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 <drm/drm_atomic_helper.h>
21 #include <drm/drm_crtc.h>
22 #include <drm/drm_crtc_helper.h>
23
24 #include "omap_drv.h"
25
26 /*
27 * connector funcs
28 */
29
30 #define to_omap_connector(x) container_of(x, struct omap_connector, base)
31
32 struct omap_connector {
33 struct drm_connector base;
34 struct omap_dss_device *dssdev;
35 bool hdmi_mode;
36 };
37
omap_connector_get_hdmi_mode(struct drm_connector * connector)38 bool omap_connector_get_hdmi_mode(struct drm_connector *connector)
39 {
40 struct omap_connector *omap_connector = to_omap_connector(connector);
41
42 return omap_connector->hdmi_mode;
43 }
44
copy_timings_omap_to_drm(struct drm_display_mode * mode,struct omap_video_timings * timings)45 void copy_timings_omap_to_drm(struct drm_display_mode *mode,
46 struct omap_video_timings *timings)
47 {
48 mode->clock = timings->pixelclock / 1000;
49
50 mode->hdisplay = timings->x_res;
51 mode->hsync_start = mode->hdisplay + timings->hfp;
52 mode->hsync_end = mode->hsync_start + timings->hsw;
53 mode->htotal = mode->hsync_end + timings->hbp;
54
55 mode->vdisplay = timings->y_res;
56 mode->vsync_start = mode->vdisplay + timings->vfp;
57 mode->vsync_end = mode->vsync_start + timings->vsw;
58 mode->vtotal = mode->vsync_end + timings->vbp;
59
60 mode->flags = 0;
61
62 if (timings->interlace)
63 mode->flags |= DRM_MODE_FLAG_INTERLACE;
64
65 if (timings->double_pixel)
66 mode->flags |= DRM_MODE_FLAG_DBLCLK;
67
68 if (timings->hsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
69 mode->flags |= DRM_MODE_FLAG_PHSYNC;
70 else
71 mode->flags |= DRM_MODE_FLAG_NHSYNC;
72
73 if (timings->vsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
74 mode->flags |= DRM_MODE_FLAG_PVSYNC;
75 else
76 mode->flags |= DRM_MODE_FLAG_NVSYNC;
77 }
78
copy_timings_drm_to_omap(struct omap_video_timings * timings,struct drm_display_mode * mode)79 void copy_timings_drm_to_omap(struct omap_video_timings *timings,
80 struct drm_display_mode *mode)
81 {
82 timings->pixelclock = mode->clock * 1000;
83
84 timings->x_res = mode->hdisplay;
85 timings->hfp = mode->hsync_start - mode->hdisplay;
86 timings->hsw = mode->hsync_end - mode->hsync_start;
87 timings->hbp = mode->htotal - mode->hsync_end;
88
89 timings->y_res = mode->vdisplay;
90 timings->vfp = mode->vsync_start - mode->vdisplay;
91 timings->vsw = mode->vsync_end - mode->vsync_start;
92 timings->vbp = mode->vtotal - mode->vsync_end;
93
94 timings->interlace = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
95 timings->double_pixel = !!(mode->flags & DRM_MODE_FLAG_DBLCLK);
96
97 if (mode->flags & DRM_MODE_FLAG_PHSYNC)
98 timings->hsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
99 else
100 timings->hsync_level = OMAPDSS_SIG_ACTIVE_LOW;
101
102 if (mode->flags & DRM_MODE_FLAG_PVSYNC)
103 timings->vsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
104 else
105 timings->vsync_level = OMAPDSS_SIG_ACTIVE_LOW;
106
107 timings->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
108 timings->de_level = OMAPDSS_SIG_ACTIVE_HIGH;
109 timings->sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
110 }
111
omap_connector_detect(struct drm_connector * connector,bool force)112 static enum drm_connector_status omap_connector_detect(
113 struct drm_connector *connector, bool force)
114 {
115 struct omap_connector *omap_connector = to_omap_connector(connector);
116 struct omap_dss_device *dssdev = omap_connector->dssdev;
117 struct omap_dss_driver *dssdrv = dssdev->driver;
118 enum drm_connector_status ret;
119
120 if (dssdrv->detect) {
121 if (dssdrv->detect(dssdev))
122 ret = connector_status_connected;
123 else
124 ret = connector_status_disconnected;
125 } else if (dssdev->type == OMAP_DISPLAY_TYPE_DPI ||
126 dssdev->type == OMAP_DISPLAY_TYPE_DBI ||
127 dssdev->type == OMAP_DISPLAY_TYPE_SDI ||
128 dssdev->type == OMAP_DISPLAY_TYPE_DSI) {
129 ret = connector_status_connected;
130 } else {
131 ret = connector_status_unknown;
132 }
133
134 VERB("%s: %d (force=%d)", omap_connector->dssdev->name, ret, force);
135
136 return ret;
137 }
138
omap_connector_destroy(struct drm_connector * connector)139 static void omap_connector_destroy(struct drm_connector *connector)
140 {
141 struct omap_connector *omap_connector = to_omap_connector(connector);
142 struct omap_dss_device *dssdev = omap_connector->dssdev;
143
144 DBG("%s", omap_connector->dssdev->name);
145 drm_connector_unregister(connector);
146 drm_connector_cleanup(connector);
147 kfree(omap_connector);
148
149 omap_dss_put_device(dssdev);
150 }
151
152 #define MAX_EDID 512
153
omap_connector_get_modes(struct drm_connector * connector)154 static int omap_connector_get_modes(struct drm_connector *connector)
155 {
156 struct omap_connector *omap_connector = to_omap_connector(connector);
157 struct omap_dss_device *dssdev = omap_connector->dssdev;
158 struct omap_dss_driver *dssdrv = dssdev->driver;
159 struct drm_device *dev = connector->dev;
