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Backmerge i915 security patches from commit 'ea0b163b13ff' into drm-next
[linux.git] / drivers / gpu / drm / i915 / display / 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
29 #include <drm/drm_fourcc.h>
30 #include <drm/i915_drm.h>
31
32 #include "gem/i915_gem_pm.h"
33 #include "gt/intel_ring.h"
34
35 #include "i915_drv.h"
36 #include "i915_reg.h"
37 #include "intel_display_types.h"
38 #include "intel_frontbuffer.h"
39 #include "intel_overlay.h"
40
41 /* Limits for overlay size. According to intel doc, the real limits are:
42  * Y width: 4095, UV width (planar): 2047, Y height: 2047,
43  * UV width (planar): * 1023. But the xorg thinks 2048 for height and width. Use
44  * the mininum of both.  */
45 #define IMAGE_MAX_WIDTH         2048
46 #define IMAGE_MAX_HEIGHT        2046 /* 2 * 1023 */
47 /* on 830 and 845 these large limits result in the card hanging */
48 #define IMAGE_MAX_WIDTH_LEGACY  1024
49 #define IMAGE_MAX_HEIGHT_LEGACY 1088
50
51 /* overlay register definitions */
52 /* OCMD register */
53 #define OCMD_TILED_SURFACE      (0x1<<19)
54 #define OCMD_MIRROR_MASK        (0x3<<17)
55 #define OCMD_MIRROR_MODE        (0x3<<17)
56 #define OCMD_MIRROR_HORIZONTAL  (0x1<<17)
57 #define OCMD_MIRROR_VERTICAL    (0x2<<17)
58 #define OCMD_MIRROR_BOTH        (0x3<<17)
59 #define OCMD_BYTEORDER_MASK     (0x3<<14) /* zero for YUYV or FOURCC YUY2 */
60 #define OCMD_UV_SWAP            (0x1<<14) /* YVYU */
61 #define OCMD_Y_SWAP             (0x2<<14) /* UYVY or FOURCC UYVY */
62 #define OCMD_Y_AND_UV_SWAP      (0x3<<14) /* VYUY */
63 #define OCMD_SOURCE_FORMAT_MASK (0xf<<10)
64 #define OCMD_RGB_888            (0x1<<10) /* not in i965 Intel docs */
65 #define OCMD_RGB_555            (0x2<<10) /* not in i965 Intel docs */
66 #define OCMD_RGB_565            (0x3<<10) /* not in i965 Intel docs */
67 #define OCMD_YUV_422_PACKED     (0x8<<10)
68 #define OCMD_YUV_411_PACKED     (0x9<<10) /* not in i965 Intel docs */
69 #define OCMD_YUV_420_PLANAR     (0xc<<10)
70 #define OCMD_YUV_422_PLANAR     (0xd<<10)
71 #define OCMD_YUV_410_PLANAR     (0xe<<10) /* also 411 */
72 #define OCMD_TVSYNCFLIP_PARITY  (0x1<<9)
73 #define OCMD_TVSYNCFLIP_ENABLE  (0x1<<7)
74 #define OCMD_BUF_TYPE_MASK      (0x1<<5)
75 #define OCMD_BUF_TYPE_FRAME     (0x0<<5)
76 #define OCMD_BUF_TYPE_FIELD     (0x1<<5)
77 #define OCMD_TEST_MODE          (0x1<<4)
78 #define OCMD_BUFFER_SELECT      (0x3<<2)
79 #define OCMD_BUFFER0            (0x0<<2)
80 #define OCMD_BUFFER1            (0x1<<2)
81 #define OCMD_FIELD_SELECT       (0x1<<2)
82 #define OCMD_FIELD0             (0x0<<1)
83 #define OCMD_FIELD1             (0x1<<1)
84 #define OCMD_ENABLE             (0x1<<0)
85
86 /* OCONFIG register */
87 #define OCONF_PIPE_MASK         (0x1<<18)
88 #define OCONF_PIPE_A            (0x0<<18)
89 #define OCONF_PIPE_B            (0x1<<18)
90 #define OCONF_GAMMA2_ENABLE     (0x1<<16)
91 #define OCONF_CSC_MODE_BT601    (0x0<<5)
92 #define OCONF_CSC_MODE_BT709    (0x1<<5)
93 #define OCONF_CSC_BYPASS        (0x1<<4)
94 #define OCONF_CC_OUT_8BIT       (0x1<<3)
95 #define OCONF_TEST_MODE         (0x1<<2)
96 #define OCONF_THREE_LINE_BUFFER (0x1<<0)
97 #define OCONF_TWO_LINE_BUFFER   (0x0<<0)
98
99 /* DCLRKM (dst-key) register */
100 #define DST_KEY_ENABLE          (0x1<<31)
101 #define CLK_RGB24_MASK          0x0
102 #define CLK_RGB16_MASK          0x070307
103 #define CLK_RGB15_MASK          0x070707
104 #define CLK_RGB8I_MASK          0xffffff
105
106 #define RGB16_TO_COLORKEY(c) \
107         (((c & 0xF800) << 8) | ((c & 0x07E0) << 5) | ((c & 0x001F) << 3))
108 #define RGB15_TO_COLORKEY(c) \
109         (((c & 0x7c00) << 9) | ((c & 0x03E0) << 6) | ((c & 0x001F) << 3))
110
111 /* overlay flip addr flag */
112 #define OFC_UPDATE              0x1
113
114 /* polyphase filter coefficients */
115 #define N_HORIZ_Y_TAPS          5
116 #define N_VERT_Y_TAPS           3
117 #define N_HORIZ_UV_TAPS         3
118 #define N_VERT_UV_TAPS          3
119 #define N_PHASES                17
120 #define MAX_TAPS                5
121
122 /* memory bufferd overlay registers */
123 struct overlay_registers {
124         u32 OBUF_0Y;
125         u32 OBUF_1Y;
126         u32 OBUF_0U;
127         u32 OBUF_0V;
128         u32 OBUF_1U;
129         u32 OBUF_1V;
130         u32 OSTRIDE;
131         u32 YRGB_VPH;
132         u32 UV_VPH;
133         u32 HORZ_PH;
134         u32 INIT_PHS;
135         u32 DWINPOS;
136         u32 DWINSZ;
137         u32 SWIDTH;
138         u32 SWIDTHSW;
139         u32 SHEIGHT;
140         u32 YRGBSCALE;
141         u32 UVSCALE;
142         u32 OCLRC0;
143         u32 OCLRC1;
144         u32 DCLRKV;
145         u32 DCLRKM;
146         u32 SCLRKVH;
