drivers/gpu/drm/sti/sti_tvout.c

   1 /*
   2  * Copyright (C) STMicroelectronics SA 2014
   3  * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
   4  *          Vincent Abriou <vincent.abriou@st.com>
   5  *          for STMicroelectronics.
   6  * License terms:  GNU General Public License (GPL), version 2
   7  */
   8
   9 #include <linux/clk.h>
  10 #include <linux/component.h>
  11 #include <linux/module.h>
  12 #include <linux/of_platform.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/reset.h>
  15
  16 #include <drm/drmP.h>
  17 #include <drm/drm_crtc_helper.h>
  18
  19 /* glue registers */
  20 #define TVO_CSC_MAIN_M0                  0x000
  21 #define TVO_CSC_MAIN_M1                  0x004
  22 #define TVO_CSC_MAIN_M2                  0x008
  23 #define TVO_CSC_MAIN_M3                  0x00c
  24 #define TVO_CSC_MAIN_M4                  0x010
  25 #define TVO_CSC_MAIN_M5                  0x014
  26 #define TVO_CSC_MAIN_M6                  0x018
  27 #define TVO_CSC_MAIN_M7                  0x01c
  28 #define TVO_MAIN_IN_VID_FORMAT           0x030
  29 #define TVO_CSC_AUX_M0                   0x100
  30 #define TVO_CSC_AUX_M1                   0x104
  31 #define TVO_CSC_AUX_M2                   0x108
  32 #define TVO_CSC_AUX_M3                   0x10c
  33 #define TVO_CSC_AUX_M4                   0x110
  34 #define TVO_CSC_AUX_M5                   0x114
  35 #define TVO_CSC_AUX_M6                   0x118
  36 #define TVO_CSC_AUX_M7                   0x11c
  37 #define TVO_AUX_IN_VID_FORMAT            0x130
  38 #define TVO_VIP_HDF                      0x400
  39 #define TVO_HD_SYNC_SEL                  0x418
  40 #define TVO_HD_DAC_CFG_OFF               0x420
  41 #define TVO_VIP_HDMI                     0x500
  42 #define TVO_HDMI_FORCE_COLOR_0           0x504
  43 #define TVO_HDMI_FORCE_COLOR_1           0x508
  44 #define TVO_HDMI_CLIP_VALUE_B_CB         0x50c
  45 #define TVO_HDMI_CLIP_VALUE_Y_G          0x510
  46 #define TVO_HDMI_CLIP_VALUE_R_CR         0x514
  47 #define TVO_HDMI_SYNC_SEL                0x518
  48 #define TVO_HDMI_DFV_OBS                 0x540
  49
  50 #define TVO_IN_FMT_SIGNED                BIT(0)
  51 #define TVO_SYNC_EXT                     BIT(4)
  52
  53 #define TVO_VIP_REORDER_R_SHIFT          24
  54 #define TVO_VIP_REORDER_G_SHIFT          20
  55 #define TVO_VIP_REORDER_B_SHIFT          16
  56 #define TVO_VIP_REORDER_MASK             0x3
  57 #define TVO_VIP_REORDER_Y_G_SEL          0
  58 #define TVO_VIP_REORDER_CB_B_SEL         1
  59 #define TVO_VIP_REORDER_CR_R_SEL         2
  60
  61 #define TVO_VIP_CLIP_SHIFT               8
  62 #define TVO_VIP_CLIP_MASK                0x7
  63 #define TVO_VIP_CLIP_DISABLED            0
  64 #define TVO_VIP_CLIP_EAV_SAV             1
  65 #define TVO_VIP_CLIP_LIMITED_RANGE_RGB_Y 2
  66 #define TVO_VIP_CLIP_LIMITED_RANGE_CB_CR 3
  67 #define TVO_VIP_CLIP_PROG_RANGE          4
  68
  69 #define TVO_VIP_RND_SHIFT                4
  70 #define TVO_VIP_RND_MASK                 0x3
  71 #define TVO_VIP_RND_8BIT_ROUNDED         0
  72 #define TVO_VIP_RND_10BIT_ROUNDED        1
  73 #define TVO_VIP_RND_12BIT_ROUNDED        2
