drivers/gpu/drm/sun4i/sun4i_tv.c

   1 /*
   2  * Copyright (C) 2015 Free Electrons
   3  * Copyright (C) 2015 NextThing Co
   4  *
   5  * Maxime Ripard <maxime.ripard@free-electrons.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  */
  12
  13 #include <linux/clk.h>
  14 #include <linux/component.h>
  15 #include <linux/of_address.h>
  16 #include <linux/regmap.h>
  17 #include <linux/reset.h>
  18
  19 #include <drm/drmP.h>
  20 #include <drm/drm_atomic_helper.h>
  21 #include <drm/drm_of.h>
  22 #include <drm/drm_panel.h>
  23 #include <drm/drm_probe_helper.h>
  24
  25 #include "sun4i_crtc.h"
  26 #include "sun4i_drv.h"
  27 #include "sunxi_engine.h"
  28
  29 #define SUN4I_TVE_EN_REG                0x000
  30 #define SUN4I_TVE_EN_DAC_MAP_MASK               GENMASK(19, 4)
  31 #define SUN4I_TVE_EN_DAC_MAP(dac, out)          (((out) & 0xf) << (dac + 1) * 4)
  32 #define SUN4I_TVE_EN_ENABLE                     BIT(0)
  33
  34 #define SUN4I_TVE_CFG0_REG              0x004
  35 #define SUN4I_TVE_CFG0_DAC_CONTROL_54M          BIT(26)
  36 #define SUN4I_TVE_CFG0_CORE_DATAPATH_54M        BIT(25)
  37 #define SUN4I_TVE_CFG0_CORE_CONTROL_54M         BIT(24)
  38 #define SUN4I_TVE_CFG0_YC_EN                    BIT(17)
  39 #define SUN4I_TVE_CFG0_COMP_EN                  BIT(16)
  40 #define SUN4I_TVE_CFG0_RES(x)                   ((x) & 0xf)
  41 #define SUN4I_TVE_CFG0_RES_480i                 SUN4I_TVE_CFG0_RES(0)
  42 #define SUN4I_TVE_CFG0_RES_576i                 SUN4I_TVE_CFG0_RES(1)
  43
  44 #define SUN4I_TVE_DAC0_REG              0x008
  45 #define SUN4I_TVE_DAC0_CLOCK_INVERT             BIT(24)
  46 #define SUN4I_TVE_DAC0_LUMA(x)                  (((x) & 3) << 20)
  47 #define SUN4I_TVE_DAC0_LUMA_0_4                 SUN4I_TVE_DAC0_LUMA(3)
  48 #define SUN4I_TVE_DAC0_CHROMA(x)                (((x) & 3) << 18)
  49 #define SUN4I_TVE_DAC0_CHROMA_0_75              SUN4I_TVE_DAC0_CHROMA(3)
  50 #define SUN4I_TVE_DAC0_INTERNAL_DAC(x)          (((x) & 3) << 16)
  51 #define SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS   SUN4I_TVE_DAC0_INTERNAL_DAC(3)
  52 #define SUN4I_TVE_DAC0_DAC_EN(dac)              BIT(dac)
  53
  54 #define SUN4I_TVE_NOTCH_REG             0x00c
  55 #define SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(dac, x) ((4 - (x)) << (dac * 3))
  56
  57 #define SUN4I_TVE_CHROMA_FREQ_REG       0x010
  58
  59 #define SUN4I_TVE_PORCH_REG             0x014
  60 #define SUN4I_TVE_PORCH_BACK(x)                 ((x) << 16)
  61 #define SUN4I_TVE_PORCH_FRONT(x)                (x)
  62
  63 #define SUN4I_TVE_LINE_REG              0x01c
  64 #define SUN4I_TVE_LINE_FIRST(x)                 ((x) << 16)
  65 #define SUN4I_TVE_LINE_NUMBER(x)                (x)
  66
  67 #define SUN4I_TVE_LEVEL_REG             0x020
  68 #define SUN4I_TVE_LEVEL_BLANK(x)                ((x) << 16)
  69 #define SUN4I_TVE_LEVEL_BLACK(x)                (x)
  70
  71 #define SUN4I_TVE_DAC1_REG              0x024
  72 #define SUN4I_TVE_DAC1_AMPLITUDE(dac, x)        ((x) << (dac * 8))
  73
  74 #define SUN4I_TVE_DETECT_STA_REG        0x038
  75 #define SUN4I_TVE_DETECT_STA_DAC(dac)           BIT((dac * 8))
  76 #define SUN4I_TVE_DETECT_STA_UNCONNECTED                0
  77 #define SUN4I_TVE_DETECT_STA_CONNECTED                  1
  78 #define SUN4I_TVE_DETECT_STA_GROUND                     2
  79
  80 #define SUN4I_TVE_CB_CR_LVL_REG         0x10c
  81 #define SUN4I_TVE_CB_CR_LVL_CR_BURST(x)         ((x) << 8)
  82 #define SUN4I_TVE_CB_CR_LVL_CB_BURST(x)         (x)
  83
