1 /*
2 * drivers/gpu/drm/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 struct drm_encoder *encoder;
35 };
36
copy_timings_omap_to_drm(struct drm_display_mode * mode,struct omap_video_timings * timings)37 void copy_timings_omap_to_drm(struct drm_display_mode *mode,
38 struct omap_video_timings *timings)
39 {
40 mode->clock = timings->pixel_clock;
41
42 mode->hdisplay = timings->x_res;
43 mode->hsync_start = mode->hdisplay + timings->hfp;
44 mode->hsync_end = mode->hsync_start + timings->hsw;
45 mode->htotal = mode->hsync_end + timings->hbp;
46
47 mode->vdisplay = timings->y_res;
48 mode->vsync_start = mode->vdisplay + timings->vfp;
49 mode->vsync_end = mode->vsync_start + timings->vsw;
50 mode->vtotal = mode->vsync_end + timings->vbp;
51
52 mode->flags = 0;
53
54 if (timings->interlace)
55 mode->flags |= DRM_MODE_FLAG_INTERLACE;
56
57 if (timings->hsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
58 mode->flags |= DRM_MODE_FLAG_PHSYNC;
59 else
60 mode->flags |= DRM_MODE_FLAG_NHSYNC;
61
62 if (timings->vsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
63 mode->flags |= DRM_MODE_FLAG_PVSYNC;
64 else
65 mode->flags |= DRM_MODE_FLAG_NVSYNC;
66 }
67
copy_timings_drm_to_omap(struct omap_video_timings * timings,struct drm_display_mode * mode)68 void copy_timings_drm_to_omap(struct omap_video_timings *timings,
69 struct drm_display_mode *mode)
70 {
71 timings->pixel_clock = mode->clock;
72
73 timings->x_res = mode->hdisplay;
74 timings->hfp = mode->hsync_start - mode->hdisplay;
75 timings->hsw = mode->hsync_end - mode->hsync_start;
76 timings->hbp = mode->htotal - mode->hsync_end;
77
78 timings->y_res = mode->vdisplay;
79 timings->vfp = mode->vsync_start - mode->vdisplay;
80 timings->vsw = mode->vsync_end - mode->vsync_start;
81 timings->vbp = mode->vtotal - mode->vsync_end;
82
83 timings->interlace = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
84
85 if (mode->flags & DRM_MODE_FLAG_PHSYNC)
86 timings->hsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
87 else
88 timings->hsync_level = OMAPDSS_SIG_ACTIVE_LOW;
89
90 if (mode->flags & DRM_MODE_FLAG_PVSYNC)
91 timings->vsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
92 else
93 timings->vsync_level = OMAPDSS_SIG_ACTIVE_LOW;
94
95 timings->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
96 timings->de_level = OMAPDSS_SIG_ACTIVE_HIGH;
97 timings->sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES;
98 }
99
omap_connector_detect(struct drm_connector * connector,bool force)100 static enum drm_connector_status omap_connector_detect(
101 struct drm_connector *connector, bool force)
102 {
103 struct omap_connector *omap_connector = to_omap_connector(connector);
104 struct omap_dss_device *dssdev = omap_connector->dssdev;
105 struct omap_dss_driver *dssdrv = dssdev->driver;
106 enum drm_connector_status ret;
107
108 if (dssdrv->detect) {
109 if (dssdrv->detect(dssdev))
110 ret = connector_status_connected;
111 else
112 ret = connector_status_disconnected;
113 } else if (dssdev->type == OMAP_DISPLAY_TYPE_DPI ||
114 dssdev->type == OMAP_DISPLAY_TYPE_DBI ||
115 dssdev->type == OMAP_DISPLAY_TYPE_SDI ||
116 dssdev->type == OMAP_DISPLAY_TYPE_DSI) {
117 ret = connector_status_connected;
118 } else {
119 ret = connector_status_unknown;
120 }
121
122 VERB("%s: %d (force=%d)", omap_connector->dssdev->name, ret, force);
123
124 return ret;
125 }
126
omap_connector_destroy(struct drm_connector * connector)127 static void omap_connector_destroy(struct drm_connector *connector)
128 {
129 struct omap_connector *omap_connector = to_omap_connector(connector);
130 struct omap_dss_device *dssdev = omap_connector->dssdev;
131
132 DBG("%s", omap_connector->dssdev->name);
133 drm_sysfs_connector_remove(connector);
134 drm_connector_cleanup(connector);
135 kfree(omap_connector);
136
137 omap_dss_put_device(dssdev);
138 }
139
140 #define MAX_EDID 512
141
omap_connector_get_modes(struct drm_connector * connector)142 static int omap_connector_get_modes(struct drm_connector *connector)
143 {
144 struct omap_connector *omap_connector = to_omap_connector(connector);
145 struct omap_dss_device *dssdev = omap_connector->dssdev;
146 struct omap_dss_driver *dssdrv = dssdev->driver;
147 struct drm_device *dev = connector->dev;
148 int n = 0;
149
150 DBG("%s", omap_connector->dssdev->name);
151
152 /* if display exposes EDID, then we parse that in the normal way to
153 * build table of supported modes.. otherwise (ie. fixed resolution
154 * LCD panels) we just return a single mode corresponding to the
155 * currently configured timings:
156 */
157 if (dssdrv->read_edid) {
158 void *edid = kzalloc(MAX_EDID, GFP_KERNEL);
159
160 if ((dssdrv->read_edid(dssdev, edid, MAX_EDID) > 0) &&
161 drm_edid_is_valid(edid)) {
162 drm_mode_connector_update_edid_property(
163 connector, edid);
164 n = drm_add_edid_modes(connector, edid);
165 } else {
166 drm_mode_connector_update_edid_property(