  74
  75 #define TVO_VIP_SEL_INPUT_MASK           0xf
  76 #define TVO_VIP_SEL_INPUT_MAIN           0x0
  77 #define TVO_VIP_SEL_INPUT_AUX            0x8
  78 #define TVO_VIP_SEL_INPUT_FORCE_COLOR    0xf
  79 #define TVO_VIP_SEL_INPUT_BYPASS_MASK    0x1
  80 #define TVO_VIP_SEL_INPUT_BYPASSED       1
  81
  82 #define TVO_SYNC_MAIN_VTG_SET_REF        0x00
  83 #define TVO_SYNC_MAIN_VTG_SET_1          0x01
  84 #define TVO_SYNC_MAIN_VTG_SET_2          0x02
  85 #define TVO_SYNC_MAIN_VTG_SET_3          0x03
  86 #define TVO_SYNC_MAIN_VTG_SET_4          0x04
  87 #define TVO_SYNC_MAIN_VTG_SET_5          0x05
  88 #define TVO_SYNC_MAIN_VTG_SET_6          0x06
  89 #define TVO_SYNC_AUX_VTG_SET_REF         0x10
  90 #define TVO_SYNC_AUX_VTG_SET_1           0x11
  91 #define TVO_SYNC_AUX_VTG_SET_2           0x12
  92 #define TVO_SYNC_AUX_VTG_SET_3           0x13
  93 #define TVO_SYNC_AUX_VTG_SET_4           0x14
  94 #define TVO_SYNC_AUX_VTG_SET_5           0x15
  95 #define TVO_SYNC_AUX_VTG_SET_6           0x16
  96
  97 #define TVO_SYNC_HD_DCS_SHIFT            8
  98
  99 #define ENCODER_MAIN_CRTC_MASK           BIT(0)
 100
 101 /* enum listing the supported output data format */
 102 enum sti_tvout_video_out_type {
 103         STI_TVOUT_VIDEO_OUT_RGB,
 104         STI_TVOUT_VIDEO_OUT_YUV,
 105 };
 106
 107 struct sti_tvout {
 108         struct device *dev;
 109         struct drm_device *drm_dev;
 110         void __iomem *regs;
 111         struct reset_control *reset;
 112         struct drm_encoder *hdmi;
 113         struct drm_encoder *hda;
 114 };
 115
 116 struct sti_tvout_encoder {
 117         struct drm_encoder encoder;
 118         struct sti_tvout *tvout;
 119 };
 120
 121 #define to_sti_tvout_encoder(x) \
 122         container_of(x, struct sti_tvout_encoder, encoder)
 123
 124 #define to_sti_tvout(x) to_sti_tvout_encoder(x)->tvout
 125
 126 /* preformatter conversion matrix */
 127 static const u32 rgb_to_ycbcr_601[8] = {
 128         0xF927082E, 0x04C9FEAB, 0x01D30964, 0xFA95FD3D,
 129         0x0000082E, 0x00002000, 0x00002000, 0x00000000
 130 };
 131
 132 /* 709 RGB to YCbCr */
 133 static const u32 rgb_to_ycbcr_709[8] = {
 134         0xF891082F, 0x0367FF40, 0x01280B71, 0xF9B1FE20,
 135         0x0000082F, 0x00002000, 0x00002000, 0x00000000
 136 };
 137
 138 static u32 tvout_read(struct sti_tvout *tvout, int offset)
 139 {
 140         return readl(tvout->regs + offset);
 141 }
 142
 143 static void tvout_write(struct sti_tvout *tvout, u32 val, int offset)
 144 {
 145         writel(val, tvout->regs + offset);
 146 }
 147
 148 /**
 149  * Set the clipping mode of a VIP
 150  *
 151  * @tvout: tvout structure
 152  * @cr_r:
 153  * @y_g:
 154  * @cb_b:
 155  */
 156 static void tvout_vip_set_color_order(struct sti_tvout *tvout,
 157                                       u32 cr_r, u32 y_g, u32 cb_b)
 158 {
 159         u32 val = tvout_read(tvout, TVO_VIP_HDMI);
 160
 161         val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_R_SHIFT);
 162         val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_G_SHIFT);
 163         val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_B_SHIFT);
