root/drivers/gpu/drm/nouveau/dispnv04/dfp.c

DEFINITIONS

1. is_fpc_off
2. nv04_dfp_get_bound_head
3. nv04_dfp_bind_head
4. nv04_dfp_disable
5. nv04_dfp_update_fp_control
6. get_tmds_slave
7. nv04_dfp_mode_fixup
8. nv04_dfp_prepare_sel_clk
9. nv04_dfp_prepare
10. nv04_dfp_mode_set
11. nv04_dfp_commit
12. nv04_dfp_update_backlight
13. is_powersaving_dpms
14. nv04_lvds_dpms
15. nv04_tmds_dpms
16. nv04_dfp_save
17. nv04_dfp_restore
18. nv04_dfp_destroy
19. nv04_tmds_slave_init
20. nv04_dfp_create

   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 #include <drm/drm_fourcc.h>
  29 
  30 #include "nouveau_drv.h"
  31 #include "nouveau_reg.h"
  32 #include "nouveau_encoder.h"
  33 #include "nouveau_connector.h"
  34 #include "nouveau_crtc.h"
  35 #include "hw.h"
  36 #include "nvreg.h"
  37 
  38 #include <drm/i2c/sil164.h>
  39 
  40 #include <subdev/i2c.h>
  41 
  42 #define FP_TG_CONTROL_ON  (NV_PRAMDAC_FP_TG_CONTROL_DISPEN_POS |        \
  43                            NV_PRAMDAC_FP_TG_CONTROL_HSYNC_POS |         \
  44                            NV_PRAMDAC_FP_TG_CONTROL_VSYNC_POS)
  45 #define FP_TG_CONTROL_OFF (NV_PRAMDAC_FP_TG_CONTROL_DISPEN_DISABLE |    \
  46                            NV_PRAMDAC_FP_TG_CONTROL_HSYNC_DISABLE |     \
  47                            NV_PRAMDAC_FP_TG_CONTROL_VSYNC_DISABLE)
  48 
  49 static inline bool is_fpc_off(uint32_t fpc)
  50 {
  51         return ((fpc & (FP_TG_CONTROL_ON | FP_TG_CONTROL_OFF)) ==
  52                         FP_TG_CONTROL_OFF);
  53 }
  54 
  55 int nv04_dfp_get_bound_head(struct drm_device *dev, struct dcb_output *dcbent)
  56 {
  57         /* special case of nv_read_tmds to find crtc associated with an output.
  58          * this does not give a correct answer for off-chip dvi, but there's no
  59          * use for such an answer anyway
  60          */
  61         int ramdac = (dcbent->or & DCB_OUTPUT_C) >> 2;
  62 
  63         NVWriteRAMDAC(dev, ramdac, NV_PRAMDAC_FP_TMDS_CONTROL,
  64         NV_PRAMDAC_FP_TMDS_CONTROL_WRITE_DISABLE | 0x4);
  65         return ((NVReadRAMDAC(dev, ramdac, NV_PRAMDAC_FP_TMDS_DATA) & 0x8) >> 3) ^ ramdac;
  66 }
  67 
  68 void nv04_dfp_bind_head(struct drm_device *dev, struct dcb_output *dcbent,
  69                         int head, bool dl)
  70 {
  71         /* The BIOS scripts don't do this for us, sadly
  72          * Luckily we do know the values ;-)
  73          *
  74          * head < 0 indicates we wish to force a setting with the overrideval
  75          * (for VT restore etc.)
