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
  35 #define MAX_EDID 256
  36 #define to_exynos_connector(x)  container_of(x, struct exynos_drm_connector,\
  37                                 drm_connector)
  38
  39 struct exynos_drm_connector {
  40         struct drm_connector    drm_connector;
  41         uint32_t                encoder_id;
  42         struct exynos_drm_manager *manager;
  43 };
  44
  45 /* convert exynos_video_timings to drm_display_mode */
  46 static inline void
  47 convert_to_display_mode(struct drm_display_mode *mode,
  48                         struct exynos_drm_panel_info *panel)
  49 {
  50         struct fb_videomode *timing = &panel->timing;
  51         DRM_DEBUG_KMS("%s\n", __FILE__);
  52
  53         mode->clock = timing->pixclock / 1000;
  54         mode->vrefresh = timing->refresh;
  55
  56         mode->hdisplay = timing->xres;
  57         mode->hsync_start = mode->hdisplay + timing->right_margin;
  58         mode->hsync_end = mode->hsync_start + timing->hsync_len;
  59         mode->htotal = mode->hsync_end + timing->left_margin;
  60
  61         mode->vdisplay = timing->yres;
  62         mode->vsync_start = mode->vdisplay + timing->lower_margin;
  63         mode->vsync_end = mode->vsync_start + timing->vsync_len;
  64         mode->vtotal = mode->vsync_end + timing->upper_margin;
  65         mode->width_mm = panel->width_mm;
  66         mode->height_mm = panel->height_mm;
  67
  68         if (timing->vmode & FB_VMODE_INTERLACED)
  69                 mode->flags |= DRM_MODE_FLAG_INTERLACE;
  70
  71         if (timing->vmode & FB_VMODE_DOUBLE)
  72                 mode->flags |= DRM_MODE_FLAG_DBLSCAN;
  73 }
  74
  75 /* convert drm_display_mode to exynos_video_timings */
  76 static inline void
  77 convert_to_video_timing(struct fb_videomode *timing,
  78                         struct drm_display_mode *mode)
  79 {
  80         DRM_DEBUG_KMS("%s\n", __FILE__);
  81
  82         memset(timing, 0, sizeof(*timing));
  83
  84         timing->pixclock = mode->clock * 1000;
  85         timing->refresh = drm_mode_vrefresh(mode);
  86
  87         timing->xres = mode->hdisplay;
  88         timing->right_margin = mode->hsync_start - mode->hdisplay;
  89         timing->hsync_len = mode->hsync_end - mode->hsync_start;
  90         timing->left_margin = mode->htotal - mode->hsync_end;
  91
  92         timing->yres = mode->vdisplay;
  93         timing->lower_margin = mode->vsync_start - mode->vdisplay;
  94         timing->vsync_len = mode->vsync_end - mode->vsync_start;
  95         timing->upper_margin = mode->vtotal - mode->vsync_end;
  96
  97         if (mode->flags & DRM_MODE_FLAG_INTERLACE)
  98                 timing->vmode = FB_VMODE_INTERLACED;
  99         else
 100                 timing->vmode = FB_VMODE_NONINTERLACED;
 101
 102         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 103                 timing->vmode |= FB_VMODE_DOUBLE;
 104 }
 105
 106 static int exynos_drm_connector_get_modes(struct drm_connector *connector)
 107 {
 108         struct exynos_drm_connector *exynos_connector =
 109                                         to_exynos_connector(connector);
 110         struct exynos_drm_manager *manager = exynos_connector->manager;
 111         struct exynos_drm_display_ops *display_ops = manager->display_ops;
 112         unsigned int count;
 113
 114         DRM_DEBUG_KMS("%s\n", __FILE__);
 115
 116         if (!display_ops) {
 117                 DRM_DEBUG_KMS("display_ops is null.\n");
 118                 return 0;
 119         }
 120
 121         /*
 122          * if get_edid() exists then get_edid() callback of hdmi side
 123          * is called to get edid data through i2c interface else
 124          * get timing from the FIMD driver(display controller).
