drivers/gpu/drm/gma500/mdfld_dsi_output.c

   1 /*
   2  * Copyright © 2010 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  * jim liu <jim.liu@intel.com>
  25  * Jackie Li<yaodong.li@intel.com>
  26  */
  27
  28 #include <linux/module.h>
  29
  30 #include "mdfld_dsi_output.h"
  31 #include "mdfld_dsi_dpi.h"
  32 #include "mdfld_output.h"
  33 #include "mdfld_dsi_pkg_sender.h"
  34 #include "tc35876x-dsi-lvds.h"
  35 #include <linux/pm_runtime.h>
  36 #include <asm/intel_scu_ipc.h>
  37
  38 /* get the LABC from command line. */
  39 static int LABC_control = 1;
  40
  41 #ifdef MODULE
  42 module_param(LABC_control, int, 0644);
  43 #else
  44
  45 static int __init parse_LABC_control(char *arg)
  46 {
  47         /* LABC control can be passed in as a cmdline parameter */
  48         /* to enable this feature add LABC=1 to cmdline */
  49         /* to disable this feature add LABC=0 to cmdline */
  50         if (!arg)
  51                 return -EINVAL;
  52
  53         if (!strcasecmp(arg, "0"))
  54                 LABC_control = 0;
  55         else if (!strcasecmp(arg, "1"))
  56                 LABC_control = 1;
  57
  58         return 0;
  59 }
  60 early_param("LABC", parse_LABC_control);
  61 #endif
  62
  63 /**
  64  * Check and see if the generic control or data buffer is empty and ready.
  65  */
  66 void mdfld_dsi_gen_fifo_ready(struct drm_device *dev, u32 gen_fifo_stat_reg,
  67                                                         u32 fifo_stat)
  68 {
  69         u32 GEN_BF_time_out_count;
  70
  71         /* Check MIPI Adatper command registers */
  72         for (GEN_BF_time_out_count = 0;
  73                         GEN_BF_time_out_count < GEN_FB_TIME_OUT;
  74                         GEN_BF_time_out_count++) {
  75                 if ((REG_READ(gen_fifo_stat_reg) & fifo_stat) == fifo_stat)
  76                         break;
  77                 udelay(100);
  78         }
  79
  80         if (GEN_BF_time_out_count == GEN_FB_TIME_OUT)
  81                 DRM_ERROR("mdfld_dsi_gen_fifo_ready, Timeout. gen_fifo_stat_reg = 0x%x.\n",
  82                                         gen_fifo_stat_reg);
  83 }
  84
  85 /**
  86  * Manage the DSI MIPI keyboard and display brightness.
  87  * FIXME: this is exported to OSPM code. should work out an specific
  88  * display interface to OSPM.
  89  */
  90
  91 void mdfld_dsi_brightness_init(struct mdfld_dsi_config *dsi_config, int pipe)
  92 {
  93         struct mdfld_dsi_pkg_sender *sender =
  94                                 mdfld_dsi_get_pkg_sender(dsi_config);
  95         struct drm_device *dev = sender->dev;
  96         struct drm_psb_private *dev_priv = dev->dev_private;
  97         u32 gen_ctrl_val;
  98
  99         if (!sender) {
 100                 DRM_ERROR("No sender found\n");
 101                 return;
 102         }
 103
 104         /* Set default display backlight value to 85% (0xd8)*/
 105         mdfld_dsi_send_mcs_short(sender, write_display_brightness, 0xd8, 1,
 106                                 true);
 107
 108         /* Set minimum brightness setting of CABC function to 20% (0x33)*/
 109         mdfld_dsi_send_mcs_short(sender, write_cabc_min_bright, 0x33, 1, true);
 110
 111         /* Enable backlight or/and LABC */
 112         gen_ctrl_val = BRIGHT_CNTL_BLOCK_ON | DISPLAY_DIMMING_ON |
 113                                                                 BACKLIGHT_ON;
 114         if (LABC_control == 1)
