drivers/gpu/drm/nouveau/nv04_dac.c

   1 /*
   2  * Copyright 2003 NVIDIA, Corporation
   3  * Copyright 2006 Dave Airlie
   4  * Copyright 2007 Maarten Maathuis
   5  * Copyright 2007-2009 Stuart Bennett
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24  * DEALINGS IN THE SOFTWARE.
  25  */
  26
  27 #include "drmP.h"
  28 #include "drm_crtc_helper.h"
  29
  30 #include "nouveau_drv.h"
  31 #include "nouveau_encoder.h"
  32 #include "nouveau_connector.h"
  33 #include "nouveau_crtc.h"
  34 #include "nouveau_hw.h"
  35 #include "nvreg.h"
  36
  37 int nv04_dac_output_offset(struct drm_encoder *encoder)
  38 {
  39         struct dcb_entry *dcb = nouveau_encoder(encoder)->dcb;
  40         int offset = 0;
  41
  42         if (dcb->or & (8 | OUTPUT_C))
  43                 offset += 0x68;
  44         if (dcb->or & (8 | OUTPUT_B))
  45                 offset += 0x2000;
  46
  47         return offset;
  48 }
  49
  50 /*
  51  * arbitrary limit to number of sense oscillations tolerated in one sample
  52  * period (observed to be at least 13 in "nvidia")
  53  */
  54 #define MAX_HBLANK_OSC 20
  55
  56 /*
  57  * arbitrary limit to number of conflicting sample pairs to tolerate at a
  58  * voltage step (observed to be at least 5 in "nvidia")
  59  */
  60 #define MAX_SAMPLE_PAIRS 10
  61
  62 static int sample_load_twice(struct drm_device *dev, bool sense[2])
  63 {
  64         int i;
  65
  66         for (i = 0; i < 2; i++) {
  67                 bool sense_a, sense_b, sense_b_prime;
  68                 int j = 0;
  69
  70                 /*
  71                  * wait for bit 0 clear -- out of hblank -- (say reg value 0x4),
  72                  * then wait for transition 0x4->0x5->0x4: enter hblank, leave
  73                  * hblank again
  74                  * use a 10ms timeout (guards against crtc being inactive, in
  75                  * which case blank state would never change)
  76                  */
  77                 if (!nouveau_wait_until(dev, 10000000, NV_PRMCIO_INP0__COLOR,
  78                                         0x00000001, 0x00000000))
  79                         return -EBUSY;
  80                 if (!nouveau_wait_until(dev, 10000000, NV_PRMCIO_INP0__COLOR,
  81                                         0x00000001, 0x00000001))
  82                         return -EBUSY;
  83                 if (!nouveau_wait_until(dev, 10000000, NV_PRMCIO_INP0__COLOR,
  84                                         0x00000001, 0x00000000))
  85                         return -EBUSY;
  86
  87                 udelay(100);
  88                 /* when level triggers, sense is _LO_ */
  89                 sense_a = nv_rd08(dev, NV_PRMCIO_INP0) & 0x10;
  90
  91                 /* take another reading until it agrees with sense_a... */
  92                 do {
  93                         udelay(100);
  94                         sense_b = nv_rd08(dev, NV_PRMCIO_INP0) & 0x10;
  95                         if (sense_a != sense_b) {
  96                                 sense_b_prime =
  97                                         nv_rd08(dev, NV_PRMCIO_INP0) & 0x10;
  98                                 if (sense_b == sense_b_prime) {
  99                                         /* ... unless two consecutive subsequent
 100                                          * samples agree; sense_a is replaced */
 101                                         sense_a = sense_b;
 102                                         /* force mis-match so we loop */
 103                                         sense_b = !sense_a;
 104                                 }
 105                         }
 106                 } while ((sense_a != sense_b) && ++j < MAX_HBLANK_OSC);
 107
 108                 if (j == MAX_HBLANK_OSC)
