LXR linux/drivers/gpu/drm/nouveau/dispnv04/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 <drm/drm_crtc_helper.h>
  28
  29#include "nouveau_drv.h"
  30#include "nouveau_encoder.h"
  31#include "nouveau_connector.h"
  32#include "nouveau_crtc.h"
  33#include "hw.h"
  34#include "nvreg.h"
  35
  36#include <subdev/bios/gpio.h>
  37#include <subdev/gpio.h>
  38
  39#include <nvif/timer.h>
  40
  41int nv04_dac_output_offset(struct drm_encoder *encoder)
  42{
  43        struct dcb_output *dcb = nouveau_encoder(encoder)->dcb;
  44        int offset = 0;
  45
  46        if (dcb->or & (8 | DCB_OUTPUT_C))
  47                offset += 0x68;
  48        if (dcb->or & (8 | DCB_OUTPUT_B))
  49                offset += 0x2000;
  50
  51        return offset;
  52}
  53
  54/*
  55 * arbitrary limit to number of sense oscillations tolerated in one sample
  56 * period (observed to be at least 13 in "nvidia")
  57 */
  58#define MAX_HBLANK_OSC 20
  59
  60/*
  61 * arbitrary limit to number of conflicting sample pairs to tolerate at a
  62 * voltage step (observed to be at least 5 in "nvidia")
  63 */
  64#define MAX_SAMPLE_PAIRS 10
  65
  66static int sample_load_twice(struct drm_device *dev, bool sense[2])
  67{
  68        struct nouveau_drm *drm = nouveau_drm(dev);
  69        struct nvif_object *device = &drm->client.device.object;
  70        int i;
  71
  72        for (i = 0; i < 2; i++) {
  73                bool sense_a, sense_b, sense_b_prime;
  74                int j = 0;
  75
  76                /*
  77                 * wait for bit 0 clear -- out of hblank -- (say reg value 0x4),
  78                 * then wait for transition 0x4->0x5->0x4: enter hblank, leave
  79                 * hblank again
  80                 * use a 10ms timeout (guards against crtc being inactive, in
  81                 * which case blank state would never change)
  82                 */
  83                if (nvif_msec(&drm->client.device, 10,
  84                        if (!(nvif_rd32(device, NV_PRMCIO_INP0__COLOR) & 1))
  85                                break;
  86                ) < 0)
  87                        return -EBUSY;
  88
  89                if (nvif_msec(&drm->client.device, 10,
  90                        if ( (nvif_rd32(device, NV_PRMCIO_INP0__COLOR) & 1))
  91                                break;
  92                ) < 0)
  93                        return -EBUSY;
  94
  95                if (nvif_msec(&drm->client.device, 10,
  96                        if (!(nvif_rd32(device, NV_PRMCIO_INP0__COLOR) & 1))
  97                                break;
  98                ) < 0)
  99                        return -EBUSY;
 100
 101                udelay(100);
 102                /* when level triggers, sense is _LO_ */
 103                sense_a = nvif_rd08(device, NV_PRMCIO_INP0) & 0x10;
 104
 105                /* take another reading until it agrees with sense_a... */
 106                do {
 107                        udelay(100);
 108                        sense_b = nvif_rd08(device, NV_PRMCIO_INP0) & 0x10;
 109                        if (sense_a != sense_b) {
 110                                sense_b_prime =
 111                                        nvif_rd08(device, NV_PRMCIO_INP0) & 0x10;
 112                                if (sense_b == sense_b_prime) {
 113                                        /* ... unless two consecutive subsequent
 114                                         * samples agree; sense_a is replaced */
 115                                        sense_a = sense_b;
 116                                        /* force mis-match so we loop */
 117                                        sense_b = !sense_a;
 118                                }
 119                        }
 120                } while ((sense_a != sense_b) && ++j < MAX_HBLANK_OSC);
 121
 122                if (j == MAX_HBLANK_OSC)
 123                        /* with so much oscillation, default to sense:LO */
