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 */
20 #include "omap_drv.h"
22 #include "drm_crtc.h"
23 #include "drm_crtc_helper.h"
25 #define OMAP_DRM_MODE_FLAG_DATA_RISING (1 << 24)
26 #define OMAP_DRM_MODE_FLAG_DATA_FALLING (1 << 25)
27 #define OMAP_DRM_MODE_FLAG_SYNC_RISING (1 << 26)
28 #define OMAP_DRM_MODE_FLAG_SYNC_FALLING (1 << 27)
29 #define OMAP_DRM_MODE_FLAG_PDE (1 << 28)
30 #define OMAP_DRM_MODE_FLAG_NDE (1 << 29)
32 /*
33 * connector funcs
34 */
36 #define to_omap_connector(x) container_of(x, struct omap_connector, base)
38 struct omap_connector {
39 struct drm_connector base;
40 struct omap_dss_device *dssdev;
41 struct drm_encoder *encoder;
42 bool hdmi_mode;
43 };
45 bool omap_connector_get_hdmi_mode(struct drm_connector *connector)
46 {
47 struct omap_connector *omap_connector = to_omap_connector(connector);
49 return omap_connector->hdmi_mode;
50 }
52 void copy_timings_omap_to_drm(struct drm_display_mode *mode,
53 struct omap_video_timings *timings)
54 {
55 mode->clock = timings->pixelclock / 1000;
57 mode->hdisplay = timings->x_res;
58 mode->hsync_start = mode->hdisplay + timings->hfp;
59 mode->hsync_end = mode->hsync_start + timings->hsw;
60 mode->htotal = mode->hsync_end + timings->hbp;
62 mode->vdisplay = timings->y_res;
63 mode->vsync_start = mode->vdisplay + timings->vfp;
64 mode->vsync_end = mode->vsync_start + timings->vsw;
65 mode->vtotal = mode->vsync_end + timings->vbp;
67 mode->flags = 0;
69 if (timings->interlace)
70 mode->flags |= DRM_MODE_FLAG_INTERLACE;
72 if (timings->hsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
73 mode->flags |= DRM_MODE_FLAG_PHSYNC;
74 else
75 mode->flags |= DRM_MODE_FLAG_NHSYNC;
77 if (timings->vsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
78 mode->flags |= DRM_MODE_FLAG_PVSYNC;
79 else
80 mode->flags |= DRM_MODE_FLAG_NVSYNC;
82 if (timings->data_pclk_edge == OMAPDSS_DRIVE_SIG_RISING_EDGE)
83 mode->flags |= OMAP_DRM_MODE_FLAG_DATA_RISING;
84 else
85 mode->flags |= OMAP_DRM_MODE_FLAG_DATA_FALLING;
87 if (timings->sync_pclk_edge == OMAPDSS_DRIVE_SIG_RISING_EDGE)
88 mode->flags |= OMAP_DRM_MODE_FLAG_SYNC_RISING;
89 else
90 mode->flags |= OMAP_DRM_MODE_FLAG_SYNC_FALLING;
92 if (timings->de_level == OMAPDSS_SIG_ACTIVE_HIGH)
93 mode->flags |= OMAP_DRM_MODE_FLAG_PDE;
94 else
95 mode->flags |= OMAP_DRM_MODE_FLAG_NDE;
96 }
98 void copy_timings_drm_to_omap(struct omap_video_timings *timings,
99 struct drm_display_mode *mode)
100 {
101 timings->pixelclock = mode->clock * 1000;
103 timings->x_res = mode->hdisplay;
104 timings->hfp = mode->hsync_start - mode->hdisplay;
105 timings->hsw = mode->hsync_end - mode->hsync_start;
106 timings->hbp = mode->htotal - mode->hsync_end;
108 timings->y_res = mode->vdisplay;
109 timings->vfp = mode->vsync_start - mode->vdisplay;
110 timings->vsw = mode->vsync_end - mode->vsync_start;
111 timings->vbp = mode->vtotal - mode->vsync_end;
113 timings->interlace = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
115 if (mode->flags & DRM_MODE_FLAG_PHSYNC)
116 timings->hsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
117 else
118 timings->hsync_level = OMAPDSS_SIG_ACTIVE_LOW;
120 if (mode->flags & DRM_MODE_FLAG_PVSYNC)
121 timings->vsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
122 else
123 timings->vsync_level = OMAPDSS_SIG_ACTIVE_LOW;
125 if (mode->flags & OMAP_DRM_MODE_FLAG_DATA_RISING)
126 timings->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
127 else
128 timings->data_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
