drivers/gpu/drm/i915/intel_overlay.c

   1 /*
   2  * Copyright © 2009
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  *
  23  * Authors:
  24  *    Daniel Vetter <daniel@ffwll.ch>
  25  *
  26  * Derived from Xorg ddx, xf86-video-intel, src/i830_video.c
  27  */
  28 #include <drm/drmP.h>
  29 #include <drm/i915_drm.h>
  30 #include "i915_drv.h"
  31 #include "i915_reg.h"
  32 #include "intel_drv.h"
  33 #include "intel_frontbuffer.h"
  34
  35 /* Limits for overlay size. According to intel doc, the real limits are:
  36  * Y width: 4095, UV width (planar): 2047, Y height: 2047,
  37  * UV width (planar): * 1023. But the xorg thinks 2048 for height and width. Use
  38  * the mininum of both.  */
  39 #define IMAGE_MAX_WIDTH         2048
  40 #define IMAGE_MAX_HEIGHT        2046 /* 2 * 1023 */
  41 /* on 830 and 845 these large limits result in the card hanging */
  42 #define IMAGE_MAX_WIDTH_LEGACY  1024
  43 #define IMAGE_MAX_HEIGHT_LEGACY 1088
  44
  45 /* overlay register definitions */
  46 /* OCMD register */
  47 #define OCMD_TILED_SURFACE      (0x1<<19)
  48 #define OCMD_MIRROR_MASK        (0x3<<17)
  49 #define OCMD_MIRROR_MODE        (0x3<<17)
  50 #define OCMD_MIRROR_HORIZONTAL  (0x1<<17)
  51 #define OCMD_MIRROR_VERTICAL    (0x2<<17)
  52 #define OCMD_MIRROR_BOTH        (0x3<<17)
  53 #define OCMD_BYTEORDER_MASK     (0x3<<14) /* zero for YUYV or FOURCC YUY2 */
  54 #define OCMD_UV_SWAP            (0x1<<14) /* YVYU */
  55 #define OCMD_Y_SWAP             (0x2<<14) /* UYVY or FOURCC UYVY */
  56 #define OCMD_Y_AND_UV_SWAP      (0x3<<14) /* VYUY */
  57 #define OCMD_SOURCE_FORMAT_MASK (0xf<<10)
  58 #define OCMD_RGB_888            (0x1<<10) /* not in i965 Intel docs */
  59 #define OCMD_RGB_555            (0x2<<10) /* not in i965 Intel docs */
  60 #define OCMD_RGB_565            (0x3<<10) /* not in i965 Intel docs */
  61 #define OCMD_YUV_422_PACKED     (0x8<<10)
  62 #define OCMD_YUV_411_PACKED     (0x9<<10) /* not in i965 Intel docs */
  63 #define OCMD_YUV_420_PLANAR     (0xc<<10)
  64 #define OCMD_YUV_422_PLANAR     (0xd<<10)
  65 #define OCMD_YUV_410_PLANAR     (0xe<<10) /* also 411 */
  66 #define OCMD_TVSYNCFLIP_PARITY  (0x1<<9)
  67 #define OCMD_TVSYNCFLIP_ENABLE  (0x1<<7)
  68 #define OCMD_BUF_TYPE_MASK      (0x1<<5)
  69 #define OCMD_BUF_TYPE_FRAME     (0x0<<5)
  70 #define OCMD_BUF_TYPE_FIELD     (0x1<<5)
  71 #define OCMD_TEST_MODE          (0x1<<4)
  72 #define OCMD_BUFFER_SELECT      (0x3<<2)
  73 #define OCMD_BUFFER0            (0x0<<2)
  74 #define OCMD_BUFFER1            (0x1<<2)
  75 #define OCMD_FIELD_SELECT       (0x1<<2)
  76 #define OCMD_FIELD0             (0x0<<1)
  77 #define OCMD_FIELD1             (0x1<<1)
  78 #define OCMD_ENABLE             (0x1<<0)
  79
  80 /* OCONFIG register */
  81 #define OCONF_PIPE_MASK         (0x1<<18)
  82 #define OCONF_PIPE_A            (0x0<<18)
  83 #define OCONF_PIPE_B            (0x1<<18)
  84 #define OCONF_GAMMA2_ENABLE     (0x1<<16)
  85 #define OCONF_CSC_MODE_BT601    (0x0<<5)
  86 #define OCONF_CSC_MODE_BT709    (0x1<<5)
  87 #define OCONF_CSC_BYPASS        (0x1<<4)
  88 #define OCONF_CC_OUT_8BIT       (0x1<<3)
  89 #define OCONF_TEST_MODE         (0x1<<2)
  90 #define OCONF_THREE_LINE_BUFFER (0x1<<0)
  91 #define OCONF_TWO_LINE_BUFFER   (0x0<<0)
  92
  93 /* DCLRKM (dst-key) register */
  94 #define DST_KEY_ENABLE          (0x1<<31)
  95 #define CLK_RGB24_MASK          0x0
  96 #define CLK_RGB16_MASK          0x070307
  97 #define CLK_RGB15_MASK          0x070707
  98 #define CLK_RGB8I_MASK          0xffffff
  99
 100 #define RGB16_TO_COLORKEY(c) \
 101         (((c & 0xF800) << 8) | ((c & 0x07E0) << 5) | ((c & 0x001F) << 3))
 102 #define RGB15_TO_COLORKEY(c) \
 103         (((c & 0x7c00) << 9) | ((c & 0x03E0) << 6) | ((c & 0x001F) << 3))
 104
 105 /* overlay flip addr flag */
 106 #define OFC_UPDATE              0x1
 107
 108 /* polyphase filter coefficients */
 109 #define N_HORIZ_Y_TAPS          5
 110 #define N_VERT_Y_TAPS           3
 111 #define N_HORIZ_UV_TAPS         3
 112 #define N_VERT_UV_TAPS          3
 113 #define N_PHASES                17
 114 #define MAX_TAPS                5
 115
 116 /* memory bufferd overlay registers */
 117 struct overlay_registers {
 118         u32 OBUF_0Y;
 119         u32 OBUF_1Y;
 120         u32 OBUF_0U;
 121         u32 OBUF_0V;
 122         u32 OBUF_1U;
 123         u32 OBUF_1V;
 124         u32 OSTRIDE;
 125         u32 YRGB_VPH;
 126         u32 UV_VPH;
 127         u32 HORZ_PH;
 128         u32 INIT_PHS;
 129         u32 DWINPOS;
 130         u32 DWINSZ;
 131         u32 SWIDTH;
 132         u32 SWIDTHSW;
 133         u32 SHEIGHT;
 134         u32 YRGBSCALE;
 135         u32 UVSCALE;
 136         u32 OCLRC0;
 137         u32 OCLRC1;
 138         u32 DCLRKV;
 139         u32 DCLRKM;
 140         u32 SCLRKVH;
 141         u32 SCLRKVL;
 142         u32 SCLRKEN;
 143         u32 OCONFIG;
 144         u32 OCMD;
 145         u32 RESERVED1; /* 0x6C */
 146         u32 OSTART_0Y;
 147         u32 OSTART_1Y;
 148         u32 OSTART_0U;
 149         u32 OSTART_0V;
 150         u32 OSTART_1U;
 151         u32 OSTART_1V;
 152         u32 OTILEOFF_0Y;
 153         u32 OTILEOFF_1Y;
 154         u32 OTILEOFF_0U;
 155         u32 OTILEOFF_0V;
 156         u32 OTILEOFF_1U;
 157         u32 OTILEOFF_1V;
 158         u32 FASTHSCALE; /* 0xA0 */
 159         u32 UVSCALEV; /* 0xA4 */
 160         u32 RESERVEDC[(0x200 - 0xA8) / 4]; /* 0xA8 - 0x1FC */
 161         u16 Y_VCOEFS[N_VERT_Y_TAPS * N_PHASES]; /* 0x200 */
 162         u16 RESERVEDD[0x100 / 2 - N_VERT_Y_TAPS * N_PHASES];
 163         u16 Y_HCOEFS[N_HORIZ_Y_TAPS * N_PHASES]; /* 0x300 */
 164         u16 RESERVEDE[0x200 / 2 - N_HORIZ_Y_TAPS * N_PHASES];
 165         u16 UV_VCOEFS[N_VERT_UV_TAPS * N_PHASES]; /* 0x500 */
 166         u16 RESERVEDF[0x100 / 2 - N_VERT_UV_TAPS * N_PHASES];
 167         u16 UV_HCOEFS[N_HORIZ_UV_TAPS * N_PHASES]; /* 0x600 */
 168         u16 RESERVEDG[0x100 / 2 - N_HORIZ_UV_TAPS * N_PHASES];
 169 };
 170
 171 struct intel_overlay {
 172         struct drm_i915_private *i915;
 173         struct intel_crtc *crtc;
 174         struct i915_vma *vma;
 175         struct i915_vma *old_vma;
 176         bool active;
 177         bool pfit_active;
 178         u32 pfit_vscale_ratio; /* shifted-point number, (1<<12) == 1.0 */
 179         u32 color_key:24;
 180         u32 color_key_enabled:1;
 181         u32 brightness, contrast, saturation;
 182         u32 old_xscale, old_yscale;
 183         /* register access */
 184         struct drm_i915_gem_object *reg_bo;
 185         struct overlay_registers __iomem *regs;
 186         u32 flip_addr;
 187         /* flip handling */
 188         struct i915_gem_active last_flip;
 189 };
 190
 191 static void i830_overlay_clock_gating(struct drm_i915_private *dev_priv,
 192                                       bool enable)
 193 {
 194         struct pci_dev *pdev = dev_priv->drm.pdev;
 195         u8 val;
 196
 197         /* WA_OVERLAY_CLKGATE:alm */
 198         if (enable)
 199                 I915_WRITE(DSPCLK_GATE_D, 0);
 200         else
