drivers/gpu/drm/sti/sti_hdmi.c

   1 /*
   2  * Copyright (C) STMicroelectronics SA 2014
   3  * Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics.
   4  * License terms:  GNU General Public License (GPL), version 2
   5  */
   6
   7 #include <linux/clk.h>
   8 #include <linux/component.h>
   9 #include <linux/debugfs.h>
  10 #include <linux/hdmi.h>
  11 #include <linux/module.h>
  12 #include <linux/of_gpio.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/reset.h>
  15
  16 #include <drm/drmP.h>
  17 #include <drm/drm_atomic_helper.h>
  18 #include <drm/drm_crtc_helper.h>
  19 #include <drm/drm_edid.h>
  20
  21 #include <sound/hdmi-codec.h>
  22
  23 #include "sti_hdmi.h"
  24 #include "sti_hdmi_tx3g4c28phy.h"
  25 #include "sti_vtg.h"
  26
  27 #define HDMI_CFG                        0x0000
  28 #define HDMI_INT_EN                     0x0004
  29 #define HDMI_INT_STA                    0x0008
  30 #define HDMI_INT_CLR                    0x000C
  31 #define HDMI_STA                        0x0010
  32 #define HDMI_ACTIVE_VID_XMIN            0x0100
  33 #define HDMI_ACTIVE_VID_XMAX            0x0104
  34 #define HDMI_ACTIVE_VID_YMIN            0x0108
  35 #define HDMI_ACTIVE_VID_YMAX            0x010C
  36 #define HDMI_DFLT_CHL0_DAT              0x0110
  37 #define HDMI_DFLT_CHL1_DAT              0x0114
  38 #define HDMI_DFLT_CHL2_DAT              0x0118
  39 #define HDMI_AUDIO_CFG                  0x0200
  40 #define HDMI_SPDIF_FIFO_STATUS          0x0204
  41 #define HDMI_SW_DI_1_HEAD_WORD          0x0210
  42 #define HDMI_SW_DI_1_PKT_WORD0          0x0214
  43 #define HDMI_SW_DI_1_PKT_WORD1          0x0218
  44 #define HDMI_SW_DI_1_PKT_WORD2          0x021C
  45 #define HDMI_SW_DI_1_PKT_WORD3          0x0220
  46 #define HDMI_SW_DI_1_PKT_WORD4          0x0224
  47 #define HDMI_SW_DI_1_PKT_WORD5          0x0228
  48 #define HDMI_SW_DI_1_PKT_WORD6          0x022C
  49 #define HDMI_SW_DI_CFG                  0x0230
  50 #define HDMI_SAMPLE_FLAT_MASK           0x0244
  51 #define HDMI_AUDN                       0x0400
  52 #define HDMI_AUD_CTS                    0x0404
  53 #define HDMI_SW_DI_2_HEAD_WORD          0x0600
  54 #define HDMI_SW_DI_2_PKT_WORD0          0x0604
  55 #define HDMI_SW_DI_2_PKT_WORD1          0x0608
  56 #define HDMI_SW_DI_2_PKT_WORD2          0x060C
  57 #define HDMI_SW_DI_2_PKT_WORD3          0x0610
  58 #define HDMI_SW_DI_2_PKT_WORD4          0x0614
  59 #define HDMI_SW_DI_2_PKT_WORD5          0x0618
  60 #define HDMI_SW_DI_2_PKT_WORD6          0x061C
  61 #define HDMI_SW_DI_3_HEAD_WORD          0x0620
  62 #define HDMI_SW_DI_3_PKT_WORD0          0x0624
  63 #define HDMI_SW_DI_3_PKT_WORD1          0x0628
  64 #define HDMI_SW_DI_3_PKT_WORD2          0x062C
  65 #define HDMI_SW_DI_3_PKT_WORD3          0x0630
  66 #define HDMI_SW_DI_3_PKT_WORD4          0x0634
  67 #define HDMI_SW_DI_3_PKT_WORD5          0x0638
  68 #define HDMI_SW_DI_3_PKT_WORD6          0x063C
  69
  70 #define HDMI_IFRAME_SLOT_AVI            1
  71 #define HDMI_IFRAME_SLOT_AUDIO          2
  72 #define HDMI_IFRAME_SLOT_VENDOR         3
  73
  74 #define  XCAT(prefix, x, suffix)        prefix ## x ## suffix
  75 #define  HDMI_SW_DI_N_HEAD_WORD(x)      XCAT(HDMI_SW_DI_, x, _HEAD_WORD)
  76 #define  HDMI_SW_DI_N_PKT_WORD0(x)      XCAT(HDMI_SW_DI_, x, _PKT_WORD0)
  77 #define  HDMI_SW_DI_N_PKT_WORD1(x)      XCAT(HDMI_SW_DI_, x, _PKT_WORD1)
  78 #define  HDMI_SW_DI_N_PKT_WORD2(x)      XCAT(HDMI_SW_DI_, x, _PKT_WORD2)
  79 #define  HDMI_SW_DI_N_PKT_WORD3(x)      XCAT(HDMI_SW_DI_, x, _PKT_WORD3)
  80 #define  HDMI_SW_DI_N_PKT_WORD4(x)      XCAT(HDMI_SW_DI_, x, _PKT_WORD4)
  81 #define  HDMI_SW_DI_N_PKT_WORD5(x)      XCAT(HDMI_SW_DI_, x, _PKT_WORD5)
  82 #define  HDMI_SW_DI_N_PKT_WORD6(x)      XCAT(HDMI_SW_DI_, x, _PKT_WORD6)
  83
  84 #define HDMI_SW_DI_MAX_WORD             7
  85
  86 #define HDMI_IFRAME_DISABLED            0x0
  87 #define HDMI_IFRAME_SINGLE_SHOT         0x1
  88 #define HDMI_IFRAME_FIELD               0x2
  89 #define HDMI_IFRAME_FRAME               0x3
  90 #define HDMI_IFRAME_MASK                0x3
  91 #define HDMI_IFRAME_CFG_DI_N(x, n)       ((x) << ((n-1)*4)) /* n from 1 to 6 */
  92
  93 #define HDMI_CFG_DEVICE_EN              BIT(0)
  94 #define HDMI_CFG_HDMI_NOT_DVI           BIT(1)
  95 #define HDMI_CFG_HDCP_EN                BIT(2)
  96 #define HDMI_CFG_ESS_NOT_OESS           BIT(3)
  97 #define HDMI_CFG_H_SYNC_POL_NEG         BIT(4)
  98 #define HDMI_CFG_SINK_TERM_DET_EN       BIT(5)
  99 #define HDMI_CFG_V_SYNC_POL_NEG         BIT(6)
 100 #define HDMI_CFG_422_EN                 BIT(8)
 101 #define HDMI_CFG_FIFO_OVERRUN_CLR       BIT(12)
 102 #define HDMI_CFG_FIFO_UNDERRUN_CLR      BIT(13)
 103 #define HDMI_CFG_SW_RST_EN              BIT(31)
 104
 105 #define HDMI_INT_GLOBAL                 BIT(0)
 106 #define HDMI_INT_SW_RST                 BIT(1)
 107 #define HDMI_INT_PIX_CAP                BIT(3)
 108 #define HDMI_INT_HOT_PLUG               BIT(4)
 109 #define HDMI_INT_DLL_LCK                BIT(5)
 110 #define HDMI_INT_NEW_FRAME              BIT(6)
 111 #define HDMI_INT_GENCTRL_PKT            BIT(7)
 112 #define HDMI_INT_AUDIO_FIFO_XRUN        BIT(8)
 113 #define HDMI_INT_SINK_TERM_PRESENT      BIT(11)
 114
 115 #define HDMI_DEFAULT_INT (HDMI_INT_SINK_TERM_PRESENT \
 116                         | HDMI_INT_DLL_LCK \
 117                         | HDMI_INT_HOT_PLUG \
 118                         | HDMI_INT_GLOBAL)
 119
 120 #define HDMI_WORKING_INT (HDMI_INT_SINK_TERM_PRESENT \
 121                         | HDMI_INT_AUDIO_FIFO_XRUN \
 122                         | HDMI_INT_GENCTRL_PKT \
 123                         | HDMI_INT_NEW_FRAME \
 124                         | HDMI_INT_DLL_LCK \
 125                         | HDMI_INT_HOT_PLUG \
 126                         | HDMI_INT_PIX_CAP \
 127                         | HDMI_INT_SW_RST \
 128                         | HDMI_INT_GLOBAL)
 129
 130 #define HDMI_STA_SW_RST                 BIT(1)
 131
 132 #define HDMI_AUD_CFG_8CH                BIT(0)
 133 #define HDMI_AUD_CFG_SPDIF_DIV_2        BIT(1)
 134 #define HDMI_AUD_CFG_SPDIF_DIV_3        BIT(2)
 135 #define HDMI_AUD_CFG_SPDIF_CLK_DIV_4    (BIT(1) | BIT(2))
 136 #define HDMI_AUD_CFG_CTS_CLK_256FS      BIT(12)
 137 #define HDMI_AUD_CFG_DTS_INVALID        BIT(16)
 138 #define HDMI_AUD_CFG_ONE_BIT_INVALID    (BIT(18) | BIT(19) | BIT(20) |  BIT(21))
 139 #define HDMI_AUD_CFG_CH12_VALID BIT(28)
 140 #define HDMI_AUD_CFG_CH34_VALID BIT(29)
 141 #define HDMI_AUD_CFG_CH56_VALID BIT(30)
 142 #define HDMI_AUD_CFG_CH78_VALID BIT(31)
 143
 144 /* sample flat mask */
 145 #define HDMI_SAMPLE_FLAT_NO      0
 146 #define HDMI_SAMPLE_FLAT_SP0 BIT(0)
 147 #define HDMI_SAMPLE_FLAT_SP1 BIT(1)