 124                        sense[i] = false;
 125                else
 126                        sense[i] = sense_a;
 127        }
 128
 129        return 0;
 130}
 131
 132static enum drm_connector_status nv04_dac_detect(struct drm_encoder *encoder,
 133                                                 struct drm_connector *connector)
 134{
 135        struct drm_device *dev = encoder->dev;
 136        struct nvif_object *device = &nouveau_drm(dev)->client.device.object;
 137        struct nouveau_drm *drm = nouveau_drm(dev);
 138        uint8_t saved_seq1, saved_pi, saved_rpc1, saved_cr_mode;
 139        uint8_t saved_palette0[3], saved_palette_mask;
 140        uint32_t saved_rtest_ctrl, saved_rgen_ctrl;
 141        int i;
 142        uint8_t blue;
 143        bool sense = true;
 144
 145        /*
 146         * for this detection to work, there needs to be a mode set up on the
 147         * CRTC.  this is presumed to be the case
 148         */
 149
 150        if (nv_two_heads(dev))
 151                /* only implemented for head A for now */
 152                NVSetOwner(dev, 0);
 153
 154        saved_cr_mode = NVReadVgaCrtc(dev, 0, NV_CIO_CR_MODE_INDEX);
 155        NVWriteVgaCrtc(dev, 0, NV_CIO_CR_MODE_INDEX, saved_cr_mode | 0x80);
 156
 157        saved_seq1 = NVReadVgaSeq(dev, 0, NV_VIO_SR_CLOCK_INDEX);
 158        NVWriteVgaSeq(dev, 0, NV_VIO_SR_CLOCK_INDEX, saved_seq1 & ~0x20);
 159
 160        saved_rtest_ctrl = NVReadRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL);
 161        NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL,
 162                      saved_rtest_ctrl & ~NV_PRAMDAC_TEST_CONTROL_PWRDWN_DAC_OFF);
 163
 164        msleep(10);
 165
 166        saved_pi = NVReadVgaCrtc(dev, 0, NV_CIO_CRE_PIXEL_INDEX);
 167        NVWriteVgaCrtc(dev, 0, NV_CIO_CRE_PIXEL_INDEX,
 168                       saved_pi & ~(0x80 | MASK(NV_CIO_CRE_PIXEL_FORMAT)));
 169        saved_rpc1 = NVReadVgaCrtc(dev, 0, NV_CIO_CRE_RPC1_INDEX);
 170        NVWriteVgaCrtc(dev, 0, NV_CIO_CRE_RPC1_INDEX, saved_rpc1 & ~0xc0);
 171
 172        nvif_wr08(device, NV_PRMDIO_READ_MODE_ADDRESS, 0x0);
 173        for (i = 0; i < 3; i++)
 174                saved_palette0[i] = nvif_rd08(device, NV_PRMDIO_PALETTE_DATA);
 175        saved_palette_mask = nvif_rd08(device, NV_PRMDIO_PIXEL_MASK);
 176        nvif_wr08(device, NV_PRMDIO_PIXEL_MASK, 0);
 177
 178        saved_rgen_ctrl = NVReadRAMDAC(dev, 0, NV_PRAMDAC_GENERAL_CONTROL);
 179        NVWriteRAMDAC(dev, 0, NV_PRAMDAC_GENERAL_CONTROL,
 180                      (saved_rgen_ctrl & ~(NV_PRAMDAC_GENERAL_CONTROL_BPC_8BITS |
 181                                           NV_PRAMDAC_GENERAL_CONTROL_TERMINATION_75OHM)) |
 182                      NV_PRAMDAC_GENERAL_CONTROL_PIXMIX_ON);
 183
 184        blue = 8;       /* start of test range */
 185
 186        do {
 187                bool sense_pair[2];
 188
 189                nvif_wr08(device, NV_PRMDIO_WRITE_MODE_ADDRESS, 0);
 190                nvif_wr08(device, NV_PRMDIO_PALETTE_DATA, 0);
 191                nvif_wr08(device, NV_PRMDIO_PALETTE_DATA, 0);
 192                /* testing blue won't find monochrome monitors.  I don't care */
 193                nvif_wr08(device, NV_PRMDIO_PALETTE_DATA, blue);
 194
 195                i = 0;
 196                /* take sample pairs until both samples in the pair agree */
 197                do {
 198                        if (sample_load_twice(dev, sense_pair))
 199                                goto out;
 200                } while ((sense_pair[0] != sense_pair[1]) &&
 201                                                        ++i < MAX_SAMPLE_PAIRS);
 202
 203                if (i == MAX_SAMPLE_PAIRS)
 204                        /* too much oscillation defaults to LO */
 205                        sense = false;
 206                else
 207                        sense = sense_pair[0];
 208
 209        /*
 210         * if sense goes LO before blue ramps to 0x18, monitor is not connected.