 201                 I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE);
 202
 203         /* WA_DISABLE_L2CACHE_CLOCK_GATING:alm */
 204         pci_bus_read_config_byte(pdev->bus,
 205                                  PCI_DEVFN(0, 0), I830_CLOCK_GATE, &val);
 206         if (enable)
 207                 val &= ~I830_L2_CACHE_CLOCK_GATE_DISABLE;
 208         else
 209                 val |= I830_L2_CACHE_CLOCK_GATE_DISABLE;
 210         pci_bus_write_config_byte(pdev->bus,
 211                                   PCI_DEVFN(0, 0), I830_CLOCK_GATE, val);
 212 }
 213
 214 static void intel_overlay_submit_request(struct intel_overlay *overlay,
 215                                          struct i915_request *rq,
 216                                          i915_gem_retire_fn retire)
 217 {
 218         GEM_BUG_ON(i915_gem_active_peek(&overlay->last_flip,
 219                                         &overlay->i915->drm.struct_mutex));
 220         i915_gem_active_set_retire_fn(&overlay->last_flip, retire,
 221                                       &overlay->i915->drm.struct_mutex);
 222         i915_gem_active_set(&overlay->last_flip, rq);
 223         i915_request_add(rq);
 224 }
 225
 226 static int intel_overlay_do_wait_request(struct intel_overlay *overlay,
 227                                          struct i915_request *rq,
 228                                          i915_gem_retire_fn retire)
 229 {
 230         intel_overlay_submit_request(overlay, rq, retire);
 231         return i915_gem_active_retire(&overlay->last_flip,
 232                                       &overlay->i915->drm.struct_mutex);
 233 }
 234
 235 static struct i915_request *alloc_request(struct intel_overlay *overlay)
 236 {
 237         struct drm_i915_private *dev_priv = overlay->i915;
 238         struct intel_engine_cs *engine = dev_priv->engine[RCS];
 239
 240         return i915_request_alloc(engine, dev_priv->kernel_context);
 241 }
 242
 243 /* overlay needs to be disable in OCMD reg */
 244 static int intel_overlay_on(struct intel_overlay *overlay)
 245 {
 246         struct drm_i915_private *dev_priv = overlay->i915;
 247         struct i915_request *rq;
 248         u32 *cs;
 249
 250         WARN_ON(overlay->active);
 251
 252         rq = alloc_request(overlay);
 253         if (IS_ERR(rq))
 254                 return PTR_ERR(rq);
 255
 256         cs = intel_ring_begin(rq, 4);
 257         if (IS_ERR(cs)) {
 258                 i915_request_add(rq);
 259                 return PTR_ERR(cs);
 260         }
 261
 262         overlay->active = true;
 263
 264         if (IS_I830(dev_priv))
 265                 i830_overlay_clock_gating(dev_priv, false);
 266
 267         *cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_ON;
 268         *cs++ = overlay->flip_addr | OFC_UPDATE;
 269         *cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
 270         *cs++ = MI_NOOP;
 271         intel_ring_advance(rq, cs);
 272
 273         return intel_overlay_do_wait_request(overlay, rq, NULL);
 274 }
 275
 276 static void intel_overlay_flip_prepare(struct intel_overlay *overlay,
 277                                        struct i915_vma *vma)
 278 {
 279         enum pipe pipe = overlay->crtc->pipe;
 280
 281         WARN_ON(overlay->old_vma);
 282
 283         i915_gem_track_fb(overlay->vma ? overlay->vma->obj : NULL,
 284                           vma ? vma->obj : NULL,
 285                           INTEL_FRONTBUFFER_OVERLAY(pipe));
 286
 287         intel_frontbuffer_flip_prepare(overlay->i915,
 288                                        INTEL_FRONTBUFFER_OVERLAY(pipe));
 289
 290         overlay->old_vma = overlay->vma;
 291         if (vma)
 292                 overlay->vma = i915_vma_get(vma);
 293         else
 294                 overlay->vma = NULL;
 295 }
 296
 297 /* overlay needs to be enabled in OCMD reg */
 298 static int intel_overlay_continue(struct intel_overlay *overlay,
 299                                   struct i915_vma *vma,
 300                                   bool load_polyphase_filter)
 301 {
 302         struct drm_i915_private *dev_priv = overlay->i915;
 303         struct i915_request *rq;
 304         u32 flip_addr = overlay->flip_addr;
 305         u32 tmp, *cs;
 306
 307         WARN_ON(!overlay->active);
 308
 309         if (load_polyphase_filter)
 310                 flip_addr |= OFC_UPDATE;
 311
 312         /* check for underruns */
 313         tmp = I915_READ(DOVSTA);
 314         if (tmp & (1 << 17))
 315                 DRM_DEBUG("overlay underrun, DOVSTA: %x\n", tmp);
 316
 317         rq = alloc_request(overlay);
 318         if (IS_ERR(rq))
 319                 return PTR_ERR(rq);
 320
 321         cs = intel_ring_begin(rq, 2);
 322         if (IS_ERR(cs)) {
 323                 i915_request_add(rq);
 324                 return PTR_ERR(cs);
 325         }
 326
 327         *cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE;
 328         *cs++ = flip_addr;
 329         intel_ring_advance(rq, cs);
 330
 331         intel_overlay_flip_prepare(overlay, vma);
 332
 333         intel_overlay_submit_request(overlay, rq, NULL);
 334
 335         return 0;
 336 }
 337
 338 static void intel_overlay_release_old_vma(struct intel_overlay *overlay)
 339 {
 340         struct i915_vma *vma;
 341
 342         vma = fetch_and_zero(&overlay->old_vma);
 343         if (WARN_ON(!vma))
 344                 return;
 345
 346         intel_frontbuffer_flip_complete(overlay->i915,
 347                                         INTEL_FRONTBUFFER_OVERLAY(overlay->crtc->pipe));
 348
 349         i915_gem_object_unpin_from_display_plane(vma);
 350         i915_vma_put(vma);
 351 }
 352
 353 static void intel_overlay_release_old_vid_tail(struct i915_gem_active *active,
 354                                                struct i915_request *rq)
 355 {
 356         struct intel_overlay *overlay =
 357                 container_of(active, typeof(*overlay), last_flip);
 358
 359         intel_overlay_release_old_vma(overlay);
 360 }
 361
 362 static void intel_overlay_off_tail(struct i915_gem_active *active,
 363                                    struct i915_request *rq)
 364 {
 365         struct intel_overlay *overlay =
 366                 container_of(active, typeof(*overlay), last_flip);
 367         struct drm_i915_private *dev_priv = overlay->i915;
 368
 369         intel_overlay_release_old_vma(overlay);
 370
 371         overlay->crtc->overlay = NULL;
 372         overlay->crtc = NULL;
 373         overlay->active = false;
 374
 375         if (IS_I830(dev_priv))
 376                 i830_overlay_clock_gating(dev_priv, true);
 377 }
 378
 379 /* overlay needs to be disabled in OCMD reg */
 380 static int intel_overlay_off(struct intel_overlay *overlay)
 381 {
 382         struct i915_request *rq;
 383         u32 *cs, flip_addr = overlay->flip_addr;
 384
 385         WARN_ON(!overlay->active);
 386
 387         /* According to intel docs the overlay hw may hang (when switching
 388          * off) without loading the filter coeffs. It is however unclear whether
