2 * drivers/gpu/drm/omapdrm/omap_connector.c
4 * Copyright (C) 2011 Texas Instruments
5 * Author: Rob Clark <rob@ti.com>
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.
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
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/>.
20 #include <drm/drm_atomic_helper.h>
21 #include <drm/drm_crtc.h>
22 #include <drm/drm_crtc_helper.h>
30 #define to_omap_connector(x) container_of(x, struct omap_connector, base)
32 struct omap_connector {
33 struct drm_connector base;
34 struct omap_dss_device *dssdev;
38 bool omap_connector_get_hdmi_mode(struct drm_connector *connector)
40 struct omap_connector *omap_connector = to_omap_connector(connector);
42 return omap_connector->hdmi_mode;
45 void copy_timings_omap_to_drm(struct drm_display_mode *mode,
46 struct omap_video_timings *timings)
48 mode->clock = timings->pixelclock / 1000;
50 mode->hdisplay = timings->hactive;
51 mode->hsync_start = mode->hdisplay + timings->hfront_porch;
52 mode->hsync_end = mode->hsync_start + timings->hsync_len;
53 mode->htotal = mode->hsync_end + timings->hback_porch;
55 mode->vdisplay = timings->vactive;
56 mode->vsync_start = mode->vdisplay + timings->vfront_porch;
57 mode->vsync_end = mode->vsync_start + timings->vsync_len;
58 mode->vtotal = mode->vsync_end + timings->vback_porch;
62 if (timings->flags & DISPLAY_FLAGS_INTERLACED)
63 mode->flags |= DRM_MODE_FLAG_INTERLACE;
65 if (timings->flags & DISPLAY_FLAGS_DOUBLECLK)
66 mode->flags |= DRM_MODE_FLAG_DBLCLK;
68 if (timings->flags & DISPLAY_FLAGS_HSYNC_HIGH)
69 mode->flags |= DRM_MODE_FLAG_PHSYNC;
71 mode->flags |= DRM_MODE_FLAG_NHSYNC;
73 if (timings->flags & DISPLAY_FLAGS_VSYNC_HIGH)
74 mode->flags |= DRM_MODE_FLAG_PVSYNC;
76 mode->flags |= DRM_MODE_FLAG_NVSYNC;
79 void copy_timings_drm_to_omap(struct omap_video_timings *timings,
80 struct drm_display_mode *mode)
82 timings->pixelclock = mode->clock * 1000;
84 timings->hactive = mode->hdisplay;
85 timings->hfront_porch = mode->hsync_start - mode->hdisplay;
86 timings->hsync_len = mode->hsync_end - mode->hsync_start;
87 timings->hback_porch = mode->htotal - mode->hsync_end;
89 timings->vactive = mode->vdisplay;
90 timings->vfront_porch = mode->vsync_start - mode->vdisplay;
91 timings->vsync_len = mode->vsync_end - mode->vsync_start;
92 timings->vback_porch = mode->vtotal - mode->vsync_end;
94 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
95 timings->flags |= DISPLAY_FLAGS_INTERLACED;
97 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
98 timings->flags |= DISPLAY_FLAGS_DOUBLECLK;
100 if (mode->flags & DRM_MODE_FLAG_PHSYNC)
101 timings->flags |= DISPLAY_FLAGS_HSYNC_HIGH;
103 timings->flags |= DISPLAY_FLAGS_HSYNC_LOW;
105 if (mode->flags & DRM_MODE_FLAG_PVSYNC)
106 timings->flags |= DISPLAY_FLAGS_VSYNC_HIGH;
108 timings->flags |= DISPLAY_FLAGS_VSYNC_LOW;
110 timings->flags |= DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_PIXDATA_POSEDGE;
111 timings->sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
114 static enum drm_connector_status omap_connector_detect(
115 struct drm_connector *connector, bool force)
117 struct omap_connector *omap_connector = to_omap_connector(connector);
118 struct omap_dss_device *dssdev = omap_connector->dssdev;
119 struct omap_dss_driver *dssdrv = dssdev->driver;
120 enum drm_connector_status ret;
122 if (dssdrv->detect) {
123 if (dssdrv->detect(dssdev))
124 ret = connector_status_connected;
126 ret = connector_status_disconnected;
127 } else if (dssdev->type == OMAP_DISPLAY_TYPE_DPI ||
128 dssdev->type == OMAP_DISPLAY_TYPE_DBI ||
129 dssdev->type == OMAP_DISPLAY_TYPE_SDI ||
130 dssdev->type == OMAP_DISPLAY_TYPE_DSI) {
131 ret = connector_status_connected;
133 ret = connector_status_unknown;
136 VERB("%s: %d (force=%d)", omap_connector->dssdev->name, ret, force);
141 static void omap_connector_destroy(struct drm_connector *connector)
143 struct omap_connector *omap_connector = to_omap_connector(connector);
144 struct omap_dss_device *dssdev = omap_connector->dssdev;
146 DBG("%s", omap_connector->dssdev->name);
147 drm_connector_unregister(connector);
148 drm_connector_cleanup(connector);
149 kfree(omap_connector);
151 omap_dss_put_device(dssdev);
156 static int omap_connector_get_modes(struct drm_connector *connector)