167 connector, NULL);
168 }
169 kfree(edid);
170 } else {
171 struct drm_display_mode *mode = drm_mode_create(dev);
172 struct omap_video_timings timings = {0};
173
174 dssdrv->get_timings(dssdev, &timings);
175
176 copy_timings_omap_to_drm(mode, &timings);
177
178 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
179 drm_mode_set_name(mode);
180 drm_mode_probed_add(connector, mode);
181
182 n = 1;
183 }
184
185 return n;
186 }
187
omap_connector_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)188 static int omap_connector_mode_valid(struct drm_connector *connector,
189 struct drm_display_mode *mode)
190 {
191 struct omap_connector *omap_connector = to_omap_connector(connector);
192 struct omap_dss_device *dssdev = omap_connector->dssdev;
193 struct omap_dss_driver *dssdrv = dssdev->driver;
194 struct omap_video_timings timings = {0};
195 struct drm_device *dev = connector->dev;
196 struct drm_display_mode *new_mode;
197 int r, ret = MODE_BAD;
198
199 copy_timings_drm_to_omap(&timings, mode);
200 mode->vrefresh = drm_mode_vrefresh(mode);
201
202 /*
203 * if the panel driver doesn't have a check_timings, it's most likely
204 * a fixed resolution panel, check if the timings match with the
205 * panel's timings
206 */
207 if (dssdrv->check_timings) {
208 r = dssdrv->check_timings(dssdev, &timings);
209 } else {
210 struct omap_video_timings t = {0};
211
212 dssdrv->get_timings(dssdev, &t);
213
214 if (memcmp(&timings, &t, sizeof(struct omap_video_timings)))
215 r = -EINVAL;
216 else
217 r = 0;
218 }
219
220 if (!r) {
221 /* check if vrefresh is still valid */
222 new_mode = drm_mode_duplicate(dev, mode);
223 new_mode->clock = timings.pixel_clock;
224 new_mode->vrefresh = 0;
225 if (mode->vrefresh == drm_mode_vrefresh(new_mode))
226 ret = MODE_OK;
227 drm_mode_destroy(dev, new_mode);
228 }
229
230 DBG("connector: mode %s: "
231 "%d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
232 (ret == MODE_OK) ? "valid" : "invalid",
233 mode->base.id, mode->name, mode->vrefresh, mode->clock,
234 mode->hdisplay, mode->hsync_start,
235 mode->hsync_end, mode->htotal,
236 mode->vdisplay, mode->vsync_start,
237 mode->vsync_end, mode->vtotal, mode->type, mode->flags);
238
239 return ret;
240 }
241
omap_connector_attached_encoder(struct drm_connector * connector)242 struct drm_encoder *omap_connector_attached_encoder(
243 struct drm_connector *connector)
244 {
245 struct omap_connector *omap_connector = to_omap_connector(connector);
246 return omap_connector->encoder;
247 }
248
249 static const struct drm_connector_funcs omap_connector_funcs = {
250 .dpms = drm_helper_connector_dpms,
251 .detect = omap_connector_detect,
252 .fill_modes = drm_helper_probe_single_connector_modes,
253 .destroy = omap_connector_destroy,
254 };
255
256 static const struct drm_connector_helper_funcs omap_connector_helper_funcs = {
257 .get_modes = omap_connector_get_modes,
258 .mode_valid = omap_connector_mode_valid,
259 .best_encoder = omap_connector_attached_encoder,
260 };
261
262 /* flush an area of the framebuffer (in case of manual update display that
263 * is not automatically flushed)
264 */
omap_connector_flush(struct drm_connector * connector,int x,int y,int w,int h)265 void omap_connector_flush(struct drm_connector *connector,
266 int x, int y, int w, int h)
267 {
268 struct omap_connector *omap_connector = to_omap_connector(connector);
269
270 /* TODO: enable when supported in dss */
271 VERB("%s: %d,%d, %dx%d", omap_connector->dssdev->name, x, y, w, h);
272 }
273
274 /* initialize connector */
omap_connector_init(struct drm_device * dev,int connector_type,struct omap_dss_device * dssdev,struct drm_encoder * encoder)275 struct drm_connector *omap_connector_init(struct drm_device *dev,
276 int connector_type, struct omap_dss_device *dssdev,
277 struct drm_encoder *encoder)
278 {
279 struct drm_connector *connector = NULL;
280 struct omap_connector *omap_connector;
281
282 DBG("%s", dssdev->name);
283
284 omap_dss_get_device(dssdev);
285
286 omap_connector = kzalloc(sizeof(struct omap_connector), GFP_KERNEL);
287 if (!omap_connector)
288 goto fail;
289
290 omap_connector->dssdev = dssdev;
291 omap_connector->encoder = encoder;
292
293 connector = &omap_connector->base;
294
295 drm_connector_init(dev, connector, &omap_connector_funcs,
296 connector_type);
297 drm_connector_helper_add(connector, &omap_connector_helper_funcs);
298
299 #if 0 /* enable when dss2 supports hotplug */
300 if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_HPD)
301 connector->polled = 0;
302 else
303 #endif
304 connector->polled = DRM_CONNECTOR_POLL_CONNECT |
305 DRM_CONNECTOR_POLL_DISCONNECT;
306
307 connector->interlace_allowed = 1;
308 connector->doublescan_allowed = 0;
309
310 drm_sysfs_connector_add(connector);
311
312 return connector;
313
314 fail:
315 if (connector)
316 omap_connector_destroy(connector);
317
318 return NULL;
319 }
320