> > +{
> > + struct icc_provider *provider = platform_get_drvdata(pdev);
> > +
> > + icc_nodes_remove(provider);
> > + return icc_provider_del(provider);
> > +}
> > +
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