 164         val |= cr_r << TVO_VIP_REORDER_R_SHIFT;
 165         val |= y_g << TVO_VIP_REORDER_G_SHIFT;
 166         val |= cb_b << TVO_VIP_REORDER_B_SHIFT;
 167
 168         tvout_write(tvout, val, TVO_VIP_HDMI);
 169 }
 170
 171 /**
 172  * Set the clipping mode of a VIP
 173  *
 174  * @tvout: tvout structure
 175  * @range: clipping range
 176  */
 177 static void tvout_vip_set_clip_mode(struct sti_tvout *tvout, u32 range)
 178 {
 179         u32 val = tvout_read(tvout, TVO_VIP_HDMI);
 180
 181         val &= ~(TVO_VIP_CLIP_MASK << TVO_VIP_CLIP_SHIFT);
 182         val |= range << TVO_VIP_CLIP_SHIFT;
 183         tvout_write(tvout, val, TVO_VIP_HDMI);
 184 }
 185
 186 /**
 187  * Set the rounded value of a VIP
 188  *
 189  * @tvout: tvout structure
 190  * @rnd: rounded val per component
 191  */
 192 static void tvout_vip_set_rnd(struct sti_tvout *tvout, u32 rnd)
 193 {
 194         u32 val = tvout_read(tvout, TVO_VIP_HDMI);
 195
 196         val &= ~(TVO_VIP_RND_MASK << TVO_VIP_RND_SHIFT);
 197         val |= rnd << TVO_VIP_RND_SHIFT;
 198         tvout_write(tvout, val, TVO_VIP_HDMI);
 199 }
 200
 201 /**
 202  * Select the VIP input
 203  *
 204  * @tvout: tvout structure
 205  * @sel_input: selected_input (main/aux + conv)
 206  */
 207 static void tvout_vip_set_sel_input(struct sti_tvout *tvout,
 208                                     bool main_path,
 209                                     bool sel_input_logic_inverted,
 210                                     enum sti_tvout_video_out_type video_out)
 211 {
 212         u32 sel_input;
 213         u32 val = tvout_read(tvout, TVO_VIP_HDMI);
 214
 215         if (main_path)
 216                 sel_input = TVO_VIP_SEL_INPUT_MAIN;
 217         else
 218                 sel_input = TVO_VIP_SEL_INPUT_AUX;
 219
 220         switch (video_out) {
 221         case STI_TVOUT_VIDEO_OUT_RGB:
 222                 sel_input |= TVO_VIP_SEL_INPUT_BYPASSED;
 223                 break;
 224         case STI_TVOUT_VIDEO_OUT_YUV:
 225                 sel_input &= ~TVO_VIP_SEL_INPUT_BYPASSED;
 226                 break;
 227         }
 228
 229         /* on stih407 chip the sel_input bypass mode logic is inverted */
 230         if (sel_input_logic_inverted)
 231                 sel_input = sel_input ^ TVO_VIP_SEL_INPUT_BYPASS_MASK;
 232
 233         val &= ~TVO_VIP_SEL_INPUT_MASK;
 234         val |= sel_input;
 235         tvout_write(tvout, val, TVO_VIP_HDMI);
 236 }
 237
 238 /**
 239  * Select the input video signed or unsigned
 240  *
 241  * @tvout: tvout structure
 242  * @in_vid_signed: used video input format
 243  */
 244 static void tvout_vip_set_in_vid_fmt(struct sti_tvout *tvout, u32 in_vid_fmt)
 245 {
 246         u32 val = tvout_read(tvout, TVO_VIP_HDMI);
 247
 248         val &= ~TVO_IN_FMT_SIGNED;
 249         val |= in_vid_fmt;
 250         tvout_write(tvout, val, TVO_MAIN_IN_VID_FORMAT);
 251 }
 252
 253 /**
 254  * Start VIP block for HDMI output
 255  *
 256  * @tvout: pointer on tvout structure
 257  * @main_path: true if main path has to be used in the vip configuration
 258  *        else aux path is used.
