// SPDX-License-Identifier: GPL-2.0-only
/*
 * HDMI interface DSS driver for TI's OMAP4 family of SoCs.
 *
 * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com/
 * Authors: Yong Zhi
 *      Mythri pk <mythripk@ti.com>
 */

#define DSS_SUBSYS_NAME "HDMI"

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/clk.h>
#include <linux/regulator/consumer.h>
#include <linux/component.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <sound/omap-hdmi-audio.h>
#include <media/cec.h>

#include <drm/drm_atomic.h>
#include <drm/drm_atomic_state_helper.h>
#include <drm/drm_edid.h>

#include "omapdss.h"
#include "hdmi4_core.h"
#include "hdmi4_cec.h"
#include "dss.h"
#include "hdmi.h"

static int hdmi_runtime_get(struct omap_hdmi *hdmi)
{
        int r;

        DSSDBG("hdmi_runtime_get\n");

        r = pm_runtime_get_sync(&hdmi->pdev->dev);
        if (WARN_ON(r < 0)) {
                pm_runtime_put_noidle(&hdmi->pdev->dev);
                return r;
        }
        return 0;
}

static void hdmi_runtime_put(struct omap_hdmi *hdmi)
{
        int r;

        DSSDBG("hdmi_runtime_put\n");

        r = pm_runtime_put_sync(&hdmi->pdev->dev);
        WARN_ON(r < 0 && r != -ENOSYS);
}

static irqreturn_t hdmi_irq_handler(int irq, void *data)
{
        struct omap_hdmi *hdmi = data;
        struct hdmi_wp_data *wp = &hdmi->wp;
        u32 irqstatus;

        irqstatus = hdmi_wp_get_irqstatus(wp);
        hdmi_wp_set_irqstatus(wp, irqstatus);

        if ((irqstatus & HDMI_IRQ_LINK_CONNECT) &&
                        irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
                /*
                 * If we get both connect and disconnect interrupts at the same
                 * time, turn off the PHY, clear interrupts, and restart, which
                 * raises connect interrupt if a cable is connected, or nothing
                 * if cable is not connected.
                 */
                hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF);

                hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT |
                                HDMI_IRQ_LINK_DISCONNECT);

                hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
        } else if (irqstatus & HDMI_IRQ_LINK_CONNECT) {
                hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_TXON);
        } else if (irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
                hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
        }
        if (irqstatus & HDMI_IRQ_CORE) {
                u32 intr4 = hdmi_read_reg(hdmi->core.base, HDMI_CORE_SYS_INTR4);

                hdmi_write_reg(hdmi->core.base, HDMI_CORE_SYS_INTR4, intr4);
                if (intr4 & 8)
                        hdmi4_cec_irq(&hdmi->core);
        }

        return IRQ_HANDLED;
}

static int hdmi_power_on_core(struct omap_hdmi *hdmi)
{
        int r;

        if (hdmi->core.core_pwr_cnt++)
                return 0;

        r = regulator_enable(hdmi->vdda_reg);
        if (r)
                goto err_reg_enable;

        r = hdmi_runtime_get(hdmi);
        if (r)
                goto err_runtime_get;

        hdmi4_core_powerdown_disable(&hdmi->core);

        /* Make selection of HDMI in DSS */
        dss_select_hdmi_venc_clk_source(hdmi->dss, DSS_HDMI_M_PCLK);

        hdmi->core_enabled = true;

        return 0;

err_runtime_get:
        regulator_disable(hdmi->vdda_reg);
err_reg_enable:
        hdmi->core.core_pwr_cnt--;

        return r;
}

static void hdmi_power_off_core(struct omap_hdmi *hdmi)
{
        if (--hdmi->core.core_pwr_cnt)
                return;

        hdmi->core_enabled = false;

        hdmi_runtime_put(hdmi);
        regulator_disable(hdmi->vdda_reg);
}

static int hdmi_power_on_full(struct omap_hdmi *hdmi)
{
        int r;
        const struct videomode *vm;
        struct hdmi_wp_data *wp = &hdmi->wp;
        struct dss_pll_clock_info hdmi_cinfo = { 0 };
        unsigned int pc;

        r = hdmi_power_on_core(hdmi);
        if (r)
                return r;

