drivers/gpu/drm/imx/imx-tve.c

   1 /*
   2  * i.MX drm driver - Television Encoder (TVEv2)
   3  *
   4  * Copyright (C) 2013 Philipp Zabel, Pengutronix
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <linux/clk.h>
  17 #include <linux/clk-provider.h>
  18 #include <linux/component.h>
  19 #include <linux/module.h>
  20 #include <linux/i2c.h>
  21 #include <linux/regmap.h>
  22 #include <linux/regulator/consumer.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/videodev2.h>
  25 #include <drm/drmP.h>
  26 #include <drm/drm_fb_helper.h>
  27 #include <drm/drm_crtc_helper.h>
  28 #include <video/imx-ipu-v3.h>
  29
  30 #include "imx-drm.h"
  31
  32 #define TVE_COM_CONF_REG        0x00
  33 #define TVE_TVDAC0_CONT_REG     0x28
  34 #define TVE_TVDAC1_CONT_REG     0x2c
  35 #define TVE_TVDAC2_CONT_REG     0x30
  36 #define TVE_CD_CONT_REG         0x34
  37 #define TVE_INT_CONT_REG        0x64
  38 #define TVE_STAT_REG            0x68
  39 #define TVE_TST_MODE_REG        0x6c
  40 #define TVE_MV_CONT_REG         0xdc
  41
  42 /* TVE_COM_CONF_REG */
  43 #define TVE_SYNC_CH_2_EN        BIT(22)
  44 #define TVE_SYNC_CH_1_EN        BIT(21)
  45 #define TVE_SYNC_CH_0_EN        BIT(20)
  46 #define TVE_TV_OUT_MODE_MASK    (0x7 << 12)
  47 #define TVE_TV_OUT_DISABLE      (0x0 << 12)
  48 #define TVE_TV_OUT_CVBS_0       (0x1 << 12)
  49 #define TVE_TV_OUT_CVBS_2       (0x2 << 12)
  50 #define TVE_TV_OUT_CVBS_0_2     (0x3 << 12)
  51 #define TVE_TV_OUT_SVIDEO_0_1   (0x4 << 12)
  52 #define TVE_TV_OUT_SVIDEO_0_1_CVBS2_2   (0x5 << 12)
  53 #define TVE_TV_OUT_YPBPR        (0x6 << 12)
  54 #define TVE_TV_OUT_RGB          (0x7 << 12)
  55 #define TVE_TV_STAND_MASK       (0xf << 8)
  56 #define TVE_TV_STAND_HD_1080P30 (0xc << 8)
  57 #define TVE_P2I_CONV_EN         BIT(7)
  58 #define TVE_INP_VIDEO_FORM      BIT(6)
  59 #define TVE_INP_YCBCR_422       (0x0 << 6)
  60 #define TVE_INP_YCBCR_444       (0x1 << 6)
  61 #define TVE_DATA_SOURCE_MASK    (0x3 << 4)
  62 #define TVE_DATA_SOURCE_BUS1    (0x0 << 4)
  63 #define TVE_DATA_SOURCE_BUS2    (0x1 << 4)
  64 #define TVE_DATA_SOURCE_EXT     (0x2 << 4)
  65 #define TVE_DATA_SOURCE_TESTGEN (0x3 << 4)
  66 #define TVE_IPU_CLK_EN_OFS      3
  67 #define TVE_IPU_CLK_EN          BIT(3)
  68 #define TVE_DAC_SAMP_RATE_OFS   1
  69 #define TVE_DAC_SAMP_RATE_WIDTH 2
  70 #define TVE_DAC_SAMP_RATE_MASK  (0x3 << 1)
  71 #define TVE_DAC_FULL_RATE       (0x0 << 1)
  72 #define TVE_DAC_DIV2_RATE       (0x1 << 1)
  73 #define TVE_DAC_DIV4_RATE       (0x2 << 1)
  74 #define TVE_EN                  BIT(0)
  75
  76 /* TVE_TVDACx_CONT_REG */
  77 #define TVE_TVDAC_GAIN_MASK     (0x3f << 0)
  78
  79 /* TVE_CD_CONT_REG */
  80 #define TVE_CD_CH_2_SM_EN       BIT(22)
  81 #define TVE_CD_CH_1_SM_EN       BIT(21)
  82 #define TVE_CD_CH_0_SM_EN       BIT(20)
  83 #define TVE_CD_CH_2_LM_EN       BIT(18)
  84 #define TVE_CD_CH_1_LM_EN       BIT(17)
  85 #define TVE_CD_CH_0_LM_EN       BIT(16)
  86 #define TVE_CD_CH_2_REF_LVL     BIT(10)
  87 #define TVE_CD_CH_1_REF_LVL     BIT(9)
  88 #define TVE_CD_CH_0_REF_LVL     BIT(8)
  89 #define TVE_CD_EN               BIT(0)
  90
  91 /* TVE_INT_CONT_REG */
  92 #define TVE_FRAME_END_IEN       BIT(13)
  93 #define TVE_CD_MON_END_IEN      BIT(2)
  94 #define TVE_CD_SM_IEN           BIT(1)
  95 #define TVE_CD_LM_IEN           BIT(0)
  96
  97 /* TVE_TST_MODE_REG */
  98 #define TVE_TVDAC_TEST_MODE_MASK        (0x7 << 0)
