drivers/staging/imx-drm/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  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  18  * MA 02110-1301, USA.
  19  */
  20
  21 #include <linux/clk.h>
  22 #include <linux/clk-provider.h>
  23 #include <linux/module.h>
  24 #include <linux/i2c.h>
  25 #include <linux/regmap.h>
  26 #include <linux/regulator/consumer.h>
  27 #include <linux/spinlock.h>
  28 #include <linux/videodev2.h>
  29 #include <drm/drmP.h>
  30 #include <drm/drm_fb_helper.h>
  31 #include <drm/drm_crtc_helper.h>
  32
  33 #include "imx-drm.h"
  34
  35 #define TVE_COM_CONF_REG        0x00
  36 #define TVE_TVDAC0_CONT_REG     0x28
  37 #define TVE_TVDAC1_CONT_REG     0x2c
  38 #define TVE_TVDAC2_CONT_REG     0x30
  39 #define TVE_CD_CONT_REG         0x34
  40 #define TVE_INT_CONT_REG        0x64
  41 #define TVE_STAT_REG            0x68
  42 #define TVE_TST_MODE_REG        0x6c
  43 #define TVE_MV_CONT_REG         0xdc
  44
  45 /* TVE_COM_CONF_REG */
  46 #define TVE_SYNC_CH_2_EN        BIT(22)
  47 #define TVE_SYNC_CH_1_EN        BIT(21)
  48 #define TVE_SYNC_CH_0_EN        BIT(20)
  49 #define TVE_TV_OUT_MODE_MASK    (0x7 << 12)
  50 #define TVE_TV_OUT_DISABLE      (0x0 << 12)
  51 #define TVE_TV_OUT_CVBS_0       (0x1 << 12)
  52 #define TVE_TV_OUT_CVBS_2       (0x2 << 12)
  53 #define TVE_TV_OUT_CVBS_0_2     (0x3 << 12)
  54 #define TVE_TV_OUT_SVIDEO_0_1   (0x4 << 12)
  55 #define TVE_TV_OUT_SVIDEO_0_1_CVBS2_2   (0x5 << 12)
  56 #define TVE_TV_OUT_YPBPR        (0x6 << 12)
  57 #define TVE_TV_OUT_RGB          (0x7 << 12)
  58 #define TVE_TV_STAND_MASK       (0xf << 8)
  59 #define TVE_TV_STAND_HD_1080P30 (0xc << 8)
  60 #define TVE_P2I_CONV_EN         BIT(7)
  61 #define TVE_INP_VIDEO_FORM      BIT(6)
  62 #define TVE_INP_YCBCR_422       (0x0 << 6)
  63 #define TVE_INP_YCBCR_444       (0x1 << 6)
  64 #define TVE_DATA_SOURCE_MASK    (0x3 << 4)
  65 #define TVE_DATA_SOURCE_BUS1    (0x0 << 4)
  66 #define TVE_DATA_SOURCE_BUS2    (0x1 << 4)
  67 #define TVE_DATA_SOURCE_EXT     (0x2 << 4)
  68 #define TVE_DATA_SOURCE_TESTGEN (0x3 << 4)
  69 #define TVE_IPU_CLK_EN_OFS      3
  70 #define TVE_IPU_CLK_EN          BIT(3)
  71 #define TVE_DAC_SAMP_RATE_OFS   1
  72 #define TVE_DAC_SAMP_RATE_WIDTH 2
  73 #define TVE_DAC_SAMP_RATE_MASK  (0x3 << 1)
  74 #define TVE_DAC_FULL_RATE       (0x0 << 1)
  75 #define TVE_DAC_DIV2_RATE       (0x1 << 1)
  76 #define TVE_DAC_DIV4_RATE       (0x2 << 1)
  77 #define TVE_EN                  BIT(0)
  78
  79 /* TVE_TVDACx_CONT_REG */
  80 #define TVE_TVDAC_GAIN_MASK     (0x3f << 0)
  81
  82 /* TVE_CD_CONT_REG */
  83 #define TVE_CD_CH_2_SM_EN       BIT(22)
  84 #define TVE_CD_CH_1_SM_EN       BIT(21)
  85 #define TVE_CD_CH_0_SM_EN       BIT(20)
  86 #define TVE_CD_CH_2_LM_EN       BIT(18)
  87 #define TVE_CD_CH_1_LM_EN       BIT(17)
  88 #define TVE_CD_CH_0_LM_EN       BIT(16)
  89 #define TVE_CD_CH_2_REF_LVL     BIT(10)
  90 #define TVE_CD_CH_1_REF_LVL     BIT(9)
  91 #define TVE_CD_CH_0_REF_LVL     BIT(8)
  92 #define TVE_CD_EN               BIT(0)
  93
  94 /* TVE_INT_CONT_REG */
  95 #define TVE_FRAME_END_IEN       BIT(13)
  96 #define TVE_CD_MON_END_IEN      BIT(2)
  97 #define TVE_CD_SM_IEN           BIT(1)
  98 #define TVE_CD_LM_IEN           BIT(0)
  99
 100 /* TVE_TST_MODE_REG */
 101 #define TVE_TVDAC_TEST_MODE_MASK        (0x7 << 0)
 102
 103 #define con_to_tve(x) container_of(x, struct imx_tve, connector)
 104 #define enc_to_tve(x) container_of(x, struct imx_tve, encoder)
 105
 106 enum {
 107         TVE_MODE_TVOUT,
 108         TVE_MODE_VGA,
 109 };
 110
 111 struct imx_tve {
 112         struct drm_connector connector;
 113         struct imx_drm_connector *imx_drm_connector;
 114         struct drm_encoder encoder;
 115         struct imx_drm_encoder *imx_drm_encoder;
