Commit | Line | Data |
---|---|---|
14b6873a AH |
1 | /* |
2 | * Exynos DRM Parallel output support. | |
3 | * | |
4 | * Copyright (c) 2014 Samsung Electronics Co., Ltd | |
5 | * | |
6 | * Contacts: Andrzej Hajda <a.hajda@samsung.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 version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #include <drm/drmP.h> | |
14 | #include <drm/drm_crtc_helper.h> | |
15 | #include <drm/drm_panel.h> | |
16 | ||
17 | #include <linux/regulator/consumer.h> | |
18 | ||
19 | #include <video/of_videomode.h> | |
20 | #include <video/videomode.h> | |
21 | ||
22 | #include "exynos_drm_drv.h" | |
23 | ||
24 | struct exynos_dpi { | |
4cfde1f2 | 25 | struct exynos_drm_display display; |
14b6873a AH |
26 | struct device *dev; |
27 | struct device_node *panel_node; | |
28 | ||
29 | struct drm_panel *panel; | |
30 | struct drm_connector connector; | |
31 | struct drm_encoder *encoder; | |
32 | ||
33 | struct videomode *vm; | |
34 | int dpms_mode; | |
35 | }; | |
36 | ||
37 | #define connector_to_dpi(c) container_of(c, struct exynos_dpi, connector) | |
38 | ||
4cfde1f2 AH |
39 | static inline struct exynos_dpi *display_to_dpi(struct exynos_drm_display *d) |
40 | { | |
41 | return container_of(d, struct exynos_dpi, display); | |
42 | } | |
43 | ||
14b6873a AH |
44 | static enum drm_connector_status |
45 | exynos_dpi_detect(struct drm_connector *connector, bool force) | |
46 | { | |
47 | struct exynos_dpi *ctx = connector_to_dpi(connector); | |
48 | ||
aaa51b13 | 49 | if (ctx->panel && !ctx->panel->connector) |
000cc920 | 50 | drm_panel_attach(ctx->panel, &ctx->connector); |
14b6873a | 51 | |
000cc920 | 52 | return connector_status_connected; |
14b6873a AH |
53 | } |
54 | ||
55 | static void exynos_dpi_connector_destroy(struct drm_connector *connector) | |
56 | { | |
34ea3d38 | 57 | drm_connector_unregister(connector); |
14b6873a AH |
58 | drm_connector_cleanup(connector); |
59 | } | |
60 | ||
61 | static struct drm_connector_funcs exynos_dpi_connector_funcs = { | |
62 | .dpms = drm_helper_connector_dpms, | |
63 | .detect = exynos_dpi_detect, | |
64 | .fill_modes = drm_helper_probe_single_connector_modes, | |
65 | .destroy = exynos_dpi_connector_destroy, | |
66 | }; | |
67 | ||
68 | static int exynos_dpi_get_modes(struct drm_connector *connector) | |
69 | { | |
70 | struct exynos_dpi *ctx = connector_to_dpi(connector); | |
71 | ||
72 | /* fimd timings gets precedence over panel modes */ | |
73 | if (ctx->vm) { | |
74 | struct drm_display_mode *mode; | |
75 | ||
76 | mode = drm_mode_create(connector->dev); | |
77 | if (!mode) { | |
78 | DRM_ERROR("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 ctx->panel->funcs->get_modes(ctx->panel); | |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
14b6873a AH |
93 | static struct drm_encoder * |
94 | exynos_dpi_best_encoder(struct drm_connector *connector) | |
95 | { | |
96 | struct exynos_dpi *ctx = connector_to_dpi(connector); | |
97 | ||
98 | return ctx->encoder; | |
99 | } | |
100 | ||
101 | static struct drm_connector_helper_funcs exynos_dpi_connector_helper_funcs = { | |
102 | .get_modes = exynos_dpi_get_modes, | |
14b6873a AH |
103 | .best_encoder = exynos_dpi_best_encoder, |
104 | }; | |
105 | ||
106 | static int exynos_dpi_create_connector(struct exynos_drm_display *display, | |
107 | struct drm_encoder *encoder) | |
108 | { | |
5af3d9bb | 109 | struct exynos_dpi *ctx = display_to_dpi(display); |
14b6873a AH |
110 | struct drm_connector *connector = &ctx->connector; |
111 | int ret; | |
112 | ||
113 | ctx->encoder = encoder; | |
114 | ||
ae08fe6c | 115 | connector->polled = DRM_CONNECTOR_POLL_HPD; |
14b6873a AH |
116 | |
