RE: [EXT] Re: [PATCH v16 4/8] drm: bridge: Cadence: Add MHDP8501 DP/HDMI driver

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> 
> Le 02/07/2024 à 14:22, Sandor Yu a écrit :
> > Add a new DRM DisplayPort and HDMI bridge driver for Candence
> MHDP8501
> > used in i.MX8MQ SOC. MHDP8501 could support HDMI or DisplayPort
> > standards according embedded Firmware running in the uCPU.
> >
> > For iMX8MQ SOC, the DisplayPort/HDMI FW was loaded and activated by
> > SOC's ROM code. Bootload binary included respective specific firmware
> > is required.
> >
> > Driver will check display connector type and
> > then load the corresponding driver.
> >
> > Signed-off-by: Sandor Yu <Sandor.yu@xxxxxxx>
> > Tested-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
> > ---
> > v15->v16:
> > - rebase the patchset sits on top Dmitry's
> >     'make use of the HDMI connector infrastructure' patchset ([2]).
> > - Add DRM_BRIDGE_OP_HDMI flags for HDMI driver,
> > - Introduce the hdmi info frame helper functions, added
> hdmi_clear_infoframe(),
> >    hdmi_write_infoframe() and hdmi_tmds_char_rate_valid().
> > - mode_fixup() was replaced by atomic_check().
> > - Fix video mode 4Kp30 did not work on some displays that support
> >    LTE_340Mcsc_scramble.
> > - updated for tmds_char_rate added in patch #2.
> >
> > v13->v14:
> > - Rebase to next-20240219, replace get_edid function by edid_read
> >    function.
> >
> > v12->v13:
> > - Explicitly include linux/platform_device.h for cdns-mhdp8501-core.c
> > - Fix build warning
> > - Order bit bpc and color_space in descending shit.
> >
> > v11->v12:
> > - Replace DRM_INFO with dev_info or dev_warn.
> > - Replace DRM_ERROR with dev_err.
> > - Return ret when cdns_mhdp_dpcd_read failed in function
> cdns_dp_aux_transferi().
> > - Remove unused parmeter in function cdns_dp_get_msa_misc
> >    and use two separate variables for color space and bpc.
> > - Add year 2024 to copyright.
> >
> >   drivers/gpu/drm/bridge/cadence/Kconfig        |  16 +
> >   drivers/gpu/drm/bridge/cadence/Makefile       |   2 +
> >   .../drm/bridge/cadence/cdns-mhdp8501-core.c   | 330 +++++++++
> >   .../drm/bridge/cadence/cdns-mhdp8501-core.h   | 367 +++++++++
> >   .../gpu/drm/bridge/cadence/cdns-mhdp8501-dp.c | 700
> ++++++++++++++++++
> >   .../drm/bridge/cadence/cdns-mhdp8501-hdmi.c   | 595
> +++++++++++++++
> >   6 files changed, 2010 insertions(+)
> >   create mode 100644
> drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-core.c
> >   create mode 100644
> drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-core.h
> >   create mode 100644
> drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-dp.c
> >   create mode 100644
> drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-hdmi.c
> >
> > diff --git a/drivers/gpu/drm/bridge/cadence/Kconfig
> b/drivers/gpu/drm/bridge/cadence/Kconfig
> > index e0973339e9e3..45848e741f5f 100644
> > --- a/drivers/gpu/drm/bridge/cadence/Kconfig
> > +++ b/drivers/gpu/drm/bridge/cadence/Kconfig
> > @@ -51,3 +51,19 @@ config DRM_CDNS_MHDP8546_J721E
> >         initializes the J721E Display Port and sets up the
> >         clock and data muxes.
> >   endif
> > +
> > +config DRM_CDNS_MHDP8501
> > +     tristate "Cadence MHDP8501 DP/HDMI bridge"
> > +     select DRM_KMS_HELPER
> > +     select DRM_PANEL_BRIDGE
> > +     select DRM_DISPLAY_DP_HELPER
> > +     select DRM_DISPLAY_HELPER
> > +     select CDNS_MHDP_HELPER
> > +     select DRM_CDNS_AUDIO
> > +     depends on OF
> > +     help
> > +       Support Cadence MHDP8501 DisplayPort/HDMI bridge.
> > +       Cadence MHDP8501 support one or more protocols,
> > +       including DisplayPort and HDMI.
> > +       To use the DP and HDMI drivers, their respective
> > +       specific firmware is required.
> > diff --git a/drivers/gpu/drm/bridge/cadence/Makefile
> b/drivers/gpu/drm/bridge/cadence/Makefile
> > index 087dc074820d..02c1a9f3cf6f 100644
> > --- a/drivers/gpu/drm/bridge/cadence/Makefile
> > +++ b/drivers/gpu/drm/bridge/cadence/Makefile
> > @@ -6,3 +6,5 @@ obj-$(CONFIG_CDNS_MHDP_HELPER) +=
> cdns-mhdp-helper.o
> >   obj-$(CONFIG_DRM_CDNS_MHDP8546) += cdns-mhdp8546.o
> >   cdns-mhdp8546-y := cdns-mhdp8546-core.o cdns-mhdp8546-hdcp.o
> >   cdns-mhdp8546-$(CONFIG_DRM_CDNS_MHDP8546_J721E) +=
> cdns-mhdp8546-j721e.o
> > +obj-$(CONFIG_DRM_CDNS_MHDP8501) += cdns-mhdp8501.o
> > +cdns-mhdp8501-y := cdns-mhdp8501-core.o cdns-mhdp8501-dp.o
> cdns-mhdp8501-hdmi.o
> > diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-core.c
> b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-core.c
> > new file mode 100644
> > index 000000000000..c306db982b76
> > --- /dev/null
> > +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-core.c
> > @@ -0,0 +1,330 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> > +/*
> > + * Cadence Display Port Interface (DP) driver
> > + *
> > + * Copyright (C) 2023, 2024 NXP Semiconductor, Inc.
> > + *
> > + */
> > +#include <drm/drm_of.h>
> > +#include <drm/drm_print.h>
> > +#include <linux/clk.h>
> > +#include <linux/irq.h>
> > +#include <linux/mutex.h>
> > +#include <linux/of_device.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/phy/phy.h>
> > +
> > +#include "cdns-mhdp8501-core.h"
> > +
> > +static int cdns_mhdp8501_read_hpd(struct cdns_mhdp8501_device
> *mhdp)
> > +{
> > +     u8 status;
> > +     int ret;
> > +
> > +     mutex_lock(&mhdp->mbox_mutex);
> > +
> > +     ret = cdns_mhdp_mailbox_send(&mhdp->base,
> MB_MODULE_ID_GENERAL,
> > +                                  GENERAL_GET_HPD_STATE, 0,
> NULL);
> > +     if (ret)
> > +             goto err_get_hpd;
> > +
> > +     ret = cdns_mhdp_mailbox_recv_header(&mhdp->base,
> MB_MODULE_ID_GENERAL,
> > +
> GENERAL_GET_HPD_STATE,
> > +                                         sizeof(status));
> > +     if (ret)
> > +             goto err_get_hpd;
> > +
> > +     ret = cdns_mhdp_mailbox_recv_data(&mhdp->base, &status,
> sizeof(status));
> > +     if (ret)
> > +             goto err_get_hpd;
> > +
> > +     mutex_unlock(&mhdp->mbox_mutex);
> > +
> > +     return status;
> > +
> > +err_get_hpd:
> > +     dev_err(mhdp->dev, "read hpd  failed: %d\n", ret);
> > +     mutex_unlock(&mhdp->mbox_mutex);
> > +
> > +     return ret;
> > +}
> > +
> > +enum drm_connector_status cdns_mhdp8501_detect(struct
> cdns_mhdp8501_device *mhdp)
> > +{
> > +     u8 hpd = 0xf;
> > +
> > +     hpd = cdns_mhdp8501_read_hpd(mhdp);
> > +     if (hpd == 1)
> > +             return connector_status_connected;
> > +     else if (hpd == 0)
> > +             return connector_status_disconnected;
> > +
> > +     dev_warn(mhdp->dev, "Unknown cable status, hdp=%u\n", hpd);
> > +     return connector_status_unknown;
> > +}
> > +
> > +static void hotplug_work_func(struct work_struct *work)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp = container_of(work,
> > +                                                  struct
> cdns_mhdp8501_device,
> > +
> hotplug_work.work);
> > +     enum drm_connector_status status =
> cdns_mhdp8501_detect(mhdp);
> > +
> > +     drm_bridge_hpd_notify(&mhdp->bridge, status);
> > +
> > +     if (status == connector_status_connected) {
> > +             /* Cable connected  */
> > +             DRM_INFO("HDMI/DP Cable Plug In\n");
> > +             enable_irq(mhdp->irq[IRQ_OUT]);
> > +     } else if (status == connector_status_disconnected) {
> > +             /* Cable Disconnected  */
> > +             DRM_INFO("HDMI/DP Cable Plug Out\n");
> > +             enable_irq(mhdp->irq[IRQ_IN]);
> > +     }
> > +}
> > +
> > +static irqreturn_t cdns_mhdp8501_irq_thread(int irq, void *data)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp = data;
> > +
> > +     disable_irq_nosync(irq);
> > +
> > +     mod_delayed_work(system_wq, &mhdp->hotplug_work,
> > +                      msecs_to_jiffies(HOTPLUG_DEBOUNCE_MS));
> > +
> > +     return IRQ_HANDLED;
> > +}
> > +
> > +static int cdns_mhdp8501_dt_parse(struct cdns_mhdp8501_device *mhdp,
> > +                               struct platform_device *pdev)
> > +{
> > +     struct device *dev = &pdev->dev;
> > +     struct device_node *np = dev->of_node;
> > +     struct device_node *remote;
> > +
> > +     remote = of_graph_get_remote_node(np, 1, 0);
> > +     if (!remote) {
> > +             dev_err(dev, "fail to get remote node\n");
> > +             of_node_put(remote);
> > +             return -EINVAL;
> > +     }
> > +
> > +     /* get connector type */
> > +     if (of_device_is_compatible(remote, "hdmi-connector")) {
> > +             mhdp->connector_type =
> DRM_MODE_CONNECTOR_HDMIA;
> > +
> > +     } else if (of_device_is_compatible(remote, "dp-connector")) {
> > +             mhdp->connector_type =
> DRM_MODE_CONNECTOR_DisplayPort;
> > +
> > +     } else {
> > +             dev_err(dev, "Unknown connector type\n");