 125          *
 126          * P.S. in case of lcd panel, count is always 1 if success
 127          * because lcd panel has only one mode.
 128          */
 129         if (display_ops->get_edid) {
 130                 int ret;
 131                 void *edid;
 132
 133                 edid = kzalloc(MAX_EDID, GFP_KERNEL);
 134                 if (!edid) {
 135                         DRM_ERROR("failed to allocate edid\n");
 136                         return 0;
 137                 }
 138
 139                 ret = display_ops->get_edid(manager->dev, connector,
 140                                                 edid, MAX_EDID);
 141                 if (ret < 0) {
 142                         DRM_ERROR("failed to get edid data.\n");
 143                         kfree(edid);
 144                         edid = NULL;
 145                         return 0;
 146                 }
 147
 148                 drm_mode_connector_update_edid_property(connector, edid);
 149                 count = drm_add_edid_modes(connector, edid);
 150
 151                 kfree(connector->display_info.raw_edid);
 152                 connector->display_info.raw_edid = edid;
 153         } else {
 154                 struct drm_display_mode *mode = drm_mode_create(connector->dev);
 155                 struct exynos_drm_panel_info *panel;
 156
 157                 if (display_ops->get_panel)
 158                         panel = display_ops->get_panel(manager->dev);
 159                 else {
 160                         drm_mode_destroy(connector->dev, mode);
 161                         return 0;
 162                 }
 163
 164                 convert_to_display_mode(mode, panel);
 165                 connector->display_info.width_mm = mode->width_mm;
 166                 connector->display_info.height_mm = mode->height_mm;
 167
 168                 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
 169                 drm_mode_set_name(mode);
 170                 drm_mode_probed_add(connector, mode);
 171
 172                 count = 1;
 173         }
 174
 175         return count;
 176 }
 177
 178 static int exynos_drm_connector_mode_valid(struct drm_connector *connector,
 179                                             struct drm_display_mode *mode)
 180 {
 181         struct exynos_drm_connector *exynos_connector =
 182                                         to_exynos_connector(connector);
 183         struct exynos_drm_manager *manager = exynos_connector->manager;
 184         struct exynos_drm_display_ops *display_ops = manager->display_ops;
 185         struct fb_videomode timing;
 186         int ret = MODE_BAD;
 187
 188         DRM_DEBUG_KMS("%s\n", __FILE__);
 189
 190         convert_to_video_timing(&timing, mode);
 191
 192         if (display_ops && display_ops->check_timing)
 193                 if (!display_ops->check_timing(manager->dev, (void *)&timing))
 194                         ret = MODE_OK;
 195
 196         return ret;
 197 }
 198
 199 struct drm_encoder *exynos_drm_best_encoder(struct drm_connector *connector)
 200 {
 201         struct drm_device *dev = connector->dev;
 202         struct exynos_drm_connector *exynos_connector =
 203                                         to_exynos_connector(connector);
 204         struct drm_mode_object *obj;
 205         struct drm_encoder *encoder;
 206
 207         DRM_DEBUG_KMS("%s\n", __FILE__);
 208
 209         obj = drm_mode_object_find(dev, exynos_connector->encoder_id,
 210                                    DRM_MODE_OBJECT_ENCODER);
 211         if (!obj) {
 212                 DRM_DEBUG_KMS("Unknown ENCODER ID %d\n",
 213                                 exynos_connector->encoder_id);
 214                 return NULL;
 215         }
 216
 217         encoder = obj_to_encoder(obj);
 218
 219         return encoder;
 220 }
 221
 222 static struct drm_connector_helper_funcs exynos_connector_helper_funcs = {
 223         .get_modes      = exynos_drm_connector_get_modes,
 224         .mode_valid     = exynos_drm_connector_mode_valid,
 225         .best_encoder   = exynos_drm_best_encoder,
 226 };
 227
