drivers/gpu/drm/sti/sti_dvo.c

   1 /*
   2  * Copyright (C) STMicroelectronics SA 2014
   3  * Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics.
   4  * License terms:  GNU General Public License (GPL), version 2
   5  */
   6
   7 #include <linux/clk.h>
   8 #include <linux/component.h>
   9 #include <linux/debugfs.h>
  10 #include <linux/module.h>
  11 #include <linux/of_gpio.h>
  12 #include <linux/platform_device.h>
  13
  14 #include <drm/drmP.h>
  15 #include <drm/drm_atomic_helper.h>
  16 #include <drm/drm_crtc_helper.h>
  17 #include <drm/drm_panel.h>
  18
  19 #include "sti_awg_utils.h"
  20 #include "sti_mixer.h"
  21
  22 /* DVO registers */
  23 #define DVO_AWG_DIGSYNC_CTRL      0x0000
  24 #define DVO_DOF_CFG               0x0004
  25 #define DVO_LUT_PROG_LOW          0x0008
  26 #define DVO_LUT_PROG_MID          0x000C
  27 #define DVO_LUT_PROG_HIGH         0x0010
  28 #define DVO_DIGSYNC_INSTR_I       0x0100
  29
  30 #define DVO_AWG_CTRL_EN           BIT(0)
  31 #define DVO_AWG_FRAME_BASED_SYNC  BIT(2)
  32
  33 #define DVO_DOF_EN_LOWBYTE        BIT(0)
  34 #define DVO_DOF_EN_MIDBYTE        BIT(1)
  35 #define DVO_DOF_EN_HIGHBYTE       BIT(2)
  36 #define DVO_DOF_EN                BIT(6)
  37 #define DVO_DOF_MOD_COUNT_SHIFT   8
  38
  39 #define DVO_LUT_ZERO              0
  40 #define DVO_LUT_Y_G               1
  41 #define DVO_LUT_Y_G_DEL           2
  42 #define DVO_LUT_CB_B              3
  43 #define DVO_LUT_CB_B_DEL          4
  44 #define DVO_LUT_CR_R              5
  45 #define DVO_LUT_CR_R_DEL          6
  46 #define DVO_LUT_HOLD              7
  47
  48 struct dvo_config {
  49         u32 flags;
  50         u32 lowbyte;
  51         u32 midbyte;
  52         u32 highbyte;
  53         int (*awg_fwgen_fct)(
  54                         struct awg_code_generation_params *fw_gen_params,
  55                         struct awg_timing *timing);
  56 };
  57
  58 static struct dvo_config rgb_24bit_de_cfg = {
  59         .flags         = (0L << DVO_DOF_MOD_COUNT_SHIFT),
  60         .lowbyte       = DVO_LUT_CR_R,
  61         .midbyte       = DVO_LUT_Y_G,
  62         .highbyte      = DVO_LUT_CB_B,
  63         .awg_fwgen_fct = sti_awg_generate_code_data_enable_mode,
  64 };
  65
  66 /**
  67  * STI digital video output structure
  68  *
  69  * @dev: driver device
  70  * @drm_dev: pointer to drm device
  71  * @mode: current display mode selected
  72  * @regs: dvo registers
  73  * @clk_pix: pixel clock for dvo
  74  * @clk: clock for dvo
  75  * @clk_main_parent: dvo parent clock if main path used
  76  * @clk_aux_parent: dvo parent clock if aux path used
  77  * @panel_node: panel node reference from device tree
  78  * @panel: reference to the panel connected to the dvo
  79  * @enabled: true if dvo is enabled else false
  80  * @encoder: drm_encoder it is bound
  81  */
  82 struct sti_dvo {
  83         struct device dev;
  84         struct drm_device *drm_dev;
  85         struct drm_display_mode mode;
  86         void __iomem *regs;
  87         struct clk *clk_pix;
  88         struct clk *clk;
  89         struct clk *clk_main_parent;
  90         struct clk *clk_aux_parent;
  91         struct device_node *panel_node;
  92         struct drm_panel *panel;
  93         struct dvo_config *config;
  94         bool enabled;
  95         struct drm_encoder *encoder;
  96         struct drm_bridge *bridge;
  97 };
  98
  99 struct sti_dvo_connector {
 100         struct drm_connector drm_connector;
 101         struct drm_encoder *encoder;
 102         struct sti_dvo *dvo;
 103 };
 104
 105 #define to_sti_dvo_connector(x) \
 106         container_of(x, struct sti_dvo_connector, drm_connector)
 107
 108 #define BLANKING_LEVEL 16
 109 int dvo_awg_generate_code(struct sti_dvo *dvo, u8 *ram_size, u32 *ram_code)
