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 <[email protected]>
  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         u32 flip_addr;
 185         struct drm_i915_gem_object *reg_bo;
 186         /* flip handling */
 187         struct i915_gem_active last_flip;
 188 };
 189
 190 static void i830_overlay_clock_gating(struct drm_i915_private *dev_priv,
 191                                       bool enable)
 192 {
 193         struct pci_dev *pdev = dev_priv->drm.pdev;
 194         u8 val;
 195
 196         /* WA_OVERLAY_CLKGATE:alm */
 197         if (enable)
 198                 I915_WRITE(DSPCLK_GATE_D, 0);
 199         else
 200                 I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE);
 201
 202         /* WA_DISABLE_L2CACHE_CLOCK_GATING:alm */
 203         pci_bus_read_config_byte(pdev->bus,
 204                                  PCI_DEVFN(0, 0), I830_CLOCK_GATE, &val);
 205         if (enable)
 206                 val &= ~I830_L2_CACHE_CLOCK_GATE_DISABLE;
 207         else
 208                 val |= I830_L2_CACHE_CLOCK_GATE_DISABLE;
 209         pci_bus_write_config_byte(pdev->bus,
 210                                   PCI_DEVFN(0, 0), I830_CLOCK_GATE, val);
 211 }
 212
 213 static struct overlay_registers __iomem *
 214 intel_overlay_map_regs(struct intel_overlay *overlay)
 215 {
 216         struct drm_i915_private *dev_priv = overlay->i915;
 217         struct overlay_registers __iomem *regs;
 218
 219         if (OVERLAY_NEEDS_PHYSICAL(dev_priv))
 220                 regs = (struct overlay_registers __iomem *)overlay->reg_bo->phys_handle->vaddr;
 221         else
 222                 regs = io_mapping_map_wc(&dev_priv->ggtt.iomap,
 223                                          overlay->flip_addr,
 224                                          PAGE_SIZE);
 225
 226         return regs;
 227 }
 228
 229 static void intel_overlay_unmap_regs(struct intel_overlay *overlay,
 230                                      struct overlay_registers __iomem *regs)
 231 {
 232         if (!OVERLAY_NEEDS_PHYSICAL(overlay->i915))
 233                 io_mapping_unmap(regs);
 234 }
 235
 236 static void intel_overlay_submit_request(struct intel_overlay *overlay,
 237                                          struct i915_request *rq,
 238                                          i915_gem_retire_fn retire)
 239 {
 240         GEM_BUG_ON(i915_gem_active_peek(&overlay->last_flip,
 241                                         &overlay->i915->drm.struct_mutex));
 242         i915_gem_active_set_retire_fn(&overlay->last_flip, retire,
 243                                       &overlay->i915->drm.struct_mutex);
 244         i915_gem_active_set(&overlay->last_flip, rq);
 245         i915_request_add(rq);
 246 }
 247
 248 static int intel_overlay_do_wait_request(struct intel_overlay *overlay,
 249                                          struct i915_request *rq,
 250                                          i915_gem_retire_fn retire)
 251 {
 252         intel_overlay_submit_request(overlay, rq, retire);
 253         return i915_gem_active_retire(&overlay->last_flip,
 254                                       &overlay->i915->drm.struct_mutex);
 255 }
 256
 257 static struct i915_request *alloc_request(struct intel_overlay *overlay)
 258 {
 259         struct drm_i915_private *dev_priv = overlay->i915;
 260         struct intel_engine_cs *engine = dev_priv->engine[RCS];
 261
 262         return i915_request_alloc(engine, dev_priv->kernel_context);
 263 }
 264
 265 /* overlay needs to be disable in OCMD reg */
 266 static int intel_overlay_on(struct intel_overlay *overlay)
 267 {
 268         struct drm_i915_private *dev_priv = overlay->i915;
 269         struct i915_request *rq;
 270         u32 *cs;
 271
 272         WARN_ON(overlay->active);
 273
 274         rq = alloc_request(overlay);
 275         if (IS_ERR(rq))
 276                 return PTR_ERR(rq);
 277
 278         cs = intel_ring_begin(rq, 4);
 279         if (IS_ERR(cs)) {
 280                 i915_request_add(rq);
 281                 return PTR_ERR(cs);
 282         }
 283
 284         overlay->active = true;
 285
 286         if (IS_I830(dev_priv))
 287                 i830_overlay_clock_gating(dev_priv, false);
 288
 289         *cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_ON;
 290         *cs++ = overlay->flip_addr | OFC_UPDATE;
 291         *cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
 292         *cs++ = MI_NOOP;
 293         intel_ring_advance(rq, cs);
 294
 295         return intel_overlay_do_wait_request(overlay, rq, NULL);
 296 }
 297
 298 static void intel_overlay_flip_prepare(struct intel_overlay *overlay,
 299                                        struct i915_vma *vma)
 300 {
 301         enum pipe pipe = overlay->crtc->pipe;
 302
 303         WARN_ON(overlay->old_vma);
 304
 305         i915_gem_track_fb(overlay->vma ? overlay->vma->obj : NULL,
 306                           vma ? vma->obj : NULL,
 307                           INTEL_FRONTBUFFER_OVERLAY(pipe));
 308
 309         intel_frontbuffer_flip_prepare(overlay->i915,
 310                                        INTEL_FRONTBUFFER_OVERLAY(pipe));
 311
 312         overlay->old_vma = overlay->vma;
 313         if (vma)
 314                 overlay->vma = i915_vma_get(vma);
 315         else
 316                 overlay->vma = NULL;
 317 }
 318
 319 /* overlay needs to be enabled in OCMD reg */
 320 static int intel_overlay_continue(struct intel_overlay *overlay,
 321                                   struct i915_vma *vma,
 322                                   bool load_polyphase_filter)
 323 {
 324         struct drm_i915_private *dev_priv = overlay->i915;
 325         struct i915_request *rq;
 326         u32 flip_addr = overlay->flip_addr;
 327         u32 tmp, *cs;
 328
 329         WARN_ON(!overlay->active);
 330
 331         if (load_polyphase_filter)
 332                 flip_addr |= OFC_UPDATE;
 333
 334         /* check for underruns */
 335         tmp = I915_READ(DOVSTA);
 336         if (tmp & (1 << 17))
 337                 DRM_DEBUG("overlay underrun, DOVSTA: %x\n", tmp);
 338
 339         rq = alloc_request(overlay);
 340         if (IS_ERR(rq))
 341                 return PTR_ERR(rq);
 342
 343         cs = intel_ring_begin(rq, 2);
 344         if (IS_ERR(cs)) {
 345                 i915_request_add(rq);
 346                 return PTR_ERR(cs);
 347         }
 348
 349         *cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE;
 350         *cs++ = flip_addr;
 351         intel_ring_advance(rq, cs);
 352
 353         intel_overlay_flip_prepare(overlay, vma);
 354
 355         intel_overlay_submit_request(overlay, rq, NULL);