  84 #define SUN4I_TVE_TINT_BURST_PHASE_REG  0x110
  85 #define SUN4I_TVE_TINT_BURST_PHASE_CHROMA(x)    (x)
  86
  87 #define SUN4I_TVE_BURST_WIDTH_REG       0x114
  88 #define SUN4I_TVE_BURST_WIDTH_BREEZEWAY(x)      ((x) << 16)
  89 #define SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(x)    ((x) << 8)
  90 #define SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(x)    (x)
  91
  92 #define SUN4I_TVE_CB_CR_GAIN_REG        0x118
  93 #define SUN4I_TVE_CB_CR_GAIN_CR(x)              ((x) << 8)
  94 #define SUN4I_TVE_CB_CR_GAIN_CB(x)              (x)
  95
  96 #define SUN4I_TVE_SYNC_VBI_REG          0x11c
  97 #define SUN4I_TVE_SYNC_VBI_SYNC(x)              ((x) << 16)
  98 #define SUN4I_TVE_SYNC_VBI_VBLANK(x)            (x)
  99
 100 #define SUN4I_TVE_ACTIVE_LINE_REG       0x124
 101 #define SUN4I_TVE_ACTIVE_LINE(x)                (x)
 102
 103 #define SUN4I_TVE_CHROMA_REG            0x128
 104 #define SUN4I_TVE_CHROMA_COMP_GAIN(x)           ((x) & 3)
 105 #define SUN4I_TVE_CHROMA_COMP_GAIN_50           SUN4I_TVE_CHROMA_COMP_GAIN(2)
 106
 107 #define SUN4I_TVE_12C_REG               0x12c
 108 #define SUN4I_TVE_12C_NOTCH_WIDTH_WIDE          BIT(8)
 109 #define SUN4I_TVE_12C_COMP_YUV_EN               BIT(0)
 110
 111 #define SUN4I_TVE_RESYNC_REG            0x130
 112 #define SUN4I_TVE_RESYNC_FIELD                  BIT(31)
 113 #define SUN4I_TVE_RESYNC_LINE(x)                ((x) << 16)
 114 #define SUN4I_TVE_RESYNC_PIXEL(x)               (x)
 115
 116 #define SUN4I_TVE_SLAVE_REG             0x134
 117
 118 #define SUN4I_TVE_WSS_DATA2_REG         0x244
 119
 120 struct color_gains {
 121         u16     cb;
 122         u16     cr;
 123 };
 124
 125 struct burst_levels {
 126         u16     cb;
 127         u16     cr;
 128 };
 129
 130 struct video_levels {
 131         u16     black;
 132         u16     blank;
 133 };
 134
 135 struct resync_parameters {
 136         bool    field;
 137         u16     line;
 138         u16     pixel;
 139 };
 140
 141 struct tv_mode {
 142         char            *name;
 143
 144         u32             mode;
 145         u32             chroma_freq;
 146         u16             back_porch;
 147         u16             front_porch;
 148         u16             line_number;
 149         u16             vblank_level;
 150
 151         u32             hdisplay;
 152         u16             hfront_porch;
 153         u16             hsync_len;
 154         u16             hback_porch;
 155
 156         u32             vdisplay;
 157         u16             vfront_porch;
 158         u16             vsync_len;
 159         u16             vback_porch;
 160
 161         bool            yc_en;
 162         bool            dac3_en;
 163         bool            dac_bit25_en;
 164
 165         const struct color_gains        *color_gains;
 166         const struct burst_levels       *burst_levels;
 167         const struct video_levels       *video_levels;
 168         const struct resync_parameters  *resync_params;
 169 };
 170
 171 struct sun4i_tv {
 172         struct drm_connector    connector;
 173         struct drm_encoder      encoder;
 174
 175         struct clk              *clk;
 176         struct regmap           *regs;
 177         struct reset_control    *reset;
 178
 179         struct sun4i_drv        *drv;
 180 };
 181
 182 static const struct video_levels ntsc_video_levels = {
 183         .black = 282,   .blank = 240,
 184 };
 185
 186 static const struct video_levels pal_video_levels = {
 187         .black = 252,   .blank = 252,
 188 };