 115                 gen_ctrl_val |= DISPLAY_DIMMING_ON | DISPLAY_BRIGHTNESS_AUTO
 116                                                                 | GAMMA_AUTO;
 117
 118         if (LABC_control == 1)
 119                 gen_ctrl_val |= AMBIENT_LIGHT_SENSE_ON;
 120
 121         dev_priv->mipi_ctrl_display = gen_ctrl_val;
 122
 123         mdfld_dsi_send_mcs_short(sender, write_ctrl_display, (u8)gen_ctrl_val,
 124                                 1, true);
 125
 126         mdfld_dsi_send_mcs_short(sender, write_ctrl_cabc, UI_IMAGE, 1, true);
 127 }
 128
 129 void mdfld_dsi_brightness_control(struct drm_device *dev, int pipe, int level)
 130 {
 131         struct mdfld_dsi_pkg_sender *sender;
 132         struct drm_psb_private *dev_priv;
 133         struct mdfld_dsi_config *dsi_config;
 134         u32 gen_ctrl_val = 0;
 135         int p_type = TMD_VID;
 136
 137         if (!dev || (pipe != 0 && pipe != 2)) {
 138                 DRM_ERROR("Invalid parameter\n");
 139                 return;
 140         }
 141
 142         p_type = mdfld_get_panel_type(dev, 0);
 143
 144         dev_priv = dev->dev_private;
 145
 146         if (pipe)
 147                 dsi_config = dev_priv->dsi_configs[1];
 148         else
 149                 dsi_config = dev_priv->dsi_configs[0];
 150
 151         sender = mdfld_dsi_get_pkg_sender(dsi_config);
 152
 153         if (!sender) {
 154                 DRM_ERROR("No sender found\n");
 155                 return;
 156         }
 157
 158         gen_ctrl_val = (level * 0xff / MDFLD_DSI_BRIGHTNESS_MAX_LEVEL) & 0xff;
 159
 160         dev_dbg(sender->dev->dev, "pipe = %d, gen_ctrl_val = %d.\n",
 161                                                         pipe, gen_ctrl_val);
 162
 163         if (p_type == TMD_VID) {
 164                 /* Set display backlight value */
 165                 mdfld_dsi_send_mcs_short(sender, tmd_write_display_brightness,
 166                                         (u8)gen_ctrl_val, 1, true);
 167         } else {
 168                 /* Set display backlight value */
 169                 mdfld_dsi_send_mcs_short(sender, write_display_brightness,
 170                                         (u8)gen_ctrl_val, 1, true);
 171
 172                 /* Enable backlight control */
 173                 if (level == 0)
 174                         gen_ctrl_val = 0;
 175                 else
 176                         gen_ctrl_val = dev_priv->mipi_ctrl_display;
 177
 178                 mdfld_dsi_send_mcs_short(sender, write_ctrl_display,
 179                                         (u8)gen_ctrl_val, 1, true);
 180         }
 181 }
 182
 183 static int mdfld_dsi_get_panel_status(struct mdfld_dsi_config *dsi_config,
 184                                 u8 dcs, u32 *data, bool hs)
 185 {
 186         struct mdfld_dsi_pkg_sender *sender
 187                 = mdfld_dsi_get_pkg_sender(dsi_config);
 188
 189         if (!sender || !data) {
 190                 DRM_ERROR("Invalid parameter\n");
 191                 return -EINVAL;
 192         }
 193
 194         return mdfld_dsi_read_mcs(sender, dcs, data, 1, hs);
 195 }
 196
 197 int mdfld_dsi_get_power_mode(struct mdfld_dsi_config *dsi_config, u32 *mode,
 198                         bool hs)
 199 {
 200         if (!dsi_config || !mode) {
 201                 DRM_ERROR("Invalid parameter\n");
 202                 return -EINVAL;
 203         }
 204
 205         return mdfld_dsi_get_panel_status(dsi_config, 0x0a, mode, hs);
 206 }
 207
 208 /*
 209  * NOTE: this function was used by OSPM.