 356
 357         return 0;
 358 }
 359
 360 static void intel_overlay_release_old_vma(struct intel_overlay *overlay)
 361 {
 362         struct i915_vma *vma;
 363
 364         vma = fetch_and_zero(&overlay->old_vma);
 365         if (WARN_ON(!vma))
 366                 return;
 367
 368         intel_frontbuffer_flip_complete(overlay->i915,
 369                                         INTEL_FRONTBUFFER_OVERLAY(overlay->crtc->pipe));
 370
 371         i915_gem_object_unpin_from_display_plane(vma);
 372         i915_vma_put(vma);
 373 }
 374
 375 static void intel_overlay_release_old_vid_tail(struct i915_gem_active *active,
 376                                                struct i915_request *rq)
 377 {
 378         struct intel_overlay *overlay =
 379                 container_of(active, typeof(*overlay), last_flip);
 380
 381         intel_overlay_release_old_vma(overlay);
 382 }
 383
 384 static void intel_overlay_off_tail(struct i915_gem_active *active,
 385                                    struct i915_request *rq)
 386 {
 387         struct intel_overlay *overlay =
 388                 container_of(active, typeof(*overlay), last_flip);
 389         struct drm_i915_private *dev_priv = overlay->i915;
 390
 391         intel_overlay_release_old_vma(overlay);
 392
 393         overlay->crtc->overlay = NULL;
 394         overlay->crtc = NULL;
 395         overlay->active = false;
 396
 397         if (IS_I830(dev_priv))
 398                 i830_overlay_clock_gating(dev_priv, true);
 399 }
 400
 401 /* overlay needs to be disabled in OCMD reg */
 402 static int intel_overlay_off(struct intel_overlay *overlay)
 403 {
 404         struct i915_request *rq;
 405         u32 *cs, flip_addr = overlay->flip_addr;
 406
 407         WARN_ON(!overlay->active);
 408
 409         /* According to intel docs the overlay hw may hang (when switching
 410          * off) without loading the filter coeffs. It is however unclear whether
 411          * this applies to the disabling of the overlay or to the switching off
 412          * of the hw. Do it in both cases */
 413         flip_addr |= OFC_UPDATE;
 414
 415         rq = alloc_request(overlay);
 416         if (IS_ERR(rq))
 417                 return PTR_ERR(rq);
 418
 419         cs = intel_ring_begin(rq, 6);
 420         if (IS_ERR(cs)) {
 421                 i915_request_add(rq);
 422                 return PTR_ERR(cs);
 423         }
 424
 425         /* wait for overlay to go idle */
 426         *cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE;
 427         *cs++ = flip_addr;
 428         *cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
 429
 430         /* turn overlay off */
 431         *cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_OFF;
 432         *cs++ = flip_addr;
 433         *cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
 434
 435         intel_ring_advance(rq, cs);
 436
 437         intel_overlay_flip_prepare(overlay, NULL);
 438
 439         return intel_overlay_do_wait_request(overlay, rq,
 440                                              intel_overlay_off_tail);
 441 }
 442
 443 /* recover from an interruption due to a signal
 444  * We have to be careful not to repeat work forever an make forward progess. */
 445 static int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay)
 446 {
 447         return i915_gem_active_retire(&overlay->last_flip,
 448                                       &overlay->i915->drm.struct_mutex);
 449 }
 450
 451 /* Wait for pending overlay flip and release old frame.
 452  * Needs to be called before the overlay register are changed
 453  * via intel_overlay_(un)map_regs
 454  */
 455 static int intel_overlay_release_old_vid(struct intel_overlay *overlay)
 456 {
 457         struct drm_i915_private *dev_priv = overlay->i915;
 458         u32 *cs;
 459         int ret;
 460
 461         lockdep_assert_held(&dev_priv->drm.struct_mutex);
 462
 463         /* Only wait if there is actually an old frame to release to
 464          * guarantee forward progress.
 465          */
 466         if (!overlay->old_vma)
 467                 return 0;
 468
 469         if (I915_READ(ISR) & I915_OVERLAY_PLANE_FLIP_PENDING_INTERRUPT) {
 470                 /* synchronous slowpath */
 471                 struct i915_request *rq;
 472
 473                 rq = alloc_request(overlay);
 474                 if (IS_ERR(rq))
 475                         return PTR_ERR(rq);
 476
 477                 cs = intel_ring_begin(rq, 2);
 478                 if (IS_ERR(cs)) {
 479                         i915_request_add(rq);
 480                         return PTR_ERR(cs);
 481                 }
 482
 483                 *cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
 484                 *cs++ = MI_NOOP;
 485                 intel_ring_advance(rq, cs);
 486
 487                 ret = intel_overlay_do_wait_request(overlay, rq,
 488                                                     intel_overlay_release_old_vid_tail);
 489                 if (ret)
 490                         return ret;
 491         } else
 492                 intel_overlay_release_old_vid_tail(&overlay->last_flip, NULL);
 493
 494         return 0;
 495 }
 496
 497 void intel_overlay_reset(struct drm_i915_private *dev_priv)
 498 {
 499         struct intel_overlay *overlay = dev_priv->overlay;
 500
 501         if (!overlay)
 502                 return;
 503
 504         intel_overlay_release_old_vid(overlay);
 505
 506         overlay->old_xscale = 0;
 507         overlay->old_yscale = 0;
 508         overlay->crtc = NULL;
 509         overlay->active = false;
 510 }
 511
 512 struct put_image_params {
 513         int format;
 514         short dst_x;
 515         short dst_y;
 516         short dst_w;
 517         short dst_h;
 518         short src_w;
 519         short src_scan_h;
 520         short src_scan_w;
 521         short src_h;
 522         short stride_Y;
 523         short stride_UV;
 524         int offset_Y;
 525         int offset_U;
 526         int offset_V;
 527 };
 528
 529 static int packed_depth_bytes(u32 format)
 530 {
 531         switch (format & I915_OVERLAY_DEPTH_MASK) {
 532         case I915_OVERLAY_YUV422:
 533                 return 4;
 534         case I915_OVERLAY_YUV411:
 535                 /* return 6; not implemented */
 536         default:
 537                 return -EINVAL;
 538         }
 539 }
 540
 541 static int packed_width_bytes(u32 format, short width)
 542 {
 543         switch (format & I915_OVERLAY_DEPTH_MASK) {
 544         case I915_OVERLAY_YUV422:
 545                 return width << 1;
 546         default:
 547                 return -EINVAL;
 548         }
 549 }
 550