 189
 190 static const struct burst_levels ntsc_burst_levels = {
 191         .cb = 79,       .cr = 0,
 192 };
 193
 194 static const struct burst_levels pal_burst_levels = {
 195         .cb = 40,       .cr = 40,
 196 };
 197
 198 static const struct color_gains ntsc_color_gains = {
 199         .cb = 160,      .cr = 160,
 200 };
 201
 202 static const struct color_gains pal_color_gains = {
 203         .cb = 224,      .cr = 224,
 204 };
 205
 206 static const struct resync_parameters ntsc_resync_parameters = {
 207         .field = false, .line = 14,     .pixel = 12,
 208 };
 209
 210 static const struct resync_parameters pal_resync_parameters = {
 211         .field = true,  .line = 13,     .pixel = 12,
 212 };
 213
 214 static const struct tv_mode tv_modes[] = {
 215         {
 216                 .name           = "NTSC",
 217                 .mode           = SUN4I_TVE_CFG0_RES_480i,
 218                 .chroma_freq    = 0x21f07c1f,
 219                 .yc_en          = true,
 220                 .dac3_en        = true,
 221                 .dac_bit25_en   = true,
 222
 223                 .back_porch     = 118,
 224                 .front_porch    = 32,
 225                 .line_number    = 525,
 226
 227                 .hdisplay       = 720,
 228                 .hfront_porch   = 18,
 229                 .hsync_len      = 2,
 230                 .hback_porch    = 118,
 231
 232                 .vdisplay       = 480,
 233                 .vfront_porch   = 26,
 234                 .vsync_len      = 2,
 235                 .vback_porch    = 17,
 236
 237                 .vblank_level   = 240,
 238
 239                 .color_gains    = &ntsc_color_gains,
 240                 .burst_levels   = &ntsc_burst_levels,
 241                 .video_levels   = &ntsc_video_levels,
 242                 .resync_params  = &ntsc_resync_parameters,
 243         },
 244         {
 245                 .name           = "PAL",
 246                 .mode           = SUN4I_TVE_CFG0_RES_576i,
 247                 .chroma_freq    = 0x2a098acb,
 248
 249                 .back_porch     = 138,
 250                 .front_porch    = 24,
 251                 .line_number    = 625,
 252
 253                 .hdisplay       = 720,
 254                 .hfront_porch   = 3,
 255                 .hsync_len      = 2,
 256                 .hback_porch    = 139,
 257
 258                 .vdisplay       = 576,
 259                 .vfront_porch   = 28,
 260                 .vsync_len      = 2,
 261                 .vback_porch    = 19,
 262
 263                 .vblank_level   = 252,
 264
 265                 .color_gains    = &pal_color_gains,
 266                 .burst_levels   = &pal_burst_levels,
 267                 .video_levels   = &pal_video_levels,
 268                 .resync_params  = &pal_resync_parameters,
 269         },
 270 };
 271
 272 static inline struct sun4i_tv *
 273 drm_encoder_to_sun4i_tv(struct drm_encoder *encoder)
 274 {
 275         return container_of(encoder, struct sun4i_tv,
 276                             encoder);
 277 }
 278
 279 static inline struct sun4i_tv *
 280 drm_connector_to_sun4i_tv(struct drm_connector *connector)
 281 {
 282         return container_of(connector, struct sun4i_tv,
 283                             connector);
 284 }
 285
 286 /*
 287  * FIXME: If only the drm_display_mode private field was usable, this
 288  * could go away...
 289  *
 290  * So far, it doesn't seem to be preserved when the mode is passed by
 291  * to mode_set for some reason.
