drivers/gpu/drm/sti/sti_tvout.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) STMicroelectronics SA 2014
   4  * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
   5  *          Vincent Abriou <vincent.abriou@st.com>
   6  *          for STMicroelectronics.
   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 #include <linux/seq_file.h>
  16
  17 #include <drm/drmP.h>
  18 #include <drm/drm_crtc_helper.h>
  19
  20 #include "sti_crtc.h"
  21 #include "sti_drv.h"
  22 #include "sti_vtg.h"
  23
  24 /* glue registers */
  25 #define TVO_CSC_MAIN_M0                  0x000
  26 #define TVO_CSC_MAIN_M1                  0x004
  27 #define TVO_CSC_MAIN_M2                  0x008
  28 #define TVO_CSC_MAIN_M3                  0x00c
  29 #define TVO_CSC_MAIN_M4                  0x010
  30 #define TVO_CSC_MAIN_M5                  0x014
  31 #define TVO_CSC_MAIN_M6                  0x018
  32 #define TVO_CSC_MAIN_M7                  0x01c
  33 #define TVO_MAIN_IN_VID_FORMAT           0x030
  34 #define TVO_CSC_AUX_M0                   0x100
  35 #define TVO_CSC_AUX_M1                   0x104
  36 #define TVO_CSC_AUX_M2                   0x108
  37 #define TVO_CSC_AUX_M3                   0x10c
  38 #define TVO_CSC_AUX_M4                   0x110
  39 #define TVO_CSC_AUX_M5                   0x114
  40 #define TVO_CSC_AUX_M6                   0x118
  41 #define TVO_CSC_AUX_M7                   0x11c
  42 #define TVO_AUX_IN_VID_FORMAT            0x130
  43 #define TVO_VIP_HDF                      0x400
  44 #define TVO_HD_SYNC_SEL                  0x418
  45 #define TVO_HD_DAC_CFG_OFF               0x420
  46 #define TVO_VIP_HDMI                     0x500
  47 #define TVO_HDMI_FORCE_COLOR_0           0x504
  48 #define TVO_HDMI_FORCE_COLOR_1           0x508
  49 #define TVO_HDMI_CLIP_VALUE_B_CB         0x50c
  50 #define TVO_HDMI_CLIP_VALUE_Y_G          0x510
  51 #define TVO_HDMI_CLIP_VALUE_R_CR         0x514
  52 #define TVO_HDMI_SYNC_SEL                0x518
  53 #define TVO_HDMI_DFV_OBS                 0x540
  54 #define TVO_VIP_DVO                      0x600
  55 #define TVO_DVO_SYNC_SEL                 0x618
  56 #define TVO_DVO_CONFIG                   0x620
  57
  58 #define TVO_IN_FMT_SIGNED                BIT(0)
  59 #define TVO_SYNC_EXT                     BIT(4)
  60
  61 #define TVO_VIP_REORDER_R_SHIFT          24
  62 #define TVO_VIP_REORDER_G_SHIFT          20
  63 #define TVO_VIP_REORDER_B_SHIFT          16
  64 #define TVO_VIP_REORDER_MASK             0x3
  65 #define TVO_VIP_REORDER_Y_G_SEL          0
  66 #define TVO_VIP_REORDER_CB_B_SEL         1
  67 #define TVO_VIP_REORDER_CR_R_SEL         2
  68
  69 #define TVO_VIP_CLIP_SHIFT               8
  70 #define TVO_VIP_CLIP_MASK                0x7
  71 #define TVO_VIP_CLIP_DISABLED            0
  72 #define TVO_VIP_CLIP_EAV_SAV             1
  73 #define TVO_VIP_CLIP_LIMITED_RANGE_RGB_Y 2
  74 #define TVO_VIP_CLIP_LIMITED_RANGE_CB_CR 3
  75 #define TVO_VIP_CLIP_PROG_RANGE          4
  76
  77 #define TVO_VIP_RND_SHIFT                4
  78 #define TVO_VIP_RND_MASK                 0x3
  79 #define TVO_VIP_RND_8BIT_ROUNDED         0
  80 #define TVO_VIP_RND_10BIT_ROUNDED        1
  81 #define TVO_VIP_RND_12BIT_ROUNDED        2
  82
  83 #define TVO_VIP_SEL_INPUT_MASK           0xf
  84 #define TVO_VIP_SEL_INPUT_MAIN           0x0
  85 #define TVO_VIP_SEL_INPUT_AUX            0x8
  86 #define TVO_VIP_SEL_INPUT_FORCE_COLOR    0xf
  87 #define TVO_VIP_SEL_INPUT_BYPASS_MASK    0x1
  88 #define TVO_VIP_SEL_INPUT_BYPASSED       1
  89
  90 #define TVO_SYNC_MAIN_VTG_SET_REF        0x00
  91 #define TVO_SYNC_AUX_VTG_SET_REF         0x10
  92
  93 #define TVO_SYNC_HD_DCS_SHIFT            8
  94
  95 #define TVO_SYNC_DVO_PAD_HSYNC_SHIFT     8
  96 #define TVO_SYNC_DVO_PAD_VSYNC_SHIFT     16
  97
  98 #define ENCODER_CRTC_MASK                (BIT(0) | BIT(1))
  99
 100 #define TVO_MIN_HD_HEIGHT                720
 101
 102 /* enum listing the supported output data format */
 103 enum sti_tvout_video_out_type {
 104         STI_TVOUT_VIDEO_OUT_RGB,
 105         STI_TVOUT_VIDEO_OUT_YUV,
 106 };
 107
 108 struct sti_tvout {
 109         struct device *dev;
