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}