147         u32 SCLRKVL;
148         u32 SCLRKEN;
149         u32 OCONFIG;
150         u32 OCMD;
151         u32 RESERVED1; /* 0x6C */
152         u32 OSTART_0Y;
153         u32 OSTART_1Y;
154         u32 OSTART_0U;
155         u32 OSTART_0V;
156         u32 OSTART_1U;
157         u32 OSTART_1V;
158         u32 OTILEOFF_0Y;
159         u32 OTILEOFF_1Y;
160         u32 OTILEOFF_0U;
161         u32 OTILEOFF_0V;
162         u32 OTILEOFF_1U;
163         u32 OTILEOFF_1V;
164         u32 FASTHSCALE; /* 0xA0 */
165         u32 UVSCALEV; /* 0xA4 */
166         u32 RESERVEDC[(0x200 - 0xA8) / 4]; /* 0xA8 - 0x1FC */
167         u16 Y_VCOEFS[N_VERT_Y_TAPS * N_PHASES]; /* 0x200 */
168         u16 RESERVEDD[0x100 / 2 - N_VERT_Y_TAPS * N_PHASES];
169         u16 Y_HCOEFS[N_HORIZ_Y_TAPS * N_PHASES]; /* 0x300 */
170         u16 RESERVEDE[0x200 / 2 - N_HORIZ_Y_TAPS * N_PHASES];
171         u16 UV_VCOEFS[N_VERT_UV_TAPS * N_PHASES]; /* 0x500 */
172         u16 RESERVEDF[0x100 / 2 - N_VERT_UV_TAPS * N_PHASES];
173         u16 UV_HCOEFS[N_HORIZ_UV_TAPS * N_PHASES]; /* 0x600 */
174         u16 RESERVEDG[0x100 / 2 - N_HORIZ_UV_TAPS * N_PHASES];
175 };
176
177 struct intel_overlay {
178         struct drm_i915_private *i915;
179         struct intel_context *context;
180         struct intel_crtc *crtc;
181         struct i915_vma *vma;
182         struct i915_vma *old_vma;
183         bool active;
184         bool pfit_active;
185         u32 pfit_vscale_ratio; /* shifted-point number, (1<<12) == 1.0 */
186         u32 color_key:24;
187         u32 color_key_enabled:1;
188         u32 brightness, contrast, saturation;
189         u32 old_xscale, old_yscale;
190         /* register access */
191         struct drm_i915_gem_object *reg_bo;
192         struct overlay_registers __iomem *regs;
193         u32 flip_addr;
194         /* flip handling */
195         struct i915_active last_flip;
196         void (*flip_complete)(struct intel_overlay *ovl);
197 };
198
199 static void i830_overlay_clock_gating(struct drm_i915_private *dev_priv,
200                                       bool enable)
201 {
202         struct pci_dev *pdev = dev_priv->drm.pdev;
203         u8 val;
204
205         /* WA_OVERLAY_CLKGATE:alm */
206         if (enable)
207                 I915_WRITE(DSPCLK_GATE_D, 0);
208         else
209                 I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE);
210
211         /* WA_DISABLE_L2CACHE_CLOCK_GATING:alm */
212         pci_bus_read_config_byte(pdev->bus,
213                                  PCI_DEVFN(0, 0), I830_CLOCK_GATE, &val);
214         if (enable)
215                 val &= ~I830_L2_CACHE_CLOCK_GATE_DISABLE;
216         else
217                 val |= I830_L2_CACHE_CLOCK_GATE_DISABLE;
218         pci_bus_write_config_byte(pdev->bus,
219                                   PCI_DEVFN(0, 0), I830_CLOCK_GATE, val);
220 }
221
222 static struct i915_request *
223 alloc_request(struct intel_overlay *overlay, void (*fn)(struct intel_overlay *))
224 {
225         struct i915_request *rq;
226         int err;
227
228         overlay->flip_complete = fn;
229
230         rq = i915_request_create(overlay->context);
231         if (IS_ERR(rq))
232                 return rq;
233
234         err = i915_active_add_request(&overlay->last_flip, rq);
235         if (err) {
236                 i915_request_add(rq);
237                 return ERR_PTR(err);
238         }
239
240         return rq;
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, NULL);
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         i915_request_add(rq);
274
275         return i915_active_wait(&overlay->last_flip);
276 }
277
278 static void intel_overlay_flip_prepare(struct intel_overlay *overlay,
279                                        struct i915_vma *vma)
280 {
281         enum pipe pipe = overlay->crtc->pipe;
282
283         WARN_ON(overlay->old_vma);
284
285         intel_frontbuffer_track(overlay->vma ? overlay->vma->obj->frontbuffer : NULL,
286                                 vma ? vma->obj->frontbuffer : NULL,
287                                 INTEL_FRONTBUFFER_OVERLAY(pipe));
288
289         intel_frontbuffer_flip_prepare(overlay->i915,
290                                        INTEL_FRONTBUFFER_OVERLAY(pipe));
291
292         overlay->old_vma = overlay->vma;
293         if (vma)
294                 overlay->vma = i915_vma_get(vma);
295         else
296                 overlay->vma = NULL;
297 }
298
299 /* overlay needs to be enabled in OCMD reg */
300 static int intel_overlay_continue(struct intel_overlay *overlay,
301                                   struct i915_vma *vma,
302                                   bool load_polyphase_filter)
303 {