 110 {
 111         struct drm_display_mode *mode = &dvo->mode;
 112         struct dvo_config *config = dvo->config;
 113         struct awg_code_generation_params fw_gen_params;
 114         struct awg_timing timing;
 115
 116         fw_gen_params.ram_code = ram_code;
 117         fw_gen_params.instruction_offset = 0;
 118
 119         timing.total_lines = mode->vtotal;
 120         timing.active_lines = mode->vdisplay;
 121         timing.blanking_lines = mode->vsync_start - mode->vdisplay;
 122         timing.trailing_lines = mode->vtotal - mode->vsync_start;
 123         timing.total_pixels = mode->htotal;
 124         timing.active_pixels = mode->hdisplay;
 125         timing.blanking_pixels = mode->hsync_start - mode->hdisplay;
 126         timing.trailing_pixels = mode->htotal - mode->hsync_start;
 127         timing.blanking_level = BLANKING_LEVEL;
 128
 129         if (config->awg_fwgen_fct(&fw_gen_params, &timing)) {
 130                 DRM_ERROR("AWG firmware not properly generated\n");
 131                 return -EINVAL;
 132         }
 133
 134         *ram_size = fw_gen_params.instruction_offset;
 135
 136         return 0;
 137 }
 138
 139 /* Configure AWG, writing instructions
 140  *
 141  * @dvo: pointer to DVO structure
 142  * @awg_ram_code: pointer to AWG instructions table
 143  * @nb: nb of AWG instructions
 144  */
 145 static void dvo_awg_configure(struct sti_dvo *dvo, u32 *awg_ram_code, int nb)
 146 {
 147         int i;
 148
 149         DRM_DEBUG_DRIVER("\n");
 150
 151         for (i = 0; i < nb; i++)
 152                 writel(awg_ram_code[i],
 153                        dvo->regs + DVO_DIGSYNC_INSTR_I + i * 4);
 154         for (i = nb; i < AWG_MAX_INST; i++)
 155                 writel(0, dvo->regs + DVO_DIGSYNC_INSTR_I + i * 4);
 156
 157         writel(DVO_AWG_CTRL_EN, dvo->regs + DVO_AWG_DIGSYNC_CTRL);
 158 }
 159
 160 #define DBGFS_DUMP(reg) seq_printf(s, "\n  %-25s 0x%08X", #reg, \
 161                                    readl(dvo->regs + reg))
 162
 163 static void dvo_dbg_awg_microcode(struct seq_file *s, void __iomem *reg)
 164 {
 165         unsigned int i;
 166
 167         seq_puts(s, "\n\n");
 168         seq_puts(s, "  DVO AWG microcode:");
 169         for (i = 0; i < AWG_MAX_INST; i++) {
 170                 if (i % 8 == 0)
 171                         seq_printf(s, "\n  %04X:", i);
 172                 seq_printf(s, " %04X", readl(reg + i * 4));
 173         }
 174 }
 175
 176 static int dvo_dbg_show(struct seq_file *s, void *data)
 177 {
 178         struct drm_info_node *node = s->private;
 179         struct sti_dvo *dvo = (struct sti_dvo *)node->info_ent->data;
 180         struct drm_device *dev = node->minor->dev;
 181         int ret;
 182
 183         ret = mutex_lock_interruptible(&dev->struct_mutex);
 184         if (ret)
 185                 return ret;
 186
 187         seq_printf(s, "DVO: (vaddr = 0x%p)", dvo->regs);
 188         DBGFS_DUMP(DVO_AWG_DIGSYNC_CTRL);
 189         DBGFS_DUMP(DVO_DOF_CFG);
 190         DBGFS_DUMP(DVO_LUT_PROG_LOW);
 191         DBGFS_DUMP(DVO_LUT_PROG_MID);
 192         DBGFS_DUMP(DVO_LUT_PROG_HIGH);
 193         dvo_dbg_awg_microcode(s, dvo->regs + DVO_DIGSYNC_INSTR_I);
 194         seq_puts(s, "\n");
 195
 196         mutex_unlock(&dev->struct_mutex);
 197         return 0;
 198 }
 199
 200 static struct drm_info_list dvo_debugfs_files[] = {
 201         { "dvo", dvo_dbg_show, 0, NULL },
 202 };
 203
 204 static void dvo_debugfs_exit(struct sti_dvo *dvo, struct drm_minor *minor)
 205 {
 206         drm_debugfs_remove_files(dvo_debugfs_files,
 207                                  ARRAY_SIZE(dvo_debugfs_files),
 208                                  minor);
 209 }
 210