> > +             of_node_put(remote);
> > +             return -EINVAL;
> > +     }
> > +
> > +     of_node_put(remote);
> > +     return true;
> > +}
> > +
> > +static void cdns_mhdp8501_add_bridge(struct cdns_mhdp8501_device
> *mhdp)
> > +{
> > +     mhdp->bridge.type = mhdp->connector_type;
> > +     mhdp->bridge.driver_private = mhdp;
> > +     mhdp->bridge.of_node = mhdp->dev->of_node;
> > +     mhdp->bridge.vendor = "NXP";
> > +     mhdp->bridge.product = "i.MX8";
> > +     mhdp->bridge.ops = DRM_BRIDGE_OP_DETECT |
> DRM_BRIDGE_OP_EDID |
> > +                        DRM_BRIDGE_OP_HPD;
> > +
> > +     if (mhdp->connector_type == DRM_MODE_CONNECTOR_HDMIA) {
> > +             mhdp->bridge.funcs = &cdns_hdmi_bridge_funcs;
> > +             mhdp->bridge.ops |= DRM_BRIDGE_OP_HDMI;
> > +     } else if (mhdp->connector_type ==
> DRM_MODE_CONNECTOR_DisplayPort) {
> > +             mhdp->bridge.funcs = &cdns_dp_bridge_funcs;
> > +     } else {
> > +             dev_err(mhdp->dev, "Unsupported connector type!\n");
> > +             return;
> > +     }
> > +
> > +     drm_bridge_add(&mhdp->bridge);
> > +}
> > +
> > +static int cdns_mhdp8501_probe(struct platform_device *pdev)
> > +{
> > +     struct device *dev = &pdev->dev;
> > +     struct cdns_mhdp8501_device *mhdp;
> > +     struct resource *res;
> > +     enum phy_mode phy_mode;
> > +     u32 reg;
> > +     int ret;
> > +
> > +     mhdp = devm_kzalloc(dev, sizeof(*mhdp), GFP_KERNEL);
> > +     if (!mhdp)
> > +             return -ENOMEM;
> > +
> > +     mutex_init(&mhdp->mbox_mutex);
> > +     mhdp->dev = dev;
> > +
> > +     INIT_DELAYED_WORK(&mhdp->hotplug_work, hotplug_work_func);
> > +
> > +     res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > +     if (!res)
> > +             return -ENODEV;
> > +
> > +     mhdp->regs = devm_ioremap(dev, res->start, resource_size(res));
> > +     if (IS_ERR(mhdp->regs))
> > +             return PTR_ERR(mhdp->regs);
> > +
> > +     ret = cdns_mhdp8501_dt_parse(mhdp, pdev);
> > +     if (ret < 0)
> > +             return -EINVAL;
> > +
> > +     mhdp->phy = devm_of_phy_get_by_index(dev, pdev->dev.of_node,
> 0);
> > +     if (IS_ERR(mhdp->phy))
> > +             return dev_err_probe(dev, PTR_ERR(mhdp->phy), "no PHY
> configured\n");
> > +
> > +     mhdp->irq[IRQ_IN] = platform_get_irq_byname(pdev, "plug_in");
> > +     if (mhdp->irq[IRQ_IN] < 0)
> > +             return dev_err_probe(dev, mhdp->irq[IRQ_IN], "No
> plug_in irq number\n");
> > +
> > +     mhdp->irq[IRQ_OUT] = platform_get_irq_byname(pdev, "plug_out");
> > +     if (mhdp->irq[IRQ_OUT] < 0)
> > +             return dev_err_probe(dev, mhdp->irq[IRQ_OUT], "No
> plug_out irq number\n");
> > +
> > +     irq_set_status_flags(mhdp->irq[IRQ_IN], IRQ_NOAUTOEN);
> > +     ret = devm_request_threaded_irq(dev, mhdp->irq[IRQ_IN],
> > +                                     NULL,
> cdns_mhdp8501_irq_thread,
> > +                                     IRQF_ONESHOT,
> dev_name(dev), mhdp);
> > +     if (ret < 0) {
> > +             dev_err(dev, "can't claim irq %d\n", mhdp->irq[IRQ_IN]);
> > +             return -EINVAL;
> > +     }
> > +
> > +     irq_set_status_flags(mhdp->irq[IRQ_OUT], IRQ_NOAUTOEN);
> > +     ret = devm_request_threaded_irq(dev, mhdp->irq[IRQ_OUT],
> > +                                     NULL,
> cdns_mhdp8501_irq_thread,
> > +                                     IRQF_ONESHOT,
> dev_name(dev), mhdp);
> > +     if (ret < 0) {
> > +             dev_err(dev, "can't claim irq %d\n",
> mhdp->irq[IRQ_OUT]);
> > +             return -EINVAL;
> > +     }
> > +
> > +     /* set default lane mapping */
> > +     mhdp->lane_mapping = LANE_MAPPING_NORMAL;
> > +
> > +     /* cdns_mhdp8501_dt_parse() ensures connector_type is valid */
> > +     mhdp->plat_data = of_device_get_match_data(dev);
> > +     if (mhdp->connector_type ==
> DRM_MODE_CONNECTOR_DisplayPort) {
> > +             mhdp->lane_mapping =
> mhdp->plat_data->dp_lane_mapping;
> > +             phy_mode = PHY_MODE_DP;
> > +     } else if (mhdp->connector_type ==
> DRM_MODE_CONNECTOR_HDMIA) {
> > +             mhdp->lane_mapping =
> mhdp->plat_data->hdmi_lane_mapping;
> > +             phy_mode = PHY_MODE_HDMI;
> > +     }
> 
> On imx8mq-zii-ultra board lane mapping doesn't follow your default setting.
> Please add a "lane-mapping" property in the DT to allow to customized this
> setting for each board.
> You can make it optional and keep the default value when the property is
> missing on the DT node.
> 

OK, "lane-mapping" property will be added in the next version.

Sandor

> Regards,
> Benjamin
> 
> > +
> > +     dev_set_drvdata(dev, mhdp);
> > +
> > +     /* init base struct for access mhdp mailbox */
> > +     mhdp->base.dev = mhdp->dev;
> > +     mhdp->base.regs = mhdp->regs;
> > +     mhdp->base.mbox_mutex = &mhdp->mbox_mutex;
> > +
> > +     if (mhdp->connector_type ==
> DRM_MODE_CONNECTOR_DisplayPort) {
> > +             drm_dp_aux_init(&mhdp->dp.aux);
> > +             mhdp->dp.aux.name = "mhdp8501_dp_aux";
> > +             mhdp->dp.aux.dev = dev;
> > +             mhdp->dp.aux.transfer = cdns_dp_aux_transfer;
> > +     }
> > +
> > +     /* Enable APB clock */
> > +     mhdp->apb_clk = devm_clk_get(dev, NULL);
> > +     if (IS_ERR(mhdp->apb_clk))
> > +             return dev_err_probe(dev, PTR_ERR(mhdp->apb_clk),
> > +                                  "couldn't get apb clk\n");
> > +
> > +     clk_prepare_enable(mhdp->apb_clk);
> > +
> > +     /*
> > +      * Wait for the KEEP_ALIVE "message" on the first 8 bits.
> > +      * Updated each sched "tick" (~2ms)
> > +      */
> > +     ret = readl_poll_timeout(mhdp->regs + KEEP_ALIVE, reg,
> > +                              reg & CDNS_KEEP_ALIVE_MASK, 500,
> > +                              CDNS_KEEP_ALIVE_TIMEOUT);
> > +     if (ret) {
> > +             dev_err(dev, "device didn't give any life sign: reg %d\n",
> reg);
> > +             goto clk_disable;
> > +     }
> > +
> > +     /* Mailbox protect for HDMI PHY access */
> > +     mutex_lock(&mhdp->mbox_mutex);
> > +     ret = phy_init(mhdp->phy);
> > +     mutex_unlock(&mhdp->mbox_mutex);
> > +     if (ret) {
> > +             dev_err(dev, "Failed to initialize PHY: %d\n", ret);
> > +             goto clk_disable;
> > +     }
> > +
> > +     /* Mailbox protect for HDMI PHY access */
> > +     mutex_lock(&mhdp->mbox_mutex);
> > +     ret = phy_set_mode(mhdp->phy, phy_mode);
> > +     mutex_unlock(&mhdp->mbox_mutex);
> > +     if (ret) {
> > +             dev_err(dev, "Failed to configure PHY: %d\n", ret);
> > +             goto clk_disable;
> > +     }
> > +
> > +     /* Enable cable hotplug detect */
> > +     if (cdns_mhdp8501_read_hpd(mhdp))
> > +             enable_irq(mhdp->irq[IRQ_OUT]);
> > +     else
> > +             enable_irq(mhdp->irq[IRQ_IN]);
> > +
> > +     cdns_mhdp8501_add_bridge(mhdp);
> > +
> > +     return 0;
> > +
> > +clk_disable:
> > +     clk_disable_unprepare(mhdp->apb_clk);
> > +
> > +     return -EINVAL;
> > +}
> > +
> > +static void cdns_mhdp8501_remove(struct platform_device *pdev)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp =
> platform_get_drvdata(pdev);
> > +
> > +     if (mhdp->connector_type ==
> DRM_MODE_CONNECTOR_DisplayPort)
> > +             cdns_dp_aux_destroy(mhdp);
> > +
> > +     drm_bridge_remove(&mhdp->bridge);
> > +     clk_disable_unprepare(mhdp->apb_clk);
> > +}
> > +
> > +static struct mhdp8501_plat_data imx8mq_mhdp_drv_data = {
> > +     .hdmi_lane_mapping = LANE_MAPPING_FLIPPED,
> > +     .dp_lane_mapping = LANE_MAPPING_IMX8MQ_DP,
> > +};
> > +
> > +static const struct of_device_id cdns_mhdp8501_dt_ids[] = {
> > +     { .compatible = "fsl,imx8mq-mhdp8501",
> > +       .data = &imx8mq_mhdp_drv_data
> > +     },
> > +     { },
> > +};
> > +MODULE_DEVICE_TABLE(of, cdns_mhdp8501_dt_ids);
> > +
> > +static struct platform_driver cdns_mhdp8501_driver = {
> > +     .probe = cdns_mhdp8501_probe,
> > +     .remove = cdns_mhdp8501_remove,
> > +     .driver = {
> > +             .name = "cdns-mhdp8501",
> > +             .of_match_table = cdns_mhdp8501_dt_ids,
> > +     },
> > +};
> > +
> > +module_platform_driver(cdns_mhdp8501_driver);
> > +
> > +MODULE_AUTHOR("Sandor Yu <sandor.yu@xxxxxxx>");
> > +MODULE_DESCRIPTION("Cadence MHDP8501 bridge driver");
> > +MODULE_LICENSE("GPL");
> > diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-core.h
> b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-core.h
> > new file mode 100644
> > index 000000000000..593071f36995
> > --- /dev/null
> > +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-core.h
> > @@ -0,0 +1,367 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * Cadence MHDP 8501 Common head file
> > + *
> > + * Copyright (C) 2019-2024 NXP Semiconductor, Inc.