 211         * ergo, if blue gets to 0x18, monitor must be connected
 212         */
 213        } while (++blue < 0x18 && sense);
 214
 215out:
 216        nvif_wr08(device, NV_PRMDIO_PIXEL_MASK, saved_palette_mask);
 217        NVWriteRAMDAC(dev, 0, NV_PRAMDAC_GENERAL_CONTROL, saved_rgen_ctrl);
 218        nvif_wr08(device, NV_PRMDIO_WRITE_MODE_ADDRESS, 0);
 219        for (i = 0; i < 3; i++)
 220                nvif_wr08(device, NV_PRMDIO_PALETTE_DATA, saved_palette0[i]);
 221        NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL, saved_rtest_ctrl);
 222        NVWriteVgaCrtc(dev, 0, NV_CIO_CRE_PIXEL_INDEX, saved_pi);
 223        NVWriteVgaCrtc(dev, 0, NV_CIO_CRE_RPC1_INDEX, saved_rpc1);
 224        NVWriteVgaSeq(dev, 0, NV_VIO_SR_CLOCK_INDEX, saved_seq1);
 225        NVWriteVgaCrtc(dev, 0, NV_CIO_CR_MODE_INDEX, saved_cr_mode);
 226
 227        if (blue == 0x18) {
 228                NV_DEBUG(drm, "Load detected on head A\n");
 229                return connector_status_connected;
 230        }
 231
 232        return connector_status_disconnected;
 233}
 234
 235uint32_t nv17_dac_sample_load(struct drm_encoder *encoder)
 236{
 237        struct drm_device *dev = encoder->dev;
 238        struct nouveau_drm *drm = nouveau_drm(dev);
 239        struct nvif_object *device = &nouveau_drm(dev)->client.device.object;
 240        struct nvkm_gpio *gpio = nvxx_gpio(&drm->client.device);
 241        struct dcb_output *dcb = nouveau_encoder(encoder)->dcb;
 242        uint32_t sample, testval, regoffset = nv04_dac_output_offset(encoder);
 243        uint32_t saved_powerctrl_2 = 0, saved_powerctrl_4 = 0, saved_routput,
 244                saved_rtest_ctrl, saved_gpio0 = 0, saved_gpio1 = 0, temp, routput;
 245        int head;
 246
 247#define RGB_TEST_DATA(r, g, b) (r << 0 | g << 10 | b << 20)
 248        if (dcb->type == DCB_OUTPUT_TV) {
 249                testval = RGB_TEST_DATA(0xa0, 0xa0, 0xa0);
 250
 251                if (drm->vbios.tvdactestval)
 252                        testval = drm->vbios.tvdactestval;
 253        } else {
 254                testval = RGB_TEST_DATA(0x140, 0x140, 0x140); /* 0x94050140 */
 255
 256                if (drm->vbios.dactestval)
 257                        testval = drm->vbios.dactestval;
 258        }
 259
 260        saved_rtest_ctrl = NVReadRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset);
 261        NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset,
 262                      saved_rtest_ctrl & ~NV_PRAMDAC_TEST_CONTROL_PWRDWN_DAC_OFF);
 263
 264        saved_powerctrl_2 = nvif_rd32(device, NV_PBUS_POWERCTRL_2);
 265
 266        nvif_wr32(device, NV_PBUS_POWERCTRL_2, saved_powerctrl_2 & 0xd7ffffff);
 267        if (regoffset == 0x68) {
 268                saved_powerctrl_4 = nvif_rd32(device, NV_PBUS_POWERCTRL_4);
 269                nvif_wr32(device, NV_PBUS_POWERCTRL_4, saved_powerctrl_4 & 0xffffffcf);
 270        }
 271
 272        if (gpio) {
 273                saved_gpio1 = nvkm_gpio_get(gpio, 0, DCB_GPIO_TVDAC1, 0xff);
 274                saved_gpio0 = nvkm_gpio_get(gpio, 0, DCB_GPIO_TVDAC0, 0xff);
 275                nvkm_gpio_set(gpio, 0, DCB_GPIO_TVDAC1, 0xff, dcb->type == DCB_OUTPUT_TV);
 276                nvkm_gpio_set(gpio, 0, DCB_GPIO_TVDAC0, 0xff, dcb->type == DCB_OUTPUT_TV);
 277        }
 278
 279        msleep(4);
 280
 281        saved_routput = NVReadRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + regoffset);
 282        head = (saved_routput & 0x100) >> 8;
 283
 284        /* if there's a spare crtc, using it will minimise flicker */
 285        if (!(NVReadVgaCrtc(dev, head, NV_CIO_CRE_RPC1_INDEX) & 0xC0))
 286                head ^= 1;
 287
 288        /* nv driver and nv31 use 0xfffffeee, nv34 and 6600 use 0xfffffece */
 289        routput = (saved_routput & 0xfffffece) | head << 8;
 290
