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_format_pins(encoder, MEDIA_BUS_FMT_GBR888_1X24,
 298                                             tve->hsync_pin, tve->vsync_pin);
 299                 break;
 300         case TVE_MODE_TVOUT:
 301                 imx_drm_set_bus_format(encoder, MEDIA_BUS_FMT_YUV8_1X24);
 302                 break;
 303         }
 304 }
 305
 306 static void imx_tve_encoder_mode_set(struct drm_encoder *encoder,
 307                                      struct drm_display_mode *orig_mode,
 308                                      struct drm_display_mode *mode)
 309 {
 310         struct imx_tve *tve = enc_to_tve(encoder);
 311         unsigned long rounded_rate;
 312         unsigned long rate;
 313         int div = 1;
 314         int ret;
 315
 316         /*
 317          * FIXME
 318          * we should try 4k * mode->clock first,
 319          * and enable 4x oversampling for lower resolutions
 320          */
 321         rate = 2000UL * mode->clock;
 322         clk_set_rate(tve->clk, rate);
 323         rounded_rate = clk_get_rate(tve->clk);
 324         if (rounded_rate >= rate)
 325                 div = 2;
 326         clk_set_rate(tve->di_clk, rounded_rate / div);
 327
 328         ret = clk_set_parent(tve->di_sel_clk, tve->di_clk);
 329         if (ret < 0) {
 330                 dev_err(tve->dev, "failed to set di_sel parent to tve_di: %d\n",
 331                         ret);
 332         }
 333
 334         if (tve->mode == TVE_MODE_VGA)
 335                 ret = tve_setup_vga(tve);
 336         else
 337                 ret = tve_setup_tvout(tve);
 338         if (ret)
 339                 dev_err(tve->dev, "failed to set configuration: %d\n", ret);
 340 }
 341
 342 static void imx_tve_encoder_commit(struct drm_encoder *encoder)
 343 {
 344         struct imx_tve *tve = enc_to_tve(encoder);
 345
 346         tve_enable(tve);
 347 }
 348
 349 static void imx_tve_encoder_disable(struct drm_encoder *encoder)
 350 {
 351         struct imx_tve *tve = enc_to_tve(encoder);
 352
 353         tve_disable(tve);
 354 }
 355
 356 static const struct drm_connector_funcs imx_tve_connector_funcs = {
 357         .dpms = drm_helper_connector_dpms,
 358         .fill_modes = drm_helper_probe_single_connector_modes,
 359         .detect = imx_tve_connector_detect,
 360         .destroy = imx_drm_connector_destroy,
 361 };
 362
 363 static const struct drm_connector_helper_funcs imx_tve_connector_helper_funcs = {
 364         .get_modes = imx_tve_connector_get_modes,
 365         .best_encoder = imx_tve_connector_best_encoder,
 366         .mode_valid = imx_tve_connector_mode_valid,
 367 };
 368
 369 static const struct drm_encoder_funcs imx_tve_encoder_funcs = {
 370         .destroy = imx_drm_encoder_destroy,
 371 };
 372
 373 static const struct drm_encoder_helper_funcs imx_tve_encoder_helper_funcs = {
 374         .dpms = imx_tve_encoder_dpms,
 375         .prepare = imx_tve_encoder_prepare,
 376         .mode_set = imx_tve_encoder_mode_set,
 377         .commit = imx_tve_encoder_commit,
 378         .disable = imx_tve_encoder_disable,
 379 };
 380
 381 static irqreturn_t imx_tve_irq_handler(int irq, void *data)
 382 {
 383         struct imx_tve *tve = data;
 384         unsigned int val;
 385
 386         regmap_read(tve->regmap, TVE_STAT_REG, &val);
 387
 388         /* clear interrupt status register */
