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/io.h>
  12 #include <linux/module.h>
  13 #include <linux/of_platform.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/reset.h>
  16 #include <linux/seq_file.h>
  17
  18 #include <drm/drm_atomic_helper.h>
  19 #include <drm/drm_debugfs.h>
  20 #include <drm/drm_device.h>
  21 #include <drm/drm_file.h>
  22 #include <drm/drm_print.h>
  23
  24 #include "sti_crtc.h"
  25 #include "sti_drv.h"
  26 #include "sti_vtg.h"
  27
  28 /* glue registers */
  29 #define TVO_CSC_MAIN_M0                  0x000
  30 #define TVO_CSC_MAIN_M1                  0x004
  31 #define TVO_CSC_MAIN_M2                  0x008
  32 #define TVO_CSC_MAIN_M3                  0x00c
  33 #define TVO_CSC_MAIN_M4                  0x010
  34 #define TVO_CSC_MAIN_M5                  0x014
  35 #define TVO_CSC_MAIN_M6                  0x018
  36 #define TVO_CSC_MAIN_M7                  0x01c
  37 #define TVO_MAIN_IN_VID_FORMAT           0x030
  38 #define TVO_CSC_AUX_M0                   0x100
  39 #define TVO_CSC_AUX_M1                   0x104
  40 #define TVO_CSC_AUX_M2                   0x108
  41 #define TVO_CSC_AUX_M3                   0x10c
  42 #define TVO_CSC_AUX_M4                   0x110
  43 #define TVO_CSC_AUX_M5                   0x114
  44 #define TVO_CSC_AUX_M6                   0x118
  45 #define TVO_CSC_AUX_M7                   0x11c
  46 #define TVO_AUX_IN_VID_FORMAT            0x130
  47 #define TVO_VIP_HDF                      0x400
  48 #define TVO_HD_SYNC_SEL                  0x418
  49 #define TVO_HD_DAC_CFG_OFF               0x420
  50 #define TVO_VIP_HDMI                     0x500
  51 #define TVO_HDMI_FORCE_COLOR_0           0x504
  52 #define TVO_HDMI_FORCE_COLOR_1           0x508
  53 #define TVO_HDMI_CLIP_VALUE_B_CB         0x50c
  54 #define TVO_HDMI_CLIP_VALUE_Y_G          0x510
  55 #define TVO_HDMI_CLIP_VALUE_R_CR         0x514
  56 #define TVO_HDMI_SYNC_SEL                0x518
  57 #define TVO_HDMI_DFV_OBS                 0x540
  58 #define TVO_VIP_DVO                      0x600
  59 #define TVO_DVO_SYNC_SEL                 0x618
  60 #define TVO_DVO_CONFIG                   0x620
  61
  62 #define TVO_IN_FMT_SIGNED                BIT(0)
  63 #define TVO_SYNC_EXT                     BIT(4)
  64
  65 #define TVO_VIP_REORDER_R_SHIFT          24
  66 #define TVO_VIP_REORDER_G_SHIFT          20
  67 #define TVO_VIP_REORDER_B_SHIFT          16
  68 #define TVO_VIP_REORDER_MASK             0x3
  69 #define TVO_VIP_REORDER_Y_G_SEL          0
  70 #define TVO_VIP_REORDER_CB_B_SEL         1
  71 #define TVO_VIP_REORDER_CR_R_SEL         2
  72
  73 #define TVO_VIP_CLIP_SHIFT               8
  74 #define TVO_VIP_CLIP_MASK                0x7
  75 #define TVO_VIP_CLIP_DISABLED            0
  76 #define TVO_VIP_CLIP_EAV_SAV             1
  77 #define TVO_VIP_CLIP_LIMITED_RANGE_RGB_Y 2
  78 #define TVO_VIP_CLIP_LIMITED_RANGE_CB_CR 3
  79 #define TVO_VIP_CLIP_PROG_RANGE          4
  80
  81 #define TVO_VIP_RND_SHIFT                4
  82 #define TVO_VIP_RND_MASK                 0x3
  83 #define TVO_VIP_RND_8BIT_ROUNDED         0
  84 #define TVO_VIP_RND_10BIT_ROUNDED        1
  85 #define TVO_VIP_RND_12BIT_ROUNDED        2
  86
  87 #define TVO_VIP_SEL_INPUT_MASK           0xf
  88 #define TVO_VIP_SEL_INPUT_MAIN           0x0
  89 #define TVO_VIP_SEL_INPUT_AUX            0x8
  90 #define TVO_VIP_SEL_INPUT_FORCE_COLOR    0xf
  91 #define TVO_VIP_SEL_INPUT_BYPASS_MASK    0x1
  92 #define TVO_VIP_SEL_INPUT_BYPASSED       1
  93
  94 #define TVO_SYNC_MAIN_VTG_SET_REF        0x00
  95 #define TVO_SYNC_AUX_VTG_SET_REF         0x10
  96
  97 #define TVO_SYNC_HD_DCS_SHIFT            8
  98
  99 #define TVO_SYNC_DVO_PAD_HSYNC_SHIFT     8
 100 #define TVO_SYNC_DVO_PAD_VSYNC_SHIFT     16
 101
 102 #define ENCODER_CRTC_MASK                (BIT(0) | BIT(1))
 103
 104 #define TVO_MIN_HD_HEIGHT                720
 105
 106 /* enum listing the supported output data format */
 107 enum sti_tvout_video_out_type {
 108         STI_TVOUT_VIDEO_OUT_RGB,
 109         STI_TVOUT_VIDEO_OUT_YUV,
 110 };
 111
 112 struct sti_tvout {
 113         struct device *dev;
 114         struct drm_device *drm_dev;