160 int n = 0;
161
162 DBG("%s", omap_connector->dssdev->name);
163
164 /* if display exposes EDID, then we parse that in the normal way to
165 * build table of supported modes.. otherwise (ie. fixed resolution
166 * LCD panels) we just return a single mode corresponding to the
167 * currently configured timings:
168 */
169 if (dssdrv->read_edid) {
170 void *edid = kzalloc(MAX_EDID, GFP_KERNEL);
171
172 if ((dssdrv->read_edid(dssdev, edid, MAX_EDID) > 0) &&
173 drm_edid_is_valid(edid)) {
174 drm_mode_connector_update_edid_property(
175 connector, edid);
176 n = drm_add_edid_modes(connector, edid);
177
178 omap_connector->hdmi_mode =
179 drm_detect_hdmi_monitor(edid);
180 } else {
181 drm_mode_connector_update_edid_property(
182 connector, NULL);
183 }
184
185 kfree(edid);
186 } else {
187 struct drm_display_mode *mode = drm_mode_create(dev);
188 struct omap_video_timings timings = {0};
189
190 dssdrv->get_timings(dssdev, &timings);
191
192 copy_timings_omap_to_drm(mode, &timings);
193
194 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
195 drm_mode_set_name(mode);
196 drm_mode_probed_add(connector, mode);
197
198 n = 1;
199 }
200
201 return n;
202 }
203
omap_connector_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)204 static int omap_connector_mode_valid(struct drm_connector *connector,
205 struct drm_display_mode *mode)
206 {
207 struct omap_connector *omap_connector = to_omap_connector(connector);
208 struct omap_dss_device *dssdev = omap_connector->dssdev;
209 struct omap_dss_driver *dssdrv = dssdev->driver;
210 struct omap_video_timings timings = {0};
211 struct drm_device *dev = connector->dev;
212 struct drm_display_mode *new_mode;
213 int r, ret = MODE_BAD;
214
215 copy_timings_drm_to_omap(&timings, mode);
216 mode->vrefresh = drm_mode_vrefresh(mode);
217
218 /*
219 * if the panel driver doesn't have a check_timings, it's most likely
220 * a fixed resolution panel, check if the timings match with the
221 * panel's timings
222 */
223 if (dssdrv->check_timings) {
224 r = dssdrv->check_timings(dssdev, &timings);
225 } else {
226 struct omap_video_timings t = {0};
227
228 dssdrv->get_timings(dssdev, &t);
229
230 if (memcmp(&timings, &t, sizeof(struct omap_video_timings)))
231 r = -EINVAL;
232 else
233 r = 0;
234 }
235
236 if (!r) {
237 /* check if vrefresh is still valid */
238 new_mode = drm_mode_duplicate(dev, mode);
239 new_mode->clock = timings.pixelclock / 1000;
240 new_mode->vrefresh = 0;
241 if (mode->vrefresh == drm_mode_vrefresh(new_mode))
242 ret = MODE_OK;
243 drm_mode_destroy(dev, new_mode);
244 }
245
246 DBG("connector: mode %s: "
247 "%d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
248 (ret == MODE_OK) ? "valid" : "invalid",
249 mode->base.id, mode->name, mode->vrefresh, mode->clock,
250 mode->hdisplay, mode->hsync_start,
251 mode->hsync_end, mode->htotal,
252 mode->vdisplay, mode->vsync_start,
253 mode->vsync_end, mode->vtotal, mode->type, mode->flags);
254
255 return ret;
256 }
257
258 static const struct drm_connector_funcs omap_connector_funcs = {
259 .dpms = drm_atomic_helper_connector_dpms,
260 .reset = drm_atomic_helper_connector_reset,
261 .detect = omap_connector_detect,
262 .fill_modes = drm_helper_probe_single_connector_modes,
263 .destroy = omap_connector_destroy,
264 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
265 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
266 };
267
268 static const struct drm_connector_helper_funcs omap_connector_helper_funcs = {
269 .get_modes = omap_connector_get_modes,
270 .mode_valid = omap_connector_mode_valid,
271 };
272
273 /* initialize connector */
omap_connector_init(struct drm_device * dev,int connector_type,struct omap_dss_device * dssdev,struct drm_encoder * encoder)274 struct drm_connector *omap_connector_init(struct drm_device *dev,
275 int connector_type, struct omap_dss_device *dssdev,
276 struct drm_encoder *encoder)
277 {
278 struct drm_connector *connector = NULL;
279 struct omap_connector *omap_connector;
280
281 DBG("%s", dssdev->name);
282
283 omap_dss_get_device(dssdev);
284
285 omap_connector = kzalloc(sizeof(struct omap_connector), GFP_KERNEL);
286 if (!omap_connector)
287 goto fail;
288
289 omap_connector->dssdev = dssdev;
290
291 connector = &omap_connector->base;
292
293 drm_connector_init(dev, connector, &omap_connector_funcs,
294 connector_type);
295 drm_connector_helper_add(connector, &omap_connector_helper_funcs);
296
297 #if 0 /* enable when dss2 supports hotplug */
298 if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_HPD)
299 connector->polled = 0;
300 else
301 #endif
302 connector->polled = DRM_CONNECTOR_POLL_CONNECT |
303 DRM_CONNECTOR_POLL_DISCONNECT;
304
305 connector->interlace_allowed = 1;
306 connector->doublescan_allowed = 0;
307
308 drm_connector_register(connector);
309
310 return connector;
311
312 fail:
313 if (connector)
314 omap_connector_destroy(connector);
315
316 return NULL;
317 }
318