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
21 static struct mxsfb_drm_private *
drm_connector_to_mxsfb_drm_private(struct drm_connector * connector)22 drm_connector_to_mxsfb_drm_private(struct drm_connector *connector)
23 {
24 return container_of(connector, struct mxsfb_drm_private, connector);
25 }
26
mxsfb_panel_get_modes(struct drm_connector * connector)27 static 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
38 static const struct
39 drm_connector_helper_funcs mxsfb_panel_connector_helper_funcs = {
40 .get_modes = mxsfb_panel_get_modes,
41 };
42
43 static enum drm_connector_status
mxsfb_panel_connector_detect(struct drm_connector * connector,bool force)44 mxsfb_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
mxsfb_panel_connector_destroy(struct drm_connector * connector)55 static 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
67 static 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
mxsfb_create_output(struct drm_device * drm)76 int 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 }
98