 148 #define HDMI_SAMPLE_FLAT_SP2 BIT(2)
 149 #define HDMI_SAMPLE_FLAT_SP3 BIT(3)
 150 #define HDMI_SAMPLE_FLAT_ALL (HDMI_SAMPLE_FLAT_SP0 | HDMI_SAMPLE_FLAT_SP1 |\
 151                               HDMI_SAMPLE_FLAT_SP2 | HDMI_SAMPLE_FLAT_SP3)
 152
 153 #define HDMI_INFOFRAME_HEADER_TYPE(x)    (((x) & 0xff) <<  0)
 154 #define HDMI_INFOFRAME_HEADER_VERSION(x) (((x) & 0xff) <<  8)
 155 #define HDMI_INFOFRAME_HEADER_LEN(x)     (((x) & 0x0f) << 16)
 156
 157 struct sti_hdmi_connector {
 158         struct drm_connector drm_connector;
 159         struct drm_encoder *encoder;
 160         struct sti_hdmi *hdmi;
 161         struct drm_property *colorspace_property;
 162         struct drm_property *hdmi_mode_property;
 163 };
 164
 165 #define to_sti_hdmi_connector(x) \
 166         container_of(x, struct sti_hdmi_connector, drm_connector)
 167
 168 u32 hdmi_read(struct sti_hdmi *hdmi, int offset)
 169 {
 170         return readl(hdmi->regs + offset);
 171 }
 172
 173 void hdmi_write(struct sti_hdmi *hdmi, u32 val, int offset)
 174 {
 175         writel(val, hdmi->regs + offset);
 176 }
 177
 178 /**
 179  * HDMI interrupt handler threaded
 180  *
 181  * @irq: irq number
 182  * @arg: connector structure
 183  */
 184 static irqreturn_t hdmi_irq_thread(int irq, void *arg)
 185 {
 186         struct sti_hdmi *hdmi = arg;
 187
 188         /* Hot plug/unplug IRQ */
 189         if (hdmi->irq_status & HDMI_INT_HOT_PLUG) {
 190                 hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG;
 191                 if (hdmi->drm_dev)
 192                         drm_helper_hpd_irq_event(hdmi->drm_dev);
 193         }
 194
 195         /* Sw reset and PLL lock are exclusive so we can use the same
 196          * event to signal them
 197          */
 198         if (hdmi->irq_status & (HDMI_INT_SW_RST | HDMI_INT_DLL_LCK)) {
 199                 hdmi->event_received = true;
 200                 wake_up_interruptible(&hdmi->wait_event);
 201         }
 202
 203         /* Audio FIFO underrun IRQ */
 204         if (hdmi->irq_status & HDMI_INT_AUDIO_FIFO_XRUN)
 205                 DRM_INFO("Warning: audio FIFO underrun occurs!\n");
 206
 207         return IRQ_HANDLED;
 208 }
 209
 210 /**
 211  * HDMI interrupt handler
 212  *
 213  * @irq: irq number
 214  * @arg: connector structure
 215  */
 216 static irqreturn_t hdmi_irq(int irq, void *arg)
 217 {
 218         struct sti_hdmi *hdmi = arg;
 219
 220         /* read interrupt status */
 221         hdmi->irq_status = hdmi_read(hdmi, HDMI_INT_STA);
 222
 223         /* clear interrupt status */
 224         hdmi_write(hdmi, hdmi->irq_status, HDMI_INT_CLR);
 225
 226         /* force sync bus write */
 227         hdmi_read(hdmi, HDMI_INT_STA);
 228
 229         return IRQ_WAKE_THREAD;
 230 }
 231
 232 /**
 233  * Set hdmi active area depending on the drm display mode selected
 234  *
 235  * @hdmi: pointer on the hdmi internal structure
 236  */
 237 static void hdmi_active_area(struct sti_hdmi *hdmi)
 238 {
 239         u32 xmin, xmax;
 240         u32 ymin, ymax;
 241
 242         xmin = sti_vtg_get_pixel_number(hdmi->mode, 1);
 243         xmax = sti_vtg_get_pixel_number(hdmi->mode, hdmi->mode.hdisplay);
 244         ymin = sti_vtg_get_line_number(hdmi->mode, 0);
 245         ymax = sti_vtg_get_line_number(hdmi->mode, hdmi->mode.vdisplay - 1);
 246
 247         hdmi_write(hdmi, xmin, HDMI_ACTIVE_VID_XMIN);
 248         hdmi_write(hdmi, xmax, HDMI_ACTIVE_VID_XMAX);
 249         hdmi_write(hdmi, ymin, HDMI_ACTIVE_VID_YMIN);
 250         hdmi_write(hdmi, ymax, HDMI_ACTIVE_VID_YMAX);
 251 }
 252
 253 /**
 254  * Overall hdmi configuration
 255  *
 256  * @hdmi: pointer on the hdmi internal structure
 257  */
 258 static void hdmi_config(struct sti_hdmi *hdmi)
 259 {
 260         u32 conf;
 261
 262         DRM_DEBUG_DRIVER("\n");
 263
 264         /* Clear overrun and underrun fifo */
 265         conf = HDMI_CFG_FIFO_OVERRUN_CLR | HDMI_CFG_FIFO_UNDERRUN_CLR;
 266
 267         /* Select encryption type and the framing mode */
 268         conf |= HDMI_CFG_ESS_NOT_OESS;
 269         if (hdmi->hdmi_mode == HDMI_MODE_HDMI)
 270                 conf |= HDMI_CFG_HDMI_NOT_DVI;
 271
 272         /* Enable sink term detection */
 273         conf |= HDMI_CFG_SINK_TERM_DET_EN;
 274
 275         /* Set Hsync polarity */
 276         if (hdmi->mode.flags & DRM_MODE_FLAG_NHSYNC) {
 277                 DRM_DEBUG_DRIVER("H Sync Negative\n");
 278                 conf |= HDMI_CFG_H_SYNC_POL_NEG;
 279         }
 280
 281         /* Set Vsync polarity */
 282         if (hdmi->mode.flags & DRM_MODE_FLAG_NVSYNC) {
 283                 DRM_DEBUG_DRIVER("V Sync Negative\n");
 284                 conf |= HDMI_CFG_V_SYNC_POL_NEG;
 285         }
 286
 287         /* Enable HDMI */
 288         conf |= HDMI_CFG_DEVICE_EN;
 289
 290         hdmi_write(hdmi, conf, HDMI_CFG);
 291 }
 292
 293 /*
 294  * Helper to reset info frame
 295  *
 296  * @hdmi: pointer on the hdmi internal structure
 297  * @slot: infoframe to reset
 298  */
 299 static void hdmi_infoframe_reset(struct sti_hdmi *hdmi,
 300                                  u32 slot)
 301 {
 302         u32 val, i;
 303         u32 head_offset, pack_offset;
 304
 305         switch (slot) {
 306         case HDMI_IFRAME_SLOT_AVI:
 307                 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI);
 308                 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI);
 309                 break;
 310         case HDMI_IFRAME_SLOT_AUDIO:
 311                 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO);
 312                 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO);
 313                 break;
 314         case HDMI_IFRAME_SLOT_VENDOR:
 315                 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_VENDOR);
 316                 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_VENDOR);
 317                 break;
 318         default:
 319                 DRM_ERROR("unsupported infoframe slot: %#x\n", slot);
 320                 return;
 321         }
 322
 323         /* Disable transmission for the selected slot */
 324         val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
 325         val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, slot);
 326         hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
 327
 328         /* Reset info frame registers */
 329         hdmi_write(hdmi, 0x0, head_offset);
 330         for (i = 0; i < HDMI_SW_DI_MAX_WORD; i += sizeof(u32))
 331                 hdmi_write(hdmi, 0x0, pack_offset + i);
 332 }
 333
 334 /**
 335  * Helper to concatenate infoframe in 32 bits word
 336  *
 337  * @ptr: pointer on the hdmi internal structure