 116         struct device *dev;
 117         spinlock_t enable_lock; /* serializes tve_enable/disable */
 118         spinlock_t lock;        /* register lock */
 119         bool enabled;
 120         int mode;
 121
 122         struct regmap *regmap;
 123         struct regulator *dac_reg;
 124         struct i2c_adapter *ddc;
 125         struct clk *clk;
 126         struct clk *di_sel_clk;
 127         struct clk_hw clk_hw_di;
 128         struct clk *di_clk;
 129         int vsync_pin;
 130         int hsync_pin;
 131 };
 132
 133 static void tve_lock(void *__tve)
 134 __acquires(&tve->lock)
 135 {
 136         struct imx_tve *tve = __tve;
 137         spin_lock(&tve->lock);
 138 }
 139
 140 static void tve_unlock(void *__tve)
 141 __releases(&tve->lock)
 142 {
 143         struct imx_tve *tve = __tve;
 144         spin_unlock(&tve->lock);
 145 }
 146
 147 static void tve_enable(struct imx_tve *tve)
 148 {
 149         unsigned long flags;
 150         int ret;
 151
 152         spin_lock_irqsave(&tve->enable_lock, flags);
 153         if (!tve->enabled) {
 154                 tve->enabled = 1;
 155                 clk_prepare_enable(tve->clk);
 156                 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
 157                                          TVE_IPU_CLK_EN | TVE_EN,
 158                                          TVE_IPU_CLK_EN | TVE_EN);
 159         }
 160
 161         /* clear interrupt status register */
 162         regmap_write(tve->regmap, TVE_STAT_REG, 0xffffffff);
 163
 164         /* cable detection irq disabled in VGA mode, enabled in TVOUT mode */
 165         if (tve->mode == TVE_MODE_VGA)
 166                 regmap_write(tve->regmap, TVE_INT_CONT_REG, 0);
 167         else
 168                 regmap_write(tve->regmap, TVE_INT_CONT_REG,
 169                              TVE_CD_SM_IEN |
 170                              TVE_CD_LM_IEN |
 171                              TVE_CD_MON_END_IEN);
 172
 173         spin_unlock_irqrestore(&tve->enable_lock, flags);
 174 }
 175
 176 static void tve_disable(struct imx_tve *tve)
 177 {
 178         unsigned long flags;
 179         int ret;
 180
 181         spin_lock_irqsave(&tve->enable_lock, flags);
 182         if (tve->enabled) {
 183                 tve->enabled = 0;
 184                 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
 185                                          TVE_IPU_CLK_EN | TVE_EN, 0);
 186                 clk_disable_unprepare(tve->clk);
 187         }
 188         spin_unlock_irqrestore(&tve->enable_lock, flags);
 189 }
 190
 191 static int tve_setup_tvout(struct imx_tve *tve)
 192 {
 193         return -ENOTSUPP;
 194 }
 195
 196 static int tve_setup_vga(struct imx_tve *tve)
 197 {
 198         unsigned int mask;
 199         unsigned int val;
 200         int ret;
 201
 202         /* set gain to (1 + 10/128) to provide 0.7V peak-to-peak amplitude */
 203         ret = regmap_update_bits(tve->regmap, TVE_TVDAC0_CONT_REG,
 204                                  TVE_TVDAC_GAIN_MASK, 0x0a);
 205         ret = regmap_update_bits(tve->regmap, TVE_TVDAC1_CONT_REG,
 206                                  TVE_TVDAC_GAIN_MASK, 0x0a);
 207         ret = regmap_update_bits(tve->regmap, TVE_TVDAC2_CONT_REG,
 208                                  TVE_TVDAC_GAIN_MASK, 0x0a);
 209
 210         /* set configuration register */
 211         mask = TVE_DATA_SOURCE_MASK | TVE_INP_VIDEO_FORM;
 212         val  = TVE_DATA_SOURCE_BUS2 | TVE_INP_YCBCR_444;
 213         mask |= TVE_TV_STAND_MASK       | TVE_P2I_CONV_EN;
 214         val  |= TVE_TV_STAND_HD_1080P30 | 0;
 215         mask |= TVE_TV_OUT_MODE_MASK | TVE_SYNC_CH_0_EN;
 216         val  |= TVE_TV_OUT_RGB       | TVE_SYNC_CH_0_EN;