        /* disable and clear irqs */
        hdmi_wp_clear_irqenable(wp, ~HDMI_IRQ_CORE);
        hdmi_wp_set_irqstatus(wp, ~HDMI_IRQ_CORE);

        vm = &hdmi->cfg.vm;

        DSSDBG("hdmi_power_on hactive= %d vactive = %d\n", vm->hactive,
               vm->vactive);

        pc = vm->pixelclock;
        if (vm->flags & DISPLAY_FLAGS_DOUBLECLK)
                pc *= 2;

        /* DSS_HDMI_TCLK is bitclk / 10 */
        pc *= 10;

        dss_pll_calc_b(&hdmi->pll.pll, clk_get_rate(hdmi->pll.pll.clkin),
                pc, &hdmi_cinfo);

        r = dss_pll_enable(&hdmi->pll.pll);
        if (r) {
                DSSERR("Failed to enable PLL\n");
                goto err_pll_enable;
        }

        r = dss_pll_set_config(&hdmi->pll.pll, &hdmi_cinfo);
        if (r) {
                DSSERR("Failed to configure PLL\n");
                goto err_pll_cfg;
        }

        r = hdmi_phy_configure(&hdmi->phy, hdmi_cinfo.clkdco,
                hdmi_cinfo.clkout[0]);
        if (r) {
                DSSDBG("Failed to configure PHY\n");
                goto err_phy_cfg;
        }

        r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
        if (r)
                goto err_phy_pwr;

        hdmi4_configure(&hdmi->core, &hdmi->wp, &hdmi->cfg);

        r = dss_mgr_enable(&hdmi->output);
        if (r)
                goto err_mgr_enable;

        r = hdmi_wp_video_start(&hdmi->wp);
        if (r)
                goto err_vid_enable;

        hdmi_wp_set_irqenable(wp,
                HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);

        return 0;

err_vid_enable:
        dss_mgr_disable(&hdmi->output);
err_mgr_enable:
        hdmi_wp_set_phy_pwr(&hdmi->wp, HDMI_PHYPWRCMD_OFF);
err_phy_pwr:
err_phy_cfg:
err_pll_cfg:
        dss_pll_disable(&hdmi->pll.pll);
err_pll_enable:
        hdmi_power_off_core(hdmi);
        return -EIO;
}

static void hdmi_power_off_full(struct omap_hdmi *hdmi)
{
        hdmi_wp_clear_irqenable(&hdmi->wp, ~HDMI_IRQ_CORE);

        hdmi_wp_video_stop(&hdmi->wp);

        dss_mgr_disable(&hdmi->output);

        hdmi_wp_set_phy_pwr(&hdmi->wp, HDMI_PHYPWRCMD_OFF);

        dss_pll_disable(&hdmi->pll.pll);

        hdmi_power_off_core(hdmi);
}

static int hdmi_dump_regs(struct seq_file *s, void *p)
{
        struct omap_hdmi *hdmi = s->private;

        mutex_lock(&hdmi->lock);

        if (hdmi_runtime_get(hdmi)) {
                mutex_unlock(&hdmi->lock);
                return 0;
        }

        hdmi_wp_dump(&hdmi->wp, s);
        hdmi_pll_dump(&hdmi->pll, s);
        hdmi_phy_dump(&hdmi->phy, s);
        hdmi4_core_dump(&hdmi->core, s);

        hdmi_runtime_put(hdmi);
        mutex_unlock(&hdmi->lock);
        return 0;
}

static void hdmi_start_audio_stream(struct omap_hdmi *hd)
{
        hdmi_wp_audio_enable(&hd->wp, true);
        hdmi4_audio_start(&hd->core, &hd->wp);
}

static void hdmi_stop_audio_stream(struct omap_hdmi *hd)
{
        hdmi4_audio_stop(&hd->core, &hd->wp);
        hdmi_wp_audio_enable(&hd->wp, false);
}

int hdmi4_core_enable(struct hdmi_core_data *core)
{
        struct omap_hdmi *hdmi = container_of(core, struct omap_hdmi, core);
        int r = 0;

