summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
blob: 8780deba5e8aa34fc58405592144a3f7a1c99a3e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
/*
 * Copyright 2015 Freescale Semiconductor, Inc.
 *
 * Freescale DCU drm device driver
 *
 * 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.
 */

#include <linux/backlight.h>

#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_panel.h>

#include "fsl_dcu_drm_drv.h"

static int
fsl_dcu_drm_encoder_atomic_check(struct drm_encoder *encoder,
				 struct drm_crtc_state *crtc_state,
				 struct drm_connector_state *conn_state)
{
	return 0;
}

static void fsl_dcu_drm_encoder_disable(struct drm_encoder *encoder)
{
}

static void fsl_dcu_drm_encoder_enable(struct drm_encoder *encoder)
{
}

static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
	.atomic_check = fsl_dcu_drm_encoder_atomic_check,
	.disable = fsl_dcu_drm_encoder_disable,
	.enable = fsl_dcu_drm_encoder_enable,
};

static void fsl_dcu_drm_encoder_destroy(struct drm_encoder *encoder)
{
	drm_encoder_cleanup(encoder);
}

static const struct drm_encoder_funcs encoder_funcs = {
	.destroy = fsl_dcu_drm_encoder_destroy,
};

int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
			       struct drm_crtc *crtc)
{
	struct drm_encoder *encoder = &fsl_dev->encoder;
	int ret;

	encoder->possible_crtcs = 1;
	ret = drm_encoder_init(fsl_dev->drm, encoder, &encoder_funcs,
			       DRM_MODE_ENCODER_LVDS, NULL);
	if (ret < 0)
		return ret;

	drm_encoder_helper_add(encoder, &encoder_helper_funcs);

	return 0;
}

static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
{
	drm_connector_unregister(connector);
	drm_connector_cleanup(connector);
}

static enum drm_connector_status
fsl_dcu_drm_connector_detect(struct drm_connector *connector, bool force)
{
	return connector_status_connected;
}

static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
	.destroy = fsl_dcu_drm_connector_destroy,
	.detect = fsl_dcu_drm_connector_detect,
	.dpms = drm_atomic_helper_connector_dpms,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.reset = drm_atomic_helper_connector_reset,
};

static struct drm_encoder *
fsl_dcu_drm_connector_best_encoder(struct drm_connector *connector)
{
	struct fsl_dcu_drm_connector *fsl_con = to_fsl_dcu_connector(connector);

	return fsl_con->encoder;
}

static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
{
	struct fsl_dcu_drm_connector *fsl_connector;
	int (*get_modes)(struct drm_panel *panel);
	int num_modes = 0;

	fsl_connector = to_fsl_dcu_connector(connector);
	if (fsl_connector->panel && fsl_connector->panel->funcs &&
	    fsl_connector->panel->funcs->get_modes) {
		get_modes = fsl_connector->panel->funcs->get_modes;
		num_modes = get_modes(fsl_connector->panel);
	}

	return num_modes;
}

static int fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,
					    struct drm_display_mode *mode)
{
	if (mode->hdisplay & 0xf)
		return MODE_ERROR;

	return MODE_OK;
}

static const struct drm_connector_helper_funcs connector_helper_funcs = {
	.best_encoder = fsl_dcu_drm_connector_best_encoder,
	.get_modes = fsl_dcu_drm_connector_get_modes,
	.mode_valid = fsl_dcu_drm_connector_mode_valid,
};

int fsl_dcu_drm_connector_create(struct fsl_dcu_drm_device *fsl_dev,
				 struct drm_encoder *encoder)
{
	struct drm_connector *connector = &fsl_dev->connector.base;
	struct drm_mode_config mode_config = fsl_dev->drm->mode_config;
	struct device_node *panel_node;
	int ret;

	fsl_dev->connector.encoder = encoder;

	ret = drm_connector_init(fsl_dev->drm, connector,
				 &fsl_dcu_drm_connector_funcs,
				 DRM_MODE_CONNECTOR_LVDS);
	if (ret < 0)
		return ret;

	drm_connector_helper_add(connector, &connector_helper_funcs);
	ret = drm_connector_register(connector);
	if (ret < 0)
		goto err_cleanup;

	ret = drm_mode_connector_attach_encoder(connector, encoder);
	if (ret < 0)
		goto err_sysfs;

	drm_object_property_set_value(&connector->base,
				      mode_config.dpms_property,
				      DRM_MODE_DPMS_OFF);

	panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
	if (panel_node) {
		fsl_dev->connector.panel = of_drm_find_panel(panel_node);
		if (!fsl_dev->connector.panel) {
			ret = -EPROBE_DEFER;
			goto err_sysfs;
		}
	of_node_put(panel_node);
	}

	ret = drm_panel_attach(fsl_dev->connector.panel, connector);
	if (ret) {
		dev_err(fsl_dev->dev, "failed to attach panel\n");
		goto err_sysfs;
	}

	return 0;

err_sysfs:
	drm_connector_unregister(connector);
err_cleanup:
	drm_connector_cleanup(connector);
	return ret;
}