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
28 struct 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
rcar_du_lvds_connector_get_modes(struct drm_connector * connector)41 static 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
60 static 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
rcar_du_lvds_connector_destroy(struct drm_connector * connector)65 static void rcar_du_lvds_connector_destroy(struct drm_connector *connector)
66 {
67 drm_connector_unregister(connector);
68 drm_connector_cleanup(connector);
69 }
70
71 static enum drm_connector_status
rcar_du_lvds_connector_detect(struct drm_connector * connector,bool force)72 rcar_du_lvds_connector_detect(struct drm_connector *connector, bool force)
73 {
74 return connector_status_connected;
75 }
76
77 static 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
rcar_du_lvds_connector_init(struct rcar_du_device * rcdu,struct rcar_du_encoder * renc,struct device_node * np)87 int 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