 389          * this applies to the disabling of the overlay or to the switching off
 390          * of the hw. Do it in both cases */
 391         flip_addr |= OFC_UPDATE;
 392
 393         rq = alloc_request(overlay);
 394         if (IS_ERR(rq))
 395                 return PTR_ERR(rq);
 396
 397         cs = intel_ring_begin(rq, 6);
 398         if (IS_ERR(cs)) {
 399                 i915_request_add(rq);
 400                 return PTR_ERR(cs);
 401         }
 402
 403         /* wait for overlay to go idle */
 404         *cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE;
 405         *cs++ = flip_addr;
 406         *cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
 407
 408         /* turn overlay off */
 409         *cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_OFF;
 410         *cs++ = flip_addr;
 411         *cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
 412
 413         intel_ring_advance(rq, cs);
 414
 415         intel_overlay_flip_prepare(overlay, NULL);
 416
 417         return intel_overlay_do_wait_request(overlay, rq,
 418                                              intel_overlay_off_tail);
 419 }
 420
 421 /* recover from an interruption due to a signal
 422  * We have to be careful not to repeat work forever an make forward progess. */
 423 static int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay)
 424 {
 425         return i915_gem_active_retire(&overlay->last_flip,
 426                                       &overlay->i915->drm.struct_mutex);
 427 }
 428
 429 /* Wait for pending overlay flip and release old frame.
 430  * Needs to be called before the overlay register are changed
 431  * via intel_overlay_(un)map_regs
 432  */
 433 static int intel_overlay_release_old_vid(struct intel_overlay *overlay)
 434 {
 435         struct drm_i915_private *dev_priv = overlay->i915;
 436         u32 *cs;
 437         int ret;
 438
 439         lockdep_assert_held(&dev_priv->drm.struct_mutex);
 440
 441         /* Only wait if there is actually an old frame to release to
 442          * guarantee forward progress.
 443          */
 444         if (!overlay->old_vma)
 445                 return 0;
 446
 447         if (I915_READ(ISR) & I915_OVERLAY_PLANE_FLIP_PENDING_INTERRUPT) {
 448                 /* synchronous slowpath */
 449                 struct i915_request *rq;
 450
 451                 rq = alloc_request(overlay);
 452                 if (IS_ERR(rq))
 453                         return PTR_ERR(rq);
 454
 455                 cs = intel_ring_begin(rq, 2);
 456                 if (IS_ERR(cs)) {
 457                         i915_request_add(rq);
 458                         return PTR_ERR(cs);
 459                 }
 460
 461                 *cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
 462                 *cs++ = MI_NOOP;
 463                 intel_ring_advance(rq, cs);
 464
 465                 ret = intel_overlay_do_wait_request(overlay, rq,
 466                                                     intel_overlay_release_old_vid_tail);
 467                 if (ret)
 468                         return ret;
 469         } else
 470                 intel_overlay_release_old_vid_tail(&overlay->last_flip, NULL);
 471
 472         return 0;
 473 }
 474
 475 void intel_overlay_reset(struct drm_i915_private *dev_priv)
 476 {
 477         struct intel_overlay *overlay = dev_priv->overlay;
 478
 479         if (!overlay)
 480                 return;
 481
 482         intel_overlay_release_old_vid(overlay);
 483
 484         overlay->old_xscale = 0;
 485         overlay->old_yscale = 0;
 486         overlay->crtc = NULL;
 487         overlay->active = false;
 488 }
 489
 490 struct put_image_params {
 491         int format;
 492         short dst_x;
 493         short dst_y;
 494         short dst_w;
 495         short dst_h;
 496         short src_w;
 497         short src_scan_h;
 498         short src_scan_w;
 499         short src_h;
 500         short stride_Y;
 501         short stride_UV;
 502         int offset_Y;
 503         int offset_U;
 504         int offset_V;
 505 };
 506
 507 static int packed_depth_bytes(u32 format)
 508 {
 509         switch (format & I915_OVERLAY_DEPTH_MASK) {
 510         case I915_OVERLAY_YUV422:
 511                 return 4;
 512         case I915_OVERLAY_YUV411:
 513                 /* return 6; not implemented */
 514         default:
 515                 return -EINVAL;
 516         }
 517 }
 518
 519 static int packed_width_bytes(u32 format, short width)
 520 {
 521         switch (format & I915_OVERLAY_DEPTH_MASK) {
 522         case I915_OVERLAY_YUV422:
 523                 return width << 1;
 524         default:
 525                 return -EINVAL;
 526         }
 527 }
 528
 529 static int uv_hsubsampling(u32 format)
 530 {
 531         switch (format & I915_OVERLAY_DEPTH_MASK) {
 532         case I915_OVERLAY_YUV422:
 533         case I915_OVERLAY_YUV420:
 534                 return 2;
 535         case I915_OVERLAY_YUV411:
 536         case I915_OVERLAY_YUV410:
 537                 return 4;
 538         default:
 539                 return -EINVAL;
 540         }
 541 }
 542
 543 static int uv_vsubsampling(u32 format)
 544 {
 545         switch (format & I915_OVERLAY_DEPTH_MASK) {
 546         case I915_OVERLAY_YUV420:
 547         case I915_OVERLAY_YUV410:
 548                 return 2;
 549         case I915_OVERLAY_YUV422:
 550         case I915_OVERLAY_YUV411:
 551                 return 1;
 552         default:
 553                 return -EINVAL;
 554         }
 555 }
 556
 557 static u32 calc_swidthsw(struct drm_i915_private *dev_priv, u32 offset, u32 width)
 558 {
 559         u32 sw;
 560
 561         if (IS_GEN2(dev_priv))
 562                 sw = ALIGN((offset & 31) + width, 32);
 563         else
 564                 sw = ALIGN((offset & 63) + width, 64);
 565
 566         if (sw == 0)
 567                 return 0;
 568
 569         return (sw - 32) >> 3;
 570 }
 571
 572 static const u16 y_static_hcoeffs[N_PHASES][N_HORIZ_Y_TAPS] = {
 573         [ 0] = { 0x3000, 0xb4a0, 0x1930, 0x1920, 0xb4a0, },
 574         [ 1] = { 0x3000, 0xb500, 0x19d0, 0x1880, 0xb440, },
 575         [ 2] = { 0x3000, 0xb540, 0x1a88, 0x2f80, 0xb3e0, },
 576         [ 3] = { 0x3000, 0xb580, 0x1b30, 0x2e20, 0xb380, },
 577         [ 4] = { 0x3000, 0xb5c0, 0x1bd8, 0x2cc0, 0xb320, },
 578         [ 5] = { 0x3020, 0xb5e0, 0x1c60, 0x2b80, 0xb2c0, },
 579         [ 6] = { 0x3020, 0xb5e0, 0x1cf8, 0x2a20, 0xb260, },
 580         [ 7] = { 0x3020, 0xb5e0, 0x1d80, 0x28e0, 0xb200, },
 581         [ 8] = { 0x3020, 0xb5c0, 0x1e08, 0x3f40, 0xb1c0, },
 582         [ 9] = { 0x3020, 0xb580, 0x1e78, 0x3ce0, 0xb160, },
 583         [10] = { 0x3040, 0xb520, 0x1ed8, 0x3aa0, 0xb120, },
 584         [11] = { 0x3040, 0xb4a0, 0x1f30, 0x3880, 0xb0e0, },
 585         [12] = { 0x3040, 0xb400, 0x1f78, 0x3680, 0xb0a0, },
 586         [13] = { 0x3020, 0xb340, 0x1fb8, 0x34a0, 0xb060, },
 587         [14] = { 0x3020, 0xb240, 0x1fe0, 0x32e0, 0xb040, },
 588         [15] = { 0x3020, 0xb140, 0x1ff8, 0x3160, 0xb020, },
