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6
7#include <linux/clk.h>
8
9#include <drm/drmP.h>
10#include <drm/drm_atomic_helper.h>
11#include <drm/drm_crtc_helper.h>
12#include <drm/drm_of.h>
13#include <drm/drm_panel.h>
14
15#include "sun4i_crtc.h"
16#include "sun4i_tcon.h"
17#include "sun4i_lvds.h"
18
19struct sun4i_lvds {
20 struct drm_connector connector;
21 struct drm_encoder encoder;
22
23 struct sun4i_tcon *tcon;
24};
25
26static inline struct sun4i_lvds *
27drm_connector_to_sun4i_lvds(struct drm_connector *connector)
28{
29 return container_of(connector, struct sun4i_lvds,
30 connector);
31}
32
33static inline struct sun4i_lvds *
34drm_encoder_to_sun4i_lvds(struct drm_encoder *encoder)
35{
36 return container_of(encoder, struct sun4i_lvds,
37 encoder);
38}
39
40static int sun4i_lvds_get_modes(struct drm_connector *connector)
41{
42 struct sun4i_lvds *lvds =
43 drm_connector_to_sun4i_lvds(connector);
44 struct sun4i_tcon *tcon = lvds->tcon;
45
46 return drm_panel_get_modes(tcon->panel);
47}
48
49static struct drm_connector_helper_funcs sun4i_lvds_con_helper_funcs = {
50 .get_modes = sun4i_lvds_get_modes,
51};
52
53static void
54sun4i_lvds_connector_destroy(struct drm_connector *connector)
55{
56 struct sun4i_lvds *lvds = drm_connector_to_sun4i_lvds(connector);
57 struct sun4i_tcon *tcon = lvds->tcon;
58
59 drm_panel_detach(tcon->panel);
60 drm_connector_cleanup(connector);
61}
62
63static const struct drm_connector_funcs sun4i_lvds_con_funcs = {
64 .fill_modes = drm_helper_probe_single_connector_modes,
65 .destroy = sun4i_lvds_connector_destroy,
66 .reset = drm_atomic_helper_connector_reset,
67 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
68 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
69};
70
71static void sun4i_lvds_encoder_enable(struct drm_encoder *encoder)
72{
73 struct sun4i_lvds *lvds = drm_encoder_to_sun4i_lvds(encoder);
74 struct sun4i_tcon *tcon = lvds->tcon;
75
76 DRM_DEBUG_DRIVER("Enabling LVDS output\n");
77
78 if (!IS_ERR(tcon->panel)) {
79 drm_panel_prepare(tcon->panel);
80 drm_panel_enable(tcon->panel);
81 }
82}
83
84static void sun4i_lvds_encoder_disable(struct drm_encoder *encoder)
85{
86 struct sun4i_lvds *lvds = drm_encoder_to_sun4i_lvds(encoder);
87 struct sun4i_tcon *tcon = lvds->tcon;
88
89 DRM_DEBUG_DRIVER("Disabling LVDS output\n");
90
91 if (!IS_ERR(tcon->panel)) {
92 drm_panel_disable(tcon->panel);
93 drm_panel_unprepare(tcon->panel);
94 }
95}
96
97static const struct drm_encoder_helper_funcs sun4i_lvds_enc_helper_funcs = {
98 .disable = sun4i_lvds_encoder_disable,
99 .enable = sun4i_lvds_encoder_enable,
100};
101
102static const struct drm_encoder_funcs sun4i_lvds_enc_funcs = {
103 .destroy = drm_encoder_cleanup,
104};
105
106int sun4i_lvds_init(struct drm_device *drm, struct sun4i_tcon *tcon)
107{
108 struct drm_encoder *encoder;
109 struct drm_bridge *bridge;
110 struct sun4i_lvds *lvds;
111 int ret;
112
113 lvds = devm_kzalloc(drm->dev, sizeof(*lvds), GFP_KERNEL);
114 if (!lvds)
115 return -ENOMEM;
116 lvds->tcon = tcon;
117 encoder = &lvds->encoder;
118
119 ret = drm_of_find_panel_or_bridge(tcon->dev->of_node, 1, 0,
120 &tcon->panel, &bridge);
121 if (ret) {
122 dev_info(drm->dev, "No panel or bridge found... LVDS output disabled\n");
123 return 0;
124 }
125
126 drm_encoder_helper_add(&lvds->encoder,
127 &sun4i_lvds_enc_helper_funcs);
128 ret = drm_encoder_init(drm,
129 &lvds->encoder,
130 &sun4i_lvds_enc_funcs,
131 DRM_MODE_ENCODER_LVDS,
132 NULL);
133 if (ret) {
134 dev_err(drm->dev, "Couldn't initialise the lvds encoder\n");
135 goto err_out;
136 }
137
138
139 lvds->encoder.possible_crtcs = BIT(drm_crtc_index(&tcon->crtc->crtc));
140
141 if (tcon->panel) {
142 drm_connector_helper_add(&lvds->connector,
143 &sun4i_lvds_con_helper_funcs);
144 ret = drm_connector_init(drm, &lvds->connector,
145 &sun4i_lvds_con_funcs,
146 DRM_MODE_CONNECTOR_LVDS);
147 if (ret) {
148 dev_err(drm->dev, "Couldn't initialise the lvds connector\n");
149 goto err_cleanup_connector;
150 }
151
152 drm_mode_connector_attach_encoder(&lvds->connector,
153 &lvds->encoder);
154
155 ret = drm_panel_attach(tcon->panel, &lvds->connector);
156 if (ret) {
157 dev_err(drm->dev, "Couldn't attach our panel\n");
158 goto err_cleanup_connector;
159 }
160 }
161
162 if (bridge) {
163 ret = drm_bridge_attach(encoder, bridge, NULL);
164 if (ret) {
165 dev_err(drm->dev, "Couldn't attach our bridge\n");
166 goto err_cleanup_connector;
167 }
168 }
169
170 return 0;
171
172err_cleanup_connector:
173 drm_encoder_cleanup(&lvds->encoder);
174err_out:
175 return ret;
176}
177EXPORT_SYMBOL(sun4i_lvds_init);
178