 210  * TODO: will be removed later, should work out display interfaces for OSPM
 211  */
 212 void mdfld_dsi_controller_init(struct mdfld_dsi_config *dsi_config, int pipe)
 213 {
 214         if (!dsi_config || ((pipe != 0) && (pipe != 2))) {
 215                 DRM_ERROR("Invalid parameters\n");
 216                 return;
 217         }
 218
 219         mdfld_dsi_dpi_controller_init(dsi_config, pipe);
 220 }
 221
 222 static void mdfld_dsi_connector_save(struct drm_connector *connector)
 223 {
 224 }
 225
 226 static void mdfld_dsi_connector_restore(struct drm_connector *connector)
 227 {
 228 }
 229
 230 /* FIXME: start using the force parameter */
 231 static enum drm_connector_status
 232 mdfld_dsi_connector_detect(struct drm_connector *connector, bool force)
 233 {
 234         struct mdfld_dsi_connector *dsi_connector
 235                 = mdfld_dsi_connector(connector);
 236
 237         dsi_connector->status = connector_status_connected;
 238
 239         return dsi_connector->status;
 240 }
 241
 242 static int mdfld_dsi_connector_set_property(struct drm_connector *connector,
 243                                 struct drm_property *property,
 244                                 uint64_t value)
 245 {
 246         struct drm_encoder *encoder = connector->encoder;
 247
 248         if (!strcmp(property->name, "scaling mode") && encoder) {
 249                 struct psb_intel_crtc *psb_crtc =
 250                                         to_psb_intel_crtc(encoder->crtc);
 251                 bool centerechange;
 252                 uint64_t val;
 253
 254                 if (!psb_crtc)
 255                         goto set_prop_error;
 256
 257                 switch (value) {
 258                 case DRM_MODE_SCALE_FULLSCREEN:
 259                         break;
 260                 case DRM_MODE_SCALE_NO_SCALE:
 261                         break;
 262                 case DRM_MODE_SCALE_ASPECT:
 263                         break;
 264                 default:
 265                         goto set_prop_error;
 266                 }
 267
 268                 if (drm_connector_property_get_value(connector, property, &val))
 269                         goto set_prop_error;
 270
 271                 if (val == value)
 272                         goto set_prop_done;
 273
 274                 if (drm_connector_property_set_value(connector,
 275                                                         property, value))
 276                         goto set_prop_error;
 277
 278                 centerechange = (val == DRM_MODE_SCALE_NO_SCALE) ||
 279                         (value == DRM_MODE_SCALE_NO_SCALE);
 280
 281                 if (psb_crtc->saved_mode.hdisplay != 0 &&
 282                     psb_crtc->saved_mode.vdisplay != 0) {
 283                         if (centerechange) {
 284                                 if (!drm_crtc_helper_set_mode(encoder->crtc,
 285                                                 &psb_crtc->saved_mode,
 286                                                 encoder->crtc->x,
 287                                                 encoder->crtc->y,
 288                                                 encoder->crtc->fb))
 289                                         goto set_prop_error;
 290                         } else {
 291                                 struct drm_encoder_helper_funcs *funcs =
 292                                                 encoder->helper_private;
 293                                 funcs->mode_set(encoder,
 294                                         &psb_crtc->saved_mode,
 295                                         &psb_crtc->saved_adjusted_mode);
 296                         }
 297                 }
 298         } else if (!strcmp(property->name, "backlight") && encoder) {
 299                 if (drm_connector_property_set_value(connector, property,
 300                                                                         value))
