linux-kernel - Re: [PATCH v3 2/2] phy: starfive: Add mipi dphy tx support

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Date: Fri, 23 Feb 2024 17:42:22 +0530
From: Vinod Koul <vkoul@...nel.org>
To: Shengyang Chen <shengyang.chen@...rfivetech.com>
Cc: "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-phy@...ts.infradead.org" <linux-phy@...ts.infradead.org>,
	"kishon@...nel.org" <kishon@...nel.org>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"krzysztof.kozlowski+dt@...aro.org" <krzysztof.kozlowski+dt@...aro.org>,
	"conor+dt@...nel.org" <conor+dt@...nel.org>,
	"p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
	Minda Chen <minda.chen@...rfivetech.com>,
	Changhuang Liang <changhuang.liang@...rfivetech.com>,
	"rogerq@...nel.org" <rogerq@...nel.org>,
	"geert+renesas@...der.be" <geert+renesas@...der.be>,
	Keith Zhao <keith.zhao@...rfivetech.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 2/2] phy: starfive: Add mipi dphy tx support

On 22-02-24, 08:48, Shengyang Chen wrote:
> Hi, Vinod
> 
> Thanks for review and comment.
> 
> > -----Original Message-----
> > From: Vinod Koul <vkoul@...nel.org>
> > Sent: 2024年2月7日 18:36
> > To: Shengyang Chen <shengyang.chen@...rfivetech.com>
> > Cc: devicetree@...r.kernel.org; linux-phy@...ts.infradead.org;
> > kishon@...nel.org; robh+dt@...nel.org; krzysztof.kozlowski+dt@...aro.org;
> > conor+dt@...nel.org; p.zabel@...gutronix.de; Minda Chen
> > <minda.chen@...rfivetech.com>; Changhuang Liang
> > <changhuang.liang@...rfivetech.com>; rogerq@...nel.org;
> > geert+renesas@...der.be; Keith Zhao <keith.zhao@...rfivetech.com>;
> > linux-kernel@...r.kernel.org
> > Subject: Re: [PATCH v3 2/2] phy: starfive: Add mipi dphy tx support
> > 
> > On 06-02-24, 14:19, Shengyang Chen wrote:
> > > Add mipi dphy tx support for the StarFive JH7110 SoC.
> > > It is a module which is used to receive data from DSI driver and
> > > transfer data to DSI interface like mipi screen.
> > >
> > > Signed-off-by: Shengyang Chen <shengyang.chen@...rfivetech.com>
> > > ---
> > >  MAINTAINERS                               |   7 +
> > >  drivers/phy/starfive/Kconfig              |  10 +
> > >  drivers/phy/starfive/Makefile             |   1 +
> > >  drivers/phy/starfive/phy-jh7110-dphy-tx.c | 635
> > > ++++++++++++++++++++++
> > >  4 files changed, 653 insertions(+)
> > >  create mode 100644 drivers/phy/starfive/phy-jh7110-dphy-tx.c
> > >
> > > diff --git a/MAINTAINERS b/MAINTAINERS index
> > > 944b8ec33639..5e062b7393cb 100644
> > > --- a/MAINTAINERS
> > > +++ b/MAINTAINERS
> > > @@ -20864,6 +20864,13 @@ S:	Supported
> > >  F:	Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml
> > >  F:	drivers/phy/starfive/phy-jh7110-dphy-rx.c
> > >
> > > +STARFIVE JH7110 DPHY TX DRIVER
> > > +M:	Keith Zhao <keith.zhao@...rfivetech.com>
> > > +M:	Shengyang Chen <shengyang.chen@...rfivetech.com>
> > > +S:	Supported
> > > +F:	Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-tx.yaml
> > > +F:	drivers/phy/starfive/phy-jh7110-dphy-tx.c