 389         regmap_write(tve->regmap, TVE_STAT_REG, 0xffffffff);
 390
 391         return IRQ_HANDLED;
 392 }
 393
 394 static unsigned long clk_tve_di_recalc_rate(struct clk_hw *hw,
 395                                             unsigned long parent_rate)
 396 {
 397         struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di);
 398         unsigned int val;
 399         int ret;
 400
 401         ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val);
 402         if (ret < 0)
 403                 return 0;
 404
 405         switch (val & TVE_DAC_SAMP_RATE_MASK) {
 406         case TVE_DAC_DIV4_RATE:
 407                 return parent_rate / 4;
 408         case TVE_DAC_DIV2_RATE:
 409                 return parent_rate / 2;
 410         case TVE_DAC_FULL_RATE:
 411         default:
 412                 return parent_rate;
 413         }
 414
 415         return 0;
 416 }
 417
 418 static long clk_tve_di_round_rate(struct clk_hw *hw, unsigned long rate,
 419                                   unsigned long *prate)
 420 {
 421         unsigned long div;
 422
 423         div = *prate / rate;
 424         if (div >= 4)
 425                 return *prate / 4;
 426         else if (div >= 2)
 427                 return *prate / 2;
 428         return *prate;
 429 }
 430
 431 static int clk_tve_di_set_rate(struct clk_hw *hw, unsigned long rate,
 432                                unsigned long parent_rate)
 433 {
 434         struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di);
 435         unsigned long div;
 436         u32 val;
 437         int ret;
 438
 439         div = parent_rate / rate;
 440         if (div >= 4)
 441                 val = TVE_DAC_DIV4_RATE;
 442         else if (div >= 2)
 443                 val = TVE_DAC_DIV2_RATE;
 444         else
 445                 val = TVE_DAC_FULL_RATE;
 446
 447         ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
 448                                  TVE_DAC_SAMP_RATE_MASK, val);
 449
 450         if (ret < 0) {
 451                 dev_err(tve->dev, "failed to set divider: %d\n", ret);
 452                 return ret;
 453         }
 454
 455         return 0;
 456 }
 457
 458 static struct clk_ops clk_tve_di_ops = {
 459         .round_rate = clk_tve_di_round_rate,
 460         .set_rate = clk_tve_di_set_rate,
 461         .recalc_rate = clk_tve_di_recalc_rate,
 462 };
 463
 464 static int tve_clk_init(struct imx_tve *tve, void __iomem *base)
 465 {
 466         const char *tve_di_parent[1];
 467         struct clk_init_data init = {
 468                 .name = "tve_di",
 469                 .ops = &clk_tve_di_ops,
 470                 .num_parents = 1,
 471                 .flags = 0,
 472         };
 473
 474         tve_di_parent[0] = __clk_get_name(tve->clk);
 475         init.parent_names = (const char **)&tve_di_parent;
 476
 477         tve->clk_hw_di.init = &init;
 478         tve->di_clk = clk_register(tve->dev, &tve->clk_hw_di);
 479         if (IS_ERR(tve->di_clk)) {
 480                 dev_err(tve->dev, "failed to register TVE output clock: %ld\n",
 481                         PTR_ERR(tve->di_clk));
 482                 return PTR_ERR(tve->di_clk);
 483         }
 484
 485         return 0;
 486 }
 487
 488 static int imx_tve_register(struct drm_device *drm, struct imx_tve *tve)
 489 {
 490         int encoder_type;
 491         int ret;
 492
 493         encoder_type = tve->mode == TVE_MODE_VGA ?