130 if (mode->flags & OMAP_DRM_MODE_FLAG_SYNC_RISING)
131 timings->de_level = OMAPDSS_SIG_ACTIVE_HIGH;
132 else
133 timings->de_level = OMAPDSS_SIG_ACTIVE_LOW;
135 if (mode->flags & OMAP_DRM_MODE_FLAG_PDE)
136 timings->sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
137 else
138 timings->sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
139 }
141 static enum drm_connector_status omap_connector_detect(
142 struct drm_connector *connector, bool force)
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 enum drm_connector_status ret;
149 if (dssdrv->detect) {
150 if (dssdrv->detect(dssdev))
151 ret = connector_status_connected;
152 else
153 ret = connector_status_disconnected;
154 } else if (dssdev->type == OMAP_DISPLAY_TYPE_DPI ||
155 dssdev->type == OMAP_DISPLAY_TYPE_DBI ||
156 dssdev->type == OMAP_DISPLAY_TYPE_SDI ||
157 dssdev->type == OMAP_DISPLAY_TYPE_DSI) {
158 ret = connector_status_connected;
159 } else {
160 ret = connector_status_unknown;
161 }
163 VERB("%s: %d (force=%d)", omap_connector->dssdev->name, ret, force);
165 return ret;
166 }
168 static void omap_connector_destroy(struct drm_connector *connector)
169 {
170 struct omap_connector *omap_connector = to_omap_connector(connector);
171 struct omap_dss_device *dssdev = omap_connector->dssdev;
173 DBG("%s", omap_connector->dssdev->name);
174 drm_sysfs_connector_remove(connector);
175 drm_connector_cleanup(connector);
176 kfree(omap_connector);
178 omap_dss_put_device(dssdev);
179 }
181 #define MAX_EDID 512
183 static int omap_connector_get_modes(struct drm_connector *connector)
184 {
185 struct omap_connector *omap_connector = to_omap_connector(connector);
186 struct omap_dss_device *dssdev = omap_connector->dssdev;
187 struct omap_dss_driver *dssdrv = dssdev->driver;
188 struct drm_device *dev = connector->dev;
189 int n = 0;
191 DBG("%s", omap_connector->dssdev->name);
193 /* if display exposes EDID, then we parse that in the normal way to
194 * build table of supported modes.. otherwise (ie. fixed resolution
195 * LCD panels) we just return a single mode corresponding to the
196 * currently configured timings:
197 */
198 if (dssdrv->read_edid) {
199 void *edid = kzalloc(MAX_EDID, GFP_KERNEL);
201 if ((dssdrv->read_edid(dssdev, edid, MAX_EDID) > 0) &&
202 drm_edid_is_valid(edid)) {
203 drm_mode_connector_update_edid_property(
204 connector, edid);
205 n = drm_add_edid_modes(connector, edid);
207 omap_connector->hdmi_mode =
208 drm_detect_hdmi_monitor(edid);
209 } else {
210 drm_mode_connector_update_edid_property(
211 connector, NULL);
212 }
214 kfree(edid);
215 } else {
216 struct drm_display_mode *mode = drm_mode_create(dev);
217 struct omap_video_timings timings = {0};
219 dssdrv->get_timings(dssdev, &timings);
221 copy_timings_omap_to_drm(mode, &timings);
223 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
224 drm_mode_set_name(mode);
225 drm_mode_probed_add(connector, mode);
227 n = 1;
228 }
230 return n;
231 }
233 static int omap_connector_mode_valid(struct drm_connector *connector,
234 struct drm_display_mode *mode)
235 {
236 struct omap_connector *omap_connector = to_omap_connector(connector);
237 struct omap_dss_device *dssdev = omap_connector->dssdev;
238 struct omap_dss_driver *dssdrv = dssdev->driver;
239 struct omap_video_timings timings = {0};
240 struct drm_device *dev = connector->dev;
241 struct drm_display_mode *new_mode;
242 int r, ret = MODE_BAD;
244 copy_timings_drm_to_omap(&timings, mode);