 292  */
 293 static const struct tv_mode *sun4i_tv_find_tv_by_mode(const struct drm_display_mode *mode)
 294 {
 295         int i;
 296
 297         /* First try to identify the mode by name */
 298         for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
 299                 const struct tv_mode *tv_mode = &tv_modes[i];
 300
 301                 DRM_DEBUG_DRIVER("Comparing mode %s vs %s",
 302                                  mode->name, tv_mode->name);
 303
 304                 if (!strcmp(mode->name, tv_mode->name))
 305                         return tv_mode;
 306         }
 307
 308         /* Then by number of lines */
 309         for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
 310                 const struct tv_mode *tv_mode = &tv_modes[i];
 311
 312                 DRM_DEBUG_DRIVER("Comparing mode %s vs %s (X: %d vs %d)",
 313                                  mode->name, tv_mode->name,
 314                                  mode->vdisplay, tv_mode->vdisplay);
 315
 316                 if (mode->vdisplay == tv_mode->vdisplay)
 317                         return tv_mode;
 318         }
 319
 320         return NULL;
 321 }
 322
 323 static void sun4i_tv_mode_to_drm_mode(const struct tv_mode *tv_mode,
 324                                       struct drm_display_mode *mode)
 325 {
 326         DRM_DEBUG_DRIVER("Creating mode %s\n", mode->name);
 327
 328         mode->type = DRM_MODE_TYPE_DRIVER;
 329         mode->clock = 13500;
 330         mode->flags = DRM_MODE_FLAG_INTERLACE;
 331
 332         mode->hdisplay = tv_mode->hdisplay;
 333         mode->hsync_start = mode->hdisplay + tv_mode->hfront_porch;
 334         mode->hsync_end = mode->hsync_start + tv_mode->hsync_len;
 335         mode->htotal = mode->hsync_end  + tv_mode->hback_porch;
 336
 337         mode->vdisplay = tv_mode->vdisplay;
 338         mode->vsync_start = mode->vdisplay + tv_mode->vfront_porch;
 339         mode->vsync_end = mode->vsync_start + tv_mode->vsync_len;
 340         mode->vtotal = mode->vsync_end  + tv_mode->vback_porch;
 341 }
 342
 343 static void sun4i_tv_disable(struct drm_encoder *encoder)
 344 {
 345         struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
 346         struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
 347
 348         DRM_DEBUG_DRIVER("Disabling the TV Output\n");
 349
 350         regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
 351                            SUN4I_TVE_EN_ENABLE,
 352                            0);
 353
 354         sunxi_engine_disable_color_correction(crtc->engine);
 355 }
 356
 357 static void sun4i_tv_enable(struct drm_encoder *encoder)
 358 {
 359         struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
 360         struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
 361
 362         DRM_DEBUG_DRIVER("Enabling the TV Output\n");
 363
 364         sunxi_engine_apply_color_correction(crtc->engine);
 365
 366         regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
 367                            SUN4I_TVE_EN_ENABLE,
 368                            SUN4I_TVE_EN_ENABLE);
 369 }
 370
 371 static void sun4i_tv_mode_set(struct drm_encoder *encoder,
 372                               struct drm_display_mode *mode,
 373                               struct drm_display_mode *adjusted_mode)
 374 {
 375         struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
 376         const struct tv_mode *tv_mode = sun4i_tv_find_tv_by_mode(mode);
 377
 378         /* Enable and map the DAC to the output */
 379         regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
 380                            SUN4I_TVE_EN_DAC_MAP_MASK,
 381                            SUN4I_TVE_EN_DAC_MAP(0, 1) |
 382                            SUN4I_TVE_EN_DAC_MAP(1, 2) |
 383                            SUN4I_TVE_EN_DAC_MAP(2, 3) |
 384                            SUN4I_TVE_EN_DAC_MAP(3, 4));
 385
 386         /* Set PAL settings */
 387         regmap_write(tv->regs, SUN4I_TVE_CFG0_REG,
 388                      tv_mode->mode |
