Quelle  output.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com/
 * Author: Archit Taneja <archit@ti.com>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_graph.h>

#include <drm/drm_bridge.h>
#include <drm/drm_panel.h>

#include "dss.h"
#include "omapdss.h"

int omapdss_device_init_output(struct omap_dss_device *out,
          struct drm_bridge *local_bridge)
{
 struct device_node *remote_node;
 int ret;

 remote_node = of_graph_get_remote_node(out->dev->of_node,
            out->of_port, 0);
 if (!remote_node) {
  dev_dbg(out->dev, "failed to find video sink\n");
  return 0;
 }

 out->bridge = of_drm_find_bridge(remote_node);
 out->panel = of_drm_find_panel(remote_node);
 if (IS_ERR(out->panel))
  out->panel = NULL;

 of_node_put(remote_node);

 if (out->panel) {
  struct drm_bridge *bridge;

  bridge = drm_panel_bridge_add(out->panel);
  if (IS_ERR(bridge)) {
   dev_err(out->dev,
    "unable to create panel bridge (%ld)\n",
    PTR_ERR(bridge));
   ret = PTR_ERR(bridge);
   goto error;
  }

  out->bridge = bridge;
 }

 if (local_bridge) {
  if (!out->bridge) {
   ret = -EPROBE_DEFER;
   goto error;
  }

  out->next_bridge = out->bridge;
  out->bridge = local_bridge;
 }

 if (!out->bridge) {
  ret = -EPROBE_DEFER;
  goto error;
 }

 return 0;

error:
 omapdss_device_cleanup_output(out);
 return ret;
}

void omapdss_device_cleanup_output(struct omap_dss_device *out)
{
 if (out->bridge && out->panel)
  drm_panel_bridge_remove(out->next_bridge ?
     out->next_bridge : out->bridge);
}

void dss_mgr_set_timings(struct omap_dss_device *dssdev,
    const struct videomode *vm)
{
 omap_crtc_dss_set_timings(dssdev->dss->mgr_ops_priv,
       dssdev->dispc_channel, vm);
}

void dss_mgr_set_lcd_config(struct omap_dss_device *dssdev,
  const struct dss_lcd_mgr_config *config)
{
 omap_crtc_dss_set_lcd_config(dssdev->dss->mgr_ops_priv,
          dssdev->dispc_channel, config);
}

int dss_mgr_enable(struct omap_dss_device *dssdev)
{
 return omap_crtc_dss_enable(dssdev->dss->mgr_ops_priv,
         dssdev->dispc_channel);
}

void dss_mgr_disable(struct omap_dss_device *dssdev)
{
 omap_crtc_dss_disable(dssdev->dss->mgr_ops_priv,
          dssdev->dispc_channel);
}

void dss_mgr_start_update(struct omap_dss_device *dssdev)
{
 omap_crtc_dss_start_update(dssdev->dss->mgr_ops_priv,
        dssdev->dispc_channel);
}

int dss_mgr_register_framedone_handler(struct omap_dss_device *dssdev,
  void (*handler)(void *), void *data)
{
 struct dss_device *dss = dssdev->dss;

 return omap_crtc_dss_register_framedone(dss->mgr_ops_priv,
       dssdev->dispc_channel,
       handler, data);
}

void dss_mgr_unregister_framedone_handler(struct omap_dss_device *dssdev,
  void (*handler)(void *), void *data)
{
 struct dss_device *dss = dssdev->dss;

 omap_crtc_dss_unregister_framedone(dss->mgr_ops_priv,
         dssdev->dispc_channel,
         handler, data);
}