 589         [16] = { 0xb000, 0x3000, 0x0800, 0x3000, 0xb000, },
 590 };
 591
 592 static const u16 uv_static_hcoeffs[N_PHASES][N_HORIZ_UV_TAPS] = {
 593         [ 0] = { 0x3000, 0x1800, 0x1800, },
 594         [ 1] = { 0xb000, 0x18d0, 0x2e60, },
 595         [ 2] = { 0xb000, 0x1990, 0x2ce0, },
 596         [ 3] = { 0xb020, 0x1a68, 0x2b40, },
 597         [ 4] = { 0xb040, 0x1b20, 0x29e0, },
 598         [ 5] = { 0xb060, 0x1bd8, 0x2880, },
 599         [ 6] = { 0xb080, 0x1c88, 0x3e60, },
 600         [ 7] = { 0xb0a0, 0x1d28, 0x3c00, },
 601         [ 8] = { 0xb0c0, 0x1db8, 0x39e0, },
 602         [ 9] = { 0xb0e0, 0x1e40, 0x37e0, },
 603         [10] = { 0xb100, 0x1eb8, 0x3620, },
 604         [11] = { 0xb100, 0x1f18, 0x34a0, },
 605         [12] = { 0xb100, 0x1f68, 0x3360, },
 606         [13] = { 0xb0e0, 0x1fa8, 0x3240, },
 607         [14] = { 0xb0c0, 0x1fe0, 0x3140, },
 608         [15] = { 0xb060, 0x1ff0, 0x30a0, },
 609         [16] = { 0x3000, 0x0800, 0x3000, },
 610 };
 611
 612 static void update_polyphase_filter(struct overlay_registers __iomem *regs)
 613 {
 614         memcpy_toio(regs->Y_HCOEFS, y_static_hcoeffs, sizeof(y_static_hcoeffs));
 615         memcpy_toio(regs->UV_HCOEFS, uv_static_hcoeffs,
 616                     sizeof(uv_static_hcoeffs));
 617 }
 618
 619 static bool update_scaling_factors(struct intel_overlay *overlay,
 620                                    struct overlay_registers __iomem *regs,
 621                                    struct put_image_params *params)
 622 {
 623         /* fixed point with a 12 bit shift */
 624         u32 xscale, yscale, xscale_UV, yscale_UV;
 625 #define FP_SHIFT 12
 626 #define FRACT_MASK 0xfff
 627         bool scale_changed = false;
 628         int uv_hscale = uv_hsubsampling(params->format);
 629         int uv_vscale = uv_vsubsampling(params->format);
 630
 631         if (params->dst_w > 1)
 632                 xscale = ((params->src_scan_w - 1) << FP_SHIFT)
 633                         /(params->dst_w);
 634         else
 635                 xscale = 1 << FP_SHIFT;
 636
 637         if (params->dst_h > 1)
 638                 yscale = ((params->src_scan_h - 1) << FP_SHIFT)
 639                         /(params->dst_h);
 640         else
 641                 yscale = 1 << FP_SHIFT;
 642
 643         /*if (params->format & I915_OVERLAY_YUV_PLANAR) {*/
 644         xscale_UV = xscale/uv_hscale;
 645         yscale_UV = yscale/uv_vscale;
 646         /* make the Y scale to UV scale ratio an exact multiply */
 647         xscale = xscale_UV * uv_hscale;
 648         yscale = yscale_UV * uv_vscale;
 649         /*} else {
 650           xscale_UV = 0;
 651           yscale_UV = 0;
 652           }*/
 653
 654         if (xscale != overlay->old_xscale || yscale != overlay->old_yscale)
 655                 scale_changed = true;
 656         overlay->old_xscale = xscale;
 657         overlay->old_yscale = yscale;
 658
 659         iowrite32(((yscale & FRACT_MASK) << 20) |
 660                   ((xscale >> FP_SHIFT)  << 16) |
 661                   ((xscale & FRACT_MASK) << 3),
 662                  &regs->YRGBSCALE);
 663
 664         iowrite32(((yscale_UV & FRACT_MASK) << 20) |
 665                   ((xscale_UV >> FP_SHIFT)  << 16) |
 666                   ((xscale_UV & FRACT_MASK) << 3),
 667                  &regs->UVSCALE);
 668
 669         iowrite32((((yscale    >> FP_SHIFT) << 16) |
 670                    ((yscale_UV >> FP_SHIFT) << 0)),
 671                  &regs->UVSCALEV);
 672
 673         if (scale_changed)
 674                 update_polyphase_filter(regs);
 675
 676         return scale_changed;
 677 }
 678
 679 static void update_colorkey(struct intel_overlay *overlay,
 680                             struct overlay_registers __iomem *regs)
 681 {
 682         const struct intel_plane_state *state =
 683                 to_intel_plane_state(overlay->crtc->base.primary->state);
 684         u32 key = overlay->color_key;
 685         u32 format = 0;
 686         u32 flags = 0;
 687
 688         if (overlay->color_key_enabled)
 689                 flags |= DST_KEY_ENABLE;
 690
 691         if (state->base.visible)
 692                 format = state->base.fb->format->format;
 693
 694         switch (format) {
 695         case DRM_FORMAT_C8:
 696                 key = 0;
 697                 flags |= CLK_RGB8I_MASK;
 698                 break;
 699         case DRM_FORMAT_XRGB1555:
 700                 key = RGB15_TO_COLORKEY(key);
 701                 flags |= CLK_RGB15_MASK;
 702                 break;
 703         case DRM_FORMAT_RGB565:
 704                 key = RGB16_TO_COLORKEY(key);
 705                 flags |= CLK_RGB16_MASK;
 706                 break;
 707         default:
 708                 flags |= CLK_RGB24_MASK;
 709                 break;
 710         }
 711
 712         iowrite32(key, &regs->DCLRKV);
 713         iowrite32(flags, &regs->DCLRKM);
 714 }
 715
 716 static u32 overlay_cmd_reg(struct put_image_params *params)
 717 {
 718         u32 cmd = OCMD_ENABLE | OCMD_BUF_TYPE_FRAME | OCMD_BUFFER0;
 719
 720         if (params->format & I915_OVERLAY_YUV_PLANAR) {
 721                 switch (params->format & I915_OVERLAY_DEPTH_MASK) {
 722                 case I915_OVERLAY_YUV422:
 723                         cmd |= OCMD_YUV_422_PLANAR;
 724                         break;
 725                 case I915_OVERLAY_YUV420:
 726                         cmd |= OCMD_YUV_420_PLANAR;
 727                         break;
 728                 case I915_OVERLAY_YUV411:
 729                 case I915_OVERLAY_YUV410:
 730                         cmd |= OCMD_YUV_410_PLANAR;
 731                         break;
 732                 }
 733         } else { /* YUV packed */
 734                 switch (params->format & I915_OVERLAY_DEPTH_MASK) {
 735                 case I915_OVERLAY_YUV422:
 736                         cmd |= OCMD_YUV_422_PACKED;
 737                         break;
 738                 case I915_OVERLAY_YUV411:
 739                         cmd |= OCMD_YUV_411_PACKED;
 740                         break;
 741                 }
 742
 743                 switch (params->format & I915_OVERLAY_SWAP_MASK) {
 744                 case I915_OVERLAY_NO_SWAP:
 745                         break;
 746                 case I915_OVERLAY_UV_SWAP:
 747                         cmd |= OCMD_UV_SWAP;
 748                         break;
 749                 case I915_OVERLAY_Y_SWAP:
 750                         cmd |= OCMD_Y_SWAP;
 751                         break;
 752                 case I915_OVERLAY_Y_AND_UV_SWAP:
 753                         cmd |= OCMD_Y_AND_UV_SWAP;
 754                         break;
 755                 }
 756         }
 757
 758         return cmd;
 759 }
 760
 761 static int intel_overlay_do_put_image(struct intel_overlay *overlay,
 762                                       struct drm_i915_gem_object *new_bo,
 763                                       struct put_image_params *params)
 764 {
 765         struct overlay_registers __iomem *regs = overlay->regs;