 211 static int dvo_debugfs_init(struct sti_dvo *dvo, struct drm_minor *minor)
 212 {
 213         unsigned int i;
 214
 215         for (i = 0; i < ARRAY_SIZE(dvo_debugfs_files); i++)
 216                 dvo_debugfs_files[i].data = dvo;
 217
 218         return drm_debugfs_create_files(dvo_debugfs_files,
 219                                         ARRAY_SIZE(dvo_debugfs_files),
 220                                         minor->debugfs_root, minor);
 221 }
 222
 223 static void sti_dvo_disable(struct drm_bridge *bridge)
 224 {
 225         struct sti_dvo *dvo = bridge->driver_private;
 226
 227         if (!dvo->enabled)
 228                 return;
 229
 230         DRM_DEBUG_DRIVER("\n");
 231
 232         if (dvo->config->awg_fwgen_fct)
 233                 writel(0x00000000, dvo->regs + DVO_AWG_DIGSYNC_CTRL);
 234
 235         writel(0x00000000, dvo->regs + DVO_DOF_CFG);
 236
 237         if (dvo->panel)
 238                 dvo->panel->funcs->disable(dvo->panel);
 239
 240         /* Disable/unprepare dvo clock */
 241         clk_disable_unprepare(dvo->clk_pix);
 242         clk_disable_unprepare(dvo->clk);
 243
 244         dvo->enabled = false;
 245 }
 246
 247 static void sti_dvo_pre_enable(struct drm_bridge *bridge)
 248 {
 249         struct sti_dvo *dvo = bridge->driver_private;
 250         struct dvo_config *config = dvo->config;
 251         u32 val;
 252
 253         DRM_DEBUG_DRIVER("\n");
 254
 255         if (dvo->enabled)
 256                 return;
 257
 258         /* Make sure DVO is disabled */
 259         writel(0x00000000, dvo->regs + DVO_DOF_CFG);
 260         writel(0x00000000, dvo->regs + DVO_AWG_DIGSYNC_CTRL);
 261
 262         if (config->awg_fwgen_fct) {
 263                 u8 nb_instr;
 264                 u32 awg_ram_code[AWG_MAX_INST];
 265                 /* Configure AWG */
 266                 if (!dvo_awg_generate_code(dvo, &nb_instr, awg_ram_code))
 267                         dvo_awg_configure(dvo, awg_ram_code, nb_instr);
 268                 else
 269                         return;
 270         }
 271
 272         /* Prepare/enable clocks */
 273         if (clk_prepare_enable(dvo->clk_pix))
 274                 DRM_ERROR("Failed to prepare/enable dvo_pix clk\n");
 275         if (clk_prepare_enable(dvo->clk))
 276                 DRM_ERROR("Failed to prepare/enable dvo clk\n");
 277
 278         if (dvo->panel)
 279                 dvo->panel->funcs->enable(dvo->panel);
 280
 281         /* Set LUT */
 282         writel(config->lowbyte,  dvo->regs + DVO_LUT_PROG_LOW);
 283         writel(config->midbyte,  dvo->regs + DVO_LUT_PROG_MID);
 284         writel(config->highbyte, dvo->regs + DVO_LUT_PROG_HIGH);
 285
 286         /* Digital output formatter config */
 287         val = (config->flags | DVO_DOF_EN);
 288         writel(val, dvo->regs + DVO_DOF_CFG);
 289
 290         dvo->enabled = true;
 291 }
 292
 293 static void sti_dvo_set_mode(struct drm_bridge *bridge,
 294                              struct drm_display_mode *mode,
 295                              struct drm_display_mode *adjusted_mode)
 296 {
 297         struct sti_dvo *dvo = bridge->driver_private;
 298         struct sti_mixer *mixer = to_sti_mixer(dvo->encoder->crtc);
 299         int rate = mode->clock * 1000;
 300         struct clk *clkp;
 301         int ret;
 302
 303         DRM_DEBUG_DRIVER("\n");
 304
 305         memcpy(&dvo->mode, mode, sizeof(struct drm_display_mode));
 306
 307         /* According to the path used (main or aux), the dvo clocks should
 308          * have a different parent clock. */
 309         if (mixer->id == STI_MIXER_MAIN)
 310                 clkp = dvo->clk_main_parent;
 311         else
 312                 clkp = dvo->clk_aux_parent;
 313
 314         if (clkp) {