 259  */
 260 static void tvout_hdmi_start(struct sti_tvout *tvout, bool main_path)
 261 {
 262         struct device_node *node = tvout->dev->of_node;
 263         bool sel_input_logic_inverted = false;
 264
 265         dev_dbg(tvout->dev, "%s\n", __func__);
 266
 267         if (main_path) {
 268                 DRM_DEBUG_DRIVER("main vip for hdmi\n");
 269                 /* select the input sync for hdmi = VTG set 1 */
 270                 tvout_write(tvout, TVO_SYNC_MAIN_VTG_SET_1, TVO_HDMI_SYNC_SEL);
 271         } else {
 272                 DRM_DEBUG_DRIVER("aux vip for hdmi\n");
 273                 /* select the input sync for hdmi = VTG set 1 */
 274                 tvout_write(tvout, TVO_SYNC_AUX_VTG_SET_1, TVO_HDMI_SYNC_SEL);
 275         }
 276
 277         /* set color channel order */
 278         tvout_vip_set_color_order(tvout,
 279                                   TVO_VIP_REORDER_CR_R_SEL,
 280                                   TVO_VIP_REORDER_Y_G_SEL,
 281                                   TVO_VIP_REORDER_CB_B_SEL);
 282
 283         /* set clipping mode (Limited range RGB/Y) */
 284         tvout_vip_set_clip_mode(tvout, TVO_VIP_CLIP_LIMITED_RANGE_RGB_Y);
 285
 286         /* set round mode (rounded to 8-bit per component) */
 287         tvout_vip_set_rnd(tvout, TVO_VIP_RND_8BIT_ROUNDED);
 288
 289         if (of_device_is_compatible(node, "st,stih407-tvout")) {
 290                 /* set input video format */
 291                 tvout_vip_set_in_vid_fmt(tvout->regs + TVO_MAIN_IN_VID_FORMAT,
 292                                          TVO_IN_FMT_SIGNED);
 293                 sel_input_logic_inverted = true;
 294         }
 295
 296         /* input selection */
 297         tvout_vip_set_sel_input(tvout, main_path,
 298                         sel_input_logic_inverted, STI_TVOUT_VIDEO_OUT_RGB);
 299 }
 300
 301 /**
 302  * Start HDF VIP and HD DAC
 303  *
 304  * @tvout: pointer on tvout structure
 305  * @main_path: true if main path has to be used in the vip configuration
 306  *        else aux path is used.
 307  */
 308 static void tvout_hda_start(struct sti_tvout *tvout, bool main_path)
 309 {
 310         struct device_node *node = tvout->dev->of_node;
 311         bool sel_input_logic_inverted = false;
 312
 313         dev_dbg(tvout->dev, "%s\n", __func__);
 314
 315         if (!main_path) {
 316                 DRM_ERROR("HD Analog on aux not implemented\n");
 317                 return;
 318         }
 319
 320         DRM_DEBUG_DRIVER("main vip for HDF\n");
 321
 322         /* set color channel order */
 323         tvout_vip_set_color_order(tvout->regs + TVO_VIP_HDF,
 324                                   TVO_VIP_REORDER_CR_R_SEL,
 325                                   TVO_VIP_REORDER_Y_G_SEL,
 326                                   TVO_VIP_REORDER_CB_B_SEL);
 327
 328         /* set clipping mode (Limited range RGB/Y) */
 329         tvout_vip_set_clip_mode(tvout->regs + TVO_VIP_HDF,
 330                                 TVO_VIP_CLIP_LIMITED_RANGE_CB_CR);
 331
 332         /* set round mode (rounded to 10-bit per component) */
 333         tvout_vip_set_rnd(tvout->regs + TVO_VIP_HDF, TVO_VIP_RND_10BIT_ROUNDED);
 334
 335         if (of_device_is_compatible(node, "st,stih407-tvout")) {
 336                 /* set input video format */
 337                 tvout_vip_set_in_vid_fmt(tvout, TVO_IN_FMT_SIGNED);
 338                 sel_input_logic_inverted = true;
 339         }
 340