        DSSDBG("ENTER omapdss_hdmi4_core_enable\n");

        mutex_lock(&hdmi->lock);

        r = hdmi_power_on_core(hdmi);
        if (r) {
                DSSERR("failed to power on device\n");
                goto err0;
        }

        mutex_unlock(&hdmi->lock);
        return 0;

err0:
        mutex_unlock(&hdmi->lock);
        return r;
}

void hdmi4_core_disable(struct hdmi_core_data *core)
{
        struct omap_hdmi *hdmi = container_of(core, struct omap_hdmi, core);

        DSSDBG("Enter omapdss_hdmi4_core_disable\n");

        mutex_lock(&hdmi->lock);

        hdmi_power_off_core(hdmi);

        mutex_unlock(&hdmi->lock);
}

/* -----------------------------------------------------------------------------
 * DRM Bridge Operations
 */

static int hdmi4_bridge_attach(struct drm_bridge *bridge,
                               struct drm_encoder *encoder,
                               enum drm_bridge_attach_flags flags)
{
        struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge);

        if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
                return -EINVAL;

        return drm_bridge_attach(encoder, hdmi->output.next_bridge,
                                 bridge, flags);
}

static void hdmi4_bridge_mode_set(struct drm_bridge *bridge,
                                  const struct drm_display_mode *mode,
                                  const struct drm_display_mode *adjusted_mode)
{
        struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge);

        mutex_lock(&hdmi->lock);

        drm_display_mode_to_videomode(adjusted_mode, &hdmi->cfg.vm);

        dispc_set_tv_pclk(hdmi->dss->dispc, adjusted_mode->clock * 1000);

        mutex_unlock(&hdmi->lock);
}

static void hdmi4_bridge_enable(struct drm_bridge *bridge,
                                struct drm_atomic_state *state)
{
        struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge);
        struct drm_connector_state *conn_state;
        struct drm_connector *connector;
        struct drm_crtc_state *crtc_state;
        unsigned long flags;
        int ret;

        /*
         * None of these should fail, as the bridge can't be enabled without a
         * valid CRTC to connector path with fully populated new states.
         */
        connector = drm_atomic_get_new_connector_for_encoder(state,
                                                             bridge->encoder);
        if (WARN_ON(!connector))
                return;
        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;

        hdmi->cfg.hdmi_dvi_mode = connector->display_info.is_hdmi
                                ? HDMI_HDMI : HDMI_DVI;

        if (connector->display_info.is_hdmi) {
                const struct drm_display_mode *mode;
                struct hdmi_avi_infoframe avi;

                mode = &crtc_state->adjusted_mode;
                ret = drm_hdmi_avi_infoframe_from_display_mode(&avi, connector,
                                                               mode);
                if (ret == 0)
                        hdmi->cfg.infoframe = avi;
        }

        mutex_lock(&hdmi->lock);

        ret = hdmi_power_on_full(hdmi);
        if (ret) {
                DSSERR("failed to power on device\n");
                goto done;
        }

        if (hdmi->audio_configured) {
                ret = hdmi4_audio_config(&hdmi->core, &hdmi->wp,
                                         &hdmi->audio_config,
                                         hdmi->cfg.vm.pixelclock);
                if (ret) {
                        DSSERR("Error restoring audio configuration: %d", ret);
                        hdmi->audio_abort_cb(&hdmi->pdev->dev);
                        hdmi->audio_configured = false;
                }
        }

        spin_lock_irqsave(&hdmi->audio_playing_lock, flags);
        if (hdmi->audio_configured && hdmi->audio_playing)
                hdmi_start_audio_stream(hdmi);
        hdmi->display_enabled = true;
        spin_unlock_irqrestore(&hdmi->audio_playing_lock, flags);

done:
        mutex_unlock(&hdmi->lock);
}

static void hdmi4_bridge_disable(struct drm_bridge *bridge,
                                 struct drm_atomic_state *state)
{
        struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge);
        unsigned long flags;

        mutex_lock(&hdmi->lock);

        spin_lock_irqsave(&hdmi->audio_playing_lock, flags);
        hdmi_stop_audio_stream(hdmi);
        hdmi->display_enabled = false;
        spin_unlock_irqrestore(&hdmi->audio_playing_lock, flags);