 389                      (tv_mode->yc_en ? SUN4I_TVE_CFG0_YC_EN : 0) |
 390                      SUN4I_TVE_CFG0_COMP_EN |
 391                      SUN4I_TVE_CFG0_DAC_CONTROL_54M |
 392                      SUN4I_TVE_CFG0_CORE_DATAPATH_54M |
 393                      SUN4I_TVE_CFG0_CORE_CONTROL_54M);
 394
 395         /* Configure the DAC for a composite output */
 396         regmap_write(tv->regs, SUN4I_TVE_DAC0_REG,
 397                      SUN4I_TVE_DAC0_DAC_EN(0) |
 398                      (tv_mode->dac3_en ? SUN4I_TVE_DAC0_DAC_EN(3) : 0) |
 399                      SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS |
 400                      SUN4I_TVE_DAC0_CHROMA_0_75 |
 401                      SUN4I_TVE_DAC0_LUMA_0_4 |
 402                      SUN4I_TVE_DAC0_CLOCK_INVERT |
 403                      (tv_mode->dac_bit25_en ? BIT(25) : 0) |
 404                      BIT(30));
 405
 406         /* Configure the sample delay between DAC0 and the other DAC */
 407         regmap_write(tv->regs, SUN4I_TVE_NOTCH_REG,
 408                      SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(1, 0) |
 409                      SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(2, 0));
 410
 411         regmap_write(tv->regs, SUN4I_TVE_CHROMA_FREQ_REG,
 412                      tv_mode->chroma_freq);
 413
 414         /* Set the front and back porch */
 415         regmap_write(tv->regs, SUN4I_TVE_PORCH_REG,
 416                      SUN4I_TVE_PORCH_BACK(tv_mode->back_porch) |
 417                      SUN4I_TVE_PORCH_FRONT(tv_mode->front_porch));
 418
 419         /* Set the lines setup */
 420         regmap_write(tv->regs, SUN4I_TVE_LINE_REG,
 421                      SUN4I_TVE_LINE_FIRST(22) |
 422                      SUN4I_TVE_LINE_NUMBER(tv_mode->line_number));
 423
 424         regmap_write(tv->regs, SUN4I_TVE_LEVEL_REG,
 425                      SUN4I_TVE_LEVEL_BLANK(tv_mode->video_levels->blank) |
 426                      SUN4I_TVE_LEVEL_BLACK(tv_mode->video_levels->black));
 427
 428         regmap_write(tv->regs, SUN4I_TVE_DAC1_REG,
 429                      SUN4I_TVE_DAC1_AMPLITUDE(0, 0x18) |
 430                      SUN4I_TVE_DAC1_AMPLITUDE(1, 0x18) |
 431                      SUN4I_TVE_DAC1_AMPLITUDE(2, 0x18) |
 432                      SUN4I_TVE_DAC1_AMPLITUDE(3, 0x18));
 433
 434         regmap_write(tv->regs, SUN4I_TVE_CB_CR_LVL_REG,
 435                      SUN4I_TVE_CB_CR_LVL_CB_BURST(tv_mode->burst_levels->cb) |
 436                      SUN4I_TVE_CB_CR_LVL_CR_BURST(tv_mode->burst_levels->cr));
 437
 438         /* Set burst width for a composite output */
 439         regmap_write(tv->regs, SUN4I_TVE_BURST_WIDTH_REG,
 440                      SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(126) |
 441                      SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(68) |
 442                      SUN4I_TVE_BURST_WIDTH_BREEZEWAY(22));
 443
 444         regmap_write(tv->regs, SUN4I_TVE_CB_CR_GAIN_REG,
 445                      SUN4I_TVE_CB_CR_GAIN_CB(tv_mode->color_gains->cb) |
 446                      SUN4I_TVE_CB_CR_GAIN_CR(tv_mode->color_gains->cr));
 447
 448         regmap_write(tv->regs, SUN4I_TVE_SYNC_VBI_REG,
 449                      SUN4I_TVE_SYNC_VBI_SYNC(0x10) |
 450                      SUN4I_TVE_SYNC_VBI_VBLANK(tv_mode->vblank_level));
 451
 452         regmap_write(tv->regs, SUN4I_TVE_ACTIVE_LINE_REG,
 453                      SUN4I_TVE_ACTIVE_LINE(1440));
 454
 455         /* Set composite chroma gain to 50 % */
 456         regmap_write(tv->regs, SUN4I_TVE_CHROMA_REG,
 457                      SUN4I_TVE_CHROMA_COMP_GAIN_50);
 458
 459         regmap_write(tv->regs, SUN4I_TVE_12C_REG,
 460                      SUN4I_TVE_12C_COMP_YUV_EN |
 461                      SUN4I_TVE_12C_NOTCH_WIDTH_WIDE);
 462
 463         regmap_write(tv->regs, SUN4I_TVE_RESYNC_REG,
 464                      SUN4I_TVE_RESYNC_PIXEL(tv_mode->resync_params->pixel) |
 465                      SUN4I_TVE_RESYNC_LINE(tv_mode->resync_params->line) |
 466                      (tv_mode->resync_params->field ?