117 | ret = drm_connector_init(encoder->dev, connector, | |
118 | &exynos_dpi_connector_funcs, | |
119 | DRM_MODE_CONNECTOR_VGA); | |
120 | if (ret) { | |
121 | DRM_ERROR("failed to initialize connector with drm\n"); | |
122 | return ret; | |
123 | } | |
124 | ||
125 | drm_connector_helper_add(connector, &exynos_dpi_connector_helper_funcs); | |
34ea3d38 | 126 | drm_connector_register(connector); |
14b6873a AH |
127 | drm_mode_connector_attach_encoder(connector, encoder); |
128 | ||
129 | return 0; | |
130 | } | |
131 | ||
132 | static void exynos_dpi_poweron(struct exynos_dpi *ctx) | |
133 | { | |
39bbde9c AK |
134 | if (ctx->panel) { |
135 | drm_panel_prepare(ctx->panel); | |
14b6873a | 136 | drm_panel_enable(ctx->panel); |
39bbde9c | 137 | } |
14b6873a AH |
138 | } |
139 | ||
140 | static void exynos_dpi_poweroff(struct exynos_dpi *ctx) | |
141 | { | |
39bbde9c | 142 | if (ctx->panel) { |
14b6873a | 143 | drm_panel_disable(ctx->panel); |
39bbde9c AK |
144 | drm_panel_unprepare(ctx->panel); |
145 | } | |
14b6873a AH |
146 | } |
147 | ||
148 | static void exynos_dpi_dpms(struct exynos_drm_display *display, int mode) | |
149 | { | |
5af3d9bb | 150 | struct exynos_dpi *ctx = display_to_dpi(display); |
14b6873a AH |
151 | |
152 | switch (mode) { | |
153 | case DRM_MODE_DPMS_ON: | |
154 | if (ctx->dpms_mode != DRM_MODE_DPMS_ON) | |
155 | exynos_dpi_poweron(ctx); | |
156 | break; | |
157 | case DRM_MODE_DPMS_STANDBY: | |
158 | case DRM_MODE_DPMS_SUSPEND: | |
159 | case DRM_MODE_DPMS_OFF: | |
160 | if (ctx->dpms_mode == DRM_MODE_DPMS_ON) | |
161 | exynos_dpi_poweroff(ctx); | |
162 | break; | |
163 | default: | |
164 | break; | |
10d9b4ed | 165 | } |
14b6873a AH |
166 | ctx->dpms_mode = mode; |
167 | } | |
168 | ||
169 | static struct exynos_drm_display_ops exynos_dpi_display_ops = { | |
170 | .create_connector = exynos_dpi_create_connector, | |
171 | .dpms = exynos_dpi_dpms | |
172 | }; | |
173 | ||
14b6873a AH |
174 | /* of_* functions will be removed after merge of of_graph patches */ |
175 | static struct device_node * | |
176 | of_get_child_by_name_reg(struct device_node *parent, const char *name, u32 reg) | |
177 | { | |
178 | struct device_node *np; | |
179 | ||
180 | for_each_child_of_node(parent, np) { | |
181 | u32 r; | |
182 | ||
183 | if (!np->name || of_node_cmp(np->name, name)) | |
184 | continue; | |
185 | ||
186 | if (of_property_read_u32(np, "reg", &r) < 0) | |
187 | r = 0; | |
188 | ||
189 | if (reg == r) | |
190 | break; | |
191 | } | |
192 | ||
193 | return np; | |
194 | } | |
195 | ||
196 | static struct device_node *of_graph_get_port_by_reg(struct device_node *parent, | |
197 | u32 reg) | |
198 | { | |
199 | struct device_node *ports, *port; | |
200 | ||
201 | ports = of_get_child_by_name(parent, "ports"); | |
202 | if (ports) | |
203 | parent = ports; | |
204 | ||
205 | port = of_get_child_by_name_reg(parent, "port", reg); | |
206 | ||
207 | of_node_put(ports); | |
208 | ||
209 | return port; | |
210 | } | |
211 | ||
212 | static struct device_node * | |
213 | of_graph_get_endpoint_by_reg(struct device_node *port, u32 reg) | |
214 | { | |
215 | return of_get_child_by_name_reg(port, "endpoint", reg); | |
216 | } | |
217 | ||
218 | static struct device_node * | |
219 | of_graph_get_remote_port_parent(const struct device_node *node) | |
220 | { | |
221 | struct device_node *np; | |
222 | unsigned int depth; | |
223 | ||
224 | np = of_parse_phandle(node, "remote-endpoint", 0); | |
225 | ||
226 | /* Walk 3 levels up only if there is 'ports' node. */ | |
227 | for (depth = 3; depth && np; depth--) { | |
228 | np = of_get_next_parent(np); | |
229 | if (depth == 2 && of_node_cmp(np->name, "ports")) | |
230 | break; | |
231 | } | |