 115         void __iomem *regs;
 116         struct reset_control *reset;
 117         struct drm_encoder *hdmi;
 118         struct drm_encoder *hda;
 119         struct drm_encoder *dvo;
 120         bool debugfs_registered;
 121 };
 122
 123 struct sti_tvout_encoder {
 124         struct drm_encoder encoder;
 125         struct sti_tvout *tvout;
 126 };
 127
 128 #define to_sti_tvout_encoder(x) \
 129         container_of(x, struct sti_tvout_encoder, encoder)
 130
 131 #define to_sti_tvout(x) to_sti_tvout_encoder(x)->tvout
 132
 133 /* preformatter conversion matrix */
 134 static const u32 rgb_to_ycbcr_601[8] = {
 135         0xF927082E, 0x04C9FEAB, 0x01D30964, 0xFA95FD3D,
 136         0x0000082E, 0x00002000, 0x00002000, 0x00000000
 137 };
 138
 139 /* 709 RGB to YCbCr */
 140 static const u32 rgb_to_ycbcr_709[8] = {
 141         0xF891082F, 0x0367FF40, 0x01280B71, 0xF9B1FE20,
 142         0x0000082F, 0x00002000, 0x00002000, 0x00000000
 143 };
 144
 145 static u32 tvout_read(struct sti_tvout *tvout, int offset)
 146 {
 147         return readl(tvout->regs + offset);
 148 }
 149
 150 static void tvout_write(struct sti_tvout *tvout, u32 val, int offset)
 151 {
 152         writel(val, tvout->regs + offset);
 153 }
 154
 155 /**
 156  * Set the clipping mode of a VIP
 157  *
 158  * @tvout: tvout structure
 159  * @reg: register to set
 160  * @cr_r: red chroma or red order
 161  * @y_g: y or green order
 162  * @cb_b: blue chroma or blue order
 163  */
 164 static void tvout_vip_set_color_order(struct sti_tvout *tvout, int reg,
 165                                       u32 cr_r, u32 y_g, u32 cb_b)
 166 {
 167         u32 val = tvout_read(tvout, reg);
 168
 169         val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_R_SHIFT);
 170         val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_G_SHIFT);
 171         val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_B_SHIFT);
 172         val |= cr_r << TVO_VIP_REORDER_R_SHIFT;
 173         val |= y_g << TVO_VIP_REORDER_G_SHIFT;
 174         val |= cb_b << TVO_VIP_REORDER_B_SHIFT;
 175
 176         tvout_write(tvout, val, reg);
 177 }
 178
 179 /**
 180  * Set the clipping mode of a VIP
 181  *
 182  * @tvout: tvout structure
 183  * @reg: register to set
 184  * @range: clipping range
 185  */
 186 static void tvout_vip_set_clip_mode(struct sti_tvout *tvout, int reg, u32 range)
 187 {
 188         u32 val = tvout_read(tvout, reg);
 189
 190         val &= ~(TVO_VIP_CLIP_MASK << TVO_VIP_CLIP_SHIFT);
 191         val |= range << TVO_VIP_CLIP_SHIFT;
 192         tvout_write(tvout, val, reg);
 193 }
 194
 195 /**
 196  * Set the rounded value of a VIP
 197  *
 198  * @tvout: tvout structure
 199  * @reg: register to set
 200  * @rnd: rounded val per component
 201  */
 202 static void tvout_vip_set_rnd(struct sti_tvout *tvout, int reg, u32 rnd)
 203 {
 204         u32 val = tvout_read(tvout, reg);
 205
 206         val &= ~(TVO_VIP_RND_MASK << TVO_VIP_RND_SHIFT);
 207         val |= rnd << TVO_VIP_RND_SHIFT;
 208         tvout_write(tvout, val, reg);
 209 }
 210
 211 /**
 212  * Select the VIP input
 213  *
 214  * @tvout: tvout structure
 215  * @reg: register to set
 216  * @main_path: main or auxiliary path
 217  * @video_out: selected_input (main/aux + conv)
 218  */
 219 static void tvout_vip_set_sel_input(struct sti_tvout *tvout,
 220                                     int reg,
 221                                     bool main_path,
 222                                     enum sti_tvout_video_out_type video_out)
 223 {
 224         u32 sel_input;
 225         u32 val = tvout_read(tvout, reg);
 226
 227         if (main_path)
 228                 sel_input = TVO_VIP_SEL_INPUT_MAIN;
 229         else
 230                 sel_input = TVO_VIP_SEL_INPUT_AUX;
 231
 232         switch (video_out) {
 233         case STI_TVOUT_VIDEO_OUT_RGB:
 234                 sel_input |= TVO_VIP_SEL_INPUT_BYPASSED;
 235                 break;
 236         case STI_TVOUT_VIDEO_OUT_YUV:
 237                 sel_input &= ~TVO_VIP_SEL_INPUT_BYPASSED;
 238                 break;
 239         }
 240
 241         /* on stih407 chip the sel_input bypass mode logic is inverted */