> > > +
> > >  STARFIVE JH7110 MMC/SD/SDIO DRIVER
> > >  M:	William Qiu <william.qiu@...rfivetech.com>
> > >  S:	Supported
> > > diff --git a/drivers/phy/starfive/Kconfig
> > > b/drivers/phy/starfive/Kconfig index 9508e2143011..d0cdd7cb4a13 100644
> > > --- a/drivers/phy/starfive/Kconfig
> > > +++ b/drivers/phy/starfive/Kconfig
> > > @@ -15,6 +15,16 @@ config PHY_STARFIVE_JH7110_DPHY_RX
> > >  	  system. If M is selected, the module will be called
> > >  	  phy-jh7110-dphy-rx.ko.
> > >
> > > +config PHY_STARFIVE_JH7110_DPHY_TX
> > > +	tristate "StarFive JH7110 D-PHY TX Support"
> > > +	depends on HAS_IOMEM
> > > +	select GENERIC_PHY
> > > +	select GENERIC_PHY_MIPI_DPHY
> > > +	help
> > > +	  Choose this option if you have a StarFive D-PHY TX in your
> > > +	  system. If M is selected, the module will be called
> > > +	  phy-jh7110-dphy-tx.ko.
> > > +
> > >  config PHY_STARFIVE_JH7110_PCIE
> > >  	tristate "Starfive JH7110 PCIE 2.0/USB 3.0 PHY support"
> > >  	depends on HAS_IOMEM
> > > diff --git a/drivers/phy/starfive/Makefile
> > > b/drivers/phy/starfive/Makefile index b391018b7c47..eedc4a6fec15
> > > 100644
> > > --- a/drivers/phy/starfive/Makefile
> > > +++ b/drivers/phy/starfive/Makefile
> > > @@ -1,4 +1,5 @@
> > >  # SPDX-License-Identifier: GPL-2.0
> > >  obj-$(CONFIG_PHY_STARFIVE_JH7110_DPHY_RX)	+= phy-jh7110-dphy-rx.o
> > > +obj-$(CONFIG_PHY_STARFIVE_JH7110_DPHY_TX)	+= phy-jh7110-dphy-tx.o
> > >  obj-$(CONFIG_PHY_STARFIVE_JH7110_PCIE)		+= phy-jh7110-pcie.o
> > >  obj-$(CONFIG_PHY_STARFIVE_JH7110_USB)		+= phy-jh7110-usb.o
> > > diff --git a/drivers/phy/starfive/phy-jh7110-dphy-tx.c
> > > b/drivers/phy/starfive/phy-jh7110-dphy-tx.c
> > > new file mode 100644
> > > index 000000000000..00be118c9606
> > > --- /dev/null
> > > +++ b/drivers/phy/starfive/phy-jh7110-dphy-tx.c
> > > @@ -0,0 +1,635 @@
> > > +// SPDX-License-Identifier: GPL-2.0+
> > > +/*
> > > + * DPHY TX driver for the StarFive JH7110 SoC
> > > + *
> > > + * Copyright (C) 2023 StarFive Technology Co., Ltd.
> > > + * Author: Keith Zhao <keith.zhao@...rfivetech.com>
> > > + * Author: Shengyang Chen <shengyang.chen@...rfivetech.com>  */
> > > +
> > > +#include <linux/clk.h>
> > > +#include <linux/io.h>
> > > +#include <linux/mfd/syscon.h>
> > > +#include <linux/module.h>
> > > +#include <linux/of.h>
> > > +#include <linux/of_device.h>
> > > +#include <linux/phy/phy.h>
> > > +#include <linux/phy/phy-mipi-dphy.h>
> > > +#include <linux/platform_device.h>
> > > +#include <linux/pm_runtime.h>
> > > +#include <linux/reset.h>
> > > +
> > > +#define STF_DPHY_APBIFSAIF_SYSCFG(x)			(x)
> > > +
> > > +#define  STF_DPHY_AON_POWER_READY_N_SHIFT		0x0U
> > > +#define  STF_DPHY_AON_POWER_READY_N_MASK		BIT(0)
> > > +#define  STF_DPHY_CFG_L0_SWAP_SEL_SHIFT			0xCU
> > 
> > lower case please, here and everywhere
> 
> Sorry, I'm a little confused about this.
> Do you mean changing '0xCU' to '0xCu'?

Nope, it should be 0xcU, all the hex values should be in lower case

-- 
~Vinod