 766         struct drm_i915_private *dev_priv = overlay->i915;
 767         u32 swidth, swidthsw, sheight, ostride;
 768         enum pipe pipe = overlay->crtc->pipe;
 769         bool scale_changed = false;
 770         struct i915_vma *vma;
 771         int ret, tmp_width;
 772
 773         lockdep_assert_held(&dev_priv->drm.struct_mutex);
 774         WARN_ON(!drm_modeset_is_locked(&dev_priv->drm.mode_config.connection_mutex));
 775
 776         ret = intel_overlay_release_old_vid(overlay);
 777         if (ret != 0)
 778                 return ret;
 779
 780         atomic_inc(&dev_priv->gpu_error.pending_fb_pin);
 781
 782         vma = i915_gem_object_pin_to_display_plane(new_bo,
 783                                                    0, NULL, PIN_MAPPABLE);
 784         if (IS_ERR(vma)) {
 785                 ret = PTR_ERR(vma);
 786                 goto out_pin_section;
 787         }
 788         intel_fb_obj_flush(new_bo, ORIGIN_DIRTYFB);
 789
 790         ret = i915_vma_put_fence(vma);
 791         if (ret)
 792                 goto out_unpin;
 793
 794         if (!overlay->active) {
 795                 u32 oconfig;
 796
 797                 oconfig = OCONF_CC_OUT_8BIT;
 798                 if (IS_GEN4(dev_priv))
 799                         oconfig |= OCONF_CSC_MODE_BT709;
 800                 oconfig |= pipe == 0 ?
 801                         OCONF_PIPE_A : OCONF_PIPE_B;
 802                 iowrite32(oconfig, &regs->OCONFIG);
 803
 804                 ret = intel_overlay_on(overlay);
 805                 if (ret != 0)
 806                         goto out_unpin;
 807         }
 808
 809         iowrite32((params->dst_y << 16) | params->dst_x, &regs->DWINPOS);
 810         iowrite32((params->dst_h << 16) | params->dst_w, &regs->DWINSZ);
 811
 812         if (params->format & I915_OVERLAY_YUV_PACKED)
 813                 tmp_width = packed_width_bytes(params->format, params->src_w);
 814         else
 815                 tmp_width = params->src_w;
 816
 817         swidth = params->src_w;
 818         swidthsw = calc_swidthsw(dev_priv, params->offset_Y, tmp_width);
 819         sheight = params->src_h;
 820         iowrite32(i915_ggtt_offset(vma) + params->offset_Y, &regs->OBUF_0Y);
 821         ostride = params->stride_Y;
 822
 823         if (params->format & I915_OVERLAY_YUV_PLANAR) {
 824                 int uv_hscale = uv_hsubsampling(params->format);
 825                 int uv_vscale = uv_vsubsampling(params->format);
 826                 u32 tmp_U, tmp_V;
 827                 swidth |= (params->src_w/uv_hscale) << 16;
 828                 tmp_U = calc_swidthsw(dev_priv, params->offset_U,
 829                                       params->src_w/uv_hscale);
 830                 tmp_V = calc_swidthsw(dev_priv, params->offset_V,
 831                                       params->src_w/uv_hscale);
 832                 swidthsw |= max_t(u32, tmp_U, tmp_V) << 16;
 833                 sheight |= (params->src_h/uv_vscale) << 16;
 834                 iowrite32(i915_ggtt_offset(vma) + params->offset_U,
 835                           &regs->OBUF_0U);
 836                 iowrite32(i915_ggtt_offset(vma) + params->offset_V,
 837                           &regs->OBUF_0V);
 838                 ostride |= params->stride_UV << 16;
 839         }
 840
 841         iowrite32(swidth, &regs->SWIDTH);
 842         iowrite32(swidthsw, &regs->SWIDTHSW);
 843         iowrite32(sheight, &regs->SHEIGHT);
 844         iowrite32(ostride, &regs->OSTRIDE);
 845
 846         scale_changed = update_scaling_factors(overlay, regs, params);
 847
 848         update_colorkey(overlay, regs);
 849
 850         iowrite32(overlay_cmd_reg(params), &regs->OCMD);
 851
 852         ret = intel_overlay_continue(overlay, vma, scale_changed);
 853         if (ret)
 854                 goto out_unpin;
 855
 856         return 0;
 857
 858 out_unpin:
 859         i915_gem_object_unpin_from_display_plane(vma);
 860 out_pin_section:
 861         atomic_dec(&dev_priv->gpu_error.pending_fb_pin);
 862
 863         return ret;
 864 }
 865
 866 int intel_overlay_switch_off(struct intel_overlay *overlay)
 867 {
 868         struct drm_i915_private *dev_priv = overlay->i915;
 869         int ret;
 870
 871         lockdep_assert_held(&dev_priv->drm.struct_mutex);
 872         WARN_ON(!drm_modeset_is_locked(&dev_priv->drm.mode_config.connection_mutex));
 873
 874         ret = intel_overlay_recover_from_interrupt(overlay);
 875         if (ret != 0)
 876                 return ret;
 877
 878         if (!overlay->active)
 879                 return 0;
 880
 881         ret = intel_overlay_release_old_vid(overlay);
 882         if (ret != 0)
 883                 return ret;
 884
 885         iowrite32(0, &overlay->regs->OCMD);
 886
 887         return intel_overlay_off(overlay);
 888 }
 889
 890 static int check_overlay_possible_on_crtc(struct intel_overlay *overlay,
 891                                           struct intel_crtc *crtc)
 892 {
 893         if (!crtc->active)
 894                 return -EINVAL;
 895
 896         /* can't use the overlay with double wide pipe */
 897         if (crtc->config->double_wide)
 898                 return -EINVAL;
 899
 900         return 0;
 901 }
 902
 903 static void update_pfit_vscale_ratio(struct intel_overlay *overlay)
 904 {
 905         struct drm_i915_private *dev_priv = overlay->i915;
 906         u32 pfit_control = I915_READ(PFIT_CONTROL);
 907         u32 ratio;
 908
 909         /* XXX: This is not the same logic as in the xorg driver, but more in
 910          * line with the intel documentation for the i965
 911          */
 912         if (INTEL_GEN(dev_priv) >= 4) {
 913                 /* on i965 use the PGM reg to read out the autoscaler values */
 914                 ratio = I915_READ(PFIT_PGM_RATIOS) >> PFIT_VERT_SCALE_SHIFT_965;
 915         } else {
 916                 if (pfit_control & VERT_AUTO_SCALE)
 917                         ratio = I915_READ(PFIT_AUTO_RATIOS);
 918                 else
 919                         ratio = I915_READ(PFIT_PGM_RATIOS);
 920                 ratio >>= PFIT_VERT_SCALE_SHIFT;
 921         }
 922
 923         overlay->pfit_vscale_ratio = ratio;
 924 }
 925
 926 static int check_overlay_dst(struct intel_overlay *overlay,
 927                              struct drm_intel_overlay_put_image *rec)
 928 {
 929         const struct intel_crtc_state *pipe_config =
 930                 overlay->crtc->config;
 931
 932         if (rec->dst_height == 0 || rec->dst_width == 0)
 933                 return -EINVAL;
 934
 935         if (rec->dst_x < pipe_config->pipe_src_w &&
 936             rec->dst_x + rec->dst_width <= pipe_config->pipe_src_w &&
 937             rec->dst_y < pipe_config->pipe_src_h &&
 938             rec->dst_y + rec->dst_height <= pipe_config->pipe_src_h)
 939                 return 0;
 940         else
 941                 return -EINVAL;
 942 }
 943
 944 static int check_overlay_scaling(struct put_image_params *rec)
 945 {
 946         u32 tmp;
 947
 948         /* downscaling limit is 8.0 */