 217         ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG, mask, val);
 218         if (ret < 0) {
 219                 dev_err(tve->dev, "failed to set configuration: %d\n", ret);
 220                 return ret;
 221         }
 222
 223         /* set test mode (as documented) */
 224         ret = regmap_update_bits(tve->regmap, TVE_TST_MODE_REG,
 225                                  TVE_TVDAC_TEST_MODE_MASK, 1);
 226
 227         return 0;
 228 }
 229
 230 static enum drm_connector_status imx_tve_connector_detect(
 231                                 struct drm_connector *connector, bool force)
 232 {
 233         return connector_status_connected;
 234 }
 235
 236 static void imx_tve_connector_destroy(struct drm_connector *connector)
 237 {
 238         /* do not free here */
 239 }
 240
 241 static int imx_tve_connector_get_modes(struct drm_connector *connector)
 242 {
 243         struct imx_tve *tve = con_to_tve(connector);
 244         struct edid *edid;
 245         int ret = 0;
 246
 247         if (!tve->ddc)
 248                 return 0;
 249
 250         edid = drm_get_edid(connector, tve->ddc);
 251         if (edid) {
 252                 drm_mode_connector_update_edid_property(connector, edid);
 253                 ret = drm_add_edid_modes(connector, edid);
 254                 kfree(edid);
 255         }
 256
 257         return ret;
 258 }
 259
 260 static int imx_tve_connector_mode_valid(struct drm_connector *connector,
 261                                         struct drm_display_mode *mode)
 262 {
 263         struct imx_tve *tve = con_to_tve(connector);
 264         unsigned long rate;
 265
 266         /* pixel clock with 2x oversampling */
 267         rate = clk_round_rate(tve->clk, 2000UL * mode->clock) / 2000;
 268         if (rate == mode->clock)
 269                 return MODE_OK;
 270
 271         /* pixel clock without oversampling */
 272         rate = clk_round_rate(tve->clk, 1000UL * mode->clock) / 1000;
 273         if (rate == mode->clock)
 274                 return MODE_OK;
 275
 276         dev_warn(tve->dev, "ignoring mode %dx%d\n",
 277                  mode->hdisplay, mode->vdisplay);
 278
 279         return MODE_BAD;
 280 }
 281
 282 static struct drm_encoder *imx_tve_connector_best_encoder(
 283                 struct drm_connector *connector)
 284 {
 285         struct imx_tve *tve = con_to_tve(connector);
 286
 287         return &tve->encoder;
 288 }
 289
 290 static void imx_tve_encoder_dpms(struct drm_encoder *encoder, int mode)
 291 {
 292         struct imx_tve *tve = enc_to_tve(encoder);
 293         int ret;
 294
 295         ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
 296                                  TVE_TV_OUT_MODE_MASK, TVE_TV_OUT_DISABLE);
 297         if (ret < 0)
 298                 dev_err(tve->dev, "failed to disable TVOUT: %d\n", ret);
 299 }
 300
 301 static bool imx_tve_encoder_mode_fixup(struct drm_encoder *encoder,
 302                                        const struct drm_display_mode *mode,
 303                                        struct drm_display_mode *adjusted_mode)
 304 {
 305         return true;
 306 }
 307
 308 static void imx_tve_encoder_prepare(struct drm_encoder *encoder)
 309 {
 310         struct imx_tve *tve = enc_to_tve(encoder);
 311
 312         tve_disable(tve);
 313
 314         switch (tve->mode) {
 315         case TVE_MODE_VGA:
 316                 imx_drm_crtc_panel_format_pins(encoder->crtc,
 317                                 DRM_MODE_ENCODER_DAC, IPU_PIX_FMT_GBR24,
 318                                 tve->hsync_pin, tve->vsync_pin);
 319                 break;
 320         case TVE_MODE_TVOUT:
 321                 imx_drm_crtc_panel_format(encoder->crtc, DRM_MODE_ENCODER_TVDAC,