> > + *
> > + */
> > +
> > +#ifndef _CDNS_MHDP8501_CORE_H_
> > +#define _CDNS_MHDP8501_CORE_H_
> > +
> > +#include <drm/bridge/cdns-mhdp-helper.h>
> > +#include <drm/drm_bridge.h>
> > +#include <drm/drm_connector.h>
> > +#include <drm/display/drm_dp_helper.h>
> > +#include <linux/bitops.h>
> > +
> > +#define ADDR_IMEM                    0x10000
> > +#define ADDR_DMEM                    0x20000
> > +
> > +/* APB CFG addr */
> > +#define APB_CTRL                     0
> > +#define XT_INT_CTRL                  0x04
> > +#define MAILBOX_FULL_ADDR            0x08
> > +#define MAILBOX_EMPTY_ADDR           0x0c
> > +#define MAILBOX0_WR_DATA             0x10
> > +#define MAILBOX0_RD_DATA             0x14
> > +#define KEEP_ALIVE                   0x18
> > +#define VER_L                                0x1c
> > +#define VER_H                                0x20
> > +#define VER_LIB_L_ADDR                       0x24
> > +#define VER_LIB_H_ADDR                       0x28
> > +#define SW_DEBUG_L                   0x2c
> > +#define SW_DEBUG_H                   0x30
> > +#define MAILBOX_INT_MASK             0x34
> > +#define MAILBOX_INT_STATUS           0x38
> > +#define SW_CLK_L                     0x3c
> > +#define SW_CLK_H                     0x40
> > +#define SW_EVENTS0                   0x44
> > +#define SW_EVENTS1                   0x48
> > +#define SW_EVENTS2                   0x4c
> > +#define SW_EVENTS3                   0x50
> > +#define XT_OCD_CTRL                  0x60
> > +#define APB_INT_MASK                 0x6c
> > +#define APB_STATUS_MASK                      0x70
> > +
> > +/* Source phy comp */
> > +#define PHY_DATA_SEL                 0x0818
> > +#define LANES_CONFIG                 0x0814
> > +
> > +/* Source CAR Addr */
> > +#define SOURCE_HDTX_CAR                      0x0900
> > +#define SOURCE_DPTX_CAR                      0x0904
> > +#define SOURCE_PHY_CAR                       0x0908
> > +#define SOURCE_CEC_CAR                       0x090c
> > +#define SOURCE_CBUS_CAR                      0x0910
> > +#define SOURCE_PKT_CAR                       0x0918
> > +#define SOURCE_AIF_CAR                       0x091c
> > +#define SOURCE_CIPHER_CAR            0x0920
> > +#define SOURCE_CRYPTO_CAR            0x0924
> > +
> > +/* clock meters addr */
> > +#define CM_CTRL                              0x0a00
> > +#define CM_I2S_CTRL                  0x0a04
> > +#define CM_SPDIF_CTRL                        0x0a08
> > +#define CM_VID_CTRL                  0x0a0c
> > +#define CM_LANE_CTRL                 0x0a10
> > +#define I2S_NM_STABLE                        0x0a14
> > +#define I2S_NCTS_STABLE                      0x0a18
> > +#define SPDIF_NM_STABLE                      0x0a1c
> > +#define SPDIF_NCTS_STABLE            0x0a20
> > +#define NMVID_MEAS_STABLE            0x0a24
> > +#define I2S_MEAS                     0x0a40
> > +#define SPDIF_MEAS                   0x0a80
> > +#define NMVID_MEAS                   0x0ac0
> > +
> > +/* source vif addr */
> > +#define BND_HSYNC2VSYNC                      0x0b00
> > +#define HSYNC2VSYNC_F1_L1            0x0b04
> > +#define HSYNC2VSYNC_STATUS           0x0b0c
> > +#define HSYNC2VSYNC_POL_CTRL         0x0b10
> > +
> > +/* MHDP TX_top_comp */
> > +#define SCHEDULER_H_SIZE             0x1000
> > +#define SCHEDULER_V_SIZE             0x1004
> > +#define HDTX_SIGNAL_FRONT_WIDTH              0x100c
> > +#define HDTX_SIGNAL_SYNC_WIDTH               0x1010
> > +#define HDTX_SIGNAL_BACK_WIDTH               0x1014
> > +#define HDTX_CONTROLLER                      0x1018
> > +#define HDTX_HPD                     0x1020
> > +#define HDTX_CLOCK_REG_0             0x1024
> > +#define HDTX_CLOCK_REG_1             0x1028
> > +
> > +/* DPTX hpd addr */
> > +#define HPD_IRQ_DET_MIN_TIMER                0x2100
> > +#define HPD_IRQ_DET_MAX_TIMER                0x2104
> > +#define HPD_UNPLGED_DET_MIN_TIMER    0x2108
> > +#define HPD_STABLE_TIMER             0x210c
> > +#define HPD_FILTER_TIMER             0x2110
> > +#define HPD_EVENT_MASK                       0x211c
> > +#define HPD_EVENT_DET                        0x2120
> > +
> > +/* DPTX framer addr */
> > +#define DP_FRAMER_GLOBAL_CONFIG              0x2200
> > +#define DP_SW_RESET                  0x2204
> > +#define DP_FRAMER_TU                 0x2208
> > +#define DP_FRAMER_PXL_REPR           0x220c
> > +#define DP_FRAMER_SP                 0x2210
> > +#define AUDIO_PACK_CONTROL           0x2214
> > +#define DP_VC_TABLE(x)                       (0x2218 + ((x) << 2))
> > +#define DP_VB_ID                     0x2258
> > +#define DP_MTPH_LVP_CONTROL          0x225c
> > +#define DP_MTPH_SYMBOL_VALUES                0x2260
> > +#define DP_MTPH_ECF_CONTROL          0x2264
> > +#define DP_MTPH_ACT_CONTROL          0x2268
> > +#define DP_MTPH_STATUS                       0x226c
> > +#define DP_INTERRUPT_SOURCE          0x2270
> > +#define DP_INTERRUPT_MASK            0x2274
> > +#define DP_FRONT_BACK_PORCH          0x2278
> > +#define DP_BYTE_COUNT                        0x227c
> > +
> > +/* DPTX stream addr */
> > +#define MSA_HORIZONTAL_0             0x2280
> > +#define MSA_HORIZONTAL_1             0x2284
> > +#define MSA_VERTICAL_0                       0x2288
> > +#define MSA_VERTICAL_1                       0x228c
> > +#define MSA_MISC                     0x2290
> > +#define STREAM_CONFIG                        0x2294
> > +#define AUDIO_PACK_STATUS            0x2298
> > +#define VIF_STATUS                   0x229c
> > +#define PCK_STUFF_STATUS_0           0x22a0
> > +#define PCK_STUFF_STATUS_1           0x22a4
> > +#define INFO_PACK_STATUS             0x22a8
> > +#define RATE_GOVERNOR_STATUS         0x22ac
> > +#define DP_HORIZONTAL                        0x22b0
> > +#define DP_VERTICAL_0                        0x22b4
> > +#define DP_VERTICAL_1                        0x22b8
> > +#define DP_BLOCK_SDP                 0x22bc
> > +
> > +/* DPTX glbl addr */
> > +#define DPTX_LANE_EN                 0x2300
> > +#define DPTX_ENHNCD                  0x2304
> > +#define DPTX_INT_MASK                        0x2308
> > +#define DPTX_INT_STATUS                      0x230c
> > +
> > +/* DP AUX Addr */
> > +#define DP_AUX_HOST_CONTROL          0x2800
> > +#define DP_AUX_INTERRUPT_SOURCE              0x2804
> > +#define DP_AUX_INTERRUPT_MASK                0x2808
> > +#define DP_AUX_SWAP_INVERSION_CONTROL        0x280c
> > +#define DP_AUX_SEND_NACK_TRANSACTION 0x2810
> > +#define DP_AUX_CLEAR_RX                      0x2814
> > +#define DP_AUX_CLEAR_TX                      0x2818
> > +#define DP_AUX_TIMER_STOP            0x281c
> > +#define DP_AUX_TIMER_CLEAR           0x2820
> > +#define DP_AUX_RESET_SW                      0x2824
> > +#define DP_AUX_DIVIDE_2M             0x2828
> > +#define DP_AUX_TX_PREACHARGE_LENGTH  0x282c
> > +#define DP_AUX_FREQUENCY_1M_MAX              0x2830
> > +#define DP_AUX_FREQUENCY_1M_MIN              0x2834
> > +#define DP_AUX_RX_PRE_MIN            0x2838
> > +#define DP_AUX_RX_PRE_MAX            0x283c
> > +#define DP_AUX_TIMER_PRESET          0x2840
> > +#define DP_AUX_NACK_FORMAT           0x2844
> > +#define DP_AUX_TX_DATA                       0x2848
> > +#define DP_AUX_RX_DATA                       0x284c
> > +#define DP_AUX_TX_STATUS             0x2850
> > +#define DP_AUX_RX_STATUS             0x2854
> > +#define DP_AUX_RX_CYCLE_COUNTER              0x2858
> > +#define DP_AUX_MAIN_STATES           0x285c
> > +#define DP_AUX_MAIN_TIMER            0x2860
> > +#define DP_AUX_AFE_OUT                       0x2864
> > +
> > +/* source pif addr */
> > +#define SOURCE_PIF_WR_ADDR           0x30800
> > +#define SOURCE_PIF_WR_REQ            0x30804
> > +#define SOURCE_PIF_RD_ADDR           0x30808
> > +#define SOURCE_PIF_RD_REQ            0x3080c
> > +#define SOURCE_PIF_DATA_WR           0x30810
> > +#define SOURCE_PIF_DATA_RD           0x30814
> > +#define SOURCE_PIF_FIFO1_FLUSH               0x30818
> > +#define SOURCE_PIF_FIFO2_FLUSH               0x3081c
> > +#define SOURCE_PIF_STATUS            0x30820
> > +#define SOURCE_PIF_INTERRUPT_SOURCE  0x30824
> > +#define SOURCE_PIF_INTERRUPT_MASK    0x30828
> > +#define SOURCE_PIF_PKT_ALLOC_REG     0x3082c
> > +#define SOURCE_PIF_PKT_ALLOC_WR_EN   0x30830
> > +#define SOURCE_PIF_SW_RESET          0x30834
> > +
> > +#define LINK_TRAINING_NOT_ACTIV              0
> > +#define LINK_TRAINING_RUN            1
> > +#define LINK_TRAINING_RESTART                2
> > +
> > +#define CONTROL_VIDEO_IDLE           0
> > +#define CONTROL_VIDEO_VALID          1
> > +
> > +#define INTERLACE_FMT_DET            BIT(12)
> > +#define VIF_BYPASS_INTERLACE         BIT(13)
> > +#define TU_CNT_RST_EN                        BIT(15)
> > +#define INTERLACE_DTCT_WIN           0x20
> > +
> > +#define DP_FRAMER_SP_INTERLACE_EN    BIT(2)
> > +#define DP_FRAMER_SP_HSP             BIT(1)
> > +#define DP_FRAMER_SP_VSP             BIT(0)
> > +
> > +/* Capability */
> > +#define AUX_HOST_INVERT                      3
> > +#define FAST_LT_SUPPORT                      1
> > +#define FAST_LT_NOT_SUPPORT          0
> > +#define LANE_MAPPING_NORMAL          0x1b
> > +#define LANE_MAPPING_FLIPPED         0xe4
> > +#define LANE_MAPPING_IMX8MQ_DP               0xc6
> > +#define ENHANCED                     1
> > +#define SCRAMBLER_EN                 BIT(4)
> > +
> > +#define FULL_LT_STARTED                      BIT(0)
> > +#define FASE_LT_STARTED                      BIT(1)
> > +#define CLK_RECOVERY_FINISHED                BIT(2)
> > +#define EQ_PHASE_FINISHED            BIT(3)
> > +#define FASE_LT_START_FINISHED               BIT(4)
> > +#define CLK_RECOVERY_FAILED          BIT(5)
> > +#define EQ_PHASE_FAILED                      BIT(6)
> > +#define FASE_LT_FAILED                       BIT(7)
> > +
> > +#define TU_SIZE                              30
> > +#define CDNS_DP_MAX_LINK_RATE                540000
> > +
> > +#define F_HDMI_ENCODING(x) (((x) & ((1 << 2) - 1)) << 16)
> > +#define F_VIF_DATA_WIDTH(x) (((x) & ((1 << 2) - 1)) << 2)
> > +#define F_HDMI_MODE(x) (((x) & ((1 << 2) - 1)) << 0)