 949         tmp = ((rec->src_scan_h << 16) / rec->dst_h) >> 16;
 950         if (tmp > 7)
 951                 return -EINVAL;
 952         tmp = ((rec->src_scan_w << 16) / rec->dst_w) >> 16;
 953         if (tmp > 7)
 954                 return -EINVAL;
 955
 956         return 0;
 957 }
 958
 959 static int check_overlay_src(struct drm_i915_private *dev_priv,
 960                              struct drm_intel_overlay_put_image *rec,
 961                              struct drm_i915_gem_object *new_bo)
 962 {
 963         int uv_hscale = uv_hsubsampling(rec->flags);
 964         int uv_vscale = uv_vsubsampling(rec->flags);
 965         u32 stride_mask;
 966         int depth;
 967         u32 tmp;
 968
 969         /* check src dimensions */
 970         if (IS_I845G(dev_priv) || IS_I830(dev_priv)) {
 971                 if (rec->src_height > IMAGE_MAX_HEIGHT_LEGACY ||
 972                     rec->src_width  > IMAGE_MAX_WIDTH_LEGACY)
 973                         return -EINVAL;
 974         } else {
 975                 if (rec->src_height > IMAGE_MAX_HEIGHT ||
 976                     rec->src_width  > IMAGE_MAX_WIDTH)
 977                         return -EINVAL;
 978         }
 979
 980         /* better safe than sorry, use 4 as the maximal subsampling ratio */
 981         if (rec->src_height < N_VERT_Y_TAPS*4 ||
 982             rec->src_width  < N_HORIZ_Y_TAPS*4)
 983                 return -EINVAL;
 984
 985         /* check alignment constraints */
 986         switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
 987         case I915_OVERLAY_RGB:
 988                 /* not implemented */
 989                 return -EINVAL;
 990
 991         case I915_OVERLAY_YUV_PACKED:
 992                 if (uv_vscale != 1)
 993                         return -EINVAL;
 994
 995                 depth = packed_depth_bytes(rec->flags);
 996                 if (depth < 0)
 997                         return depth;
 998
 999                 /* ignore UV planes */
1000                 rec->stride_UV = 0;
1001                 rec->offset_U = 0;
1002                 rec->offset_V = 0;
1003                 /* check pixel alignment */
1004                 if (rec->offset_Y % depth)
1005                         return -EINVAL;
1006                 break;
1007
1008         case I915_OVERLAY_YUV_PLANAR:
1009                 if (uv_vscale < 0 || uv_hscale < 0)
1010                         return -EINVAL;
1011                 /* no offset restrictions for planar formats */
1012                 break;
1013
1014         default:
1015                 return -EINVAL;
1016         }
1017
1018         if (rec->src_width % uv_hscale)
1019                 return -EINVAL;
1020
1021         /* stride checking */
1022         if (IS_I830(dev_priv) || IS_I845G(dev_priv))
1023                 stride_mask = 255;
1024         else
1025                 stride_mask = 63;
1026
1027         if (rec->stride_Y & stride_mask || rec->stride_UV & stride_mask)
1028                 return -EINVAL;
1029         if (IS_GEN4(dev_priv) && rec->stride_Y < 512)
1030                 return -EINVAL;
1031
1032         tmp = (rec->flags & I915_OVERLAY_TYPE_MASK) == I915_OVERLAY_YUV_PLANAR ?
1033                 4096 : 8192;
1034         if (rec->stride_Y > tmp || rec->stride_UV > 2*1024)
1035                 return -EINVAL;
1036
1037         /* check buffer dimensions */
1038         switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
1039         case I915_OVERLAY_RGB:
1040         case I915_OVERLAY_YUV_PACKED:
1041                 /* always 4 Y values per depth pixels */
1042                 if (packed_width_bytes(rec->flags, rec->src_width) > rec->stride_Y)
1043                         return -EINVAL;
1044
1045                 tmp = rec->stride_Y*rec->src_height;
1046                 if (rec->offset_Y + tmp > new_bo->base.size)
1047                         return -EINVAL;
1048                 break;
1049
1050         case I915_OVERLAY_YUV_PLANAR:
1051                 if (rec->src_width > rec->stride_Y)
1052                         return -EINVAL;
1053                 if (rec->src_width/uv_hscale > rec->stride_UV)
1054                         return -EINVAL;
1055
1056                 tmp = rec->stride_Y * rec->src_height;
1057                 if (rec->offset_Y + tmp > new_bo->base.size)
1058                         return -EINVAL;
1059
1060                 tmp = rec->stride_UV * (rec->src_height / uv_vscale);
1061                 if (rec->offset_U + tmp > new_bo->base.size ||
1062                     rec->offset_V + tmp > new_bo->base.size)
1063                         return -EINVAL;
1064                 break;
1065         }
1066
1067         return 0;
1068 }
1069
1070 int intel_overlay_put_image_ioctl(struct drm_device *dev, void *data,
1071                                   struct drm_file *file_priv)
1072 {
1073         struct drm_intel_overlay_put_image *put_image_rec = data;
1074         struct drm_i915_private *dev_priv = to_i915(dev);
1075         struct intel_overlay *overlay;
1076         struct drm_crtc *drmmode_crtc;
1077         struct intel_crtc *crtc;
1078         struct drm_i915_gem_object *new_bo;
1079         struct put_image_params *params;
1080         int ret;
1081
1082         overlay = dev_priv->overlay;
1083         if (!overlay) {
1084                 DRM_DEBUG("userspace bug: no overlay\n");
1085                 return -ENODEV;
1086         }
1087
1088         if (!(put_image_rec->flags & I915_OVERLAY_ENABLE)) {
1089                 drm_modeset_lock_all(dev);
1090                 mutex_lock(&dev->struct_mutex);
1091
1092                 ret = intel_overlay_switch_off(overlay);
1093
1094                 mutex_unlock(&dev->struct_mutex);
1095                 drm_modeset_unlock_all(dev);
1096
1097                 return ret;
1098         }
1099
1100         params = kmalloc(sizeof(*params), GFP_KERNEL);
1101         if (!params)
1102                 return -ENOMEM;
1103
1104         drmmode_crtc = drm_crtc_find(dev, file_priv, put_image_rec->crtc_id);
1105         if (!drmmode_crtc) {
1106                 ret = -ENOENT;
1107                 goto out_free;
1108         }
1109         crtc = to_intel_crtc(drmmode_crtc);
1110
1111         new_bo = i915_gem_object_lookup(file_priv, put_image_rec->bo_handle);
1112         if (!new_bo) {
1113                 ret = -ENOENT;
1114                 goto out_free;
1115         }
1116
1117         drm_modeset_lock_all(dev);
1118         mutex_lock(&dev->struct_mutex);
1119
1120         if (i915_gem_object_is_tiled(new_bo)) {
1121                 DRM_DEBUG_KMS("buffer used for overlay image can not be tiled\n");
1122                 ret = -EINVAL;
1123                 goto out_unlock;
1124         }
1125
1126         ret = intel_overlay_recover_from_interrupt(overlay);
1127         if (ret != 0)
1128                 goto out_unlock;
1129
1130         if (overlay->crtc != crtc) {
1131                 ret = intel_overlay_switch_off(overlay);
1132                 if (ret != 0)
1133                         goto out_unlock;
1134