  76          */
  77 
  78         int ramdac = (dcbent->or & DCB_OUTPUT_C) >> 2;
  79         uint8_t tmds04 = 0x80;
  80 
  81         if (head != ramdac)
  82                 tmds04 = 0x88;
  83 
  84         if (dcbent->type == DCB_OUTPUT_LVDS)
  85                 tmds04 |= 0x01;
  86 
  87         nv_write_tmds(dev, dcbent->or, 0, 0x04, tmds04);
  88 
  89         if (dl) /* dual link */
  90                 nv_write_tmds(dev, dcbent->or, 1, 0x04, tmds04 ^ 0x08);
  91 }
  92 
  93 void nv04_dfp_disable(struct drm_device *dev, int head)
  94 {
  95         struct nv04_crtc_reg *crtcstate = nv04_display(dev)->mode_reg.crtc_reg;
  96 
  97         if (NVReadRAMDAC(dev, head, NV_PRAMDAC_FP_TG_CONTROL) &
  98             FP_TG_CONTROL_ON) {
  99                 /* digital remnants must be cleaned before new crtc
 100                  * values programmed.  delay is time for the vga stuff
 101                  * to realise it's in control again
 102                  */
 103                 NVWriteRAMDAC(dev, head, NV_PRAMDAC_FP_TG_CONTROL,
 104                               FP_TG_CONTROL_OFF);
 105                 msleep(50);
 106         }
 107         /* don't inadvertently turn it on when state written later */
 108         crtcstate[head].fp_control = FP_TG_CONTROL_OFF;
 109         crtcstate[head].CRTC[NV_CIO_CRE_LCD__INDEX] &=
 110                 ~NV_CIO_CRE_LCD_ROUTE_MASK;
 111 }
 112 
 113 void nv04_dfp_update_fp_control(struct drm_encoder *encoder, int mode)
 114 {
 115         struct drm_device *dev = encoder->dev;
 116         struct drm_crtc *crtc;
 117         struct nouveau_crtc *nv_crtc;
 118         uint32_t *fpc;
 119 
 120         if (mode == DRM_MODE_DPMS_ON) {
 121                 nv_crtc = nouveau_crtc(encoder->crtc);
 122                 fpc = &nv04_display(dev)->mode_reg.crtc_reg[nv_crtc->index].fp_control;
 123 
 124                 if (is_fpc_off(*fpc)) {
 125                         /* using saved value is ok, as (is_digital && dpms_on &&
 126                          * fp_control==OFF) is (at present) *only* true when
 127                          * fpc's most recent change was by below "off" code
 128                          */
 129                         *fpc = nv_crtc->dpms_saved_fp_control;
 130                 }
 131 
 132                 nv_crtc->fp_users |= 1 << nouveau_encoder(encoder)->dcb->index;
 133                 NVWriteRAMDAC(dev, nv_crtc->index, NV_PRAMDAC_FP_TG_CONTROL, *fpc);
 134         } else {
 135                 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 136                         nv_crtc = nouveau_crtc(crtc);
 137                         fpc = &nv04_display(dev)->mode_reg.crtc_reg[nv_crtc->index].fp_control;
 138 
 139                         nv_crtc->fp_users &= ~(1 << nouveau_encoder(encoder)->dcb->index);
 140                         if (!is_fpc_off(*fpc) && !nv_crtc->fp_users) {
 141                                 nv_crtc->dpms_saved_fp_control = *fpc;
 142                                 /* cut the FP output */
 143                                 *fpc &= ~FP_TG_CONTROL_ON;
 144                                 *fpc |= FP_TG_CONTROL_OFF;
 145                                 NVWriteRAMDAC(dev, nv_crtc->index,
 146                                               NV_PRAMDAC_FP_TG_CONTROL, *fpc);
 147                         }
 148                 }
 149         }
 150 }
 151 
 152 static struct drm_encoder *get_tmds_slave(struct drm_encoder *encoder)
 153 {
 154         struct drm_device *dev = encoder->dev;
 155         struct dcb_output *dcb = nouveau_encoder(encoder)->dcb;
 156         struct drm_encoder *slave;
 157 
 158         if (dcb->type != DCB_OUTPUT_TMDS || dcb->location == DCB_LOC_ON_CHIP)
 159                 return NULL;
 160 
 161         /* Some BIOSes (e.g. the one in a Quadro FX1000) report several
 162          * TMDS transmitters at the same I2C address, in the same I2C
 163          * bus. This can still work because in that case one of them is
 164          * always hard-wired to a reasonable configuration using straps,
 165          * and the other one needs to be programmed.
 166          *
 167          * I don't think there's a way to know which is which, even the
 168          * blob programs the one exposed via I2C for *both* heads, so
 169          * let's do the same.