 494                                 DRM_MODE_ENCODER_DAC : DRM_MODE_ENCODER_TVDAC;
 495
 496         ret = imx_drm_encoder_parse_of(drm, &tve->encoder,
 497                                        tve->dev->of_node);
 498         if (ret)
 499                 return ret;
 500
 501         drm_encoder_helper_add(&tve->encoder, &imx_tve_encoder_helper_funcs);
 502         drm_encoder_init(drm, &tve->encoder, &imx_tve_encoder_funcs,
 503                          encoder_type, NULL);
 504
 505         drm_connector_helper_add(&tve->connector,
 506                         &imx_tve_connector_helper_funcs);
 507         drm_connector_init(drm, &tve->connector, &imx_tve_connector_funcs,
 508                            DRM_MODE_CONNECTOR_VGA);
 509
 510         drm_mode_connector_attach_encoder(&tve->connector, &tve->encoder);
 511
 512         return 0;
 513 }
 514
 515 static bool imx_tve_readable_reg(struct device *dev, unsigned int reg)
 516 {
 517         return (reg % 4 == 0) && (reg <= 0xdc);
 518 }
 519
 520 static struct regmap_config tve_regmap_config = {
 521         .reg_bits = 32,
 522         .val_bits = 32,
 523         .reg_stride = 4,
 524
 525         .readable_reg = imx_tve_readable_reg,
 526
 527         .lock = tve_lock,
 528         .unlock = tve_unlock,
 529
 530         .max_register = 0xdc,
 531 };
 532
 533 static const char * const imx_tve_modes[] = {
 534         [TVE_MODE_TVOUT]  = "tvout",
 535         [TVE_MODE_VGA] = "vga",
 536 };
 537
 538 static const int of_get_tve_mode(struct device_node *np)
 539 {
 540         const char *bm;
 541         int ret, i;
 542
 543         ret = of_property_read_string(np, "fsl,tve-mode", &bm);
 544         if (ret < 0)
 545                 return ret;
 546
 547         for (i = 0; i < ARRAY_SIZE(imx_tve_modes); i++)
 548                 if (!strcasecmp(bm, imx_tve_modes[i]))
 549                         return i;
 550
 551         return -EINVAL;
 552 }
 553
 554 static int imx_tve_bind(struct device *dev, struct device *master, void *data)
 555 {
 556         struct platform_device *pdev = to_platform_device(dev);
 557         struct drm_device *drm = data;
 558         struct device_node *np = dev->of_node;
 559         struct device_node *ddc_node;
 560         struct imx_tve *tve;
 561         struct resource *res;
 562         void __iomem *base;
 563         unsigned int val;
 564         int irq;
 565         int ret;
 566
 567         tve = devm_kzalloc(dev, sizeof(*tve), GFP_KERNEL);
 568         if (!tve)
 569                 return -ENOMEM;
 570
 571         tve->dev = dev;
 572         spin_lock_init(&tve->lock);
 573
 574         ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
 575         if (ddc_node) {
 576                 tve->ddc = of_find_i2c_adapter_by_node(ddc_node);
 577                 of_node_put(ddc_node);
 578         }
 579
 580         tve->mode = of_get_tve_mode(np);
 581         if (tve->mode != TVE_MODE_VGA) {
 582                 dev_err(dev, "only VGA mode supported, currently\n");
 583                 return -EINVAL;
 584         }
 585
 586         if (tve->mode == TVE_MODE_VGA) {
 587                 ret = of_property_read_u32(np, "fsl,hsync-pin",
 588                                            &tve->hsync_pin);
 589
 590                 if (ret < 0) {
 591                         dev_err(dev, "failed to get vsync pin\n");
 592                         return ret;
 593                 }
 594
 595                 ret |= of_property_read_u32(np, "fsl,vsync-pin",
 596                                             &tve->vsync_pin);
 597
 598                 if (ret < 0) {
 599                         dev_err(dev, "failed to get vsync pin\n");
 600                         return ret;
 601                 }
 602         }
 603
 604         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 605         base = devm_ioremap_resource(dev, res);
 606         if (IS_ERR(base))
 607                 return PTR_ERR(base);
 608
 609         tve_regmap_config.lock_arg = tve;
 610         tve->regmap = devm_regmap_init_mmio_clk(dev, "tve", base,
 611                                                 &tve_regmap_config);
 612         if (IS_ERR(tve->regmap)) {
