text: // 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 "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,
  			       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(bridge->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_bridge_state *bridge_state)
  {
  	struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge);
  	struct drm_atomic_state *state = bridge_state->base.state;
  	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_bridge_state *bridge_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,
  				    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 struct edid *hdmi4_bridge_get_edid(struct drm_bridge *bridge,
  					  struct drm_connector *connector)
  {
  	struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge);
  	struct edid *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;
  
  	edid = drm_do_get_edid(connector, hdmi4_core_ddc_read, &hdmi->core);
  
  done:
  	hdmi_runtime_put(hdmi);
  	mutex_unlock(&hdmi->lock);
  
  	if (edid && edid->extensions) {
  		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 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,
  	.get_edid = hdmi4_bridge_get_edid,
  };
  
  static void hdmi4_bridge_init(struct omap_hdmi *hdmi)
  {
  	hdmi->bridge.funcs = &hdmi4_bridge_funcs;
  	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 = kzalloc(sizeof(*hdmi), GFP_KERNEL);
  	if (!hdmi)
  		return -ENOMEM;
  
  	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)
  		goto err_free;
  
  	r = hdmi_wp_init(pdev, &hdmi->wp, 4);
  	if (r)
  		goto err_free;
  
  	r = hdmi_phy_init(pdev, &hdmi->phy, 4);
  	if (r)
  		goto err_free;
  
  	r = hdmi4_core_init(pdev, &hdmi->core);
  	if (r)
  		goto err_free;
  
  	irq = platform_get_irq(pdev, 0);
  	if (irq < 0) {
  		DSSERR("platform_get_irq failed\n");
  		r = -ENODEV;
  		goto err_free;
  	}
  
  	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");
  		goto err_free;
  	}
  
  	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");
  		goto err_free;
  	}
  
  	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);
  err_free:
  	kfree(hdmi);
  	return r;
  }
  
  static int 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);
  
  	kfree(hdmi);
  	return 0;
  }
  
  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,
  	},
  };
  