 170          */
 171         list_for_each_entry(slave, &dev->mode_config.encoder_list, head) {
 172                 struct dcb_output *slave_dcb = nouveau_encoder(slave)->dcb;
 173 
 174                 if (slave_dcb->type == DCB_OUTPUT_TMDS && get_slave_funcs(slave) &&
 175                     slave_dcb->tmdsconf.slave_addr == dcb->tmdsconf.slave_addr)
 176                         return slave;
 177         }
 178 
 179         return NULL;
 180 }
 181 
 182 static bool nv04_dfp_mode_fixup(struct drm_encoder *encoder,
 183                                 const struct drm_display_mode *mode,
 184                                 struct drm_display_mode *adjusted_mode)
 185 {
 186         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 187         struct nouveau_connector *nv_connector = nouveau_encoder_connector_get(nv_encoder);
 188 
 189         if (!nv_connector->native_mode ||
 190             nv_connector->scaling_mode == DRM_MODE_SCALE_NONE ||
 191             mode->hdisplay > nv_connector->native_mode->hdisplay ||
 192             mode->vdisplay > nv_connector->native_mode->vdisplay) {
 193                 nv_encoder->mode = *adjusted_mode;
 194 
 195         } else {
 196                 nv_encoder->mode = *nv_connector->native_mode;
 197                 adjusted_mode->clock = nv_connector->native_mode->clock;
 198         }
 199 
 200         return true;
 201 }
 202 
 203 static void nv04_dfp_prepare_sel_clk(struct drm_device *dev,
 204                                      struct nouveau_encoder *nv_encoder, int head)
 205 {
 206         struct nv04_mode_state *state = &nv04_display(dev)->mode_reg;
 207         uint32_t bits1618 = nv_encoder->dcb->or & DCB_OUTPUT_A ? 0x10000 : 0x40000;
 208 
 209         if (nv_encoder->dcb->location != DCB_LOC_ON_CHIP)
 210                 return;
 211 
 212         /* SEL_CLK is only used on the primary ramdac
 213          * It toggles spread spectrum PLL output and sets the bindings of PLLs
 214          * to heads on digital outputs
 215          */
 216         if (head)
 217                 state->sel_clk |= bits1618;
 218         else
 219                 state->sel_clk &= ~bits1618;
 220 
 221         /* nv30:
 222          *      bit 0           NVClk spread spectrum on/off
 223          *      bit 2           MemClk spread spectrum on/off
 224          *      bit 4           PixClk1 spread spectrum on/off toggle
 225          *      bit 6           PixClk2 spread spectrum on/off toggle
 226          *
 227          * nv40 (observations from bios behaviour and mmio traces):
 228          *      bits 4&6        as for nv30
 229          *      bits 5&7        head dependent as for bits 4&6, but do not appear with 4&6;
 230          *                      maybe a different spread mode
 231          *      bits 8&10       seen on dual-link dvi outputs, purpose unknown (set by POST scripts)
 232          *      The logic behind turning spread spectrum on/off in the first place,
 233          *      and which bit-pair to use, is unclear on nv40 (for earlier cards, the fp table
 234          *      entry has the necessary info)
 235          */
 236         if (nv_encoder->dcb->type == DCB_OUTPUT_LVDS && nv04_display(dev)->saved_reg.sel_clk & 0xf0) {
 237                 int shift = (nv04_display(dev)->saved_reg.sel_clk & 0x50) ? 0 : 1;
 238 
 239                 state->sel_clk &= ~0xf0;
 240                 state->sel_clk |= (head ? 0x40 : 0x10) << shift;
 241         }
 242 }
 243 
 244 static void nv04_dfp_prepare(struct drm_encoder *encoder)
 245 {
 246         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 247         const struct drm_encoder_helper_funcs *helper = encoder->helper_private;
 248         struct drm_device *dev = encoder->dev;
 249         int head = nouveau_crtc(encoder->crtc)->index;
 250         struct nv04_crtc_reg *crtcstate = nv04_display(dev)->mode_reg.crtc_reg;
 251         uint8_t *cr_lcd = &crtcstate[head].CRTC[NV_CIO_CRE_LCD__INDEX];
 252         uint8_t *cr_lcd_oth = &crtcstate[head ^ 1].CRTC[NV_CIO_CRE_LCD__INDEX];
 253 
 254         helper->dpms(encoder, DRM_MODE_DPMS_OFF);
 255 
 256         nv04_dfp_prepare_sel_clk(dev, nv_encoder, head);
 257 
 258         *cr_lcd = (*cr_lcd & ~NV_CIO_CRE_LCD_ROUTE_MASK) | 0x3;
 259 
 260         if (nv_two_heads(dev)) {