 551 static int uv_hsubsampling(u32 format)
 552 {
 553         switch (format & I915_OVERLAY_DEPTH_MASK) {
 554         case I915_OVERLAY_YUV422:
 555         case I915_OVERLAY_YUV420:
 556                 return 2;
 557         case I915_OVERLAY_YUV411:
 558         case I915_OVERLAY_YUV410:
 559                 return 4;
 560         default:
 561                 return -EINVAL;
 562         }
 563 }
 564
 565 static int uv_vsubsampling(u32 format)
 566 {
 567         switch (format & I915_OVERLAY_DEPTH_MASK) {
 568         case I915_OVERLAY_YUV420:
 569         case I915_OVERLAY_YUV410:
 570                 return 2;
 571         case I915_OVERLAY_YUV422:
 572         case I915_OVERLAY_YUV411:
 573                 return 1;
 574         default:
 575                 return -EINVAL;
 576         }
 577 }
 578
 579 static u32 calc_swidthsw(struct drm_i915_private *dev_priv, u32 offset, u32 width)
 580 {
 581         u32 sw;
 582
 583         if (IS_GEN2(dev_priv))
 584                 sw = ALIGN((offset & 31) + width, 32);
 585         else
 586                 sw = ALIGN((offset & 63) + width, 64);
 587
 588         if (sw == 0)
 589                 return 0;
 590
 591         return (sw - 32) >> 3;
 592 }
 593
 594 static const u16 y_static_hcoeffs[N_PHASES][N_HORIZ_Y_TAPS] = {
 595         [ 0] = { 0x3000, 0xb4a0, 0x1930, 0x1920, 0xb4a0, },
 596         [ 1] = { 0x3000, 0xb500, 0x19d0, 0x1880, 0xb440, },
 597         [ 2] = { 0x3000, 0xb540, 0x1a88, 0x2f80, 0xb3e0, },
 598         [ 3] = { 0x3000, 0xb580, 0x1b30, 0x2e20, 0xb380, },
 599         [ 4] = { 0x3000, 0xb5c0, 0x1bd8, 0x2cc0, 0xb320, },
 600         [ 5] = { 0x3020, 0xb5e0, 0x1c60, 0x2b80, 0xb2c0, },
 601         [ 6] = { 0x3020, 0xb5e0, 0x1cf8, 0x2a20, 0xb260, },
 602         [ 7] = { 0x3020, 0xb5e0, 0x1d80, 0x28e0, 0xb200, },
 603         [ 8] = { 0x3020, 0xb5c0, 0x1e08, 0x3f40, 0xb1c0, },
 604         [ 9] = { 0x3020, 0xb580, 0x1e78, 0x3ce0, 0xb160, },
 605         [10] = { 0x3040, 0xb520, 0x1ed8, 0x3aa0, 0xb120, },
 606         [11] = { 0x3040, 0xb4a0, 0x1f30, 0x3880, 0xb0e0, },
 607         [12] = { 0x3040, 0xb400, 0x1f78, 0x3680, 0xb0a0, },
 608         [13] = { 0x3020, 0xb340, 0x1fb8, 0x34a0, 0xb060, },
 609         [14] = { 0x3020, 0xb240, 0x1fe0, 0x32e0, 0xb040, },
 610         [15] = { 0x3020, 0xb140, 0x1ff8, 0x3160, 0xb020, },
 611         [16] = { 0xb000, 0x3000, 0x0800, 0x3000, 0xb000, },
 612 };
 613
 614 static const u16 uv_static_hcoeffs[N_PHASES][N_HORIZ_UV_TAPS] = {
 615         [ 0] = { 0x3000, 0x1800, 0x1800, },
 616         [ 1] = { 0xb000, 0x18d0, 0x2e60, },
 617         [ 2] = { 0xb000, 0x1990, 0x2ce0, },
 618         [ 3] = { 0xb020, 0x1a68, 0x2b40, },
 619         [ 4] = { 0xb040, 0x1b20, 0x29e0, },
 620         [ 5] = { 0xb060, 0x1bd8, 0x2880, },
 621         [ 6] = { 0xb080, 0x1c88, 0x3e60, },
 622         [ 7] = { 0xb0a0, 0x1d28, 0x3c00, },
 623         [ 8] = { 0xb0c0, 0x1db8, 0x39e0, },
 624         [ 9] = { 0xb0e0, 0x1e40, 0x37e0, },
 625         [10] = { 0xb100, 0x1eb8, 0x3620, },
 626         [11] = { 0xb100, 0x1f18, 0x34a0, },
 627         [12] = { 0xb100, 0x1f68, 0x3360, },
 628         [13] = { 0xb0e0, 0x1fa8, 0x3240, },
 629         [14] = { 0xb0c0, 0x1fe0, 0x3140, },
 630         [15] = { 0xb060, 0x1ff0, 0x30a0, },
 631         [16] = { 0x3000, 0x0800, 0x3000, },
 632 };
 633
 634 static void update_polyphase_filter(struct overlay_registers __iomem *regs)
 635 {
 636         memcpy_toio(regs->Y_HCOEFS, y_static_hcoeffs, sizeof(y_static_hcoeffs));
 637         memcpy_toio(regs->UV_HCOEFS, uv_static_hcoeffs,
 638                     sizeof(uv_static_hcoeffs));
 639 }
 640
 641 static bool update_scaling_factors(struct intel_overlay *overlay,
 642                                    struct overlay_registers __iomem *regs,
 643                                    struct put_image_params *params)
 644 {
 645         /* fixed point with a 12 bit shift */
 646         u32 xscale, yscale, xscale_UV, yscale_UV;
 647 #define FP_SHIFT 12
 648 #define FRACT_MASK 0xfff
 649         bool scale_changed = false;
 650         int uv_hscale = uv_hsubsampling(params->format);
 651         int uv_vscale = uv_vsubsampling(params->format);
 652
 653         if (params->dst_w > 1)
 654                 xscale = ((params->src_scan_w - 1) << FP_SHIFT)
 655                         /(params->dst_w);
 656         else
 657                 xscale = 1 << FP_SHIFT;
 658
 659         if (params->dst_h > 1)
 660                 yscale = ((params->src_scan_h - 1) << FP_SHIFT)
 661                         /(params->dst_h);
 662         else
 663                 yscale = 1 << FP_SHIFT;
 664
 665         /*if (params->format & I915_OVERLAY_YUV_PLANAR) {*/
 666         xscale_UV = xscale/uv_hscale;
 667         yscale_UV = yscale/uv_vscale;
 668         /* make the Y scale to UV scale ratio an exact multiply */
 669         xscale = xscale_UV * uv_hscale;
 670         yscale = yscale_UV * uv_vscale;
 671         /*} else {
 672           xscale_UV = 0;
 673           yscale_UV = 0;
 674           }*/
 675
 676         if (xscale != overlay->old_xscale || yscale != overlay->old_yscale)
 677                 scale_changed = true;
 678         overlay->old_xscale = xscale;
 679         overlay->old_yscale = yscale;
 680
 681         iowrite32(((yscale & FRACT_MASK) << 20) |
 682                   ((xscale >> FP_SHIFT)  << 16) |
 683                   ((xscale & FRACT_MASK) << 3),
 684                  &regs->YRGBSCALE);
 685
 686         iowrite32(((yscale_UV & FRACT_MASK) << 20) |
 687                   ((xscale_UV >> FP_SHIFT)  << 16) |
 688                   ((xscale_UV & FRACT_MASK) << 3),
 689                  &regs->UVSCALE);
 690
 691         iowrite32((((yscale    >> FP_SHIFT) << 16) |
 692                    ((yscale_UV >> FP_SHIFT) << 0)),
 693                  &regs->UVSCALEV);
 694
 695         if (scale_changed)
 696                 update_polyphase_filter(regs);
 697
 698         return scale_changed;
 699 }
 700
 701 static void update_colorkey(struct intel_overlay *overlay,
 702                             struct overlay_registers __iomem *regs)
 703 {
 704         const struct intel_plane_state *state =
 705                 to_intel_plane_state(overlay->crtc->base.primary->state);
 706         u32 key = overlay->color_key;
 707         u32 format = 0;
 708         u32 flags = 0;
 709
 710         if (overlay->color_key_enabled)
 711                 flags |= DST_KEY_ENABLE;
 712
 713         if (state->base.visible)
 714                 format = state->base.fb->format->format;
 715
 716         switch (format) {
 717         case DRM_FORMAT_C8:
 718                 key = 0;
 719                 flags |= CLK_RGB8I_MASK;
 720                 break;
