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cd5351f4 RC |
1 | /* |
2 | * drivers/staging/omapdrm/omap_connector.c | |
3 | * | |
4 | * Copyright (C) 2011 Texas Instruments | |
5 | * Author: Rob Clark <rob@ti.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License version 2 as published by | |
9 | * the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | * more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along with | |
17 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include "omap_drv.h" | |
21 | ||
22 | #include "drm_crtc.h" | |
23 | #include "drm_crtc_helper.h" | |
24 | ||
25 | /* | |
26 | * connector funcs | |
27 | */ | |
28 | ||
29 | #define to_omap_connector(x) container_of(x, struct omap_connector, base) | |
30 | ||
31 | struct omap_connector { | |
32 | struct drm_connector base; | |
33 | struct omap_dss_device *dssdev; | |
34 | }; | |
35 | ||
36 | static inline void copy_timings_omap_to_drm(struct drm_display_mode *mode, | |
37 | struct omap_video_timings *timings) | |
38 | { | |
39 | mode->clock = timings->pixel_clock; | |
40 | ||
41 | mode->hdisplay = timings->x_res; | |
42 | mode->hsync_start = mode->hdisplay + timings->hfp; | |
43 | mode->hsync_end = mode->hsync_start + timings->hsw; | |
44 | mode->htotal = mode->hsync_end + timings->hbp; | |
45 | ||
46 | mode->vdisplay = timings->y_res; | |
47 | mode->vsync_start = mode->vdisplay + timings->vfp; | |
48 | mode->vsync_end = mode->vsync_start + timings->vsw; | |
49 | mode->vtotal = mode->vsync_end + timings->vbp; | |
50 | ||
51 | /* note: whether or not it is interlaced, +/- h/vsync, etc, | |
52 | * which should be set in the mode flags, is not exposed in | |
53 | * the omap_video_timings struct.. but hdmi driver tracks | |
54 | * those separately so all we have to have to set the mode | |
55 | * is the way to recover these timings values, and the | |
56 | * omap_dss_driver would do the rest. | |
57 | */ | |
58 | } | |
59 | ||
60 | static inline void copy_timings_drm_to_omap(struct omap_video_timings *timings, | |
61 | struct drm_display_mode *mode) | |
62 | { | |
63 | timings->pixel_clock = mode->clock; | |
64 | ||
65 | timings->x_res = mode->hdisplay; | |
66 | timings->hfp = mode->hsync_start - mode->hdisplay; | |
67 | timings->hsw = mode->hsync_end - mode->hsync_start; | |
68 | timings->hbp = mode->htotal - mode->hsync_end; | |
69 | ||
70 | timings->y_res = mode->vdisplay; | |
71 | timings->vfp = mode->vsync_start - mode->vdisplay; | |
72 | timings->vsw = mode->vsync_end - mode->vsync_start; | |
73 | timings->vbp = mode->vtotal - mode->vsync_end; | |
74 | } | |
75 | ||
76 | static void omap_connector_dpms(struct drm_connector *connector, int mode) | |
77 | { | |
78 | struct omap_connector *omap_connector = to_omap_connector(connector); | |
79 | struct omap_dss_device *dssdev = omap_connector->dssdev; | |
80 | int old_dpms; | |
81 | ||
82 | DBG("%s: %d", dssdev->name, mode); | |
83 | ||
84 | old_dpms = connector->dpms; | |
85 | ||
86 | /* from off to on, do from crtc to connector */ | |
87 | if (mode < old_dpms) | |
88 | drm_helper_connector_dpms(connector, mode); | |
89 | ||
90 | if (mode == DRM_MODE_DPMS_ON) { | |
91 | /* store resume info for suspended displays */ | |
92 | switch (dssdev->state) { | |
93 | case OMAP_DSS_DISPLAY_SUSPENDED: | |
