drivers/staging/omapdrm/omap_connector.c

   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         mode->flags = 0;
  52
  53         if (timings->interlace)
  54                 mode->flags |= DRM_MODE_FLAG_INTERLACE;
  55
  56         if (timings->hsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
  57                 mode->flags |= DRM_MODE_FLAG_PHSYNC;
  58         else
  59                 mode->flags |= DRM_MODE_FLAG_NHSYNC;
  60
  61         if (timings->vsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
  62                 mode->flags |= DRM_MODE_FLAG_PVSYNC;
  63         else
  64                 mode->flags |= DRM_MODE_FLAG_NVSYNC;
  65 }
  66
  67 static inline void copy_timings_drm_to_omap(struct omap_video_timings *timings,
  68                 struct drm_display_mode *mode)
  69 {
  70         timings->pixel_clock = mode->clock;
  71
  72         timings->x_res = mode->hdisplay;
  73         timings->hfp = mode->hsync_start - mode->hdisplay;
  74         timings->hsw = mode->hsync_end - mode->hsync_start;
  75         timings->hbp = mode->htotal - mode->hsync_end;
  76
  77         timings->y_res = mode->vdisplay;
  78         timings->vfp = mode->vsync_start - mode->vdisplay;
  79         timings->vsw = mode->vsync_end - mode->vsync_start;
  80         timings->vbp = mode->vtotal - mode->vsync_end;
  81
  82         timings->interlace = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
  83
  84         if (mode->flags & DRM_MODE_FLAG_PHSYNC)
  85                 timings->hsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
  86         else
  87                 timings->hsync_level = OMAPDSS_SIG_ACTIVE_LOW;
  88
  89         if (mode->flags & DRM_MODE_FLAG_PVSYNC)
  90                 timings->vsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
  91         else
  92                 timings->vsync_level = OMAPDSS_SIG_ACTIVE_LOW;
  93
  94         timings->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
  95         timings->de_level = OMAPDSS_SIG_ACTIVE_HIGH;
  96         timings->sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES;
  97 }
  98
  99 static void omap_connector_dpms(struct drm_connector *connector, int mode)
 100 {
 101         struct omap_connector *omap_connector = to_omap_connector(connector);
 102         struct omap_dss_device *dssdev = omap_connector->dssdev;
 103         int old_dpms;
 104
 105         DBG("%s: %d", dssdev->name, mode);
 106
 107         old_dpms = connector->dpms;
 108
 109         /* from off to on, do from crtc to connector */
 110         if (mode < old_dpms)
 111                 drm_helper_connector_dpms(connector, mode);
 112
 113         if (mode == DRM_MODE_DPMS_ON) {
 114                 /* store resume info for suspended displays */
 115                 switch (dssdev->state) {
 116                 case OMAP_DSS_DISPLAY_SUSPENDED:
 117                         dssdev->activate_after_resume = true;
 118                         break;
 119                 case OMAP_DSS_DISPLAY_DISABLED: {
 120                         int ret = dssdev->driver->enable(dssdev);
 121                         if (ret) {
 122                                 DBG("%s: failed to enable: %d",
 123                                                 dssdev->name, ret);
 124                                 dssdev->driver->disable(dssdev);
 125                         }
 126                         break;
 127                 }
 128                 default:
 129                         break;
 130                 }
 131         } else {
 132                 /* TODO */
 133         }
 134
 135         /* from on to off, do from connector to crtc */
 136         if (mode > old_dpms)
 137                 drm_helper_connector_dpms(connector, mode);
 138 }
 139
 140 enum drm_connector_status omap_connector_detect(
 141                 struct drm_connector *connector, bool force)
 142 {
 143         struct omap_connector *omap_connector = to_omap_connector(connector);
 144         struct omap_dss_device *dssdev = omap_connector->dssdev;
 145         struct omap_dss_driver *dssdrv = dssdev->driver;
 146         enum drm_connector_status ret;
 147
 148         if (dssdrv->detect) {
 149                 if (dssdrv->detect(dssdev))
 150                         ret = connector_status_connected;
 151                 else
 152                         ret = connector_status_disconnected;
 153         } else {
 154                 ret = connector_status_unknown;
 155         }
 156
 157         VERB("%s: %d (force=%d)", omap_connector->dssdev->name, ret, force);
 158
 159         return ret;
 160 }
 161
 162 static void omap_connector_destroy(struct drm_connector *connector)