 721         case DRM_FORMAT_XRGB1555:
 722                 key = RGB15_TO_COLORKEY(key);
 723                 flags |= CLK_RGB15_MASK;
 724                 break;
 725         case DRM_FORMAT_RGB565:
 726                 key = RGB16_TO_COLORKEY(key);
 727                 flags |= CLK_RGB16_MASK;
 728                 break;
 729         default:
 730                 flags |= CLK_RGB24_MASK;
 731                 break;
 732         }
 733
 734         iowrite32(key, &regs->DCLRKV);
 735         iowrite32(flags, &regs->DCLRKM);
 736 }
 737
 738 static u32 overlay_cmd_reg(struct put_image_params *params)
 739 {
 740         u32 cmd = OCMD_ENABLE | OCMD_BUF_TYPE_FRAME | OCMD_BUFFER0;
 741
 742         if (params->format & I915_OVERLAY_YUV_PLANAR) {
 743                 switch (params->format & I915_OVERLAY_DEPTH_MASK) {
 744                 case I915_OVERLAY_YUV422:
 745                         cmd |= OCMD_YUV_422_PLANAR;
 746                         break;
 747                 case I915_OVERLAY_YUV420:
 748                         cmd |= OCMD_YUV_420_PLANAR;
 749                         break;
 750                 case I915_OVERLAY_YUV411:
 751                 case I915_OVERLAY_YUV410:
 752                         cmd |= OCMD_YUV_410_PLANAR;
 753                         break;
 754                 }
 755         } else { /* YUV packed */
 756                 switch (params->format & I915_OVERLAY_DEPTH_MASK) {
 757                 case I915_OVERLAY_YUV422:
 758                         cmd |= OCMD_YUV_422_PACKED;
 759                         break;
 760                 case I915_OVERLAY_YUV411:
 761                         cmd |= OCMD_YUV_411_PACKED;
 762                         break;
 763                 }
 764
 765                 switch (params->format & I915_OVERLAY_SWAP_MASK) {
 766                 case I915_OVERLAY_NO_SWAP:
 767                         break;
 768                 case I915_OVERLAY_UV_SWAP:
 769                         cmd |= OCMD_UV_SWAP;
 770                         break;
 771                 case I915_OVERLAY_Y_SWAP:
 772                         cmd |= OCMD_Y_SWAP;
 773                         break;
 774                 case I915_OVERLAY_Y_AND_UV_SWAP:
 775                         cmd |= OCMD_Y_AND_UV_SWAP;
 776                         break;
 777                 }
 778         }
 779
 780         return cmd;
 781 }
 782
 783 static int intel_overlay_do_put_image(struct intel_overlay *overlay,
 784                                       struct drm_i915_gem_object *new_bo,
 785                                       struct put_image_params *params)
 786 {
 787         int ret, tmp_width;
 788         struct overlay_registers __iomem *regs;
 789         bool scale_changed = false;
 790         struct drm_i915_private *dev_priv = overlay->i915;
 791         u32 swidth, swidthsw, sheight, ostride;
 792         enum pipe pipe = overlay->crtc->pipe;
 793         struct i915_vma *vma;
 794
 795         lockdep_assert_held(&dev_priv->drm.struct_mutex);
 796         WARN_ON(!drm_modeset_is_locked(&dev_priv->drm.mode_config.connection_mutex));
 797
 798         ret = intel_overlay_release_old_vid(overlay);
 799         if (ret != 0)
 800                 return ret;
 801
 802         atomic_inc(&dev_priv->gpu_error.pending_fb_pin);
 803
 804         vma = i915_gem_object_pin_to_display_plane(new_bo,
 805                                                    0, NULL, PIN_MAPPABLE);
 806         if (IS_ERR(vma)) {
 807                 ret = PTR_ERR(vma);
 808                 goto out_pin_section;
 809         }
 810
 811         ret = i915_vma_put_fence(vma);
 812         if (ret)
 813                 goto out_unpin;
 814
 815         if (!overlay->active) {
 816                 u32 oconfig;
 817                 regs = intel_overlay_map_regs(overlay);
 818                 if (!regs) {
 819                         ret = -ENOMEM;
 820                         goto out_unpin;
 821                 }
 822                 oconfig = OCONF_CC_OUT_8BIT;
 823                 if (IS_GEN4(dev_priv))
 824                         oconfig |= OCONF_CSC_MODE_BT709;
 825                 oconfig |= pipe == 0 ?
 826                         OCONF_PIPE_A : OCONF_PIPE_B;
 827                 iowrite32(oconfig, &regs->OCONFIG);
 828                 intel_overlay_unmap_regs(overlay, regs);
 829
 830                 ret = intel_overlay_on(overlay);
 831                 if (ret != 0)
 832                         goto out_unpin;
 833         }
 834
 835         regs = intel_overlay_map_regs(overlay);
 836         if (!regs) {
 837                 ret = -ENOMEM;
 838                 goto out_unpin;
 839         }
 840
 841         iowrite32((params->dst_y << 16) | params->dst_x, &regs->DWINPOS);
 842         iowrite32((params->dst_h << 16) | params->dst_w, &regs->DWINSZ);
 843
 844         if (params->format & I915_OVERLAY_YUV_PACKED)
 845                 tmp_width = packed_width_bytes(params->format, params->src_w);
 846         else
 847                 tmp_width = params->src_w;
 848
 849         swidth = params->src_w;
 850         swidthsw = calc_swidthsw(dev_priv, params->offset_Y, tmp_width);
 851         sheight = params->src_h;
 852         iowrite32(i915_ggtt_offset(vma) + params->offset_Y, &regs->OBUF_0Y);
 853         ostride = params->stride_Y;
 854
 855         if (params->format & I915_OVERLAY_YUV_PLANAR) {
 856                 int uv_hscale = uv_hsubsampling(params->format);
 857                 int uv_vscale = uv_vsubsampling(params->format);
 858                 u32 tmp_U, tmp_V;
 859                 swidth |= (params->src_w/uv_hscale) << 16;
 860                 tmp_U = calc_swidthsw(dev_priv, params->offset_U,
 861                                       params->src_w/uv_hscale);
 862                 tmp_V = calc_swidthsw(dev_priv, params->offset_V,
 863                                       params->src_w/uv_hscale);
 864                 swidthsw |= max_t(u32, tmp_U, tmp_V) << 16;
 865                 sheight |= (params->src_h/uv_vscale) << 16;
 866                 iowrite32(i915_ggtt_offset(vma) + params->offset_U,
 867                           &regs->OBUF_0U);
 868                 iowrite32(i915_ggtt_offset(vma) + params->offset_V,
 869                           &regs->OBUF_0V);
 870                 ostride |= params->stride_UV << 16;
 871         }
 872
 873         iowrite32(swidth, &regs->SWIDTH);
 874         iowrite32(swidthsw, &regs->SWIDTHSW);
 875         iowrite32(sheight, &regs->SHEIGHT);
 876         iowrite32(ostride, &regs->OSTRIDE);
 877
 878         scale_changed = update_scaling_factors(overlay, regs, params);
 879
 880         update_colorkey(overlay, regs);
 881