 110         struct drm_device *drm_dev;
 111         void __iomem *regs;
 112         struct reset_control *reset;
 113         struct drm_encoder *hdmi;
 114         struct drm_encoder *hda;
 115         struct drm_encoder *dvo;
 116         bool debugfs_registered;
 117 };
 118
 119 struct sti_tvout_encoder {
 120         struct drm_encoder encoder;
 121         struct sti_tvout *tvout;
 122 };
 123
 124 #define to_sti_tvout_encoder(x) \
 125         container_of(x, struct sti_tvout_encoder, encoder)
 126
 127 #define to_sti_tvout(x) to_sti_tvout_encoder(x)->tvout
 128
 129 /* preformatter conversion matrix */
 130 static const u32 rgb_to_ycbcr_601[8] = {
 131         0xF927082E, 0x04C9FEAB, 0x01D30964, 0xFA95FD3D,
 132         0x0000082E, 0x00002000, 0x00002000, 0x00000000
 133 };
 134
 135 /* 709 RGB to YCbCr */
 136 static const u32 rgb_to_ycbcr_709[8] = {
 137         0xF891082F, 0x0367FF40, 0x01280B71, 0xF9B1FE20,
 138         0x0000082F, 0x00002000, 0x00002000, 0x00000000
 139 };
 140
 141 static u32 tvout_read(struct sti_tvout *tvout, int offset)
 142 {
 143         return readl(tvout->regs + offset);
 144 }
 145
 146 static void tvout_write(struct sti_tvout *tvout, u32 val, int offset)
 147 {
 148         writel(val, tvout->regs + offset);
 149 }
 150
 151 /**
 152  * Set the clipping mode of a VIP
 153  *
 154  * @tvout: tvout structure
 155  * @reg: register to set
 156  * @cr_r:
 157  * @y_g:
 158  * @cb_b:
 159  */
 160 static void tvout_vip_set_color_order(struct sti_tvout *tvout, int reg,
 161                                       u32 cr_r, u32 y_g, u32 cb_b)
 162 {
 163         u32 val = tvout_read(tvout, reg);
 164
 165         val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_R_SHIFT);
 166         val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_G_SHIFT);
 167         val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_B_SHIFT);
 168         val |= cr_r << TVO_VIP_REORDER_R_SHIFT;
 169         val |= y_g << TVO_VIP_REORDER_G_SHIFT;
 170         val |= cb_b << TVO_VIP_REORDER_B_SHIFT;
 171
 172         tvout_write(tvout, val, reg);
 173 }
 174
 175 /**
 176  * Set the clipping mode of a VIP
 177  *
 178  * @tvout: tvout structure
 179  * @reg: register to set
 180  * @range: clipping range
 181  */
 182 static void tvout_vip_set_clip_mode(struct sti_tvout *tvout, int reg, u32 range)
 183 {
 184         u32 val = tvout_read(tvout, reg);
 185
 186         val &= ~(TVO_VIP_CLIP_MASK << TVO_VIP_CLIP_SHIFT);
 187         val |= range << TVO_VIP_CLIP_SHIFT;
 188         tvout_write(tvout, val, reg);
 189 }
 190
 191 /**
 192  * Set the rounded value of a VIP
 193  *
 194  * @tvout: tvout structure
 195  * @reg: register to set
 196  * @rnd: rounded val per component
 197  */
 198 static void tvout_vip_set_rnd(struct sti_tvout *tvout, int reg, u32 rnd)
 199 {
 200         u32 val = tvout_read(tvout, reg);
 201
 202         val &= ~(TVO_VIP_RND_MASK << TVO_VIP_RND_SHIFT);
 203         val |= rnd << TVO_VIP_RND_SHIFT;
 204         tvout_write(tvout, val, reg);
 205 }
 206
 207 /**
 208  * Select the VIP input
 209  *
 210  * @tvout: tvout structure
 211  * @reg: register to set
 212  * @main_path: main or auxiliary path
 213  * @sel_input: selected_input (main/aux + conv)
 214  */
 215 static void tvout_vip_set_sel_input(struct sti_tvout *tvout,
 216                                     int reg,
 217                                     bool main_path,
 218                                     enum sti_tvout_video_out_type video_out)
 219 {
 220         u32 sel_input;
 221         u32 val = tvout_read(tvout, reg);
 222
 223         if (main_path)
 224                 sel_input = TVO_VIP_SEL_INPUT_MAIN;
 225         else
 226                 sel_input = TVO_VIP_SEL_INPUT_AUX;
 227
 228         switch (video_out) {
 229         case STI_TVOUT_VIDEO_OUT_RGB:
 230                 sel_input |= TVO_VIP_SEL_INPUT_BYPASSED;
 231                 break;
 232         case STI_TVOUT_VIDEO_OUT_YUV:
 233                 sel_input &= ~TVO_VIP_SEL_INPUT_BYPASSED;
 234                 break;
 235         }
 236
 237         /* on stih407 chip the sel_input bypass mode logic is inverted */