1135                 ret = check_overlay_possible_on_crtc(overlay, crtc);
1136                 if (ret != 0)
1137                         goto out_unlock;
1138
1139                 overlay->crtc = crtc;
1140                 crtc->overlay = overlay;
1141
1142                 /* line too wide, i.e. one-line-mode */
1143                 if (crtc->config->pipe_src_w > 1024 &&
1144                     crtc->config->gmch_pfit.control & PFIT_ENABLE) {
1145                         overlay->pfit_active = true;
1146                         update_pfit_vscale_ratio(overlay);
1147                 } else
1148                         overlay->pfit_active = false;
1149         }
1150
1151         ret = check_overlay_dst(overlay, put_image_rec);
1152         if (ret != 0)
1153                 goto out_unlock;
1154
1155         if (overlay->pfit_active) {
1156                 params->dst_y = ((((u32)put_image_rec->dst_y) << 12) /
1157                                  overlay->pfit_vscale_ratio);
1158                 /* shifting right rounds downwards, so add 1 */
1159                 params->dst_h = ((((u32)put_image_rec->dst_height) << 12) /
1160                                  overlay->pfit_vscale_ratio) + 1;
1161         } else {
1162                 params->dst_y = put_image_rec->dst_y;
1163                 params->dst_h = put_image_rec->dst_height;
1164         }
1165         params->dst_x = put_image_rec->dst_x;
1166         params->dst_w = put_image_rec->dst_width;
1167
1168         params->src_w = put_image_rec->src_width;
1169         params->src_h = put_image_rec->src_height;
1170         params->src_scan_w = put_image_rec->src_scan_width;
1171         params->src_scan_h = put_image_rec->src_scan_height;
1172         if (params->src_scan_h > params->src_h ||
1173             params->src_scan_w > params->src_w) {
1174                 ret = -EINVAL;
1175                 goto out_unlock;
1176         }
1177
1178         ret = check_overlay_src(dev_priv, put_image_rec, new_bo);
1179         if (ret != 0)
1180                 goto out_unlock;
1181         params->format = put_image_rec->flags & ~I915_OVERLAY_FLAGS_MASK;
1182         params->stride_Y = put_image_rec->stride_Y;
1183         params->stride_UV = put_image_rec->stride_UV;
1184         params->offset_Y = put_image_rec->offset_Y;
1185         params->offset_U = put_image_rec->offset_U;
1186         params->offset_V = put_image_rec->offset_V;
1187
1188         /* Check scaling after src size to prevent a divide-by-zero. */
1189         ret = check_overlay_scaling(params);
1190         if (ret != 0)
1191                 goto out_unlock;
1192
1193         ret = intel_overlay_do_put_image(overlay, new_bo, params);
1194         if (ret != 0)
1195                 goto out_unlock;
1196
1197         mutex_unlock(&dev->struct_mutex);
1198         drm_modeset_unlock_all(dev);
1199         i915_gem_object_put(new_bo);
1200
1201         kfree(params);
1202
1203         return 0;
1204
1205 out_unlock:
1206         mutex_unlock(&dev->struct_mutex);
1207         drm_modeset_unlock_all(dev);
1208         i915_gem_object_put(new_bo);
1209 out_free:
1210         kfree(params);
1211
1212         return ret;
1213 }
1214
1215 static void update_reg_attrs(struct intel_overlay *overlay,
1216                              struct overlay_registers __iomem *regs)
1217 {
1218         iowrite32((overlay->contrast << 18) | (overlay->brightness & 0xff),
1219                   &regs->OCLRC0);
1220         iowrite32(overlay->saturation, &regs->OCLRC1);
1221 }
1222
1223 static bool check_gamma_bounds(u32 gamma1, u32 gamma2)
1224 {
1225         int i;
1226
1227         if (gamma1 & 0xff000000 || gamma2 & 0xff000000)
1228                 return false;
1229
1230         for (i = 0; i < 3; i++) {
1231                 if (((gamma1 >> i*8) & 0xff) >= ((gamma2 >> i*8) & 0xff))
1232                         return false;
1233         }
1234
1235         return true;
1236 }
1237
1238 static bool check_gamma5_errata(u32 gamma5)
1239 {
1240         int i;
1241
1242         for (i = 0; i < 3; i++) {
1243                 if (((gamma5 >> i*8) & 0xff) == 0x80)
1244                         return false;
1245         }
1246
1247         return true;
1248 }
1249
1250 static int check_gamma(struct drm_intel_overlay_attrs *attrs)
1251 {
1252         if (!check_gamma_bounds(0, attrs->gamma0) ||
1253             !check_gamma_bounds(attrs->gamma0, attrs->gamma1) ||
1254             !check_gamma_bounds(attrs->gamma1, attrs->gamma2) ||
1255             !check_gamma_bounds(attrs->gamma2, attrs->gamma3) ||
1256             !check_gamma_bounds(attrs->gamma3, attrs->gamma4) ||
1257             !check_gamma_bounds(attrs->gamma4, attrs->gamma5) ||
1258             !check_gamma_bounds(attrs->gamma5, 0x00ffffff))
1259                 return -EINVAL;
1260
1261         if (!check_gamma5_errata(attrs->gamma5))
1262                 return -EINVAL;
1263
1264         return 0;
1265 }
1266
1267 int intel_overlay_attrs_ioctl(struct drm_device *dev, void *data,
1268                               struct drm_file *file_priv)
1269 {
1270         struct drm_intel_overlay_attrs *attrs = data;
1271         struct drm_i915_private *dev_priv = to_i915(dev);
1272         struct intel_overlay *overlay;
1273         int ret;
1274
1275         overlay = dev_priv->overlay;
1276         if (!overlay) {
1277                 DRM_DEBUG("userspace bug: no overlay\n");
1278                 return -ENODEV;
1279         }
1280
1281         drm_modeset_lock_all(dev);
1282         mutex_lock(&dev->struct_mutex);
1283
1284         ret = -EINVAL;
1285         if (!(attrs->flags & I915_OVERLAY_UPDATE_ATTRS)) {
1286                 attrs->color_key  = overlay->color_key;
1287                 attrs->brightness = overlay->brightness;
1288                 attrs->contrast   = overlay->contrast;
1289                 attrs->saturation = overlay->saturation;
1290
1291                 if (!IS_GEN2(dev_priv)) {
1292                         attrs->gamma0 = I915_READ(OGAMC0);
1293                         attrs->gamma1 = I915_READ(OGAMC1);
1294                         attrs->gamma2 = I915_READ(OGAMC2);
1295                         attrs->gamma3 = I915_READ(OGAMC3);
1296                         attrs->gamma4 = I915_READ(OGAMC4);
1297                         attrs->gamma5 = I915_READ(OGAMC5);
1298                 }
1299         } else {
1300                 if (attrs->brightness < -128 || attrs->brightness > 127)
1301                         goto out_unlock;
1302                 if (attrs->contrast > 255)
1303                         goto out_unlock;
1304                 if (attrs->saturation > 1023)
1305                         goto out_unlock;
1306
1307                 overlay->color_key  = attrs->color_key;
1308                 overlay->brightness = attrs->brightness;
1309                 overlay->contrast   = attrs->contrast;
1310                 overlay->saturation = attrs->saturation;
1311
1312                 update_reg_attrs(overlay, overlay->regs);
1313
1314                 if (attrs->flags & I915_OVERLAY_UPDATE_GAMMA) {
1315                         if (IS_GEN2(dev_priv))