 338  * @data: infoframe to write
 339  * @size: size to write
 340  */
 341 static inline unsigned int hdmi_infoframe_subpack(const u8 *ptr, size_t size)
 342 {
 343         unsigned long value = 0;
 344         size_t i;
 345
 346         for (i = size; i > 0; i--)
 347                 value = (value << 8) | ptr[i - 1];
 348
 349         return value;
 350 }
 351
 352 /**
 353  * Helper to write info frame
 354  *
 355  * @hdmi: pointer on the hdmi internal structure
 356  * @data: infoframe to write
 357  * @size: size to write
 358  */
 359 static void hdmi_infoframe_write_infopack(struct sti_hdmi *hdmi,
 360                                           const u8 *data,
 361                                           size_t size)
 362 {
 363         const u8 *ptr = data;
 364         u32 val, slot, mode, i;
 365         u32 head_offset, pack_offset;
 366
 367         switch (*ptr) {
 368         case HDMI_INFOFRAME_TYPE_AVI:
 369                 slot = HDMI_IFRAME_SLOT_AVI;
 370                 mode = HDMI_IFRAME_FIELD;
 371                 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI);
 372                 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI);
 373                 break;
 374         case HDMI_INFOFRAME_TYPE_AUDIO:
 375                 slot = HDMI_IFRAME_SLOT_AUDIO;
 376                 mode = HDMI_IFRAME_FRAME;
 377                 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO);
 378                 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO);
 379                 break;
 380         case HDMI_INFOFRAME_TYPE_VENDOR:
 381                 slot = HDMI_IFRAME_SLOT_VENDOR;
 382                 mode = HDMI_IFRAME_FRAME;
 383                 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_VENDOR);
 384                 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_VENDOR);
 385                 break;
 386         default:
 387                 DRM_ERROR("unsupported infoframe type: %#x\n", *ptr);
 388                 return;
 389         }
 390
 391         /* Disable transmission slot for updated infoframe */
 392         val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
 393         val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, slot);
 394         hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
 395
 396         val = HDMI_INFOFRAME_HEADER_TYPE(*ptr++);
 397         val |= HDMI_INFOFRAME_HEADER_VERSION(*ptr++);
 398         val |= HDMI_INFOFRAME_HEADER_LEN(*ptr++);
 399         writel(val, hdmi->regs + head_offset);
 400
 401         /*
 402          * Each subpack contains 4 bytes
 403          * The First Bytes of the first subpacket must contain the checksum
 404          * Packet size is increase by one.
 405          */
 406         size = size - HDMI_INFOFRAME_HEADER_SIZE + 1;
 407         for (i = 0; i < size; i += sizeof(u32)) {
 408                 size_t num;
 409
 410                 num = min_t(size_t, size - i, sizeof(u32));
 411                 val = hdmi_infoframe_subpack(ptr, num);
 412                 ptr += sizeof(u32);
 413                 writel(val, hdmi->regs + pack_offset + i);
 414         }
 415
 416         /* Enable transmission slot for updated infoframe */
 417         val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
 418         val |= HDMI_IFRAME_CFG_DI_N(mode, slot);
 419         hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
 420 }
 421
 422 /**
 423  * Prepare and configure the AVI infoframe
 424  *
 425  * AVI infoframe are transmitted at least once per two video field and
 426  * contains information about HDMI transmission mode such as color space,
 427  * colorimetry, ...
 428  *
 429  * @hdmi: pointer on the hdmi internal structure
 430  *
 431  * Return negative value if error occurs
 432  */
 433 static int hdmi_avi_infoframe_config(struct sti_hdmi *hdmi)
 434 {
 435         struct drm_display_mode *mode = &hdmi->mode;
 436         struct hdmi_avi_infoframe infoframe;
 437         u8 buffer[HDMI_INFOFRAME_SIZE(AVI)];
 438         int ret;
 439
 440         DRM_DEBUG_DRIVER("\n");
 441
 442         ret = drm_hdmi_avi_infoframe_from_display_mode(&infoframe, mode);
 443         if (ret < 0) {
 444                 DRM_ERROR("failed to setup AVI infoframe: %d\n", ret);
 445                 return ret;
 446         }
 447
 448         /* fixed infoframe configuration not linked to the mode */
 449         infoframe.colorspace = hdmi->colorspace;
 450         infoframe.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
 451         infoframe.colorimetry = HDMI_COLORIMETRY_NONE;
 452
 453         ret = hdmi_avi_infoframe_pack(&infoframe, buffer, sizeof(buffer));
 454         if (ret < 0) {
 455                 DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
 456                 return ret;
 457         }
 458
 459         hdmi_infoframe_write_infopack(hdmi, buffer, ret);
 460
 461         return 0;
 462 }
 463
 464 /**
 465  * Prepare and configure the AUDIO infoframe
 466  *
 467  * AUDIO infoframe are transmitted once per frame and
 468  * contains information about HDMI transmission mode such as audio codec,
 469  * sample size, ...
 470  *
 471  * @hdmi: pointer on the hdmi internal structure
 472  *
 473  * Return negative value if error occurs
 474  */
 475 static int hdmi_audio_infoframe_config(struct sti_hdmi *hdmi)
 476 {
 477         struct hdmi_audio_params *audio = &hdmi->audio;
 478         u8 buffer[HDMI_INFOFRAME_SIZE(AUDIO)];
 479         int ret, val;
 480
 481         DRM_DEBUG_DRIVER("enter %s, AIF %s\n", __func__,
 482                          audio->enabled ? "enable" : "disable");
 483         if (audio->enabled) {
 484                 /* set audio parameters stored*/
 485                 ret = hdmi_audio_infoframe_pack(&audio->cea, buffer,
 486                                                 sizeof(buffer));
 487                 if (ret < 0) {
 488                         DRM_ERROR("failed to pack audio infoframe: %d\n", ret);
 489                         return ret;
 490                 }
 491                 hdmi_infoframe_write_infopack(hdmi, buffer, ret);
 492         } else {
 493                 /*disable audio info frame transmission */
 494                 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
 495                 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK,
 496                                              HDMI_IFRAME_SLOT_AUDIO);
 497                 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
 498         }
 499
 500         return 0;
 501 }
 502
 503 /*
 504  * Prepare and configure the VS infoframe
 505  *
 506  * Vendor Specific infoframe are transmitted once per frame and
 507  * contains vendor specific information.