 238         sel_input = sel_input ^ TVO_VIP_SEL_INPUT_BYPASS_MASK;
 239
 240         val &= ~TVO_VIP_SEL_INPUT_MASK;
 241         val |= sel_input;
 242         tvout_write(tvout, val, reg);
 243 }
 244
 245 /**
 246  * Select the input video signed or unsigned
 247  *
 248  * @tvout: tvout structure
 249  * @reg: register to set
 250  * @in_vid_signed: used video input format
 251  */
 252 static void tvout_vip_set_in_vid_fmt(struct sti_tvout *tvout,
 253                 int reg, u32 in_vid_fmt)
 254 {
 255         u32 val = tvout_read(tvout, reg);
 256
 257         val &= ~TVO_IN_FMT_SIGNED;
 258         val |= in_vid_fmt;
 259         tvout_write(tvout, val, reg);
 260 }
 261
 262 /**
 263  * Set preformatter matrix
 264  *
 265  * @tvout: tvout structure
 266  * @mode: display mode structure
 267  */
 268 static void tvout_preformatter_set_matrix(struct sti_tvout *tvout,
 269                                           struct drm_display_mode *mode)
 270 {
 271         unsigned int i;
 272         const u32 *pf_matrix;
 273
 274         if (mode->vdisplay >= TVO_MIN_HD_HEIGHT)
 275                 pf_matrix = rgb_to_ycbcr_709;
 276         else
 277                 pf_matrix = rgb_to_ycbcr_601;
 278
 279         for (i = 0; i < 8; i++) {
 280                 tvout_write(tvout, *(pf_matrix + i),
 281                             TVO_CSC_MAIN_M0 + (i * 4));
 282                 tvout_write(tvout, *(pf_matrix + i),
 283                             TVO_CSC_AUX_M0 + (i * 4));
 284         }
 285 }
 286
 287 /**
 288  * Start VIP block for DVO output
 289  *
 290  * @tvout: pointer on tvout structure
 291  * @main_path: true if main path has to be used in the vip configuration
 292  *        else aux path is used.
 293  */
 294 static void tvout_dvo_start(struct sti_tvout *tvout, bool main_path)
 295 {
 296         u32 tvo_in_vid_format;
 297         int val, tmp;
 298
 299         dev_dbg(tvout->dev, "%s\n", __func__);
 300
 301         if (main_path) {
 302                 DRM_DEBUG_DRIVER("main vip for DVO\n");
 303                 /* Select the input sync for dvo */
 304                 tmp = TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_DVO;
 305                 val  = tmp << TVO_SYNC_DVO_PAD_VSYNC_SHIFT;
 306                 val |= tmp << TVO_SYNC_DVO_PAD_HSYNC_SHIFT;
 307                 val |= tmp;
 308                 tvout_write(tvout, val, TVO_DVO_SYNC_SEL);
 309                 tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT;
 310         } else {
 311                 DRM_DEBUG_DRIVER("aux vip for DVO\n");
 312                 /* Select the input sync for dvo */
 313                 tmp = TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_DVO;
 314                 val  = tmp << TVO_SYNC_DVO_PAD_VSYNC_SHIFT;
 315                 val |= tmp << TVO_SYNC_DVO_PAD_HSYNC_SHIFT;
 316                 val |= tmp;
 317                 tvout_write(tvout, val, TVO_DVO_SYNC_SEL);
 318                 tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT;
 319         }
 320
 321         /* Set color channel order */
 322         tvout_vip_set_color_order(tvout, TVO_VIP_DVO,
 323                                   TVO_VIP_REORDER_CR_R_SEL,
 324                                   TVO_VIP_REORDER_Y_G_SEL,
 325                                   TVO_VIP_REORDER_CB_B_SEL);
 326
 327         /* Set clipping mode */
 328         tvout_vip_set_clip_mode(tvout, TVO_VIP_DVO, TVO_VIP_CLIP_DISABLED);
 329
 330         /* Set round mode (rounded to 8-bit per component) */
 331         tvout_vip_set_rnd(tvout, TVO_VIP_DVO, TVO_VIP_RND_8BIT_ROUNDED);
 332
 333         /* Set input video format */
 334         tvout_vip_set_in_vid_fmt(tvout, tvo_in_vid_format, TVO_IN_FMT_SIGNED);
 335
 336         /* Input selection */
 337         tvout_vip_set_sel_input(tvout, TVO_VIP_DVO, main_path,
 338                                 STI_TVOUT_VIDEO_OUT_RGB);
 339 }
 340
 341 /**
 342  * Start VIP block for HDMI output
 343  *
 344  * @tvout: pointer on tvout structure
 345  * @main_path: true if main path has to be used in the vip configuration
 346  *        else aux path is used.
