drivers/gpu/drm/exynos/exynos_drm_connector.c

   1 /*
   2  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   3  * Authors:
   4  *      Inki Dae <inki.dae@samsung.com>
   5  *      Joonyoung Shim <jy0922.shim@samsung.com>
   6  *      Seung-Woo Kim <sw0312.kim@samsung.com>
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the next
  16  * paragraph) shall be included in all copies or substantial portions of the
  17  * Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  25  * OTHER DEALINGS IN THE SOFTWARE.
  26  */
  27
  28 #include "drmP.h"
  29 #include "drm_crtc_helper.h"
  30
  31 #include <drm/exynos_drm.h>
  32 #include "exynos_drm_drv.h"
  33 #include "exynos_drm_encoder.h"
  34 #include "exynos_drm_display.h"
  35
  36 #define MAX_EDID 256
  37 #define to_exynos_connector(x)  container_of(x, struct exynos_drm_connector,\
  38                                 drm_connector)
  39
  40 struct exynos_drm_connector {
  41         struct drm_connector    drm_connector;
  42         uint32_t                encoder_id;
  43         struct exynos_drm_display *display;
  44 };
  45
  46 /* convert exynos_video_timings to drm_display_mode */
  47 static inline void
  48 convert_to_display_mode(struct drm_display_mode *mode,
  49                         struct exynos_drm_panel_info *panel)
  50 {
  51         struct fb_videomode *timing = &panel->timing;
  52         DRM_DEBUG_KMS("%s\n", __FILE__);
  53
  54         mode->clock = timing->pixclock / 1000;
  55         mode->vrefresh = timing->refresh;
  56
  57         mode->hdisplay = timing->xres;
  58         mode->hsync_start = mode->hdisplay + timing->right_margin;
  59         mode->hsync_end = mode->hsync_start + timing->hsync_len;
  60         mode->htotal = mode->hsync_end + timing->left_margin;
  61
  62         mode->vdisplay = timing->yres;
  63         mode->vsync_start = mode->vdisplay + timing->lower_margin;
  64         mode->vsync_end = mode->vsync_start + timing->vsync_len;
  65         mode->vtotal = mode->vsync_end + timing->upper_margin;
  66         mode->width_mm = panel->width_mm;
  67         mode->height_mm = panel->height_mm;
  68
  69         if (timing->vmode & FB_VMODE_INTERLACED)
  70                 mode->flags |= DRM_MODE_FLAG_INTERLACE;
  71
  72         if (timing->vmode & FB_VMODE_DOUBLE)
  73                 mode->flags |= DRM_MODE_FLAG_DBLSCAN;
  74 }
  75
  76 /* convert drm_display_mode to exynos_video_timings */
  77 static inline void
  78 convert_to_video_timing(struct fb_videomode *timing,
  79                         struct drm_display_mode *mode)
  80 {
  81         DRM_DEBUG_KMS("%s\n", __FILE__);
  82
  83         memset(timing, 0, sizeof(*timing));
  84
  85         timing->pixclock = mode->clock * 1000;
  86         timing->refresh = drm_mode_vrefresh(mode);
  87
  88         timing->xres = mode->hdisplay;
  89         timing->right_margin = mode->hsync_start - mode->hdisplay;
  90         timing->hsync_len = mode->hsync_end - mode->hsync_start;
  91         timing->left_margin = mode->htotal - mode->hsync_end;
  92
  93         timing->yres = mode->vdisplay;
  94         timing->lower_margin = mode->vsync_start - mode->vdisplay;
  95         timing->vsync_len = mode->vsync_end - mode->vsync_start;
  96         timing->upper_margin = mode->vtotal - mode->vsync_end;
  97
  98         if (mode->flags & DRM_MODE_FLAG_INTERLACE)
  99                 timing->vmode = FB_VMODE_INTERLACED;
 100         else
 101                 timing->vmode = FB_VMODE_NONINTERLACED;
 102
 103         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 104                 timing->vmode |= FB_VMODE_DOUBLE;
 105 }
 106
 107 static struct exynos_drm_display *display_from_connector(
 108                 struct drm_connector *connector)
 109 {
 110         return to_exynos_connector(connector)->display;
 111 }
 112
 113 static int exynos_drm_connector_get_edid(struct drm_connector *connector)
 114 {
 115         struct exynos_drm_display *display = display_from_connector(connector);
 116         int ret;
 117         struct edid *edid;
 118
 119         if (!display->panel_ops->get_edid)
 120                 return -EINVAL;
 121
 122         edid = display->panel_ops->get_edid(display->panel_ctx, connector);
 123         if (IS_ERR_OR_NULL(edid)) {
 124                 ret = PTR_ERR(edid);
 125                 edid = NULL;
 126                 DRM_ERROR("Panel operation get_edid failed %d\n", ret);
 127                 goto out;
 128         }
 129
 130         ret = drm_mode_connector_update_edid_property(connector, edid);
 131         if (ret) {
 132                 DRM_ERROR("update edid property failed(%d)\n", ret);
 133                 goto out;
 134         }
