summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c
blob: 0c43032fc69318b294d3cf2baa29862bedb77d14 (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
/*
 * rcar_du_lvdscon.c  --  R-Car Display Unit LVDS Connector
 *
 * Copyright (C) 2013-2014 Renesas Electronics Corporation
 *
 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
 *
 * 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 <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>

#include <video/display_timing.h>
#include <video/of_display_timing.h>
#include <video/videomode.h>

#include "rcar_du_drv.h"
#include "rcar_du_encoder.h"
#include "rcar_du_kms.h"
#include "rcar_du_lvdscon.h"

struct rcar_du_lvds_connector {
	struct rcar_du_connector connector;

	struct {
		unsigned int width_mm;		/* Panel width in mm */
		unsigned int height_mm;		/* Panel height in mm */
		struct videomode mode;
	} panel;
};

#define to_rcar_lvds_connector(c) \
	container_of(c, struct rcar_du_lvds_connector, connector.connector)

static int rcar_du_lvds_connector_get_modes(struct drm_connector *connector)
{
	struct rcar_du_lvds_connector *lvdscon =
		to_rcar_lvds_connector(connector);
	struct drm_display_mode *mode;

	mode = drm_mode_create(connector->dev);
	if (mode == NULL)
		return 0;

	mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;

	drm_display_mode_from_videomode(&lvdscon->panel.mode, mode);

	drm_mode_probed_add(connector, mode);

	return 1;
}

static const struct drm_connector_helper_funcs connector_helper_funcs = {
	.get_modes = rcar_du_lvds_connector_get_modes,
	.best_encoder = rcar_du_connector_best_encoder,
};

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

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

static const struct drm_connector_funcs connector_funcs = {
	.dpms = drm_atomic_helper_connector_dpms,
	.reset = drm_atomic_helper_connector_reset,
	.detect = rcar_du_lvds_connector_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.destroy = rcar_du_lvds_connector_destroy,
	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};

int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
				struct rcar_du_encoder *renc,
				/* TODO const */ struct device_node *np)
{
	struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
	struct rcar_du_lvds_connector *lvdscon;
	struct drm_connector *connector;
	struct display_timing timing;
	int ret;

	lvdscon = devm_kzalloc(rcdu->dev, sizeof(*lvdscon), GFP_KERNEL);
	if (lvdscon == NULL)
		return -ENOMEM;

	ret = of_get_display_timing(np, "panel-timing", &timing);
	if (ret < 0)
		return ret;

	videomode_from_timing(&timing, &lvdscon->panel.mode);

	of_property_read_u32(np, "width-mm", &lvdscon->panel.width_mm);
	of_property_read_u32(np, "height-mm", &lvdscon->panel.height_mm);

	connector = &lvdscon->connector.connector;
	connector->display_info.width_mm = lvdscon->panel.width_mm;
	connector->display_info.height_mm = lvdscon->panel.height_mm;

	ret = drm_connector_init(rcdu->ddev, connector, &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)
		return ret;

	connector->dpms = DRM_MODE_DPMS_OFF;
	drm_object_property_set_value(&connector->base,
		rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);

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

	lvdscon->connector.encoder = renc;

	return 0;
}