304         struct drm_i915_private *dev_priv = overlay->i915;
305         struct i915_request *rq;
306         u32 flip_addr = overlay->flip_addr;
307         u32 tmp, *cs;
308
309         WARN_ON(!overlay->active);
310
311         if (load_polyphase_filter)
312                 flip_addr |= OFC_UPDATE;
313
314         /* check for underruns */
315         tmp = I915_READ(DOVSTA);
316         if (tmp & (1 << 17))
317                 DRM_DEBUG("overlay underrun, DOVSTA: %x\n", tmp);
318
319         rq = alloc_request(overlay, NULL);
320         if (IS_ERR(rq))
321                 return PTR_ERR(rq);
322
323         cs = intel_ring_begin(rq, 2);
324         if (IS_ERR(cs)) {
325                 i915_request_add(rq);
326                 return PTR_ERR(cs);
327         }
328
329         *cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE;
330         *cs++ = flip_addr;
331         intel_ring_advance(rq, cs);
332
333         intel_overlay_flip_prepare(overlay, vma);
334         i915_request_add(rq);
335
336         return 0;
337 }
338
339 static void intel_overlay_release_old_vma(struct intel_overlay *overlay)
340 {
341         struct i915_vma *vma;
342
343         vma = fetch_and_zero(&overlay->old_vma);
344         if (WARN_ON(!vma))
345                 return;
346
347         intel_frontbuffer_flip_complete(overlay->i915,
348                                         INTEL_FRONTBUFFER_OVERLAY(overlay->crtc->pipe));
349
350         i915_gem_object_unpin_from_display_plane(vma);
351         i915_vma_put(vma);
352 }
353
354 static void
355 intel_overlay_release_old_vid_tail(struct intel_overlay *overlay)
356 {
357         intel_overlay_release_old_vma(overlay);
358 }
359
360 static void intel_overlay_off_tail(struct intel_overlay *overlay)
361 {
362         struct drm_i915_private *dev_priv = overlay->i915;
363
364         intel_overlay_release_old_vma(overlay);
365
366         overlay->crtc->overlay = NULL;
367         overlay->crtc = NULL;
368         overlay->active = false;
369
370         if (IS_I830(dev_priv))
371                 i830_overlay_clock_gating(dev_priv, true);
372 }
373
374 static void
375 intel_overlay_last_flip_retire(struct i915_active *active)
376 {
377         struct intel_overlay *overlay =
378                 container_of(active, typeof(*overlay), last_flip);
379
380         if (overlay->flip_complete)
381                 overlay->flip_complete(overlay);
382 }
383
384 /* overlay needs to be disabled in OCMD reg */
385 static int intel_overlay_off(struct intel_overlay *overlay)
386 {
387         struct i915_request *rq;
388         u32 *cs, flip_addr = overlay->flip_addr;
389
390         WARN_ON(!overlay->active);
391
392         /* According to intel docs the overlay hw may hang (when switching
393          * off) without loading the filter coeffs. It is however unclear whether
394          * this applies to the disabling of the overlay or to the switching off
395          * of the hw. Do it in both cases */
396         flip_addr |= OFC_UPDATE;
397
398         rq = alloc_request(overlay, intel_overlay_off_tail);
399         if (IS_ERR(rq))
400                 return PTR_ERR(rq);
401
402         cs = intel_ring_begin(rq, 6);
403         if (IS_ERR(cs)) {
404                 i915_request_add(rq);
405                 return PTR_ERR(cs);
406         }
407
408         /* wait for overlay to go idle */
409         *cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE;
410         *cs++ = flip_addr;
411         *cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
412
413         /* turn overlay off */
414         *cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_OFF;
415         *cs++ = flip_addr;
416         *cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
417
418         intel_ring_advance(rq, cs);
419
420         intel_overlay_flip_prepare(overlay, NULL);
421         i915_request_add(rq);
422
423         return i915_active_wait(&overlay->last_flip);
424 }
425
426 /* recover from an interruption due to a signal
427  * We have to be careful not to repeat work forever an make forward progess. */
428 static int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay)
429 {
430         return i915_active_wait(&overlay->last_flip);
431 }
432
433 /* Wait for pending overlay flip and release old frame.
434  * Needs to be called before the overlay register are changed
435  * via intel_overlay_(un)map_regs
436  */
437 static int intel_overlay_release_old_vid(struct intel_overlay *overlay)
438 {
439         struct drm_i915_private *dev_priv = overlay->i915;
440         struct i915_request *rq;
441         u32 *cs;
442
443         /*
444          * Only wait if there is actually an old frame to release to
445          * guarantee forward progress.