 301                         goto set_prop_error;
 302                 else
 303                         gma_backlight_set(encoder->dev, value);
 304         }
 305 set_prop_done:
 306         return 0;
 307 set_prop_error:
 308         return -1;
 309 }
 310
 311 static void mdfld_dsi_connector_destroy(struct drm_connector *connector)
 312 {
 313         struct mdfld_dsi_connector *dsi_connector =
 314                                         mdfld_dsi_connector(connector);
 315         struct mdfld_dsi_pkg_sender *sender;
 316
 317         if (!dsi_connector)
 318                 return;
 319         drm_sysfs_connector_remove(connector);
 320         drm_connector_cleanup(connector);
 321         sender = dsi_connector->pkg_sender;
 322         mdfld_dsi_pkg_sender_destroy(sender);
 323         kfree(dsi_connector);
 324 }
 325
 326 static int mdfld_dsi_connector_get_modes(struct drm_connector *connector)
 327 {
 328         struct mdfld_dsi_connector *dsi_connector =
 329                                 mdfld_dsi_connector(connector);
 330         struct mdfld_dsi_config *dsi_config =
 331                                 mdfld_dsi_get_config(dsi_connector);
 332         struct drm_display_mode *fixed_mode = dsi_config->fixed_mode;
 333         struct drm_display_mode *dup_mode = NULL;
 334         struct drm_device *dev = connector->dev;
 335
 336         connector->display_info.min_vfreq = 0;
 337         connector->display_info.max_vfreq = 200;
 338         connector->display_info.min_hfreq = 0;
 339         connector->display_info.max_hfreq = 200;
 340
 341         if (fixed_mode) {
 342                 dev_dbg(dev->dev, "fixed_mode %dx%d\n",
 343                                 fixed_mode->hdisplay, fixed_mode->vdisplay);
 344                 dup_mode = drm_mode_duplicate(dev, fixed_mode);
 345                 drm_mode_probed_add(connector, dup_mode);
 346                 return 1;
 347         }
 348         DRM_ERROR("Didn't get any modes!\n");
 349         return 0;
 350 }
 351
 352 static int mdfld_dsi_connector_mode_valid(struct drm_connector *connector,
 353                                                 struct drm_display_mode *mode)
 354 {
 355         struct mdfld_dsi_connector *dsi_connector =
 356                                         mdfld_dsi_connector(connector);
 357         struct mdfld_dsi_config *dsi_config =
 358                                         mdfld_dsi_get_config(dsi_connector);
 359         struct drm_display_mode *fixed_mode = dsi_config->fixed_mode;
 360
 361         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 362                 return MODE_NO_DBLESCAN;
 363
 364         if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 365                 return MODE_NO_INTERLACE;
 366
 367         /**
 368          * FIXME: current DC has no fitting unit, reject any mode setting
 369          * request
 370          * Will figure out a way to do up-scaling(pannel fitting) later.
 371          **/
 372         if (fixed_mode) {
 373                 if (mode->hdisplay != fixed_mode->hdisplay)
 374                         return MODE_PANEL;
 375
 376                 if (mode->vdisplay != fixed_mode->vdisplay)
 377                         return MODE_PANEL;
 378         }
 379
 380         return MODE_OK;
 381 }
 382
 383 static void mdfld_dsi_connector_dpms(struct drm_connector *connector, int mode)
 384 {
 385         if (mode == connector->dpms)
 386                 return;
 387
 388         /*first, execute dpms*/
 389
 390         drm_helper_connector_dpms(connector, mode);
 391 }
 392
 393 static struct drm_encoder *mdfld_dsi_connector_best_encoder(
 394                                 struct drm_connector *connector)
 395 {
 396         struct mdfld_dsi_connector *dsi_connector =
 397                                 mdfld_dsi_connector(connector);
 398         struct mdfld_dsi_config *dsi_config =
 399                                 mdfld_dsi_get_config(dsi_connector);
 400         return &dsi_config->encoder->base.base;