        hdmi_power_off_full(hdmi);

        mutex_unlock(&hdmi->lock);
}

static void hdmi4_bridge_hpd_notify(struct drm_bridge *bridge,
                                    struct drm_connector *connector,
                                    enum drm_connector_status status)
{
        struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge);

        if (status == connector_status_disconnected)
                hdmi4_cec_set_phys_addr(&hdmi->core, CEC_PHYS_ADDR_INVALID);
}

static const struct drm_edid *hdmi4_bridge_edid_read(struct drm_bridge *bridge,
                                                     struct drm_connector *connector)
{
        struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge);
        const struct drm_edid *drm_edid = NULL;
        unsigned int cec_addr;
        bool need_enable;
        int r;

        need_enable = hdmi->core_enabled == false;

        if (need_enable) {
                r = hdmi4_core_enable(&hdmi->core);
                if (r)
                        return NULL;
        }

        mutex_lock(&hdmi->lock);
        r = hdmi_runtime_get(hdmi);
        BUG_ON(r);

        r = hdmi4_core_ddc_init(&hdmi->core);
        if (r)
                goto done;

        drm_edid = drm_edid_read_custom(connector, hdmi4_core_ddc_read, &hdmi->core);

done:
        hdmi_runtime_put(hdmi);
        mutex_unlock(&hdmi->lock);

        if (drm_edid) {
                /*
                 * FIXME: The CEC physical address should be set using
                 * hdmi4_cec_set_phys_addr(&hdmi->core,
                 * connector->display_info.source_physical_address) from a path
                 * that has read the EDID and called
                 * drm_edid_connector_update().
                 */
                const struct edid *edid = drm_edid_raw(drm_edid);
                unsigned int len = (edid->extensions + 1) * EDID_LENGTH;

                cec_addr = cec_get_edid_phys_addr((u8 *)edid, len, NULL);
        } else {
                cec_addr = CEC_PHYS_ADDR_INVALID;
        }

        hdmi4_cec_set_phys_addr(&hdmi->core, cec_addr);

        if (need_enable)
                hdmi4_core_disable(&hdmi->core);

        return drm_edid;
}

static const struct drm_bridge_funcs hdmi4_bridge_funcs = {
        .attach = hdmi4_bridge_attach,
        .mode_set = hdmi4_bridge_mode_set,
        .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,
        .atomic_enable = hdmi4_bridge_enable,
        .atomic_disable = hdmi4_bridge_disable,
        .hpd_notify = hdmi4_bridge_hpd_notify,
        .edid_read = hdmi4_bridge_edid_read,
};

static void hdmi4_bridge_init(struct omap_hdmi *hdmi)
{
        hdmi->bridge.of_node = hdmi->pdev->dev.of_node;
        hdmi->bridge.ops = DRM_BRIDGE_OP_EDID;
        hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA;

        drm_bridge_add(&hdmi->bridge);
}

static void hdmi4_bridge_cleanup(struct omap_hdmi *hdmi)
{
        drm_bridge_remove(&hdmi->bridge);
}

/* -----------------------------------------------------------------------------
 * Audio Callbacks
 */

static int hdmi_audio_startup(struct device *dev,
                              void (*abort_cb)(struct device *dev))
{
        struct omap_hdmi *hd = dev_get_drvdata(dev);

        mutex_lock(&hd->lock);

        WARN_ON(hd->audio_abort_cb != NULL);

        hd->audio_abort_cb = abort_cb;

        mutex_unlock(&hd->lock);

        return 0;
}

static int hdmi_audio_shutdown(struct device *dev)
{
        struct omap_hdmi *hd = dev_get_drvdata(dev);

        mutex_lock(&hd->lock);
        hd->audio_abort_cb = NULL;
        hd->audio_configured = false;
        hd->audio_playing = false;
        mutex_unlock(&hd->lock);

        return 0;
}

static int hdmi_audio_start(struct device *dev)
{
        struct omap_hdmi *hd = dev_get_drvdata(dev);
        unsigned long flags;

        spin_lock_irqsave(&hd->audio_playing_lock, flags);

        if (hd->display_enabled) {
                if (!hdmi_mode_has_audio(&hd->cfg))
                        DSSERR("%s: Video mode does not support audio\n",
                               __func__);
                hdmi_start_audio_stream(hd);
        }
        hd->audio_playing = true;

        spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
        return 0;
}

static void hdmi_audio_stop(struct device *dev)
{
        struct omap_hdmi *hd = dev_get_drvdata(dev);
        unsigned long flags;