 613                 dev_err(dev, "failed to init regmap: %ld\n",
 614                         PTR_ERR(tve->regmap));
 615                 return PTR_ERR(tve->regmap);
 616         }
 617
 618         irq = platform_get_irq(pdev, 0);
 619         if (irq < 0) {
 620                 dev_err(dev, "failed to get irq\n");
 621                 return irq;
 622         }
 623
 624         ret = devm_request_threaded_irq(dev, irq, NULL,
 625                                         imx_tve_irq_handler, IRQF_ONESHOT,
 626                                         "imx-tve", tve);
 627         if (ret < 0) {
 628                 dev_err(dev, "failed to request irq: %d\n", ret);
 629                 return ret;
 630         }
 631
 632         tve->dac_reg = devm_regulator_get(dev, "dac");
 633         if (!IS_ERR(tve->dac_reg)) {
 634                 regulator_set_voltage(tve->dac_reg, 2750000, 2750000);
 635                 ret = regulator_enable(tve->dac_reg);
 636                 if (ret)
 637                         return ret;
 638         }
 639
 640         tve->clk = devm_clk_get(dev, "tve");
 641         if (IS_ERR(tve->clk)) {
 642                 dev_err(dev, "failed to get high speed tve clock: %ld\n",
 643                         PTR_ERR(tve->clk));
 644                 return PTR_ERR(tve->clk);
 645         }
 646
 647         /* this is the IPU DI clock input selector, can be parented to tve_di */
 648         tve->di_sel_clk = devm_clk_get(dev, "di_sel");
 649         if (IS_ERR(tve->di_sel_clk)) {
 650                 dev_err(dev, "failed to get ipu di mux clock: %ld\n",
 651                         PTR_ERR(tve->di_sel_clk));
 652                 return PTR_ERR(tve->di_sel_clk);
 653         }
 654
 655         ret = tve_clk_init(tve, base);
 656         if (ret < 0)
 657                 return ret;
 658
 659         ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val);
 660         if (ret < 0) {
 661                 dev_err(dev, "failed to read configuration register: %d\n",
 662                         ret);
 663                 return ret;
 664         }
 665         if (val != 0x00100000) {
 666                 dev_err(dev, "configuration register default value indicates this is not a TVEv2\n");
 667                 return -ENODEV;
 668         }
 669
 670         /* disable cable detection for VGA mode */
 671         ret = regmap_write(tve->regmap, TVE_CD_CONT_REG, 0);
 672         if (ret)
 673                 return ret;
 674
 675         ret = imx_tve_register(drm, tve);
 676         if (ret)
 677                 return ret;
 678
 679         dev_set_drvdata(dev, tve);
 680
 681         return 0;
 682 }
 683
 684 static void imx_tve_unbind(struct device *dev, struct device *master,
 685         void *data)
 686 {
 687         struct imx_tve *tve = dev_get_drvdata(dev);
 688
 689         tve->connector.funcs->destroy(&tve->connector);
 690         tve->encoder.funcs->destroy(&tve->encoder);
 691
 692         if (!IS_ERR(tve->dac_reg))
 693                 regulator_disable(tve->dac_reg);
 694 }
 695
 696 static const struct component_ops imx_tve_ops = {
 697         .bind   = imx_tve_bind,
 698         .unbind = imx_tve_unbind,
 699 };
 700
 701 static int imx_tve_probe(struct platform_device *pdev)
 702 {
 703         return component_add(&pdev->dev, &imx_tve_ops);
 704 }
 705
 706 static int imx_tve_remove(struct platform_device *pdev)
 707 {
 708         component_del(&pdev->dev, &imx_tve_ops);
 709         return 0;
 710 }
 711
 712 static const struct of_device_id imx_tve_dt_ids[] = {
 713         { .compatible = "fsl,imx53-tve", },
 714         { /* sentinel */ }
 715 };
 716 MODULE_DEVICE_TABLE(of, imx_tve_dt_ids);
 717
 718 static struct platform_driver imx_tve_driver = {
 719         .probe          = imx_tve_probe,
 720         .remove         = imx_tve_remove,
 721         .driver         = {
 722                 .of_match_table = imx_tve_dt_ids,
 723                 .name   = "imx-tve",
 724         },
 725 };
 726
 727 module_platform_driver(imx_tve_driver);
 728
 729 MODULE_DESCRIPTION("i.MX Television Encoder driver");
 730 MODULE_AUTHOR("Philipp Zabel, Pengutronix");
 731 MODULE_LICENSE("GPL");
 732 MODULE_ALIAS("platform:imx-tve");