 109                         /* with so much oscillation, default to sense:LO */
 110                         sense[i] = false;
 111                 else
 112                         sense[i] = sense_a;
 113         }
 114
 115         return 0;
 116 }
 117
 118 static enum drm_connector_status nv04_dac_detect(struct drm_encoder *encoder,
 119                                                  struct drm_connector *connector)
 120 {
 121         struct drm_device *dev = encoder->dev;
 122         uint8_t saved_seq1, saved_pi, saved_rpc1;
 123         uint8_t saved_palette0[3], saved_palette_mask;
 124         uint32_t saved_rtest_ctrl, saved_rgen_ctrl;
 125         int i;
 126         uint8_t blue;
 127         bool sense = true;
 128
 129         /*
 130          * for this detection to work, there needs to be a mode set up on the
 131          * CRTC.  this is presumed to be the case
 132          */
 133
 134         if (nv_two_heads(dev))
 135                 /* only implemented for head A for now */
 136                 NVSetOwner(dev, 0);
 137
 138         saved_seq1 = NVReadVgaSeq(dev, 0, NV_VIO_SR_CLOCK_INDEX);
 139         NVWriteVgaSeq(dev, 0, NV_VIO_SR_CLOCK_INDEX, saved_seq1 & ~0x20);
 140
 141         saved_rtest_ctrl = NVReadRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL);
 142         NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL,
 143                       saved_rtest_ctrl & ~NV_PRAMDAC_TEST_CONTROL_PWRDWN_DAC_OFF);
 144
 145         msleep(10);
 146
 147         saved_pi = NVReadVgaCrtc(dev, 0, NV_CIO_CRE_PIXEL_INDEX);
 148         NVWriteVgaCrtc(dev, 0, NV_CIO_CRE_PIXEL_INDEX,
 149                        saved_pi & ~(0x80 | MASK(NV_CIO_CRE_PIXEL_FORMAT)));
 150         saved_rpc1 = NVReadVgaCrtc(dev, 0, NV_CIO_CRE_RPC1_INDEX);
 151         NVWriteVgaCrtc(dev, 0, NV_CIO_CRE_RPC1_INDEX, saved_rpc1 & ~0xc0);
 152
 153         nv_wr08(dev, NV_PRMDIO_READ_MODE_ADDRESS, 0x0);
 154         for (i = 0; i < 3; i++)
 155                 saved_palette0[i] = nv_rd08(dev, NV_PRMDIO_PALETTE_DATA);
 156         saved_palette_mask = nv_rd08(dev, NV_PRMDIO_PIXEL_MASK);
 157         nv_wr08(dev, NV_PRMDIO_PIXEL_MASK, 0);
 158
 159         saved_rgen_ctrl = NVReadRAMDAC(dev, 0, NV_PRAMDAC_GENERAL_CONTROL);
 160         NVWriteRAMDAC(dev, 0, NV_PRAMDAC_GENERAL_CONTROL,
 161                       (saved_rgen_ctrl & ~(NV_PRAMDAC_GENERAL_CONTROL_BPC_8BITS |
 162                                            NV_PRAMDAC_GENERAL_CONTROL_TERMINATION_75OHM)) |
 163                       NV_PRAMDAC_GENERAL_CONTROL_PIXMIX_ON);
 164
 165         blue = 8;       /* start of test range */
 166
 167         do {
 168                 bool sense_pair[2];
 169
 170                 nv_wr08(dev, NV_PRMDIO_WRITE_MODE_ADDRESS, 0);
 171                 nv_wr08(dev, NV_PRMDIO_PALETTE_DATA, 0);
 172                 nv_wr08(dev, NV_PRMDIO_PALETTE_DATA, 0);
 173                 /* testing blue won't find monochrome monitors.  I don't care */
 174                 nv_wr08(dev, NV_PRMDIO_PALETTE_DATA, blue);
 175
 176                 i = 0;
 177                 /* take sample pairs until both samples in the pair agree */
 178                 do {
 179                         if (sample_load_twice(dev, sense_pair))
 180                                 goto out;
 181                 } while ((sense_pair[0] != sense_pair[1]) &&
 182                                                         ++i < MAX_SAMPLE_PAIRS);
 183
 184                 if (i == MAX_SAMPLE_PAIRS)
 185                         /* too much oscillation defaults to LO */
 186                         sense = false;
 187                 else
 188                         sense = sense_pair[0];
 189
 190         /*
 191          * if sense goes LO before blue ramps to 0x18, monitor is not connected.