94 | dssdev->activate_after_resume = true; | |
95 | break; | |
96 | case OMAP_DSS_DISPLAY_DISABLED: { | |
97 | int ret = dssdev->driver->enable(dssdev); | |
98 | if (ret) { | |
99 | DBG("%s: failed to enable: %d", | |
100 | dssdev->name, ret); | |
101 | dssdev->driver->disable(dssdev); | |
102 | } | |
103 | break; | |
104 | } | |
105 | default: | |
106 | break; | |
107 | } | |
108 | } else { | |
109 | /* TODO */ | |
110 | } | |
111 | ||
112 | /* from on to off, do from connector to crtc */ | |
113 | if (mode > old_dpms) | |
114 | drm_helper_connector_dpms(connector, mode); | |
115 | } | |
116 | ||
117 | enum drm_connector_status omap_connector_detect( | |
118 | struct drm_connector *connector, bool force) | |
119 | { | |
120 | struct omap_connector *omap_connector = to_omap_connector(connector); | |
121 | struct omap_dss_device *dssdev = omap_connector->dssdev; | |
122 | struct omap_dss_driver *dssdrv = dssdev->driver; | |
123 | enum drm_connector_status ret; | |
124 | ||
125 | if (dssdrv->detect) { | |
126 | if (dssdrv->detect(dssdev)) { | |
127 | ret = connector_status_connected; | |
128 | } else { | |
129 | ret = connector_status_disconnected; | |
130 | } | |
131 | } else { | |
132 | ret = connector_status_unknown; | |
133 | } | |
134 | ||
135 | VERB("%s: %d (force=%d)", omap_connector->dssdev->name, ret, force); | |
136 | ||
137 | return ret; | |
138 | } | |
139 | ||
140 | static void omap_connector_destroy(struct drm_connector *connector) | |
141 | { | |
142 | struct omap_connector *omap_connector = to_omap_connector(connector); | |
143 | struct omap_dss_device *dssdev = omap_connector->dssdev; | |
144 | ||
145 | dssdev->driver->disable(dssdev); | |
146 | ||
147 | DBG("%s", omap_connector->dssdev->name); | |
148 | drm_sysfs_connector_remove(connector); | |
149 | drm_connector_cleanup(connector); | |
150 | kfree(omap_connector); | |
151 | ||
152 | omap_dss_put_device(dssdev); | |
153 | } | |
154 | ||
155 | #define MAX_EDID 512 | |
156 | ||
157 | static int omap_connector_get_modes(struct drm_connector *connector) | |
158 | { | |
159 | struct omap_connector *omap_connector = to_omap_connector(connector); | |
160 | struct omap_dss_device *dssdev = omap_connector->dssdev; | |
161 | struct omap_dss_driver *dssdrv = dssdev->driver; | |
162 | struct drm_device *dev = connector->dev; | |
163 | int n = 0; | |
164 | ||
165 | DBG("%s", omap_connector->dssdev->name); | |
166 | ||
167 | /* if display exposes EDID, then we parse that in the normal way to | |
168 | * build table of supported modes.. otherwise (ie. fixed resolution | |
169 | * LCD panels) we just return a single mode corresponding to the | |
170 | * currently configured timings: | |
171 | */ | |
172 | if (dssdrv->read_edid) { | |
173 | void *edid = kzalloc(MAX_EDID, GFP_KERNEL); | |
174 | ||
175 | if ((dssdrv->read_edid(dssdev, edid, MAX_EDID) > 0) && | |
176 | drm_edid_is_valid(edid)) { | |
177 | drm_mode_connector_update_edid_property( | |
178 | connector, edid); | |
179 | n = drm_add_edid_modes(connector, edid); | |
cd5351f4 RC |
180 | } else { |
181 | drm_mode_connector_update_edid_property( | |
182 | connector, NULL); | |
cd5351f4 | 183 | } |
451023dc | 184 | kfree(edid); |
cd5351f4 RC |
185 | } else { |
186 | struct drm_display_mode *mode = drm_mode_create(dev); | |
187 | struct omap_video_timings timings; | |