446          */
447         if (!overlay->old_vma)
448                 return 0;
449
450         if (!(I915_READ(GEN2_ISR) & I915_OVERLAY_PLANE_FLIP_PENDING_INTERRUPT)) {
451                 intel_overlay_release_old_vid_tail(overlay);
452                 return 0;
453         }
454
455         rq = alloc_request(overlay, intel_overlay_release_old_vid_tail);
456         if (IS_ERR(rq))
457                 return PTR_ERR(rq);
458
459         cs = intel_ring_begin(rq, 2);
460         if (IS_ERR(cs)) {
461                 i915_request_add(rq);
462                 return PTR_ERR(cs);
463         }
464
465         *cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
466         *cs++ = MI_NOOP;
467         intel_ring_advance(rq, cs);
468
469         i915_request_add(rq);
470
471         return i915_active_wait(&overlay->last_flip);
472 }
473
474 void intel_overlay_reset(struct drm_i915_private *dev_priv)
475 {
476         struct intel_overlay *overlay = dev_priv->overlay;
477
478         if (!overlay)
479                 return;
480
481         overlay->old_xscale = 0;
482         overlay->old_yscale = 0;
483         overlay->crtc = NULL;
484         overlay->active = false;
485 }
486
487 static int packed_depth_bytes(u32 format)
488 {
489         switch (format & I915_OVERLAY_DEPTH_MASK) {
490         case I915_OVERLAY_YUV422:
491                 return 4;
492         case I915_OVERLAY_YUV411:
493                 /* return 6; not implemented */
494         default:
495                 return -EINVAL;
496         }
497 }
498
499 static int packed_width_bytes(u32 format, short width)
500 {
501         switch (format & I915_OVERLAY_DEPTH_MASK) {
502         case I915_OVERLAY_YUV422:
503                 return width << 1;
504         default:
505                 return -EINVAL;
506         }
507 }
508
509 static int uv_hsubsampling(u32 format)
510 {
511         switch (format & I915_OVERLAY_DEPTH_MASK) {
512         case I915_OVERLAY_YUV422:
513         case I915_OVERLAY_YUV420:
514                 return 2;
515         case I915_OVERLAY_YUV411:
516         case I915_OVERLAY_YUV410:
517                 return 4;
518         default:
519                 return -EINVAL;
520         }
521 }
522
523 static int uv_vsubsampling(u32 format)
524 {
525         switch (format & I915_OVERLAY_DEPTH_MASK) {
526         case I915_OVERLAY_YUV420:
527         case I915_OVERLAY_YUV410:
528                 return 2;
529         case I915_OVERLAY_YUV422:
530         case I915_OVERLAY_YUV411:
531                 return 1;
532         default:
533                 return -EINVAL;
534         }
535 }
536
537 static u32 calc_swidthsw(struct drm_i915_private *dev_priv, u32 offset, u32 width)
538 {
539         u32 sw;
540
541         if (IS_GEN(dev_priv, 2))
542                 sw = ALIGN((offset & 31) + width, 32);
543         else
544                 sw = ALIGN((offset & 63) + width, 64);
545
546         if (sw == 0)
547                 return 0;
548
549         return (sw - 32) >> 3;
550 }
551
552 static const u16 y_static_hcoeffs[N_PHASES][N_HORIZ_Y_TAPS] = {
553         [ 0] = { 0x3000, 0xb4a0, 0x1930, 0x1920, 0xb4a0, },
554         [ 1] = { 0x3000, 0xb500, 0x19d0, 0x1880, 0xb440, },
555         [ 2] = { 0x3000, 0xb540, 0x1a88, 0x2f80, 0xb3e0, },
556         [ 3] = { 0x3000, 0xb580, 0x1b30, 0x2e20, 0xb380, },
557         [ 4] = { 0x3000, 0xb5c0, 0x1bd8, 0x2cc0, 0xb320, },
558         [ 5] = { 0x3020, 0xb5e0, 0x1c60, 0x2b80, 0xb2c0, },
559         [ 6] = { 0x3020, 0xb5e0, 0x1cf8, 0x2a20, 0xb260, },
560         [ 7] = { 0x3020, 0xb5e0, 0x1d80, 0x28e0, 0xb200, },
561         [ 8] = { 0x3020, 0xb5c0, 0x1e08, 0x3f40, 0xb1c0, },
562         [ 9] = { 0x3020, 0xb580, 0x1e78, 0x3ce0, 0xb160, },
563         [10] = { 0x3040, 0xb520, 0x1ed8, 0x3aa0, 0xb120, },
564         [11] = { 0x3040, 0xb4a0, 0x1f30, 0x3880, 0xb0e0, },
565         [12] = { 0x3040, 0xb400, 0x1f78, 0x3680, 0xb0a0, },
566         [13] = { 0x3020, 0xb340, 0x1fb8, 0x34a0, 0xb060, },
567         [14] = { 0x3020, 0xb240, 0x1fe0, 0x32e0, 0xb040, },
568         [15] = { 0x3020, 0xb140, 0x1ff8, 0x3160, 0xb020, },
569         [16] = { 0xb000, 0x3000, 0x0800, 0x3000, 0xb000, },
570 };
571
572 static const u16 uv_static_hcoeffs[N_PHASES][N_HORIZ_UV_TAPS] = {
573         [ 0] = { 0x3000, 0x1800, 0x1800, },
574         [ 1] = { 0xb000, 0x18d0, 0x2e60, },
575         [ 2] = { 0xb000, 0x1990, 0x2ce0, },
576         [ 3] = { 0xb020, 0x1a68, 0x2b40, },
577         [ 4] = { 0xb040, 0x1b20, 0x29e0, },
578         [ 5] = { 0xb060, 0x1bd8, 0x2880, },
579         [ 6] = { 0xb080, 0x1c88, 0x3e60, },
580         [ 7] = { 0xb0a0, 0x1d28, 0x3c00, },
581         [ 8] = { 0xb0c0, 0x1db8, 0x39e0, },
582         [ 9] = { 0xb0e0, 0x1e40, 0x37e0, },
583         [10] = { 0xb100, 0x1eb8, 0x3620, },
584         [11] = { 0xb100, 0x1f18, 0x34a0, },
585         [12] = { 0xb100, 0x1f68, 0x3360, },
586         [13] = { 0xb0e0, 0x1fa8, 0x3240, },
587         [14] = { 0xb0c0, 0x1fe0, 0x3140, },
588         [15] = { 0xb060, 0x1ff0, 0x30a0, },
589         [16] = { 0x3000, 0x0800, 0x3000, },
590 };
591
592 static void update_polyphase_filter(struct overlay_registers __iomem *regs)
593 {
594         memcpy_toio(regs->Y_HCOEFS, y_static_hcoeffs, sizeof(y_static_hcoeffs));
595         memcpy_toio(regs->UV_HCOEFS, uv_static_hcoeffs,
596                     sizeof(uv_static_hcoeffs));
597 }
598
599 static bool update_scaling_factors(struct intel_overlay *overlay,
600                                    struct overlay_registers __iomem *regs,
601                                    struct drm_intel_overlay_put_image *params)
602 {
603         /* fixed point with a 12 bit shift */
604         u32 xscale, yscale, xscale_UV, yscale_UV;
605 #define FP_SHIFT 12
606 #define FRACT_MASK 0xfff
607         bool scale_changed = false;
608         int uv_hscale = uv_hsubsampling(params->flags);
609         int uv_vscale = uv_vsubsampling(params->flags);
610
611         if (params->dst_width > 1)
612                 xscale = ((params->src_scan_width - 1) << FP_SHIFT) /
613                         params->dst_width;
614         else
615                 xscale = 1 << FP_SHIFT;
616