 192          * ergo, if blue gets to 0x18, monitor must be connected
 193          */
 194         } while (++blue < 0x18 && sense);
 195
 196 out:
 197         nv_wr08(dev, NV_PRMDIO_PIXEL_MASK, saved_palette_mask);
 198         NVWriteRAMDAC(dev, 0, NV_PRAMDAC_GENERAL_CONTROL, saved_rgen_ctrl);
 199         nv_wr08(dev, NV_PRMDIO_WRITE_MODE_ADDRESS, 0);
 200         for (i = 0; i < 3; i++)
 201                 nv_wr08(dev, NV_PRMDIO_PALETTE_DATA, saved_palette0[i]);
 202         NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL, saved_rtest_ctrl);
 203         NVWriteVgaCrtc(dev, 0, NV_CIO_CRE_PIXEL_INDEX, saved_pi);
 204         NVWriteVgaCrtc(dev, 0, NV_CIO_CRE_RPC1_INDEX, saved_rpc1);
 205         NVWriteVgaSeq(dev, 0, NV_VIO_SR_CLOCK_INDEX, saved_seq1);
 206
 207         if (blue == 0x18) {
 208                 NV_TRACE(dev, "Load detected on head A\n");
 209                 return connector_status_connected;
 210         }
 211
 212         return connector_status_disconnected;
 213 }
 214
 215 enum drm_connector_status nv17_dac_detect(struct drm_encoder *encoder,
 216                                           struct drm_connector *connector)
 217 {
 218         struct drm_device *dev = encoder->dev;
 219         struct drm_nouveau_private *dev_priv = dev->dev_private;
 220         struct dcb_entry *dcb = nouveau_encoder(encoder)->dcb;
 221         uint32_t testval, regoffset = nv04_dac_output_offset(encoder);
 222         uint32_t saved_powerctrl_2 = 0, saved_powerctrl_4 = 0, saved_routput,
 223                 saved_rtest_ctrl, saved_gpio0, saved_gpio1, temp, routput;
 224         int head, present = 0;
 225
 226 #define RGB_TEST_DATA(r, g, b) (r << 0 | g << 10 | b << 20)
 227         if (dcb->type == OUTPUT_TV) {
 228                 testval = RGB_TEST_DATA(0xa0, 0xa0, 0xa0);
 229
 230                 if (dev_priv->vbios->tvdactestval)
 231                         testval = dev_priv->vbios->tvdactestval;
 232         } else {
 233                 testval = RGB_TEST_DATA(0x140, 0x140, 0x140); /* 0x94050140 */
 234
 235                 if (dev_priv->vbios->dactestval)
 236                         testval = dev_priv->vbios->dactestval;
 237         }
 238
 239         saved_rtest_ctrl = NVReadRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset);
 240         NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset,
 241                       saved_rtest_ctrl & ~NV_PRAMDAC_TEST_CONTROL_PWRDWN_DAC_OFF);
 242
 243         saved_powerctrl_2 = nvReadMC(dev, NV_PBUS_POWERCTRL_2);
 244
 245         nvWriteMC(dev, NV_PBUS_POWERCTRL_2, saved_powerctrl_2 & 0xd7ffffff);
 246         if (regoffset == 0x68) {
 247                 saved_powerctrl_4 = nvReadMC(dev, NV_PBUS_POWERCTRL_4);
 248                 nvWriteMC(dev, NV_PBUS_POWERCTRL_4, saved_powerctrl_4 & 0xffffffcf);
 249         }
 250
 251         saved_gpio1 = nv17_gpio_get(dev, DCB_GPIO_TVDAC1);
 252         saved_gpio0 = nv17_gpio_get(dev, DCB_GPIO_TVDAC0);
 253
 254         nv17_gpio_set(dev, DCB_GPIO_TVDAC1, dcb->type == OUTPUT_TV);
 255         nv17_gpio_set(dev, DCB_GPIO_TVDAC0, dcb->type == OUTPUT_TV);
 256
 257         msleep(4);
 258
 259         saved_routput = NVReadRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + regoffset);
 260         head = (saved_routput & 0x100) >> 8;
 261 #if 0
 262         /* if there's a spare crtc, using it will minimise flicker for the case
 263          * where the in-use crtc is in use by an off-chip tmds encoder */
 264         if (xf86_config->crtc[head]->enabled && !xf86_config->crtc[head ^ 1]->enabled)
 265                 head ^= 1;
 266 #endif
 267         /* nv driver and nv31 use 0xfffffeee, nv34 and 6600 use 0xfffffece */
 268         routput = (saved_routput & 0xfffffece) | head << 8;