 347  */
 348 static void tvout_hdmi_start(struct sti_tvout *tvout, bool main_path)
 349 {
 350         u32 tvo_in_vid_format;
 351
 352         dev_dbg(tvout->dev, "%s\n", __func__);
 353
 354         if (main_path) {
 355                 DRM_DEBUG_DRIVER("main vip for hdmi\n");
 356                 /* select the input sync for hdmi */
 357                 tvout_write(tvout,
 358                             TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_HDMI,
 359                             TVO_HDMI_SYNC_SEL);
 360                 tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT;
 361         } else {
 362                 DRM_DEBUG_DRIVER("aux vip for hdmi\n");
 363                 /* select the input sync for hdmi */
 364                 tvout_write(tvout,
 365                             TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_HDMI,
 366                             TVO_HDMI_SYNC_SEL);
 367                 tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT;
 368         }
 369
 370         /* set color channel order */
 371         tvout_vip_set_color_order(tvout, TVO_VIP_HDMI,
 372                                   TVO_VIP_REORDER_CR_R_SEL,
 373                                   TVO_VIP_REORDER_Y_G_SEL,
 374                                   TVO_VIP_REORDER_CB_B_SEL);
 375
 376         /* set clipping mode */
 377         tvout_vip_set_clip_mode(tvout, TVO_VIP_HDMI, TVO_VIP_CLIP_DISABLED);
 378
 379         /* set round mode (rounded to 8-bit per component) */
 380         tvout_vip_set_rnd(tvout, TVO_VIP_HDMI, TVO_VIP_RND_8BIT_ROUNDED);
 381
 382         /* set input video format */
 383         tvout_vip_set_in_vid_fmt(tvout, tvo_in_vid_format, TVO_IN_FMT_SIGNED);
 384
 385         /* input selection */
 386         tvout_vip_set_sel_input(tvout, TVO_VIP_HDMI, main_path,
 387                                 STI_TVOUT_VIDEO_OUT_RGB);
 388 }
 389
 390 /**
 391  * Start HDF VIP and HD DAC
 392  *
 393  * @tvout: pointer on tvout structure
 394  * @main_path: true if main path has to be used in the vip configuration
 395  *        else aux path is used.
 396  */
 397 static void tvout_hda_start(struct sti_tvout *tvout, bool main_path)
 398 {
 399         u32 tvo_in_vid_format;
 400         int val;
 401
 402         dev_dbg(tvout->dev, "%s\n", __func__);
 403
 404         if (main_path) {
 405                 DRM_DEBUG_DRIVER("main vip for HDF\n");
 406                 /* Select the input sync for HD analog and HD DCS */
 407                 val  = TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_HDDCS;
 408                 val  = val << TVO_SYNC_HD_DCS_SHIFT;
 409                 val |= TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_HDF;
 410                 tvout_write(tvout, val, TVO_HD_SYNC_SEL);
 411                 tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT;
 412         } else {
 413                 DRM_DEBUG_DRIVER("aux vip for HDF\n");
 414                 /* Select the input sync for HD analog and HD DCS */
 415                 val  = TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_HDDCS;
 416                 val  = val << TVO_SYNC_HD_DCS_SHIFT;
 417                 val |= TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_HDF;
 418                 tvout_write(tvout, val, TVO_HD_SYNC_SEL);
 419                 tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT;
 420         }
 421
 422         /* set color channel order */
 423         tvout_vip_set_color_order(tvout, TVO_VIP_HDF,
 424                                   TVO_VIP_REORDER_CR_R_SEL,
 425                                   TVO_VIP_REORDER_Y_G_SEL,
 426                                   TVO_VIP_REORDER_CB_B_SEL);
 427
 428         /* set clipping mode */
 429         tvout_vip_set_clip_mode(tvout, TVO_VIP_HDF, TVO_VIP_CLIP_DISABLED);
 430
 431         /* set round mode (rounded to 10-bit per component) */
 432         tvout_vip_set_rnd(tvout, TVO_VIP_HDF, TVO_VIP_RND_10BIT_ROUNDED);
 433
 434         /* Set input video format */
 435         tvout_vip_set_in_vid_fmt(tvout, tvo_in_vid_format, TVO_IN_FMT_SIGNED);
 436
 437         /* Input selection */
 438         tvout_vip_set_sel_input(tvout, TVO_VIP_HDF, main_path,