617         if (params->dst_height > 1)
618                 yscale = ((params->src_scan_height - 1) << FP_SHIFT) /
619                         params->dst_height;
620         else
621                 yscale = 1 << FP_SHIFT;
622
623         /*if (params->format & I915_OVERLAY_YUV_PLANAR) {*/
624         xscale_UV = xscale/uv_hscale;
625         yscale_UV = yscale/uv_vscale;
626         /* make the Y scale to UV scale ratio an exact multiply */
627         xscale = xscale_UV * uv_hscale;
628         yscale = yscale_UV * uv_vscale;
629         /*} else {
630           xscale_UV = 0;
631           yscale_UV = 0;
632           }*/
633
634         if (xscale != overlay->old_xscale || yscale != overlay->old_yscale)
635                 scale_changed = true;
636         overlay->old_xscale = xscale;
637         overlay->old_yscale = yscale;
638
639         iowrite32(((yscale & FRACT_MASK) << 20) |
640                   ((xscale >> FP_SHIFT)  << 16) |
641                   ((xscale & FRACT_MASK) << 3),
642                  &regs->YRGBSCALE);
643
644         iowrite32(((yscale_UV & FRACT_MASK) << 20) |
645                   ((xscale_UV >> FP_SHIFT)  << 16) |
646                   ((xscale_UV & FRACT_MASK) << 3),
647                  &regs->UVSCALE);
648
649         iowrite32((((yscale    >> FP_SHIFT) << 16) |
650                    ((yscale_UV >> FP_SHIFT) << 0)),
651                  &regs->UVSCALEV);
652
653         if (scale_changed)
654                 update_polyphase_filter(regs);
655
656         return scale_changed;
657 }
658
659 static void update_colorkey(struct intel_overlay *overlay,
660                             struct overlay_registers __iomem *regs)
661 {
662         const struct intel_plane_state *state =
663                 to_intel_plane_state(overlay->crtc->base.primary->state);
664         u32 key = overlay->color_key;
665         u32 format = 0;
666         u32 flags = 0;
667
668         if (overlay->color_key_enabled)
669                 flags |= DST_KEY_ENABLE;
670
671         if (state->base.visible)
672                 format = state->base.fb->format->format;
673
674         switch (format) {
675         case DRM_FORMAT_C8:
676                 key = 0;
677                 flags |= CLK_RGB8I_MASK;
678                 break;
679         case DRM_FORMAT_XRGB1555:
680                 key = RGB15_TO_COLORKEY(key);
681                 flags |= CLK_RGB15_MASK;
682                 break;
683         case DRM_FORMAT_RGB565:
684                 key = RGB16_TO_COLORKEY(key);
685                 flags |= CLK_RGB16_MASK;
686                 break;
687         default:
688                 flags |= CLK_RGB24_MASK;
689                 break;
690         }
691
692         iowrite32(key, &regs->DCLRKV);
693         iowrite32(flags, &regs->DCLRKM);
694 }
695
696 static u32 overlay_cmd_reg(struct drm_intel_overlay_put_image *params)
697 {
698         u32 cmd = OCMD_ENABLE | OCMD_BUF_TYPE_FRAME | OCMD_BUFFER0;
699
700         if (params->flags & I915_OVERLAY_YUV_PLANAR) {
701                 switch (params->flags & I915_OVERLAY_DEPTH_MASK) {
702                 case I915_OVERLAY_YUV422:
703                         cmd |= OCMD_YUV_422_PLANAR;
704                         break;
705                 case I915_OVERLAY_YUV420:
706                         cmd |= OCMD_YUV_420_PLANAR;
707                         break;
708                 case I915_OVERLAY_YUV411:
709                 case I915_OVERLAY_YUV410:
710                         cmd |= OCMD_YUV_410_PLANAR;
711                         break;
712                 }
713         } else { /* YUV packed */
714                 switch (params->flags & I915_OVERLAY_DEPTH_MASK) {
715                 case I915_OVERLAY_YUV422:
716                         cmd |= OCMD_YUV_422_PACKED;
717                         break;
718                 case I915_OVERLAY_YUV411:
719                         cmd |= OCMD_YUV_411_PACKED;
720                         break;
721                 }
722
723                 switch (params->flags & I915_OVERLAY_SWAP_MASK) {
724                 case I915_OVERLAY_NO_SWAP:
725                         break;
726                 case I915_OVERLAY_UV_SWAP:
727                         cmd |= OCMD_UV_SWAP;
728                         break;
729                 case I915_OVERLAY_Y_SWAP:
730                         cmd |= OCMD_Y_SWAP;
731                         break;
732                 case I915_OVERLAY_Y_AND_UV_SWAP:
733                         cmd |= OCMD_Y_AND_UV_SWAP;
734                         break;
735                 }
736         }
737
738         return cmd;
739 }
740
741 static int intel_overlay_do_put_image(struct intel_overlay *overlay,
742                                       struct drm_i915_gem_object *new_bo,
743                                       struct drm_intel_overlay_put_image *params)
744 {
745         struct overlay_registers __iomem *regs = overlay->regs;
746         struct drm_i915_private *dev_priv = overlay->i915;
747         u32 swidth, swidthsw, sheight, ostride;
748         enum pipe pipe = overlay->crtc->pipe;
749         bool scale_changed = false;
750         struct i915_vma *vma;
751         int ret, tmp_width;
752
753         WARN_ON(!drm_modeset_is_locked(&dev_priv->drm.mode_config.connection_mutex));
754
755         ret = intel_overlay_release_old_vid(overlay);
756         if (ret != 0)
757                 return ret;
758
759         atomic_inc(&dev_priv->gpu_error.pending_fb_pin);
760
761         i915_gem_object_lock(new_bo);
762         vma = i915_gem_object_pin_to_display_plane(new_bo,
763                                                    0, NULL, PIN_MAPPABLE);
764         i915_gem_object_unlock(new_bo);
765         if (IS_ERR(vma)) {
766                 ret = PTR_ERR(vma);
767                 goto out_pin_section;
768         }
769         intel_frontbuffer_flush(new_bo->frontbuffer, ORIGIN_DIRTYFB);
770
771         if (!overlay->active) {
772                 u32 oconfig;
773
774                 oconfig = OCONF_CC_OUT_8BIT;
775                 if (IS_GEN(dev_priv, 4))
776                         oconfig |= OCONF_CSC_MODE_BT709;
777                 oconfig |= pipe == 0 ?