> > +#define F_GCP_EN(x) (((x) & ((1 << 1) - 1)) << 12)
> > +#define F_DATA_EN(x) (((x) & ((1 << 1) - 1)) << 15)
> > +#define F_CLEAR_AVMUTE(x) (((x) & ((1 << 1) - 1)) << 14)
> > +#define F_HDMI2_PREAMBLE_EN(x) (((x) & ((1 << 1) - 1)) << 18)
> > +#define F_PIC_3D(x) (((x) & ((1 << 4) - 1)) << 7)
> > +#define F_BCH_EN(x) (((x) & ((1 << 1) - 1)) << 11)
> > +#define F_SOURCE_PHY_MHDP_SEL(x) (((x) & ((1 << 2) - 1)) << 3)
> > +#define F_HPD_VALID_WIDTH(x) (((x) & ((1 << 12) - 1)) << 0)
> > +#define F_HPD_GLITCH_WIDTH(x) (((x) & ((1 << 8) - 1)) << 12)
> > +#define F_HDMI2_CTRL_IL_MODE(x) (((x) & ((1 << 1) - 1)) << 19)
> > +#define F_SOURCE_PHY_LANE0_SWAP(x) (((x) & ((1 << 2) - 1)) << 0)
> > +#define F_SOURCE_PHY_LANE1_SWAP(x) (((x) & ((1 << 2) - 1)) << 2)
> > +#define F_SOURCE_PHY_LANE2_SWAP(x) (((x) & ((1 << 2) - 1)) << 4)
> > +#define F_SOURCE_PHY_LANE3_SWAP(x) (((x) & ((1 << 2) - 1)) << 6)
> > +#define F_SOURCE_PHY_COMB_BYPASS(x) (((x) & ((1 << 1) - 1)) << 21)
> > +#define F_SOURCE_PHY_20_10(x) (((x) & ((1 << 1) - 1)) << 22)
> > +#define F_PKT_ALLOC_ADDRESS(x) (((x) & ((1 << 4) - 1)) << 0)
> > +#define F_ACTIVE_IDLE_TYPE(x) (((x) & ((1 << 1) - 1)) << 17)
> > +#define F_FIFO1_FLUSH(x) (((x) & ((1 << 1) - 1)) << 0)
> > +#define F_PKT_ALLOC_WR_EN(x) (((x) & ((1 << 1) - 1)) << 0)
> > +#define F_DATA_WR(x) (x)
> > +#define F_WR_ADDR(x) (((x) & ((1 << 4) - 1)) << 0)
> > +#define F_HOST_WR(x) (((x) & ((1 << 1) - 1)) << 0)
> > +#define F_TYPE_VALID(x) (((x) & ((1 << 1) - 1)) << 16)
> > +#define F_PACKET_TYPE(x) (((x) & ((1 << 8) - 1)) << 8)
> > +
> > +/* Reference cycles when using lane clock as reference */
> > +#define LANE_REF_CYC                 0x8000
> > +
> > +/* HPD Debounce */
> > +#define HOTPLUG_DEBOUNCE_MS          200
> > +
> > +/* HPD IRQ Index */
> > +#define IRQ_IN    0
> > +#define IRQ_OUT   1
> > +#define IRQ_NUM   2
> > +
> > +/* FW check alive timeout */
> > +#define CDNS_KEEP_ALIVE_TIMEOUT              2000
> > +#define CDNS_KEEP_ALIVE_MASK         GENMASK(7, 0)
> > +
> > +enum voltage_swing_level {
> > +     VOLTAGE_LEVEL_0,
> > +     VOLTAGE_LEVEL_1,
> > +     VOLTAGE_LEVEL_2,
> > +     VOLTAGE_LEVEL_3,
> > +};
> > +
> > +enum pre_emphasis_level {
> > +     PRE_EMPHASIS_LEVEL_0,
> > +     PRE_EMPHASIS_LEVEL_1,
> > +     PRE_EMPHASIS_LEVEL_2,
> > +     PRE_EMPHASIS_LEVEL_3,
> > +};
> > +
> > +enum pattern_set {
> > +     PTS1 = BIT(0),
> > +     PTS2 = BIT(1),
> > +     PTS3 = BIT(2),
> > +     PTS4 = BIT(3),
> > +     DP_NONE = BIT(4)
> > +};
> > +
> > +enum vic_color_depth {
> > +     BCS_6 = 0x1,
> > +     BCS_8 = 0x2,
> > +     BCS_10 = 0x4,
> > +     BCS_12 = 0x8,
> > +     BCS_16 = 0x10,
> > +};
> > +
> > +enum vic_bt_type {
> > +     BT_601 = 0x0,
> > +     BT_709 = 0x1,
> > +};
> > +
> > +enum {
> > +     MODE_DVI,
> > +     MODE_HDMI_1_4,
> > +     MODE_HDMI_2_0,
> > +};
> > +
> > +struct video_info {
> > +     int bpc;
> > +     int color_fmt;
> > +};
> > +
> > +struct mhdp8501_plat_data {
> > +     int hdmi_lane_mapping;
> > +     int dp_lane_mapping;
> > +};
> > +
> > +struct cdns_mhdp8501_device {
> > +     struct cdns_mhdp_base base;
> > +
> > +     struct device *dev;
> > +     void __iomem *regs;
> > +     struct drm_connector *curr_conn;
> > +     struct drm_bridge bridge;
> > +     struct clk *apb_clk;
> > +     struct phy *phy;
> > +
> > +     struct video_info video_info;
> > +     struct drm_display_mode mode;
> > +
> > +     int irq[IRQ_NUM];
> > +     struct delayed_work hotplug_work;
> > +     int connector_type;
> > +     u32 lane_mapping;
> > +
> > +     /* protect mailbox communications with the firmware */
> > +     struct mutex mbox_mutex;
> > +
> > +     const struct mhdp8501_plat_data *plat_data;
> > +
> > +     union {
> > +             struct _dp_data {
> > +                     u32 rate;
> > +                     u8 num_lanes;
> > +                     struct drm_dp_aux aux;
> > +                     u8 dpcd[DP_RECEIVER_CAP_SIZE];
> > +             } dp;
> > +             struct _hdmi_data {
> > +                     u32 hdmi_type;
> > +                     unsigned long long char_rate;
> > +             } hdmi;
> > +     };
> > +};
> > +
> > +extern const struct drm_bridge_funcs cdns_dp_bridge_funcs;
> > +extern const struct drm_bridge_funcs cdns_hdmi_bridge_funcs;
> > +
> > +ssize_t cdns_dp_aux_transfer(struct drm_dp_aux *aux, struct
> drm_dp_aux_msg *msg);
> > +enum drm_connector_status cdns_mhdp8501_detect(struct
> cdns_mhdp8501_device *mhdp);
> > +int cdns_dp_aux_destroy(struct cdns_mhdp8501_device *mhdp);
> > +
> > +#endif
> > diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-dp.c
> b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-dp.c
> > new file mode 100644
> > index 000000000000..d8cc31daf322
> > --- /dev/null
> > +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-dp.c
> > @@ -0,0 +1,700 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> > +/*
> > + * Cadence MHDP8501 DisplayPort(DP) bridge driver
> > + *
> > + * Copyright (C) 2019-2024 NXP Semiconductor, Inc.
> > + *
> > + */
> > +#include <drm/drm_atomic_helper.h>
> > +#include <drm/drm_edid.h>
> > +#include <drm/drm_print.h>
> > +#include <linux/phy/phy.h>
> > +#include <linux/phy/phy-dp.h>
> > +
> > +#include "cdns-mhdp8501-core.h"
> > +
> > +#define LINK_TRAINING_TIMEOUT_MS     500
> > +#define LINK_TRAINING_RETRY_MS               20
> > +
> > +ssize_t cdns_dp_aux_transfer(struct drm_dp_aux *aux,
> > +                          struct drm_dp_aux_msg *msg)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp = dev_get_drvdata(aux->dev);
> > +     bool native = msg->request & (DP_AUX_NATIVE_WRITE &
> DP_AUX_NATIVE_READ);
> > +     int ret;
> > +
> > +     /* Ignore address only message */
> > +     if (!msg->size || !msg->buffer) {
> > +             msg->reply = native ?
> > +                     DP_AUX_NATIVE_REPLY_ACK :
> DP_AUX_I2C_REPLY_ACK;
> > +             return msg->size;
> > +     }
> > +
> > +     if (!native) {
> > +             dev_err(mhdp->dev, "%s: only native messages
> supported\n", __func__);
> > +             return -EINVAL;
> > +     }
> > +
> > +     /* msg sanity check */
> > +     if (msg->size > DP_AUX_MAX_PAYLOAD_BYTES) {
> > +             dev_err(mhdp->dev, "%s: invalid msg: size(%zu),
> request(%x)\n",
> > +                     __func__, msg->size, (unsigned
> int)msg->request);
> > +             return -EINVAL;
> > +     }
> > +
> > +     if (msg->request == DP_AUX_NATIVE_WRITE) {
> > +             const u8 *buf = msg->buffer;
> > +             int i;
> > +
> > +             for (i = 0; i < msg->size; ++i) {
> > +                     ret = cdns_mhdp_dpcd_write(&mhdp->base,
> > +                                                msg->address +
> i, buf[i]);
> > +                     if (ret < 0) {
> > +                             dev_err(mhdp->dev, "Failed to write
> DPCD\n");
> > +                             return ret;
> > +                     }
> > +             }
> > +             msg->reply = DP_AUX_NATIVE_REPLY_ACK;
> > +             return msg->size;
> > +     }
> > +
> > +     if (msg->request == DP_AUX_NATIVE_READ) {
> > +             ret = cdns_mhdp_dpcd_read(&mhdp->base, msg->address,
> > +                                       msg->buffer, msg->size);
> > +             if (ret < 0)
> > +                     return ret;
> > +             msg->reply = DP_AUX_NATIVE_REPLY_ACK;
> > +             return msg->size;
> > +     }
> > +     return 0;
> > +}
> > +
> > +int cdns_dp_aux_destroy(struct cdns_mhdp8501_device *mhdp)
> > +{
> > +     drm_dp_aux_unregister(&mhdp->dp.aux);
> > +
> > +     return 0;
> > +}
> > +
> > +static int cdns_dp_get_msa_misc(struct video_info *video)
> > +{
> > +     u32 msa_misc;
> > +     u8 color_space = 0;
> > +     u8 bpc = 0;
> > +
> > +     switch (video->color_fmt) {
> > +     /* set YUV default color space conversion to BT601 */
> > +     case DRM_COLOR_FORMAT_YCBCR444:
> > +             color_space = 6 + BT_601 * 8;
> > +             break;
> > +     case DRM_COLOR_FORMAT_YCBCR422:
> > +             color_space = 5 + BT_601 * 8;
> > +             break;
> > +     case DRM_COLOR_FORMAT_YCBCR420:
> > +             color_space = 5;
> > +             break;
> > +     case DRM_COLOR_FORMAT_RGB444:
> > +     default:
> > +             color_space = 0;
> > +             break;
> > +     };
> > +
> > +     switch (video->bpc) {
> > +     case 6:
> > +             bpc = 0;
> > +             break;
> > +     case 10:
> > +             bpc = 2;
> > +             break;
> > +     case 12:
> > +             bpc = 3;
> > +             break;
> > +     case 16:
> > +             bpc = 4;
> > +             break;
> > +     case 8:
> > +     default:
> > +             bpc = 1;
> > +             break;
> > +     };
> > +
> > +     msa_misc = (bpc << 5) | (color_space << 1);
> > +
> > +     return msa_misc;
> > +}
> > +
> > +static int cdns_dp_config_video(struct cdns_mhdp8501_device *mhdp)
> > +{
> > +     struct video_info *video = &mhdp->video_info;
> > +     struct drm_display_mode *mode = &mhdp->mode;
> > +     bool h_sync_polarity, v_sync_polarity;
> > +     u64 symbol;
> > +     u32 val, link_rate, rem;
> > +     u8 bit_per_pix, tu_size_reg = TU_SIZE;
> > +     int ret;
> > +
> > +     bit_per_pix = (video->color_fmt ==
> DRM_COLOR_FORMAT_YCBCR422) ?
> > +                   (video->bpc * 2) : (video->bpc * 3);
> > +
> > +     link_rate = mhdp->dp.rate / 1000;
> > +
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, BND_HSYNC2VSYNC,
> VIF_BYPASS_INTERLACE);
> > +     if (ret)
> > +             goto err_config_video;
> > +
> > +     ret = cdns_mhdp_reg_write(&mhdp->base,
> HSYNC2VSYNC_POL_CTRL, 0);
> > +     if (ret)
> > +             goto err_config_video;
> > +
> > +     /*
> > +      * get a best tu_size and valid symbol:
> > +      * 1. chose Lclk freq(162Mhz, 270Mhz, 540Mhz), set TU to 32
> > +      * 2. calculate VS(valid symbol) = TU * Pclk * Bpp / (Lclk * Lanes)
> > +      * 3. if VS > *.85 or VS < *.1 or VS < 2 or TU < VS + 4, then set
> > +      *    TU += 2 and repeat 2nd step.
