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

        if (!out->panel)
                out->bridge = of_drm_find_and_get_bridge(remote_node);

        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 = drm_bridge_get(bridge);
        }

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

                out->next_bridge = out->bridge;
                out->bridge = drm_bridge_get(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);

        drm_bridge_put(out->next_bridge);
        drm_bridge_put(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);
}