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Message-ID:
<PAXPR04MB9448DECE01834E8DC9717E87F4402@PAXPR04MB9448.eurprd04.prod.outlook.com>
Date: Sun, 4 Feb 2024 14:29:01 +0000
From: Sandor Yu <sandor.yu@....com>
To: Alexander Stein <alexander.stein@...tq-group.com>,
"dmitry.baryshkov@...aro.org" <dmitry.baryshkov@...aro.org>,
"andrzej.hajda@...el.com" <andrzej.hajda@...el.com>,
"neil.armstrong@...aro.org" <neil.armstrong@...aro.org>, Laurent Pinchart
<laurent.pinchart@...asonboard.com>, "jonas@...boo.se" <jonas@...boo.se>,
"jernej.skrabec@...il.com" <jernej.skrabec@...il.com>, "airlied@...il.com"
<airlied@...il.com>, "daniel@...ll.ch" <daniel@...ll.ch>,
"robh+dt@...nel.org" <robh+dt@...nel.org>,
"krzysztof.kozlowski+dt@...aro.org" <krzysztof.kozlowski+dt@...aro.org>,
"shawnguo@...nel.org" <shawnguo@...nel.org>, "s.hauer@...gutronix.de"
<s.hauer@...gutronix.de>, "festevam@...il.com" <festevam@...il.com>,
"vkoul@...nel.org" <vkoul@...nel.org>, "dri-devel@...ts.freedesktop.org"
<dri-devel@...ts.freedesktop.org>, "devicetree@...r.kernel.org"
<devicetree@...r.kernel.org>, "linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>, "linux-kernel@...r.kernel.org"
<linux-kernel@...r.kernel.org>, "linux-phy@...ts.infradead.org"
<linux-phy@...ts.infradead.org>
CC: "kernel@...gutronix.de" <kernel@...gutronix.de>, dl-linux-imx
<linux-imx@....com>, Oliver Brown <oliver.brown@....com>, "sam@...nborg.org"
<sam@...nborg.org>
Subject: RE: [EXT] Re: [PATCH v12 7/7] phy: freescale: Add HDMI PHY driver for
i.MX8MQ
Hi Alexander,
Thanks your comments,
> -----Original Message-----
> From: Alexander Stein <alexander.stein@...tq-group.com>
> Sent: 2024年1月17日 17:47
> To: dmitry.baryshkov@...aro.org; andrzej.hajda@...el.com;
> neil.armstrong@...aro.org; Laurent Pinchart
> <laurent.pinchart@...asonboard.com>; jonas@...boo.se;
> jernej.skrabec@...il.com; airlied@...il.com; daniel@...ll.ch;
> robh+dt@...nel.org; krzysztof.kozlowski+dt@...aro.org;
> shawnguo@...nel.org; s.hauer@...gutronix.de; festevam@...il.com;
> vkoul@...nel.org; dri-devel@...ts.freedesktop.org;
> devicetree@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
> linux-kernel@...r.kernel.org; linux-phy@...ts.infradead.org; Sandor Yu
> <sandor.yu@....com>
> Cc: kernel@...gutronix.de; dl-linux-imx <linux-imx@....com>; Sandor Yu
> <sandor.yu@....com>; Oliver Brown <oliver.brown@....com>;
> sam@...nborg.org
> Subject: [EXT] Re: [PATCH v12 7/7] phy: freescale: Add HDMI PHY driver for
> i.MX8MQ
>
> Caution: This is an external email. Please take care when clicking links or
> opening attachments. When in doubt, report the message using the 'Report
> this email' button
>
>
> Hi Sandor,
>
> thanks for the update.
>
> Am Mittwoch, 10. Januar 2024, 02:08:48 CET schrieb Sandor Yu:
> > Add Cadence HDP-TX HDMI PHY driver for i.MX8MQ.
> >
> > Cadence HDP-TX PHY could be put in either DP mode or HDMI mode base
> on
> > the configuration chosen.
> > HDMI PHY mode is configurated in the driver.
> >
> > Signed-off-by: Sandor Yu <Sandor.yu@....com>
> > Tested-by: Alexander Stein <alexander.stein@...tq-group.com>
> > ---
> > v11->v12:
> > - Adjust clk disable order.
> > - Return error code to replace -1 for function wait_for_ack().
> > - Use bool for variable pclk_in.
> > - Add year 2024 to copyright.