 508  *
 509  * @hdmi: pointer on the hdmi internal structure
 510  *
 511  * Return negative value if error occurs
 512  */
 513 #define HDMI_VENDOR_INFOFRAME_MAX_SIZE 6
 514 static int hdmi_vendor_infoframe_config(struct sti_hdmi *hdmi)
 515 {
 516         struct drm_display_mode *mode = &hdmi->mode;
 517         struct hdmi_vendor_infoframe infoframe;
 518         u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_VENDOR_INFOFRAME_MAX_SIZE];
 519         int ret;
 520
 521         DRM_DEBUG_DRIVER("\n");
 522
 523         ret = drm_hdmi_vendor_infoframe_from_display_mode(&infoframe, mode);
 524         if (ret < 0) {
 525                 /*
 526                  * Going into that statement does not means vendor infoframe
 527                  * fails. It just informed us that vendor infoframe is not
 528                  * needed for the selected mode. Only  4k or stereoscopic 3D
 529                  * mode requires vendor infoframe. So just simply return 0.
 530                  */
 531                 return 0;
 532         }
 533
 534         ret = hdmi_vendor_infoframe_pack(&infoframe, buffer, sizeof(buffer));
 535         if (ret < 0) {
 536                 DRM_ERROR("failed to pack VS infoframe: %d\n", ret);
 537                 return ret;
 538         }
 539
 540         hdmi_infoframe_write_infopack(hdmi, buffer, ret);
 541
 542         return 0;
 543 }
 544
 545 /**
 546  * Software reset of the hdmi subsystem
 547  *
 548  * @hdmi: pointer on the hdmi internal structure
 549  *
 550  */
 551 #define HDMI_TIMEOUT_SWRESET  100   /*milliseconds */
 552 static void hdmi_swreset(struct sti_hdmi *hdmi)
 553 {
 554         u32 val;
 555
 556         DRM_DEBUG_DRIVER("\n");
 557
 558         /* Enable hdmi_audio clock only during hdmi reset */
 559         if (clk_prepare_enable(hdmi->clk_audio))
 560                 DRM_INFO("Failed to prepare/enable hdmi_audio clk\n");
 561
 562         /* Sw reset */
 563         hdmi->event_received = false;
 564
 565         val = hdmi_read(hdmi, HDMI_CFG);
 566         val |= HDMI_CFG_SW_RST_EN;
 567         hdmi_write(hdmi, val, HDMI_CFG);
 568
 569         /* Wait reset completed */
 570         wait_event_interruptible_timeout(hdmi->wait_event,
 571                                          hdmi->event_received,
 572                                          msecs_to_jiffies
 573                                          (HDMI_TIMEOUT_SWRESET));
 574
 575         /*
 576          * HDMI_STA_SW_RST bit is set to '1' when SW_RST bit in HDMI_CFG is
 577          * set to '1' and clk_audio is running.
 578          */
 579         if ((hdmi_read(hdmi, HDMI_STA) & HDMI_STA_SW_RST) == 0)
 580                 DRM_DEBUG_DRIVER("Warning: HDMI sw reset timeout occurs\n");
 581
 582         val = hdmi_read(hdmi, HDMI_CFG);
 583         val &= ~HDMI_CFG_SW_RST_EN;
 584         hdmi_write(hdmi, val, HDMI_CFG);
 585
 586         /* Disable hdmi_audio clock. Not used anymore for drm purpose */
 587         clk_disable_unprepare(hdmi->clk_audio);
 588 }
 589
 590 #define DBGFS_PRINT_STR(str1, str2) seq_printf(s, "%-24s %s\n", str1, str2)
 591 #define DBGFS_PRINT_INT(str1, int2) seq_printf(s, "%-24s %d\n", str1, int2)
 592 #define DBGFS_DUMP(str, reg) seq_printf(s, "%s  %-25s 0x%08X", str, #reg, \
 593                                         hdmi_read(hdmi, reg))
 594 #define DBGFS_DUMP_DI(reg, slot) DBGFS_DUMP("\n", reg(slot))
 595
 596 static void hdmi_dbg_cfg(struct seq_file *s, int val)
 597 {
 598         int tmp;
 599
 600         seq_puts(s, "\t");
 601         tmp = val & HDMI_CFG_HDMI_NOT_DVI;
 602         DBGFS_PRINT_STR("mode:", tmp ? "HDMI" : "DVI");
 603         seq_puts(s, "\t\t\t\t\t");
 604         tmp = val & HDMI_CFG_HDCP_EN;
 605         DBGFS_PRINT_STR("HDCP:", tmp ? "enable" : "disable");
 606         seq_puts(s, "\t\t\t\t\t");
 607         tmp = val & HDMI_CFG_ESS_NOT_OESS;
 608         DBGFS_PRINT_STR("HDCP mode:", tmp ? "ESS enable" : "OESS enable");
 609         seq_puts(s, "\t\t\t\t\t");
 610         tmp = val & HDMI_CFG_SINK_TERM_DET_EN;
 611         DBGFS_PRINT_STR("Sink term detection:", tmp ? "enable" : "disable");
 612         seq_puts(s, "\t\t\t\t\t");
 613         tmp = val & HDMI_CFG_H_SYNC_POL_NEG;
 614         DBGFS_PRINT_STR("Hsync polarity:", tmp ? "inverted" : "normal");
 615         seq_puts(s, "\t\t\t\t\t");
 616         tmp = val & HDMI_CFG_V_SYNC_POL_NEG;
 617         DBGFS_PRINT_STR("Vsync polarity:", tmp ? "inverted" : "normal");
 618         seq_puts(s, "\t\t\t\t\t");
 619         tmp = val & HDMI_CFG_422_EN;
 620         DBGFS_PRINT_STR("YUV422 format:", tmp ? "enable" : "disable");
 621 }
 622
 623 static void hdmi_dbg_sta(struct seq_file *s, int val)
 624 {
 625         int tmp;
 626
 627         seq_puts(s, "\t");
 628         tmp = (val & HDMI_STA_DLL_LCK);
 629         DBGFS_PRINT_STR("pll:", tmp ? "locked" : "not locked");
 630         seq_puts(s, "\t\t\t\t\t");
 631         tmp = (val & HDMI_STA_HOT_PLUG);
 632         DBGFS_PRINT_STR("hdmi cable:", tmp ? "connected" : "not connected");
 633 }
 634
 635 static void hdmi_dbg_sw_di_cfg(struct seq_file *s, int val)
 636 {
 637         int tmp;
 638         char *const en_di[] = {"no transmission",
 639                                "single transmission",
 640                                "once every field",
 641                                "once every frame"};
 642
 643         seq_puts(s, "\t");
 644         tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 1));
 645         DBGFS_PRINT_STR("Data island 1:", en_di[tmp]);
 646         seq_puts(s, "\t\t\t\t\t");
 647         tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 2)) >> 4;
 648         DBGFS_PRINT_STR("Data island 2:", en_di[tmp]);
 649         seq_puts(s, "\t\t\t\t\t");
 650         tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 3)) >> 8;
 651         DBGFS_PRINT_STR("Data island 3:", en_di[tmp]);
 652         seq_puts(s, "\t\t\t\t\t");
 653         tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 4)) >> 12;
 654         DBGFS_PRINT_STR("Data island 4:", en_di[tmp]);
 655         seq_puts(s, "\t\t\t\t\t");
 656         tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 5)) >> 16;
 657         DBGFS_PRINT_STR("Data island 5:", en_di[tmp]);
 658         seq_puts(s, "\t\t\t\t\t");
 659         tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 6)) >> 20;
 660         DBGFS_PRINT_STR("Data island 6:", en_di[tmp]);
 661 }
 662
 663 static int hdmi_dbg_show(struct seq_file *s, void *data)
 664 {
 665         struct drm_info_node *node = s->private;
 666         struct sti_hdmi *hdmi = (struct sti_hdmi *)node->info_ent->data;
 667
 668         seq_printf(s, "HDMI: (vaddr = 0x%p)", hdmi->regs);
 669         DBGFS_DUMP("\n", HDMI_CFG);
 670         hdmi_dbg_cfg(s, hdmi_read(hdmi, HDMI_CFG));
 671         DBGFS_DUMP("", HDMI_INT_EN);
 672         DBGFS_DUMP("\n", HDMI_STA);
 673         hdmi_dbg_sta(s, hdmi_read(hdmi, HDMI_STA));
 674         DBGFS_DUMP("", HDMI_ACTIVE_VID_XMIN);
 675         seq_puts(s, "\t");
 676         DBGFS_PRINT_INT("Xmin:", hdmi_read(hdmi, HDMI_ACTIVE_VID_XMIN));
 677         DBGFS_DUMP("", HDMI_ACTIVE_VID_XMAX);
 678         seq_puts(s, "\t");
 679         DBGFS_PRINT_INT("Xmax:", hdmi_read(hdmi, HDMI_ACTIVE_VID_XMAX));
 680         DBGFS_DUMP("", HDMI_ACTIVE_VID_YMIN);
 681         seq_puts(s, "\t");
 682         DBGFS_PRINT_INT("Ymin:", hdmi_read(hdmi, HDMI_ACTIVE_VID_YMIN));
 683         DBGFS_DUMP("", HDMI_ACTIVE_VID_YMAX);
 684         seq_puts(s, "\t");
 685         DBGFS_PRINT_INT("Ymax:", hdmi_read(hdmi, HDMI_ACTIVE_VID_YMAX));
 686         DBGFS_DUMP("", HDMI_SW_DI_CFG);
 687         hdmi_dbg_sw_di_cfg(s, hdmi_read(hdmi, HDMI_SW_DI_CFG));
 688
 689         DBGFS_DUMP("\n", HDMI_AUDIO_CFG);
 690         DBGFS_DUMP("\n", HDMI_SPDIF_FIFO_STATUS);
 691         DBGFS_DUMP("\n", HDMI_AUDN);
 692
 693         seq_printf(s, "\n AVI Infoframe (Data Island slot N=%d):",