 291        if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_CURIE) {
 292                if (dcb->type == DCB_OUTPUT_TV)
 293                        routput |= 0x1a << 16;
 294                else
 295                        routput &= ~(0x1a << 16);
 296        }
 297
 298        NVWriteRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + regoffset, routput);
 299        msleep(1);
 300
 301        temp = NVReadRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + regoffset);
 302        NVWriteRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + regoffset, temp | 1);
 303
 304        NVWriteRAMDAC(dev, head, NV_PRAMDAC_TESTPOINT_DATA,
 305                      NV_PRAMDAC_TESTPOINT_DATA_NOTBLANK | testval);
 306        temp = NVReadRAMDAC(dev, head, NV_PRAMDAC_TEST_CONTROL);
 307        NVWriteRAMDAC(dev, head, NV_PRAMDAC_TEST_CONTROL,
 308                      temp | NV_PRAMDAC_TEST_CONTROL_TP_INS_EN_ASSERTED);
 309        msleep(5);
 310
 311        sample = NVReadRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset);
 312        /* do it again just in case it's a residual current */
 313        sample &= NVReadRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset);
 314
 315        temp = NVReadRAMDAC(dev, head, NV_PRAMDAC_TEST_CONTROL);
 316        NVWriteRAMDAC(dev, head, NV_PRAMDAC_TEST_CONTROL,
 317                      temp & ~NV_PRAMDAC_TEST_CONTROL_TP_INS_EN_ASSERTED);
 318        NVWriteRAMDAC(dev, head, NV_PRAMDAC_TESTPOINT_DATA, 0);
 319
 320        /* bios does something more complex for restoring, but I think this is good enough */
 321        NVWriteRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + regoffset, saved_routput);
 322        NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset, saved_rtest_ctrl);
 323        if (regoffset == 0x68)
 324                nvif_wr32(device, NV_PBUS_POWERCTRL_4, saved_powerctrl_4);
 325        nvif_wr32(device, NV_PBUS_POWERCTRL_2, saved_powerctrl_2);
 326
 327        if (gpio) {
 328                nvkm_gpio_set(gpio, 0, DCB_GPIO_TVDAC1, 0xff, saved_gpio1);
 329                nvkm_gpio_set(gpio, 0, DCB_GPIO_TVDAC0, 0xff, saved_gpio0);
 330        }
 331
 332        return sample;
 333}
 334
 335static enum drm_connector_status
 336nv17_dac_detect(struct drm_encoder *encoder, struct drm_connector *connector)
 337{
 338        struct nouveau_drm *drm = nouveau_drm(encoder->dev);
 339        struct dcb_output *dcb = nouveau_encoder(encoder)->dcb;
 340
 341        if (nv04_dac_in_use(encoder))
 342                return connector_status_disconnected;
 343
 344        if (nv17_dac_sample_load(encoder) &
 345            NV_PRAMDAC_TEST_CONTROL_SENSEB_ALLHI) {
 346                NV_DEBUG(drm, "Load detected on output %c\n",
 347                         '@' + ffs(dcb->or));
 348                return connector_status_connected;
 349        } else {
 350                return connector_status_disconnected;
 351        }
 352}
 353
 354static bool nv04_dac_mode_fixup(struct drm_encoder *encoder,
 355                                const struct drm_display_mode *mode,
 356                                struct drm_display_mode *adjusted_mode)
 357{
 358        if (nv04_dac_in_use(encoder))
 359                return false;
 360
 361        return true;
 362}
 363
 364static void nv04_dac_prepare(struct drm_encoder *encoder)
 365{
 366        const struct drm_encoder_helper_funcs *helper = encoder->helper_private;
 367        struct drm_device *dev = encoder->dev;
 368        int head = nouveau_crtc(encoder->crtc)->index;
 369
 370        helper->dpms(encoder, DRM_MODE_DPMS_OFF);
 371
 372        nv04_dfp_disable(dev, head);
 373}
 374
 375static void nv04_dac_mode_set(struct drm_encoder *encoder,
 376                              struct drm_display_mode *mode,
 377                              struct drm_display_mode *adjusted_mode)