  99
 100 #define con_to_tve(x) container_of(x, struct imx_tve, connector)
 101 #define enc_to_tve(x) container_of(x, struct imx_tve, encoder)
 102
 103 enum {
 104         TVE_MODE_TVOUT,
 105         TVE_MODE_VGA,
 106 };
 107
 108 struct imx_tve {
 109         struct drm_connector connector;
 110         struct drm_encoder encoder;
 111         struct device *dev;
 112         spinlock_t lock;        /* register lock */
 113         bool enabled;
 114         int mode;
 115
 116         struct regmap *regmap;
 117         struct regulator *dac_reg;
 118         struct i2c_adapter *ddc;
 119         struct clk *clk;
 120         struct clk *di_sel_clk;
 121         struct clk_hw clk_hw_di;
 122         struct clk *di_clk;
 123         int vsync_pin;
 124         int hsync_pin;
 125 };
 126
 127 static void tve_lock(void *__tve)
 128 __acquires(&tve->lock)
 129 {
 130         struct imx_tve *tve = __tve;
 131
 132         spin_lock(&tve->lock);
 133 }
 134
 135 static void tve_unlock(void *__tve)
 136 __releases(&tve->lock)
 137 {
 138         struct imx_tve *tve = __tve;
 139
 140         spin_unlock(&tve->lock);
 141 }
 142
 143 static void tve_enable(struct imx_tve *tve)
 144 {
 145         int ret;
 146
 147         if (!tve->enabled) {
 148                 tve->enabled = true;
 149                 clk_prepare_enable(tve->clk);
 150                 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
 151                                          TVE_IPU_CLK_EN | TVE_EN,
 152                                          TVE_IPU_CLK_EN | TVE_EN);
 153         }
 154
 155         /* clear interrupt status register */
 156         regmap_write(tve->regmap, TVE_STAT_REG, 0xffffffff);
 157
 158         /* cable detection irq disabled in VGA mode, enabled in TVOUT mode */
 159         if (tve->mode == TVE_MODE_VGA)
 160                 regmap_write(tve->regmap, TVE_INT_CONT_REG, 0);
 161         else
 162                 regmap_write(tve->regmap, TVE_INT_CONT_REG,
 163                              TVE_CD_SM_IEN |
 164                              TVE_CD_LM_IEN |
 165                              TVE_CD_MON_END_IEN);
 166 }
 167
 168 static void tve_disable(struct imx_tve *tve)
 169 {
 170         int ret;
 171
 172         if (tve->enabled) {
 173                 tve->enabled = false;
 174                 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
 175                                          TVE_IPU_CLK_EN | TVE_EN, 0);
 176                 clk_disable_unprepare(tve->clk);
 177         }
 178 }
 179
 180 static int tve_setup_tvout(struct imx_tve *tve)
 181 {
 182         return -ENOTSUPP;
 183 }
 184
 185 static int tve_setup_vga(struct imx_tve *tve)
 186 {
 187         unsigned int mask;
 188         unsigned int val;
 189         int ret;
 190
 191         /* set gain to (1 + 10/128) to provide 0.7V peak-to-peak amplitude */
 192         ret = regmap_update_bits(tve->regmap, TVE_TVDAC0_CONT_REG,
 193                                  TVE_TVDAC_GAIN_MASK, 0x0a);
 194         if (ret)
 195                 return ret;
 196
 197         ret = regmap_update_bits(tve->regmap, TVE_TVDAC1_CONT_REG,
 198                                  TVE_TVDAC_GAIN_MASK, 0x0a);
 199         if (ret)
 200                 return ret;
 201
 202         ret = regmap_update_bits(tve->regmap, TVE_TVDAC2_CONT_REG,
 203                                  TVE_TVDAC_GAIN_MASK, 0x0a);
 204         if (ret)