 261                 if (nv_encoder->dcb->location == DCB_LOC_ON_CHIP)
 262                         *cr_lcd |= head ? 0x0 : 0x8;
 263                 else {
 264                         *cr_lcd |= (nv_encoder->dcb->or << 4) & 0x30;
 265                         if (nv_encoder->dcb->type == DCB_OUTPUT_LVDS)
 266                                 *cr_lcd |= 0x30;
 267                         if ((*cr_lcd & 0x30) == (*cr_lcd_oth & 0x30)) {
 268                                 /* avoid being connected to both crtcs */
 269                                 *cr_lcd_oth &= ~0x30;
 270                                 NVWriteVgaCrtc(dev, head ^ 1,
 271                                                NV_CIO_CRE_LCD__INDEX,
 272                                                *cr_lcd_oth);
 273                         }
 274                 }
 275         }
 276 }
 277 
 278 
 279 static void nv04_dfp_mode_set(struct drm_encoder *encoder,
 280                               struct drm_display_mode *mode,
 281                               struct drm_display_mode *adjusted_mode)
 282 {
 283         struct drm_device *dev = encoder->dev;
 284         struct nvif_object *device = &nouveau_drm(dev)->client.device.object;
 285         struct nouveau_drm *drm = nouveau_drm(dev);
 286         struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
 287         struct nv04_crtc_reg *regp = &nv04_display(dev)->mode_reg.crtc_reg[nv_crtc->index];
 288         struct nv04_crtc_reg *savep = &nv04_display(dev)->saved_reg.crtc_reg[nv_crtc->index];
 289         struct nouveau_connector *nv_connector = nouveau_crtc_connector_get(nv_crtc);
 290         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 291         struct drm_display_mode *output_mode = &nv_encoder->mode;
 292         struct drm_connector *connector = &nv_connector->base;
 293         const struct drm_framebuffer *fb = encoder->crtc->primary->fb;
 294         uint32_t mode_ratio, panel_ratio;
 295 
 296         NV_DEBUG(drm, "Output mode on CRTC %d:\n", nv_crtc->index);
 297         drm_mode_debug_printmodeline(output_mode);
 298 
 299         /* Initialize the FP registers in this CRTC. */
 300         regp->fp_horiz_regs[FP_DISPLAY_END] = output_mode->hdisplay - 1;
 301         regp->fp_horiz_regs[FP_TOTAL] = output_mode->htotal - 1;
 302         if (!nv_gf4_disp_arch(dev) ||
 303             (output_mode->hsync_start - output_mode->hdisplay) >=
 304                                         drm->vbios.digital_min_front_porch)
 305                 regp->fp_horiz_regs[FP_CRTC] = output_mode->hdisplay;
 306         else
 307                 regp->fp_horiz_regs[FP_CRTC] = output_mode->hsync_start - drm->vbios.digital_min_front_porch - 1;
 308         regp->fp_horiz_regs[FP_SYNC_START] = output_mode->hsync_start - 1;
 309         regp->fp_horiz_regs[FP_SYNC_END] = output_mode->hsync_end - 1;
 310         regp->fp_horiz_regs[FP_VALID_START] = output_mode->hskew;
 311         regp->fp_horiz_regs[FP_VALID_END] = output_mode->hdisplay - 1;
 312 
 313         regp->fp_vert_regs[FP_DISPLAY_END] = output_mode->vdisplay - 1;
 314         regp->fp_vert_regs[FP_TOTAL] = output_mode->vtotal - 1;
 315         regp->fp_vert_regs[FP_CRTC] = output_mode->vtotal - 5 - 1;
 316         regp->fp_vert_regs[FP_SYNC_START] = output_mode->vsync_start - 1;
 317         regp->fp_vert_regs[FP_SYNC_END] = output_mode->vsync_end - 1;
 318         regp->fp_vert_regs[FP_VALID_START] = 0;
 319         regp->fp_vert_regs[FP_VALID_END] = output_mode->vdisplay - 1;
 320 
 321         /* bit26: a bit seen on some g7x, no as yet discernable purpose */
 322         regp->fp_control = NV_PRAMDAC_FP_TG_CONTROL_DISPEN_POS |
 323                            (savep->fp_control & (1 << 26 | NV_PRAMDAC_FP_TG_CONTROL_READ_PROG));
 324         /* Deal with vsync/hsync polarity */
 325         /* LVDS screens do set this, but modes with +ve syncs are very rare */
 326         if (output_mode->flags & DRM_MODE_FLAG_PVSYNC)
 327                 regp->fp_control |= NV_PRAMDAC_FP_TG_CONTROL_VSYNC_POS;
 328         if (output_mode->flags & DRM_MODE_FLAG_PHSYNC)
 329                 regp->fp_control |= NV_PRAMDAC_FP_TG_CONTROL_HSYNC_POS;
 330         /* panel scaling first, as native would get set otherwise */
 331         if (nv_connector->scaling_mode == DRM_MODE_SCALE_NONE ||
 332             nv_connector->scaling_mode == DRM_MODE_SCALE_CENTER)        /* panel handles it */
