// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2015 Texas Instruments
 * Author: Jyri Sarha <jsarha@ti.com>
 */

#include <linux/of_graph.h>

#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_bridge_connector.h>
#include <drm/drm_of.h>
#include <drm/drm_simple_kms_helper.h>

#include "tilcdc_drv.h"
#include "tilcdc_encoder.h"

static
int tilcdc_attach_bridge(struct drm_device *ddev, struct drm_bridge *bridge)
{
        struct tilcdc_drm_private *priv = ddev_to_tilcdc_priv(ddev);
        struct drm_connector *connector;
        int ret;

        priv->encoder->base.possible_crtcs = BIT(0);

        ret = drm_bridge_attach(&priv->encoder->base, bridge, NULL,
                                DRM_BRIDGE_ATTACH_NO_CONNECTOR);
        if (ret)
                return ret;

        connector = drm_bridge_connector_init(ddev, &priv->encoder->base);
        if (IS_ERR(connector)) {
                drm_err(ddev, "bridge_connector create failed\n");
                return PTR_ERR(connector);
        }

        priv->connector = connector;
        return 0;
}

int tilcdc_encoder_create(struct drm_device *ddev)
{
        struct tilcdc_drm_private *priv = ddev_to_tilcdc_priv(ddev);
        struct tilcdc_encoder *encoder;
        struct drm_bridge *bridge;

        bridge = devm_drm_of_get_bridge(ddev->dev, ddev->dev->of_node, 0, 0);
        if (PTR_ERR(bridge) == -ENODEV)
                return 0;
        else if (IS_ERR(bridge))
                return PTR_ERR(bridge);

        encoder = drmm_simple_encoder_alloc(ddev, struct tilcdc_encoder,
                                            base, DRM_MODE_ENCODER_NONE);
        if (IS_ERR(encoder)) {
                drm_err(ddev, "drm_encoder_init() failed %pe\n", encoder);
                return PTR_ERR(encoder);
        }
        priv->encoder = encoder;

        return tilcdc_attach_bridge(ddev, bridge);
}