 694                    HDMI_IFRAME_SLOT_AVI);
 695         DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_AVI);
 696         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_AVI);
 697         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_AVI);
 698         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_AVI);
 699         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_AVI);
 700         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_AVI);
 701         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_AVI);
 702         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_AVI);
 703         seq_puts(s, "\n");
 704         seq_printf(s, "\n AUDIO Infoframe (Data Island slot N=%d):",
 705                    HDMI_IFRAME_SLOT_AUDIO);
 706         DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_AUDIO);
 707         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_AUDIO);
 708         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_AUDIO);
 709         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_AUDIO);
 710         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_AUDIO);
 711         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_AUDIO);
 712         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_AUDIO);
 713         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_AUDIO);
 714         seq_puts(s, "\n");
 715         seq_printf(s, "\n VENDOR SPECIFIC Infoframe (Data Island slot N=%d):",
 716                    HDMI_IFRAME_SLOT_VENDOR);
 717         DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_VENDOR);
 718         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_VENDOR);
 719         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_VENDOR);
 720         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_VENDOR);
 721         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_VENDOR);
 722         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_VENDOR);
 723         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_VENDOR);
 724         DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_VENDOR);
 725         seq_puts(s, "\n");
 726
 727         return 0;
 728 }
 729
 730 static struct drm_info_list hdmi_debugfs_files[] = {
 731         { "hdmi", hdmi_dbg_show, 0, NULL },
 732 };
 733
 734 static void hdmi_debugfs_exit(struct sti_hdmi *hdmi, struct drm_minor *minor)
 735 {
 736         drm_debugfs_remove_files(hdmi_debugfs_files,
 737                                  ARRAY_SIZE(hdmi_debugfs_files),
 738                                  minor);
 739 }
 740
 741 static int hdmi_debugfs_init(struct sti_hdmi *hdmi, struct drm_minor *minor)
 742 {
 743         unsigned int i;
 744
 745         for (i = 0; i < ARRAY_SIZE(hdmi_debugfs_files); i++)
 746                 hdmi_debugfs_files[i].data = hdmi;
 747
 748         return drm_debugfs_create_files(hdmi_debugfs_files,
 749                                         ARRAY_SIZE(hdmi_debugfs_files),
 750                                         minor->debugfs_root, minor);
 751 }
 752
 753 static void sti_hdmi_disable(struct drm_bridge *bridge)
 754 {
 755         struct sti_hdmi *hdmi = bridge->driver_private;
 756
 757         u32 val = hdmi_read(hdmi, HDMI_CFG);
 758
 759         if (!hdmi->enabled)
 760                 return;
 761
 762         DRM_DEBUG_DRIVER("\n");
 763
 764         /* Disable HDMI */
 765         val &= ~HDMI_CFG_DEVICE_EN;
 766         hdmi_write(hdmi, val, HDMI_CFG);
 767
 768         hdmi_write(hdmi, 0xffffffff, HDMI_INT_CLR);
 769
 770         /* Stop the phy */
 771         hdmi->phy_ops->stop(hdmi);
 772
 773         /* Reset info frame transmission */
 774         hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AVI);
 775         hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AUDIO);
 776         hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_VENDOR);
 777
 778         /* Set the default channel data to be a dark red */
 779         hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL0_DAT);
 780         hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL1_DAT);
 781         hdmi_write(hdmi, 0x0060, HDMI_DFLT_CHL2_DAT);
 782
 783         /* Disable/unprepare hdmi clock */
 784         clk_disable_unprepare(hdmi->clk_phy);
 785         clk_disable_unprepare(hdmi->clk_tmds);
 786         clk_disable_unprepare(hdmi->clk_pix);
 787
 788         hdmi->enabled = false;
 789 }
 790
 791 static void sti_hdmi_pre_enable(struct drm_bridge *bridge)
 792 {
 793         struct sti_hdmi *hdmi = bridge->driver_private;
 794
 795         DRM_DEBUG_DRIVER("\n");
 796
 797         if (hdmi->enabled)
 798                 return;
 799
 800         /* Prepare/enable clocks */
 801         if (clk_prepare_enable(hdmi->clk_pix))
 802                 DRM_ERROR("Failed to prepare/enable hdmi_pix clk\n");
 803         if (clk_prepare_enable(hdmi->clk_tmds))
 804                 DRM_ERROR("Failed to prepare/enable hdmi_tmds clk\n");
 805         if (clk_prepare_enable(hdmi->clk_phy))
 806                 DRM_ERROR("Failed to prepare/enable hdmi_rejec_pll clk\n");
 807
 808         hdmi->enabled = true;
 809
 810         /* Program hdmi serializer and start phy */
 811         if (!hdmi->phy_ops->start(hdmi)) {
 812                 DRM_ERROR("Unable to start hdmi phy\n");
 813                 return;
 814         }
 815
 816         /* Program hdmi active area */
 817         hdmi_active_area(hdmi);
 818
 819         /* Enable working interrupts */
 820         hdmi_write(hdmi, HDMI_WORKING_INT, HDMI_INT_EN);
 821
 822         /* Program hdmi config */
 823         hdmi_config(hdmi);
 824
 825         /* Program AVI infoframe */
 826         if (hdmi_avi_infoframe_config(hdmi))
 827                 DRM_ERROR("Unable to configure AVI infoframe\n");
 828
 829         /* Program AUDIO infoframe */
 830         if (hdmi_audio_infoframe_config(hdmi))
 831                 DRM_ERROR("Unable to configure AUDIO infoframe\n");
 832
 833         /* Program VS infoframe */
 834         if (hdmi_vendor_infoframe_config(hdmi))
 835                 DRM_ERROR("Unable to configure VS infoframe\n");
 836
 837         /* Sw reset */
 838         hdmi_swreset(hdmi);
 839 }
 840
 841 static void sti_hdmi_set_mode(struct drm_bridge *bridge,
 842                 struct drm_display_mode *mode,
 843                 struct drm_display_mode *adjusted_mode)
 844 {
 845         struct sti_hdmi *hdmi = bridge->driver_private;
 846         int ret;
 847
 848         DRM_DEBUG_DRIVER("\n");
 849
 850         /* Copy the drm display mode in the connector local structure */
 851         memcpy(&hdmi->mode, mode, sizeof(struct drm_display_mode));
 852
 853         /* Update clock framerate according to the selected mode */
 854         ret = clk_set_rate(hdmi->clk_pix, mode->clock * 1000);
 855         if (ret < 0) {
 856                 DRM_ERROR("Cannot set rate (%dHz) for hdmi_pix clk\n",
 857                           mode->clock * 1000);
 858                 return;
 859         }
 860         ret = clk_set_rate(hdmi->clk_phy, mode->clock * 1000);
 861         if (ret < 0) {
 862                 DRM_ERROR("Cannot set rate (%dHz) for hdmi_rejection_pll clk\n",
 863                           mode->clock * 1000);
 864                 return;
 865         }
 866 }
 867
 868 static void sti_hdmi_bridge_nope(struct drm_bridge *bridge)
 869 {
 870         /* do nothing */
 871 }
 872
 873 static const struct drm_bridge_funcs sti_hdmi_bridge_funcs = {
 874         .pre_enable = sti_hdmi_pre_enable,
 875         .enable = sti_hdmi_bridge_nope,
 876         .disable = sti_hdmi_disable,
 877         .post_disable = sti_hdmi_bridge_nope,
 878         .mode_set = sti_hdmi_set_mode,
 879 };
 880
 881 static int sti_hdmi_connector_get_modes(struct drm_connector *connector)
 882 {
