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,
25			    panel_connector);
26}
27
28static int mxsfb_panel_get_modes(struct drm_connector *connector)
29{
30	struct mxsfb_drm_private *mxsfb =
31			drm_connector_to_mxsfb_drm_private(connector);
32
33	if (mxsfb->panel)
34		return drm_panel_get_modes(mxsfb->panel, connector);
35
36	return 0;
37}
38
39static const struct
40drm_connector_helper_funcs mxsfb_panel_connector_helper_funcs = {
41	.get_modes = mxsfb_panel_get_modes,
42};
43
44static enum drm_connector_status
45mxsfb_panel_connector_detect(struct drm_connector *connector, bool force)
46{
47	struct mxsfb_drm_private *mxsfb =
48			drm_connector_to_mxsfb_drm_private(connector);
49
50	if (mxsfb->panel)
51		return connector_status_connected;
52
53	return connector_status_disconnected;
54}
55
56static void mxsfb_panel_connector_destroy(struct drm_connector *connector)
57{
58	struct mxsfb_drm_private *mxsfb =
59			drm_connector_to_mxsfb_drm_private(connector);
60
61	if (mxsfb->panel)
62		drm_panel_detach(mxsfb->panel);
63
64	drm_connector_unregister(connector);
65	drm_connector_cleanup(connector);
66}
67
68static const struct drm_connector_funcs mxsfb_panel_connector_funcs = {
69	.detect			= mxsfb_panel_connector_detect,
70	.fill_modes		= drm_helper_probe_single_connector_modes,
71	.destroy		= mxsfb_panel_connector_destroy,
72	.reset			= drm_atomic_helper_connector_reset,
73	.atomic_duplicate_state	= drm_atomic_helper_connector_duplicate_state,
74	.atomic_destroy_state	= drm_atomic_helper_connector_destroy_state,
75};
76
77int mxsfb_create_output(struct drm_device *drm)
78{
79	struct mxsfb_drm_private *mxsfb = drm->dev_private;
80	int ret;
81
82	ret = drm_of_find_panel_or_bridge(drm->dev->of_node, 0, 0,
83					  &mxsfb->panel, &mxsfb->bridge);
84	if (ret)
85		return ret;
86
87	if (mxsfb->panel) {
88		mxsfb->connector = &mxsfb->panel_connector;
89		mxsfb->connector->dpms = DRM_MODE_DPMS_OFF;
90		mxsfb->connector->polled = 0;
91		drm_connector_helper_add(mxsfb->connector,
92					 &mxsfb_panel_connector_helper_funcs);
93		ret = drm_connector_init(drm, mxsfb->connector,
94					 &mxsfb_panel_connector_funcs,
95					 DRM_MODE_CONNECTOR_Unknown);
96	}
97
98	return ret;
99}