188 | ||
189 | dssdrv->get_timings(dssdev, &timings); | |
190 | ||
191 | copy_timings_omap_to_drm(mode, &timings); | |
192 | ||
193 | mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; | |
194 | drm_mode_set_name(mode); | |
195 | drm_mode_probed_add(connector, mode); | |
196 | ||
197 | n = 1; | |
198 | } | |
199 | ||
200 | return n; | |
201 | } | |
202 | ||
203 | static int omap_connector_mode_valid(struct drm_connector *connector, | |
204 | struct drm_display_mode *mode) | |
205 | { | |
206 | struct omap_connector *omap_connector = to_omap_connector(connector); | |
207 | struct omap_dss_device *dssdev = omap_connector->dssdev; | |
208 | struct omap_dss_driver *dssdrv = dssdev->driver; | |
209 | struct omap_video_timings timings = {0}; | |
210 | struct drm_device *dev = connector->dev; | |
211 | struct drm_display_mode *new_mode; | |
212 | int ret = MODE_BAD; | |
213 | ||
214 | copy_timings_drm_to_omap(&timings, mode); | |
215 | mode->vrefresh = drm_mode_vrefresh(mode); | |
216 | ||
217 | if (!dssdrv->check_timings(dssdev, &timings)) { | |
218 | /* check if vrefresh is still valid */ | |
219 | new_mode = drm_mode_duplicate(dev, mode); | |
220 | new_mode->clock = timings.pixel_clock; | |
221 | new_mode->vrefresh = 0; | |
222 | if (mode->vrefresh == drm_mode_vrefresh(new_mode)) | |
223 | ret = MODE_OK; | |
224 | drm_mode_destroy(dev, new_mode); | |
225 | } | |
226 | ||
227 | DBG("connector: mode %s: " | |
228 | "%d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x", | |
229 | (ret == MODE_OK) ? "valid" : "invalid", | |
230 | mode->base.id, mode->name, mode->vrefresh, mode->clock, | |
231 | mode->hdisplay, mode->hsync_start, | |
232 | mode->hsync_end, mode->htotal, | |
233 | mode->vdisplay, mode->vsync_start, | |
234 | mode->vsync_end, mode->vtotal, mode->type, mode->flags); | |
235 | ||
236 | return ret; | |
237 | } | |
238 | ||
239 | struct drm_encoder *omap_connector_attached_encoder( | |
240 | struct drm_connector *connector) | |
241 | { | |
242 | int i; | |
243 | struct omap_connector *omap_connector = to_omap_connector(connector); | |
244 | ||
245 | for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { | |
246 | struct drm_mode_object *obj; | |
247 | ||
248 | if (connector->encoder_ids[i] == 0) | |
249 | break; | |
250 | ||
251 | obj = drm_mode_object_find(connector->dev, | |
252 | connector->encoder_ids[i], | |
253 | DRM_MODE_OBJECT_ENCODER); | |
254 | ||
255 | if (obj) { | |
256 | struct drm_encoder *encoder = obj_to_encoder(obj); | |
257 | struct omap_overlay_manager *mgr = | |
258 | omap_encoder_get_manager(encoder); | |
259 | DBG("%s: found %s", omap_connector->dssdev->name, | |
260 | mgr->name); | |
261 | return encoder; | |
262 | } | |
263 | } | |
264 | ||
265 | DBG("%s: no encoder", omap_connector->dssdev->name); | |
266 | ||
267 | return NULL; | |
268 | } | |
269 | ||
270 | static const struct drm_connector_funcs omap_connector_funcs = { | |
271 | .dpms = omap_connector_dpms, | |
272 | .detect = omap_connector_detect, | |
273 | .fill_modes = drm_helper_probe_single_connector_modes, | |
274 | .destroy = omap_connector_destroy, | |
275 | }; | |
276 | ||
277 | static const struct drm_connector_helper_funcs omap_connector_helper_funcs = { | |
278 | .get_modes = omap_connector_get_modes, | |
279 | .mode_valid = omap_connector_mode_valid, | |
