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         void *edid;
 118
 119         if (!display->panel_ops->get_edid)
 120                 return -EINVAL;
 121
 122         edid = kzalloc(MAX_EDID, GFP_KERNEL);
 123         if (!edid) {
 124                 DRM_ERROR("failed to allocate edid\n");
 125                 return -ENOMEM;
 126         }
 127
 128         ret = display->panel_ops->get_edid(display->panel_ctx,
 129                         connector, edid, MAX_EDID);
 130         if (ret) {
 131                 DRM_ERROR("Panel operation get_edid failed %d\n", ret);
 132                 goto err;
 133         }
 134
 135         ret = drm_mode_connector_update_edid_property(connector, edid);
 136         if (ret) {
 137                 DRM_ERROR("update edid property failed(%d)\n", ret);
 138                 goto err;
 139         }
 140
 141         ret = drm_add_edid_modes(connector, edid);
 142         if (ret < 0) {
 143                 DRM_ERROR("Add edid modes failed %d\n", ret);
 144                 goto err;
 145         }
 146
 147         kfree(connector->display_info.raw_edid);
 148         connector->display_info.raw_edid = edid;
 149
 150         return ret;
 151
 152 err:
 153         kfree(edid);
 154         return ret;
 155 }
 156
 157 static int exynos_drm_connector_get_panel(struct drm_connector *connector)
 158 {
 159         struct exynos_drm_display *display = display_from_connector(connector);
 160         struct drm_display_mode *mode;
 161         struct exynos_drm_panel_info *panel;
 162         int ret;
 163
 164         if (!display->controller_ops->get_panel)
 165                 return -EINVAL;
 166
 167         panel = display->controller_ops->get_panel(
 168                                 display->controller_ctx);
 169
 170         for (ret = 0; panel && ret < MAX_NR_PANELS; ret++) {
 171                 if (panel[ret].timing.xres == -1 &&
 172                     panel[ret].timing.yres == -1)
 173                         break;
 174
 175                 mode = drm_mode_create(connector->dev);
 176                 mode->type = DRM_MODE_TYPE_DRIVER;
 177
 178                 /* Only the first panel is preferred mode */
 179                 if (ret)
 180                         mode->type |= DRM_MODE_TYPE_PREFERRED;
 181                 else
 182                         mode->type |= DRM_MODE_TYPE_USERDEF;
 183
 184                 convert_to_display_mode(mode, &panel[ret]);
 185                 connector->display_info.width_mm = mode->width_mm;
 186                 connector->display_info.height_mm = mode->height_mm;
 187                 drm_mode_set_name(mode);
 188                 drm_mode_probed_add(connector, mode);
 189         }
 190
 191         return ret;
 192 }
 193
 194 static int exynos_drm_connector_get_modes(struct drm_connector *connector)
 195 {
 196         int ret;
 197
 198         DRM_DEBUG_KMS("%s\n", __FILE__);
 199
 200         /*
 201          * First try getting modes from EDID. If that doesn't yield any results,
 202          * fall back to the panel call.
 203          */
 204         ret = exynos_drm_connector_get_edid(connector);
 205         if (ret > 0)
 206                 return ret;
 207
 208         return exynos_drm_connector_get_panel(connector);
 209 }
 210
 211 static int exynos_drm_connector_mode_valid(struct drm_connector *connector,
 212                                             struct drm_display_mode *mode)
 213 {
 214         struct exynos_drm_display *display = display_from_connector(connector);
 215         struct fb_videomode timing;
 216         int ret = MODE_BAD;
 217
 218         DRM_DEBUG_KMS("%s\n", __FILE__);
 219
 220         convert_to_video_timing(&timing, mode);
 221
 222         if (!display->panel_ops->check_timing)
 223                 return ret;
 224
 225         if (!display->panel_ops->check_timing(display->panel_ctx, &timing))
 226                 ret = MODE_OK;
 227
 228         return ret;
 229 }
 230
 231 struct drm_encoder *exynos_drm_best_encoder(struct drm_connector *connector)
 232 {
 233         struct drm_device *dev = connector->dev;
 234         struct exynos_drm_connector *exynos_connector =
 235                                         to_exynos_connector(connector);
 236         struct drm_mode_object *obj;
 237         struct drm_encoder *encoder;
 238
 239         DRM_DEBUG_KMS("%s\n", __FILE__);
 240
 241         obj = drm_mode_object_find(dev, exynos_connector->encoder_id,
 242                                    DRM_MODE_OBJECT_ENCODER);
 243         if (!obj) {
 244                 DRM_DEBUG_KMS("Unknown ENCODER ID %d\n",
 245                                 exynos_connector->encoder_id);
 246                 return NULL;
 247         }
 248
 249         encoder = obj_to_encoder(obj);
 250
 251         return encoder;
 252 }
 253
 254 static struct drm_connector_helper_funcs exynos_connector_helper_funcs = {
 255         .get_modes      = exynos_drm_connector_get_modes,
 256         .mode_valid     = exynos_drm_connector_mode_valid,
 257         .best_encoder   = exynos_drm_best_encoder,
 258 };
 259
 260 static int exynos_drm_connector_fill_modes(struct drm_connector *connector,
 261                                 unsigned int max_width, unsigned int max_height)
 262 {
 263         struct exynos_drm_display *display = display_from_connector(connector);
 264         unsigned int width, height;
 265
 266         width = max_width;
 267         height = max_height;
 268
 269         /*
 270          * If the specific driver wants to find desired_mode using maximum
 271          * resolution then get max width and height from that driver.