 333                 regp->fp_control |= NV_PRAMDAC_FP_TG_CONTROL_MODE_CENTER;
 334         else if (adjusted_mode->hdisplay == output_mode->hdisplay &&
 335                  adjusted_mode->vdisplay == output_mode->vdisplay) /* native mode */
 336                 regp->fp_control |= NV_PRAMDAC_FP_TG_CONTROL_MODE_NATIVE;
 337         else /* gpu needs to scale */
 338                 regp->fp_control |= NV_PRAMDAC_FP_TG_CONTROL_MODE_SCALE;
 339         if (nvif_rd32(device, NV_PEXTDEV_BOOT_0) & NV_PEXTDEV_BOOT_0_STRAP_FP_IFACE_12BIT)
 340                 regp->fp_control |= NV_PRAMDAC_FP_TG_CONTROL_WIDTH_12;
 341         if (nv_encoder->dcb->location != DCB_LOC_ON_CHIP &&
 342             output_mode->clock > 165000)
 343                 regp->fp_control |= (2 << 24);
 344         if (nv_encoder->dcb->type == DCB_OUTPUT_LVDS) {
 345                 bool duallink = false, dummy;
 346                 if (nv_connector->edid &&
 347                     nv_connector->type == DCB_CONNECTOR_LVDS_SPWG) {
 348                         duallink = (((u8 *)nv_connector->edid)[121] == 2);
 349                 } else {
 350                         nouveau_bios_parse_lvds_table(dev, output_mode->clock,
 351                                                       &duallink, &dummy);
 352                 }
 353 
 354                 if (duallink)
 355                         regp->fp_control |= (8 << 28);
 356         } else
 357         if (output_mode->clock > 165000)
 358                 regp->fp_control |= (8 << 28);
 359 
 360         regp->fp_debug_0 = NV_PRAMDAC_FP_DEBUG_0_YWEIGHT_ROUND |
 361                            NV_PRAMDAC_FP_DEBUG_0_XWEIGHT_ROUND |
 362                            NV_PRAMDAC_FP_DEBUG_0_YINTERP_BILINEAR |
 363                            NV_PRAMDAC_FP_DEBUG_0_XINTERP_BILINEAR |
 364                            NV_RAMDAC_FP_DEBUG_0_TMDS_ENABLED |
 365                            NV_PRAMDAC_FP_DEBUG_0_YSCALE_ENABLE |
 366                            NV_PRAMDAC_FP_DEBUG_0_XSCALE_ENABLE;
 367 
 368         /* We want automatic scaling */
 369         regp->fp_debug_1 = 0;
 370         /* This can override HTOTAL and VTOTAL */
 371         regp->fp_debug_2 = 0;
 372 
 373         /* Use 20.12 fixed point format to avoid floats */
 374         mode_ratio = (1 << 12) * adjusted_mode->hdisplay / adjusted_mode->vdisplay;
 375         panel_ratio = (1 << 12) * output_mode->hdisplay / output_mode->vdisplay;
 376         /* if ratios are equal, SCALE_ASPECT will automatically (and correctly)
 377          * get treated the same as SCALE_FULLSCREEN */
 378         if (nv_connector->scaling_mode == DRM_MODE_SCALE_ASPECT &&
 379             mode_ratio != panel_ratio) {
 380                 uint32_t diff, scale;
 381                 bool divide_by_2 = nv_gf4_disp_arch(dev);
 382 
 383                 if (mode_ratio < panel_ratio) {
 384                         /* vertical needs to expand to glass size (automatic)
 385                          * horizontal needs to be scaled at vertical scale factor
 386                          * to maintain aspect */
 387 
 388                         scale = (1 << 12) * adjusted_mode->vdisplay / output_mode->vdisplay;
 389                         regp->fp_debug_1 = NV_PRAMDAC_FP_DEBUG_1_XSCALE_TESTMODE_ENABLE |
 390                                            XLATE(scale, divide_by_2, NV_PRAMDAC_FP_DEBUG_1_XSCALE_VALUE);
 391 
 392                         /* restrict area of screen used, horizontally */
 393                         diff = output_mode->hdisplay -
 394                                output_mode->vdisplay * mode_ratio / (1 << 12);
 395                         regp->fp_horiz_regs[FP_VALID_START] += diff / 2;
 396                         regp->fp_horiz_regs[FP_VALID_END] -= diff / 2;
 397                 }
 398 
 399                 if (mode_ratio > panel_ratio) {
 400                         /* horizontal needs to expand to glass size (automatic)
 401                          * vertical needs to be scaled at horizontal scale factor
 402                          * to maintain aspect */
 403 
 404                         scale = (1 << 12) * adjusted_mode->hdisplay / output_mode->hdisplay;
 405                         regp->fp_debug_1 = NV_PRAMDAC_FP_DEBUG_1_YSCALE_TESTMODE_ENABLE |