 242         sel_input = sel_input ^ TVO_VIP_SEL_INPUT_BYPASS_MASK;
 243
 244         val &= ~TVO_VIP_SEL_INPUT_MASK;
 245         val |= sel_input;
 246         tvout_write(tvout, val, reg);
 247 }
 248
 249 /**
 250  * Select the input video signed or unsigned
 251  *
 252  * @tvout: tvout structure
 253  * @reg: register to set
 254  * @in_vid_fmt: used video input format
 255  */
 256 static void tvout_vip_set_in_vid_fmt(struct sti_tvout *tvout,
 257                 int reg, u32 in_vid_fmt)
 258 {
 259         u32 val = tvout_read(tvout, reg);
 260
 261         val &= ~TVO_IN_FMT_SIGNED;
 262         val |= in_vid_fmt;
 263         tvout_write(tvout, val, reg);
 264 }
 265
 266 /**
 267  * Set preformatter matrix
 268  *
 269  * @tvout: tvout structure
 270  * @mode: display mode structure
 271  */
 272 static void tvout_preformatter_set_matrix(struct sti_tvout *tvout,
 273                                           struct drm_display_mode *mode)
 274 {
 275         unsigned int i;
 276         const u32 *pf_matrix;
 277
 278         if (mode->vdisplay >= TVO_MIN_HD_HEIGHT)
 279                 pf_matrix = rgb_to_ycbcr_709;
 280         else
 281                 pf_matrix = rgb_to_ycbcr_601;
 282
 283         for (i = 0; i < 8; i++) {
 284                 tvout_write(tvout, *(pf_matrix + i),
 285                             TVO_CSC_MAIN_M0 + (i * 4));
 286                 tvout_write(tvout, *(pf_matrix + i),
 287                             TVO_CSC_AUX_M0 + (i * 4));
 288         }
 289 }
 290
 291 /**
 292  * Start VIP block for DVO output
 293  *
 294  * @tvout: pointer on tvout structure
 295  * @main_path: true if main path has to be used in the vip configuration
 296  *        else aux path is used.
 297  */
 298 static void tvout_dvo_start(struct sti_tvout *tvout, bool main_path)
 299 {
 300         u32 tvo_in_vid_format;
 301         int val, tmp;
 302
 303         dev_dbg(tvout->dev, "%s\n", __func__);
 304
 305         if (main_path) {
 306                 DRM_DEBUG_DRIVER("main vip for DVO\n");
 307                 /* Select the input sync for dvo */
 308                 tmp = TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_DVO;
 309                 val  = tmp << TVO_SYNC_DVO_PAD_VSYNC_SHIFT;
 310                 val |= tmp << TVO_SYNC_DVO_PAD_HSYNC_SHIFT;
 311                 val |= tmp;
 312                 tvout_write(tvout, val, TVO_DVO_SYNC_SEL);
 313                 tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT;
 314         } else {
 315                 DRM_DEBUG_DRIVER("aux vip for DVO\n");
 316                 /* Select the input sync for dvo */
 317                 tmp = TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_DVO;
 318                 val  = tmp << TVO_SYNC_DVO_PAD_VSYNC_SHIFT;
 319                 val |= tmp << TVO_SYNC_DVO_PAD_HSYNC_SHIFT;
 320                 val |= tmp;
 321                 tvout_write(tvout, val, TVO_DVO_SYNC_SEL);
 322                 tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT;
 323         }
 324
 325         /* Set color channel order */
 326         tvout_vip_set_color_order(tvout, TVO_VIP_DVO,
 327                                   TVO_VIP_REORDER_CR_R_SEL,
 328                                   TVO_VIP_REORDER_Y_G_SEL,
 329                                   TVO_VIP_REORDER_CB_B_SEL);
 330
 331         /* Set clipping mode */
 332         tvout_vip_set_clip_mode(tvout, TVO_VIP_DVO, TVO_VIP_CLIP_DISABLED);
 333
 334         /* Set round mode (rounded to 8-bit per component) */
 335         tvout_vip_set_rnd(tvout, TVO_VIP_DVO, TVO_VIP_RND_8BIT_ROUNDED);
 336
 337         /* Set input video format */
 338         tvout_vip_set_in_vid_fmt(tvout, tvo_in_vid_format, TVO_IN_FMT_SIGNED);
 339
 340         /* Input selection */
 341         tvout_vip_set_sel_input(tvout, TVO_VIP_DVO, main_path,
 342                                 STI_TVOUT_VIDEO_OUT_RGB);
 343 }
 344
 345 /**
 346  * Start VIP block for HDMI output
 347  *
 348  * @tvout: pointer on tvout structure
 349  * @main_path: true if main path has to be used in the vip configuration
 350  *        else aux path is used.