 401 }
 402
 403 /*DSI connector funcs*/
 404 static const struct drm_connector_funcs mdfld_dsi_connector_funcs = {
 405         .dpms = /*drm_helper_connector_dpms*/mdfld_dsi_connector_dpms,
 406         .save = mdfld_dsi_connector_save,
 407         .restore = mdfld_dsi_connector_restore,
 408         .detect = mdfld_dsi_connector_detect,
 409         .fill_modes = drm_helper_probe_single_connector_modes,
 410         .set_property = mdfld_dsi_connector_set_property,
 411         .destroy = mdfld_dsi_connector_destroy,
 412 };
 413
 414 /*DSI connector helper funcs*/
 415 static const struct drm_connector_helper_funcs
 416         mdfld_dsi_connector_helper_funcs = {
 417         .get_modes = mdfld_dsi_connector_get_modes,
 418         .mode_valid = mdfld_dsi_connector_mode_valid,
 419         .best_encoder = mdfld_dsi_connector_best_encoder,
 420 };
 421
 422 static int mdfld_dsi_get_default_config(struct drm_device *dev,
 423                                 struct mdfld_dsi_config *config, int pipe)
 424 {
 425         if (!dev || !config) {
 426                 DRM_ERROR("Invalid parameters");
 427                 return -EINVAL;
 428         }
 429
 430         config->bpp = 24;
 431         if (mdfld_get_panel_type(dev, pipe) == TC35876X)
 432                 config->lane_count = 4;
 433         else
 434                 config->lane_count = 2;
 435         config->channel_num = 0;
 436
 437         if (mdfld_get_panel_type(dev, pipe) == TMD_VID)
 438                 config->video_mode = MDFLD_DSI_VIDEO_NON_BURST_MODE_SYNC_PULSE;
 439         else if (mdfld_get_panel_type(dev, pipe) == TC35876X)
 440                 config->video_mode =
 441                                 MDFLD_DSI_VIDEO_NON_BURST_MODE_SYNC_EVENTS;
 442         else
 443                 config->video_mode = MDFLD_DSI_VIDEO_BURST_MODE;
 444
 445         return 0;
 446 }
 447
 448 int mdfld_dsi_panel_reset(int pipe)
 449 {
 450         unsigned gpio;
 451         int ret = 0;
 452
 453         switch (pipe) {
 454         case 0:
 455                 gpio = 128;
 456                 break;
 457         case 2:
 458                 gpio = 34;
 459                 break;
 460         default:
 461                 DRM_ERROR("Invalid output\n");
 462                 return -EINVAL;
 463         }
 464
 465         ret = gpio_request(gpio, "gfx");
 466         if (ret) {
 467                 DRM_ERROR("gpio_rqueset failed\n");
 468                 return ret;
 469         }
 470
 471         ret = gpio_direction_output(gpio, 1);
 472         if (ret) {
 473                 DRM_ERROR("gpio_direction_output failed\n");
 474                 goto gpio_error;
 475         }
 476
 477         gpio_get_value(128);
 478
 479 gpio_error:
 480         if (gpio_is_valid(gpio))
 481                 gpio_free(gpio);
 482
 483         return ret;
 484 }
 485
 486 /*
 487  * MIPI output init
 488  * @dev drm device
 489  * @pipe pipe number. 0 or 2
 490  * @config
 491  *
 492  * Do the initialization of a MIPI output, including create DRM mode objects
 493  * initialization of DSI output on @pipe
 494  */
 495 void mdfld_dsi_output_init(struct drm_device *dev,
 496                            int pipe,
 497                            const struct panel_funcs *p_vid_funcs)
 498 {
 499         struct mdfld_dsi_config *dsi_config;
 500         struct mdfld_dsi_connector *dsi_connector;
 501         struct drm_connector *connector;
 502         struct mdfld_dsi_encoder *encoder;
 503         struct drm_psb_private *dev_priv = dev->dev_private;
 504         struct panel_info dsi_panel_info;
 505         u32 width_mm, height_mm;
 506
 507         dev_dbg(dev->dev, "init DSI output on pipe %d\n", pipe);
 508
 509         if (!dev || ((pipe != 0) && (pipe != 2))) {
 510                 DRM_ERROR("Invalid parameter\n");
 511                 return;
 512         }
 513
 514         /*create a new connetor*/
 515         dsi_connector = kzalloc(sizeof(struct mdfld_dsi_connector), GFP_KERNEL);
