Release 4.11 drivers/gpu/drm/mxsfb/mxsfb_out.c
/*
* Copyright (C) 2016 Marek Vasut <marex@denx.de>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* 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.
*/
#include <linux/of_graph.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_panel.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_simple_kms_helper.h>
#include <drm/drmP.h>
#include "mxsfb_drv.h"
static struct mxsfb_drm_private *
drm_connector_to_mxsfb_drm_private(struct drm_connector *connector)
{
return container_of(connector, struct mxsfb_drm_private, connector);
}
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static int mxsfb_panel_get_modes(struct drm_connector *connector)
{
struct mxsfb_drm_private *mxsfb =
drm_connector_to_mxsfb_drm_private(connector);
if (mxsfb->panel)
return mxsfb->panel->funcs->get_modes(mxsfb->panel);
return 0;
}
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static const struct
drm_connector_helper_funcs mxsfb_panel_connector_helper_funcs = {
.get_modes = mxsfb_panel_get_modes,
};
static enum drm_connector_status
mxsfb_panel_connector_detect(struct drm_connector *connector, bool force)
{
struct mxsfb_drm_private *mxsfb =
drm_connector_to_mxsfb_drm_private(connector);
if (mxsfb->panel)
return connector_status_connected;
return connector_status_disconnected;
}
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static void mxsfb_panel_connector_destroy(struct drm_connector *connector)
{
struct mxsfb_drm_private *mxsfb =
drm_connector_to_mxsfb_drm_private(connector);
if (mxsfb->panel)
drm_panel_detach(mxsfb->panel);
drm_connector_unregister(connector);
drm_connector_cleanup(connector);
}
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static const struct drm_connector_funcs mxsfb_panel_connector_funcs = {
.dpms = drm_atomic_helper_connector_dpms,
.detect = mxsfb_panel_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = mxsfb_panel_connector_destroy,
.reset = drm_atomic_helper_connector_reset,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static int mxsfb_attach_endpoint(struct drm_device *drm,
const struct of_endpoint *ep)
{
struct mxsfb_drm_private *mxsfb = drm->dev_private;
struct device_node *np;
struct drm_panel *panel;
int ret = -EPROBE_DEFER;
np = of_graph_get_remote_port_parent(ep->local_node);
panel = of_drm_find_panel(np);
of_node_put(np);
if (!panel)
return -EPROBE_DEFER;
mxsfb->connector.dpms = DRM_MODE_DPMS_OFF;
mxsfb->connector.polled = 0;
drm_connector_helper_add(&mxsfb->connector,
&mxsfb_panel_connector_helper_funcs);
ret = drm_connector_init(drm, &mxsfb->connector,
&mxsfb_panel_connector_funcs,
DRM_MODE_CONNECTOR_Unknown);
if (!ret)
mxsfb->panel = panel;
return ret;
}
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int mxsfb_create_output(struct drm_device *drm)
{
struct mxsfb_drm_private *mxsfb = drm->dev_private;
struct device_node *ep_np = NULL;
struct of_endpoint ep;
int ret;
for_each_endpoint_of_node(drm->dev->of_node, ep_np) {
ret = of_graph_parse_endpoint(ep_np, &ep);
if (!ret)
ret = mxsfb_attach_endpoint(drm, &ep);
if (ret) {
of_node_put(ep_np);
return ret;
}
}
if (!mxsfb->panel)
return -EPROBE_DEFER;
return 0;
}
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