 163 {
 164         struct omap_connector *omap_connector = to_omap_connector(connector);
 165         struct omap_dss_device *dssdev = omap_connector->dssdev;
 166
 167         dssdev->driver->disable(dssdev);
 168
 169         DBG("%s", omap_connector->dssdev->name);
 170         drm_sysfs_connector_remove(connector);
 171         drm_connector_cleanup(connector);
 172         kfree(omap_connector);
 173
 174         omap_dss_put_device(dssdev);
 175 }
 176
 177 #define MAX_EDID  512
 178
 179 static int omap_connector_get_modes(struct drm_connector *connector)
 180 {
 181         struct omap_connector *omap_connector = to_omap_connector(connector);
 182         struct omap_dss_device *dssdev = omap_connector->dssdev;
 183         struct omap_dss_driver *dssdrv = dssdev->driver;
 184         struct drm_device *dev = connector->dev;
 185         int n = 0;
 186
 187         DBG("%s", omap_connector->dssdev->name);
 188
 189         /* if display exposes EDID, then we parse that in the normal way to
 190          * build table of supported modes.. otherwise (ie. fixed resolution
 191          * LCD panels) we just return a single mode corresponding to the
 192          * currently configured timings:
 193          */
 194         if (dssdrv->read_edid) {
 195                 void *edid = kzalloc(MAX_EDID, GFP_KERNEL);
 196
 197                 if ((dssdrv->read_edid(dssdev, edid, MAX_EDID) > 0) &&
 198                                 drm_edid_is_valid(edid)) {
 199                         drm_mode_connector_update_edid_property(
 200                                         connector, edid);
 201                         n = drm_add_edid_modes(connector, edid);
 202                 } else {
 203                         drm_mode_connector_update_edid_property(
 204                                         connector, NULL);
 205                 }
 206                 kfree(edid);
 207         } else {
 208                 struct drm_display_mode *mode = drm_mode_create(dev);
 209                 struct omap_video_timings timings = {0};
 210
 211                 dssdrv->get_timings(dssdev, &timings);
 212
 213                 copy_timings_omap_to_drm(mode, &timings);
 214
 215                 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
 216                 drm_mode_set_name(mode);
 217                 drm_mode_probed_add(connector, mode);
 218
 219                 n = 1;
 220         }
 221
 222         return n;
 223 }
 224
 225 static int omap_connector_mode_valid(struct drm_connector *connector,
 226                                  struct drm_display_mode *mode)
 227 {
 228         struct omap_connector *omap_connector = to_omap_connector(connector);
 229         struct omap_dss_device *dssdev = omap_connector->dssdev;
 230         struct omap_dss_driver *dssdrv = dssdev->driver;
 231         struct omap_video_timings timings = {0};
 232         struct drm_device *dev = connector->dev;
 233         struct drm_display_mode *new_mode;
 234         int ret = MODE_BAD;
 235
 236         copy_timings_drm_to_omap(&timings, mode);
 237         mode->vrefresh = drm_mode_vrefresh(mode);
 238
 239         if (!dssdrv->check_timings(dssdev, &timings)) {
 240                 /* check if vrefresh is still valid */
 241                 new_mode = drm_mode_duplicate(dev, mode);
 242                 new_mode->clock = timings.pixel_clock;
 243                 new_mode->vrefresh = 0;
 244                 if (mode->vrefresh == drm_mode_vrefresh(new_mode))
 245                         ret = MODE_OK;
 246                 drm_mode_destroy(dev, new_mode);
 247         }
 248
 249         DBG("connector: mode %s: "
 250                         "%d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
 251                         (ret == MODE_OK) ? "valid" : "invalid",
 252                         mode->base.id, mode->name, mode->vrefresh, mode->clock,
 253                         mode->hdisplay, mode->hsync_start,
 254                         mode->hsync_end, mode->htotal,
 255                         mode->vdisplay, mode->vsync_start,
 256                         mode->vsync_end, mode->vtotal, mode->type, mode->flags);
 257
 258         return ret;
 259 }
 260
 261 struct drm_encoder *omap_connector_attached_encoder(
 262                 struct drm_connector *connector)
 263 {
 264         int i;
 265         struct omap_connector *omap_connector = to_omap_connector(connector);
 266
 267         for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
 268                 struct drm_mode_object *obj;
 269
 270                 if (connector->encoder_ids[i] == 0)
 271                         break;
 272
 273                 obj = drm_mode_object_find(connector->dev,