 378{
 379        struct drm_device *dev = encoder->dev;
 380        struct nouveau_drm *drm = nouveau_drm(dev);
 381        int head = nouveau_crtc(encoder->crtc)->index;
 382
 383        if (nv_gf4_disp_arch(dev)) {
 384                struct drm_encoder *rebind;
 385                uint32_t dac_offset = nv04_dac_output_offset(encoder);
 386                uint32_t otherdac;
 387
 388                /* bit 16-19 are bits that are set on some G70 cards,
 389                 * but don't seem to have much effect */
 390                NVWriteRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + dac_offset,
 391                              head << 8 | NV_PRAMDAC_DACCLK_SEL_DACCLK);
 392                /* force any other vga encoders to bind to the other crtc */
 393                list_for_each_entry(rebind, &dev->mode_config.encoder_list, head) {
 394                        if (rebind == encoder
 395                            || nouveau_encoder(rebind)->dcb->type != DCB_OUTPUT_ANALOG)
 396                                continue;
 397
 398                        dac_offset = nv04_dac_output_offset(rebind);
 399                        otherdac = NVReadRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + dac_offset);
 400                        NVWriteRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + dac_offset,
 401                                      (otherdac & ~0x0100) | (head ^ 1) << 8);
 402                }
 403        }
 404
 405        /* This could use refinement for flatpanels, but it should work this way */
 406        if (drm->client.device.info.chipset < 0x44)
 407                NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + nv04_dac_output_offset(encoder), 0xf0000000);
 408        else
 409                NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + nv04_dac_output_offset(encoder), 0x00100000);
 410}
 411
 412static void nv04_dac_commit(struct drm_encoder *encoder)
 413{
 414        struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 415        struct nouveau_drm *drm = nouveau_drm(encoder->dev);
 416        struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
 417        const struct drm_encoder_helper_funcs *helper = encoder->helper_private;
 418
 419        helper->dpms(encoder, DRM_MODE_DPMS_ON);
 420
 421        NV_DEBUG(drm, "Output %s is running on CRTC %d using output %c\n",
 422                 nv04_encoder_get_connector(nv_encoder)->base.name,
 423                 nv_crtc->index, '@' + ffs(nv_encoder->dcb->or));
 424}
 425
 426void nv04_dac_update_dacclk(struct drm_encoder *encoder, bool enable)
 427{
 428        struct drm_device *dev = encoder->dev;
 429        struct dcb_output *dcb = nouveau_encoder(encoder)->dcb;
 430
 431        if (nv_gf4_disp_arch(dev)) {
 432                uint32_t *dac_users = &nv04_display(dev)->dac_users[ffs(dcb->or) - 1];
 433                int dacclk_off = NV_PRAMDAC_DACCLK + nv04_dac_output_offset(encoder);
 434                uint32_t dacclk = NVReadRAMDAC(dev, 0, dacclk_off);
 435
 436                if (enable) {
 437                        *dac_users |= 1 << dcb->index;
 438                        NVWriteRAMDAC(dev, 0, dacclk_off, dacclk | NV_PRAMDAC_DACCLK_SEL_DACCLK);
 439
 440                } else {
 441                        *dac_users &= ~(1 << dcb->index);
 442                        if (!*dac_users)
 443                                NVWriteRAMDAC(dev, 0, dacclk_off,
 444                                        dacclk & ~NV_PRAMDAC_DACCLK_SEL_DACCLK);
 445                }
 446        }
 447}
 448
 449/* Check if the DAC corresponding to 'encoder' is being used by
 450 * someone else. */
 451bool nv04_dac_in_use(struct drm_encoder *encoder)
 452{
 453        struct drm_device *dev = encoder->dev;
 454        struct dcb_output *dcb = nouveau_encoder(encoder)->dcb;