 322                                           V4L2_PIX_FMT_YUV444);
 323                 break;
 324         }
 325 }
 326
 327 static void imx_tve_encoder_mode_set(struct drm_encoder *encoder,
 328                                      struct drm_display_mode *mode,
 329                                      struct drm_display_mode *adjusted_mode)
 330 {
 331         struct imx_tve *tve = enc_to_tve(encoder);
 332         unsigned long rounded_rate;
 333         unsigned long rate;
 334         int div = 1;
 335         int ret;
 336
 337         /*
 338          * FIXME
 339          * we should try 4k * mode->clock first,
 340          * and enable 4x oversampling for lower resolutions
 341          */
 342         rate = 2000UL * mode->clock;
 343         clk_set_rate(tve->clk, rate);
 344         rounded_rate = clk_get_rate(tve->clk);
 345         if (rounded_rate >= rate)
 346                 div = 2;
 347         clk_set_rate(tve->di_clk, rounded_rate / div);
 348
 349         ret = clk_set_parent(tve->di_sel_clk, tve->di_clk);
 350         if (ret < 0) {
 351                 dev_err(tve->dev, "failed to set di_sel parent to tve_di: %d\n",
 352                         ret);
 353         }
 354
 355         if (tve->mode == TVE_MODE_VGA)
 356                 tve_setup_vga(tve);
 357         else
 358                 tve_setup_tvout(tve);
 359 }
 360
 361 static void imx_tve_encoder_commit(struct drm_encoder *encoder)
 362 {
 363         struct imx_tve *tve = enc_to_tve(encoder);
 364
 365         tve_enable(tve);
 366 }
 367
 368 static void imx_tve_encoder_disable(struct drm_encoder *encoder)
 369 {
 370         struct imx_tve *tve = enc_to_tve(encoder);
 371
 372         tve_disable(tve);
 373 }
 374
 375 static void imx_tve_encoder_destroy(struct drm_encoder *encoder)
 376 {
 377         /* do not free here */
 378 }
 379
 380 static struct drm_connector_funcs imx_tve_connector_funcs = {
 381         .dpms = drm_helper_connector_dpms,
 382         .fill_modes = drm_helper_probe_single_connector_modes,
 383         .detect = imx_tve_connector_detect,
 384         .destroy = imx_tve_connector_destroy,
 385 };
 386
 387 static struct drm_connector_helper_funcs imx_tve_connector_helper_funcs = {
 388         .get_modes = imx_tve_connector_get_modes,
 389         .best_encoder = imx_tve_connector_best_encoder,
 390         .mode_valid = imx_tve_connector_mode_valid,
 391 };
 392
 393 static struct drm_encoder_funcs imx_tve_encoder_funcs = {
 394         .destroy = imx_tve_encoder_destroy,
 395 };
 396
 397 static struct drm_encoder_helper_funcs imx_tve_encoder_helper_funcs = {
 398         .dpms = imx_tve_encoder_dpms,
 399         .mode_fixup = imx_tve_encoder_mode_fixup,
 400         .prepare = imx_tve_encoder_prepare,
 401         .mode_set = imx_tve_encoder_mode_set,
 402         .commit = imx_tve_encoder_commit,
 403         .disable = imx_tve_encoder_disable,
 404 };
 405
 406 static irqreturn_t imx_tve_irq_handler(int irq, void *data)
 407 {
 408         struct imx_tve *tve = data;
 409         unsigned int val;
 410
 411         regmap_read(tve->regmap, TVE_STAT_REG, &val);
 412
 413         /* clear interrupt status register */
 414         regmap_write(tve->regmap, TVE_STAT_REG, 0xffffffff);
 415
 416         return IRQ_HANDLED;
 417 }
 418
 419 static unsigned long clk_tve_di_recalc_rate(struct clk_hw *hw,
 420                                             unsigned long parent_rate)
 421 {
 422         struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di);
 423         unsigned int val;
 424         int ret;
 425
 426         ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val);
 427         if (ret < 0)
 428                 return 0;
 429
 430         switch (val & TVE_DAC_SAMP_RATE_MASK) {
 431         case TVE_DAC_DIV4_RATE:
 432                 return parent_rate / 4;
 433         case TVE_DAC_DIV2_RATE:
 434                 return parent_rate / 2;
 435         case TVE_DAC_FULL_RATE:
 436         default:
 437                 return parent_rate;
 438         }
 439
 440         return 0;
 441 }
 442
 443 static long clk_tve_di_round_rate(struct clk_hw *hw, unsigned long rate,
 444                                   unsigned long *prate)
 445 {
 446         unsigned long div;
 447
 448         div = *prate / rate;
 449         if (div >= 4)
 450                 return *prate / 4;
 451         else if (div >= 2)
 452                 return *prate / 2;
 453         else
 454                 return *prate;
 455 }
 456
 457 static int clk_tve_di_set_rate(struct clk_hw *hw, unsigned long rate,
 458                                unsigned long parent_rate)
 459 {
 460         struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di);
 461         unsigned long div;
 462         u32 val;
 463         int ret;
 464
 465         div = parent_rate / rate;
 466         if (div >= 4)
 467                 val = TVE_DAC_DIV4_RATE;
 468         else if (div >= 2)
 469                 val = TVE_DAC_DIV2_RATE;
 470         else
 471                 val = TVE_DAC_FULL_RATE;
 472
 473         ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
 474                                  TVE_DAC_SAMP_RATE_MASK, val);
 475
 476         if (ret < 0) {
 477                 dev_err(tve->dev, "failed to set divider: %d\n", ret);
 478                 return ret;
 479         }
 480
 481         return 0;
 482 }
 483
 484 static struct clk_ops clk_tve_di_ops = {
 485         .round_rate = clk_tve_di_round_rate,
 486         .set_rate = clk_tve_di_set_rate,
 487         .recalc_rate = clk_tve_di_recalc_rate,
 488 };
 489
 490 static int tve_clk_init(struct imx_tve *tve, void __iomem *base)
 491 {
 492         const char *tve_di_parent[1];
 493         struct clk_init_data init = {
 494                 .name = "tve_di",
 495                 .ops = &clk_tve_di_ops,
 496                 .num_parents = 1,
 497                 .flags = 0,
 498         };
 499
 500         tve_di_parent[0] = __clk_get_name(tve->clk);
 501         init.parent_names = (const char **)&tve_di_parent;
 502
 503         tve->clk_hw_di.init = &init;
 504         tve->di_clk = clk_register(tve->dev, &tve->clk_hw_di);
 505         if (IS_ERR(tve->di_clk)) {
 506                 dev_err(tve->dev, "failed to register TVE output clock: %ld\n",
 507                         PTR_ERR(tve->di_clk));
 508                 return PTR_ERR(tve->di_clk);
 509         }
 510
 511         return 0;
 512 }
 513
 514 static int imx_tve_register(struct imx_tve *tve)
 515 {
 516         int ret;
 517
 518         tve->connector.funcs = &imx_tve_connector_funcs;
 519         tve->encoder.funcs = &imx_tve_encoder_funcs;
 520
 521         tve->encoder.encoder_type = DRM_MODE_ENCODER_NONE;
 522         tve->connector.connector_type = DRM_MODE_CONNECTOR_VGA;
 523
 524         drm_encoder_helper_add(&tve->encoder, &imx_tve_encoder_helper_funcs);
 525         ret = imx_drm_add_encoder(&tve->encoder, &tve->imx_drm_encoder,
 526                         THIS_MODULE);
 527         if (ret) {
 528                 dev_err(tve->dev, "adding encoder failed with %d\n", ret);
 529                 return ret;
 530         }
 531
 532         drm_connector_helper_add(&tve->connector,
 533                         &imx_tve_connector_helper_funcs);
 534
 535         ret = imx_drm_add_connector(&tve->connector,
 536                         &tve->imx_drm_connector, THIS_MODULE);
 537         if (ret) {
 538                 imx_drm_remove_encoder(tve->imx_drm_encoder);
 539                 dev_err(tve->dev, "adding connector failed with %d\n", ret);