 351  */
 352 static void tvout_hdmi_start(struct sti_tvout *tvout, bool main_path)
 353 {
 354         u32 tvo_in_vid_format;
 355
 356         dev_dbg(tvout->dev, "%s\n", __func__);
 357
 358         if (main_path) {
 359                 DRM_DEBUG_DRIVER("main vip for hdmi\n");
 360                 /* select the input sync for hdmi */
 361                 tvout_write(tvout,
 362                             TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_HDMI,
 363                             TVO_HDMI_SYNC_SEL);
 364                 tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT;
 365         } else {
 366                 DRM_DEBUG_DRIVER("aux vip for hdmi\n");
 367                 /* select the input sync for hdmi */
 368                 tvout_write(tvout,
 369                             TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_HDMI,
 370                             TVO_HDMI_SYNC_SEL);
 371                 tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT;
 372         }
 373
 374         /* set color channel order */
 375         tvout_vip_set_color_order(tvout, TVO_VIP_HDMI,
 376                                   TVO_VIP_REORDER_CR_R_SEL,
 377                                   TVO_VIP_REORDER_Y_G_SEL,
 378                                   TVO_VIP_REORDER_CB_B_SEL);
 379
 380         /* set clipping mode */
 381         tvout_vip_set_clip_mode(tvout, TVO_VIP_HDMI, TVO_VIP_CLIP_DISABLED);
 382
 383         /* set round mode (rounded to 8-bit per component) */
 384         tvout_vip_set_rnd(tvout, TVO_VIP_HDMI, TVO_VIP_RND_8BIT_ROUNDED);
 385
 386         /* set input video format */
 387         tvout_vip_set_in_vid_fmt(tvout, tvo_in_vid_format, TVO_IN_FMT_SIGNED);
 388
 389         /* input selection */
 390         tvout_vip_set_sel_input(tvout, TVO_VIP_HDMI, main_path,
 391                                 STI_TVOUT_VIDEO_OUT_RGB);
 392 }
 393
 394 /**
 395  * Start HDF VIP and HD DAC
 396  *
 397  * @tvout: pointer on tvout structure
 398  * @main_path: true if main path has to be used in the vip configuration
 399  *        else aux path is used.
 400  */
 401 static void tvout_hda_start(struct sti_tvout *tvout, bool main_path)
 402 {
 403         u32 tvo_in_vid_format;
 404         int val;
 405
 406         dev_dbg(tvout->dev, "%s\n", __func__);
 407
 408         if (main_path) {
 409                 DRM_DEBUG_DRIVER("main vip for HDF\n");
 410                 /* Select the input sync for HD analog and HD DCS */
 411                 val  = TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_HDDCS;
 412                 val  = val << TVO_SYNC_HD_DCS_SHIFT;
 413                 val |= TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_HDF;
 414                 tvout_write(tvout, val, TVO_HD_SYNC_SEL);
 415                 tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT;
 416         } else {
 417                 DRM_DEBUG_DRIVER("aux vip for HDF\n");
 418                 /* Select the input sync for HD analog and HD DCS */
 419                 val  = TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_HDDCS;
 420                 val  = val << TVO_SYNC_HD_DCS_SHIFT;
 421                 val |= TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_HDF;
 422                 tvout_write(tvout, val, TVO_HD_SYNC_SEL);
 423                 tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT;
 424         }
 425
 426         /* set color channel order */
 427         tvout_vip_set_color_order(tvout, TVO_VIP_HDF,
 428                                   TVO_VIP_REORDER_CR_R_SEL,
 429                                   TVO_VIP_REORDER_Y_G_SEL,
 430                                   TVO_VIP_REORDER_CB_B_SEL);
 431
 432         /* set clipping mode */
 433         tvout_vip_set_clip_mode(tvout, TVO_VIP_HDF, TVO_VIP_CLIP_DISABLED);
 434
 435         /* set round mode (rounded to 10-bit per component) */