 883         struct sti_hdmi_connector *hdmi_connector
 884                 = to_sti_hdmi_connector(connector);
 885         struct sti_hdmi *hdmi = hdmi_connector->hdmi;
 886         struct edid *edid;
 887         int count;
 888
 889         DRM_DEBUG_DRIVER("\n");
 890
 891         edid = drm_get_edid(connector, hdmi->ddc_adapt);
 892         if (!edid)
 893                 goto fail;
 894
 895         count = drm_add_edid_modes(connector, edid);
 896         drm_mode_connector_update_edid_property(connector, edid);
 897         drm_edid_to_eld(connector, edid);
 898
 899         kfree(edid);
 900         return count;
 901
 902 fail:
 903         DRM_ERROR("Can't read HDMI EDID\n");
 904         return 0;
 905 }
 906
 907 #define CLK_TOLERANCE_HZ 50
 908
 909 static int sti_hdmi_connector_mode_valid(struct drm_connector *connector,
 910                                         struct drm_display_mode *mode)
 911 {
 912         int target = mode->clock * 1000;
 913         int target_min = target - CLK_TOLERANCE_HZ;
 914         int target_max = target + CLK_TOLERANCE_HZ;
 915         int result;
 916         struct sti_hdmi_connector *hdmi_connector
 917                 = to_sti_hdmi_connector(connector);
 918         struct sti_hdmi *hdmi = hdmi_connector->hdmi;
 919
 920
 921         result = clk_round_rate(hdmi->clk_pix, target);
 922
 923         DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n",
 924                          target, result);
 925
 926         if ((result < target_min) || (result > target_max)) {
 927                 DRM_DEBUG_DRIVER("hdmi pixclk=%d not supported\n", target);
 928                 return MODE_BAD;
 929         }
 930
 931         return MODE_OK;
 932 }
 933
 934 static const
 935 struct drm_connector_helper_funcs sti_hdmi_connector_helper_funcs = {
 936         .get_modes = sti_hdmi_connector_get_modes,
 937         .mode_valid = sti_hdmi_connector_mode_valid,
 938 };
 939
 940 /* get detection status of display device */
 941 static enum drm_connector_status
 942 sti_hdmi_connector_detect(struct drm_connector *connector, bool force)
 943 {
 944         struct sti_hdmi_connector *hdmi_connector
 945                 = to_sti_hdmi_connector(connector);
 946         struct sti_hdmi *hdmi = hdmi_connector->hdmi;
 947
 948         DRM_DEBUG_DRIVER("\n");
 949
 950         if (hdmi->hpd) {
 951                 DRM_DEBUG_DRIVER("hdmi cable connected\n");
 952                 return connector_status_connected;
 953         }
 954
 955         DRM_DEBUG_DRIVER("hdmi cable disconnected\n");
 956         return connector_status_disconnected;
 957 }
 958
 959 static void sti_hdmi_connector_init_property(struct drm_device *drm_dev,
 960                                              struct drm_connector *connector)
 961 {
 962         struct sti_hdmi_connector *hdmi_connector
 963                 = to_sti_hdmi_connector(connector);
 964         struct sti_hdmi *hdmi = hdmi_connector->hdmi;
 965         struct drm_property *prop;
 966
 967         /* colorspace property */
 968         hdmi->colorspace = DEFAULT_COLORSPACE_MODE;
 969         prop = drm_property_create_enum(drm_dev, 0, "colorspace",
 970                                         colorspace_mode_names,
 971                                         ARRAY_SIZE(colorspace_mode_names));
 972         if (!prop) {
 973                 DRM_ERROR("fails to create colorspace property\n");
 974                 return;
 975         }
 976         hdmi_connector->colorspace_property = prop;
 977         drm_object_attach_property(&connector->base, prop, hdmi->colorspace);
 978
 979         /* hdmi_mode property */
 980         hdmi->hdmi_mode = DEFAULT_HDMI_MODE;
 981         prop = drm_property_create_enum(drm_dev, 0, "hdmi_mode",
 982                                         hdmi_mode_names,
 983                                         ARRAY_SIZE(hdmi_mode_names));
 984         if (!prop) {
 985                 DRM_ERROR("fails to create colorspace property\n");
 986                 return;
 987         }
 988         hdmi_connector->hdmi_mode_property = prop;
 989         drm_object_attach_property(&connector->base, prop, hdmi->hdmi_mode);
 990
 991 }
 992
 993 static int
 994 sti_hdmi_connector_set_property(struct drm_connector *connector,
 995                                 struct drm_connector_state *state,
 996                                 struct drm_property *property,
 997                                 uint64_t val)
 998 {
 999         struct sti_hdmi_connector *hdmi_connector
1000                 = to_sti_hdmi_connector(connector);
1001         struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1002
1003         if (property == hdmi_connector->colorspace_property) {
1004                 hdmi->colorspace = val;
1005                 return 0;
1006         }
1007
1008         if (property == hdmi_connector->hdmi_mode_property) {
1009                 hdmi->hdmi_mode = val;
1010                 return 0;
1011         }
1012
1013         DRM_ERROR("failed to set hdmi connector property\n");
1014         return -EINVAL;
1015 }
1016
1017 static int
1018 sti_hdmi_connector_get_property(struct drm_connector *connector,
1019                                 const struct drm_connector_state *state,
1020                                 struct drm_property *property,
1021                                 uint64_t *val)
1022 {
1023         struct sti_hdmi_connector *hdmi_connector
1024                 = to_sti_hdmi_connector(connector);
1025         struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1026
1027         if (property == hdmi_connector->colorspace_property) {
1028                 *val = hdmi->colorspace;
1029                 return 0;
1030         }
1031
1032         if (property == hdmi_connector->hdmi_mode_property) {
1033                 *val = hdmi->hdmi_mode;
1034                 return 0;
1035         }
1036
1037         DRM_ERROR("failed to get hdmi connector property\n");
1038         return -EINVAL;
1039 }
1040
1041 static int sti_hdmi_late_register(struct drm_connector *connector)
1042 {
1043         struct sti_hdmi_connector *hdmi_connector
1044                 = to_sti_hdmi_connector(connector);
1045         struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1046
1047         if (hdmi_debugfs_init(hdmi, hdmi->drm_dev->primary)) {
1048                 DRM_ERROR("HDMI debugfs setup failed\n");
1049                 return -EINVAL;
1050         }
1051
1052         return 0;
1053 }
1054
1055 static const struct drm_connector_funcs sti_hdmi_connector_funcs = {
1056         .dpms = drm_atomic_helper_connector_dpms,
1057         .fill_modes = drm_helper_probe_single_connector_modes,
1058         .detect = sti_hdmi_connector_detect,
1059         .destroy = drm_connector_cleanup,
1060         .reset = drm_atomic_helper_connector_reset,
1061         .set_property = drm_atomic_helper_connector_set_property,
1062         .atomic_set_property = sti_hdmi_connector_set_property,
1063         .atomic_get_property = sti_hdmi_connector_get_property,
1064         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
1065         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
1066         .late_register = sti_hdmi_late_register,
1067 };
1068
1069 static struct drm_encoder *sti_hdmi_find_encoder(struct drm_device *dev)
1070 {
1071         struct drm_encoder *encoder;
1072
1073         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1074                 if (encoder->encoder_type == DRM_MODE_ENCODER_TMDS)
1075                         return encoder;
1076         }
1077
1078         return NULL;
1079 }
1080
1081 /**
1082  * sti_hdmi_audio_get_non_coherent_n() - get N parameter for non-coherent
1083  * clocks. None-coherent clocks means that audio and TMDS clocks have not the
1084  * same source (drifts between clocks). In this case assumption is that CTS is
1085  * automatically calculated by hardware.
