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/*
* Copyright (C) 2014 Traphandler
* Copyright (C) 2014 Free Electrons
* Copyright (C) 2014 Atmel
*
* Author: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
* Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/of_graph.h>
#include <drm/drmP.h>
#include <drm/drm_of.h>
#include <drm/drm_bridge.h>
#include "atmel_hlcdc_dc.h"
static const struct drm_encoder_funcs atmel_hlcdc_panel_encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
static int atmel_hlcdc_attach_endpoint(struct drm_device *dev, int endpoint)
{
struct drm_encoder *encoder;
struct drm_panel *panel;
struct drm_bridge *bridge;
int ret;
ret = drm_of_find_panel_or_bridge(dev->dev->of_node, 0, endpoint,
&panel, &bridge);
if (ret)
return ret;
encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);
if (!encoder)
return -EINVAL;
ret = drm_encoder_init(dev, encoder,
&atmel_hlcdc_panel_encoder_funcs,
DRM_MODE_ENCODER_NONE, NULL);
if (ret)
return ret;
encoder->possible_crtcs = 0x1;
if (panel) {
bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_Unknown);
if (IS_ERR(bridge))
return PTR_ERR(bridge);
}
if (bridge) {
ret = drm_bridge_attach(encoder, bridge, NULL);
if (!ret)
return 0;
if (panel)
drm_panel_bridge_remove(bridge);
}
drm_encoder_cleanup(encoder);
return ret;
}
int atmel_hlcdc_create_outputs(struct drm_device *dev)
{
int endpoint, ret = 0;
for (endpoint = 0; !ret; endpoint++)
ret = atmel_hlcdc_attach_endpoint(dev, endpoint);
/* At least one device was successfully attached.*/
if (ret == -ENODEV && endpoint)
return 0;
return ret;
}
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