 205                 return ret;
 206
 207         /* set configuration register */
 208         mask = TVE_DATA_SOURCE_MASK | TVE_INP_VIDEO_FORM;
 209         val  = TVE_DATA_SOURCE_BUS2 | TVE_INP_YCBCR_444;
 210         mask |= TVE_TV_STAND_MASK       | TVE_P2I_CONV_EN;
 211         val  |= TVE_TV_STAND_HD_1080P30 | 0;
 212         mask |= TVE_TV_OUT_MODE_MASK | TVE_SYNC_CH_0_EN;
 213         val  |= TVE_TV_OUT_RGB       | TVE_SYNC_CH_0_EN;
 214         ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG, mask, val);
 215         if (ret)
 216                 return ret;
 217
 218         /* set test mode (as documented) */
 219         return regmap_update_bits(tve->regmap, TVE_TST_MODE_REG,
 220                                  TVE_TVDAC_TEST_MODE_MASK, 1);
 221 }
 222
 223 static enum drm_connector_status imx_tve_connector_detect(
 224                                 struct drm_connector *connector, bool force)
 225 {
 226         return connector_status_connected;
 227 }
 228
 229 static int imx_tve_connector_get_modes(struct drm_connector *connector)
 230 {
 231         struct imx_tve *tve = con_to_tve(connector);
 232         struct edid *edid;
 233         int ret = 0;
 234
 235         if (!tve->ddc)
 236                 return 0;
 237
 238         edid = drm_get_edid(connector, tve->ddc);
 239         if (edid) {
 240                 drm_mode_connector_update_edid_property(connector, edid);
 241                 ret = drm_add_edid_modes(connector, edid);
 242                 kfree(edid);
 243         }
 244
 245         return ret;
 246 }
 247
 248 static int imx_tve_connector_mode_valid(struct drm_connector *connector,
 249                                         struct drm_display_mode *mode)
 250 {
 251         struct imx_tve *tve = con_to_tve(connector);
 252         unsigned long rate;
 253
 254         /* pixel clock with 2x oversampling */
 255         rate = clk_round_rate(tve->clk, 2000UL * mode->clock) / 2000;
 256         if (rate == mode->clock)
 257                 return MODE_OK;
 258
 259         /* pixel clock without oversampling */
 260         rate = clk_round_rate(tve->clk, 1000UL * mode->clock) / 1000;
 261         if (rate == mode->clock)
 262                 return MODE_OK;
 263
 264         dev_warn(tve->dev, "ignoring mode %dx%d\n",
 265                  mode->hdisplay, mode->vdisplay);
 266
 267         return MODE_BAD;
 268 }
 269
 270 static struct drm_encoder *imx_tve_connector_best_encoder(
 271                 struct drm_connector *connector)
 272 {
 273         struct imx_tve *tve = con_to_tve(connector);
 274
 275         return &tve->encoder;
 276 }
 277
 278 static void imx_tve_encoder_dpms(struct drm_encoder *encoder, int mode)
 279 {
 280         struct imx_tve *tve = enc_to_tve(encoder);
 281         int ret;
 282
 283         ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
 284                                  TVE_TV_OUT_MODE_MASK, TVE_TV_OUT_DISABLE);
 285         if (ret < 0)
 286                 dev_err(tve->dev, "failed to disable TVOUT: %d\n", ret);
 287 }
 288
 289 static void imx_tve_encoder_prepare(struct drm_encoder *encoder)
 290 {
 291         struct imx_tve *tve = enc_to_tve(encoder);
 292
 293         tve_disable(tve);
 294
 295         switch (tve->mode) {
 296         case TVE_MODE_VGA:
 297                 imx_drm_set_bus_config(encoder, MEDIA_BUS_FMT_GBR888_1X24,