 272          */
 273         if (display->panel_ops->get_max_res)
 274                 display->panel_ops->get_max_res(display->panel_ctx, &width,
 275                                 &height);
 276
 277         return drm_helper_probe_single_connector_modes(connector, width,
 278                                                         height);
 279 }
 280
 281 /* get detection status of display device. */
 282 static enum drm_connector_status
 283 exynos_drm_connector_detect(struct drm_connector *connector, bool force)
 284 {
 285         struct exynos_drm_display *display = display_from_connector(connector);
 286         enum drm_connector_status status;
 287
 288         DRM_DEBUG_KMS("%s\n", __FILE__);
 289
 290         if (display->panel_ops->is_connected &&
 291             display->panel_ops->is_connected(display->panel_ctx))
 292                 status = connector_status_connected;
 293         else
 294                 status = connector_status_disconnected;
 295
 296         return status;
 297 }
 298
 299 static void exynos_drm_connector_destroy(struct drm_connector *connector)
 300 {
 301         struct exynos_drm_connector *exynos_connector =
 302                 to_exynos_connector(connector);
 303
 304         DRM_DEBUG_KMS("%s\n", __FILE__);
 305
 306         drm_sysfs_connector_remove(connector);
 307         drm_connector_cleanup(connector);
 308         kfree(exynos_connector);
 309 }
 310
 311 static struct drm_connector_funcs exynos_connector_funcs = {
 312         .dpms           = drm_helper_connector_dpms,
 313         .fill_modes     = exynos_drm_connector_fill_modes,
 314         .detect         = exynos_drm_connector_detect,
 315         .destroy        = exynos_drm_connector_destroy,
 316 };
 317
 318 struct drm_connector *exynos_drm_connector_create(struct drm_device *dev,
 319                                                    struct drm_encoder *encoder)
 320 {
 321         struct exynos_drm_connector *exynos_connector;
 322         struct exynos_drm_display *display = exynos_drm_get_display(encoder);
 323         struct drm_connector *connector;
 324         int type;
 325         int err;
 326
 327         DRM_DEBUG_KMS("%s\n", __FILE__);
 328
 329         exynos_connector = kzalloc(sizeof(*exynos_connector), GFP_KERNEL);
 330         if (!exynos_connector) {
 331                 DRM_ERROR("failed to allocate connector\n");
 332                 return NULL;
 333         }
 334
 335         connector = &exynos_connector->drm_connector;
 336
 337         switch (display->display_type) {
 338         case EXYNOS_DRM_DISPLAY_TYPE_MIXER:
 339                 type = DRM_MODE_CONNECTOR_HDMIA;
 340                 connector->interlace_allowed = true;
 341                 connector->polled = DRM_CONNECTOR_POLL_HPD;
 342                 break;
 343         case EXYNOS_DRM_DISPLAY_TYPE_VIDI:
 344                 type = DRM_MODE_CONNECTOR_VIRTUAL;
 345                 connector->polled = DRM_CONNECTOR_POLL_HPD;
 346                 break;
 347         case EXYNOS_DRM_DISPLAY_TYPE_FIMD:
 348                 type = DRM_MODE_CONNECTOR_eDP;
 349                 connector->polled = DRM_CONNECTOR_POLL_HPD;
 350                 break;
 351         default:
 352                 type = DRM_MODE_CONNECTOR_Unknown;
 353                 break;
 354         }
 355
 356         drm_connector_init(dev, connector, &exynos_connector_funcs, type);
 357         drm_connector_helper_add(connector, &exynos_connector_helper_funcs);
 358
 359         err = drm_sysfs_connector_add(connector);
 360         if (err)
 361                 goto err_connector;
 362
 363         exynos_connector->encoder_id = encoder->base.id;
 364         exynos_connector->display = display;
 365         connector->encoder = encoder;
 366
 367         err = drm_mode_connector_attach_encoder(connector, encoder);
 368         if (err) {
 369                 DRM_ERROR("failed to attach a connector to a encoder\n");
 370                 goto err_sysfs;
 371         }
 372
 373         DRM_DEBUG_KMS("connector has been created\n");
 374
 375         return connector;
 376
 377 err_sysfs:
 378         drm_sysfs_connector_remove(connector);
 379 err_connector:
 380         drm_connector_cleanup(connector);
 381         kfree(exynos_connector);
 382         return NULL;
 383 }