245 mode->vrefresh = drm_mode_vrefresh(mode);
247 /*
248 * if the panel driver doesn't have a check_timings, it's most likely
249 * a fixed resolution panel, check if the timings match with the
250 * panel's timings
251 */
252 if (dssdrv->check_timings) {
253 r = dssdrv->check_timings(dssdev, &timings);
254 } else {
255 struct omap_video_timings t = {0};
257 dssdrv->get_timings(dssdev, &t);
259 if (memcmp(&timings, &t, sizeof(struct omap_video_timings)))
260 r = -EINVAL;
261 else
262 r = 0;
263 }
265 if (!r) {
266 /* check if vrefresh is still valid */
267 new_mode = drm_mode_duplicate(dev, mode);
268 new_mode->clock = timings.pixelclock / 1000;
269 new_mode->vrefresh = 0;
270 if (mode->vrefresh == drm_mode_vrefresh(new_mode))
271 ret = MODE_OK;
272 drm_mode_destroy(dev, new_mode);
273 }
275 DBG("connector: mode %s: "
276 "%d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
277 (ret == MODE_OK) ? "valid" : "invalid",
278 mode->base.id, mode->name, mode->vrefresh, mode->clock,
279 mode->hdisplay, mode->hsync_start,
280 mode->hsync_end, mode->htotal,
281 mode->vdisplay, mode->vsync_start,
282 mode->vsync_end, mode->vtotal, mode->type, mode->flags);
284 return ret;
285 }
287 struct drm_encoder *omap_connector_attached_encoder(
288 struct drm_connector *connector)
289 {
290 struct omap_connector *omap_connector = to_omap_connector(connector);
291 return omap_connector->encoder;
292 }
294 static const struct drm_connector_funcs omap_connector_funcs = {
295 .dpms = drm_helper_connector_dpms,
296 .detect = omap_connector_detect,
297 .fill_modes = drm_helper_probe_single_connector_modes,
298 .destroy = omap_connector_destroy,
299 };
301 static const struct drm_connector_helper_funcs omap_connector_helper_funcs = {
302 .get_modes = omap_connector_get_modes,
303 .mode_valid = omap_connector_mode_valid,
304 .best_encoder = omap_connector_attached_encoder,
305 };
307 /* flush an area of the framebuffer (in case of manual update display that
308 * is not automatically flushed)
309 */
310 void omap_connector_flush(struct drm_connector *connector,
311 int x, int y, int w, int h)
312 {
313 struct omap_connector *omap_connector = to_omap_connector(connector);
315 /* TODO: enable when supported in dss */
316 VERB("%s: %d,%d, %dx%d", omap_connector->dssdev->name, x, y, w, h);
317 }
319 /* initialize connector */
320 struct drm_connector *omap_connector_init(struct drm_device *dev,
321 int connector_type, struct omap_dss_device *dssdev,
322 struct drm_encoder *encoder)
323 {
324 struct drm_connector *connector = NULL;
325 struct omap_connector *omap_connector;
327 DBG("%s", dssdev->name);
329 omap_dss_get_device(dssdev);
331 omap_connector = kzalloc(sizeof(struct omap_connector), GFP_KERNEL);
332 if (!omap_connector)
333 goto fail;
335 omap_connector->dssdev = dssdev;
336 omap_connector->encoder = encoder;
338 connector = &omap_connector->base;
340 drm_connector_init(dev, connector, &omap_connector_funcs,
341 connector_type);
342 drm_connector_helper_add(connector, &omap_connector_helper_funcs);
344 #if 0 /* enable when dss2 supports hotplug */
345 if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_HPD)
346 connector->polled = 0;
347 else
348 #endif
349 connector->polled = DRM_CONNECTOR_POLL_CONNECT |
350 DRM_CONNECTOR_POLL_DISCONNECT;
352 connector->interlace_allowed = 1;
353 connector->doublescan_allowed = 0;
355 drm_sysfs_connector_add(connector);
357 return connector;
359 fail:
360 if (connector)
361 omap_connector_destroy(connector);
363 return NULL;
364 }