> > +      */
> > +     do {
> > +             tu_size_reg += 2;
> > +             symbol = tu_size_reg * mode->clock * bit_per_pix;
> > +             do_div(symbol, mhdp->dp.num_lanes * link_rate * 8);
> > +             rem = do_div(symbol, 1000);
> > +             if (tu_size_reg > 64) {
> > +                     ret = -EINVAL;
> > +                     dev_err(mhdp->dev, "tu error, clk:%d, lanes:%d,
> rate:%d\n",
> > +                             mode->clock, mhdp->dp.num_lanes,
> link_rate);
> > +                     goto err_config_video;
> > +             }
> > +     } while ((symbol <= 1) || (tu_size_reg - symbol < 4) ||
> > +              (rem > 850) || (rem < 100));
> > +
> > +     val = symbol + (tu_size_reg << 8);
> > +     val |= TU_CNT_RST_EN;
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, DP_FRAMER_TU, val);
> > +     if (ret)
> > +             goto err_config_video;
> > +
> > +     /* set the FIFO Buffer size */
> > +     val = div_u64(mode->clock * (symbol + 1), 1000) + link_rate;
> > +     val /= (mhdp->dp.num_lanes * link_rate);
> > +     val = div_u64(8 * (symbol + 1), bit_per_pix) - val;
> > +     val += 2;
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, DP_VC_TABLE(15), val);
> > +
> > +     switch (video->bpc) {
> > +     case 6:
> > +             val = BCS_6;
> > +             break;
> > +     case 10:
> > +             val = BCS_10;
> > +             break;
> > +     case 12:
> > +             val = BCS_12;
> > +             break;
> > +     case 16:
> > +             val = BCS_16;
> > +             break;
> > +     case 8:
> > +     default:
> > +             val = BCS_8;
> > +             break;
> > +     };
> > +
> > +     val += video->color_fmt << 8;
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, DP_FRAMER_PXL_REPR,
> val);
> > +     if (ret)
> > +             goto err_config_video;
> > +
> > +     v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
> > +     h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
> > +
> > +     val = h_sync_polarity ? DP_FRAMER_SP_HSP : 0;
> > +     val |= v_sync_polarity ? DP_FRAMER_SP_VSP : 0;
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, DP_FRAMER_SP, val);
> > +     if (ret)
> > +             goto err_config_video;
> > +
> > +     val = (mode->hsync_start - mode->hdisplay) << 16;
> > +     val |= mode->htotal - mode->hsync_end;
> > +     ret = cdns_mhdp_reg_write(&mhdp->base,
> DP_FRONT_BACK_PORCH, val);
> > +     if (ret)
> > +             goto err_config_video;
> > +
> > +     val = mode->hdisplay * bit_per_pix / 8;
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, DP_BYTE_COUNT, val);
> > +     if (ret)
> > +             goto err_config_video;
> > +
> > +     val = mode->htotal | ((mode->htotal - mode->hsync_start) << 16);
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, MSA_HORIZONTAL_0,
> val);
> > +     if (ret)
> > +             goto err_config_video;
> > +
> > +     val = mode->hsync_end - mode->hsync_start;
> > +     val |= (mode->hdisplay << 16) | (h_sync_polarity << 15);
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, MSA_HORIZONTAL_1,
> val);
> > +     if (ret)
> > +             goto err_config_video;
> > +
> > +     val = mode->vtotal;
> > +     val |= (mode->vtotal - mode->vsync_start) << 16;
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, MSA_VERTICAL_0, val);
> > +     if (ret)
> > +             goto err_config_video;
> > +
> > +     val = mode->vsync_end - mode->vsync_start;
> > +     val |= (mode->vdisplay << 16) | (v_sync_polarity << 15);
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, MSA_VERTICAL_1, val);
> > +     if (ret)
> > +             goto err_config_video;
> > +
> > +     val = cdns_dp_get_msa_misc(video);
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, MSA_MISC, val);
> > +     if (ret)
> > +             goto err_config_video;
> > +
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, STREAM_CONFIG, 1);
> > +     if (ret)
> > +             goto err_config_video;
> > +
> > +     val = mode->hsync_end - mode->hsync_start;
> > +     val |= mode->hdisplay << 16;
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, DP_HORIZONTAL, val);
> > +     if (ret)
> > +             goto err_config_video;
> > +
> > +     val = mode->vdisplay;
> > +     val |= (mode->vtotal - mode->vsync_start) << 16;
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, DP_VERTICAL_0, val);
> > +     if (ret)
> > +             goto err_config_video;
> > +
> > +     val = mode->vtotal;
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, DP_VERTICAL_1, val);
> > +     if (ret)
> > +             goto err_config_video;
> > +
> > +     ret = cdns_mhdp_dp_reg_write_bit(&mhdp->base, DP_VB_ID, 2, 1,
> 0);
> > +
> > +err_config_video:
> > +     if (ret)
> > +             dev_err(mhdp->dev, "config video failed: %d\n", ret);
> > +     return ret;
> > +}
> > +
> > +static void cdns_dp_pixel_clk_reset(struct cdns_mhdp8501_device *mhdp)
> > +{
> > +     u32 val;
> > +
> > +     /* reset pixel clk */
> > +     cdns_mhdp_reg_read(&mhdp->base, SOURCE_HDTX_CAR, &val);
> > +     cdns_mhdp_reg_write(&mhdp->base, SOURCE_HDTX_CAR, val &
> 0xFD);
> > +     cdns_mhdp_reg_write(&mhdp->base, SOURCE_HDTX_CAR, val);
> > +}
> > +
> > +static int cdns_dp_set_video_status(struct cdns_mhdp8501_device *mhdp,
> int active)
> > +{
> > +     u8 msg;
> > +     int ret;
> > +
> > +     msg = !!active;
> > +
> > +     mutex_lock(&mhdp->mbox_mutex);
> > +
> > +     ret = cdns_mhdp_mailbox_send(&mhdp->base,
> MB_MODULE_ID_DP_TX, DPTX_SET_VIDEO,
> > +                                  sizeof(msg), &msg);
> > +     if (ret)
> > +             dev_err(mhdp->dev, "set video status failed: %d\n", ret);
> > +
> > +     mutex_unlock(&mhdp->mbox_mutex);
> > +
> > +     return ret;
> > +}
> > +
> > +static int cdns_dp_training_start(struct cdns_mhdp8501_device *mhdp)
> > +{
> > +     unsigned long timeout;
> > +     u8 msg, event[2];
> > +     int ret;
> > +
> > +     msg = LINK_TRAINING_RUN;
> > +
> > +     mutex_lock(&mhdp->mbox_mutex);
> > +
> > +     /* start training */
> > +     ret = cdns_mhdp_mailbox_send(&mhdp->base,
> MB_MODULE_ID_DP_TX,
> > +                                  DPTX_TRAINING_CONTROL,
> sizeof(msg), &msg);
> > +     if (ret)
> > +             goto err_training_start;
> > +
> > +     timeout = jiffies + msecs_to_jiffies(LINK_TRAINING_TIMEOUT_MS);
> > +     while (time_before(jiffies, timeout)) {
> > +             msleep(LINK_TRAINING_RETRY_MS);
> > +             ret = cdns_mhdp_mailbox_send(&mhdp->base,
> MB_MODULE_ID_DP_TX,
> > +                                          DPTX_READ_EVENT, 0,
> NULL);
> > +             if (ret)
> > +                     goto err_training_start;
> > +
> > +             ret = cdns_mhdp_mailbox_recv_header(&mhdp->base,
> MB_MODULE_ID_DP_TX,
> > +
> DPTX_READ_EVENT, sizeof(event));
> > +             if (ret)
> > +                     goto err_training_start;
> > +
> > +             ret = cdns_mhdp_mailbox_recv_data(&mhdp->base, event,
> sizeof(event));
> > +             if (ret)
> > +                     goto err_training_start;
> > +
> > +             if (event[1] & CLK_RECOVERY_FAILED) {
> > +                     dev_err(mhdp->dev, "clock recovery failed\n");
> > +             } else if (event[1] & EQ_PHASE_FINISHED) {
> > +                     mutex_unlock(&mhdp->mbox_mutex);
> > +                     return 0;
> > +             }
> > +     }
> > +
> > +     ret = -ETIMEDOUT;
> > +
> > +err_training_start:
> > +     mutex_unlock(&mhdp->mbox_mutex);
> > +
> > +     dev_err(mhdp->dev, "training failed: %d\n", ret);
> > +     return ret;
> > +}
> > +
> > +static int cdns_dp_get_training_status(struct cdns_mhdp8501_device
> *mhdp)
> > +{
> > +     u8 status[13];
> > +     int ret;
> > +
> > +     mutex_lock(&mhdp->mbox_mutex);
> > +
> > +     ret = cdns_mhdp_mailbox_send(&mhdp->base,
> MB_MODULE_ID_DP_TX,
> > +                                  DPTX_READ_LINK_STAT, 0,
> NULL);
> > +     if (ret)
> > +             goto err_get_training_status;
> > +
> > +     ret = cdns_mhdp_mailbox_recv_header(&mhdp->base,
> MB_MODULE_ID_DP_TX,
> > +                                         DPTX_READ_LINK_STAT,
> > +                                         sizeof(status));
> > +     if (ret)
> > +             goto err_get_training_status;
> > +
> > +     ret = cdns_mhdp_mailbox_recv_data(&mhdp->base, status,
> sizeof(status));
> > +     if (ret)
> > +             goto err_get_training_status;
> > +
> > +     mhdp->dp.rate = drm_dp_bw_code_to_link_rate(status[0]);
> > +     mhdp->dp.num_lanes = status[1];
> > +
> > +err_get_training_status:
> > +     mutex_unlock(&mhdp->mbox_mutex);
> > +
> > +     if (ret)
> > +             dev_err(mhdp->dev, "get training status failed: %d\n", ret);
> > +     return ret;
> > +}
> > +
> > +static int cdns_dp_train_link(struct cdns_mhdp8501_device *mhdp)
> > +{
> > +     int ret;
> > +
> > +     ret = cdns_dp_training_start(mhdp);
> > +     if (ret) {
> > +             dev_err(mhdp->dev, "Failed to start training %d\n", ret);
> > +             return ret;
> > +     }
> > +
> > +     ret = cdns_dp_get_training_status(mhdp);
> > +     if (ret) {
> > +             dev_err(mhdp->dev, "Failed to get training stat %d\n",
> ret);
> > +             return ret;
> > +     }
> > +
> > +     dev_dbg(mhdp->dev, "rate:0x%x, lanes:%d\n", mhdp->dp.rate,
> > +             mhdp->dp.num_lanes);
> > +     return ret;
> > +}
> > +
> > +static int cdns_dp_set_host_cap(struct cdns_mhdp8501_device *mhdp)
> > +{
> > +     u8 msg[8];
> > +     int ret;
> > +
> > +     msg[0] = drm_dp_link_rate_to_bw_code(mhdp->dp.rate);
> > +     msg[1] = mhdp->dp.num_lanes | SCRAMBLER_EN;
> > +     msg[2] = VOLTAGE_LEVEL_2;
> > +     msg[3] = PRE_EMPHASIS_LEVEL_3;
> > +     msg[4] = PTS1 | PTS2 | PTS3 | PTS4;
> > +     msg[5] = FAST_LT_NOT_SUPPORT;
> > +     msg[6] = mhdp->lane_mapping;
> > +     msg[7] = ENHANCED;
> > +
> > +     mutex_lock(&mhdp->mbox_mutex);
> > +
> > +     ret = cdns_mhdp_mailbox_send(&mhdp->base,
> MB_MODULE_ID_DP_TX,
> > +                                  DPTX_SET_HOST_CAPABILITIES,
> > +                                  sizeof(msg), msg);
> > +
> > +     mutex_unlock(&mhdp->mbox_mutex);
> > +
> > +     if (ret)
> > +             dev_err(mhdp->dev, "set host cap failed: %d\n", ret);
> > +
> > +     return ret;