 540                 return ret;
 541         }
 542
 543         drm_mode_connector_attach_encoder(&tve->connector, &tve->encoder);
 544
 545         return 0;
 546 }
 547
 548 static bool imx_tve_readable_reg(struct device *dev, unsigned int reg)
 549 {
 550         return (reg % 4 == 0) && (reg <= 0xdc);
 551 }
 552
 553 static struct regmap_config tve_regmap_config = {
 554         .reg_bits = 32,
 555         .val_bits = 32,
 556         .reg_stride = 4,
 557
 558         .readable_reg = imx_tve_readable_reg,
 559
 560         .lock = tve_lock,
 561         .unlock = tve_unlock,
 562
 563         .max_register = 0xdc,
 564 };
 565
 566 static const char *imx_tve_modes[] = {
 567         [TVE_MODE_TVOUT]  = "tvout",
 568         [TVE_MODE_VGA] = "vga",
 569 };
 570
 571 const int of_get_tve_mode(struct device_node *np)
 572 {
 573         const char *bm;
 574         int ret, i;
 575
 576         ret = of_property_read_string(np, "fsl,tve-mode", &bm);
 577         if (ret < 0)
 578                 return ret;
 579
 580         for (i = 0; i < ARRAY_SIZE(imx_tve_modes); i++)
 581                 if (!strcasecmp(bm, imx_tve_modes[i]))
 582                         return i;
 583
 584         return -EINVAL;
 585 }
 586
 587 static int imx_tve_probe(struct platform_device *pdev)
 588 {
 589         struct device_node *np = pdev->dev.of_node;
 590         struct device_node *ddc_node;
 591         struct imx_tve *tve;
 592         struct resource *res;
 593         void __iomem *base;
 594         unsigned int val;
 595         int irq;
 596         int ret;
 597
 598         tve = devm_kzalloc(&pdev->dev, sizeof(*tve), GFP_KERNEL);
 599         if (!tve)
 600                 return -ENOMEM;
 601
 602         tve->dev = &pdev->dev;
 603         spin_lock_init(&tve->lock);
 604         spin_lock_init(&tve->enable_lock);
 605
 606         ddc_node = of_parse_phandle(np, "ddc", 0);
 607         if (ddc_node) {
 608                 tve->ddc = of_find_i2c_adapter_by_node(ddc_node);
 609                 of_node_put(ddc_node);
 610         }
 611
 612         tve->mode = of_get_tve_mode(np);
 613         if (tve->mode != TVE_MODE_VGA) {
 614                 dev_err(&pdev->dev, "only VGA mode supported, currently\n");
 615                 return -EINVAL;
 616         }
 617
 618         if (tve->mode == TVE_MODE_VGA) {
 619                 ret = of_property_read_u32(np, "fsl,hsync-pin",
 620                                            &tve->hsync_pin);
 621
 622                 if (ret < 0) {
 623                         dev_err(&pdev->dev, "failed to get vsync pin\n");
 624                         return ret;
 625                 }
 626
 627                 ret |= of_property_read_u32(np, "fsl,vsync-pin",
 628                                             &tve->vsync_pin);
 629
 630                 if (ret < 0) {
 631                         dev_err(&pdev->dev, "failed to get vsync pin\n");
 632                         return ret;
 633                 }
 634         }
 635
 636         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 637         base = devm_ioremap_resource(&pdev->dev, res);
 638         if (IS_ERR(base))
 639                 return PTR_ERR(base);
 640
 641         tve_regmap_config.lock_arg = tve;
 642         tve->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "tve", base,
 643                                                 &tve_regmap_config);
 644         if (IS_ERR(tve->regmap)) {
 645                 dev_err(&pdev->dev, "failed to init regmap: %ld\n",
 646                         PTR_ERR(tve->regmap));
 647                 return PTR_ERR(tve->regmap);
 648         }
 649
 650         irq = platform_get_irq(pdev, 0);
 651         if (irq < 0) {
