1/*
2 * rcar_du_lvdscon.c  --  R-Car Display Unit LVDS Connector
3 *
4 * Copyright (C) 2013-2014 Renesas Electronics Corporation
5 *
6 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14#include <drm/drmP.h>
15#include <drm/drm_atomic_helper.h>
16#include <drm/drm_crtc.h>
17#include <drm/drm_crtc_helper.h>
18
19#include <video/display_timing.h>
20#include <video/of_display_timing.h>
21#include <video/videomode.h>
22
23#include "rcar_du_drv.h"
24#include "rcar_du_encoder.h"
25#include "rcar_du_kms.h"
26#include "rcar_du_lvdscon.h"
27
28struct rcar_du_lvds_connector {
29	struct rcar_du_connector connector;
30
31	struct {
32		unsigned int width_mm;		/* Panel width in mm */
33		unsigned int height_mm;		/* Panel height in mm */
34		struct videomode mode;
35	} panel;
36};
37
38#define to_rcar_lvds_connector(c) \
39	container_of(c, struct rcar_du_lvds_connector, connector.connector)
40
41static int rcar_du_lvds_connector_get_modes(struct drm_connector *connector)
42{
43	struct rcar_du_lvds_connector *lvdscon =
44		to_rcar_lvds_connector(connector);
45	struct drm_display_mode *mode;
46
47	mode = drm_mode_create(connector->dev);
48	if (mode == NULL)
49		return 0;
50
51	mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
52
53	drm_display_mode_from_videomode(&lvdscon->panel.mode, mode);
54
55	drm_mode_probed_add(connector, mode);
56
57	return 1;
58}
59
60static const struct drm_connector_helper_funcs connector_helper_funcs = {
61	.get_modes = rcar_du_lvds_connector_get_modes,
62	.best_encoder = rcar_du_connector_best_encoder,
63};
64
65static void rcar_du_lvds_connector_destroy(struct drm_connector *connector)
66{
67	drm_connector_unregister(connector);
68	drm_connector_cleanup(connector);
69}
70
71static enum drm_connector_status
72rcar_du_lvds_connector_detect(struct drm_connector *connector, bool force)
73{
74	return connector_status_connected;
75}
76
77static const struct drm_connector_funcs connector_funcs = {
78	.dpms = drm_atomic_helper_connector_dpms,
79	.reset = drm_atomic_helper_connector_reset,
80	.detect = rcar_du_lvds_connector_detect,
81	.fill_modes = drm_helper_probe_single_connector_modes,
82	.destroy = rcar_du_lvds_connector_destroy,
83	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
84	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
85};
86
87int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
88				struct rcar_du_encoder *renc,
89				/* TODO const */ struct device_node *np)
90{
91	struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
92	struct rcar_du_lvds_connector *lvdscon;
93	struct drm_connector *connector;
94	struct display_timing timing;
95	int ret;
96
97	lvdscon = devm_kzalloc(rcdu->dev, sizeof(*lvdscon), GFP_KERNEL);
98	if (lvdscon == NULL)
99		return -ENOMEM;
100
101	ret = of_get_display_timing(np, "panel-timing", &timing);
102	if (ret < 0)
103		return ret;
104
105	videomode_from_timing(&timing, &lvdscon->panel.mode);
106
107	of_property_read_u32(np, "width-mm", &lvdscon->panel.width_mm);
108	of_property_read_u32(np, "height-mm", &lvdscon->panel.height_mm);
109
110	connector = &lvdscon->connector.connector;
111	connector->display_info.width_mm = lvdscon->panel.width_mm;
112	connector->display_info.height_mm = lvdscon->panel.height_mm;
113
114	ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
115				 DRM_MODE_CONNECTOR_LVDS);
116	if (ret < 0)
117		return ret;
118
119	drm_connector_helper_add(connector, &connector_helper_funcs);
120	ret = drm_connector_register(connector);
121	if (ret < 0)
122		return ret;
123
124	connector->dpms = DRM_MODE_DPMS_OFF;
125	drm_object_property_set_value(&connector->base,
126		rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
127
128	ret = drm_mode_connector_attach_encoder(connector, encoder);
129	if (ret < 0)
130		return ret;
131
132	lvdscon->connector.encoder = renc;
133
134	return 0;
135}
136