        WARN_ON(!hdmi_mode_has_audio(&hd->cfg));

        spin_lock_irqsave(&hd->audio_playing_lock, flags);

        if (hd->display_enabled)
                hdmi_stop_audio_stream(hd);
        hd->audio_playing = false;

        spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
}

static int hdmi_audio_config(struct device *dev,
                             struct omap_dss_audio *dss_audio)
{
        struct omap_hdmi *hd = dev_get_drvdata(dev);
        int ret = 0;

        mutex_lock(&hd->lock);

        if (hd->display_enabled) {
                ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
                                         hd->cfg.vm.pixelclock);
                if (ret)
                        goto out;
        }

        hd->audio_configured = true;
        hd->audio_config = *dss_audio;
out:
        mutex_unlock(&hd->lock);

        return ret;
}

static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
        .audio_startup = hdmi_audio_startup,
        .audio_shutdown = hdmi_audio_shutdown,
        .audio_start = hdmi_audio_start,
        .audio_stop = hdmi_audio_stop,
        .audio_config = hdmi_audio_config,
};

static int hdmi_audio_register(struct omap_hdmi *hdmi)
{
        struct omap_hdmi_audio_pdata pdata = {
                .dev = &hdmi->pdev->dev,
                .version = 4,
                .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi->wp),
                .ops = &hdmi_audio_ops,
        };

        hdmi->audio_pdev = platform_device_register_data(
                &hdmi->pdev->dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
                &pdata, sizeof(pdata));

        if (IS_ERR(hdmi->audio_pdev))
                return PTR_ERR(hdmi->audio_pdev);

        return 0;
}

/* -----------------------------------------------------------------------------
 * Component Bind & Unbind
 */

static int hdmi4_bind(struct device *dev, struct device *master, void *data)
{
        struct dss_device *dss = dss_get_device(master);
        struct omap_hdmi *hdmi = dev_get_drvdata(dev);
        int r;

        hdmi->dss = dss;

        r = hdmi_runtime_get(hdmi);
        if (r)
                return r;

        r = hdmi_pll_init(dss, hdmi->pdev, &hdmi->pll, &hdmi->wp);
        if (r)
                goto err_runtime_put;

        r = hdmi4_cec_init(hdmi->pdev, &hdmi->core, &hdmi->wp);
        if (r)
                goto err_pll_uninit;

        r = hdmi_audio_register(hdmi);
        if (r) {
                DSSERR("Registering HDMI audio failed\n");
                goto err_cec_uninit;
        }

        hdmi->debugfs = dss_debugfs_create_file(dss, "hdmi", hdmi_dump_regs,
                                               hdmi);

        hdmi_runtime_put(hdmi);

        return 0;

err_cec_uninit:
        hdmi4_cec_uninit(&hdmi->core);
err_pll_uninit:
        hdmi_pll_uninit(&hdmi->pll);
err_runtime_put:
        hdmi_runtime_put(hdmi);
        return r;
}

static void hdmi4_unbind(struct device *dev, struct device *master, void *data)
{
        struct omap_hdmi *hdmi = dev_get_drvdata(dev);

        dss_debugfs_remove_file(hdmi->debugfs);

        if (hdmi->audio_pdev)
                platform_device_unregister(hdmi->audio_pdev);

        hdmi4_cec_uninit(&hdmi->core);
        hdmi_pll_uninit(&hdmi->pll);
}

static const struct component_ops hdmi4_component_ops = {
        .bind   = hdmi4_bind,
        .unbind = hdmi4_unbind,
};

