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// 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_of.h>
#include <drm/drm_simple_kms_helper.h>
#include "tilcdc_drv.h"
#include "tilcdc_encoder.h"
static
struct drm_connector *tilcdc_encoder_find_connector(struct drm_device *ddev,
struct drm_encoder *encoder)
{
struct drm_connector *connector;
list_for_each_entry(connector, &ddev->mode_config.connector_list, head) {
if (drm_connector_has_possible_encoder(connector, encoder))
return connector;
}
dev_err(ddev->dev, "No connector found for %s encoder (id %d)\n",
encoder->name, encoder->base.id);
return NULL;
}
static
int tilcdc_attach_bridge(struct drm_device *ddev, struct drm_bridge *bridge)
{
struct tilcdc_drm_private *priv = ddev_to_tilcdc_priv(ddev);
int ret;
priv->encoder->base.possible_crtcs = BIT(0);
ret = drm_bridge_attach(&priv->encoder->base, bridge, NULL, 0);
if (ret)
return ret;
priv->connector = tilcdc_encoder_find_connector(ddev, &priv->encoder->base);
if (!priv->connector)
return -ENODEV;
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;
struct drm_panel *panel;
int ret;
ret = drm_of_find_panel_or_bridge(ddev->dev->of_node, 0, 0,
&panel, &bridge);
if (ret == -ENODEV)
return 0;
else if (ret)
return ret;
encoder = drmm_simple_encoder_alloc(ddev, struct tilcdc_encoder,
base, DRM_MODE_ENCODER_NONE);
if (IS_ERR(encoder)) {
dev_err(ddev->dev, "drm_encoder_init() failed %pe\n", encoder);
return PTR_ERR(encoder);
}
priv->encoder = encoder;
if (panel) {
bridge = devm_drm_panel_bridge_add_typed(ddev->dev, panel,
DRM_MODE_CONNECTOR_DPI);
if (IS_ERR(bridge))
return PTR_ERR(bridge);
}
return tilcdc_attach_bridge(ddev, bridge);
}
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