 436         tvout_vip_set_rnd(tvout, TVO_VIP_HDF, TVO_VIP_RND_10BIT_ROUNDED);
 437
 438         /* Set input video format */
 439         tvout_vip_set_in_vid_fmt(tvout, tvo_in_vid_format, TVO_IN_FMT_SIGNED);
 440
 441         /* Input selection */
 442         tvout_vip_set_sel_input(tvout, TVO_VIP_HDF, main_path,
 443                                 STI_TVOUT_VIDEO_OUT_YUV);
 444
 445         /* power up HD DAC */
 446         tvout_write(tvout, 0, TVO_HD_DAC_CFG_OFF);
 447 }
 448
 449 #define DBGFS_DUMP(reg) seq_printf(s, "\n  %-25s 0x%08X", #reg, \
 450                                    readl(tvout->regs + reg))
 451
 452 static void tvout_dbg_vip(struct seq_file *s, int val)
 453 {
 454         int r, g, b, tmp, mask;
 455         char *const reorder[] = {"Y_G", "Cb_B", "Cr_R"};
 456         char *const clipping[] = {"No", "EAV/SAV", "Limited range RGB/Y",
 457                                   "Limited range Cb/Cr", "decided by register"};
 458         char *const round[] = {"8-bit", "10-bit", "12-bit"};
 459         char *const input_sel[] = {"Main (color matrix enabled)",
 460                                    "Main (color matrix by-passed)",
 461                                    "", "", "", "", "", "",
 462                                    "Aux (color matrix enabled)",
 463                                    "Aux (color matrix by-passed)",
 464                                    "", "", "", "", "", "Force value"};
 465
 466         seq_putc(s, '\t');
 467         mask = TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_R_SHIFT;
 468         r = (val & mask) >> TVO_VIP_REORDER_R_SHIFT;
 469         mask = TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_G_SHIFT;
 470         g = (val & mask) >> TVO_VIP_REORDER_G_SHIFT;
 471         mask = TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_B_SHIFT;
 472         b = (val & mask) >> TVO_VIP_REORDER_B_SHIFT;
 473         seq_printf(s, "%-24s %s->%s %s->%s %s->%s\n", "Reorder:",
 474                    reorder[r], reorder[TVO_VIP_REORDER_CR_R_SEL],
 475                    reorder[g], reorder[TVO_VIP_REORDER_Y_G_SEL],
 476                    reorder[b], reorder[TVO_VIP_REORDER_CB_B_SEL]);
 477         seq_puts(s, "\t\t\t\t\t");
 478         mask = TVO_VIP_CLIP_MASK << TVO_VIP_CLIP_SHIFT;
 479         tmp = (val & mask) >> TVO_VIP_CLIP_SHIFT;
 480         seq_printf(s, "%-24s %s\n", "Clipping:", clipping[tmp]);
 481         seq_puts(s, "\t\t\t\t\t");
 482         mask = TVO_VIP_RND_MASK << TVO_VIP_RND_SHIFT;
 483         tmp = (val & mask) >> TVO_VIP_RND_SHIFT;
 484         seq_printf(s, "%-24s input data rounded to %s per component\n",
 485                    "Round:", round[tmp]);
 486         seq_puts(s, "\t\t\t\t\t");
 487         tmp = (val & TVO_VIP_SEL_INPUT_MASK);
 488         seq_printf(s, "%-24s %s", "Input selection:", input_sel[tmp]);
 489 }
 490
 491 static void tvout_dbg_hd_dac_cfg(struct seq_file *s, int val)
 492 {
 493         seq_printf(s, "\t%-24s %s", "HD DAC:",
 494                    val & 1 ? "disabled" : "enabled");
 495 }
 496
 497 static int tvout_dbg_show(struct seq_file *s, void *data)
 498 {
 499         struct drm_info_node *node = s->private;
 500         struct sti_tvout *tvout = (struct sti_tvout *)node->info_ent->data;
 501         struct drm_crtc *crtc;
 502
 503         seq_printf(s, "TVOUT: (vaddr = 0x%p)", tvout->regs);
 504
 505         seq_puts(s, "\n\n  HDMI encoder: ");
 506         crtc = tvout->hdmi->crtc;
 507         if (crtc) {
 508                 seq_printf(s, "connected to %s path",
 509                            sti_crtc_is_main(crtc) ? "main" : "aux");
 510                 DBGFS_DUMP(TVO_HDMI_SYNC_SEL);
 511                 DBGFS_DUMP(TVO_VIP_HDMI);
 512                 tvout_dbg_vip(s, readl(tvout->regs + TVO_VIP_HDMI));
 513         } else {
 514                 seq_puts(s, "disabled");
 515         }
 516
 517         seq_puts(s, "\n\n  DVO encoder: ");
