drivers/gpu/drm/omapdrm/omap_connector.c

   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 #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)
  31
  32 /*
  33  * connector funcs
  34  */
  35
  36 #define to_omap_connector(x) container_of(x, struct omap_connector, base)
  37
  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 };
  44
  45 bool omap_connector_get_hdmi_mode(struct drm_connector *connector)
  46 {
  47         struct omap_connector *omap_connector = to_omap_connector(connector);
  48
  49         return omap_connector->hdmi_mode;
  50 }
  51
  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;
  56
  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;
  61
  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;
  66
  67         mode->flags = 0;
  68
  69         if (timings->interlace)
  70                 mode->flags |= DRM_MODE_FLAG_INTERLACE;
  71
  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;
  76
  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;
  81
  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;
  86
  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;
  91
  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 }
  97
  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;
 102
 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;
 107
 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;
 112
 113         timings->interlace = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
 114
 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;
 119
 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;
 124
 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;
 129
 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;
 134
 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 }
 140
 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;
 148
 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         }
 162
 163         VERB("%s: %d (force=%d)", omap_connector->dssdev->name, ret, force);
 164
 165         return ret;
 166 }
 167
 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;
 172
 173         DBG("%s", omap_connector->dssdev->name);
 174         drm_sysfs_connector_remove(connector);
 175         drm_connector_cleanup(connector);
 176         kfree(omap_connector);
 177
 178         omap_dss_put_device(dssdev);
 179 }
 180
 181 #define MAX_EDID  512
 182
 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;
 190
 191         DBG("%s", omap_connector->dssdev->name);
 192
 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);
 200
 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);
 206
 207                         omap_connector->hdmi_mode =
 208                                 drm_detect_hdmi_monitor(edid);
 209                 } else {
 210                         drm_mode_connector_update_edid_property(
 211                                         connector, NULL);
 212                 }
 213
 214                 kfree(edid);
 215         } else {
 216                 struct drm_display_mode *mode = drm_mode_create(dev);
 217                 struct omap_video_timings timings = {0};
 218
 219                 dssdrv->get_timings(dssdev, &timings);
 220
 221                 copy_timings_omap_to_drm(mode, &timings);
 222
 223                 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
 224                 drm_mode_set_name(mode);
 225                 drm_mode_probed_add(connector, mode);
 226
 227                 n = 1;
 228         }
 229
 230         return n;
 231 }
 232
 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;
 243
 244         copy_timings_drm_to_omap(&timings, mode);
 245         mode->vrefresh = drm_mode_vrefresh(mode);
 246
 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};
 256
 257                 dssdrv->get_timings(dssdev, &t);
 258
 259                 if (memcmp(&timings, &t, sizeof(struct omap_video_timings)))
 260                         r = -EINVAL;
 261                 else
 262                         r = 0;
 263         }
 264
 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         }
 274
 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);
 283
 284         return ret;
 285 }
 286
 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 }
 293
 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 };
 300
 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 };
 306
 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);
 314
 315         /* TODO: enable when supported in dss */
 316         VERB("%s: %d,%d, %dx%d", omap_connector->dssdev->name, x, y, w, h);
 317 }
 318
 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;
 326
 327         DBG("%s", dssdev->name);
 328
 329         omap_dss_get_device(dssdev);
 330
 331         omap_connector = kzalloc(sizeof(struct omap_connector), GFP_KERNEL);
 332         if (!omap_connector)
 333                 goto fail;
 334
 335         omap_connector->dssdev = dssdev;
 336         omap_connector->encoder = encoder;
 337
 338         connector = &omap_connector->base;
 339
 340         drm_connector_init(dev, connector, &omap_connector_funcs,
 341                                 connector_type);
 342         drm_connector_helper_add(connector, &omap_connector_helper_funcs);
 343
 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;
 351
 352         connector->interlace_allowed = 1;
 353         connector->doublescan_allowed = 0;
 354
 355         drm_sysfs_connector_add(connector);
 356
 357         return connector;
 358
 359 fail:
 360         if (connector)
 361                 omap_connector_destroy(connector);
 362
 363         return NULL;
 364 }