 439                                 STI_TVOUT_VIDEO_OUT_YUV);
 440
 441         /* power up HD DAC */
 442         tvout_write(tvout, 0, TVO_HD_DAC_CFG_OFF);
 443 }
 444
 445 #define DBGFS_DUMP(reg) seq_printf(s, "\n  %-25s 0x%08X", #reg, \
 446                                    readl(tvout->regs + reg))
 447
 448 static void tvout_dbg_vip(struct seq_file *s, int val)
 449 {
 450         int r, g, b, tmp, mask;
 451         char *const reorder[] = {"Y_G", "Cb_B", "Cr_R"};
 452         char *const clipping[] = {"No", "EAV/SAV", "Limited range RGB/Y",
 453                                   "Limited range Cb/Cr", "decided by register"};
 454         char *const round[] = {"8-bit", "10-bit", "12-bit"};
 455         char *const input_sel[] = {"Main (color matrix enabled)",
 456                                    "Main (color matrix by-passed)",
 457                                    "", "", "", "", "", "",
 458                                    "Aux (color matrix enabled)",
 459                                    "Aux (color matrix by-passed)",
 460                                    "", "", "", "", "", "Force value"};
 461
 462         seq_putc(s, '\t');
 463         mask = TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_R_SHIFT;
 464         r = (val & mask) >> TVO_VIP_REORDER_R_SHIFT;
 465         mask = TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_G_SHIFT;
 466         g = (val & mask) >> TVO_VIP_REORDER_G_SHIFT;
 467         mask = TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_B_SHIFT;
 468         b = (val & mask) >> TVO_VIP_REORDER_B_SHIFT;
 469         seq_printf(s, "%-24s %s->%s %s->%s %s->%s\n", "Reorder:",
 470                    reorder[r], reorder[TVO_VIP_REORDER_CR_R_SEL],
 471                    reorder[g], reorder[TVO_VIP_REORDER_Y_G_SEL],
 472                    reorder[b], reorder[TVO_VIP_REORDER_CB_B_SEL]);
 473         seq_puts(s, "\t\t\t\t\t");
 474         mask = TVO_VIP_CLIP_MASK << TVO_VIP_CLIP_SHIFT;
 475         tmp = (val & mask) >> TVO_VIP_CLIP_SHIFT;
 476         seq_printf(s, "%-24s %s\n", "Clipping:", clipping[tmp]);
 477         seq_puts(s, "\t\t\t\t\t");
 478         mask = TVO_VIP_RND_MASK << TVO_VIP_RND_SHIFT;
 479         tmp = (val & mask) >> TVO_VIP_RND_SHIFT;
 480         seq_printf(s, "%-24s input data rounded to %s per component\n",
 481                    "Round:", round[tmp]);
 482         seq_puts(s, "\t\t\t\t\t");
 483         tmp = (val & TVO_VIP_SEL_INPUT_MASK);
 484         seq_printf(s, "%-24s %s", "Input selection:", input_sel[tmp]);
 485 }
 486
 487 static void tvout_dbg_hd_dac_cfg(struct seq_file *s, int val)
 488 {
 489         seq_printf(s, "\t%-24s %s", "HD DAC:",
 490                    val & 1 ? "disabled" : "enabled");
 491 }
 492
 493 static int tvout_dbg_show(struct seq_file *s, void *data)
 494 {
 495         struct drm_info_node *node = s->private;
 496         struct sti_tvout *tvout = (struct sti_tvout *)node->info_ent->data;
 497         struct drm_crtc *crtc;
 498
 499         seq_printf(s, "TVOUT: (vaddr = 0x%p)", tvout->regs);
 500
 501         seq_puts(s, "\n\n  HDMI encoder: ");
 502         crtc = tvout->hdmi->crtc;
 503         if (crtc) {
 504                 seq_printf(s, "connected to %s path",
 505                            sti_crtc_is_main(crtc) ? "main" : "aux");
 506                 DBGFS_DUMP(TVO_HDMI_SYNC_SEL);
 507                 DBGFS_DUMP(TVO_VIP_HDMI);
 508                 tvout_dbg_vip(s, readl(tvout->regs + TVO_VIP_HDMI));
 509         } else {
 510                 seq_puts(s, "disabled");
 511         }
 512
 513         seq_puts(s, "\n\n  DVO encoder: ");
 514         crtc = tvout->dvo->crtc;
 515         if (crtc) {
 516                 seq_printf(s, "connected to %s path",
 517                            sti_crtc_is_main(crtc) ? "main" : "aux");
 518                 DBGFS_DUMP(TVO_DVO_SYNC_SEL);
 519                 DBGFS_DUMP(TVO_DVO_CONFIG);
 520                 DBGFS_DUMP(TVO_VIP_DVO);
 521                 tvout_dbg_vip(s, readl(tvout->regs + TVO_VIP_DVO));
 522         } else {
 523                 seq_puts(s, "disabled");
 524         }
 525
 526         seq_puts(s, "\n\n  HDA encoder: ");
 527         crtc = tvout->hda->crtc;