1316                                 goto out_unlock;
1317
1318                         if (overlay->active) {
1319                                 ret = -EBUSY;
1320                                 goto out_unlock;
1321                         }
1322
1323                         ret = check_gamma(attrs);
1324                         if (ret)
1325                                 goto out_unlock;
1326
1327                         I915_WRITE(OGAMC0, attrs->gamma0);
1328                         I915_WRITE(OGAMC1, attrs->gamma1);
1329                         I915_WRITE(OGAMC2, attrs->gamma2);
1330                         I915_WRITE(OGAMC3, attrs->gamma3);
1331                         I915_WRITE(OGAMC4, attrs->gamma4);
1332                         I915_WRITE(OGAMC5, attrs->gamma5);
1333                 }
1334         }
1335         overlay->color_key_enabled = (attrs->flags & I915_OVERLAY_DISABLE_DEST_COLORKEY) == 0;
1336
1337         ret = 0;
1338 out_unlock:
1339         mutex_unlock(&dev->struct_mutex);
1340         drm_modeset_unlock_all(dev);
1341
1342         return ret;
1343 }
1344
1345 static int get_registers(struct intel_overlay *overlay, bool use_phys)
1346 {
1347         struct drm_i915_gem_object *obj;
1348         struct i915_vma *vma;
1349         int err;
1350
1351         obj = i915_gem_object_create_stolen(overlay->i915, PAGE_SIZE);
1352         if (obj == NULL)
1353                 obj = i915_gem_object_create_internal(overlay->i915, PAGE_SIZE);
1354         if (IS_ERR(obj))
1355                 return PTR_ERR(obj);
1356
1357         vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, PIN_MAPPABLE);
1358         if (IS_ERR(vma)) {
1359                 err = PTR_ERR(vma);
1360                 goto err_put_bo;
1361         }
1362
1363         if (use_phys)
1364                 overlay->flip_addr = sg_dma_address(obj->mm.pages->sgl);
1365         else
1366                 overlay->flip_addr = i915_ggtt_offset(vma);
1367         overlay->regs = i915_vma_pin_iomap(vma);
1368         i915_vma_unpin(vma);
1369
1370         if (IS_ERR(overlay->regs)) {
1371                 err = PTR_ERR(overlay->regs);
1372                 goto err_put_bo;
1373         }
1374
1375         overlay->reg_bo = obj;
1376         return 0;
1377
1378 err_put_bo:
1379         i915_gem_object_put(obj);
1380         return err;
1381 }
1382
1383 void intel_setup_overlay(struct drm_i915_private *dev_priv)
1384 {
1385         struct intel_overlay *overlay;
1386         int ret;
1387
1388         if (!HAS_OVERLAY(dev_priv))
1389                 return;
1390
1391         overlay = kzalloc(sizeof(*overlay), GFP_KERNEL);
1392         if (!overlay)
1393                 return;
1394
1395         overlay->i915 = dev_priv;
1396
1397         overlay->color_key = 0x0101fe;
1398         overlay->color_key_enabled = true;
1399         overlay->brightness = -19;
1400         overlay->contrast = 75;
1401         overlay->saturation = 146;
1402
1403         init_request_active(&overlay->last_flip, NULL);
1404
1405         mutex_lock(&dev_priv->drm.struct_mutex);
1406
1407         ret = get_registers(overlay, OVERLAY_NEEDS_PHYSICAL(dev_priv));
1408         if (ret)
1409                 goto out_free;
1410
1411         ret = i915_gem_object_set_to_gtt_domain(overlay->reg_bo, true);
1412         if (ret)
1413                 goto out_reg_bo;
1414
1415         mutex_unlock(&dev_priv->drm.struct_mutex);
1416
1417         memset_io(overlay->regs, 0, sizeof(struct overlay_registers));
1418         update_polyphase_filter(overlay->regs);
1419         update_reg_attrs(overlay, overlay->regs);
1420
1421         dev_priv->overlay = overlay;
1422         DRM_INFO("Initialized overlay support.\n");
1423         return;
1424
1425 out_reg_bo:
1426         i915_gem_object_put(overlay->reg_bo);
1427 out_free:
1428         mutex_unlock(&dev_priv->drm.struct_mutex);
1429         kfree(overlay);
1430 }
1431
1432 void intel_cleanup_overlay(struct drm_i915_private *dev_priv)
1433 {
1434         struct intel_overlay *overlay;
1435
1436         overlay = fetch_and_zero(&dev_priv->overlay);
1437         if (!overlay)
1438                 return;
1439
1440         /*
1441          * The bo's should be free'd by the generic code already.
1442          * Furthermore modesetting teardown happens beforehand so the
1443          * hardware should be off already.
1444          */
1445         WARN_ON(overlay->active);
1446
1447         i915_gem_object_put(overlay->reg_bo);
1448
1449         kfree(overlay);
1450 }
1451
1452 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
1453
1454 struct intel_overlay_error_state {
1455         struct overlay_registers regs;
1456         unsigned long base;
1457         u32 dovsta;
1458         u32 isr;
1459 };
1460
1461 struct intel_overlay_error_state *
1462 intel_overlay_capture_error_state(struct drm_i915_private *dev_priv)
1463 {
1464         struct intel_overlay *overlay = dev_priv->overlay;
1465         struct intel_overlay_error_state *error;
1466
1467         if (!overlay || !overlay->active)
1468                 return NULL;
1469
1470         error = kmalloc(sizeof(*error), GFP_ATOMIC);
1471         if (error == NULL)
1472                 return NULL;
1473
1474         error->dovsta = I915_READ(DOVSTA);
1475         error->isr = I915_READ(ISR);
1476         error->base = overlay->flip_addr;
1477
1478         memcpy_fromio(&error->regs, overlay->regs, sizeof(error->regs));
1479
1480         return error;
1481 }
1482
1483 void
1484 intel_overlay_print_error_state(struct drm_i915_error_state_buf *m,
1485                                 struct intel_overlay_error_state *error)
1486 {
1487         i915_error_printf(m, "Overlay, status: 0x%08x, interrupt: 0x%08x\n",
1488                           error->dovsta, error->isr);
1489         i915_error_printf(m, "  Register file at 0x%08lx:\n",
1490                           error->base);
1491
1492 #define P(x) i915_error_printf(m, "    " #x ":  0x%08x\n", error->regs.x)
1493         P(OBUF_0Y);
1494         P(OBUF_1Y);
1495         P(OBUF_0U);
1496         P(OBUF_0V);
1497         P(OBUF_1U);
1498         P(OBUF_1V);
1499         P(OSTRIDE);
1500         P(YRGB_VPH);
1501         P(UV_VPH);
1502         P(HORZ_PH);
1503         P(INIT_PHS);
1504         P(DWINPOS);
1505         P(DWINSZ);
1506         P(SWIDTH);
1507         P(SWIDTHSW);
1508         P(SHEIGHT);
1509         P(YRGBSCALE);
1510         P(UVSCALE);
1511         P(OCLRC0);
1512         P(OCLRC1);
1513         P(DCLRKV);
1514         P(DCLRKM);
1515         P(SCLRKVH);
1516         P(SCLRKVL);
1517         P(SCLRKEN);
1518         P(OCONFIG);
1519         P(OCMD);
1520         P(OSTART_0Y);
1521         P(OSTART_1Y);
1522         P(OSTART_0U);
1523         P(OSTART_0V);
1524         P(OSTART_1U);
1525         P(OSTART_1V);
1526         P(OTILEOFF_0Y);
1527         P(OTILEOFF_1Y);
1528         P(OTILEOFF_0U);
1529         P(OTILEOFF_0V);
1530         P(OTILEOFF_1U);
1531         P(OTILEOFF_1V);
1532         P(FASTHSCALE);
1533         P(UVSCALEV);
1534 #undef P
1535 }
1536
1537 #endif