 135
 136         ret = drm_add_edid_modes(connector, edid);
 137         if (ret < 0) {
 138                 DRM_ERROR("Add edid modes failed %d\n", ret);
 139                 goto out;
 140         }
 141
 142 out:
 143         connector->display_info.raw_edid = NULL;
 144         kfree(edid);
 145         return ret;
 146 }
 147
 148 static int exynos_drm_connector_get_panel(struct drm_connector *connector)
 149 {
 150         struct exynos_drm_display *display = display_from_connector(connector);
 151         struct drm_display_mode *mode;
 152         struct exynos_drm_panel_info *panel;
 153         int ret;
 154
 155         if (!display->controller_ops->get_panel)
 156                 return -EINVAL;
 157
 158         panel = display->controller_ops->get_panel(
 159                                 display->controller_ctx);
 160
 161         for (ret = 0; panel && ret < MAX_NR_PANELS; ret++) {
 162                 if (panel[ret].timing.xres == -1 &&
 163                     panel[ret].timing.yres == -1)
 164                         break;
 165
 166                 mode = drm_mode_create(connector->dev);
 167                 mode->type = DRM_MODE_TYPE_DRIVER;
 168
 169                 /* Only the first panel is preferred mode */
 170                 if (ret)
 171                         mode->type |= DRM_MODE_TYPE_PREFERRED;
 172                 else
 173                         mode->type |= DRM_MODE_TYPE_USERDEF;
 174
 175                 convert_to_display_mode(mode, &panel[ret]);
 176                 connector->display_info.width_mm = mode->width_mm;
 177                 connector->display_info.height_mm = mode->height_mm;
 178                 drm_mode_set_name(mode);
 179                 drm_mode_probed_add(connector, mode);
 180         }
 181
 182         return ret;
 183 }
 184
 185 static int exynos_drm_connector_get_modes(struct drm_connector *connector)
 186 {
 187         int ret;
 188
 189         DRM_DEBUG_KMS("%s\n", __FILE__);
 190
 191         /*
 192          * First try getting modes from EDID. If that doesn't yield any results,
 193          * fall back to the panel call.
 194          */
 195         ret = exynos_drm_connector_get_edid(connector);
 196         if (ret > 0)
 197                 return ret;
 198
 199         return exynos_drm_connector_get_panel(connector);
 200 }
 201
 202 static int exynos_drm_connector_mode_valid(struct drm_connector *connector,
 203                                             struct drm_display_mode *mode)
 204 {
 205         struct exynos_drm_display *display = display_from_connector(connector);
 206         struct fb_videomode timing;
 207         int ret = MODE_BAD;
 208
 209         DRM_DEBUG_KMS("%s\n", __FILE__);
 210
 211         convert_to_video_timing(&timing, mode);
 212
 213         if (!display->panel_ops->check_timing)
 214                 return ret;
 215
 216         if (!display->panel_ops->check_timing(display->panel_ctx, &timing))
 217                 ret = MODE_OK;
 218
 219         return ret;
 220 }
 221
 222 struct drm_encoder *exynos_drm_best_encoder(struct drm_connector *connector)
 223 {
 224         struct drm_device *dev = connector->dev;
 225         struct exynos_drm_connector *exynos_connector =
 226                                         to_exynos_connector(connector);
 227         struct drm_mode_object *obj;
 228         struct drm_encoder *encoder;
 229
 230         DRM_DEBUG_KMS("%s\n", __FILE__);
 231
 232         obj = drm_mode_object_find(dev, exynos_connector->encoder_id,
 233                                    DRM_MODE_OBJECT_ENCODER);
 234         if (!obj) {
 235                 DRM_DEBUG_KMS("Unknown ENCODER ID %d\n",
 236                                 exynos_connector->encoder_id);
 237                 return NULL;
 238         }
 239
 240         encoder = obj_to_encoder(obj);
 241
 242         return encoder;
 243 }
 244
 245 static struct drm_connector_helper_funcs exynos_connector_helper_funcs = {
 246         .get_modes      = exynos_drm_connector_get_modes,
 247         .mode_valid     = exynos_drm_connector_mode_valid,
 248         .best_encoder   = exynos_drm_best_encoder,
 249 };
 250
 251 static int exynos_drm_connector_fill_modes(struct drm_connector *connector,
 252                                 unsigned int max_width, unsigned int max_height)
 253 {
 254         struct exynos_drm_display *display = display_from_connector(connector);
 255         unsigned int width, height;
 256
 257         width = max_width;
 258         height = max_height;
 259
 260         /*
 261          * If the specific driver wants to find desired_mode using maximum
 262          * resolution then get max width and height from that driver.