158 struct omap_connector *omap_connector = to_omap_connector(connector);
159 struct omap_dss_device *dssdev = omap_connector->dssdev;
160 struct omap_dss_driver *dssdrv = dssdev->driver;
161 struct drm_device *dev = connector->dev;
164 DBG("%s", omap_connector->dssdev->name);
166 /* if display exposes EDID, then we parse that in the normal way to
167 * build table of supported modes.. otherwise (ie. fixed resolution
168 * LCD panels) we just return a single mode corresponding to the
169 * currently configured timings:
171 if (dssdrv->read_edid) {
172 void *edid = kzalloc(MAX_EDID, GFP_KERNEL);
174 if ((dssdrv->read_edid(dssdev, edid, MAX_EDID) > 0) &&
175 drm_edid_is_valid(edid)) {
176 drm_mode_connector_update_edid_property(
178 n = drm_add_edid_modes(connector, edid);
180 omap_connector->hdmi_mode =
181 drm_detect_hdmi_monitor(edid);
183 drm_mode_connector_update_edid_property(
189 struct drm_display_mode *mode = drm_mode_create(dev);
190 struct omap_video_timings timings = {0};
192 dssdrv->get_timings(dssdev, &timings);
194 copy_timings_omap_to_drm(mode, &timings);
196 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
197 drm_mode_set_name(mode);
198 drm_mode_probed_add(connector, mode);
206 static int omap_connector_mode_valid(struct drm_connector *connector,
207 struct drm_display_mode *mode)
209 struct omap_connector *omap_connector = to_omap_connector(connector);
210 struct omap_dss_device *dssdev = omap_connector->dssdev;
211 struct omap_dss_driver *dssdrv = dssdev->driver;
212 struct omap_video_timings timings = {0};
213 struct drm_device *dev = connector->dev;
214 struct drm_display_mode *new_mode;
215 int r, ret = MODE_BAD;
217 copy_timings_drm_to_omap(&timings, mode);
218 mode->vrefresh = drm_mode_vrefresh(mode);
221 * if the panel driver doesn't have a check_timings, it's most likely
222 * a fixed resolution panel, check if the timings match with the
225 if (dssdrv->check_timings) {
226 r = dssdrv->check_timings(dssdev, &timings);
228 struct omap_video_timings t = {0};
230 dssdrv->get_timings(dssdev, &t);
232 if (memcmp(&timings, &t, sizeof(struct omap_video_timings)))
239 /* check if vrefresh is still valid */
240 new_mode = drm_mode_duplicate(dev, mode);
241 new_mode->clock = timings.pixelclock / 1000;
242 new_mode->vrefresh = 0;
243 if (mode->vrefresh == drm_mode_vrefresh(new_mode))
245 drm_mode_destroy(dev, new_mode);
248 DBG("connector: mode %s: "
249 "%d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
250 (ret == MODE_OK) ? "valid" : "invalid",
251 mode->base.id, mode->name, mode->vrefresh, mode->clock,
252 mode->hdisplay, mode->hsync_start,
253 mode->hsync_end, mode->htotal,
254 mode->vdisplay, mode->vsync_start,
255 mode->vsync_end, mode->vtotal, mode->type, mode->flags);
260 static const struct drm_connector_funcs omap_connector_funcs = {
261 .dpms = drm_atomic_helper_connector_dpms,
262 .reset = drm_atomic_helper_connector_reset,
263 .detect = omap_connector_detect,
264 .fill_modes = drm_helper_probe_single_connector_modes,
265 .destroy = omap_connector_destroy,
266 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
267 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
270 static const struct drm_connector_helper_funcs omap_connector_helper_funcs = {
271 .get_modes = omap_connector_get_modes,
272 .mode_valid = omap_connector_mode_valid,
275 /* initialize connector */
276 struct drm_connector *omap_connector_init(struct drm_device *dev,
277 int connector_type, struct omap_dss_device *dssdev,
278 struct drm_encoder *encoder)
280 struct drm_connector *connector = NULL;
281 struct omap_connector *omap_connector;
283 DBG("%s", dssdev->name);
285 omap_dss_get_device(dssdev);
287 omap_connector = kzalloc(sizeof(struct omap_connector), GFP_KERNEL);
291 omap_connector->dssdev = dssdev;
293 connector = &omap_connector->base;
295 drm_connector_init(dev, connector, &omap_connector_funcs,
297 drm_connector_helper_add(connector, &omap_connector_helper_funcs);
299 #if 0 /* enable when dss2 supports hotplug */
300 if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_HPD)
301 connector->polled = 0;
304 connector->polled = DRM_CONNECTOR_POLL_CONNECT |
305 DRM_CONNECTOR_POLL_DISCONNECT;
307 connector->interlace_allowed = 1;
308 connector->doublescan_allowed = 0;
310 drm_connector_register(connector);
316 omap_connector_destroy(connector);