1086  *
1087  * @audio_fs: audio frame clock frequency in Hz
1088  *
1089  * Values computed are based on table described in HDMI specification 1.4b
1090  *
1091  * Returns n value.
1092  */
1093 static int sti_hdmi_audio_get_non_coherent_n(unsigned int audio_fs)
1094 {
1095         unsigned int n;
1096
1097         switch (audio_fs) {
1098         case 32000:
1099                 n = 4096;
1100                 break;
1101         case 44100:
1102                 n = 6272;
1103                 break;
1104         case 48000:
1105                 n = 6144;
1106                 break;
1107         case 88200:
1108                 n = 6272 * 2;
1109                 break;
1110         case 96000:
1111                 n = 6144 * 2;
1112                 break;
1113         case 176400:
1114                 n = 6272 * 4;
1115                 break;
1116         case 192000:
1117                 n = 6144 * 4;
1118                 break;
1119         default:
1120                 /* Not pre-defined, recommended value: 128 * fs / 1000 */
1121                 n = (audio_fs * 128) / 1000;
1122         }
1123
1124         return n;
1125 }
1126
1127 static int hdmi_audio_configure(struct sti_hdmi *hdmi,
1128                                 struct hdmi_audio_params *params)
1129 {
1130         int audio_cfg, n;
1131         struct hdmi_audio_infoframe *info = &params->cea;
1132
1133         DRM_DEBUG_DRIVER("\n");
1134
1135         if (!hdmi->enabled)
1136                 return 0;
1137
1138         /* update N parameter */
1139         n = sti_hdmi_audio_get_non_coherent_n(params->sample_rate);
1140
1141         DRM_DEBUG_DRIVER("Audio rate = %d Hz, TMDS clock = %d Hz, n = %d\n",
1142                          params->sample_rate, hdmi->mode.clock * 1000, n);
1143         hdmi_write(hdmi, n, HDMI_AUDN);
1144
1145         /* update HDMI registers according to configuration */
1146         audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
1147                     HDMI_AUD_CFG_ONE_BIT_INVALID;
1148
1149         switch (info->channels) {
1150         case 8:
1151                 audio_cfg |= HDMI_AUD_CFG_CH78_VALID;
1152         case 6:
1153                 audio_cfg |= HDMI_AUD_CFG_CH56_VALID;
1154         case 4:
1155                 audio_cfg |= HDMI_AUD_CFG_CH34_VALID | HDMI_AUD_CFG_8CH;
1156         case 2:
1157                 audio_cfg |= HDMI_AUD_CFG_CH12_VALID;
1158                 break;
1159         default:
1160                 DRM_ERROR("ERROR: Unsupported number of channels (%d)!\n",
1161                           info->channels);
1162                 return -EINVAL;
1163         }
1164
1165         hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
1166
1167         hdmi->audio = *params;
1168
1169         return hdmi_audio_infoframe_config(hdmi);
1170 }
1171
1172 static void hdmi_audio_shutdown(struct device *dev, void *data)
1173 {
1174         struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1175         int audio_cfg;
1176
1177         DRM_DEBUG_DRIVER("\n");
1178
1179         /* disable audio */
1180         audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
1181                     HDMI_AUD_CFG_ONE_BIT_INVALID;
1182         hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
1183
1184         hdmi->audio.enabled = false;
1185         hdmi_audio_infoframe_config(hdmi);
1186 }
1187
1188 static int hdmi_audio_hw_params(struct device *dev,
1189                                 void *data,
1190                                 struct hdmi_codec_daifmt *daifmt,
1191                                 struct hdmi_codec_params *params)
1192 {
1193         struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1194         int ret;
1195         struct hdmi_audio_params audio = {
1196                 .sample_width = params->sample_width,
1197                 .sample_rate = params->sample_rate,
1198                 .cea = params->cea,
1199         };
1200
1201         DRM_DEBUG_DRIVER("\n");
1202
1203         if (!hdmi->enabled)
1204                 return 0;
1205
1206         if ((daifmt->fmt != HDMI_I2S) || daifmt->bit_clk_inv ||
1207             daifmt->frame_clk_inv || daifmt->bit_clk_master ||
1208             daifmt->frame_clk_master) {
1209                 dev_err(dev, "%s: Bad flags %d %d %d %d\n", __func__,
1210                         daifmt->bit_clk_inv, daifmt->frame_clk_inv,
1211                         daifmt->bit_clk_master,
1212                         daifmt->frame_clk_master);
1213                 return -EINVAL;
1214         }
1215
1216         audio.enabled = true;
1217
1218         ret = hdmi_audio_configure(hdmi, &audio);
1219         if (ret < 0)
1220                 return ret;
1221
1222         return 0;
1223 }
1224
1225 static int hdmi_audio_digital_mute(struct device *dev, void *data, bool enable)
1226 {
1227         struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1228
1229         DRM_DEBUG_DRIVER("%s\n", enable ? "enable" : "disable");
1230
1231         if (enable)
1232                 hdmi_write(hdmi, HDMI_SAMPLE_FLAT_ALL, HDMI_SAMPLE_FLAT_MASK);
1233         else
1234                 hdmi_write(hdmi, HDMI_SAMPLE_FLAT_NO, HDMI_SAMPLE_FLAT_MASK);
1235
1236         return 0;
1237 }
1238
1239 static int hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size_t len)
1240 {
1241         struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1242         struct drm_connector *connector = hdmi->drm_connector;
1243
1244         DRM_DEBUG_DRIVER("\n");
1245         memcpy(buf, connector->eld, min(sizeof(connector->eld), len));
1246
1247         return 0;
1248 }
1249
1250 static const struct hdmi_codec_ops audio_codec_ops = {
1251         .hw_params = hdmi_audio_hw_params,
1252         .audio_shutdown = hdmi_audio_shutdown,
1253         .digital_mute = hdmi_audio_digital_mute,
1254         .get_eld = hdmi_audio_get_eld,
1255 };
1256
1257 static int sti_hdmi_register_audio_driver(struct device *dev,
1258                                           struct sti_hdmi *hdmi)
1259 {
1260         struct hdmi_codec_pdata codec_data = {
1261                 .ops = &audio_codec_ops,
1262                 .max_i2s_channels = 8,
1263                 .i2s = 1,
1264         };
1265
1266         DRM_DEBUG_DRIVER("\n");
1267
1268         hdmi->audio.enabled = false;
1269
1270         hdmi->audio_pdev = platform_device_register_data(
1271                 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
1272                 &codec_data, sizeof(codec_data));
1273
1274         if (IS_ERR(hdmi->audio_pdev))
1275                 return PTR_ERR(hdmi->audio_pdev);
1276
1277         DRM_INFO("%s Driver bound %s\n", HDMI_CODEC_DRV_NAME, dev_name(dev));
1278
1279         return 0;
1280 }
1281
1282 static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
1283 {
1284         struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1285         struct drm_device *drm_dev = data;
1286         struct drm_encoder *encoder;
1287         struct sti_hdmi_connector *connector;
1288         struct drm_connector *drm_connector;
1289         struct drm_bridge *bridge;
1290         int err;
1291
1292         /* Set the drm device handle */
1293         hdmi->drm_dev = drm_dev;
1294
1295         encoder = sti_hdmi_find_encoder(drm_dev);