778                         OCONF_PIPE_A : OCONF_PIPE_B;
779                 iowrite32(oconfig, &regs->OCONFIG);
780
781                 ret = intel_overlay_on(overlay);
782                 if (ret != 0)
783                         goto out_unpin;
784         }
785
786         iowrite32(params->dst_y << 16 | params->dst_x, &regs->DWINPOS);
787         iowrite32(params->dst_height << 16 | params->dst_width, &regs->DWINSZ);
788
789         if (params->flags & I915_OVERLAY_YUV_PACKED)
790                 tmp_width = packed_width_bytes(params->flags,
791                                                params->src_width);
792         else
793                 tmp_width = params->src_width;
794
795         swidth = params->src_width;
796         swidthsw = calc_swidthsw(dev_priv, params->offset_Y, tmp_width);
797         sheight = params->src_height;
798         iowrite32(i915_ggtt_offset(vma) + params->offset_Y, &regs->OBUF_0Y);
799         ostride = params->stride_Y;
800
801         if (params->flags & I915_OVERLAY_YUV_PLANAR) {
802                 int uv_hscale = uv_hsubsampling(params->flags);
803                 int uv_vscale = uv_vsubsampling(params->flags);
804                 u32 tmp_U, tmp_V;
805
806                 swidth |= (params->src_width / uv_hscale) << 16;
807                 sheight |= (params->src_height / uv_vscale) << 16;
808
809                 tmp_U = calc_swidthsw(dev_priv, params->offset_U,
810                                       params->src_width / uv_hscale);
811                 tmp_V = calc_swidthsw(dev_priv, params->offset_V,
812                                       params->src_width / uv_hscale);
813                 swidthsw |= max(tmp_U, tmp_V) << 16;
814
815                 iowrite32(i915_ggtt_offset(vma) + params->offset_U,
816                           &regs->OBUF_0U);
817                 iowrite32(i915_ggtt_offset(vma) + params->offset_V,
818                           &regs->OBUF_0V);
819
820                 ostride |= params->stride_UV << 16;
821         }
822
823         iowrite32(swidth, &regs->SWIDTH);
824         iowrite32(swidthsw, &regs->SWIDTHSW);
825         iowrite32(sheight, &regs->SHEIGHT);
826         iowrite32(ostride, &regs->OSTRIDE);
827
828         scale_changed = update_scaling_factors(overlay, regs, params);
829
830         update_colorkey(overlay, regs);
831
832         iowrite32(overlay_cmd_reg(params), &regs->OCMD);
833
834         ret = intel_overlay_continue(overlay, vma, scale_changed);
835         if (ret)
836                 goto out_unpin;
837
838         return 0;
839
840 out_unpin:
841         i915_gem_object_unpin_from_display_plane(vma);
842 out_pin_section:
843         atomic_dec(&dev_priv->gpu_error.pending_fb_pin);
844
845         return ret;
846 }
847
848 int intel_overlay_switch_off(struct intel_overlay *overlay)
849 {
850         struct drm_i915_private *dev_priv = overlay->i915;
851         int ret;
852
853         WARN_ON(!drm_modeset_is_locked(&dev_priv->drm.mode_config.connection_mutex));
854
855         ret = intel_overlay_recover_from_interrupt(overlay);
856         if (ret != 0)
857                 return ret;
858
859         if (!overlay->active)
860                 return 0;
861
862         ret = intel_overlay_release_old_vid(overlay);
863         if (ret != 0)
864                 return ret;
865
866         iowrite32(0, &overlay->regs->OCMD);
867
868         return intel_overlay_off(overlay);
869 }
870
871 static int check_overlay_possible_on_crtc(struct intel_overlay *overlay,
872                                           struct intel_crtc *crtc)
873 {
874         if (!crtc->active)
875                 return -EINVAL;
876
877         /* can't use the overlay with double wide pipe */
878         if (crtc->config->double_wide)
879                 return -EINVAL;
880
881         return 0;
882 }
883
884 static void update_pfit_vscale_ratio(struct intel_overlay *overlay)
885 {
886         struct drm_i915_private *dev_priv = overlay->i915;
887         u32 pfit_control = I915_READ(PFIT_CONTROL);
888         u32 ratio;
889
890         /* XXX: This is not the same logic as in the xorg driver, but more in
891          * line with the intel documentation for the i965
892          */
893         if (INTEL_GEN(dev_priv) >= 4) {
894                 /* on i965 use the PGM reg to read out the autoscaler values */
895                 ratio = I915_READ(PFIT_PGM_RATIOS) >> PFIT_VERT_SCALE_SHIFT_965;
896         } else {
897                 if (pfit_control & VERT_AUTO_SCALE)
898                         ratio = I915_READ(PFIT_AUTO_RATIOS);
899                 else
900                         ratio = I915_READ(PFIT_PGM_RATIOS);
901                 ratio >>= PFIT_VERT_SCALE_SHIFT;
902         }
903
904         overlay->pfit_vscale_ratio = ratio;
905 }
906
907 static int check_overlay_dst(struct intel_overlay *overlay,
908                              struct drm_intel_overlay_put_image *rec)
909 {
910         const struct intel_crtc_state *pipe_config =
911                 overlay->crtc->config;
912
913         if (rec->dst_x < pipe_config->pipe_src_w &&
914             rec->dst_x + rec->dst_width <= pipe_config->pipe_src_w &&
915             rec->dst_y < pipe_config->pipe_src_h &&
916             rec->dst_y + rec->dst_height <= pipe_config->pipe_src_h)
917                 return 0;
918         else
919                 return -EINVAL;
920 }
921
922 static int check_overlay_scaling(struct drm_intel_overlay_put_image *rec)
923 {
924         u32 tmp;
925
926         /* downscaling limit is 8.0 */