 455
 456        return nv_gf4_disp_arch(encoder->dev) &&
 457                (nv04_display(dev)->dac_users[ffs(dcb->or) - 1] & ~(1 << dcb->index));
 458}
 459
 460static void nv04_dac_dpms(struct drm_encoder *encoder, int mode)
 461{
 462        struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 463        struct nouveau_drm *drm = nouveau_drm(encoder->dev);
 464
 465        if (nv_encoder->last_dpms == mode)
 466                return;
 467        nv_encoder->last_dpms = mode;
 468
 469        NV_DEBUG(drm, "Setting dpms mode %d on vga encoder (output %d)\n",
 470                 mode, nv_encoder->dcb->index);
 471
 472        nv04_dac_update_dacclk(encoder, mode == DRM_MODE_DPMS_ON);
 473}
 474
 475static void nv04_dac_save(struct drm_encoder *encoder)
 476{
 477        struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 478        struct drm_device *dev = encoder->dev;
 479
 480        if (nv_gf4_disp_arch(dev))
 481                nv_encoder->restore.output = NVReadRAMDAC(dev, 0, NV_PRAMDAC_DACCLK +
 482                                                          nv04_dac_output_offset(encoder));
 483}
 484
 485static void nv04_dac_restore(struct drm_encoder *encoder)
 486{
 487        struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 488        struct drm_device *dev = encoder->dev;
 489
 490        if (nv_gf4_disp_arch(dev))
 491                NVWriteRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + nv04_dac_output_offset(encoder),
 492                              nv_encoder->restore.output);
 493
 494        nv_encoder->last_dpms = NV_DPMS_CLEARED;
 495}
 496
 497static void nv04_dac_destroy(struct drm_encoder *encoder)
 498{
 499        struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 500
 501        drm_encoder_cleanup(encoder);
 502        kfree(nv_encoder);
 503}
 504
 505static const struct drm_encoder_helper_funcs nv04_dac_helper_funcs = {
 506        .dpms = nv04_dac_dpms,
 507        .mode_fixup = nv04_dac_mode_fixup,
 508        .prepare = nv04_dac_prepare,
 509        .commit = nv04_dac_commit,
 510        .mode_set = nv04_dac_mode_set,
 511        .detect = nv04_dac_detect
 512};
 513
 514static const struct drm_encoder_helper_funcs nv17_dac_helper_funcs = {
 515        .dpms = nv04_dac_dpms,
 516        .mode_fixup = nv04_dac_mode_fixup,
 517        .prepare = nv04_dac_prepare,
 518        .commit = nv04_dac_commit,
 519        .mode_set = nv04_dac_mode_set,
 520        .detect = nv17_dac_detect
 521};
 522
 523static const struct drm_encoder_funcs nv04_dac_funcs = {
 524        .destroy = nv04_dac_destroy,
 525};
 526
 527int
 528nv04_dac_create(struct drm_connector *connector, struct dcb_output *entry)
 529{
 530        const struct drm_encoder_helper_funcs *helper;
 531        struct nouveau_encoder *nv_encoder = NULL;
 532        struct drm_device *dev = connector->dev;
 533        struct drm_encoder *encoder;
 534
 535        nv_encoder = kzalloc(sizeof(*nv_encoder), GFP_KERNEL);
 536        if (!nv_encoder)
 537                return -ENOMEM;
 538
 539        encoder = to_drm_encoder(nv_encoder);
 540
 541        nv_encoder->dcb = entry;
 542        nv_encoder->or = ffs(entry->or) - 1;
 543
 544        nv_encoder->enc_save = nv04_dac_save;
 545        nv_encoder->enc_restore = nv04_dac_restore;
 546
 547        if (nv_gf4_disp_arch(dev))
 548                helper = &nv17_dac_helper_funcs;
 549        else
 550                helper = &nv04_dac_helper_funcs;
 551
 552        drm_encoder_init(dev, encoder, &nv04_dac_funcs, DRM_MODE_ENCODER_DAC,
 553                         NULL);
 554        drm_encoder_helper_add(encoder, helper);
 555
 556        encoder->possible_crtcs = entry->heads;
 557        encoder->possible_clones = 0;
 558
 559        drm_connector_attach_encoder(connector, encoder);
 560        return 0;
 561}
 562