 269
 270         if (dev_priv->card_type >= NV_40) {
 271                 if (dcb->type == OUTPUT_TV)
 272                         routput |= 0x1a << 16;
 273                 else
 274                         routput &= ~(0x1a << 16);
 275         }
 276
 277         NVWriteRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + regoffset, routput);
 278         msleep(1);
 279
 280         temp = NVReadRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + regoffset);
 281         NVWriteRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + regoffset, temp | 1);
 282
 283         NVWriteRAMDAC(dev, head, NV_PRAMDAC_TESTPOINT_DATA,
 284                       NV_PRAMDAC_TESTPOINT_DATA_NOTBLANK | testval);
 285         temp = NVReadRAMDAC(dev, head, NV_PRAMDAC_TEST_CONTROL);
 286         NVWriteRAMDAC(dev, head, NV_PRAMDAC_TEST_CONTROL,
 287                       temp | NV_PRAMDAC_TEST_CONTROL_TP_INS_EN_ASSERTED);
 288         msleep(5);
 289
 290         temp = NVReadRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset);
 291
 292         if (dcb->type == OUTPUT_TV)
 293                 present = (nv17_tv_detect(encoder, connector, temp)
 294                            == connector_status_connected);
 295         else
 296                 present = temp & NV_PRAMDAC_TEST_CONTROL_SENSEB_ALLHI;
 297
 298         temp = NVReadRAMDAC(dev, head, NV_PRAMDAC_TEST_CONTROL);
 299         NVWriteRAMDAC(dev, head, NV_PRAMDAC_TEST_CONTROL,
 300                       temp & ~NV_PRAMDAC_TEST_CONTROL_TP_INS_EN_ASSERTED);
 301         NVWriteRAMDAC(dev, head, NV_PRAMDAC_TESTPOINT_DATA, 0);
 302
 303         /* bios does something more complex for restoring, but I think this is good enough */
 304         NVWriteRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + regoffset, saved_routput);
 305         NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset, saved_rtest_ctrl);
 306         if (regoffset == 0x68)
 307                 nvWriteMC(dev, NV_PBUS_POWERCTRL_4, saved_powerctrl_4);
 308         nvWriteMC(dev, NV_PBUS_POWERCTRL_2, saved_powerctrl_2);
 309
 310         nv17_gpio_set(dev, DCB_GPIO_TVDAC1, saved_gpio1);
 311         nv17_gpio_set(dev, DCB_GPIO_TVDAC0, saved_gpio0);
 312
 313         if (present) {
 314                 NV_INFO(dev, "Load detected on output %c\n", '@' + ffs(dcb->or));
 315                 return connector_status_connected;
 316         }
 317
 318         return connector_status_disconnected;
 319 }
 320
 321
 322 static bool nv04_dac_mode_fixup(struct drm_encoder *encoder,
 323                                 struct drm_display_mode *mode,
 324                                 struct drm_display_mode *adjusted_mode)
 325 {
 326         return true;
 327 }
 328
 329 static void nv04_dac_prepare(struct drm_encoder *encoder)
 330 {
 331         struct drm_encoder_helper_funcs *helper = encoder->helper_private;
 332         struct drm_device *dev = encoder->dev;
 333         struct drm_nouveau_private *dev_priv = dev->dev_private;
 334         int head = nouveau_crtc(encoder->crtc)->index;
 335         struct nv04_crtc_reg *crtcstate = dev_priv->mode_reg.crtc_reg;
 336
 337         helper->dpms(encoder, DRM_MODE_DPMS_OFF);
 338
 339         nv04_dfp_disable(dev, head);
 340
 341         /* Some NV4x have unknown values (0x3f, 0x50, 0x54, 0x6b, 0x79, 0x7f)
 342          * at LCD__INDEX which we don't alter
 343          */
 344         if (!(crtcstate[head].CRTC[NV_CIO_CRE_LCD__INDEX] & 0x44))
 345                 crtcstate[head].CRTC[NV_CIO_CRE_LCD__INDEX] = 0;
 346 }
 347
 348
 349 static void nv04_dac_mode_set(struct drm_encoder *encoder,
 350                               struct drm_display_mode *mode,
 351                               struct drm_display_mode *adjusted_mode)