232 | return np; | |
233 | } | |
234 | ||
235 | enum { | |
236 | FIMD_PORT_IN0, | |
237 | FIMD_PORT_IN1, | |
238 | FIMD_PORT_IN2, | |
239 | FIMD_PORT_RGB, | |
240 | FIMD_PORT_WRB, | |
241 | }; | |
242 | ||
f46ed1ab | 243 | static struct device_node *exynos_dpi_of_find_panel_node(struct device *dev) |
14b6873a AH |
244 | { |
245 | struct device_node *np, *ep; | |
246 | ||
247 | np = of_graph_get_port_by_reg(dev->of_node, FIMD_PORT_RGB); | |
248 | if (!np) | |
249 | return NULL; | |
250 | ||
251 | ep = of_graph_get_endpoint_by_reg(np, 0); | |
252 | of_node_put(np); | |
253 | if (!ep) | |
254 | return NULL; | |
255 | ||
256 | np = of_graph_get_remote_port_parent(ep); | |
257 | of_node_put(ep); | |
258 | ||
259 | return np; | |
260 | } | |
261 | ||
262 | static int exynos_dpi_parse_dt(struct exynos_dpi *ctx) | |
263 | { | |
264 | struct device *dev = ctx->dev; | |
265 | struct device_node *dn = dev->of_node; | |
266 | struct device_node *np; | |
267 | ||
268 | ctx->panel_node = exynos_dpi_of_find_panel_node(dev); | |
269 | ||
270 | np = of_get_child_by_name(dn, "display-timings"); | |
271 | if (np) { | |
272 | struct videomode *vm; | |
273 | int ret; | |
274 | ||
275 | of_node_put(np); | |
276 | ||
277 | vm = devm_kzalloc(dev, sizeof(*ctx->vm), GFP_KERNEL); | |
278 | if (!vm) | |
279 | return -ENOMEM; | |
280 | ||
281 | ret = of_get_videomode(dn, vm, 0); | |
000cc920 AH |
282 | if (ret < 0) { |
283 | devm_kfree(dev, vm); | |
14b6873a | 284 | return ret; |
000cc920 | 285 | } |
14b6873a AH |
286 | |
287 | ctx->vm = vm; | |
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
292 | if (!ctx->panel_node) | |
293 | return -EINVAL; | |
294 | ||
295 | return 0; | |
296 | } | |
297 | ||
000cc920 | 298 | struct exynos_drm_display *exynos_dpi_probe(struct device *dev) |
14b6873a AH |
299 | { |
300 | struct exynos_dpi *ctx; | |
301 | int ret; | |
302 | ||
303 | ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); | |
304 | if (!ctx) | |
4cfde1f2 | 305 | return ERR_PTR(-ENOMEM); |
14b6873a | 306 | |
4cfde1f2 AH |
307 | ctx->display.type = EXYNOS_DISPLAY_TYPE_LCD; |
308 | ctx->display.ops = &exynos_dpi_display_ops; | |
14b6873a | 309 | ctx->dev = dev; |
14b6873a AH |
310 | ctx->dpms_mode = DRM_MODE_DPMS_OFF; |
311 | ||
4cfde1f2 AH |
312 | ret = exynos_drm_component_add(dev, |
313 | EXYNOS_DEVICE_TYPE_CONNECTOR, | |
314 | ctx->display.type); | |
315 | if (ret) | |
316 | return ERR_PTR(ret); | |
317 | ||
14b6873a | 318 | ret = exynos_dpi_parse_dt(ctx); |
000cc920 AH |
319 | if (ret < 0) { |
320 | devm_kfree(dev, ctx); | |
df5225bc | 321 | goto err_del_component; |
000cc920 AH |
322 | } |
323 | ||
324 | if (ctx->panel_node) { | |
325 | ctx->panel = of_drm_find_panel(ctx->panel_node); | |
df5225bc ID |
326 | if (!ctx->panel) { |
327 | exynos_drm_component_del(dev, | |
328 | EXYNOS_DEVICE_TYPE_CONNECTOR); | |
000cc920 | 329 | return ERR_PTR(-EPROBE_DEFER); |
df5225bc | 330 | } |
000cc920 | 331 | } |
14b6873a | 332 | |
4cfde1f2 | 333 | return &ctx->display; |
df5225bc ID |
334 | |
335 | err_del_component: | |
336 | exynos_drm_component_del(dev, EXYNOS_DEVICE_TYPE_CONNECTOR); | |
337 | ||
338 | return NULL; | |
14b6873a AH |
339 | } |
340 | ||
4cfde1f2 | 341 | int exynos_dpi_remove(struct exynos_drm_display *display) |
14b6873a | 342 | { |
4cfde1f2 | 343 | struct exynos_dpi *ctx = display_to_dpi(display); |
f37cd5e8 | 344 | |
4cfde1f2 | 345 | exynos_dpi_dpms(&ctx->display, DRM_MODE_DPMS_OFF); |
90eac897 | 346 | |
90eac897 AH |
347 | if (ctx->panel) |
348 | drm_panel_detach(ctx->panel); | |
14b6873a | 349 | |
4cfde1f2 | 350 | exynos_drm_component_del(ctx->dev, EXYNOS_DEVICE_TYPE_CONNECTOR); |
df5225bc | 351 | |
14b6873a AH |
352 | return 0; |
353 | } |