 467                       SUN4I_TVE_RESYNC_FIELD : 0));
 468
 469         regmap_write(tv->regs, SUN4I_TVE_SLAVE_REG, 0);
 470 }
 471
 472 static struct drm_encoder_helper_funcs sun4i_tv_helper_funcs = {
 473         .disable        = sun4i_tv_disable,
 474         .enable         = sun4i_tv_enable,
 475         .mode_set       = sun4i_tv_mode_set,
 476 };
 477
 478 static void sun4i_tv_destroy(struct drm_encoder *encoder)
 479 {
 480         drm_encoder_cleanup(encoder);
 481 }
 482
 483 static struct drm_encoder_funcs sun4i_tv_funcs = {
 484         .destroy        = sun4i_tv_destroy,
 485 };
 486
 487 static int sun4i_tv_comp_get_modes(struct drm_connector *connector)
 488 {
 489         int i;
 490
 491         for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
 492                 struct drm_display_mode *mode;
 493                 const struct tv_mode *tv_mode = &tv_modes[i];
 494
 495                 mode = drm_mode_create(connector->dev);
 496                 if (!mode) {
 497                         DRM_ERROR("Failed to create a new display mode\n");
 498                         return 0;
 499                 }
 500
 501                 strcpy(mode->name, tv_mode->name);
 502
 503                 sun4i_tv_mode_to_drm_mode(tv_mode, mode);
 504                 drm_mode_probed_add(connector, mode);
 505         }
 506
 507         return i;
 508 }
 509
 510 static int sun4i_tv_comp_mode_valid(struct drm_connector *connector,
 511                                     struct drm_display_mode *mode)
 512 {
 513         /* TODO */
 514         return MODE_OK;
 515 }
 516
 517 static struct drm_connector_helper_funcs sun4i_tv_comp_connector_helper_funcs = {
 518         .get_modes      = sun4i_tv_comp_get_modes,
 519         .mode_valid     = sun4i_tv_comp_mode_valid,
 520 };
 521
 522 static void
 523 sun4i_tv_comp_connector_destroy(struct drm_connector *connector)
 524 {
 525         drm_connector_cleanup(connector);
 526 }
 527
 528 static const struct drm_connector_funcs sun4i_tv_comp_connector_funcs = {
 529         .fill_modes             = drm_helper_probe_single_connector_modes,
 530         .destroy                = sun4i_tv_comp_connector_destroy,
 531         .reset                  = drm_atomic_helper_connector_reset,
 532         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 533         .atomic_destroy_state   = drm_atomic_helper_connector_destroy_state,
 534 };
 535
 536 static struct regmap_config sun4i_tv_regmap_config = {
 537         .reg_bits       = 32,
 538         .val_bits       = 32,
 539         .reg_stride     = 4,
 540         .max_register   = SUN4I_TVE_WSS_DATA2_REG,
 541         .name           = "tv-encoder",
 542 };
 543
 544 static int sun4i_tv_bind(struct device *dev, struct device *master,
 545                          void *data)
 546 {
 547         struct platform_device *pdev = to_platform_device(dev);
 548         struct drm_device *drm = data;
 549         struct sun4i_drv *drv = drm->dev_private;
 550         struct sun4i_tv *tv;
 551         struct resource *res;
 552         void __iomem *regs;
 553         int ret;
 554
 555         tv = devm_kzalloc(dev, sizeof(*tv), GFP_KERNEL);
 556         if (!tv)
 557                 return -ENOMEM;
 558         tv->drv = drv;
 559         dev_set_drvdata(dev, tv);
 560
 561         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 562         regs = devm_ioremap_resource(dev, res);
 563         if (IS_ERR(regs)) {
 564                 dev_err(dev, "Couldn't map the TV encoder registers\n");
 565                 return PTR_ERR(regs);
 566         }
 567
 568         tv->regs = devm_regmap_init_mmio(dev, regs,
 569                                          &sun4i_tv_regmap_config);
 570         if (IS_ERR(tv->regs)) {
 571                 dev_err(dev, "Couldn't create the TV encoder regmap\n");
 572                 return PTR_ERR(tv->regs);
 573         }
 574
 575         tv->reset = devm_reset_control_get(dev, NULL);