 406                                            XLATE(scale, divide_by_2, NV_PRAMDAC_FP_DEBUG_1_YSCALE_VALUE);
 407 
 408                         /* restrict area of screen used, vertically */
 409                         diff = output_mode->vdisplay -
 410                                (1 << 12) * output_mode->hdisplay / mode_ratio;
 411                         regp->fp_vert_regs[FP_VALID_START] += diff / 2;
 412                         regp->fp_vert_regs[FP_VALID_END] -= diff / 2;
 413                 }
 414         }
 415 
 416         /* Output property. */
 417         if ((nv_connector->dithering_mode == DITHERING_MODE_ON) ||
 418             (nv_connector->dithering_mode == DITHERING_MODE_AUTO &&
 419              fb->format->depth > connector->display_info.bpc * 3)) {
 420                 if (drm->client.device.info.chipset == 0x11)
 421                         regp->dither = savep->dither | 0x00010000;
 422                 else {
 423                         int i;
 424                         regp->dither = savep->dither | 0x00000001;
 425                         for (i = 0; i < 3; i++) {
 426                                 regp->dither_regs[i] = 0xe4e4e4e4;
 427                                 regp->dither_regs[i + 3] = 0x44444444;
 428                         }
 429                 }
 430         } else {
 431                 if (drm->client.device.info.chipset != 0x11) {
 432                         /* reset them */
 433                         int i;
 434                         for (i = 0; i < 3; i++) {
 435                                 regp->dither_regs[i] = savep->dither_regs[i];
 436                                 regp->dither_regs[i + 3] = savep->dither_regs[i + 3];
 437                         }
 438                 }
 439                 regp->dither = savep->dither;
 440         }
 441 
 442         regp->fp_margin_color = 0;
 443 }
 444 
 445 static void nv04_dfp_commit(struct drm_encoder *encoder)
 446 {
 447         struct drm_device *dev = encoder->dev;
 448         struct nouveau_drm *drm = nouveau_drm(dev);
 449         const struct drm_encoder_helper_funcs *helper = encoder->helper_private;
 450         struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
 451         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 452         struct dcb_output *dcbe = nv_encoder->dcb;
 453         int head = nouveau_crtc(encoder->crtc)->index;
 454         struct drm_encoder *slave_encoder;
 455 
 456         if (dcbe->type == DCB_OUTPUT_TMDS)
 457                 run_tmds_table(dev, dcbe, head, nv_encoder->mode.clock);
 458         else if (dcbe->type == DCB_OUTPUT_LVDS)
 459                 call_lvds_script(dev, dcbe, head, LVDS_RESET, nv_encoder->mode.clock);
 460 
 461         /* update fp_control state for any changes made by scripts,
 462          * so correct value is written at DPMS on */
 463         nv04_display(dev)->mode_reg.crtc_reg[head].fp_control =
 464                 NVReadRAMDAC(dev, head, NV_PRAMDAC_FP_TG_CONTROL);
 465 
 466         /* This could use refinement for flatpanels, but it should work this way */
 467         if (drm->client.device.info.chipset < 0x44)
 468                 NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + nv04_dac_output_offset(encoder), 0xf0000000);
 469         else
 470                 NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + nv04_dac_output_offset(encoder), 0x00100000);
 471 
 472         /* Init external transmitters */
 473         slave_encoder = get_tmds_slave(encoder);
 474         if (slave_encoder)
 475                 get_slave_funcs(slave_encoder)->mode_set(
 476                         slave_encoder, &nv_encoder->mode, &nv_encoder->mode);
 477 
 478         helper->dpms(encoder, DRM_MODE_DPMS_ON);
 479 
 480         NV_DEBUG(drm, "Output %s is running on CRTC %d using output %c\n",
 481                  nouveau_encoder_connector_get(nv_encoder)->base.name,
 482                  nv_crtc->index, '@' + ffs(nv_encoder->dcb->or));
 483 }
 484 
 485 static void nv04_dfp_update_backlight(struct drm_encoder *encoder, int mode)
 486 {
 487 #ifdef __powerpc__
 488         struct drm_device *dev = encoder->dev;
 489         struct nvif_object *device = &nouveau_drm(dev)->client.device.object;
 490 
 491         /* BIOS scripts usually take care of the backlight, thanks
 492          * Apple for your consistency.
