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