 882         iowrite32(overlay_cmd_reg(params), &regs->OCMD);
 883
 884         intel_overlay_unmap_regs(overlay, regs);
 885
 886         ret = intel_overlay_continue(overlay, vma, scale_changed);
 887         if (ret)
 888                 goto out_unpin;
 889
 890         return 0;
 891
 892 out_unpin:
 893         i915_gem_object_unpin_from_display_plane(vma);
 894 out_pin_section:
 895         atomic_dec(&dev_priv->gpu_error.pending_fb_pin);
 896
 897         return ret;
 898 }
 899
 900 int intel_overlay_switch_off(struct intel_overlay *overlay)
 901 {
 902         struct drm_i915_private *dev_priv = overlay->i915;
 903         struct overlay_registers __iomem *regs;
 904         int ret;
 905
 906         lockdep_assert_held(&dev_priv->drm.struct_mutex);
 907         WARN_ON(!drm_modeset_is_locked(&dev_priv->drm.mode_config.connection_mutex));
 908
 909         ret = intel_overlay_recover_from_interrupt(overlay);
 910         if (ret != 0)
 911                 return ret;
 912
 913         if (!overlay->active)
 914                 return 0;
 915
 916         ret = intel_overlay_release_old_vid(overlay);
 917         if (ret != 0)
 918                 return ret;
 919
 920         regs = intel_overlay_map_regs(overlay);
 921         iowrite32(0, &regs->OCMD);
 922         intel_overlay_unmap_regs(overlay, regs);
 923
 924         return intel_overlay_off(overlay);
 925 }
 926
 927 static int check_overlay_possible_on_crtc(struct intel_overlay *overlay,
 928                                           struct intel_crtc *crtc)
 929 {
 930         if (!crtc->active)
 931                 return -EINVAL;
 932
 933         /* can't use the overlay with double wide pipe */
 934         if (crtc->config->double_wide)
 935                 return -EINVAL;
 936
 937         return 0;
 938 }
 939
 940 static void update_pfit_vscale_ratio(struct intel_overlay *overlay)
 941 {
 942         struct drm_i915_private *dev_priv = overlay->i915;
 943         u32 pfit_control = I915_READ(PFIT_CONTROL);
 944         u32 ratio;
 945
 946         /* XXX: This is not the same logic as in the xorg driver, but more in
 947          * line with the intel documentation for the i965
 948          */
 949         if (INTEL_GEN(dev_priv) >= 4) {
 950                 /* on i965 use the PGM reg to read out the autoscaler values */
 951                 ratio = I915_READ(PFIT_PGM_RATIOS) >> PFIT_VERT_SCALE_SHIFT_965;
 952         } else {
 953                 if (pfit_control & VERT_AUTO_SCALE)
 954                         ratio = I915_READ(PFIT_AUTO_RATIOS);
 955                 else
 956                         ratio = I915_READ(PFIT_PGM_RATIOS);
 957                 ratio >>= PFIT_VERT_SCALE_SHIFT;
 958         }
 959
 960         overlay->pfit_vscale_ratio = ratio;
 961 }
 962
 963 static int check_overlay_dst(struct intel_overlay *overlay,
 964                              struct drm_intel_overlay_put_image *rec)
 965 {
 966         const struct intel_crtc_state *pipe_config =
 967                 overlay->crtc->config;
 968
 969         if (rec->dst_x < pipe_config->pipe_src_w &&
 970             rec->dst_x + rec->dst_width <= pipe_config->pipe_src_w &&
 971             rec->dst_y < pipe_config->pipe_src_h &&
 972             rec->dst_y + rec->dst_height <= pipe_config->pipe_src_h)
 973                 return 0;
 974         else
 975                 return -EINVAL;
 976 }
 977
 978 static int check_overlay_scaling(struct put_image_params *rec)
 979 {
 980         u32 tmp;
 981
 982         /* downscaling limit is 8.0 */
 983         tmp = ((rec->src_scan_h << 16) / rec->dst_h) >> 16;
 984         if (tmp > 7)
 985                 return -EINVAL;
 986         tmp = ((rec->src_scan_w << 16) / rec->dst_w) >> 16;
 987         if (tmp > 7)
 988                 return -EINVAL;
 989
 990         return 0;
 991 }
 992
 993 static int check_overlay_src(struct drm_i915_private *dev_priv,
 994                              struct drm_intel_overlay_put_image *rec,
 995                              struct drm_i915_gem_object *new_bo)
 996 {
 997         int uv_hscale = uv_hsubsampling(rec->flags);
 998         int uv_vscale = uv_vsubsampling(rec->flags);
 999         u32 stride_mask;
1000         int depth;
1001         u32 tmp;
1002
1003         /* check src dimensions */
1004         if (IS_I845G(dev_priv) || IS_I830(dev_priv)) {
1005                 if (rec->src_height > IMAGE_MAX_HEIGHT_LEGACY ||
1006                     rec->src_width  > IMAGE_MAX_WIDTH_LEGACY)
1007                         return -EINVAL;
1008         } else {
1009                 if (rec->src_height > IMAGE_MAX_HEIGHT ||
1010                     rec->src_width  > IMAGE_MAX_WIDTH)
1011                         return -EINVAL;
1012         }
1013
1014         /* better safe than sorry, use 4 as the maximal subsampling ratio */
1015         if (rec->src_height < N_VERT_Y_TAPS*4 ||
1016             rec->src_width  < N_HORIZ_Y_TAPS*4)
1017                 return -EINVAL;
1018
1019         /* check alignment constraints */
1020         switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
1021         case I915_OVERLAY_RGB:
1022                 /* not implemented */
1023                 return -EINVAL;
1024
1025         case I915_OVERLAY_YUV_PACKED:
1026                 if (uv_vscale != 1)
1027                         return -EINVAL;
1028
1029                 depth = packed_depth_bytes(rec->flags);
1030                 if (depth < 0)
1031                         return depth;
1032
1033                 /* ignore UV planes */
1034                 rec->stride_UV = 0;
1035                 rec->offset_U = 0;
1036                 rec->offset_V = 0;
1037                 /* check pixel alignment */
1038                 if (rec->offset_Y % depth)
1039                         return -EINVAL;
1040                 break;
1041
1042         case I915_OVERLAY_YUV_PLANAR:
1043                 if (uv_vscale < 0 || uv_hscale < 0)
1044                         return -EINVAL;
1045                 /* no offset restrictions for planar formats */
1046                 break;
1047
1048         default:
1049                 return -EINVAL;
1050         }
1051
1052         if (rec->src_width % uv_hscale)
1053                 return -EINVAL;
1054
1055         /* stride checking */
1056         if (IS_I830(dev_priv) || IS_I845G(dev_priv))
1057                 stride_mask = 255;
1058         else
1059                 stride_mask = 63;
1060
1061         if (rec->stride_Y & stride_mask || rec->stride_UV & stride_mask)
1062                 return -EINVAL;
1063         if (IS_GEN4(dev_priv) && rec->stride_Y < 512)
1064                 return -EINVAL;
1065
1066         tmp = (rec->flags & I915_OVERLAY_TYPE_MASK) == I915_OVERLAY_YUV_PLANAR ?