 352 {
 353         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 354         struct drm_device *dev = encoder->dev;
 355         struct drm_nouveau_private *dev_priv = dev->dev_private;
 356         int head = nouveau_crtc(encoder->crtc)->index;
 357
 358         NV_TRACE(dev, "%s called for encoder %d\n", __func__,
 359                       nv_encoder->dcb->index);
 360
 361         if (nv_gf4_disp_arch(dev)) {
 362                 struct drm_encoder *rebind;
 363                 uint32_t dac_offset = nv04_dac_output_offset(encoder);
 364                 uint32_t otherdac;
 365
 366                 /* bit 16-19 are bits that are set on some G70 cards,
 367                  * but don't seem to have much effect */
 368                 NVWriteRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + dac_offset,
 369                               head << 8 | NV_PRAMDAC_DACCLK_SEL_DACCLK);
 370                 /* force any other vga encoders to bind to the other crtc */
 371                 list_for_each_entry(rebind, &dev->mode_config.encoder_list, head) {
 372                         if (rebind == encoder
 373                             || nouveau_encoder(rebind)->dcb->type != OUTPUT_ANALOG)
 374                                 continue;
 375
 376                         dac_offset = nv04_dac_output_offset(rebind);
 377                         otherdac = NVReadRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + dac_offset);
 378                         NVWriteRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + dac_offset,
 379                                       (otherdac & ~0x0100) | (head ^ 1) << 8);
 380                 }
 381         }
 382
 383         /* This could use refinement for flatpanels, but it should work this way */
 384         if (dev_priv->chipset < 0x44)
 385                 NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + nv04_dac_output_offset(encoder), 0xf0000000);
 386         else
 387                 NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + nv04_dac_output_offset(encoder), 0x00100000);
 388 }
 389
 390 static void nv04_dac_commit(struct drm_encoder *encoder)
 391 {
 392         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 393         struct drm_device *dev = encoder->dev;
 394         struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
 395         struct drm_encoder_helper_funcs *helper = encoder->helper_private;
 396
 397         helper->dpms(encoder, DRM_MODE_DPMS_ON);
 398
 399         NV_INFO(dev, "Output %s is running on CRTC %d using output %c\n",
 400                 drm_get_connector_name(&nouveau_encoder_connector_get(nv_encoder)->base),
 401                 nv_crtc->index, '@' + ffs(nv_encoder->dcb->or));
 402 }
 403
 404 void nv04_dac_update_dacclk(struct drm_encoder *encoder, bool enable)
 405 {
 406         struct drm_device *dev = encoder->dev;
 407         struct drm_nouveau_private *dev_priv = dev->dev_private;
 408         struct dcb_entry *dcb = nouveau_encoder(encoder)->dcb;
 409
 410         if (nv_gf4_disp_arch(dev)) {
 411                 uint32_t *dac_users = &dev_priv->dac_users[ffs(dcb->or) - 1];
 412                 int dacclk_off = NV_PRAMDAC_DACCLK + nv04_dac_output_offset(encoder);
 413                 uint32_t dacclk = NVReadRAMDAC(dev, 0, dacclk_off);
 414
 415                 if (enable) {
 416                         *dac_users |= 1 << dcb->index;
 417                         NVWriteRAMDAC(dev, 0, dacclk_off, dacclk | NV_PRAMDAC_DACCLK_SEL_DACCLK);
 418
 419                 } else {
 420                         *dac_users &= ~(1 << dcb->index);
 421                         if (!*dac_users)
 422                                 NVWriteRAMDAC(dev, 0, dacclk_off,