 493          */
 494         if (dev->pdev->device == 0x0174 || dev->pdev->device == 0x0179 ||
 495             dev->pdev->device == 0x0189 || dev->pdev->device == 0x0329) {
 496                 if (mode == DRM_MODE_DPMS_ON) {
 497                         nvif_mask(device, NV_PBUS_DEBUG_DUALHEAD_CTL, 1 << 31, 1 << 31);
 498                         nvif_mask(device, NV_PCRTC_GPIO_EXT, 3, 1);
 499                 } else {
 500                         nvif_mask(device, NV_PBUS_DEBUG_DUALHEAD_CTL, 1 << 31, 0);
 501                         nvif_mask(device, NV_PCRTC_GPIO_EXT, 3, 0);
 502                 }
 503         }
 504 #endif
 505 }
 506 
 507 static inline bool is_powersaving_dpms(int mode)
 508 {
 509         return mode != DRM_MODE_DPMS_ON && mode != NV_DPMS_CLEARED;
 510 }
 511 
 512 static void nv04_lvds_dpms(struct drm_encoder *encoder, int mode)
 513 {
 514         struct drm_device *dev = encoder->dev;
 515         struct drm_crtc *crtc = encoder->crtc;
 516         struct nouveau_drm *drm = nouveau_drm(dev);
 517         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 518         bool was_powersaving = is_powersaving_dpms(nv_encoder->last_dpms);
 519 
 520         if (nv_encoder->last_dpms == mode)
 521                 return;
 522         nv_encoder->last_dpms = mode;
 523 
 524         NV_DEBUG(drm, "Setting dpms mode %d on lvds encoder (output %d)\n",
 525                  mode, nv_encoder->dcb->index);
 526 
 527         if (was_powersaving && is_powersaving_dpms(mode))
 528                 return;
 529 
 530         if (nv_encoder->dcb->lvdsconf.use_power_scripts) {
 531                 /* when removing an output, crtc may not be set, but PANEL_OFF
 532                  * must still be run
 533                  */
 534                 int head = crtc ? nouveau_crtc(crtc)->index :
 535                            nv04_dfp_get_bound_head(dev, nv_encoder->dcb);
 536 
 537                 if (mode == DRM_MODE_DPMS_ON) {
 538                         call_lvds_script(dev, nv_encoder->dcb, head,
 539                                          LVDS_PANEL_ON, nv_encoder->mode.clock);
 540                 } else
 541                         /* pxclk of 0 is fine for PANEL_OFF, and for a
 542                          * disconnected LVDS encoder there is no native_mode
 543                          */
 544                         call_lvds_script(dev, nv_encoder->dcb, head,
 545                                          LVDS_PANEL_OFF, 0);
 546         }
 547 
 548         nv04_dfp_update_backlight(encoder, mode);
 549         nv04_dfp_update_fp_control(encoder, mode);
 550 
 551         if (mode == DRM_MODE_DPMS_ON)
 552                 nv04_dfp_prepare_sel_clk(dev, nv_encoder, nouveau_crtc(crtc)->index);
 553         else {
 554                 nv04_display(dev)->mode_reg.sel_clk = NVReadRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK);
 555                 nv04_display(dev)->mode_reg.sel_clk &= ~0xf0;
 556         }
 557         NVWriteRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK, nv04_display(dev)->mode_reg.sel_clk);
 558 }
 559 
 560 static void nv04_tmds_dpms(struct drm_encoder *encoder, int mode)
 561 {
 562         struct nouveau_drm *drm = nouveau_drm(encoder->dev);
 563         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 564 
 565         if (nv_encoder->last_dpms == mode)
 566                 return;
 567         nv_encoder->last_dpms = mode;
 568 
 569         NV_DEBUG(drm, "Setting dpms mode %d on tmds encoder (output %d)\n",
 570                  mode, nv_encoder->dcb->index);
 571 
 572         nv04_dfp_update_backlight(encoder, mode);
 573         nv04_dfp_update_fp_control(encoder, mode);
 574 }
 575 
 576 static void nv04_dfp_save(struct drm_encoder *encoder)
 577 {
 578         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 579         struct drm_device *dev = encoder->dev;
 580 
 581         if (nv_two_heads(dev))
 582                 nv_encoder->restore.head =
 583                         nv04_dfp_get_bound_head(dev, nv_encoder->dcb);
 584 }
 585 
 586 static void nv04_dfp_restore(struct drm_encoder *encoder)
 587 {
 588         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 589         struct drm_device *dev = encoder->dev;
 590         int head = nv_encoder->restore.head;
 591 
 592         if (nv_encoder->dcb->type == DCB_OUTPUT_LVDS) {
 593                 struct nouveau_connector *connector =
 594                         nouveau_encoder_connector_get(nv_encoder);
 595 
 596                 if (connector && connector->native_mode)
 597                         call_lvds_script(dev, nv_encoder->dcb, head,