 528         if (crtc) {
 529                 seq_printf(s, "connected to %s path",
 530                            sti_crtc_is_main(crtc) ? "main" : "aux");
 531                 DBGFS_DUMP(TVO_HD_SYNC_SEL);
 532                 DBGFS_DUMP(TVO_HD_DAC_CFG_OFF);
 533                 tvout_dbg_hd_dac_cfg(s,
 534                                      readl(tvout->regs + TVO_HD_DAC_CFG_OFF));
 535                 DBGFS_DUMP(TVO_VIP_HDF);
 536                 tvout_dbg_vip(s, readl(tvout->regs + TVO_VIP_HDF));
 537         } else {
 538                 seq_puts(s, "disabled");
 539         }
 540
 541         seq_puts(s, "\n\n  main path configuration");
 542         DBGFS_DUMP(TVO_CSC_MAIN_M0);
 543         DBGFS_DUMP(TVO_CSC_MAIN_M1);
 544         DBGFS_DUMP(TVO_CSC_MAIN_M2);
 545         DBGFS_DUMP(TVO_CSC_MAIN_M3);
 546         DBGFS_DUMP(TVO_CSC_MAIN_M4);
 547         DBGFS_DUMP(TVO_CSC_MAIN_M5);
 548         DBGFS_DUMP(TVO_CSC_MAIN_M6);
 549         DBGFS_DUMP(TVO_CSC_MAIN_M7);
 550         DBGFS_DUMP(TVO_MAIN_IN_VID_FORMAT);
 551
 552         seq_puts(s, "\n\n  auxiliary path configuration");
 553         DBGFS_DUMP(TVO_CSC_AUX_M0);
 554         DBGFS_DUMP(TVO_CSC_AUX_M2);
 555         DBGFS_DUMP(TVO_CSC_AUX_M3);
 556         DBGFS_DUMP(TVO_CSC_AUX_M4);
 557         DBGFS_DUMP(TVO_CSC_AUX_M5);
 558         DBGFS_DUMP(TVO_CSC_AUX_M6);
 559         DBGFS_DUMP(TVO_CSC_AUX_M7);
 560         DBGFS_DUMP(TVO_AUX_IN_VID_FORMAT);
 561         seq_putc(s, '\n');
 562         return 0;
 563 }
 564
 565 static struct drm_info_list tvout_debugfs_files[] = {
 566         { "tvout", tvout_dbg_show, 0, NULL },
 567 };
 568
 569 static int tvout_debugfs_init(struct sti_tvout *tvout, struct drm_minor *minor)
 570 {
 571         unsigned int i;
 572
 573         for (i = 0; i < ARRAY_SIZE(tvout_debugfs_files); i++)
 574                 tvout_debugfs_files[i].data = tvout;
 575
 576         return drm_debugfs_create_files(tvout_debugfs_files,
 577                                         ARRAY_SIZE(tvout_debugfs_files),
 578                                         minor->debugfs_root, minor);
 579 }
 580
 581 static void sti_tvout_encoder_dpms(struct drm_encoder *encoder, int mode)
 582 {
 583 }
 584
 585 static void sti_tvout_encoder_mode_set(struct drm_encoder *encoder,
 586                                        struct drm_display_mode *mode,
 587                                        struct drm_display_mode *adjusted_mode)
 588 {
 589 }
 590
 591 static void sti_tvout_encoder_destroy(struct drm_encoder *encoder)
 592 {
 593         struct sti_tvout_encoder *sti_encoder = to_sti_tvout_encoder(encoder);
 594
 595         drm_encoder_cleanup(encoder);
 596         kfree(sti_encoder);
 597 }
 598
 599 static int sti_tvout_late_register(struct drm_encoder *encoder)
 600 {
 601         struct sti_tvout *tvout = to_sti_tvout(encoder);
 602         int ret;
 603
 604         if (tvout->debugfs_registered)
 605                 return 0;
 606
 607         ret = tvout_debugfs_init(tvout, encoder->dev->primary);
 608         if (ret)
 609                 return ret;
 610
 611         tvout->debugfs_registered = true;
 612         return 0;
 613 }
 614
 615 static void sti_tvout_early_unregister(struct drm_encoder *encoder)
 616 {
 617         struct sti_tvout *tvout = to_sti_tvout(encoder);
 618
 619         if (!tvout->debugfs_registered)
 620                 return;
 621
 622         tvout->debugfs_registered = false;
 623 }
 624
 625 static const struct drm_encoder_funcs sti_tvout_encoder_funcs = {
 626         .destroy = sti_tvout_encoder_destroy,
 627         .late_register = sti_tvout_late_register,
 628         .early_unregister = sti_tvout_early_unregister,
 629 };
 630
 631 static void sti_dvo_encoder_enable(struct drm_encoder *encoder)
 632 {
 633         struct sti_tvout *tvout = to_sti_tvout(encoder);
 634
 635         tvout_preformatter_set_matrix(tvout, &encoder->crtc->mode);
 636
 637         tvout_dvo_start(tvout, sti_crtc_is_main(encoder->crtc));
 638 }
 639
 640 static void sti_dvo_encoder_disable(struct drm_encoder *encoder)
 641 {
 642         struct sti_tvout *tvout = to_sti_tvout(encoder);
 643
 644         /* Reset VIP register */