 298                                        tve->hsync_pin, tve->vsync_pin,
 299                                        DRM_BUS_FLAG_DE_HIGH |
 300                                        DRM_BUS_FLAG_PIXDATA_NEGEDGE);
 301                 break;
 302         case TVE_MODE_TVOUT:
 303                 imx_drm_set_bus_format(encoder, MEDIA_BUS_FMT_YUV8_1X24);
 304                 break;
 305         }
 306 }
 307
 308 static void imx_tve_encoder_mode_set(struct drm_encoder *encoder,
 309                                      struct drm_display_mode *orig_mode,
 310                                      struct drm_display_mode *mode)
 311 {
 312         struct imx_tve *tve = enc_to_tve(encoder);
 313         unsigned long rounded_rate;
 314         unsigned long rate;
 315         int div = 1;
 316         int ret;
 317
 318         /*
 319          * FIXME
 320          * we should try 4k * mode->clock first,
 321          * and enable 4x oversampling for lower resolutions
 322          */
 323         rate = 2000UL * mode->clock;
 324         clk_set_rate(tve->clk, rate);
 325         rounded_rate = clk_get_rate(tve->clk);
 326         if (rounded_rate >= rate)
 327                 div = 2;
 328         clk_set_rate(tve->di_clk, rounded_rate / div);
 329
 330         ret = clk_set_parent(tve->di_sel_clk, tve->di_clk);
 331         if (ret < 0) {
 332                 dev_err(tve->dev, "failed to set di_sel parent to tve_di: %d\n",
 333                         ret);
 334         }
 335
 336         if (tve->mode == TVE_MODE_VGA)
 337                 ret = tve_setup_vga(tve);
 338         else
 339                 ret = tve_setup_tvout(tve);
 340         if (ret)
 341                 dev_err(tve->dev, "failed to set configuration: %d\n", ret);
 342 }
 343
 344 static void imx_tve_encoder_commit(struct drm_encoder *encoder)
 345 {
 346         struct imx_tve *tve = enc_to_tve(encoder);
 347
 348         tve_enable(tve);
 349 }
 350
 351 static void imx_tve_encoder_disable(struct drm_encoder *encoder)
 352 {
 353         struct imx_tve *tve = enc_to_tve(encoder);
 354
 355         tve_disable(tve);
 356 }
 357
 358 static const struct drm_connector_funcs imx_tve_connector_funcs = {
 359         .dpms = drm_helper_connector_dpms,
 360         .fill_modes = drm_helper_probe_single_connector_modes,
 361         .detect = imx_tve_connector_detect,
 362         .destroy = imx_drm_connector_destroy,
 363 };
 364
 365 static const struct drm_connector_helper_funcs imx_tve_connector_helper_funcs = {
 366         .get_modes = imx_tve_connector_get_modes,
 367         .best_encoder = imx_tve_connector_best_encoder,
 368         .mode_valid = imx_tve_connector_mode_valid,
 369 };
 370
 371 static const struct drm_encoder_funcs imx_tve_encoder_funcs = {
 372         .destroy = imx_drm_encoder_destroy,
 373 };
 374
 375 static const struct drm_encoder_helper_funcs imx_tve_encoder_helper_funcs = {
 376         .dpms = imx_tve_encoder_dpms,
 377         .prepare = imx_tve_encoder_prepare,
 378         .mode_set = imx_tve_encoder_mode_set,
 379         .commit = imx_tve_encoder_commit,
 380         .disable = imx_tve_encoder_disable,
 381 };
 382
 383 static irqreturn_t imx_tve_irq_handler(int irq, void *data)
 384 {
 385         struct imx_tve *tve = data;
 386         unsigned int val;
 387
 388         regmap_read(tve->regmap, TVE_STAT_REG, &val);
 389
 390         /* clear interrupt status register */