1296         if (!encoder)
1297                 return -EINVAL;
1298
1299         connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL);
1300         if (!connector)
1301                 return -EINVAL;
1302
1303         connector->hdmi = hdmi;
1304
1305         bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL);
1306         if (!bridge)
1307                 return -EINVAL;
1308
1309         bridge->driver_private = hdmi;
1310         bridge->funcs = &sti_hdmi_bridge_funcs;
1311         drm_bridge_attach(drm_dev, bridge);
1312
1313         encoder->bridge = bridge;
1314         connector->encoder = encoder;
1315
1316         drm_connector = (struct drm_connector *)connector;
1317
1318         drm_connector->polled = DRM_CONNECTOR_POLL_HPD;
1319
1320         drm_connector_init(drm_dev, drm_connector,
1321                         &sti_hdmi_connector_funcs, DRM_MODE_CONNECTOR_HDMIA);
1322         drm_connector_helper_add(drm_connector,
1323                         &sti_hdmi_connector_helper_funcs);
1324
1325         /* initialise property */
1326         sti_hdmi_connector_init_property(drm_dev, drm_connector);
1327
1328         hdmi->drm_connector = drm_connector;
1329
1330         err = drm_mode_connector_attach_encoder(drm_connector, encoder);
1331         if (err) {
1332                 DRM_ERROR("Failed to attach a connector to a encoder\n");
1333                 goto err_sysfs;
1334         }
1335
1336         err = sti_hdmi_register_audio_driver(dev, hdmi);
1337         if (err) {
1338                 DRM_ERROR("Failed to attach an audio codec\n");
1339                 goto err_sysfs;
1340         }
1341
1342         /* Initialize audio infoframe */
1343         err = hdmi_audio_infoframe_init(&hdmi->audio.cea);
1344         if (err) {
1345                 DRM_ERROR("Failed to init audio infoframe\n");
1346                 goto err_sysfs;
1347         }
1348
1349         /* Enable default interrupts */
1350         hdmi_write(hdmi, HDMI_DEFAULT_INT, HDMI_INT_EN);
1351
1352         return 0;
1353
1354 err_sysfs:
1355         hdmi->drm_connector = NULL;
1356         return -EINVAL;
1357 }
1358
1359 static void sti_hdmi_unbind(struct device *dev,
1360                 struct device *master, void *data)
1361 {
1362         struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1363         struct drm_device *drm_dev = data;
1364
1365         hdmi_debugfs_exit(hdmi, drm_dev->primary);
1366 }
1367
1368 static const struct component_ops sti_hdmi_ops = {
1369         .bind = sti_hdmi_bind,
1370         .unbind = sti_hdmi_unbind,
1371 };
1372
1373 static const struct of_device_id hdmi_of_match[] = {
1374         {
1375                 .compatible = "st,stih407-hdmi",
1376                 .data = &tx3g4c28phy_ops,
1377         }, {
1378                 /* end node */
1379         }
1380 };
1381 MODULE_DEVICE_TABLE(of, hdmi_of_match);
1382
1383 static int sti_hdmi_probe(struct platform_device *pdev)
1384 {
1385         struct device *dev = &pdev->dev;
1386         struct sti_hdmi *hdmi;
1387         struct device_node *np = dev->of_node;
1388         struct resource *res;
1389         struct device_node *ddc;
1390         int ret;
1391
1392         DRM_INFO("%s\n", __func__);
1393
1394         hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
1395         if (!hdmi)
1396                 return -ENOMEM;
1397
1398         ddc = of_parse_phandle(pdev->dev.of_node, "ddc", 0);
1399         if (ddc) {
1400                 hdmi->ddc_adapt = of_get_i2c_adapter_by_node(ddc);
1401                 of_node_put(ddc);
1402                 if (!hdmi->ddc_adapt)
1403                         return -EPROBE_DEFER;
1404         }
1405
1406         hdmi->dev = pdev->dev;
1407
1408         /* Get resources */
1409         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hdmi-reg");
1410         if (!res) {
1411                 DRM_ERROR("Invalid hdmi resource\n");
1412                 ret = -ENOMEM;
1413                 goto release_adapter;
1414         }
1415         hdmi->regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
1416         if (!hdmi->regs) {
1417                 ret = -ENOMEM;
1418                 goto release_adapter;
1419         }
1420
1421         hdmi->phy_ops = (struct hdmi_phy_ops *)
1422                 of_match_node(hdmi_of_match, np)->data;
1423
1424         /* Get clock resources */
1425         hdmi->clk_pix = devm_clk_get(dev, "pix");
1426         if (IS_ERR(hdmi->clk_pix)) {
1427                 DRM_ERROR("Cannot get hdmi_pix clock\n");
1428                 ret = PTR_ERR(hdmi->clk_pix);
1429                 goto release_adapter;
1430         }
1431
1432         hdmi->clk_tmds = devm_clk_get(dev, "tmds");
1433         if (IS_ERR(hdmi->clk_tmds)) {
1434                 DRM_ERROR("Cannot get hdmi_tmds clock\n");
1435                 ret = PTR_ERR(hdmi->clk_tmds);
1436                 goto release_adapter;
1437         }
1438
1439         hdmi->clk_phy = devm_clk_get(dev, "phy");
1440         if (IS_ERR(hdmi->clk_phy)) {
1441                 DRM_ERROR("Cannot get hdmi_phy clock\n");
1442                 ret = PTR_ERR(hdmi->clk_phy);
1443                 goto release_adapter;
1444         }
1445
1446         hdmi->clk_audio = devm_clk_get(dev, "audio");
1447         if (IS_ERR(hdmi->clk_audio)) {
1448                 DRM_ERROR("Cannot get hdmi_audio clock\n");
1449                 ret = PTR_ERR(hdmi->clk_audio);
1450                 goto release_adapter;
1451         }
1452
1453         hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG;
1454
1455         init_waitqueue_head(&hdmi->wait_event);
1456
1457         hdmi->irq = platform_get_irq_byname(pdev, "irq");
1458
1459         ret = devm_request_threaded_irq(dev, hdmi->irq, hdmi_irq,
1460                         hdmi_irq_thread, IRQF_ONESHOT, dev_name(dev), hdmi);
1461         if (ret) {
1462                 DRM_ERROR("Failed to register HDMI interrupt\n");
1463                 goto release_adapter;
1464         }
1465
1466         hdmi->reset = devm_reset_control_get(dev, "hdmi");
1467         /* Take hdmi out of reset */
1468         if (!IS_ERR(hdmi->reset))
1469                 reset_control_deassert(hdmi->reset);
1470
1471         platform_set_drvdata(pdev, hdmi);
1472
1473         return component_add(&pdev->dev, &sti_hdmi_ops);
1474
1475  release_adapter:
1476         i2c_put_adapter(hdmi->ddc_adapt);
1477
1478         return ret;
1479 }
1480
1481 static int sti_hdmi_remove(struct platform_device *pdev)
1482 {
1483         struct sti_hdmi *hdmi = dev_get_drvdata(&pdev->dev);
1484
1485         i2c_put_adapter(hdmi->ddc_adapt);
1486         if (hdmi->audio_pdev)
1487                 platform_device_unregister(hdmi->audio_pdev);
1488         component_del(&pdev->dev, &sti_hdmi_ops);
1489
1490         return 0;
1491 }
1492
1493 struct platform_driver sti_hdmi_driver = {
1494         .driver = {
1495                 .name = "sti-hdmi",
1496                 .owner = THIS_MODULE,
1497                 .of_match_table = hdmi_of_match,
1498         },
1499         .probe = sti_hdmi_probe,
1500         .remove = sti_hdmi_remove,
1501 };
1502
1503 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
1504 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
1505 MODULE_LICENSE("GPL");