 315                 clk_set_parent(dvo->clk_pix, clkp);
 316                 clk_set_parent(dvo->clk, clkp);
 317         }
 318
 319         /* DVO clocks = compositor clock */
 320         ret = clk_set_rate(dvo->clk_pix, rate);
 321         if (ret < 0) {
 322                 DRM_ERROR("Cannot set rate (%dHz) for dvo_pix clk\n", rate);
 323                 return;
 324         }
 325
 326         ret = clk_set_rate(dvo->clk, rate);
 327         if (ret < 0) {
 328                 DRM_ERROR("Cannot set rate (%dHz) for dvo clk\n", rate);
 329                 return;
 330         }
 331
 332         /* For now, we only support 24bit data enable (DE) synchro format */
 333         dvo->config = &rgb_24bit_de_cfg;
 334 }
 335
 336 static void sti_dvo_bridge_nope(struct drm_bridge *bridge)
 337 {
 338         /* do nothing */
 339 }
 340
 341 static const struct drm_bridge_funcs sti_dvo_bridge_funcs = {
 342         .pre_enable = sti_dvo_pre_enable,
 343         .enable = sti_dvo_bridge_nope,
 344         .disable = sti_dvo_disable,
 345         .post_disable = sti_dvo_bridge_nope,
 346         .mode_set = sti_dvo_set_mode,
 347 };
 348
 349 static int sti_dvo_connector_get_modes(struct drm_connector *connector)
 350 {
 351         struct sti_dvo_connector *dvo_connector
 352                 = to_sti_dvo_connector(connector);
 353         struct sti_dvo *dvo = dvo_connector->dvo;
 354
 355         if (dvo->panel)
 356                 return dvo->panel->funcs->get_modes(dvo->panel);
 357
 358         return 0;
 359 }
 360
 361 #define CLK_TOLERANCE_HZ 50
 362
 363 static int sti_dvo_connector_mode_valid(struct drm_connector *connector,
 364                                         struct drm_display_mode *mode)
 365 {
 366         int target = mode->clock * 1000;
 367         int target_min = target - CLK_TOLERANCE_HZ;
 368         int target_max = target + CLK_TOLERANCE_HZ;
 369         int result;
 370         struct sti_dvo_connector *dvo_connector
 371                 = to_sti_dvo_connector(connector);
 372         struct sti_dvo *dvo = dvo_connector->dvo;
 373
 374         result = clk_round_rate(dvo->clk_pix, target);
 375
 376         DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n",
 377                          target, result);
 378
 379         if ((result < target_min) || (result > target_max)) {
 380                 DRM_DEBUG_DRIVER("dvo pixclk=%d not supported\n", target);
 381                 return MODE_BAD;
 382         }
 383
 384         return MODE_OK;
 385 }
 386
 387 struct drm_encoder *sti_dvo_best_encoder(struct drm_connector *connector)
 388 {
 389         struct sti_dvo_connector *dvo_connector
 390                 = to_sti_dvo_connector(connector);
 391
 392         /* Best encoder is the one associated during connector creation */
 393         return dvo_connector->encoder;
 394 }
 395
 396 static const
 397 struct drm_connector_helper_funcs sti_dvo_connector_helper_funcs = {
 398         .get_modes = sti_dvo_connector_get_modes,
 399         .mode_valid = sti_dvo_connector_mode_valid,
 400         .best_encoder = sti_dvo_best_encoder,
 401 };
 402
 403 static enum drm_connector_status
 404 sti_dvo_connector_detect(struct drm_connector *connector, bool force)
 405 {
 406         struct sti_dvo_connector *dvo_connector
 407                 = to_sti_dvo_connector(connector);
 408         struct sti_dvo *dvo = dvo_connector->dvo;
 409
 410         DRM_DEBUG_DRIVER("\n");
 411
 412         if (!dvo->panel) {
 413                 dvo->panel = of_drm_find_panel(dvo->panel_node);
 414                 if (dvo->panel)
 415                         drm_panel_attach(dvo->panel, connector);
 416         }
 417
 418         if (dvo->panel)
 419                 return connector_status_connected;