 391         regmap_write(tve->regmap, TVE_STAT_REG, 0xffffffff);
 392
 393         return IRQ_HANDLED;
 394 }
 395
 396 static unsigned long clk_tve_di_recalc_rate(struct clk_hw *hw,
 397                                             unsigned long parent_rate)
 398 {
 399         struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di);
 400         unsigned int val;
 401         int ret;
 402
 403         ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val);
 404         if (ret < 0)
 405                 return 0;
 406
 407         switch (val & TVE_DAC_SAMP_RATE_MASK) {
 408         case TVE_DAC_DIV4_RATE:
 409                 return parent_rate / 4;
 410         case TVE_DAC_DIV2_RATE:
 411                 return parent_rate / 2;
 412         case TVE_DAC_FULL_RATE:
 413         default:
 414                 return parent_rate;
 415         }
 416
 417         return 0;
 418 }
 419
 420 static long clk_tve_di_round_rate(struct clk_hw *hw, unsigned long rate,
 421                                   unsigned long *prate)
 422 {
 423         unsigned long div;
 424
 425         div = *prate / rate;
 426         if (div >= 4)
 427                 return *prate / 4;
 428         else if (div >= 2)
 429                 return *prate / 2;
 430         return *prate;
 431 }
 432
 433 static int clk_tve_di_set_rate(struct clk_hw *hw, unsigned long rate,
 434                                unsigned long parent_rate)
 435 {
 436         struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di);
 437         unsigned long div;
 438         u32 val;
 439         int ret;
 440
 441         div = parent_rate / rate;
 442         if (div >= 4)
 443                 val = TVE_DAC_DIV4_RATE;
 444         else if (div >= 2)
 445                 val = TVE_DAC_DIV2_RATE;
 446         else
 447                 val = TVE_DAC_FULL_RATE;
 448
 449         ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
 450                                  TVE_DAC_SAMP_RATE_MASK, val);
 451
 452         if (ret < 0) {
 453                 dev_err(tve->dev, "failed to set divider: %d\n", ret);
 454                 return ret;
 455         }
 456
 457         return 0;
 458 }
 459
 460 static struct clk_ops clk_tve_di_ops = {
 461         .round_rate = clk_tve_di_round_rate,
 462         .set_rate = clk_tve_di_set_rate,
 463         .recalc_rate = clk_tve_di_recalc_rate,
 464 };
 465
 466 static int tve_clk_init(struct imx_tve *tve, void __iomem *base)
 467 {
 468         const char *tve_di_parent[1];
 469         struct clk_init_data init = {
 470                 .name = "tve_di",
 471                 .ops = &clk_tve_di_ops,
 472                 .num_parents = 1,
 473                 .flags = 0,
 474         };
 475
 476         tve_di_parent[0] = __clk_get_name(tve->clk);
 477         init.parent_names = (const char **)&tve_di_parent;
 478
 479         tve->clk_hw_di.init = &init;
 480         tve->di_clk = clk_register(tve->dev, &tve->clk_hw_di);
 481         if (IS_ERR(tve->di_clk)) {
 482                 dev_err(tve->dev, "failed to register TVE output clock: %ld\n",
 483                         PTR_ERR(tve->di_clk));
 484                 return PTR_ERR(tve->di_clk);
 485         }
 486
 487         return 0;
 488 }
 489
 490 static int imx_tve_register(struct drm_device *drm, struct imx_tve *tve)
 491 {
 492         int encoder_type;
 493         int ret;
 494
 495         encoder_type = tve->mode == TVE_MODE_VGA ?