1067                 4096 : 8192;
1068         if (rec->stride_Y > tmp || rec->stride_UV > 2*1024)
1069                 return -EINVAL;
1070
1071         /* check buffer dimensions */
1072         switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
1073         case I915_OVERLAY_RGB:
1074         case I915_OVERLAY_YUV_PACKED:
1075                 /* always 4 Y values per depth pixels */
1076                 if (packed_width_bytes(rec->flags, rec->src_width) > rec->stride_Y)
1077                         return -EINVAL;
1078
1079                 tmp = rec->stride_Y*rec->src_height;
1080                 if (rec->offset_Y + tmp > new_bo->base.size)
1081                         return -EINVAL;
1082                 break;
1083
1084         case I915_OVERLAY_YUV_PLANAR:
1085                 if (rec->src_width > rec->stride_Y)
1086                         return -EINVAL;
1087                 if (rec->src_width/uv_hscale > rec->stride_UV)
1088                         return -EINVAL;
1089
1090                 tmp = rec->stride_Y * rec->src_height;
1091                 if (rec->offset_Y + tmp > new_bo->base.size)
1092                         return -EINVAL;
1093
1094                 tmp = rec->stride_UV * (rec->src_height / uv_vscale);
1095                 if (rec->offset_U + tmp > new_bo->base.size ||
1096                     rec->offset_V + tmp > new_bo->base.size)
1097                         return -EINVAL;
1098                 break;
1099         }
1100
1101         return 0;
1102 }
1103
1104 int intel_overlay_put_image_ioctl(struct drm_device *dev, void *data,
1105                                   struct drm_file *file_priv)
1106 {
1107         struct drm_intel_overlay_put_image *put_image_rec = data;
1108         struct drm_i915_private *dev_priv = to_i915(dev);
1109         struct intel_overlay *overlay;
1110         struct drm_crtc *drmmode_crtc;
1111         struct intel_crtc *crtc;
1112         struct drm_i915_gem_object *new_bo;
1113         struct put_image_params *params;
1114         int ret;
1115
1116         overlay = dev_priv->overlay;
1117         if (!overlay) {
1118                 DRM_DEBUG("userspace bug: no overlay\n");
1119                 return -ENODEV;
1120         }
1121
1122         if (!(put_image_rec->flags & I915_OVERLAY_ENABLE)) {
1123                 drm_modeset_lock_all(dev);
1124                 mutex_lock(&dev->struct_mutex);
1125
1126                 ret = intel_overlay_switch_off(overlay);
1127
1128                 mutex_unlock(&dev->struct_mutex);
1129                 drm_modeset_unlock_all(dev);
1130
1131                 return ret;
1132         }
1133
1134         params = kmalloc(sizeof(*params), GFP_KERNEL);
1135         if (!params)
1136                 return -ENOMEM;
1137
1138         drmmode_crtc = drm_crtc_find(dev, file_priv, put_image_rec->crtc_id);
1139         if (!drmmode_crtc) {
1140                 ret = -ENOENT;
1141                 goto out_free;
1142         }
1143         crtc = to_intel_crtc(drmmode_crtc);
1144
1145         new_bo = i915_gem_object_lookup(file_priv, put_image_rec->bo_handle);
1146         if (!new_bo) {
1147                 ret = -ENOENT;
1148                 goto out_free;
1149         }
1150
1151         drm_modeset_lock_all(dev);
1152         mutex_lock(&dev->struct_mutex);
1153
1154         if (i915_gem_object_is_tiled(new_bo)) {
1155                 DRM_DEBUG_KMS("buffer used for overlay image can not be tiled\n");
1156                 ret = -EINVAL;
1157                 goto out_unlock;
1158         }
1159
1160         ret = intel_overlay_recover_from_interrupt(overlay);
1161         if (ret != 0)
1162                 goto out_unlock;
1163
1164         if (overlay->crtc != crtc) {
1165                 ret = intel_overlay_switch_off(overlay);
1166                 if (ret != 0)
1167                         goto out_unlock;
1168
1169                 ret = check_overlay_possible_on_crtc(overlay, crtc);
1170                 if (ret != 0)
1171                         goto out_unlock;
1172
1173                 overlay->crtc = crtc;
1174                 crtc->overlay = overlay;
1175
1176                 /* line too wide, i.e. one-line-mode */
1177                 if (crtc->config->pipe_src_w > 1024 &&
1178                     crtc->config->gmch_pfit.control & PFIT_ENABLE) {
1179                         overlay->pfit_active = true;
1180                         update_pfit_vscale_ratio(overlay);
1181                 } else
1182                         overlay->pfit_active = false;
1183         }
1184
1185         ret = check_overlay_dst(overlay, put_image_rec);
1186         if (ret != 0)
1187                 goto out_unlock;
1188
1189         if (overlay->pfit_active) {
1190                 params->dst_y = ((((u32)put_image_rec->dst_y) << 12) /
1191                                  overlay->pfit_vscale_ratio);
1192                 /* shifting right rounds downwards, so add 1 */
1193                 params->dst_h = ((((u32)put_image_rec->dst_height) << 12) /
1194                                  overlay->pfit_vscale_ratio) + 1;
1195         } else {
1196                 params->dst_y = put_image_rec->dst_y;
1197                 params->dst_h = put_image_rec->dst_height;
1198         }
1199         params->dst_x = put_image_rec->dst_x;
1200         params->dst_w = put_image_rec->dst_width;
1201
1202         params->src_w = put_image_rec->src_width;
1203         params->src_h = put_image_rec->src_height;
1204         params->src_scan_w = put_image_rec->src_scan_width;
1205         params->src_scan_h = put_image_rec->src_scan_height;
1206         if (params->src_scan_h > params->src_h ||
1207             params->src_scan_w > params->src_w) {
1208                 ret = -EINVAL;
1209                 goto out_unlock;
1210         }
1211
1212         ret = check_overlay_src(dev_priv, put_image_rec, new_bo);
1213         if (ret != 0)
1214                 goto out_unlock;
1215         params->format = put_image_rec->flags & ~I915_OVERLAY_FLAGS_MASK;
1216         params->stride_Y = put_image_rec->stride_Y;
1217         params->stride_UV = put_image_rec->stride_UV;
1218         params->offset_Y = put_image_rec->offset_Y;
1219         params->offset_U = put_image_rec->offset_U;
1220         params->offset_V = put_image_rec->offset_V;
1221
1222         /* Check scaling after src size to prevent a divide-by-zero. */
1223         ret = check_overlay_scaling(params);
1224         if (ret != 0)
1225                 goto out_unlock;
1226
1227         ret = intel_overlay_do_put_image(overlay, new_bo, params);
1228         if (ret != 0)
1229                 goto out_unlock;
1230
1231         mutex_unlock(&dev->struct_mutex);
1232         drm_modeset_unlock_all(dev);