 341         /* Input selection */
 342         tvout_vip_set_sel_input(tvout->regs + TVO_VIP_HDF,
 343                                 main_path,
 344                                 sel_input_logic_inverted,
 345                                 STI_TVOUT_VIDEO_OUT_YUV);
 346
 347         /* select the input sync for HD analog = VTG set 3
 348          * and HD DCS = VTG set 2 */
 349         tvout_write(tvout,
 350                 (TVO_SYNC_MAIN_VTG_SET_2 << TVO_SYNC_HD_DCS_SHIFT)
 351                 | TVO_SYNC_MAIN_VTG_SET_3,
 352                 TVO_HD_SYNC_SEL);
 353
 354         /* power up HD DAC */
 355         tvout_write(tvout, 0, TVO_HD_DAC_CFG_OFF);
 356 }
 357
 358 static void sti_tvout_encoder_dpms(struct drm_encoder *encoder, int mode)
 359 {
 360 }
 361
 362 static bool sti_tvout_encoder_mode_fixup(struct drm_encoder *encoder,
 363                                        const struct drm_display_mode *mode,
 364                                        struct drm_display_mode *adjusted_mode)
 365 {
 366         return true;
 367 }
 368
 369 static void sti_tvout_encoder_mode_set(struct drm_encoder *encoder,
 370                                        struct drm_display_mode *mode,
 371                                        struct drm_display_mode *adjusted_mode)
 372 {
 373 }
 374
 375 static void sti_tvout_encoder_prepare(struct drm_encoder *encoder)
 376 {
 377 }
 378
 379 static void sti_tvout_encoder_destroy(struct drm_encoder *encoder)
 380 {
 381         struct sti_tvout_encoder *sti_encoder = to_sti_tvout_encoder(encoder);
 382
 383         drm_encoder_cleanup(encoder);
 384         kfree(sti_encoder);
 385 }
 386
 387 static const struct drm_encoder_funcs sti_tvout_encoder_funcs = {
 388         .destroy = sti_tvout_encoder_destroy,
 389 };
 390
 391 static void sti_hda_encoder_commit(struct drm_encoder *encoder)
 392 {
 393         struct sti_tvout *tvout = to_sti_tvout(encoder);
 394
 395         tvout_hda_start(tvout, true);
 396 }
 397
 398 static void sti_hda_encoder_disable(struct drm_encoder *encoder)
 399 {
 400         struct sti_tvout *tvout = to_sti_tvout(encoder);
 401
 402         /* reset VIP register */
 403         tvout_write(tvout, 0x0, TVO_VIP_HDF);
 404
 405         /* power down HD DAC */
 406         tvout_write(tvout, 1, TVO_HD_DAC_CFG_OFF);
 407 }
 408
 409 static const struct drm_encoder_helper_funcs sti_hda_encoder_helper_funcs = {
 410         .dpms = sti_tvout_encoder_dpms,
 411         .mode_fixup = sti_tvout_encoder_mode_fixup,
 412         .mode_set = sti_tvout_encoder_mode_set,
 413         .prepare = sti_tvout_encoder_prepare,
 414         .commit = sti_hda_encoder_commit,
 415         .disable = sti_hda_encoder_disable,
 416 };
 417
 418 static struct drm_encoder *sti_tvout_create_hda_encoder(struct drm_device *dev,
 419                 struct sti_tvout *tvout)
 420 {
 421         struct sti_tvout_encoder *encoder;
 422         struct drm_encoder *drm_encoder;
 423
 424         encoder = devm_kzalloc(tvout->dev, sizeof(*encoder), GFP_KERNEL);
 425         if (!encoder)
 426                 return NULL;
 427
 428         encoder->tvout = tvout;
 429
 430         drm_encoder = (struct drm_encoder *) encoder;
 431
 432         drm_encoder->possible_crtcs = ENCODER_MAIN_CRTC_MASK;
 433         drm_encoder->possible_clones = 1 << 0;
 434
 435         drm_encoder_init(dev, drm_encoder,
 436                         &sti_tvout_encoder_funcs, DRM_MODE_ENCODER_DAC);
 437