> > +}
> > +
> > +static int cdns_dp_get_edid_block(void *data, u8 *edid,
> > +                               unsigned int block, size_t length)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp = data;
> > +     u8 msg[2], reg[2], i;
> > +     int ret;
> > +
> > +     mutex_lock(&mhdp->mbox_mutex);
> > +
> > +     for (i = 0; i < 4; i++) {
> > +             msg[0] = block / 2;
> > +             msg[1] = block % 2;
> > +
> > +             ret = cdns_mhdp_mailbox_send(&mhdp->base,
> MB_MODULE_ID_DP_TX,
> > +                                          DPTX_GET_EDID,
> sizeof(msg), msg);
> > +             if (ret)
> > +                     continue;
> > +
> > +             ret = cdns_mhdp_mailbox_recv_header(&mhdp->base,
> MB_MODULE_ID_DP_TX,
> > +
> DPTX_GET_EDID,
> > +                                                 sizeof(reg) +
> length);
> > +             if (ret)
> > +                     continue;
> > +
> > +             ret = cdns_mhdp_mailbox_recv_data(&mhdp->base, reg,
> sizeof(reg));
> > +             if (ret)
> > +                     continue;
> > +
> > +             ret = cdns_mhdp_mailbox_recv_data(&mhdp->base, edid,
> length);
> > +             if (ret)
> > +                     continue;
> > +
> > +             if (reg[0] == length && reg[1] == block / 2)
> > +                     break;
> > +     }
> > +
> > +     if (ret)
> > +             dev_err(mhdp->dev, "get block[%d] edid failed: %d\n",
> block, ret);
> > +
> > +     mutex_unlock(&mhdp->mbox_mutex);
> > +     return ret;
> > +}
> > +
> > +static void cdns_dp_mode_set(struct cdns_mhdp8501_device *mhdp)
> > +{
> > +     union phy_configure_opts phy_cfg;
> > +     int ret;
> > +
> > +     cdns_dp_pixel_clk_reset(mhdp);
> > +
> > +     /* Get DP Caps  */
> > +     ret = drm_dp_dpcd_read(&mhdp->dp.aux, DP_DPCD_REV,
> mhdp->dp.dpcd,
> > +                            DP_RECEIVER_CAP_SIZE);
> > +     if (ret < 0) {
> > +             dev_err(mhdp->dev, "Failed to get caps %d\n", ret);
> > +             return;
> > +     }
> > +
> > +     mhdp->dp.rate = drm_dp_max_link_rate(mhdp->dp.dpcd);
> > +     mhdp->dp.num_lanes = drm_dp_max_lane_count(mhdp->dp.dpcd);
> > +
> > +     /* check the max link rate */
> > +     if (mhdp->dp.rate > CDNS_DP_MAX_LINK_RATE)
> > +             mhdp->dp.rate = CDNS_DP_MAX_LINK_RATE;
> > +
> > +     phy_cfg.dp.lanes = mhdp->dp.num_lanes;
> > +     phy_cfg.dp.link_rate = mhdp->dp.rate;
> > +     phy_cfg.dp.set_lanes = false;
> > +     phy_cfg.dp.set_rate = false;
> > +     phy_cfg.dp.set_voltages = true;
> > +
> > +     /* Mailbox protect for DP PHY access */
> > +     mutex_lock(&mhdp->mbox_mutex);
> > +     ret = phy_configure(mhdp->phy, &phy_cfg);
> > +     mutex_unlock(&mhdp->mbox_mutex);
> > +     if (ret) {
> > +             dev_err(mhdp->dev, "%s: phy_configure() failed: %d\n",
> > +                     __func__, ret);
> > +             return;
> > +     }
> > +
> > +     /* Video off */
> > +     ret = cdns_dp_set_video_status(mhdp, CONTROL_VIDEO_IDLE);
> > +     if (ret) {
> > +             dev_err(mhdp->dev, "Failed to valid video %d\n", ret);
> > +             return;
> > +     }
> > +
> > +     /* Line swapping */
> > +     cdns_mhdp_reg_write(&mhdp->base, LANES_CONFIG, 0x00400000
> | mhdp->lane_mapping);
> > +
> > +     /* Set DP host capability */
> > +     ret = cdns_dp_set_host_cap(mhdp);
> > +     if (ret) {
> > +             dev_err(mhdp->dev, "Failed to set host cap %d\n", ret);
> > +             return;
> > +     }
> > +
> > +     ret = cdns_mhdp_reg_write(&mhdp->base,
> DP_AUX_SWAP_INVERSION_CONTROL,
> > +                               AUX_HOST_INVERT);
> > +     if (ret) {
> > +             dev_err(mhdp->dev, "Failed to set host invert %d\n", ret);
> > +             return;
> > +     }
> > +
> > +     ret = cdns_dp_config_video(mhdp);
> > +     if (ret)
> > +             dev_err(mhdp->dev, "Failed to config video %d\n", ret);
> > +}
> > +
> > +static int cdns_dp_bridge_attach(struct drm_bridge *bridge,
> > +                              enum drm_bridge_attach_flags flags)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp = bridge->driver_private;
> > +
> > +     if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
> > +             dev_err(mhdp->dev, "do not support creating a
> drm_connector\n");
> > +             return -EINVAL;
> > +     }
> > +
> > +     mhdp->dp.aux.drm_dev = bridge->dev;
> > +
> > +     return drm_dp_aux_register(&mhdp->dp.aux);
> > +}
> > +
> > +static enum drm_mode_status
> > +cdns_dp_bridge_mode_valid(struct drm_bridge *bridge,
> > +                       const struct drm_display_info *info,
> > +                       const struct drm_display_mode *mode)
> > +{
> > +     enum drm_mode_status mode_status = MODE_OK;
> > +
> > +     /* We don't support double-clocked modes */
> > +     if (mode->flags & DRM_MODE_FLAG_DBLCLK ||
> > +         mode->flags & DRM_MODE_FLAG_INTERLACE)
> > +             return MODE_BAD;
> > +
> > +     /* MAX support pixel clock rate 594MHz */
> > +     if (mode->clock > 594000)
> > +             return MODE_CLOCK_HIGH;
> > +
> > +     if (mode->hdisplay > 3840)
> > +             return MODE_BAD_HVALUE;
> > +
> > +     if (mode->vdisplay > 2160)
> > +             return MODE_BAD_VVALUE;
> > +
> > +     return mode_status;
> > +}
> > +
> > +static enum drm_connector_status
> > +cdns_dp_bridge_detect(struct drm_bridge *bridge)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp = bridge->driver_private;
> > +
> > +     return cdns_mhdp8501_detect(mhdp);
> > +}
> > +
> > +static const struct drm_edid
> > +*cdns_dp_bridge_edid_read(struct drm_bridge *bridge,
> > +                       struct drm_connector *connector)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp = bridge->driver_private;
> > +
> > +     return drm_edid_read_custom(connector, cdns_dp_get_edid_block,
> mhdp);
> > +}
> > +
> > +static void cdns_dp_bridge_atomic_disable(struct drm_bridge *bridge,
> > +                                       struct drm_bridge_state
> *old_state)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp = bridge->driver_private;
> > +
> > +     cdns_dp_set_video_status(mhdp, CONTROL_VIDEO_IDLE);
> > +     mhdp->curr_conn = NULL;
> > +
> > +     /* Mailbox protect for DP PHY access */
> > +     mutex_lock(&mhdp->mbox_mutex);
> > +     phy_power_off(mhdp->phy);
> > +     mutex_unlock(&mhdp->mbox_mutex);
> > +}
> > +
> > +static void cdns_dp_bridge_atomic_enable(struct drm_bridge *bridge,
> > +                                      struct drm_bridge_state
> *old_state)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp = bridge->driver_private;
> > +     struct drm_atomic_state *state = old_state->base.state;
> > +     struct drm_connector *connector;
> > +     struct video_info *video = &mhdp->video_info;
> > +     struct drm_crtc_state *crtc_state;
> > +     struct drm_connector_state *conn_state;
> > +     const struct drm_display_mode *mode;
> > +     int ret;
> > +
> > +     connector = drm_atomic_get_new_connector_for_encoder(state,
> > +
> bridge->encoder);
> > +     if (WARN_ON(!connector))
> > +             return;
> > +
> > +     mhdp->curr_conn = connector;
> > +
> > +     conn_state = drm_atomic_get_new_connector_state(state,
> connector);
> > +     if (WARN_ON(!conn_state))
> > +             return;
> > +
> > +     crtc_state = drm_atomic_get_new_crtc_state(state,
> conn_state->crtc);
> > +     if (WARN_ON(!crtc_state))
> > +             return;
> > +
> > +     mode = &crtc_state->adjusted_mode;
> > +
> > +     switch (connector->display_info.bpc) {
> > +     case 10:
> > +             video->bpc = 10;
> > +             break;
> > +     case 6:
> > +             video->bpc = 6;
> > +             break;
> > +     default:
> > +             video->bpc = 8;
> > +             break;
> > +     }
> > +
> > +     /* The only currently supported format */
> > +     video->color_fmt = DRM_COLOR_FORMAT_RGB444;
> > +
> > +     dev_dbg(mhdp->dev, "Mode: %dx%dp%d\n",
> > +             mode->hdisplay, mode->vdisplay, mode->clock);
> > +     memcpy(&mhdp->mode, mode, sizeof(struct drm_display_mode));
> > +
> > +     cdns_dp_mode_set(mhdp);
> > +
> > +     /* Link trainning */
> > +     ret = cdns_dp_train_link(mhdp);
> > +     if (ret) {
> > +             dev_err(mhdp->dev, "Failed link train %d\n", ret);
> > +             return;
> > +     }
> > +
> > +     ret = cdns_dp_set_video_status(mhdp, CONTROL_VIDEO_VALID);
> > +     if (ret) {
> > +             dev_err(mhdp->dev, "Failed to valid video %d\n", ret);
> > +             return;
> > +     }
> > +}
> > +
> > +const struct drm_bridge_funcs cdns_dp_bridge_funcs = {
> > +     .attach = cdns_dp_bridge_attach,
> > +     .detect = cdns_dp_bridge_detect,
> > +     .edid_read = cdns_dp_bridge_edid_read,
> > +     .mode_valid = cdns_dp_bridge_mode_valid,
> > +     .atomic_enable = cdns_dp_bridge_atomic_enable,
> > +     .atomic_disable = cdns_dp_bridge_atomic_disable,
> > +     .atomic_duplicate_state =
> drm_atomic_helper_bridge_duplicate_state,
> > +     .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
> > +     .atomic_reset = drm_atomic_helper_bridge_reset,
> > +};
> > diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-hdmi.c
> b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-hdmi.c
> > new file mode 100644
> > index 000000000000..834ca9788a5f
> > --- /dev/null
> > +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8501-hdmi.c
> > @@ -0,0 +1,595 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> > +/*
> > + * Cadence MHDP8501 HDMI bridge driver
> > + *
> > + * Copyright (C) 2019-2024 NXP Semiconductor, Inc.
> > + *
> > + */
> > +#include <drm/display/drm_hdmi_helper.h>
> > +#include <drm/display/drm_hdmi_state_helper.h>
> > +#include <drm/display/drm_scdc_helper.h>
> > +#include <drm/drm_atomic_helper.h>
> > +#include <drm/drm_edid.h>
> > +#include <drm/drm_print.h>
> > +#include <linux/phy/phy.h>
> > +#include <linux/phy/phy-hdmi.h>
> > +
> > +#include "cdns-mhdp8501-core.h"
> > +
> > +/**
> > + * cdns_hdmi_config_infoframe() - fill the HDMI infoframe
> > + * @mhdp: phandle to mhdp device.
> > + * @entry_id: The packet memory address in which the data is written.
> > + * @len: length of infoframe.
> > + * @buf: point to InfoFrame Packet.
> > + * @type: Packet Type of InfoFrame in HDMI Specification.