 518         crtc = tvout->dvo->crtc;
 519         if (crtc) {
 520                 seq_printf(s, "connected to %s path",
 521                            sti_crtc_is_main(crtc) ? "main" : "aux");
 522                 DBGFS_DUMP(TVO_DVO_SYNC_SEL);
 523                 DBGFS_DUMP(TVO_DVO_CONFIG);
 524                 DBGFS_DUMP(TVO_VIP_DVO);
 525                 tvout_dbg_vip(s, readl(tvout->regs + TVO_VIP_DVO));
 526         } else {
 527                 seq_puts(s, "disabled");
 528         }
 529
 530         seq_puts(s, "\n\n  HDA encoder: ");
 531         crtc = tvout->hda->crtc;
 532         if (crtc) {
 533                 seq_printf(s, "connected to %s path",
 534                            sti_crtc_is_main(crtc) ? "main" : "aux");
 535                 DBGFS_DUMP(TVO_HD_SYNC_SEL);
 536                 DBGFS_DUMP(TVO_HD_DAC_CFG_OFF);
 537                 tvout_dbg_hd_dac_cfg(s,
 538                                      readl(tvout->regs + TVO_HD_DAC_CFG_OFF));
 539                 DBGFS_DUMP(TVO_VIP_HDF);
 540                 tvout_dbg_vip(s, readl(tvout->regs + TVO_VIP_HDF));
 541         } else {
 542                 seq_puts(s, "disabled");
 543         }
 544
 545         seq_puts(s, "\n\n  main path configuration");
 546         DBGFS_DUMP(TVO_CSC_MAIN_M0);
 547         DBGFS_DUMP(TVO_CSC_MAIN_M1);
 548         DBGFS_DUMP(TVO_CSC_MAIN_M2);
 549         DBGFS_DUMP(TVO_CSC_MAIN_M3);
 550         DBGFS_DUMP(TVO_CSC_MAIN_M4);
 551         DBGFS_DUMP(TVO_CSC_MAIN_M5);
 552         DBGFS_DUMP(TVO_CSC_MAIN_M6);
 553         DBGFS_DUMP(TVO_CSC_MAIN_M7);
 554         DBGFS_DUMP(TVO_MAIN_IN_VID_FORMAT);
 555
 556         seq_puts(s, "\n\n  auxiliary path configuration");
 557         DBGFS_DUMP(TVO_CSC_AUX_M0);
 558         DBGFS_DUMP(TVO_CSC_AUX_M2);
 559         DBGFS_DUMP(TVO_CSC_AUX_M3);
 560         DBGFS_DUMP(TVO_CSC_AUX_M4);
 561         DBGFS_DUMP(TVO_CSC_AUX_M5);
 562         DBGFS_DUMP(TVO_CSC_AUX_M6);
 563         DBGFS_DUMP(TVO_CSC_AUX_M7);
 564         DBGFS_DUMP(TVO_AUX_IN_VID_FORMAT);
 565         seq_putc(s, '\n');
 566         return 0;
 567 }
 568
 569 static struct drm_info_list tvout_debugfs_files[] = {
 570         { "tvout", tvout_dbg_show, 0, NULL },
 571 };
 572
 573 static void tvout_debugfs_init(struct sti_tvout *tvout, struct drm_minor *minor)
 574 {
 575         unsigned int i;
 576
 577         for (i = 0; i < ARRAY_SIZE(tvout_debugfs_files); i++)
 578                 tvout_debugfs_files[i].data = tvout;
 579
 580         drm_debugfs_create_files(tvout_debugfs_files,
 581                                  ARRAY_SIZE(tvout_debugfs_files),
 582                                  minor->debugfs_root, minor);
 583 }
 584
 585 static void sti_tvout_encoder_dpms(struct drm_encoder *encoder, int mode)
 586 {
 587 }
 588
 589 static void sti_tvout_encoder_mode_set(struct drm_encoder *encoder,
 590                                        struct drm_display_mode *mode,
 591                                        struct drm_display_mode *adjusted_mode)
 592 {
 593 }
 594
 595 static void sti_tvout_encoder_destroy(struct drm_encoder *encoder)
 596 {
 597         struct sti_tvout_encoder *sti_encoder = to_sti_tvout_encoder(encoder);
 598
 599         drm_encoder_cleanup(encoder);
 600         kfree(sti_encoder);
 601 }
 602
 603 static int sti_tvout_late_register(struct drm_encoder *encoder)
 604 {
 605         struct sti_tvout *tvout = to_sti_tvout(encoder);
 606
 607         if (tvout->debugfs_registered)
 608                 return 0;
 609
 610         tvout_debugfs_init(tvout, encoder->dev->primary);
 611
 612         tvout->debugfs_registered = true;
 613         return 0;
 614 }
 615
 616 static void sti_tvout_early_unregister(struct drm_encoder *encoder)
 617 {
 618         struct sti_tvout *tvout = to_sti_tvout(encoder);
 619
 620         if (!tvout->debugfs_registered)
 621                 return;
 622
 623         tvout->debugfs_registered = false;