 263          */
 264         if (display->panel_ops->get_max_res)
 265                 display->panel_ops->get_max_res(display->panel_ctx, &width,
 266                                 &height);
 267
 268         return drm_helper_probe_single_connector_modes(connector, width,
 269                                                         height);
 270 }
 271
 272 /* get detection status of display device. */
 273 static enum drm_connector_status
 274 exynos_drm_connector_detect(struct drm_connector *connector, bool force)
 275 {
 276         struct exynos_drm_display *display = display_from_connector(connector);
 277         enum drm_connector_status status;
 278
 279         DRM_DEBUG_KMS("%s\n", __FILE__);
 280
 281         if (display->panel_ops->is_connected &&
 282             display->panel_ops->is_connected(display->panel_ctx))
 283                 status = connector_status_connected;
 284         else
 285                 status = connector_status_disconnected;
 286
 287         return status;
 288 }
 289
 290 static void exynos_drm_connector_destroy(struct drm_connector *connector)
 291 {
 292         struct exynos_drm_connector *exynos_connector =
 293                 to_exynos_connector(connector);
 294
 295         DRM_DEBUG_KMS("%s\n", __FILE__);
 296
 297         drm_sysfs_connector_remove(connector);
 298         drm_connector_cleanup(connector);
 299         kfree(exynos_connector);
 300 }
 301
 302 static struct drm_connector_funcs exynos_connector_funcs = {
 303         .dpms           = drm_helper_connector_dpms,
 304         .fill_modes     = exynos_drm_connector_fill_modes,
 305         .detect         = exynos_drm_connector_detect,
 306         .destroy        = exynos_drm_connector_destroy,
 307 };
 308
 309 struct drm_connector *exynos_drm_connector_create(struct drm_device *dev,
 310                                                    struct drm_encoder *encoder)
 311 {
 312         struct exynos_drm_connector *exynos_connector;
 313         struct exynos_drm_display *display = exynos_drm_get_display(encoder);
 314         struct drm_connector *connector;
 315         int type;
 316         int err;
 317
 318         DRM_DEBUG_KMS("%s\n", __FILE__);
 319
 320         exynos_connector = kzalloc(sizeof(*exynos_connector), GFP_KERNEL);
 321         if (!exynos_connector) {
 322                 DRM_ERROR("failed to allocate connector\n");
 323                 return NULL;
 324         }
 325
 326         connector = &exynos_connector->drm_connector;
 327
 328         switch (display->display_type) {
 329         case EXYNOS_DRM_DISPLAY_TYPE_MIXER:
 330                 type = DRM_MODE_CONNECTOR_HDMIA;
 331                 connector->interlace_allowed = true;
 332                 connector->polled = DRM_CONNECTOR_POLL_HPD;
 333                 break;
 334         case EXYNOS_DRM_DISPLAY_TYPE_VIDI:
 335                 type = DRM_MODE_CONNECTOR_VIRTUAL;
 336                 connector->polled = DRM_CONNECTOR_POLL_HPD;
 337                 break;
 338         case EXYNOS_DRM_DISPLAY_TYPE_FIMD:
 339                 type = DRM_MODE_CONNECTOR_eDP;
 340                 connector->polled = DRM_CONNECTOR_POLL_HPD;
 341                 break;
 342         default:
 343                 type = DRM_MODE_CONNECTOR_Unknown;
 344                 break;
 345         }
 346
 347         drm_connector_init(dev, connector, &exynos_connector_funcs, type);
 348         drm_connector_helper_add(connector, &exynos_connector_helper_funcs);
 349
 350         err = drm_sysfs_connector_add(connector);
 351         if (err)
 352                 goto err_connector;
 353
 354         exynos_connector->encoder_id = encoder->base.id;
 355         exynos_connector->display = display;
 356         connector->encoder = encoder;
 357
 358         err = drm_mode_connector_attach_encoder(connector, encoder);
 359         if (err) {
 360                 DRM_ERROR("failed to attach a connector to a encoder\n");
 361                 goto err_sysfs;
 362         }
 363
 364         DRM_DEBUG_KMS("connector has been created\n");
 365
 366         return connector;
 367
 368 err_sysfs:
 369         drm_sysfs_connector_remove(connector);
 370 err_connector:
 371         drm_connector_cleanup(connector);
 372         kfree(exynos_connector);
 373         return NULL;
 374 }