 228 /* get detection status of display device. */
 229 static enum drm_connector_status
 230 exynos_drm_connector_detect(struct drm_connector *connector, bool force)
 231 {
 232         struct exynos_drm_connector *exynos_connector =
 233                                         to_exynos_connector(connector);
 234         struct exynos_drm_manager *manager = exynos_connector->manager;
 235         struct exynos_drm_display_ops *display_ops =
 236                                         manager->display_ops;
 237         enum drm_connector_status status = connector_status_disconnected;
 238
 239         DRM_DEBUG_KMS("%s\n", __FILE__);
 240
 241         if (display_ops && display_ops->is_connected) {
 242                 if (display_ops->is_connected(manager->dev))
 243                         status = connector_status_connected;
 244                 else
 245                         status = connector_status_disconnected;
 246         }
 247
 248         return status;
 249 }
 250
 251 static void exynos_drm_connector_destroy(struct drm_connector *connector)
 252 {
 253         struct exynos_drm_connector *exynos_connector =
 254                 to_exynos_connector(connector);
 255
 256         DRM_DEBUG_KMS("%s\n", __FILE__);
 257
 258         drm_sysfs_connector_remove(connector);
 259         drm_connector_cleanup(connector);
 260         kfree(exynos_connector);
 261 }
 262
 263 static struct drm_connector_funcs exynos_connector_funcs = {
 264         .dpms           = drm_helper_connector_dpms,
 265         .fill_modes     = drm_helper_probe_single_connector_modes,
 266         .detect         = exynos_drm_connector_detect,
 267         .destroy        = exynos_drm_connector_destroy,
 268 };
 269
 270 struct drm_connector *exynos_drm_connector_create(struct drm_device *dev,
 271                                                    struct drm_encoder *encoder)
 272 {
 273         struct exynos_drm_connector *exynos_connector;
 274         struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
 275         struct drm_connector *connector;
 276         int type;
 277         int err;
 278
 279         DRM_DEBUG_KMS("%s\n", __FILE__);
 280
 281         exynos_connector = kzalloc(sizeof(*exynos_connector), GFP_KERNEL);
 282         if (!exynos_connector) {
 283                 DRM_ERROR("failed to allocate connector\n");
 284                 return NULL;
 285         }
 286
 287         connector = &exynos_connector->drm_connector;
 288
 289         switch (manager->display_ops->type) {
 290         case EXYNOS_DISPLAY_TYPE_HDMI:
 291                 type = DRM_MODE_CONNECTOR_HDMIA;
 292                 connector->interlace_allowed = true;
 293                 connector->polled = DRM_CONNECTOR_POLL_HPD;
 294                 break;
 295         default:
 296                 type = DRM_MODE_CONNECTOR_Unknown;
 297                 break;
 298         }
 299
 300         drm_connector_init(dev, connector, &exynos_connector_funcs, type);
 301         drm_connector_helper_add(connector, &exynos_connector_helper_funcs);
 302
 303         err = drm_sysfs_connector_add(connector);
 304         if (err)
 305                 goto err_connector;
 306
 307         exynos_connector->encoder_id = encoder->base.id;
 308         exynos_connector->manager = manager;
 309         connector->encoder = encoder;
 310
 311         err = drm_mode_connector_attach_encoder(connector, encoder);
 312         if (err) {
 313                 DRM_ERROR("failed to attach a connector to a encoder\n");
 314                 goto err_sysfs;
 315         }
 316
 317         DRM_DEBUG_KMS("connector has been created\n");
 318
 319         return connector;
 320
 321 err_sysfs:
 322         drm_sysfs_connector_remove(connector);
 323 err_connector:
 324         drm_connector_cleanup(connector);
 325         kfree(exynos_connector);
 326         return NULL;
 327 }
 328
 329 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 330 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 331 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 332 MODULE_DESCRIPTION("Samsung SoC DRM Connector Driver");
 333 MODULE_LICENSE("GPL");