 420
 421         return connector_status_disconnected;
 422 }
 423
 424 static void sti_dvo_connector_destroy(struct drm_connector *connector)
 425 {
 426         struct sti_dvo_connector *dvo_connector
 427                 = to_sti_dvo_connector(connector);
 428
 429         drm_connector_unregister(connector);
 430         drm_connector_cleanup(connector);
 431         kfree(dvo_connector);
 432 }
 433
 434 static const struct drm_connector_funcs sti_dvo_connector_funcs = {
 435         .dpms = drm_atomic_helper_connector_dpms,
 436         .fill_modes = drm_helper_probe_single_connector_modes,
 437         .detect = sti_dvo_connector_detect,
 438         .destroy = sti_dvo_connector_destroy,
 439         .reset = drm_atomic_helper_connector_reset,
 440         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 441         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 442 };
 443
 444 static struct drm_encoder *sti_dvo_find_encoder(struct drm_device *dev)
 445 {
 446         struct drm_encoder *encoder;
 447
 448         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 449                 if (encoder->encoder_type == DRM_MODE_ENCODER_LVDS)
 450                         return encoder;
 451         }
 452
 453         return NULL;
 454 }
 455
 456 static int sti_dvo_bind(struct device *dev, struct device *master, void *data)
 457 {
 458         struct sti_dvo *dvo = dev_get_drvdata(dev);
 459         struct drm_device *drm_dev = data;
 460         struct drm_encoder *encoder;
 461         struct sti_dvo_connector *connector;
 462         struct drm_connector *drm_connector;
 463         struct drm_bridge *bridge;
 464         int err;
 465
 466         /* Set the drm device handle */
 467         dvo->drm_dev = drm_dev;
 468
 469         encoder = sti_dvo_find_encoder(drm_dev);
 470         if (!encoder)
 471                 return -ENOMEM;
 472
 473         connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL);
 474         if (!connector)
 475                 return -ENOMEM;
 476
 477         connector->dvo = dvo;
 478
 479         bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL);
 480         if (!bridge)
 481                 return -ENOMEM;
 482
 483         bridge->driver_private = dvo;
 484         bridge->funcs = &sti_dvo_bridge_funcs;
 485         bridge->of_node = dvo->dev.of_node;
 486         err = drm_bridge_add(bridge);
 487         if (err) {
 488                 DRM_ERROR("Failed to add bridge\n");
 489                 return err;
 490         }
 491
 492         err = drm_bridge_attach(drm_dev, bridge);
 493         if (err) {
 494                 DRM_ERROR("Failed to attach bridge\n");
 495                 return err;
 496         }
 497
 498         dvo->bridge = bridge;
 499         encoder->bridge = bridge;
 500         connector->encoder = encoder;
 501         dvo->encoder = encoder;
 502
 503         drm_connector = (struct drm_connector *)connector;
 504
 505         drm_connector->polled = DRM_CONNECTOR_POLL_HPD;
 506
 507         drm_connector_init(drm_dev, drm_connector,
 508                            &sti_dvo_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
 509         drm_connector_helper_add(drm_connector,
 510                                  &sti_dvo_connector_helper_funcs);
 511
 512         err = drm_connector_register(drm_connector);
 513         if (err)
 514                 goto err_connector;
 515
 516         err = drm_mode_connector_attach_encoder(drm_connector, encoder);
 517         if (err) {
 518                 DRM_ERROR("Failed to attach a connector to a encoder\n");
 519                 goto err_sysfs;
 520         }
 521
 522         if (dvo_debugfs_init(dvo, drm_dev->primary))
 523                 DRM_ERROR("DVO debugfs setup failed\n");