 438         drm_encoder_helper_add(drm_encoder, &sti_hda_encoder_helper_funcs);
 439
 440         return drm_encoder;
 441 }
 442
 443 static void sti_hdmi_encoder_commit(struct drm_encoder *encoder)
 444 {
 445         struct sti_tvout *tvout = to_sti_tvout(encoder);
 446
 447         tvout_hdmi_start(tvout, true);
 448 }
 449
 450 static void sti_hdmi_encoder_disable(struct drm_encoder *encoder)
 451 {
 452         struct sti_tvout *tvout = to_sti_tvout(encoder);
 453
 454         /* reset VIP register */
 455         tvout_write(tvout, 0x0, TVO_VIP_HDMI);
 456 }
 457
 458 static const struct drm_encoder_helper_funcs sti_hdmi_encoder_helper_funcs = {
 459         .dpms = sti_tvout_encoder_dpms,
 460         .mode_fixup = sti_tvout_encoder_mode_fixup,
 461         .mode_set = sti_tvout_encoder_mode_set,
 462         .prepare = sti_tvout_encoder_prepare,
 463         .commit = sti_hdmi_encoder_commit,
 464         .disable = sti_hdmi_encoder_disable,
 465 };
 466
 467 static struct drm_encoder *sti_tvout_create_hdmi_encoder(struct drm_device *dev,
 468                 struct sti_tvout *tvout)
 469 {
 470         struct sti_tvout_encoder *encoder;
 471         struct drm_encoder *drm_encoder;
 472
 473         encoder = devm_kzalloc(tvout->dev, sizeof(*encoder), GFP_KERNEL);
 474         if (!encoder)
 475                 return NULL;
 476
 477         encoder->tvout = tvout;
 478
 479         drm_encoder = (struct drm_encoder *) encoder;
 480
 481         drm_encoder->possible_crtcs = ENCODER_MAIN_CRTC_MASK;
 482         drm_encoder->possible_clones = 1 << 1;
 483
 484         drm_encoder_init(dev, drm_encoder,
 485                         &sti_tvout_encoder_funcs, DRM_MODE_ENCODER_TMDS);
 486
 487         drm_encoder_helper_add(drm_encoder, &sti_hdmi_encoder_helper_funcs);
 488
 489         return drm_encoder;
 490 }
 491
 492 static void sti_tvout_create_encoders(struct drm_device *dev,
 493                 struct sti_tvout *tvout)
 494 {
 495         tvout->hdmi = sti_tvout_create_hdmi_encoder(dev, tvout);
 496         tvout->hda = sti_tvout_create_hda_encoder(dev, tvout);
 497 }
 498
 499 static void sti_tvout_destroy_encoders(struct sti_tvout *tvout)
 500 {
 501         if (tvout->hdmi)
 502                 drm_encoder_cleanup(tvout->hdmi);
 503         tvout->hdmi = NULL;
 504
 505         if (tvout->hda)
 506                 drm_encoder_cleanup(tvout->hda);
 507         tvout->hda = NULL;
 508 }
 509
 510 static int sti_tvout_bind(struct device *dev, struct device *master, void *data)
 511 {
 512         struct sti_tvout *tvout = dev_get_drvdata(dev);
 513         struct drm_device *drm_dev = data;
 514         unsigned int i;
 515         int ret;
 516
 517         tvout->drm_dev = drm_dev;
 518
 519         /* set preformatter matrix */
 520         for (i = 0; i < 8; i++) {
 521                 tvout_write(tvout, rgb_to_ycbcr_601[i],
 522                         TVO_CSC_MAIN_M0 + (i * 4));
 523                 tvout_write(tvout, rgb_to_ycbcr_601[i],
 524                         TVO_CSC_AUX_M0 + (i * 4));
 525         }
 526
 527         sti_tvout_create_encoders(drm_dev, tvout);
 528
 529         ret = component_bind_all(dev, drm_dev);
 530         if (ret)
 531                 sti_tvout_destroy_encoders(tvout);
 532
 533         return ret;
 534 }
 535
 536 static void sti_tvout_unbind(struct device *dev, struct device *master,
 537         void *data)
 538 {
 539         /* do nothing */
 540 }
 541
 542 static const struct component_ops sti_tvout_ops = {