 516         if (!dsi_connector) {
 517                 DRM_ERROR("No memory");
 518                 return;
 519         }
 520
 521         dsi_connector->pipe =  pipe;
 522
 523         dsi_config = kzalloc(sizeof(struct mdfld_dsi_config),
 524                         GFP_KERNEL);
 525         if (!dsi_config) {
 526                 DRM_ERROR("cannot allocate memory for DSI config\n");
 527                 goto dsi_init_err0;
 528         }
 529         mdfld_dsi_get_default_config(dev, dsi_config, pipe);
 530
 531         dsi_connector->private = dsi_config;
 532
 533         dsi_config->changed = 1;
 534         dsi_config->dev = dev;
 535
 536         dsi_config->fixed_mode = p_vid_funcs->get_config_mode(dev);
 537         if (p_vid_funcs->get_panel_info(dev, pipe, &dsi_panel_info))
 538                         goto dsi_init_err0;
 539
 540         width_mm = dsi_panel_info.width_mm;
 541         height_mm = dsi_panel_info.height_mm;
 542
 543         dsi_config->mode = dsi_config->fixed_mode;
 544         dsi_config->connector = dsi_connector;
 545
 546         if (!dsi_config->fixed_mode) {
 547                 DRM_ERROR("No pannel fixed mode was found\n");
 548                 goto dsi_init_err0;
 549         }
 550
 551         if (pipe && dev_priv->dsi_configs[0]) {
 552                 dsi_config->dvr_ic_inited = 0;
 553                 dev_priv->dsi_configs[1] = dsi_config;
 554         } else if (pipe == 0) {
 555                 dsi_config->dvr_ic_inited = 1;
 556                 dev_priv->dsi_configs[0] = dsi_config;
 557         } else {
 558                 DRM_ERROR("Trying to init MIPI1 before MIPI0\n");
 559                 goto dsi_init_err0;
 560         }
 561
 562
 563         connector = &dsi_connector->base.base;
 564         drm_connector_init(dev, connector, &mdfld_dsi_connector_funcs,
 565                                                 DRM_MODE_CONNECTOR_LVDS);
 566         drm_connector_helper_add(connector, &mdfld_dsi_connector_helper_funcs);
 567
 568         connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 569         connector->display_info.width_mm = width_mm;
 570         connector->display_info.height_mm = height_mm;
 571         connector->interlace_allowed = false;
 572         connector->doublescan_allowed = false;
 573
 574         /*attach properties*/
 575         drm_connector_attach_property(connector,
 576                                 dev->mode_config.scaling_mode_property,
 577                                 DRM_MODE_SCALE_FULLSCREEN);
 578         drm_connector_attach_property(connector,
 579                                 dev_priv->backlight_property,
 580                                 MDFLD_DSI_BRIGHTNESS_MAX_LEVEL);
 581
 582         /*init DSI package sender on this output*/
 583         if (mdfld_dsi_pkg_sender_init(dsi_connector, pipe)) {
 584                 DRM_ERROR("Package Sender initialization failed on pipe %d\n",
 585                                                                         pipe);
 586                 goto dsi_init_err0;
 587         }
 588
 589         encoder = mdfld_dsi_dpi_init(dev, dsi_connector, p_vid_funcs);
 590         if (!encoder) {
 591                 DRM_ERROR("Create DPI encoder failed\n");
 592                 goto dsi_init_err1;
 593         }
 594         encoder->private = dsi_config;
 595         dsi_config->encoder = encoder;
 596         encoder->base.type = (pipe == 0) ? INTEL_OUTPUT_MIPI :
 597                 INTEL_OUTPUT_MIPI2;
 598         drm_sysfs_connector_add(connector);
 599         return;
 600
 601         /*TODO: add code to destroy outputs on error*/
 602 dsi_init_err1:
 603         /*destroy sender*/
 604         mdfld_dsi_pkg_sender_destroy(dsi_connector->pkg_sender);
 605
 606         drm_connector_cleanup(connector);
 607
 608         kfree(dsi_config->fixed_mode);
 609         kfree(dsi_config);
 610 dsi_init_err0:
 611         kfree(dsi_connector);
 612 }