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10#include <linux/of_graph.h>
11#include <linux/regulator/consumer.h>
12
13#include <drm/drm_atomic_helper.h>
14#include <drm/drm_panel.h>
15#include <drm/drm_print.h>
16#include <drm/drm_probe_helper.h>
17
18#include <video/of_videomode.h>
19#include <video/videomode.h>
20
21#include "exynos_drm_crtc.h"
22
23struct exynos_dpi {
24 struct drm_encoder encoder;
25 struct device *dev;
26 struct device_node *panel_node;
27
28 struct drm_panel *panel;
29 struct drm_connector connector;
30
31 struct videomode *vm;
32};
33
34#define connector_to_dpi(c) container_of(c, struct exynos_dpi, connector)
35
36static inline struct exynos_dpi *encoder_to_dpi(struct drm_encoder *e)
37{
38 return container_of(e, struct exynos_dpi, encoder);
39}
40
41static enum drm_connector_status
42exynos_dpi_detect(struct drm_connector *connector, bool force)
43{
44 struct exynos_dpi *ctx = connector_to_dpi(connector);
45
46 if (ctx->panel)
47 drm_panel_attach(ctx->panel, &ctx->connector);
48
49 return connector_status_connected;
50}
51
52static void exynos_dpi_connector_destroy(struct drm_connector *connector)
53{
54 drm_connector_unregister(connector);
55 drm_connector_cleanup(connector);
56}
57
58static const struct drm_connector_funcs exynos_dpi_connector_funcs = {
59 .detect = exynos_dpi_detect,
60 .fill_modes = drm_helper_probe_single_connector_modes,
61 .destroy = exynos_dpi_connector_destroy,
62 .reset = drm_atomic_helper_connector_reset,
63 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
64 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
65};
66
67static int exynos_dpi_get_modes(struct drm_connector *connector)
68{
69 struct exynos_dpi *ctx = connector_to_dpi(connector);
70
71
72 if (ctx->vm) {
73 struct drm_display_mode *mode;
74
75 mode = drm_mode_create(connector->dev);
76 if (!mode) {
77 DRM_DEV_ERROR(ctx->dev,
78 "failed to create a new display mode\n");
79 return 0;
80 }
81 drm_display_mode_from_videomode(ctx->vm, mode);
82 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
83 drm_mode_probed_add(connector, mode);
84 return 1;
85 }
86
87 if (ctx->panel)
88 return drm_panel_get_modes(ctx->panel, connector);
89
90 return 0;
91}
92
93static const struct drm_connector_helper_funcs exynos_dpi_connector_helper_funcs = {
94 .get_modes = exynos_dpi_get_modes,
95};
96
97static int exynos_dpi_create_connector(struct drm_encoder *encoder)
98{
99 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
100 struct drm_connector *connector = &ctx->connector;
101 int ret;
102
103 connector->polled = DRM_CONNECTOR_POLL_HPD;
104
105 ret = drm_connector_init(encoder->dev, connector,
106 &exynos_dpi_connector_funcs,
107 DRM_MODE_CONNECTOR_VGA);
108 if (ret) {
109 DRM_DEV_ERROR(ctx->dev,
110 "failed to initialize connector with drm\n");
111 return ret;
112 }
113
114 drm_connector_helper_add(connector, &exynos_dpi_connector_helper_funcs);
115 drm_connector_attach_encoder(connector, encoder);
116
117 return 0;
118}
119
120static void exynos_dpi_mode_set(struct drm_encoder *encoder,
121 struct drm_display_mode *mode,
122 struct drm_display_mode *adjusted_mode)
123{
124}
125
126static void exynos_dpi_enable(struct drm_encoder *encoder)
127{
128 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
129
130 if (ctx->panel) {
131 drm_panel_prepare(ctx->panel);
132 drm_panel_enable(ctx->panel);
133 }
134}
135
136static void exynos_dpi_disable(struct drm_encoder *encoder)
137{
138 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
139
140 if (ctx->panel) {
141 drm_panel_disable(ctx->panel);
142 drm_panel_unprepare(ctx->panel);
143 }
144}
145
146static const struct drm_encoder_helper_funcs exynos_dpi_encoder_helper_funcs = {
147 .mode_set = exynos_dpi_mode_set,
148 .enable = exynos_dpi_enable,
149 .disable = exynos_dpi_disable,
150};
151
152static const struct drm_encoder_funcs exynos_dpi_encoder_funcs = {
153 .destroy = drm_encoder_cleanup,
154};
155
156enum {
157 FIMD_PORT_IN0,
158 FIMD_PORT_IN1,
159 FIMD_PORT_IN2,
160 FIMD_PORT_RGB,
161 FIMD_PORT_WRB,
162};
163
164static int exynos_dpi_parse_dt(struct exynos_dpi *ctx)
165{
166 struct device *dev = ctx->dev;
167 struct device_node *dn = dev->of_node;
168 struct device_node *np;
169
170 ctx->panel_node = of_graph_get_remote_node(dn, FIMD_PORT_RGB, 0);
171
172 np = of_get_child_by_name(dn, "display-timings");
173 if (np) {
174 struct videomode *vm;
175 int ret;
176
177 of_node_put(np);
178
179 vm = devm_kzalloc(dev, sizeof(*ctx->vm), GFP_KERNEL);
180 if (!vm)
181 return -ENOMEM;
182
183 ret = of_get_videomode(dn, vm, 0);
184 if (ret < 0) {
185 devm_kfree(dev, vm);
186 return ret;
187 }
188
189 ctx->vm = vm;
190
191 return 0;
192 }
193
194 if (!ctx->panel_node)
195 return -EINVAL;
196
197 return 0;
198}
199
200int exynos_dpi_bind(struct drm_device *dev, struct drm_encoder *encoder)
201{
202 int ret;
203
204 drm_encoder_init(dev, encoder, &exynos_dpi_encoder_funcs,
205 DRM_MODE_ENCODER_TMDS, NULL);
206
207 drm_encoder_helper_add(encoder, &exynos_dpi_encoder_helper_funcs);
208
209 ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD);
210 if (ret < 0)
211 return ret;
212
213 ret = exynos_dpi_create_connector(encoder);
214 if (ret) {
215 DRM_DEV_ERROR(encoder_to_dpi(encoder)->dev,
216 "failed to create connector ret = %d\n", ret);
217 drm_encoder_cleanup(encoder);
218 return ret;
219 }
220
221 return 0;
222}
223
224struct drm_encoder *exynos_dpi_probe(struct device *dev)
225{
226 struct exynos_dpi *ctx;
227 int ret;
228
229 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
230 if (!ctx)
231 return ERR_PTR(-ENOMEM);
232
233 ctx->dev = dev;
234
235 ret = exynos_dpi_parse_dt(ctx);
236 if (ret < 0) {
237 devm_kfree(dev, ctx);
238 return NULL;
239 }
240
241 if (ctx->panel_node) {
242 ctx->panel = of_drm_find_panel(ctx->panel_node);
243 if (IS_ERR(ctx->panel))
244 return ERR_CAST(ctx->panel);
245 }
246
247 return &ctx->encoder;
248}
249
250int exynos_dpi_remove(struct drm_encoder *encoder)
251{
252 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
253
254 exynos_dpi_disable(&ctx->encoder);
255
256 if (ctx->panel)
257 drm_panel_detach(ctx->panel);
258
259 return 0;
260}
261