 524
 525         return 0;
 526
 527 err_sysfs:
 528         drm_connector_unregister(drm_connector);
 529 err_connector:
 530         drm_bridge_remove(bridge);
 531         drm_connector_cleanup(drm_connector);
 532         return -EINVAL;
 533 }
 534
 535 static void sti_dvo_unbind(struct device *dev,
 536                            struct device *master, void *data)
 537 {
 538         struct sti_dvo *dvo = dev_get_drvdata(dev);
 539         struct drm_device *drm_dev = data;
 540
 541         dvo_debugfs_exit(dvo, drm_dev->primary);
 542
 543         drm_bridge_remove(dvo->bridge);
 544 }
 545
 546 static const struct component_ops sti_dvo_ops = {
 547         .bind = sti_dvo_bind,
 548         .unbind = sti_dvo_unbind,
 549 };
 550
 551 static int sti_dvo_probe(struct platform_device *pdev)
 552 {
 553         struct device *dev = &pdev->dev;
 554         struct sti_dvo *dvo;
 555         struct resource *res;
 556         struct device_node *np = dev->of_node;
 557
 558         DRM_INFO("%s\n", __func__);
 559
 560         dvo = devm_kzalloc(dev, sizeof(*dvo), GFP_KERNEL);
 561         if (!dvo) {
 562                 DRM_ERROR("Failed to allocate memory for DVO\n");
 563                 return -ENOMEM;
 564         }
 565
 566         dvo->dev = pdev->dev;
 567
 568         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dvo-reg");
 569         if (!res) {
 570                 DRM_ERROR("Invalid dvo resource\n");
 571                 return -ENOMEM;
 572         }
 573         dvo->regs = devm_ioremap_nocache(dev, res->start,
 574                         resource_size(res));
 575         if (!dvo->regs)
 576                 return -ENOMEM;
 577
 578         dvo->clk_pix = devm_clk_get(dev, "dvo_pix");
 579         if (IS_ERR(dvo->clk_pix)) {
 580                 DRM_ERROR("Cannot get dvo_pix clock\n");
 581                 return PTR_ERR(dvo->clk_pix);
 582         }
 583
 584         dvo->clk = devm_clk_get(dev, "dvo");
 585         if (IS_ERR(dvo->clk)) {
 586                 DRM_ERROR("Cannot get dvo clock\n");
 587                 return PTR_ERR(dvo->clk);
 588         }
 589
 590         dvo->clk_main_parent = devm_clk_get(dev, "main_parent");
 591         if (IS_ERR(dvo->clk_main_parent)) {
 592                 DRM_DEBUG_DRIVER("Cannot get main_parent clock\n");
 593                 dvo->clk_main_parent = NULL;
 594         }
 595
 596         dvo->clk_aux_parent = devm_clk_get(dev, "aux_parent");
 597         if (IS_ERR(dvo->clk_aux_parent)) {
 598                 DRM_DEBUG_DRIVER("Cannot get aux_parent clock\n");
 599                 dvo->clk_aux_parent = NULL;
 600         }
 601
 602         dvo->panel_node = of_parse_phandle(np, "sti,panel", 0);
 603         if (!dvo->panel_node)
 604                 DRM_ERROR("No panel associated to the dvo output\n");
 605
 606         platform_set_drvdata(pdev, dvo);
 607
 608         return component_add(&pdev->dev, &sti_dvo_ops);
 609 }
 610
 611 static int sti_dvo_remove(struct platform_device *pdev)
 612 {
 613         component_del(&pdev->dev, &sti_dvo_ops);
 614         return 0;
 615 }
 616
 617 static struct of_device_id dvo_of_match[] = {
 618         { .compatible = "st,stih407-dvo", },
 619         { /* end node */ }
 620 };
 621 MODULE_DEVICE_TABLE(of, dvo_of_match);
 622
 623 struct platform_driver sti_dvo_driver = {
 624         .driver = {
 625                 .name = "sti-dvo",
 626                 .owner = THIS_MODULE,
 627                 .of_match_table = dvo_of_match,
 628         },
 629         .probe = sti_dvo_probe,
 630         .remove = sti_dvo_remove,
 631 };
 632
 633 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
 634 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
 635 MODULE_LICENSE("GPL");