> > + *
> > + */
> > +static void cdns_hdmi_config_infoframe(struct cdns_mhdp8501_device
> *mhdp,
> > +                                    u8 entry_id, u8 len,
> > +                                    const u8 *buf, u8 type)
> > +{
> > +     u8 packet[32], packet_len = 32;
> > +     u32 packet32, len32;
> > +     u32 val, i;
> > +
> > +     /*
> > +      * only support 32 bytes now
> > +      * packet[0] = 0
> > +      * packet[1-3] = HB[0-2]  InfoFrame Packet Header
> > +      * packet[4-31 = PB[0-27] InfoFrame Packet Contents
> > +      */
> > +     if (len >= (packet_len - 1))
> > +             return;
> > +     packet[0] = 0;
> > +     memcpy(packet + 1, buf, len);
> > +
> > +     /* invalidate entry */
> > +     val = F_ACTIVE_IDLE_TYPE(1) | F_PKT_ALLOC_ADDRESS(entry_id);
> > +     writel(val, mhdp->regs + SOURCE_PIF_PKT_ALLOC_REG);
> > +     writel(F_PKT_ALLOC_WR_EN(1), mhdp->regs +
> SOURCE_PIF_PKT_ALLOC_WR_EN);
> > +
> > +     /* flush fifo 1 */
> > +     writel(F_FIFO1_FLUSH(1), mhdp->regs + SOURCE_PIF_FIFO1_FLUSH);
> > +
> > +     /* write packet into memory */
> > +     len32 = packet_len / 4;
> > +     for (i = 0; i < len32; i++) {
> > +             packet32 = get_unaligned_le32(packet + 4 * i);
> > +             writel(F_DATA_WR(packet32), mhdp->regs +
> SOURCE_PIF_DATA_WR);
> > +     }
> > +
> > +     /* write entry id */
> > +     writel(F_WR_ADDR(entry_id), mhdp->regs +
> SOURCE_PIF_WR_ADDR);
> > +
> > +     /* write request */
> > +     writel(F_HOST_WR(1), mhdp->regs + SOURCE_PIF_WR_REQ);
> > +
> > +     /* update entry */
> > +     val = F_ACTIVE_IDLE_TYPE(1) | F_TYPE_VALID(1) |
> > +             F_PACKET_TYPE(type) |
> F_PKT_ALLOC_ADDRESS(entry_id);
> > +     writel(val, mhdp->regs + SOURCE_PIF_PKT_ALLOC_REG);
> > +
> > +     writel(F_PKT_ALLOC_WR_EN(1), mhdp->regs +
> SOURCE_PIF_PKT_ALLOC_WR_EN);
> > +}
> > +
> > +static int cdns_hdmi_get_edid_block(void *data, u8 *edid,
> > +                                 u32 block, size_t length)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp = data;
> > +     u8 msg[2], reg[5], i;
> > +     int ret;
> > +
> > +     mutex_lock(&mhdp->mbox_mutex);
> > +
> > +     for (i = 0; i < 4; i++) {
> > +             msg[0] = block / 2;
> > +             msg[1] = block % 2;
> > +
> > +             ret = cdns_mhdp_mailbox_send(&mhdp->base,
> MB_MODULE_ID_HDMI_TX, HDMI_TX_EDID,
> > +                                          sizeof(msg), msg);
> > +             if (ret)
> > +                     continue;
> > +
> > +             ret = cdns_mhdp_mailbox_recv_header(&mhdp->base,
> MB_MODULE_ID_HDMI_TX,
> > +
> HDMI_TX_EDID, sizeof(reg) + length);
> > +             if (ret)
> > +                     continue;
> > +
> > +             ret = cdns_mhdp_mailbox_recv_data(&mhdp->base, reg,
> sizeof(reg));
> > +             if (ret)
> > +                     continue;
> > +
> > +             ret = cdns_mhdp_mailbox_recv_data(&mhdp->base, edid,
> length);
> > +             if (ret)
> > +                     continue;
> > +
> > +             if ((reg[3] << 8 | reg[4]) == length)
> > +                     break;
> > +     }
> > +
> > +     mutex_unlock(&mhdp->mbox_mutex);
> > +
> > +     if (ret)
> > +             dev_err(mhdp->dev, "get block[%d] edid failed: %d\n",
> block, ret);
> > +     return ret;
> > +}
> > +
> > +static int cdns_hdmi_scdc_write(struct cdns_mhdp8501_device *mhdp, u8
> addr, u8 value)
> > +{
> > +     u8 msg[5], reg[5];
> > +     int ret;
> > +
> > +     msg[0] = 0x54;
> > +     msg[1] = addr;
> > +     msg[2] = 0;
> > +     msg[3] = 1;
> > +     msg[4] = value;
> > +
> > +     mutex_lock(&mhdp->mbox_mutex);
> > +
> > +     ret = cdns_mhdp_mailbox_send(&mhdp->base,
> MB_MODULE_ID_HDMI_TX, HDMI_TX_WRITE,
> > +                                  sizeof(msg), msg);
> > +     if (ret)
> > +             goto err_scdc_write;
> > +
> > +     ret = cdns_mhdp_mailbox_recv_header(&mhdp->base,
> MB_MODULE_ID_HDMI_TX,
> > +                                         HDMI_TX_WRITE,
> sizeof(reg));
> > +     if (ret)
> > +             goto err_scdc_write;
> > +
> > +     ret = cdns_mhdp_mailbox_recv_data(&mhdp->base, reg,
> sizeof(reg));
> > +     if (ret)
> > +             goto err_scdc_write;
> > +
> > +     if (reg[0] != 0)
> > +             ret = -EINVAL;
> > +
> > +err_scdc_write:
> > +
> > +     mutex_unlock(&mhdp->mbox_mutex);
> > +
> > +     if (ret)
> > +             dev_err(mhdp->dev, "scdc write failed: %d\n", ret);
> > +     return ret;
> > +}
> > +
> > +static int cdns_hdmi_ctrl_init(struct cdns_mhdp8501_device *mhdp)
> > +{
> > +     unsigned long long char_rate = mhdp->hdmi.char_rate;
> > +     u32 protocol = mhdp->hdmi.hdmi_type;
> > +     u32 reg0, reg1, val;
> > +     int ret;
> > +
> > +     /* Set PHY to HDMI data */
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, PHY_DATA_SEL,
> F_SOURCE_PHY_MHDP_SEL(1));
> > +     if (ret < 0)
> > +             return ret;
> > +
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, HDTX_HPD,
> > +                               F_HPD_VALID_WIDTH(4) |
> F_HPD_GLITCH_WIDTH(0));
> > +     if (ret < 0)
> > +             return ret;
> > +
> > +     /* open CARS */
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, SOURCE_PHY_CAR, 0xF);
> > +     if (ret < 0)
> > +             return ret;
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, SOURCE_HDTX_CAR,
> 0xFF);
> > +     if (ret < 0)
> > +             return ret;
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, SOURCE_PKT_CAR, 0xF);
> > +     if (ret < 0)
> > +             return ret;
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, SOURCE_AIF_CAR, 0xF);
> > +     if (ret < 0)
> > +             return ret;
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, SOURCE_CIPHER_CAR,
> 0xF);
> > +     if (ret < 0)
> > +             return ret;
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, SOURCE_CRYPTO_CAR,
> 0xF);
> > +     if (ret < 0)
> > +             return ret;
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, SOURCE_CEC_CAR, 3);
> > +     if (ret < 0)
> > +             return ret;
> > +
> > +     reg0 = 0x7c1f;
> > +     reg1 = 0x7c1f;
> > +     if (protocol == MODE_HDMI_2_0 && char_rate >= 340000000) {
> > +             reg0 = 0;
> > +             reg1 = 0xFFFFF;
> > +     }
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, HDTX_CLOCK_REG_0,
> reg0);
> > +     if (ret < 0)
> > +             return ret;
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, HDTX_CLOCK_REG_1,
> reg1);
> > +     if (ret < 0)
> > +             return ret;
> > +
> > +     /* set HDMI mode and preemble mode data enable */
> > +     val = F_HDMI_MODE(protocol) | F_HDMI2_PREAMBLE_EN(1) |
> > +           F_DATA_EN(1) | F_HDMI2_CTRL_IL_MODE(1) | F_BCH_EN(1)
> |
> > +           F_PIC_3D(0XF) | F_CLEAR_AVMUTE(1);
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, HDTX_CONTROLLER,
> val);
> > +
> > +     return ret;
> > +}
> > +
> > +static int cdns_hdmi_mode_config(struct cdns_mhdp8501_device *mhdp,
> > +                              struct drm_display_mode *mode,
> > +                              struct video_info *video_info)
> > +{
> > +     u32 vsync_lines = mode->vsync_end - mode->vsync_start;
> > +     u32 eof_lines = mode->vsync_start - mode->vdisplay;
> > +     u32 sof_lines = mode->vtotal - mode->vsync_end;
> > +     u32 hblank = mode->htotal - mode->hdisplay;
> > +     u32 hactive = mode->hdisplay;
> > +     u32 vblank = mode->vtotal - mode->vdisplay;
> > +     u32 vactive = mode->vdisplay;
> > +     u32 hfront = mode->hsync_start - mode->hdisplay;
> > +     u32 hback = mode->htotal - mode->hsync_end;
> > +     u32 vfront = eof_lines;
> > +     u32 hsync = hblank - hfront - hback;
> > +     u32 vsync = vsync_lines;
> > +     u32 vback = sof_lines;
> > +     u32 v_h_polarity = ((mode->flags & DRM_MODE_FLAG_NHSYNC) ?
> 0 : 1) +
> > +                        ((mode->flags &
> DRM_MODE_FLAG_NVSYNC) ? 0 : 2);
> > +     int ret;
> > +     u32 val;
> > +
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, SCHEDULER_H_SIZE,
> (hactive << 16) + hblank);
> > +     if (ret < 0)
> > +             return ret;
> > +
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, SCHEDULER_V_SIZE,
> (vactive << 16) + vblank);
> > +     if (ret < 0)
> > +             return ret;
> > +
> > +     ret = cdns_mhdp_reg_write(&mhdp->base,
> HDTX_SIGNAL_FRONT_WIDTH, (vfront << 16) + hfront);
> > +     if (ret < 0)
> > +             return ret;
> > +
> > +     ret = cdns_mhdp_reg_write(&mhdp->base,
> HDTX_SIGNAL_SYNC_WIDTH, (vsync << 16) + hsync);
> > +     if (ret < 0)
> > +             return ret;
> > +
> > +     ret = cdns_mhdp_reg_write(&mhdp->base,
> HDTX_SIGNAL_BACK_WIDTH, (vback << 16) + hback);
> > +     if (ret < 0)
> > +             return ret;
> > +
> > +     ret = cdns_mhdp_reg_write(&mhdp->base,
> HSYNC2VSYNC_POL_CTRL, v_h_polarity);
> > +     if (ret < 0)
> > +             return ret;
> > +
> > +     /* Reset Data Enable */
> > +     cdns_mhdp_reg_read(&mhdp->base, HDTX_CONTROLLER, &val);
> > +     val &= ~F_DATA_EN(1);
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, HDTX_CONTROLLER,
> val);
> > +     if (ret < 0)
> > +             return ret;
> > +
> > +     /* Set bpc */
> > +     val &= ~F_VIF_DATA_WIDTH(3);
> > +     switch (video_info->bpc) {
> > +     case 10:
> > +             val |= F_VIF_DATA_WIDTH(1);
> > +             break;
> > +     case 12:
> > +             val |= F_VIF_DATA_WIDTH(2);
> > +             break;
> > +     case 16:
> > +             val |= F_VIF_DATA_WIDTH(3);
> > +             break;
> > +     case 8:
> > +     default:
> > +             val |= F_VIF_DATA_WIDTH(0);
> > +             break;
> > +     }
> > +
> > +     /* select color encoding */
> > +     val &= ~F_HDMI_ENCODING(3);
> > +     switch (video_info->color_fmt) {
> > +     case HDMI_COLORSPACE_YUV444:
> > +             val |= F_HDMI_ENCODING(2);
> > +             break;
> > +     case HDMI_COLORSPACE_YUV422:
> > +             val |= F_HDMI_ENCODING(1);
> > +             break;
> > +     case HDMI_COLORSPACE_YUV420:
> > +             val |= F_HDMI_ENCODING(3);
> > +             break;
> > +     case HDMI_COLORSPACE_RGB:
> > +     default:
> > +             val |= F_HDMI_ENCODING(0);
> > +             break;
> > +     }
> > +
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, HDTX_CONTROLLER,
> val);
> > +     if (ret < 0)
> > +             return ret;
> > +
> > +     /* set data enable */
> > +     val |= F_DATA_EN(1);
> > +     ret = cdns_mhdp_reg_write(&mhdp->base, HDTX_CONTROLLER,
> val);
> > +
> > +     return ret;
> > +}
> > +
> > +static int cdns_hdmi_disable_gcp(struct cdns_mhdp8501_device *mhdp)