> >
> > drivers/phy/freescale/Kconfig | 10 +
> > drivers/phy/freescale/Makefile | 1 +
> > drivers/phy/freescale/phy-fsl-imx8mq-hdmi.c | 959
> > ++++++++++++++++++++
> > 3 files changed, 970 insertions(+)
> > create mode 100644 drivers/phy/freescale/phy-fsl-imx8mq-hdmi.c
> >
> > diff --git a/drivers/phy/freescale/Kconfig
> > b/drivers/phy/freescale/Kconfig index c39709fd700ac..14f47b7cc77ab
> > 100644
> > --- a/drivers/phy/freescale/Kconfig
> > +++ b/drivers/phy/freescale/Kconfig
> > @@ -45,6 +45,16 @@ config PHY_FSL_IMX8MQ_DP
> > Enable this to support the Cadence HDPTX DP PHY driver
> > on i.MX8MQ SOC.
> >
> > +config PHY_FSL_IMX8MQ_HDMI
> > + tristate "Freescale i.MX8MQ HDMI PHY support"
> > + depends on OF && HAS_IOMEM
> > + depends on COMMON_CLK
> > + select GENERIC_PHY
> > + select CDNS_MHDP_HELPER
> > + help
> > + Enable this to support the Cadence HDPTX HDMI PHY driver
> > + on i.MX8MQ SOC.
> > +
> > endif
> >
> > config PHY_FSL_LYNX_28G
> > diff --git a/drivers/phy/freescale/Makefile
> > b/drivers/phy/freescale/Makefile index 47e5285209fa8..1380ac31c2ead
> > 100644
> > --- a/drivers/phy/freescale/Makefile
> > +++ b/drivers/phy/freescale/Makefile
> > @@ -1,5 +1,6 @@
> > # SPDX-License-Identifier: GPL-2.0-only
> > obj-$(CONFIG_PHY_FSL_IMX8MQ_DP) +=
> phy-fsl-imx8mq-dp.o
> > +obj-$(CONFIG_PHY_FSL_IMX8MQ_HDMI) += phy-fsl-imx8mq-hdmi.o
> > obj-$(CONFIG_PHY_FSL_IMX8MQ_USB) += phy-fsl-imx8mq-usb.o
> > obj-$(CONFIG_PHY_MIXEL_LVDS_PHY) += phy-fsl-imx8qm-lvds-phy.o
> > obj-$(CONFIG_PHY_MIXEL_MIPI_DPHY) += phy-fsl-imx8-mipi-dphy.o
> > diff --git a/drivers/phy/freescale/phy-fsl-imx8mq-hdmi.c
> > b/drivers/phy/freescale/phy-fsl-imx8mq-hdmi.c new file mode 100644
> > index 0000000000000..9e03c726f290c
> > --- /dev/null
> > +++ b/drivers/phy/freescale/phy-fsl-imx8mq-hdmi.c
> > @@ -0,0 +1,959 @@
> > [snip]
> > +int cdns_hdptx_hdmi_phy_valid(struct phy *phy, enum phy_mode mode,
> > +int
> > submode, + union phy_configure_opts
> *opts)
>
> This function can be made static.
>
OK, thanks!
B.R
Sandor
> Thanks and best regards,
> Alexander
>
> > +{
> > + u32 rate = opts->hdmi.pixel_clk_rate;
> > + int i;
> > +
> > + for (i = 0; i < ARRAY_SIZE(pixel_clk_output_ctrl_table); i++)
> > + if (rate ==
> pixel_clk_output_ctrl_table[i].pixel_clk_freq_min)
> > + return 0;
> > +
> > + return -EINVAL;
> > +}
> > +
> > +static int cdns_hdptx_hdmi_phy_init(struct phy *phy) {
> > + return 0;
> > +}
> > +
> > +static int cdns_hdptx_hdmi_configure(struct phy *phy,
> > + union phy_configure_opts *opts)
> {
> > + struct cdns_hdptx_hdmi_phy *cdns_phy = phy_get_drvdata(phy);
> > + int ret;
> > +
> > + cdns_phy->pixel_clk_rate = opts->hdmi.pixel_clk_rate;
> > + cdns_phy->color_space = opts->hdmi.color_space;
> > + cdns_phy->bpc = opts->hdmi.bpc;
> > +
> > + /* Check HDMI FW alive before HDMI PHY init */
> > + ret = hdptx_phy_check_alive(cdns_phy);
> > + if (!ret) {
> > + dev_err(cdns_phy->dev, "NO HDMI FW running\n");
> > + return -ENXIO;
> > + }
> > +
> > + /* Configure PHY */
> > + if (hdptx_hdmi_phy_cfg(cdns_phy, cdns_phy->pixel_clk_rate) < 0) {
> > + dev_err(cdns_phy->dev, "failed to set phy pclock\n");
> > + return -EINVAL;
> > + }
> > +
> > + ret = hdptx_hdmi_phy_power_up(cdns_phy);
> > + if (ret < 0)
> > + return ret;
> > +