 274                                 connector->encoder_ids[i],
 275                                 DRM_MODE_OBJECT_ENCODER);
 276
 277                 if (obj) {
 278                         struct drm_encoder *encoder = obj_to_encoder(obj);
 279                         struct omap_overlay_manager *mgr =
 280                                         omap_encoder_get_manager(encoder);
 281                         DBG("%s: found %s", omap_connector->dssdev->name,
 282                                         mgr->name);
 283                         return encoder;
 284                 }
 285         }
 286
 287         DBG("%s: no encoder", omap_connector->dssdev->name);
 288
 289         return NULL;
 290 }
 291
 292 static const struct drm_connector_funcs omap_connector_funcs = {
 293         .dpms = omap_connector_dpms,
 294         .detect = omap_connector_detect,
 295         .fill_modes = drm_helper_probe_single_connector_modes,
 296         .destroy = omap_connector_destroy,
 297 };
 298
 299 static const struct drm_connector_helper_funcs omap_connector_helper_funcs = {
 300         .get_modes = omap_connector_get_modes,
 301         .mode_valid = omap_connector_mode_valid,
 302         .best_encoder = omap_connector_attached_encoder,
 303 };
 304
 305 /* called from encoder when mode is set, to propagate settings to the dssdev */
 306 void omap_connector_mode_set(struct drm_connector *connector,
 307                 struct drm_display_mode *mode)
 308 {
 309         struct drm_device *dev = connector->dev;
 310         struct omap_connector *omap_connector = to_omap_connector(connector);
 311         struct omap_dss_device *dssdev = omap_connector->dssdev;
 312         struct omap_dss_driver *dssdrv = dssdev->driver;
 313         struct omap_video_timings timings = {0};
 314
 315         copy_timings_drm_to_omap(&timings, mode);
 316
 317         DBG("%s: set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
 318                         omap_connector->dssdev->name,
 319                         mode->base.id, mode->name, mode->vrefresh, mode->clock,
 320                         mode->hdisplay, mode->hsync_start,
 321                         mode->hsync_end, mode->htotal,
 322                         mode->vdisplay, mode->vsync_start,
 323                         mode->vsync_end, mode->vtotal, mode->type, mode->flags);
 324
 325         if (dssdrv->check_timings(dssdev, &timings)) {
 326                 dev_err(dev->dev, "could not set timings\n");
 327                 return;
 328         }
 329
 330         dssdrv->set_timings(dssdev, &timings);
 331 }
 332
 333 /* flush an area of the framebuffer (in case of manual update display that
 334  * is not automatically flushed)
 335  */
 336 void omap_connector_flush(struct drm_connector *connector,
 337                 int x, int y, int w, int h)
 338 {
 339         struct omap_connector *omap_connector = to_omap_connector(connector);
 340
 341         /* TODO: enable when supported in dss */
 342         VERB("%s: %d,%d, %dx%d", omap_connector->dssdev->name, x, y, w, h);
 343 }
 344
 345 /* initialize connector */
 346 struct drm_connector *omap_connector_init(struct drm_device *dev,
 347                 int connector_type, struct omap_dss_device *dssdev)
 348 {
 349         struct drm_connector *connector = NULL;
 350         struct omap_connector *omap_connector;
 351
 352         DBG("%s", dssdev->name);
 353
 354         omap_dss_get_device(dssdev);
 355
 356         omap_connector = kzalloc(sizeof(struct omap_connector), GFP_KERNEL);
 357         if (!omap_connector) {
 358                 dev_err(dev->dev, "could not allocate connector\n");
 359                 goto fail;
 360         }
 361
 362         omap_connector->dssdev = dssdev;
 363         connector = &omap_connector->base;
 364
 365         drm_connector_init(dev, connector, &omap_connector_funcs,
 366                                 connector_type);
 367         drm_connector_helper_add(connector, &omap_connector_helper_funcs);
 368
 369 #if 0 /* enable when dss2 supports hotplug */
 370         if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_HPD)
 371                 connector->polled = 0;
 372         else
 373 #endif
 374                 connector->polled = DRM_CONNECTOR_POLL_CONNECT |
 375                                 DRM_CONNECTOR_POLL_DISCONNECT;
 376
 377         connector->interlace_allowed = 1;
 378         connector->doublescan_allowed = 0;
 379
 380         drm_sysfs_connector_add(connector);
 381
 382         return connector;
 383
 384 fail:
 385         if (connector)
 386                 omap_connector_destroy(connector);
 387
 388         return NULL;
 389 }