 645         tvout_write(tvout, 0x0, TVO_VIP_DVO);
 646 }
 647
 648 static const struct drm_encoder_helper_funcs sti_dvo_encoder_helper_funcs = {
 649         .dpms = sti_tvout_encoder_dpms,
 650         .mode_set = sti_tvout_encoder_mode_set,
 651         .enable = sti_dvo_encoder_enable,
 652         .disable = sti_dvo_encoder_disable,
 653 };
 654
 655 static struct drm_encoder *
 656 sti_tvout_create_dvo_encoder(struct drm_device *dev,
 657                              struct sti_tvout *tvout)
 658 {
 659         struct sti_tvout_encoder *encoder;
 660         struct drm_encoder *drm_encoder;
 661
 662         encoder = devm_kzalloc(tvout->dev, sizeof(*encoder), GFP_KERNEL);
 663         if (!encoder)
 664                 return NULL;
 665
 666         encoder->tvout = tvout;
 667
 668         drm_encoder = (struct drm_encoder *)encoder;
 669
 670         drm_encoder->possible_crtcs = ENCODER_CRTC_MASK;
 671         drm_encoder->possible_clones = 1 << 0;
 672
 673         drm_encoder_init(dev, drm_encoder,
 674                          &sti_tvout_encoder_funcs, DRM_MODE_ENCODER_LVDS,
 675                          NULL);
 676
 677         drm_encoder_helper_add(drm_encoder, &sti_dvo_encoder_helper_funcs);
 678
 679         return drm_encoder;
 680 }
 681
 682 static void sti_hda_encoder_enable(struct drm_encoder *encoder)
 683 {
 684         struct sti_tvout *tvout = to_sti_tvout(encoder);
 685
 686         tvout_preformatter_set_matrix(tvout, &encoder->crtc->mode);
 687
 688         tvout_hda_start(tvout, sti_crtc_is_main(encoder->crtc));
 689 }
 690
 691 static void sti_hda_encoder_disable(struct drm_encoder *encoder)
 692 {
 693         struct sti_tvout *tvout = to_sti_tvout(encoder);
 694
 695         /* reset VIP register */
 696         tvout_write(tvout, 0x0, TVO_VIP_HDF);
 697
 698         /* power down HD DAC */
 699         tvout_write(tvout, 1, TVO_HD_DAC_CFG_OFF);
 700 }
 701
 702 static const struct drm_encoder_helper_funcs sti_hda_encoder_helper_funcs = {
 703         .dpms = sti_tvout_encoder_dpms,
 704         .mode_set = sti_tvout_encoder_mode_set,
 705         .commit = sti_hda_encoder_enable,
 706         .disable = sti_hda_encoder_disable,
 707 };
 708
 709 static struct drm_encoder *sti_tvout_create_hda_encoder(struct drm_device *dev,
 710                 struct sti_tvout *tvout)
 711 {
 712         struct sti_tvout_encoder *encoder;
 713         struct drm_encoder *drm_encoder;
 714
 715         encoder = devm_kzalloc(tvout->dev, sizeof(*encoder), GFP_KERNEL);
 716         if (!encoder)
 717                 return NULL;
 718
 719         encoder->tvout = tvout;
 720
 721         drm_encoder = (struct drm_encoder *) encoder;
 722
 723         drm_encoder->possible_crtcs = ENCODER_CRTC_MASK;
 724         drm_encoder->possible_clones = 1 << 0;
 725
 726         drm_encoder_init(dev, drm_encoder,
 727                         &sti_tvout_encoder_funcs, DRM_MODE_ENCODER_DAC, NULL);
 728
 729         drm_encoder_helper_add(drm_encoder, &sti_hda_encoder_helper_funcs);
 730
 731         return drm_encoder;
 732 }
 733
 734 static void sti_hdmi_encoder_enable(struct drm_encoder *encoder)
 735 {
 736         struct sti_tvout *tvout = to_sti_tvout(encoder);
 737
 738         tvout_preformatter_set_matrix(tvout, &encoder->crtc->mode);
 739
 740         tvout_hdmi_start(tvout, sti_crtc_is_main(encoder->crtc));
 741 }
 742
 743 static void sti_hdmi_encoder_disable(struct drm_encoder *encoder)
 744 {
 745         struct sti_tvout *tvout = to_sti_tvout(encoder);
 746
 747         /* reset VIP register */
 748         tvout_write(tvout, 0x0, TVO_VIP_HDMI);
 749 }
 750
 751 static const struct drm_encoder_helper_funcs sti_hdmi_encoder_helper_funcs = {
 752         .dpms = sti_tvout_encoder_dpms,
 753         .mode_set = sti_tvout_encoder_mode_set,
 754         .commit = sti_hdmi_encoder_enable,
 755         .disable = sti_hdmi_encoder_disable,
 756 };
 757
 758 static struct drm_encoder *sti_tvout_create_hdmi_encoder(struct drm_device *dev,
 759                 struct sti_tvout *tvout)
 760 {
 761         struct sti_tvout_encoder *encoder;
 762         struct drm_encoder *drm_encoder;
 763
 764         encoder = devm_kzalloc(tvout->dev, sizeof(*encoder), GFP_KERNEL);