> > + hdptx_hdmi_phy_set_vswing(cdns_phy);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct phy_ops cdns_hdptx_hdmi_phy_ops = {
> > + .init = cdns_hdptx_hdmi_phy_init,
> > + .configure = cdns_hdptx_hdmi_configure,
> > + .power_on = cdns_hdptx_hdmi_phy_on,
> > + .power_off = cdns_hdptx_hdmi_phy_off,
> > + .validate = cdns_hdptx_hdmi_phy_valid,
> > + .owner = THIS_MODULE,
> > +};
> > +
> > +static int cdns_hdptx_hdmi_phy_probe(struct platform_device *pdev) {
> > + struct cdns_hdptx_hdmi_phy *cdns_phy;
> > + struct device *dev = &pdev->dev;
> > + struct device_node *node = dev->of_node;
> > + struct phy_provider *phy_provider;
> > + struct resource *res;
> > + struct phy *phy;
> > + int ret;
> > +
> > + cdns_phy = devm_kzalloc(dev, sizeof(*cdns_phy), GFP_KERNEL);
> > + if (!cdns_phy)
> > + return -ENOMEM;
> > +
> > + dev_set_drvdata(dev, cdns_phy);
> > + cdns_phy->dev = dev;
> > + mutex_init(&cdns_phy->mbox_mutex);
> > +
> > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > + if (!res)
> > + return -ENODEV;
> > + cdns_phy->regs = devm_ioremap(dev, res->start, resource_size(res));
> > + if (IS_ERR(cdns_phy->regs))
> > + return PTR_ERR(cdns_phy->regs);
> > +
> > + phy = devm_phy_create(dev, node, &cdns_hdptx_hdmi_phy_ops);
> > + if (IS_ERR(phy))
> > + return PTR_ERR(phy);
> > +
> > + phy->attrs.mode = PHY_MODE_HDMI;
> > +
> > + cdns_phy->phy = phy;
> > + phy_set_drvdata(phy, cdns_phy);
> > +
> > + /* init base struct for access mhdp mailbox */
> > + cdns_phy->base.dev = cdns_phy->dev;
> > + cdns_phy->base.regs = cdns_phy->regs;
> > + cdns_phy->base.mbox_mutex = &cdns_phy->mbox_mutex;
> > +
> > + ret = hdptx_hdmi_clk_enable(cdns_phy);
> > + if (ret) {
> > + dev_err(dev, "Init clk fail\n");
> > + return -EINVAL;
> > + }
> > +
> > + phy_provider = devm_of_phy_provider_register(dev,
> of_phy_simple_xlate);
> > + if (IS_ERR(phy_provider)) {
> > + ret = PTR_ERR(phy_provider);
> > + goto clk_disable;
> > + }
> > +
> > + dev_dbg(dev, "probe success!\n");
> > +
> > + return 0;
> > +
> > +clk_disable:
> > + hdptx_hdmi_clk_disable(cdns_phy);
> > +
> > + return -EINVAL;
> > +}
> > +
> > +static int cdns_hdptx_hdmi_phy_remove(struct platform_device *pdev) {
> > + struct cdns_hdptx_hdmi_phy *cdns_phy =
> > +platform_get_drvdata(pdev);
> > +
> > + hdptx_hdmi_clk_disable(cdns_phy);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct of_device_id cdns_hdptx_hdmi_phy_of_match[] = {
> > + {.compatible = "fsl,imx8mq-hdmi-phy" },
> > + { /* sentinel */ }
> > +};
> > +MODULE_DEVICE_TABLE(of, cdns_hdptx_hdmi_phy_of_match);
> > +
> > +static struct platform_driver cdns_hdptx_hdmi_phy_driver = {
> > + .probe = cdns_hdptx_hdmi_phy_probe,
> > + .remove = cdns_hdptx_hdmi_phy_remove,
> > + .driver = {
> > + .name = "cdns-hdptx-hdmi-phy",
> > + .of_match_table = cdns_hdptx_hdmi_phy_of_match,
> > + }
> > +};
> > +module_platform_driver(cdns_hdptx_hdmi_phy_driver);
> > +
> > +MODULE_AUTHOR("Sandor Yu <sandor.yu@....com>");
> > +MODULE_DESCRIPTION("Cadence HDP-TX HDMI PHY driver");
> > +MODULE_LICENSE("GPL");
>
>
> --
> TQ-Systems GmbH | Mühlstraße 2, Gut Delling | 82229 Seefeld, Germany
> Amtsgericht München, HRB 105018
> Geschäftsführer: Detlef Schneider, Rüdiger Stahl, Stefan Schneider
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