> > +{
> > +     u32 val;
> > +
> > +     cdns_mhdp_reg_read(&mhdp->base, HDTX_CONTROLLER, &val);
> > +     val &= ~F_GCP_EN(1);
> > +
> > +     return cdns_mhdp_reg_write(&mhdp->base, HDTX_CONTROLLER,
> val);
> > +}
> > +
> > +static int cdns_hdmi_enable_gcp(struct cdns_mhdp8501_device *mhdp)
> > +{
> > +     u32 val;
> > +
> > +     cdns_mhdp_reg_read(&mhdp->base, HDTX_CONTROLLER, &val);
> > +     val |= F_GCP_EN(1);
> > +
> > +     return cdns_mhdp_reg_write(&mhdp->base, HDTX_CONTROLLER,
> val);
> > +}
> > +
> > +static void cdns_hdmi_sink_config(struct cdns_mhdp8501_device *mhdp)
> > +{
> > +     struct drm_scdc *scdc =
> &mhdp->curr_conn->display_info.hdmi.scdc;
> > +     u8 buff = 0;
> > +
> > +     /* Default work in HDMI1.4 */
> > +     mhdp->hdmi.hdmi_type = MODE_HDMI_1_4;
> > +
> > +     /* check sink support SCDC or not */
> > +     if (!scdc->supported) {
> > +             dev_info(mhdp->dev, "Sink Not Support SCDC\n");
> > +             return;
> > +     }
> > +
> > +     if (mhdp->hdmi.char_rate > 340000000) {
> > +             /*
> > +              * TMDS Character Rate above 340MHz should working in
> HDMI2.0
> > +              * Enable scrambling and TMDS_Bit_Clock_Ratio
> > +              */
> > +             buff = SCDC_TMDS_BIT_CLOCK_RATIO_BY_40 |
> SCDC_SCRAMBLING_ENABLE;
> > +             mhdp->hdmi.hdmi_type = MODE_HDMI_2_0;
> > +     } else if (scdc->scrambling.low_rates) {
> > +             /*
> > +              * Enable scrambling and HDMI2.0 when scrambling
> capability of sink
> > +              * be indicated in the HF-VSDB LTE_340Mcsc_scramble
> bit
> > +              */
> > +             buff = SCDC_SCRAMBLING_ENABLE;
> > +             mhdp->hdmi.hdmi_type = MODE_HDMI_2_0;
> > +     }
> > +
> > +     /* TMDS config */
> > +     cdns_hdmi_scdc_write(mhdp, SCDC_TMDS_CONFIG, buff);
> > +}
> > +
> > +static int cdns_hdmi_bridge_attach(struct drm_bridge *bridge,
> > +                                enum drm_bridge_attach_flags
> flags)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp = bridge->driver_private;
> > +
> > +     if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
> > +             dev_err(mhdp->dev, "do not support creating a
> drm_connector\n");
> > +             return -EINVAL;
> > +     }
> > +
> > +     return 0;
> > +}
> > +
> > +static enum drm_mode_status
> > +cdns_hdmi_tmds_char_rate_valid(const struct drm_bridge *bridge,
> > +                            const struct drm_display_mode *mode,
> > +                            unsigned long long tmds_rate)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp = bridge->driver_private;
> > +     union phy_configure_opts phy_cfg;
> > +     int ret;
> > +
> > +     phy_cfg.hdmi.tmds_char_rate = tmds_rate;
> > +
> > +     /* Mailbox protect for HDMI PHY access */
> > +     mutex_lock(&mhdp->mbox_mutex);
> > +     ret = phy_validate(mhdp->phy, PHY_MODE_HDMI, 0, &phy_cfg);
> > +     mutex_unlock(&mhdp->mbox_mutex);
> > +     if (ret < 0)
> > +             return MODE_CLOCK_RANGE;
> > +
> > +     return MODE_OK;
> > +}
> > +
> > +static enum drm_mode_status
> > +cdns_hdmi_bridge_mode_valid(struct drm_bridge *bridge,
> > +                         const struct drm_display_info *info,
> > +                         const struct drm_display_mode *mode)
> > +{
> > +     unsigned long long tmds_rate;
> > +
> > +     /* We don't support double-clocked and Interlaced modes */
> > +     if (mode->flags & DRM_MODE_FLAG_DBLCLK ||
> > +         mode->flags & DRM_MODE_FLAG_INTERLACE)
> > +             return MODE_BAD;
> > +
> > +     /* MAX support pixel clock rate 594MHz */
> > +     if (mode->clock > 594000)
> > +             return MODE_CLOCK_HIGH;
> > +
> > +     if (mode->hdisplay > 3840)
> > +             return MODE_BAD_HVALUE;
> > +
> > +     if (mode->vdisplay > 2160)
> > +             return MODE_BAD_VVALUE;
> > +
> > +     tmds_rate = mode->clock * 1000ULL;
> > +     return cdns_hdmi_tmds_char_rate_valid(bridge, mode, tmds_rate);
> > +}
> > +
> > +static enum drm_connector_status
> > +cdns_hdmi_bridge_detect(struct drm_bridge *bridge)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp = bridge->driver_private;
> > +
> > +     return cdns_mhdp8501_detect(mhdp);
> > +}
> > +
> > +static const struct drm_edid
> > +*cdns_hdmi_bridge_edid_read(struct drm_bridge *bridge,
> > +                         struct drm_connector *connector)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp = bridge->driver_private;
> > +
> > +     return drm_edid_read_custom(connector,
> cdns_hdmi_get_edid_block, mhdp);
> > +}
> > +
> > +static void cdns_hdmi_bridge_atomic_disable(struct drm_bridge *bridge,
> > +                                         struct drm_bridge_state
> *old_state)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp = bridge->driver_private;
> > +
> > +     mhdp->curr_conn = NULL;
> > +
> > +     /* Mailbox protect for HDMI PHY access */
> > +     mutex_lock(&mhdp->mbox_mutex);
> > +     phy_power_off(mhdp->phy);
> > +     mutex_unlock(&mhdp->mbox_mutex);
> > +}
> > +
> > +static void cdns_hdmi_bridge_atomic_enable(struct drm_bridge *bridge,
> > +                                        struct drm_bridge_state
> *old_state)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp = bridge->driver_private;
> > +     struct drm_atomic_state *state = old_state->base.state;
> > +     struct drm_connector *connector;
> > +     struct video_info *video = &mhdp->video_info;
> > +     struct drm_crtc_state *crtc_state;
> > +     struct drm_connector_state *conn_state;
> > +     struct drm_display_mode *mode = &mhdp->mode;
> > +     union phy_configure_opts phy_cfg;
> > +     int ret;
> > +
> > +     connector = drm_atomic_get_new_connector_for_encoder(state,
> > +
> bridge->encoder);
> > +     if (WARN_ON(!connector))
> > +             return;
> > +
> > +     mhdp->curr_conn = connector;
> > +
> > +     conn_state = drm_atomic_get_new_connector_state(state,
> connector);
> > +     if (WARN_ON(!conn_state))
> > +             return;
> > +
> > +     crtc_state = drm_atomic_get_new_crtc_state(state,
> conn_state->crtc);
> > +     if (WARN_ON(!crtc_state))
> > +             return;
> > +
> > +     video->color_fmt = conn_state->hdmi.output_format;
> > +     video->bpc = conn_state->hdmi.output_bpc;
> > +
> > +     drm_mode_copy(&mhdp->mode, &crtc_state->adjusted_mode);
> > +
> > +     /* video mode check */
> > +     if (mode->clock == 0 || mode->hdisplay == 0 || mode->vdisplay ==
> 0)
> > +             return;
> > +
> > +     dev_dbg(mhdp->dev, "Mode: %dx%dp%d\n",
> > +             mode->hdisplay, mode->vdisplay, mode->clock);
> > +
> > +     drm_atomic_helper_connector_hdmi_update_infoframes(connector,
> state);
> > +
> > +     /* Line swapping */
> > +     cdns_mhdp_reg_write(&mhdp->base, LANES_CONFIG, 0x00400000
> | mhdp->lane_mapping);
> > +
> > +     mhdp->hdmi.char_rate = drm_hdmi_compute_mode_clock(mode,
> > +
> mhdp->video_info.bpc,
> > +
> mhdp->video_info.color_fmt);
> > +     phy_cfg.hdmi.tmds_char_rate = mhdp->hdmi.char_rate;
> > +
> > +     /* Mailbox protect for HDMI PHY access */
> > +     mutex_lock(&mhdp->mbox_mutex);
> > +     ret = phy_configure(mhdp->phy, &phy_cfg);
> > +     mutex_unlock(&mhdp->mbox_mutex);
> > +     if (ret) {
> > +             dev_err(mhdp->dev, "%s: phy_configure() failed: %d\n",
> > +                     __func__, ret);
> > +             return;
> > +     }
> > +
> > +     cdns_hdmi_sink_config(mhdp);
> > +
> > +     ret = cdns_hdmi_ctrl_init(mhdp);
> > +     if (ret < 0) {
> > +             dev_err(mhdp->dev, "%s, ret = %d\n", __func__, ret);
> > +             return;
> > +     }
> > +
> > +     /* Config GCP */
> > +     if (mhdp->video_info.bpc == 8)
> > +             cdns_hdmi_disable_gcp(mhdp);
> > +     else
> > +             cdns_hdmi_enable_gcp(mhdp);
> > +
> > +     ret = cdns_hdmi_mode_config(mhdp, mode, &mhdp->video_info);
> > +     if (ret < 0) {
> > +             dev_err(mhdp->dev, "CDN_API_HDMITX_SetVic_blocking
> ret = %d\n", ret);
> > +             return;
> > +     }
> > +}
> > +
> > +static int cdns_hdmi_bridge_clear_infoframe(struct drm_bridge *bridge,
> > +                                         enum
> hdmi_infoframe_type type)
> > +{
> > +     return 0;
> > +}
> > +
> > +static int cdns_hdmi_bridge_write_infoframe(struct drm_bridge *bridge,
> > +                                         enum
> hdmi_infoframe_type type,
> > +                                         const u8 *buffer, size_t
> len)
> > +{
> > +     struct cdns_mhdp8501_device *mhdp = bridge->driver_private;
> > +
> > +     switch (type) {
> > +     case HDMI_INFOFRAME_TYPE_AVI:
> > +             cdns_hdmi_config_infoframe(mhdp, 0, len, buffer,
> HDMI_INFOFRAME_TYPE_AVI);
> > +             break;
> > +     case HDMI_INFOFRAME_TYPE_SPD:
> > +             cdns_hdmi_config_infoframe(mhdp, 1, len, buffer,
> HDMI_INFOFRAME_TYPE_SPD);
> > +             break;
> > +     case HDMI_INFOFRAME_TYPE_VENDOR:
> > +             cdns_hdmi_config_infoframe(mhdp, 2, len, buffer,
> HDMI_INFOFRAME_TYPE_VENDOR);
> > +             break;
> > +     default:
> > +             dev_dbg(mhdp->dev, "Unsupported infoframe type %x\n",
> type);
> > +     }
> > +
> > +     return 0;
> > +}
> > +
> > +static int cdns_hdmi_bridge_atomic_check(struct drm_bridge *bridge,
> > +                                      struct drm_bridge_state
> *bridge_state,
> > +                                      struct drm_crtc_state
> *crtc_state,
> > +                                      struct drm_connector_state
> *conn_state)
> > +{
> > +     return
> drm_atomic_helper_connector_hdmi_check(conn_state->connector,
> conn_state->state);
> > +}
> > +
> > +const struct drm_bridge_funcs cdns_hdmi_bridge_funcs = {
> > +     .attach = cdns_hdmi_bridge_attach,
> > +     .detect = cdns_hdmi_bridge_detect,
> > +     .edid_read = cdns_hdmi_bridge_edid_read,
> > +     .mode_valid = cdns_hdmi_bridge_mode_valid,
> > +     .atomic_enable = cdns_hdmi_bridge_atomic_enable,
> > +     .atomic_disable = cdns_hdmi_bridge_atomic_disable,
> > +     .atomic_check = cdns_hdmi_bridge_atomic_check,
> > +     .atomic_duplicate_state =
> drm_atomic_helper_bridge_duplicate_state,
> > +     .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
> > +     .atomic_reset = drm_atomic_helper_bridge_reset,
> > +     .hdmi_clear_infoframe = cdns_hdmi_bridge_clear_infoframe,
> > +     .hdmi_write_infoframe = cdns_hdmi_bridge_write_infoframe,
> > +     .hdmi_tmds_char_rate_valid = cdns_hdmi_tmds_char_rate_valid,
> > +};




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