 576         if (IS_ERR(tv->reset)) {
 577                 dev_err(dev, "Couldn't get our reset line\n");
 578                 return PTR_ERR(tv->reset);
 579         }
 580
 581         ret = reset_control_deassert(tv->reset);
 582         if (ret) {
 583                 dev_err(dev, "Couldn't deassert our reset line\n");
 584                 return ret;
 585         }
 586
 587         tv->clk = devm_clk_get(dev, NULL);
 588         if (IS_ERR(tv->clk)) {
 589                 dev_err(dev, "Couldn't get the TV encoder clock\n");
 590                 ret = PTR_ERR(tv->clk);
 591                 goto err_assert_reset;
 592         }
 593         clk_prepare_enable(tv->clk);
 594
 595         drm_encoder_helper_add(&tv->encoder,
 596                                &sun4i_tv_helper_funcs);
 597         ret = drm_encoder_init(drm,
 598                                &tv->encoder,
 599                                &sun4i_tv_funcs,
 600                                DRM_MODE_ENCODER_TVDAC,
 601                                NULL);
 602         if (ret) {
 603                 dev_err(dev, "Couldn't initialise the TV encoder\n");
 604                 goto err_disable_clk;
 605         }
 606
 607         tv->encoder.possible_crtcs = drm_of_find_possible_crtcs(drm,
 608                                                                 dev->of_node);
 609         if (!tv->encoder.possible_crtcs) {
 610                 ret = -EPROBE_DEFER;
 611                 goto err_disable_clk;
 612         }
 613
 614         drm_connector_helper_add(&tv->connector,
 615                                  &sun4i_tv_comp_connector_helper_funcs);
 616         ret = drm_connector_init(drm, &tv->connector,
 617                                  &sun4i_tv_comp_connector_funcs,
 618                                  DRM_MODE_CONNECTOR_Composite);
 619         if (ret) {
 620                 dev_err(dev,
 621                         "Couldn't initialise the Composite connector\n");
 622                 goto err_cleanup_connector;
 623         }
 624         tv->connector.interlace_allowed = true;
 625
 626         drm_connector_attach_encoder(&tv->connector, &tv->encoder);
 627
 628         return 0;
 629
 630 err_cleanup_connector:
 631         drm_encoder_cleanup(&tv->encoder);
 632 err_disable_clk:
 633         clk_disable_unprepare(tv->clk);
 634 err_assert_reset:
 635         reset_control_assert(tv->reset);
 636         return ret;
 637 }
 638
 639 static void sun4i_tv_unbind(struct device *dev, struct device *master,
 640                             void *data)
 641 {
 642         struct sun4i_tv *tv = dev_get_drvdata(dev);
 643
 644         drm_connector_cleanup(&tv->connector);
 645         drm_encoder_cleanup(&tv->encoder);
 646         clk_disable_unprepare(tv->clk);
 647 }
 648
 649 static const struct component_ops sun4i_tv_ops = {
 650         .bind   = sun4i_tv_bind,
 651         .unbind = sun4i_tv_unbind,
 652 };
 653
 654 static int sun4i_tv_probe(struct platform_device *pdev)
 655 {
 656         return component_add(&pdev->dev, &sun4i_tv_ops);
 657 }
 658
 659 static int sun4i_tv_remove(struct platform_device *pdev)
 660 {
 661         component_del(&pdev->dev, &sun4i_tv_ops);
 662
 663         return 0;
 664 }
 665
 666 static const struct of_device_id sun4i_tv_of_table[] = {
 667         { .compatible = "allwinner,sun4i-a10-tv-encoder" },
 668         { }
 669 };
 670 MODULE_DEVICE_TABLE(of, sun4i_tv_of_table);
 671
 672 static struct platform_driver sun4i_tv_platform_driver = {
 673         .probe          = sun4i_tv_probe,
 674         .remove         = sun4i_tv_remove,
 675         .driver         = {
 676                 .name           = "sun4i-tve",
 677                 .of_match_table = sun4i_tv_of_table,
 678         },
 679 };
 680 module_platform_driver(sun4i_tv_platform_driver);
 681
 682 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
 683 MODULE_DESCRIPTION("Allwinner A10 TV Encoder Driver");
 684 MODULE_LICENSE("GPL");