 496                                 DRM_MODE_ENCODER_DAC : DRM_MODE_ENCODER_TVDAC;
 497
 498         ret = imx_drm_encoder_parse_of(drm, &tve->encoder,
 499                                        tve->dev->of_node);
 500         if (ret)
 501                 return ret;
 502
 503         drm_encoder_helper_add(&tve->encoder, &imx_tve_encoder_helper_funcs);
 504         drm_encoder_init(drm, &tve->encoder, &imx_tve_encoder_funcs,
 505                          encoder_type, NULL);
 506
 507         drm_connector_helper_add(&tve->connector,
 508                         &imx_tve_connector_helper_funcs);
 509         drm_connector_init(drm, &tve->connector, &imx_tve_connector_funcs,
 510                            DRM_MODE_CONNECTOR_VGA);
 511
 512         drm_mode_connector_attach_encoder(&tve->connector, &tve->encoder);
 513
 514         return 0;
 515 }
 516
 517 static bool imx_tve_readable_reg(struct device *dev, unsigned int reg)
 518 {
 519         return (reg % 4 == 0) && (reg <= 0xdc);
 520 }
 521
 522 static struct regmap_config tve_regmap_config = {
 523         .reg_bits = 32,
 524         .val_bits = 32,
 525         .reg_stride = 4,
 526
 527         .readable_reg = imx_tve_readable_reg,
 528
 529         .lock = tve_lock,
 530         .unlock = tve_unlock,
 531
 532         .max_register = 0xdc,
 533 };
 534
 535 static const char * const imx_tve_modes[] = {
 536         [TVE_MODE_TVOUT]  = "tvout",
 537         [TVE_MODE_VGA] = "vga",
 538 };
 539
 540 static const int of_get_tve_mode(struct device_node *np)
 541 {
 542         const char *bm;
 543         int ret, i;
 544
 545         ret = of_property_read_string(np, "fsl,tve-mode", &bm);
 546         if (ret < 0)
 547                 return ret;
 548
 549         for (i = 0; i < ARRAY_SIZE(imx_tve_modes); i++)
 550                 if (!strcasecmp(bm, imx_tve_modes[i]))
 551                         return i;
 552
 553         return -EINVAL;
 554 }
 555
 556 static int imx_tve_bind(struct device *dev, struct device *master, void *data)
 557 {
 558         struct platform_device *pdev = to_platform_device(dev);
 559         struct drm_device *drm = data;
 560         struct device_node *np = dev->of_node;
 561         struct device_node *ddc_node;
 562         struct imx_tve *tve;
 563         struct resource *res;
 564         void __iomem *base;
 565         unsigned int val;
 566         int irq;
 567         int ret;
 568
 569         tve = devm_kzalloc(dev, sizeof(*tve), GFP_KERNEL);
 570         if (!tve)
 571                 return -ENOMEM;
 572
 573         tve->dev = dev;
 574         spin_lock_init(&tve->lock);
 575
 576         ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
 577         if (ddc_node) {
 578                 tve->ddc = of_find_i2c_adapter_by_node(ddc_node);
 579                 of_node_put(ddc_node);
 580         }
 581
 582         tve->mode = of_get_tve_mode(np);
 583         if (tve->mode != TVE_MODE_VGA) {
 584                 dev_err(dev, "only VGA mode supported, currently\n");
 585                 return -EINVAL;
 586         }
 587
 588         if (tve->mode == TVE_MODE_VGA) {
 589                 ret = of_property_read_u32(np, "fsl,hsync-pin",
 590                                            &tve->hsync_pin);
 591
 592                 if (ret < 0) {
 593                         dev_err(dev, "failed to get vsync pin\n");
 594                         return ret;
 595                 }
 596
 597                 ret |= of_property_read_u32(np, "fsl,vsync-pin",
 598                                             &tve->vsync_pin);
 599
 600                 if (ret < 0) {
 601                         dev_err(dev, "failed to get vsync pin\n");
 602                         return ret;
 603                 }
 604         }
 605
 606         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 607         base = devm_ioremap_resource(dev, res);
 608         if (IS_ERR(base))
 609                 return PTR_ERR(base);
 610
 611         tve_regmap_config.lock_arg = tve;
 612         tve->regmap = devm_regmap_init_mmio_clk(dev, "tve", base,
 613                                                 &tve_regmap_config);
 614         if (IS_ERR(tve->regmap)) {