 423                                         dacclk & ~NV_PRAMDAC_DACCLK_SEL_DACCLK);
 424                 }
 425         }
 426 }
 427
 428 static void nv04_dac_dpms(struct drm_encoder *encoder, int mode)
 429 {
 430         struct drm_device *dev = encoder->dev;
 431         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 432
 433         if (nv_encoder->last_dpms == mode)
 434                 return;
 435         nv_encoder->last_dpms = mode;
 436
 437         NV_INFO(dev, "Setting dpms mode %d on vga encoder (output %d)\n",
 438                      mode, nv_encoder->dcb->index);
 439
 440         nv04_dac_update_dacclk(encoder, mode == DRM_MODE_DPMS_ON);
 441 }
 442
 443 static void nv04_dac_save(struct drm_encoder *encoder)
 444 {
 445         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 446         struct drm_device *dev = encoder->dev;
 447
 448         if (nv_gf4_disp_arch(dev))
 449                 nv_encoder->restore.output = NVReadRAMDAC(dev, 0, NV_PRAMDAC_DACCLK +
 450                                                           nv04_dac_output_offset(encoder));
 451 }
 452
 453 static void nv04_dac_restore(struct drm_encoder *encoder)
 454 {
 455         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 456         struct drm_device *dev = encoder->dev;
 457
 458         if (nv_gf4_disp_arch(dev))
 459                 NVWriteRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + nv04_dac_output_offset(encoder),
 460                               nv_encoder->restore.output);
 461
 462         nv_encoder->last_dpms = NV_DPMS_CLEARED;
 463 }
 464
 465 static void nv04_dac_destroy(struct drm_encoder *encoder)
 466 {
 467         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 468
 469         NV_DEBUG(encoder->dev, "\n");
 470
 471         drm_encoder_cleanup(encoder);
 472         kfree(nv_encoder);
 473 }
 474
 475 static const struct drm_encoder_helper_funcs nv04_dac_helper_funcs = {
 476         .dpms = nv04_dac_dpms,
 477         .save = nv04_dac_save,
 478         .restore = nv04_dac_restore,
 479         .mode_fixup = nv04_dac_mode_fixup,
 480         .prepare = nv04_dac_prepare,
 481         .commit = nv04_dac_commit,
 482         .mode_set = nv04_dac_mode_set,
 483         .detect = nv04_dac_detect
 484 };
 485
 486 static const struct drm_encoder_helper_funcs nv17_dac_helper_funcs = {
 487         .dpms = nv04_dac_dpms,
 488         .save = nv04_dac_save,
 489         .restore = nv04_dac_restore,
 490         .mode_fixup = nv04_dac_mode_fixup,
 491         .prepare = nv04_dac_prepare,
 492         .commit = nv04_dac_commit,
 493         .mode_set = nv04_dac_mode_set,
 494         .detect = nv17_dac_detect
 495 };
 496
 497 static const struct drm_encoder_funcs nv04_dac_funcs = {
 498         .destroy = nv04_dac_destroy,
 499 };
 500
 501 int nv04_dac_create(struct drm_device *dev, struct dcb_entry *entry)
 502 {
 503         const struct drm_encoder_helper_funcs *helper;
 504         struct drm_encoder *encoder;
 505         struct nouveau_encoder *nv_encoder = NULL;
 506
 507         nv_encoder = kzalloc(sizeof(*nv_encoder), GFP_KERNEL);
 508         if (!nv_encoder)
 509                 return -ENOMEM;
 510
 511         encoder = to_drm_encoder(nv_encoder);
 512
 513         nv_encoder->dcb = entry;
 514         nv_encoder->or = ffs(entry->or) - 1;
 515
 516         if (nv_gf4_disp_arch(dev))
 517                 helper = &nv17_dac_helper_funcs;
 518         else
 519                 helper = &nv04_dac_helper_funcs;
 520
 521         drm_encoder_init(dev, encoder, &nv04_dac_funcs, DRM_MODE_ENCODER_DAC);
 522         drm_encoder_helper_add(encoder, helper);
 523
 524         encoder->possible_crtcs = entry->heads;
 525         encoder->possible_clones = 0;
 526
 527         return 0;
 528 }