 598                                          LVDS_PANEL_ON,
 599                                          connector->native_mode->clock);
 600 
 601         } else if (nv_encoder->dcb->type == DCB_OUTPUT_TMDS) {
 602                 int clock = nouveau_hw_pllvals_to_clk
 603                                         (&nv04_display(dev)->saved_reg.crtc_reg[head].pllvals);
 604 
 605                 run_tmds_table(dev, nv_encoder->dcb, head, clock);
 606         }
 607 
 608         nv_encoder->last_dpms = NV_DPMS_CLEARED;
 609 }
 610 
 611 static void nv04_dfp_destroy(struct drm_encoder *encoder)
 612 {
 613         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 614 
 615         if (get_slave_funcs(encoder))
 616                 get_slave_funcs(encoder)->destroy(encoder);
 617 
 618         drm_encoder_cleanup(encoder);
 619         kfree(nv_encoder);
 620 }
 621 
 622 static void nv04_tmds_slave_init(struct drm_encoder *encoder)
 623 {
 624         struct drm_device *dev = encoder->dev;
 625         struct dcb_output *dcb = nouveau_encoder(encoder)->dcb;
 626         struct nouveau_drm *drm = nouveau_drm(dev);
 627         struct nvkm_i2c *i2c = nvxx_i2c(&drm->client.device);
 628         struct nvkm_i2c_bus *bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_PRI);
 629         struct nvkm_i2c_bus_probe info[] = {
 630                 {
 631                     {
 632                         .type = "sil164",
 633                         .addr = (dcb->tmdsconf.slave_addr == 0x7 ? 0x3a : 0x38),
 634                         .platform_data = &(struct sil164_encoder_params) {
 635                             SIL164_INPUT_EDGE_RISING
 636                          }
 637                     }, 0
 638                 },
 639                 { }
 640         };
 641         int type;
 642 
 643         if (!nv_gf4_disp_arch(dev) || !bus || get_tmds_slave(encoder))
 644                 return;
 645 
 646         type = nvkm_i2c_bus_probe(bus, "TMDS transmitter", info, NULL, NULL);
 647         if (type < 0)
 648                 return;
 649 
 650         drm_i2c_encoder_init(dev, to_encoder_slave(encoder),
 651                              &bus->i2c, &info[type].dev);
 652 }
 653 
 654 static const struct drm_encoder_helper_funcs nv04_lvds_helper_funcs = {
 655         .dpms = nv04_lvds_dpms,
 656         .mode_fixup = nv04_dfp_mode_fixup,
 657         .prepare = nv04_dfp_prepare,
 658         .commit = nv04_dfp_commit,
 659         .mode_set = nv04_dfp_mode_set,
 660         .detect = NULL,
 661 };
 662 
 663 static const struct drm_encoder_helper_funcs nv04_tmds_helper_funcs = {
 664         .dpms = nv04_tmds_dpms,
 665         .mode_fixup = nv04_dfp_mode_fixup,
 666         .prepare = nv04_dfp_prepare,
 667         .commit = nv04_dfp_commit,
 668         .mode_set = nv04_dfp_mode_set,
 669         .detect = NULL,
 670 };
 671 
 672 static const struct drm_encoder_funcs nv04_dfp_funcs = {
 673         .destroy = nv04_dfp_destroy,
 674 };
 675 
 676 int
 677 nv04_dfp_create(struct drm_connector *connector, struct dcb_output *entry)
 678 {
 679         const struct drm_encoder_helper_funcs *helper;
 680         struct nouveau_encoder *nv_encoder = NULL;
 681         struct drm_encoder *encoder;
 682         int type;
 683 
 684         switch (entry->type) {
 685         case DCB_OUTPUT_TMDS:
 686                 type = DRM_MODE_ENCODER_TMDS;
 687                 helper = &nv04_tmds_helper_funcs;
 688                 break;
 689         case DCB_OUTPUT_LVDS:
 690                 type = DRM_MODE_ENCODER_LVDS;
 691                 helper = &nv04_lvds_helper_funcs;
 692                 break;
 693         default:
 694                 return -EINVAL;
 695         }
 696 
 697         nv_encoder = kzalloc(sizeof(*nv_encoder), GFP_KERNEL);
 698         if (!nv_encoder)
 699                 return -ENOMEM;
 700 
 701         nv_encoder->enc_save = nv04_dfp_save;
 702         nv_encoder->enc_restore = nv04_dfp_restore;
 703 
 704         encoder = to_drm_encoder(nv_encoder);
 705 
 706         nv_encoder->dcb = entry;
 707         nv_encoder->or = ffs(entry->or) - 1;
 708 
 709         drm_encoder_init(connector->dev, encoder, &nv04_dfp_funcs, type, NULL);
 710         drm_encoder_helper_add(encoder, helper);
 711 
 712         encoder->possible_crtcs = entry->heads;
 713         encoder->possible_clones = 0;
 714 
 715         if (entry->type == DCB_OUTPUT_TMDS &&
 716             entry->location != DCB_LOC_ON_CHIP)
 717                 nv04_tmds_slave_init(encoder);
 718 
 719         drm_connector_attach_encoder(connector, encoder);
 720         return 0;
 721 }