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