1233         i915_gem_object_put(new_bo);
1234
1235         kfree(params);
1236
1237         return 0;
1238
1239 out_unlock:
1240         mutex_unlock(&dev->struct_mutex);
1241         drm_modeset_unlock_all(dev);
1242         i915_gem_object_put(new_bo);
1243 out_free:
1244         kfree(params);
1245
1246         return ret;
1247 }
1248
1249 static void update_reg_attrs(struct intel_overlay *overlay,
1250                              struct overlay_registers __iomem *regs)
1251 {
1252         iowrite32((overlay->contrast << 18) | (overlay->brightness & 0xff),
1253                   &regs->OCLRC0);
1254         iowrite32(overlay->saturation, &regs->OCLRC1);
1255 }
1256
1257 static bool check_gamma_bounds(u32 gamma1, u32 gamma2)
1258 {
1259         int i;
1260
1261         if (gamma1 & 0xff000000 || gamma2 & 0xff000000)
1262                 return false;
1263
1264         for (i = 0; i < 3; i++) {
1265                 if (((gamma1 >> i*8) & 0xff) >= ((gamma2 >> i*8) & 0xff))
1266                         return false;
1267         }
1268
1269         return true;
1270 }
1271
1272 static bool check_gamma5_errata(u32 gamma5)
1273 {
1274         int i;
1275
1276         for (i = 0; i < 3; i++) {
1277                 if (((gamma5 >> i*8) & 0xff) == 0x80)
1278                         return false;
1279         }
1280
1281         return true;
1282 }
1283
1284 static int check_gamma(struct drm_intel_overlay_attrs *attrs)
1285 {
1286         if (!check_gamma_bounds(0, attrs->gamma0) ||
1287             !check_gamma_bounds(attrs->gamma0, attrs->gamma1) ||
1288             !check_gamma_bounds(attrs->gamma1, attrs->gamma2) ||
1289             !check_gamma_bounds(attrs->gamma2, attrs->gamma3) ||
1290             !check_gamma_bounds(attrs->gamma3, attrs->gamma4) ||
1291             !check_gamma_bounds(attrs->gamma4, attrs->gamma5) ||
1292             !check_gamma_bounds(attrs->gamma5, 0x00ffffff))
1293                 return -EINVAL;
1294
1295         if (!check_gamma5_errata(attrs->gamma5))
1296                 return -EINVAL;
1297
1298         return 0;
1299 }
1300
1301 int intel_overlay_attrs_ioctl(struct drm_device *dev, void *data,
1302                               struct drm_file *file_priv)
1303 {
1304         struct drm_intel_overlay_attrs *attrs = data;
1305         struct drm_i915_private *dev_priv = to_i915(dev);
1306         struct intel_overlay *overlay;
1307         struct overlay_registers __iomem *regs;
1308         int ret;
1309
1310         overlay = dev_priv->overlay;
1311         if (!overlay) {
1312                 DRM_DEBUG("userspace bug: no overlay\n");
1313                 return -ENODEV;
1314         }
1315
1316         drm_modeset_lock_all(dev);
1317         mutex_lock(&dev->struct_mutex);
1318
1319         ret = -EINVAL;
1320         if (!(attrs->flags & I915_OVERLAY_UPDATE_ATTRS)) {
1321                 attrs->color_key  = overlay->color_key;
1322                 attrs->brightness = overlay->brightness;
1323                 attrs->contrast   = overlay->contrast;
1324                 attrs->saturation = overlay->saturation;
1325
1326                 if (!IS_GEN2(dev_priv)) {
1327                         attrs->gamma0 = I915_READ(OGAMC0);
1328                         attrs->gamma1 = I915_READ(OGAMC1);
1329                         attrs->gamma2 = I915_READ(OGAMC2);
1330                         attrs->gamma3 = I915_READ(OGAMC3);
1331                         attrs->gamma4 = I915_READ(OGAMC4);
1332                         attrs->gamma5 = I915_READ(OGAMC5);
1333                 }
1334         } else {
1335                 if (attrs->brightness < -128 || attrs->brightness > 127)
1336                         goto out_unlock;
1337                 if (attrs->contrast > 255)
1338                         goto out_unlock;
1339                 if (attrs->saturation > 1023)
1340                         goto out_unlock;
1341
1342                 overlay->color_key  = attrs->color_key;
1343                 overlay->brightness = attrs->brightness;
1344                 overlay->contrast   = attrs->contrast;
1345                 overlay->saturation = attrs->saturation;
1346
1347                 regs = intel_overlay_map_regs(overlay);
1348                 if (!regs) {
1349                         ret = -ENOMEM;
1350                         goto out_unlock;
1351                 }
1352
1353                 update_reg_attrs(overlay, regs);
1354
1355                 intel_overlay_unmap_regs(overlay, regs);
1356
1357                 if (attrs->flags & I915_OVERLAY_UPDATE_GAMMA) {
1358                         if (IS_GEN2(dev_priv))
1359                                 goto out_unlock;
1360
1361                         if (overlay->active) {
1362                                 ret = -EBUSY;
1363                                 goto out_unlock;
1364                         }
1365
1366                         ret = check_gamma(attrs);
1367                         if (ret)
1368                                 goto out_unlock;
1369
1370                         I915_WRITE(OGAMC0, attrs->gamma0);
1371                         I915_WRITE(OGAMC1, attrs->gamma1);
1372                         I915_WRITE(OGAMC2, attrs->gamma2);
1373                         I915_WRITE(OGAMC3, attrs->gamma3);
1374                         I915_WRITE(OGAMC4, attrs->gamma4);
1375                         I915_WRITE(OGAMC5, attrs->gamma5);
1376                 }
1377         }
1378         overlay->color_key_enabled = (attrs->flags & I915_OVERLAY_DISABLE_DEST_COLORKEY) == 0;
1379
1380         ret = 0;
1381 out_unlock:
1382         mutex_unlock(&dev->struct_mutex);
1383         drm_modeset_unlock_all(dev);
1384
1385         return ret;
1386 }
1387
1388 void intel_setup_overlay(struct drm_i915_private *dev_priv)
1389 {
1390         struct intel_overlay *overlay;
1391         struct drm_i915_gem_object *reg_bo;
1392         struct overlay_registers __iomem *regs;
1393         struct i915_vma *vma = NULL;
1394         int ret;
1395
1396         if (!HAS_OVERLAY(dev_priv))
1397                 return;
1398
1399         overlay = kzalloc(sizeof(*overlay), GFP_KERNEL);
1400         if (!overlay)
1401                 return;
1402
1403         mutex_lock(&dev_priv->drm.struct_mutex);
1404         if (WARN_ON(dev_priv->overlay))
1405                 goto out_free;
1406
1407         overlay->i915 = dev_priv;
1408
1409         reg_bo = NULL;
1410         if (!OVERLAY_NEEDS_PHYSICAL(dev_priv))
1411                 reg_bo = i915_gem_object_create_stolen(dev_priv, PAGE_SIZE);
1412         if (reg_bo == NULL)
1413                 reg_bo = i915_gem_object_create(dev_priv, PAGE_SIZE);
1414         if (IS_ERR(reg_bo))
1415                 goto out_free;
1416         overlay->reg_bo = reg_bo;