 624 }
 625
 626 static const struct drm_encoder_funcs sti_tvout_encoder_funcs = {
 627         .destroy = sti_tvout_encoder_destroy,
 628         .late_register = sti_tvout_late_register,
 629         .early_unregister = sti_tvout_early_unregister,
 630 };
 631
 632 static void sti_dvo_encoder_enable(struct drm_encoder *encoder)
 633 {
 634         struct sti_tvout *tvout = to_sti_tvout(encoder);
 635
 636         tvout_preformatter_set_matrix(tvout, &encoder->crtc->mode);
 637
 638         tvout_dvo_start(tvout, sti_crtc_is_main(encoder->crtc));
 639 }
 640
 641 static void sti_dvo_encoder_disable(struct drm_encoder *encoder)
 642 {
 643         struct sti_tvout *tvout = to_sti_tvout(encoder);
 644
 645         /* Reset VIP register */
 646         tvout_write(tvout, 0x0, TVO_VIP_DVO);
 647 }
 648
 649 static const struct drm_encoder_helper_funcs sti_dvo_encoder_helper_funcs = {
 650         .dpms = sti_tvout_encoder_dpms,
 651         .mode_set = sti_tvout_encoder_mode_set,
 652         .enable = sti_dvo_encoder_enable,
 653         .disable = sti_dvo_encoder_disable,
 654 };
 655
 656 static struct drm_encoder *
 657 sti_tvout_create_dvo_encoder(struct drm_device *dev,
 658                              struct sti_tvout *tvout)
 659 {
 660         struct sti_tvout_encoder *encoder;
 661         struct drm_encoder *drm_encoder;
 662
 663         encoder = devm_kzalloc(tvout->dev, sizeof(*encoder), GFP_KERNEL);
 664         if (!encoder)
 665                 return NULL;
 666
 667         encoder->tvout = tvout;
 668
 669         drm_encoder = &encoder->encoder;
 670
 671         drm_encoder->possible_crtcs = ENCODER_CRTC_MASK;
 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 = &encoder->encoder;
 722
 723         drm_encoder->possible_crtcs = ENCODER_CRTC_MASK;
 724
 725         drm_encoder_init(dev, drm_encoder,
 726                         &sti_tvout_encoder_funcs, DRM_MODE_ENCODER_DAC, NULL);
 727
 728         drm_encoder_helper_add(drm_encoder, &sti_hda_encoder_helper_funcs);
 729
 730         return drm_encoder;
 731 }
 732
 733 static void sti_hdmi_encoder_enable(struct drm_encoder *encoder)
 734 {
 735         struct sti_tvout *tvout = to_sti_tvout(encoder);
 736
 737         tvout_preformatter_set_matrix(tvout, &encoder->crtc->mode);
 738
 739         tvout_hdmi_start(tvout, sti_crtc_is_main(encoder->crtc));
 740 }
 741
 742 static void sti_hdmi_encoder_disable(struct drm_encoder *encoder)
 743 {
 744         struct sti_tvout *tvout = to_sti_tvout(encoder);
 745
 746         /* reset VIP register */
 747         tvout_write(tvout, 0x0, TVO_VIP_HDMI);
 748 }
 749
 750 static const struct drm_encoder_helper_funcs sti_hdmi_encoder_helper_funcs = {
 751         .dpms = sti_tvout_encoder_dpms,
 752         .mode_set = sti_tvout_encoder_mode_set,
 753         .commit = sti_hdmi_encoder_enable,
 754         .disable = sti_hdmi_encoder_disable,
 755 };
 756
 757 static struct drm_encoder *sti_tvout_create_hdmi_encoder(struct drm_device *dev,
 758                 struct sti_tvout *tvout)
 759 {
 760         struct sti_tvout_encoder *encoder;
 761         struct drm_encoder *drm_encoder;
 762
 763         encoder = devm_kzalloc(tvout->dev, sizeof(*encoder), GFP_KERNEL);
 764         if (!encoder)
 765                 return NULL;
 766
 767         encoder->tvout = tvout;
 768
 769         drm_encoder = &encoder->encoder;
 770
 771         drm_encoder->possible_crtcs = ENCODER_CRTC_MASK;
 772
 773         drm_encoder_init(dev, drm_encoder,
 774                         &sti_tvout_encoder_funcs, DRM_MODE_ENCODER_TMDS, NULL);
 775
 776         drm_encoder_helper_add(drm_encoder, &sti_hdmi_encoder_helper_funcs);
 777
 778         return drm_encoder;
 779 }
 780
 781 static void sti_tvout_create_encoders(struct drm_device *dev,
 782                 struct sti_tvout *tvout)
 783 {
 784         tvout->hdmi = sti_tvout_create_hdmi_encoder(dev, tvout);