 615                 dev_err(dev, "failed to init regmap: %ld\n",
 616                         PTR_ERR(tve->regmap));
 617                 return PTR_ERR(tve->regmap);
 618         }
 619
 620         irq = platform_get_irq(pdev, 0);
 621         if (irq < 0) {
 622                 dev_err(dev, "failed to get irq\n");
 623                 return irq;
 624         }
 625
 626         ret = devm_request_threaded_irq(dev, irq, NULL,
 627                                         imx_tve_irq_handler, IRQF_ONESHOT,
 628                                         "imx-tve", tve);
 629         if (ret < 0) {
 630                 dev_err(dev, "failed to request irq: %d\n", ret);
 631                 return ret;
 632         }
 633
 634         tve->dac_reg = devm_regulator_get(dev, "dac");
 635         if (!IS_ERR(tve->dac_reg)) {
 636                 regulator_set_voltage(tve->dac_reg, 2750000, 2750000);
 637                 ret = regulator_enable(tve->dac_reg);
 638                 if (ret)
 639                         return ret;
 640         }
 641
 642         tve->clk = devm_clk_get(dev, "tve");
 643         if (IS_ERR(tve->clk)) {
 644                 dev_err(dev, "failed to get high speed tve clock: %ld\n",
 645                         PTR_ERR(tve->clk));
 646                 return PTR_ERR(tve->clk);
 647         }
 648
 649         /* this is the IPU DI clock input selector, can be parented to tve_di */
 650         tve->di_sel_clk = devm_clk_get(dev, "di_sel");
 651         if (IS_ERR(tve->di_sel_clk)) {
 652                 dev_err(dev, "failed to get ipu di mux clock: %ld\n",
 653                         PTR_ERR(tve->di_sel_clk));
 654                 return PTR_ERR(tve->di_sel_clk);
 655         }
 656
 657         ret = tve_clk_init(tve, base);
 658         if (ret < 0)
 659                 return ret;
 660
 661         ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val);
 662         if (ret < 0) {
 663                 dev_err(dev, "failed to read configuration register: %d\n",
 664                         ret);
 665                 return ret;
 666         }
 667         if (val != 0x00100000) {
 668                 dev_err(dev, "configuration register default value indicates this is not a TVEv2\n");
 669                 return -ENODEV;
 670         }
 671
 672         /* disable cable detection for VGA mode */
 673         ret = regmap_write(tve->regmap, TVE_CD_CONT_REG, 0);
 674         if (ret)
 675                 return ret;
 676
 677         ret = imx_tve_register(drm, tve);
 678         if (ret)
 679                 return ret;
 680
 681         dev_set_drvdata(dev, tve);
 682
 683         return 0;
 684 }
 685
 686 static void imx_tve_unbind(struct device *dev, struct device *master,
 687         void *data)
 688 {
 689         struct imx_tve *tve = dev_get_drvdata(dev);
 690
 691         tve->connector.funcs->destroy(&tve->connector);
 692         tve->encoder.funcs->destroy(&tve->encoder);
 693
 694         if (!IS_ERR(tve->dac_reg))
 695                 regulator_disable(tve->dac_reg);
 696 }
 697
 698 static const struct component_ops imx_tve_ops = {
 699         .bind   = imx_tve_bind,
 700         .unbind = imx_tve_unbind,
 701 };
 702
 703 static int imx_tve_probe(struct platform_device *pdev)
 704 {
 705         return component_add(&pdev->dev, &imx_tve_ops);
 706 }
 707
 708 static int imx_tve_remove(struct platform_device *pdev)
 709 {
 710         component_del(&pdev->dev, &imx_tve_ops);
 711         return 0;
 712 }
 713
 714 static const struct of_device_id imx_tve_dt_ids[] = {
 715         { .compatible = "fsl,imx53-tve", },
 716         { /* sentinel */ }
 717 };
 718 MODULE_DEVICE_TABLE(of, imx_tve_dt_ids);
 719
 720 static struct platform_driver imx_tve_driver = {
 721         .probe          = imx_tve_probe,
 722         .remove         = imx_tve_remove,
 723         .driver         = {
 724                 .of_match_table = imx_tve_dt_ids,
 725                 .name   = "imx-tve",
 726         },
 727 };
 728
 729 module_platform_driver(imx_tve_driver);
 730
 731 MODULE_DESCRIPTION("i.MX Television Encoder driver");
 732 MODULE_AUTHOR("Philipp Zabel, Pengutronix");
 733 MODULE_LICENSE("GPL");
 734 MODULE_ALIAS("platform:imx-tve");