 765         if (!encoder)
 766                 return NULL;
 767
 768         encoder->tvout = tvout;
 769
 770         drm_encoder = (struct drm_encoder *) encoder;
 771
 772         drm_encoder->possible_crtcs = ENCODER_CRTC_MASK;
 773         drm_encoder->possible_clones = 1 << 1;
 774
 775         drm_encoder_init(dev, drm_encoder,
 776                         &sti_tvout_encoder_funcs, DRM_MODE_ENCODER_TMDS, NULL);
 777
 778         drm_encoder_helper_add(drm_encoder, &sti_hdmi_encoder_helper_funcs);
 779
 780         return drm_encoder;
 781 }
 782
 783 static void sti_tvout_create_encoders(struct drm_device *dev,
 784                 struct sti_tvout *tvout)
 785 {
 786         tvout->hdmi = sti_tvout_create_hdmi_encoder(dev, tvout);
 787         tvout->hda = sti_tvout_create_hda_encoder(dev, tvout);
 788         tvout->dvo = sti_tvout_create_dvo_encoder(dev, tvout);
 789 }
 790
 791 static void sti_tvout_destroy_encoders(struct sti_tvout *tvout)
 792 {
 793         if (tvout->hdmi)
 794                 drm_encoder_cleanup(tvout->hdmi);
 795         tvout->hdmi = NULL;
 796
 797         if (tvout->hda)
 798                 drm_encoder_cleanup(tvout->hda);
 799         tvout->hda = NULL;
 800
 801         if (tvout->dvo)
 802                 drm_encoder_cleanup(tvout->dvo);
 803         tvout->dvo = NULL;
 804 }
 805
 806 static int sti_tvout_bind(struct device *dev, struct device *master, void *data)
 807 {
 808         struct sti_tvout *tvout = dev_get_drvdata(dev);
 809         struct drm_device *drm_dev = data;
 810
 811         tvout->drm_dev = drm_dev;
 812
 813         sti_tvout_create_encoders(drm_dev, tvout);
 814
 815         return 0;
 816 }
 817
 818 static void sti_tvout_unbind(struct device *dev, struct device *master,
 819         void *data)
 820 {
 821         struct sti_tvout *tvout = dev_get_drvdata(dev);
 822
 823         sti_tvout_destroy_encoders(tvout);
 824 }
 825
 826 static const struct component_ops sti_tvout_ops = {
 827         .bind   = sti_tvout_bind,
 828         .unbind = sti_tvout_unbind,
 829 };
 830
 831 static int sti_tvout_probe(struct platform_device *pdev)
 832 {
 833         struct device *dev = &pdev->dev;
 834         struct device_node *node = dev->of_node;
 835         struct sti_tvout *tvout;
 836         struct resource *res;
 837
 838         DRM_INFO("%s\n", __func__);
 839
 840         if (!node)
 841                 return -ENODEV;
 842
 843         tvout = devm_kzalloc(dev, sizeof(*tvout), GFP_KERNEL);
 844         if (!tvout)
 845                 return -ENOMEM;
 846
 847         tvout->dev = dev;
 848
 849         /* get memory resources */
 850         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tvout-reg");
 851         if (!res) {
 852                 DRM_ERROR("Invalid glue resource\n");
 853                 return -ENOMEM;
 854         }
 855         tvout->regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
 856         if (!tvout->regs)
 857                 return -ENOMEM;
 858
 859         /* get reset resources */
 860         tvout->reset = devm_reset_control_get(dev, "tvout");
 861         /* take tvout out of reset */
 862         if (!IS_ERR(tvout->reset))
 863                 reset_control_deassert(tvout->reset);
 864
 865         platform_set_drvdata(pdev, tvout);
 866
 867         return component_add(dev, &sti_tvout_ops);
 868 }
 869
 870 static int sti_tvout_remove(struct platform_device *pdev)
 871 {
 872         component_del(&pdev->dev, &sti_tvout_ops);
 873         return 0;
 874 }
 875
 876 static const struct of_device_id tvout_of_match[] = {
 877         { .compatible = "st,stih407-tvout", },
 878         { /* end node */ }
 879 };
 880 MODULE_DEVICE_TABLE(of, tvout_of_match);
 881
 882 struct platform_driver sti_tvout_driver = {
 883         .driver = {
 884                 .name = "sti-tvout",
 885                 .owner = THIS_MODULE,
 886                 .of_match_table = tvout_of_match,
 887         },
 888         .probe = sti_tvout_probe,
 889         .remove = sti_tvout_remove,
 890 };
 891
 892 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
 893 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
 894 MODULE_LICENSE("GPL");