927         tmp = ((rec->src_scan_height << 16) / rec->dst_height) >> 16;
928         if (tmp > 7)
929                 return -EINVAL;
930
931         tmp = ((rec->src_scan_width << 16) / rec->dst_width) >> 16;
932         if (tmp > 7)
933                 return -EINVAL;
934
935         return 0;
936 }
937
938 static int check_overlay_src(struct drm_i915_private *dev_priv,
939                              struct drm_intel_overlay_put_image *rec,
940                              struct drm_i915_gem_object *new_bo)
941 {
942         int uv_hscale = uv_hsubsampling(rec->flags);
943         int uv_vscale = uv_vsubsampling(rec->flags);
944         u32 stride_mask;
945         int depth;
946         u32 tmp;
947
948         /* check src dimensions */
949         if (IS_I845G(dev_priv) || IS_I830(dev_priv)) {
950                 if (rec->src_height > IMAGE_MAX_HEIGHT_LEGACY ||
951                     rec->src_width  > IMAGE_MAX_WIDTH_LEGACY)
952                         return -EINVAL;
953         } else {
954                 if (rec->src_height > IMAGE_MAX_HEIGHT ||
955                     rec->src_width  > IMAGE_MAX_WIDTH)
956                         return -EINVAL;
957         }
958
959         /* better safe than sorry, use 4 as the maximal subsampling ratio */
960         if (rec->src_height < N_VERT_Y_TAPS*4 ||
961             rec->src_width  < N_HORIZ_Y_TAPS*4)
962                 return -EINVAL;
963
964         /* check alignment constraints */
965         switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
966         case I915_OVERLAY_RGB:
967                 /* not implemented */
968                 return -EINVAL;
969
970         case I915_OVERLAY_YUV_PACKED:
971                 if (uv_vscale != 1)
972                         return -EINVAL;
973
974                 depth = packed_depth_bytes(rec->flags);
975                 if (depth < 0)
976                         return depth;
977
978                 /* ignore UV planes */
979                 rec->stride_UV = 0;
980                 rec->offset_U = 0;
981                 rec->offset_V = 0;
982                 /* check pixel alignment */
983                 if (rec->offset_Y % depth)
984                         return -EINVAL;
985                 break;
986
987         case I915_OVERLAY_YUV_PLANAR:
988                 if (uv_vscale < 0 || uv_hscale < 0)
989                         return -EINVAL;
990                 /* no offset restrictions for planar formats */
991                 break;
992
993         default:
994                 return -EINVAL;
995         }
996
997         if (rec->src_width % uv_hscale)
998                 return -EINVAL;
999
1000         /* stride checking */
1001         if (IS_I830(dev_priv) || IS_I845G(dev_priv))
1002                 stride_mask = 255;
1003         else
1004                 stride_mask = 63;
1005
1006         if (rec->stride_Y & stride_mask || rec->stride_UV & stride_mask)
1007                 return -EINVAL;
1008         if (IS_GEN(dev_priv, 4) && rec->stride_Y < 512)
1009                 return -EINVAL;
1010
1011         tmp = (rec->flags & I915_OVERLAY_TYPE_MASK) == I915_OVERLAY_YUV_PLANAR ?
1012                 4096 : 8192;
1013         if (rec->stride_Y > tmp || rec->stride_UV > 2*1024)
1014                 return -EINVAL;
1015
1016         /* check buffer dimensions */
1017         switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
1018         case I915_OVERLAY_RGB:
1019         case I915_OVERLAY_YUV_PACKED:
1020                 /* always 4 Y values per depth pixels */
1021                 if (packed_width_bytes(rec->flags, rec->src_width) > rec->stride_Y)
1022                         return -EINVAL;
1023
1024                 tmp = rec->stride_Y*rec->src_height;
1025                 if (rec->offset_Y + tmp > new_bo->base.size)
1026                         return -EINVAL;
1027                 break;
1028
1029         case I915_OVERLAY_YUV_PLANAR:
1030                 if (rec->src_width > rec->stride_Y)
1031                         return -EINVAL;
1032                 if (rec->src_width/uv_hscale > rec->stride_UV)
1033                         return -EINVAL;
1034
1035                 tmp = rec->stride_Y * rec->src_height;
1036                 if (rec->offset_Y + tmp > new_bo->base.size)
1037                         return -EINVAL;
1038
1039                 tmp = rec->stride_UV * (rec->src_height / uv_vscale);
1040                 if (rec->offset_U + tmp > new_bo->base.size ||
1041                     rec->offset_V + tmp > new_bo->base.size)
1042                         return -EINVAL;
1043                 break;
1044         }
1045
1046         return 0;
1047 }
1048
1049 int intel_overlay_put_image_ioctl(struct drm_device *dev, void *data,
1050                                   struct drm_file *file_priv)
1051 {
1052         struct drm_intel_overlay_put_image *params = data;
1053         struct drm_i915_private *dev_priv = to_i915(dev);
1054         struct intel_overlay *overlay;
1055         struct drm_crtc *drmmode_crtc;
1056         struct intel_crtc *crtc;
1057         struct drm_i915_gem_object *new_bo;
1058         int ret;
1059
1060         overlay = dev_priv->overlay;
1061         if (!overlay) {
1062                 DRM_DEBUG("userspace bug: no overlay\n");
1063                 return -ENODEV;
1064         }
1065
1066         if (!(params->flags & I915_OVERLAY_ENABLE)) {
1067                 drm_modeset_lock_all(dev);
1068                 ret = intel_overlay_switch_off(overlay);
1069                 drm_modeset_unlock_all(dev);
1070