/* -----------------------------------------------------------------------------
 * Probe & Remove, Suspend & Resume
 */

static int hdmi4_init_output(struct omap_hdmi *hdmi)
{
        struct omap_dss_device *out = &hdmi->output;
        int r;

        hdmi4_bridge_init(hdmi);

        out->dev = &hdmi->pdev->dev;
        out->id = OMAP_DSS_OUTPUT_HDMI;
        out->type = OMAP_DISPLAY_TYPE_HDMI;
        out->name = "hdmi.0";
        out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
        out->of_port = 0;

        r = omapdss_device_init_output(out, &hdmi->bridge);
        if (r < 0) {
                hdmi4_bridge_cleanup(hdmi);
                return r;
        }

        omapdss_device_register(out);

        return 0;
}

static void hdmi4_uninit_output(struct omap_hdmi *hdmi)
{
        struct omap_dss_device *out = &hdmi->output;

        omapdss_device_unregister(out);
        omapdss_device_cleanup_output(out);

        hdmi4_bridge_cleanup(hdmi);
}

static int hdmi4_probe_of(struct omap_hdmi *hdmi)
{
        struct platform_device *pdev = hdmi->pdev;
        struct device_node *node = pdev->dev.of_node;
        struct device_node *ep;
        int r;

        ep = of_graph_get_endpoint_by_regs(node, 0, 0);
        if (!ep)
                return 0;

        r = hdmi_parse_lanes_of(pdev, ep, &hdmi->phy);
        of_node_put(ep);
        return r;
}

static int hdmi4_probe(struct platform_device *pdev)
{
        struct omap_hdmi *hdmi;
        int irq;
        int r;

        hdmi = devm_drm_bridge_alloc(&pdev->dev, struct omap_hdmi, bridge, &hdmi4_bridge_funcs);
        if (IS_ERR(hdmi))
                return PTR_ERR(hdmi);

        hdmi->pdev = pdev;

        dev_set_drvdata(&pdev->dev, hdmi);

        mutex_init(&hdmi->lock);
        spin_lock_init(&hdmi->audio_playing_lock);

        r = hdmi4_probe_of(hdmi);
        if (r)
                return r;

        r = hdmi_wp_init(pdev, &hdmi->wp, 4);
        if (r)
                return r;

        r = hdmi_phy_init(pdev, &hdmi->phy, 4);
        if (r)
                return r;

        r = hdmi4_core_init(pdev, &hdmi->core);
        if (r)
                return r;

        irq = platform_get_irq(pdev, 0);
        if (irq < 0) {
                DSSERR("platform_get_irq failed\n");
                return -ENODEV;
        }

        r = devm_request_threaded_irq(&pdev->dev, irq,
                        NULL, hdmi_irq_handler,
                        IRQF_ONESHOT, "OMAP HDMI", hdmi);
        if (r) {
                DSSERR("HDMI IRQ request failed\n");
                return r;
        }

        hdmi->vdda_reg = devm_regulator_get(&pdev->dev, "vdda");
        if (IS_ERR(hdmi->vdda_reg)) {
                r = PTR_ERR(hdmi->vdda_reg);
                if (r != -EPROBE_DEFER)
                        DSSERR("can't get VDDA regulator\n");
                return r;
        }

        pm_runtime_enable(&pdev->dev);

        r = hdmi4_init_output(hdmi);
        if (r)
                goto err_pm_disable;

        r = component_add(&pdev->dev, &hdmi4_component_ops);
        if (r)
                goto err_uninit_output;

        return 0;

err_uninit_output:
        hdmi4_uninit_output(hdmi);
err_pm_disable:
        pm_runtime_disable(&pdev->dev);
        return r;
}

static void hdmi4_remove(struct platform_device *pdev)
{
        struct omap_hdmi *hdmi = platform_get_drvdata(pdev);

        component_del(&pdev->dev, &hdmi4_component_ops);

        hdmi4_uninit_output(hdmi);

        pm_runtime_disable(&pdev->dev);
}

static const struct of_device_id hdmi_of_match[] = {
        { .compatible = "ti,omap4-hdmi", },
        {},
};

struct platform_driver omapdss_hdmi4hw_driver = {
        .probe          = hdmi4_probe,
        .remove         = hdmi4_remove,
        .driver         = {
                .name   = "omapdss_hdmi",
                .of_match_table = hdmi_of_match,
                .suppress_bind_attrs = true,
        },
};