 652                 dev_err(&pdev->dev, "failed to get irq\n");
 653                 return irq;
 654         }
 655
 656         ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
 657                                         imx_tve_irq_handler, IRQF_ONESHOT,
 658                                         "imx-tve", tve);
 659         if (ret < 0) {
 660                 dev_err(&pdev->dev, "failed to request irq: %d\n", ret);
 661                 return ret;
 662         }
 663
 664         tve->dac_reg = devm_regulator_get(&pdev->dev, "dac");
 665         if (!IS_ERR(tve->dac_reg)) {
 666                 regulator_set_voltage(tve->dac_reg, 2750000, 2750000);
 667                 ret = regulator_enable(tve->dac_reg);
 668                 if (ret)
 669                         return ret;
 670         }
 671
 672         tve->clk = devm_clk_get(&pdev->dev, "tve");
 673         if (IS_ERR(tve->clk)) {
 674                 dev_err(&pdev->dev, "failed to get high speed tve clock: %ld\n",
 675                         PTR_ERR(tve->clk));
 676                 return PTR_ERR(tve->clk);
 677         }
 678
 679         /* this is the IPU DI clock input selector, can be parented to tve_di */
 680         tve->di_sel_clk = devm_clk_get(&pdev->dev, "di_sel");
 681         if (IS_ERR(tve->di_sel_clk)) {
 682                 dev_err(&pdev->dev, "failed to get ipu di mux clock: %ld\n",
 683                         PTR_ERR(tve->di_sel_clk));
 684                 return PTR_ERR(tve->di_sel_clk);
 685         }
 686
 687         ret = tve_clk_init(tve, base);
 688         if (ret < 0)
 689                 return ret;
 690
 691         ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val);
 692         if (ret < 0) {
 693                 dev_err(&pdev->dev, "failed to read configuration register: %d\n", ret);
 694                 return ret;
 695         }
 696         if (val != 0x00100000) {
 697                 dev_err(&pdev->dev, "configuration register default value indicates this is not a TVEv2\n");
 698                 return -ENODEV;
 699         };
 700
 701         /* disable cable detection for VGA mode */
 702         ret = regmap_write(tve->regmap, TVE_CD_CONT_REG, 0);
 703
 704         ret = imx_tve_register(tve);
 705         if (ret)
 706                 return ret;
 707
 708         ret = imx_drm_encoder_add_possible_crtcs(tve->imx_drm_encoder, np);
 709
 710         platform_set_drvdata(pdev, tve);
 711
 712         return 0;
 713 }
 714
 715 static int imx_tve_remove(struct platform_device *pdev)
 716 {
 717         struct imx_tve *tve = platform_get_drvdata(pdev);
 718         struct drm_connector *connector = &tve->connector;
 719         struct drm_encoder *encoder = &tve->encoder;
 720
 721         drm_mode_connector_detach_encoder(connector, encoder);
 722
 723         imx_drm_remove_connector(tve->imx_drm_connector);
 724         imx_drm_remove_encoder(tve->imx_drm_encoder);
 725
 726         if (!IS_ERR(tve->dac_reg))
 727                 regulator_disable(tve->dac_reg);
 728
 729         return 0;
 730 }
 731
 732 static const struct of_device_id imx_tve_dt_ids[] = {
 733         { .compatible = "fsl,imx53-tve", },
 734         { /* sentinel */ }
 735 };
 736
 737 static struct platform_driver imx_tve_driver = {
 738         .probe          = imx_tve_probe,
 739         .remove         = imx_tve_remove,
 740         .driver         = {
 741                 .of_match_table = imx_tve_dt_ids,
 742                 .name   = "imx-tve",
 743                 .owner  = THIS_MODULE,
 744         },
 745 };
 746
 747 module_platform_driver(imx_tve_driver);
 748
 749 MODULE_DESCRIPTION("i.MX Television Encoder driver");
 750 MODULE_AUTHOR("Philipp Zabel, Pengutronix");
 751 MODULE_LICENSE("GPL");
 752 MODULE_ALIAS("platform:imx-tve");