1417
1418         if (OVERLAY_NEEDS_PHYSICAL(dev_priv)) {
1419                 ret = i915_gem_object_attach_phys(reg_bo, PAGE_SIZE);
1420                 if (ret) {
1421                         DRM_ERROR("failed to attach phys overlay regs\n");
1422                         goto out_free_bo;
1423                 }
1424                 overlay->flip_addr = reg_bo->phys_handle->busaddr;
1425         } else {
1426                 vma = i915_gem_object_ggtt_pin(reg_bo, NULL,
1427                                                0, PAGE_SIZE, PIN_MAPPABLE);
1428                 if (IS_ERR(vma)) {
1429                         DRM_ERROR("failed to pin overlay register bo\n");
1430                         ret = PTR_ERR(vma);
1431                         goto out_free_bo;
1432                 }
1433                 overlay->flip_addr = i915_ggtt_offset(vma);
1434
1435                 ret = i915_gem_object_set_to_gtt_domain(reg_bo, true);
1436                 if (ret) {
1437                         DRM_ERROR("failed to move overlay register bo into the GTT\n");
1438                         goto out_unpin_bo;
1439                 }
1440         }
1441
1442         /* init all values */
1443         overlay->color_key = 0x0101fe;
1444         overlay->color_key_enabled = true;
1445         overlay->brightness = -19;
1446         overlay->contrast = 75;
1447         overlay->saturation = 146;
1448
1449         init_request_active(&overlay->last_flip, NULL);
1450
1451         regs = intel_overlay_map_regs(overlay);
1452         if (!regs)
1453                 goto out_unpin_bo;
1454
1455         memset_io(regs, 0, sizeof(struct overlay_registers));
1456         update_polyphase_filter(regs);
1457         update_reg_attrs(overlay, regs);
1458
1459         intel_overlay_unmap_regs(overlay, regs);
1460
1461         dev_priv->overlay = overlay;
1462         mutex_unlock(&dev_priv->drm.struct_mutex);
1463         DRM_INFO("initialized overlay support\n");
1464         return;
1465
1466 out_unpin_bo:
1467         if (vma)
1468                 i915_vma_unpin(vma);
1469 out_free_bo:
1470         i915_gem_object_put(reg_bo);
1471 out_free:
1472         mutex_unlock(&dev_priv->drm.struct_mutex);
1473         kfree(overlay);
1474         return;
1475 }
1476
1477 void intel_cleanup_overlay(struct drm_i915_private *dev_priv)
1478 {
1479         if (!dev_priv->overlay)
1480                 return;
1481
1482         /* The bo's should be free'd by the generic code already.
1483          * Furthermore modesetting teardown happens beforehand so the
1484          * hardware should be off already */
1485         WARN_ON(dev_priv->overlay->active);
1486
1487         i915_gem_object_put(dev_priv->overlay->reg_bo);
1488         kfree(dev_priv->overlay);
1489 }
1490
1491 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
1492
1493 struct intel_overlay_error_state {
1494         struct overlay_registers regs;
1495         unsigned long base;
1496         u32 dovsta;
1497         u32 isr;
1498 };
1499
1500 static struct overlay_registers __iomem *
1501 intel_overlay_map_regs_atomic(struct intel_overlay *overlay)
1502 {
1503         struct drm_i915_private *dev_priv = overlay->i915;
1504         struct overlay_registers __iomem *regs;
1505
1506         if (OVERLAY_NEEDS_PHYSICAL(dev_priv))
1507                 /* Cast to make sparse happy, but it's wc memory anyway, so
1508                  * equivalent to the wc io mapping on X86. */
1509                 regs = (struct overlay_registers __iomem *)
1510                         overlay->reg_bo->phys_handle->vaddr;
1511         else
1512                 regs = io_mapping_map_atomic_wc(&dev_priv->ggtt.iomap,
1513                                                 overlay->flip_addr);
1514
1515         return regs;
1516 }
1517
1518 static void intel_overlay_unmap_regs_atomic(struct intel_overlay *overlay,
1519                                         struct overlay_registers __iomem *regs)
1520 {
1521         if (!OVERLAY_NEEDS_PHYSICAL(overlay->i915))
1522                 io_mapping_unmap_atomic(regs);
1523 }
1524
1525 struct intel_overlay_error_state *
1526 intel_overlay_capture_error_state(struct drm_i915_private *dev_priv)
1527 {
1528         struct intel_overlay *overlay = dev_priv->overlay;
1529         struct intel_overlay_error_state *error;
1530         struct overlay_registers __iomem *regs;
1531
1532         if (!overlay || !overlay->active)
1533                 return NULL;
1534
1535         error = kmalloc(sizeof(*error), GFP_ATOMIC);
1536         if (error == NULL)
1537                 return NULL;
1538
1539         error->dovsta = I915_READ(DOVSTA);
1540         error->isr = I915_READ(ISR);
1541         error->base = overlay->flip_addr;
1542
1543         regs = intel_overlay_map_regs_atomic(overlay);
1544         if (!regs)
1545                 goto err;
1546
1547         memcpy_fromio(&error->regs, regs, sizeof(struct overlay_registers));
1548         intel_overlay_unmap_regs_atomic(overlay, regs);
1549
1550         return error;
1551
1552 err:
1553         kfree(error);
1554         return NULL;
1555 }
1556
1557 void
1558 intel_overlay_print_error_state(struct drm_i915_error_state_buf *m,
1559                                 struct intel_overlay_error_state *error)
1560 {
1561         i915_error_printf(m, "Overlay, status: 0x%08x, interrupt: 0x%08x\n",
1562                           error->dovsta, error->isr);
1563         i915_error_printf(m, "  Register file at 0x%08lx:\n",
1564                           error->base);
1565
1566 #define P(x) i915_error_printf(m, "    " #x ":  0x%08x\n", error->regs.x)
1567         P(OBUF_0Y);
1568         P(OBUF_1Y);
1569         P(OBUF_0U);
1570         P(OBUF_0V);
1571         P(OBUF_1U);
1572         P(OBUF_1V);
1573         P(OSTRIDE);
1574         P(YRGB_VPH);
1575         P(UV_VPH);
1576         P(HORZ_PH);
1577         P(INIT_PHS);
1578         P(DWINPOS);
1579         P(DWINSZ);
1580         P(SWIDTH);
1581         P(SWIDTHSW);
1582         P(SHEIGHT);
1583         P(YRGBSCALE);
1584         P(UVSCALE);
1585         P(OCLRC0);
1586         P(OCLRC1);
1587         P(DCLRKV);
1588         P(DCLRKM);
1589         P(SCLRKVH);
1590         P(SCLRKVL);
1591         P(SCLRKEN);
1592         P(OCONFIG);
1593         P(OCMD);
1594         P(OSTART_0Y);
1595         P(OSTART_1Y);
1596         P(OSTART_0U);
1597         P(OSTART_0V);
1598         P(OSTART_1U);
1599         P(OSTART_1V);
1600         P(OTILEOFF_0Y);
1601         P(OTILEOFF_1Y);
1602         P(OTILEOFF_0U);
1603         P(OTILEOFF_0V);
1604         P(OTILEOFF_1U);
1605         P(OTILEOFF_1V);
1606         P(FASTHSCALE);
1607         P(UVSCALEV);
1608 #undef P
1609 }
1610
1611 #endif