280 | .best_encoder = omap_connector_attached_encoder, | |
281 | }; | |
282 | ||
283 | /* called from encoder when mode is set, to propagate settings to the dssdev */ | |
284 | void omap_connector_mode_set(struct drm_connector *connector, | |
285 | struct drm_display_mode *mode) | |
286 | { | |
287 | struct drm_device *dev = connector->dev; | |
288 | struct omap_connector *omap_connector = to_omap_connector(connector); | |
289 | struct omap_dss_device *dssdev = omap_connector->dssdev; | |
290 | struct omap_dss_driver *dssdrv = dssdev->driver; | |
291 | struct omap_video_timings timings; | |
292 | ||
293 | copy_timings_drm_to_omap(&timings, mode); | |
294 | ||
295 | DBG("%s: set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x", | |
296 | omap_connector->dssdev->name, | |
297 | mode->base.id, mode->name, mode->vrefresh, mode->clock, | |
298 | mode->hdisplay, mode->hsync_start, | |
299 | mode->hsync_end, mode->htotal, | |
300 | mode->vdisplay, mode->vsync_start, | |
301 | mode->vsync_end, mode->vtotal, mode->type, mode->flags); | |
302 | ||
303 | if (dssdrv->check_timings(dssdev, &timings)) { | |
304 | dev_err(dev->dev, "could not set timings\n"); | |
305 | return; | |
306 | } | |
307 | ||
308 | dssdrv->set_timings(dssdev, &timings); | |
309 | } | |
310 | ||
311 | /* flush an area of the framebuffer (in case of manual update display that | |
312 | * is not automatically flushed) | |
313 | */ | |
314 | void omap_connector_flush(struct drm_connector *connector, | |
315 | int x, int y, int w, int h) | |
316 | { | |
317 | struct omap_connector *omap_connector = to_omap_connector(connector); | |
318 | ||
319 | /* TODO: enable when supported in dss */ | |
320 | VERB("%s: %d,%d, %dx%d", omap_connector->dssdev->name, x, y, w, h); | |
321 | } | |
322 | ||
323 | /* initialize connector */ | |
324 | struct drm_connector *omap_connector_init(struct drm_device *dev, | |
325 | int connector_type, struct omap_dss_device *dssdev) | |
326 | { | |
327 | struct drm_connector *connector = NULL; | |
328 | struct omap_connector *omap_connector; | |
329 | ||
330 | DBG("%s", dssdev->name); | |
331 | ||
332 | omap_dss_get_device(dssdev); | |
333 | ||
334 | omap_connector = kzalloc(sizeof(struct omap_connector), GFP_KERNEL); | |
335 | if (!omap_connector) { | |
336 | dev_err(dev->dev, "could not allocate connector\n"); | |
337 | goto fail; | |
338 | } | |
339 | ||
340 | omap_connector->dssdev = dssdev; | |
341 | connector = &omap_connector->base; | |
342 | ||
343 | drm_connector_init(dev, connector, &omap_connector_funcs, | |
344 | connector_type); | |
345 | drm_connector_helper_add(connector, &omap_connector_helper_funcs); | |
346 | ||
347 | #if 0 /* enable when dss2 supports hotplug */ | |
348 | if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_HPD) | |
349 | connector->polled = 0; | |
350 | else | |
351 | #endif | |
352 | connector->polled = DRM_CONNECTOR_POLL_CONNECT | | |
353 | DRM_CONNECTOR_POLL_DISCONNECT; | |
354 | ||
355 | connector->interlace_allowed = 1; | |
356 | connector->doublescan_allowed = 0; | |
357 | ||
358 | drm_sysfs_connector_add(connector); | |
359 | ||
360 | return connector; | |
361 | ||
362 | fail: | |
363 | if (connector) { | |
364 | omap_connector_destroy(connector); | |
365 | } | |
366 | ||
367 | return NULL; | |
368 | } |