 785         tvout->hda = sti_tvout_create_hda_encoder(dev, tvout);
 786         tvout->dvo = sti_tvout_create_dvo_encoder(dev, tvout);
 787
 788         tvout->hdmi->possible_clones = drm_encoder_mask(tvout->hdmi) |
 789                 drm_encoder_mask(tvout->hda) | drm_encoder_mask(tvout->dvo);
 790         tvout->hda->possible_clones = drm_encoder_mask(tvout->hdmi) |
 791                 drm_encoder_mask(tvout->hda) | drm_encoder_mask(tvout->dvo);
 792         tvout->dvo->possible_clones = drm_encoder_mask(tvout->hdmi) |
 793                 drm_encoder_mask(tvout->hda) | drm_encoder_mask(tvout->dvo);
 794 }
 795
 796 static void sti_tvout_destroy_encoders(struct sti_tvout *tvout)
 797 {
 798         if (tvout->hdmi)
 799                 drm_encoder_cleanup(tvout->hdmi);
 800         tvout->hdmi = NULL;
 801
 802         if (tvout->hda)
 803                 drm_encoder_cleanup(tvout->hda);
 804         tvout->hda = NULL;
 805
 806         if (tvout->dvo)
 807                 drm_encoder_cleanup(tvout->dvo);
 808         tvout->dvo = NULL;
 809 }
 810
 811 static int sti_tvout_bind(struct device *dev, struct device *master, void *data)
 812 {
 813         struct sti_tvout *tvout = dev_get_drvdata(dev);
 814         struct drm_device *drm_dev = data;
 815
 816         tvout->drm_dev = drm_dev;
 817
 818         sti_tvout_create_encoders(drm_dev, tvout);
 819
 820         return 0;
 821 }
 822
 823 static void sti_tvout_unbind(struct device *dev, struct device *master,
 824         void *data)
 825 {
 826         struct sti_tvout *tvout = dev_get_drvdata(dev);
 827
 828         sti_tvout_destroy_encoders(tvout);
 829 }
 830
 831 static const struct component_ops sti_tvout_ops = {
 832         .bind   = sti_tvout_bind,
 833         .unbind = sti_tvout_unbind,
 834 };
 835
 836 static int sti_tvout_probe(struct platform_device *pdev)
 837 {
 838         struct device *dev = &pdev->dev;
 839         struct device_node *node = dev->of_node;
 840         struct sti_tvout *tvout;
 841         struct resource *res;
 842
 843         DRM_INFO("%s\n", __func__);
 844
 845         if (!node)
 846                 return -ENODEV;
 847
 848         tvout = devm_kzalloc(dev, sizeof(*tvout), GFP_KERNEL);
 849         if (!tvout)
 850                 return -ENOMEM;
 851
 852         tvout->dev = dev;
 853
 854         /* get memory resources */
 855         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tvout-reg");
 856         if (!res) {
 857                 DRM_ERROR("Invalid glue resource\n");
 858                 return -ENOMEM;
 859         }
 860         tvout->regs = devm_ioremap(dev, res->start, resource_size(res));
 861         if (!tvout->regs)
 862                 return -ENOMEM;
 863
 864         /* get reset resources */
 865         tvout->reset = devm_reset_control_get(dev, "tvout");
 866         /* take tvout out of reset */
 867         if (!IS_ERR(tvout->reset))
 868                 reset_control_deassert(tvout->reset);
 869
 870         platform_set_drvdata(pdev, tvout);
 871
 872         return component_add(dev, &sti_tvout_ops);
 873 }
 874
 875 static int sti_tvout_remove(struct platform_device *pdev)
 876 {
 877         component_del(&pdev->dev, &sti_tvout_ops);
 878         return 0;
 879 }
 880
 881 static const struct of_device_id tvout_of_match[] = {
 882         { .compatible = "st,stih407-tvout", },
 883         { /* end node */ }
 884 };
 885 MODULE_DEVICE_TABLE(of, tvout_of_match);
 886
 887 struct platform_driver sti_tvout_driver = {
 888         .driver = {
 889                 .name = "sti-tvout",
 890                 .owner = THIS_MODULE,
 891                 .of_match_table = tvout_of_match,
 892         },
 893         .probe = sti_tvout_probe,
 894         .remove = sti_tvout_remove,
 895 };
 896
 897 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
 898 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
 899 MODULE_LICENSE("GPL");