91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
/*
|
|
* 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;
|
|
}
|