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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2016 Marek Vasut <marex@denx.de>
4 */
5
6#include <linux/of_graph.h>
7
8#include <drm/drm_atomic.h>
9#include <drm/drm_atomic_helper.h>
10#include <drm/drm_crtc.h>
11#include <drm/drm_fb_cma_helper.h>
12#include <drm/drm_gem_cma_helper.h>
13#include <drm/drm_of.h>
14#include <drm/drm_panel.h>
15#include <drm/drm_plane_helper.h>
16#include <drm/drm_probe_helper.h>
17#include <drm/drm_simple_kms_helper.h>
18
19#include "mxsfb_drv.h"
20
21static struct mxsfb_drm_private *
22drm_connector_to_mxsfb_drm_private(struct drm_connector *connector)
23{
24 return container_of(connector, struct mxsfb_drm_private, connector);
25}
26
27static int mxsfb_panel_get_modes(struct drm_connector *connector)
28{
29 struct mxsfb_drm_private *mxsfb =
30 drm_connector_to_mxsfb_drm_private(connector);
31
32 if (mxsfb->panel)
33 return drm_panel_get_modes(mxsfb->panel);
34
35 return 0;
36}
37
38static const struct
39drm_connector_helper_funcs mxsfb_panel_connector_helper_funcs = {
40 .get_modes = mxsfb_panel_get_modes,
41};
42
43static enum drm_connector_status
44mxsfb_panel_connector_detect(struct drm_connector *connector, bool force)
45{
46 struct mxsfb_drm_private *mxsfb =
47 drm_connector_to_mxsfb_drm_private(connector);
48
49 if (mxsfb->panel)
50 return connector_status_connected;
51
52 return connector_status_disconnected;
53}
54
55static void mxsfb_panel_connector_destroy(struct drm_connector *connector)
56{
57 struct mxsfb_drm_private *mxsfb =
58 drm_connector_to_mxsfb_drm_private(connector);
59
60 if (mxsfb->panel)
61 drm_panel_detach(mxsfb->panel);
62
63 drm_connector_unregister(connector);
64 drm_connector_cleanup(connector);
65}
66
67static const struct drm_connector_funcs mxsfb_panel_connector_funcs = {
68 .detect = mxsfb_panel_connector_detect,
69 .fill_modes = drm_helper_probe_single_connector_modes,
70 .destroy = mxsfb_panel_connector_destroy,
71 .reset = drm_atomic_helper_connector_reset,
72 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
73 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
74};
75
76int mxsfb_create_output(struct drm_device *drm)
77{
78 struct mxsfb_drm_private *mxsfb = drm->dev_private;
79 struct drm_panel *panel;
80 int ret;
81
82 ret = drm_of_find_panel_or_bridge(drm->dev->of_node, 0, 0, &panel, NULL);
83 if (ret)
84 return ret;
85
86 mxsfb->connector.dpms = DRM_MODE_DPMS_OFF;
87 mxsfb->connector.polled = 0;
88 drm_connector_helper_add(&mxsfb->connector,
89 &mxsfb_panel_connector_helper_funcs);
90 ret = drm_connector_init(drm, &mxsfb->connector,
91 &mxsfb_panel_connector_funcs,
92 DRM_MODE_CONNECTOR_Unknown);
93 if (!ret)
94 mxsfb->panel = panel;
95
96 return ret;
97}
1/*
2 * Copyright (C) 2016 Marek Vasut <marex@denx.de>
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
13
14#include <linux/of_graph.h>
15
16#include <drm/drm_atomic.h>
17#include <drm/drm_atomic_helper.h>
18#include <drm/drm_crtc.h>
19#include <drm/drm_crtc_helper.h>
20#include <drm/drm_fb_cma_helper.h>
21#include <drm/drm_gem_cma_helper.h>
22#include <drm/drm_panel.h>
23#include <drm/drm_plane_helper.h>
24#include <drm/drm_simple_kms_helper.h>
25#include <drm/drmP.h>
26
27#include "mxsfb_drv.h"
28
29static struct mxsfb_drm_private *
30drm_connector_to_mxsfb_drm_private(struct drm_connector *connector)
31{
32 return container_of(connector, struct mxsfb_drm_private, connector);
33}
34
35static int mxsfb_panel_get_modes(struct drm_connector *connector)
36{
37 struct mxsfb_drm_private *mxsfb =
38 drm_connector_to_mxsfb_drm_private(connector);
39
40 if (mxsfb->panel)
41 return mxsfb->panel->funcs->get_modes(mxsfb->panel);
42
43 return 0;
44}
45
46static const struct
47drm_connector_helper_funcs mxsfb_panel_connector_helper_funcs = {
48 .get_modes = mxsfb_panel_get_modes,
49};
50
51static enum drm_connector_status
52mxsfb_panel_connector_detect(struct drm_connector *connector, bool force)
53{
54 struct mxsfb_drm_private *mxsfb =
55 drm_connector_to_mxsfb_drm_private(connector);
56
57 if (mxsfb->panel)
58 return connector_status_connected;
59
60 return connector_status_disconnected;
61}
62
63static void mxsfb_panel_connector_destroy(struct drm_connector *connector)
64{
65 struct mxsfb_drm_private *mxsfb =
66 drm_connector_to_mxsfb_drm_private(connector);
67
68 if (mxsfb->panel)
69 drm_panel_detach(mxsfb->panel);
70
71 drm_connector_unregister(connector);
72 drm_connector_cleanup(connector);
73}
74
75static const struct drm_connector_funcs mxsfb_panel_connector_funcs = {
76 .dpms = drm_atomic_helper_connector_dpms,
77 .detect = mxsfb_panel_connector_detect,
78 .fill_modes = drm_helper_probe_single_connector_modes,
79 .destroy = mxsfb_panel_connector_destroy,
80 .reset = drm_atomic_helper_connector_reset,
81 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
82 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
83};
84
85static int mxsfb_attach_endpoint(struct drm_device *drm,
86 const struct of_endpoint *ep)
87{
88 struct mxsfb_drm_private *mxsfb = drm->dev_private;
89 struct device_node *np;
90 struct drm_panel *panel;
91 int ret = -EPROBE_DEFER;
92
93 np = of_graph_get_remote_port_parent(ep->local_node);
94 panel = of_drm_find_panel(np);
95 of_node_put(np);
96
97 if (!panel)
98 return -EPROBE_DEFER;
99
100 mxsfb->connector.dpms = DRM_MODE_DPMS_OFF;
101 mxsfb->connector.polled = 0;
102 drm_connector_helper_add(&mxsfb->connector,
103 &mxsfb_panel_connector_helper_funcs);
104 ret = drm_connector_init(drm, &mxsfb->connector,
105 &mxsfb_panel_connector_funcs,
106 DRM_MODE_CONNECTOR_Unknown);
107 if (!ret)
108 mxsfb->panel = panel;
109
110 return ret;
111}
112
113int mxsfb_create_output(struct drm_device *drm)
114{
115 struct device_node *ep_np = NULL;
116 struct of_endpoint ep;
117 int ret;
118
119 for_each_endpoint_of_node(drm->dev->of_node, ep_np) {
120 ret = of_graph_parse_endpoint(ep_np, &ep);
121 if (!ret)
122 ret = mxsfb_attach_endpoint(drm, &ep);
123
124 if (ret) {
125 of_node_put(ep_np);
126 return ret;
127 }
128 }
129
130 return 0;
131}