 543         .bind   = sti_tvout_bind,
 544         .unbind = sti_tvout_unbind,
 545 };
 546
 547 static int compare_of(struct device *dev, void *data)
 548 {
 549         return dev->of_node == data;
 550 }
 551
 552 static int sti_tvout_master_bind(struct device *dev)
 553 {
 554         return 0;
 555 }
 556
 557 static void sti_tvout_master_unbind(struct device *dev)
 558 {
 559         /* do nothing */
 560 }
 561
 562 static const struct component_master_ops sti_tvout_master_ops = {
 563         .bind = sti_tvout_master_bind,
 564         .unbind = sti_tvout_master_unbind,
 565 };
 566
 567 static int sti_tvout_probe(struct platform_device *pdev)
 568 {
 569         struct device *dev = &pdev->dev;
 570         struct device_node *node = dev->of_node;
 571         struct sti_tvout *tvout;
 572         struct resource *res;
 573         struct device_node *child_np;
 574         struct component_match *match = NULL;
 575
 576         DRM_INFO("%s\n", __func__);
 577
 578         if (!node)
 579                 return -ENODEV;
 580
 581         tvout = devm_kzalloc(dev, sizeof(*tvout), GFP_KERNEL);
 582         if (!tvout)
 583                 return -ENOMEM;
 584
 585         tvout->dev = dev;
 586
 587         /* get Memory ressources */
 588         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tvout-reg");
 589         if (!res) {
 590                 DRM_ERROR("Invalid glue resource\n");
 591                 return -ENOMEM;
 592         }
 593         tvout->regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
 594         if (IS_ERR(tvout->regs))
 595                 return PTR_ERR(tvout->regs);
 596
 597         /* get reset resources */
 598         tvout->reset = devm_reset_control_get(dev, "tvout");
 599         /* take tvout out of reset */
 600         if (!IS_ERR(tvout->reset))
 601                 reset_control_deassert(tvout->reset);
 602
 603         platform_set_drvdata(pdev, tvout);
 604
 605         of_platform_populate(node, NULL, NULL, dev);
 606
 607         child_np = of_get_next_available_child(node, NULL);
 608
 609         while (child_np) {
 610                 component_match_add(dev, &match, compare_of, child_np);
 611                 of_node_put(child_np);
 612                 child_np = of_get_next_available_child(node, child_np);
 613         }
 614
 615         component_master_add_with_match(dev, &sti_tvout_master_ops, match);
 616
 617         return component_add(dev, &sti_tvout_ops);
 618 }
 619
 620 static int sti_tvout_remove(struct platform_device *pdev)
 621 {
 622         component_master_del(&pdev->dev, &sti_tvout_master_ops);
 623         component_del(&pdev->dev, &sti_tvout_ops);
 624         return 0;
 625 }
 626
 627 static struct of_device_id tvout_of_match[] = {
 628         { .compatible = "st,stih416-tvout", },
 629         { .compatible = "st,stih407-tvout", },
 630         { /* end node */ }
 631 };
 632 MODULE_DEVICE_TABLE(of, tvout_of_match);
 633
 634 struct platform_driver sti_tvout_driver = {
 635         .driver = {
 636                 .name = "sti-tvout",
 637                 .owner = THIS_MODULE,
 638                 .of_match_table = tvout_of_match,
 639         },
 640         .probe = sti_tvout_probe,
 641         .remove = sti_tvout_remove,
 642 };
 643
 644 module_platform_driver(sti_tvout_driver);
 645
 646 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
 647 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
 648 MODULE_LICENSE("GPL");