1071                 return ret;
1072         }
1073
1074         drmmode_crtc = drm_crtc_find(dev, file_priv, params->crtc_id);
1075         if (!drmmode_crtc)
1076                 return -ENOENT;
1077         crtc = to_intel_crtc(drmmode_crtc);
1078
1079         new_bo = i915_gem_object_lookup(file_priv, params->bo_handle);
1080         if (!new_bo)
1081                 return -ENOENT;
1082
1083         drm_modeset_lock_all(dev);
1084
1085         if (i915_gem_object_is_tiled(new_bo)) {
1086                 DRM_DEBUG_KMS("buffer used for overlay image can not be tiled\n");
1087                 ret = -EINVAL;
1088                 goto out_unlock;
1089         }
1090
1091         ret = intel_overlay_recover_from_interrupt(overlay);
1092         if (ret != 0)
1093                 goto out_unlock;
1094
1095         if (overlay->crtc != crtc) {
1096                 ret = intel_overlay_switch_off(overlay);
1097                 if (ret != 0)
1098                         goto out_unlock;
1099
1100                 ret = check_overlay_possible_on_crtc(overlay, crtc);
1101                 if (ret != 0)
1102                         goto out_unlock;
1103
1104                 overlay->crtc = crtc;
1105                 crtc->overlay = overlay;
1106
1107                 /* line too wide, i.e. one-line-mode */
1108                 if (crtc->config->pipe_src_w > 1024 &&
1109                     crtc->config->gmch_pfit.control & PFIT_ENABLE) {
1110                         overlay->pfit_active = true;
1111                         update_pfit_vscale_ratio(overlay);
1112                 } else
1113                         overlay->pfit_active = false;
1114         }
1115
1116         ret = check_overlay_dst(overlay, params);
1117         if (ret != 0)
1118                 goto out_unlock;
1119
1120         if (overlay->pfit_active) {
1121                 params->dst_y = (((u32)params->dst_y << 12) /
1122                                  overlay->pfit_vscale_ratio);
1123                 /* shifting right rounds downwards, so add 1 */
1124                 params->dst_height = (((u32)params->dst_height << 12) /
1125                                  overlay->pfit_vscale_ratio) + 1;
1126         }
1127
1128         if (params->src_scan_height > params->src_height ||
1129             params->src_scan_width > params->src_width) {
1130                 ret = -EINVAL;
1131                 goto out_unlock;
1132         }
1133
1134         ret = check_overlay_src(dev_priv, params, new_bo);
1135         if (ret != 0)
1136                 goto out_unlock;
1137
1138         /* Check scaling after src size to prevent a divide-by-zero. */
1139         ret = check_overlay_scaling(params);
1140         if (ret != 0)
1141                 goto out_unlock;
1142
1143         ret = intel_overlay_do_put_image(overlay, new_bo, params);
1144         if (ret != 0)
1145                 goto out_unlock;
1146
1147         drm_modeset_unlock_all(dev);
1148         i915_gem_object_put(new_bo);
1149
1150         return 0;
1151
1152 out_unlock:
1153         drm_modeset_unlock_all(dev);
1154         i915_gem_object_put(new_bo);
1155
1156         return ret;
1157 }
1158
1159 static void update_reg_attrs(struct intel_overlay *overlay,
1160                              struct overlay_registers __iomem *regs)
1161 {
1162         iowrite32((overlay->contrast << 18) | (overlay->brightness & 0xff),
1163                   &regs->OCLRC0);
1164         iowrite32(overlay->saturation, &regs->OCLRC1);
1165 }
1166
1167 static bool check_gamma_bounds(u32 gamma1, u32 gamma2)
1168 {
1169         int i;
1170
1171         if (gamma1 & 0xff000000 || gamma2 & 0xff000000)
1172                 return false;
1173
1174         for (i = 0; i < 3; i++) {
1175                 if (((gamma1 >> i*8) & 0xff) >= ((gamma2 >> i*8) & 0xff))
1176                         return false;
1177         }
1178
1179         return true;
1180 }
1181
1182 static bool check_gamma5_errata(u32 gamma5)
1183 {
1184         int i;
1185
1186         for (i = 0; i < 3; i++) {
1187                 if (((gamma5 >> i*8) & 0xff) == 0x80)
1188                         return false;
1189         }
1190
1191         return true;
1192 }
1193
1194 static int check_gamma(struct drm_intel_overlay_attrs *attrs)
1195 {
1196         if (!check_gamma_bounds(0, attrs->gamma0) ||
1197             !check_gamma_bounds(attrs->gamma0, attrs->gamma1) ||
1198             !check_gamma_bounds(attrs->gamma1, attrs->gamma2) ||
1199             !check_gamma_bounds(attrs->gamma2, attrs->gamma3) ||
1200             !check_gamma_bounds(attrs->gamma3, attrs->gamma4) ||
1201             !check_gamma_bounds(attrs->gamma4, attrs->gamma5) ||
1202             !check_gamma_bounds(attrs->gamma5, 0x00ffffff))
1203                 return -EINVAL;
1204
1205         if (!check_gamma5_errata(attrs->gamma5))
1206                 return -EINVAL;
1207
1208         return 0;
1209 }
1210
1211 int intel_overlay_attrs_ioctl(struct drm_device *dev, void *data,
1212                               struct drm_file *file_priv)
1213 {
1214         struct drm_intel_overlay_attrs *attrs = data;
1215         struct drm_i915_private *dev_priv = to_i915(dev);
1216         struct intel_overlay *overlay;
1217         int ret;
1218
1219         overlay = dev_priv->overlay;
1220         if (!overlay) {
1221                 DRM_DEBUG("userspace bug: no overlay\n");
1222                 return -ENODEV;
1223         }
1224
1225         drm_modeset_lock_all(dev);
1226
1227         ret = -EINVAL;
1228         if (!(attrs->flags & I915_OVERLAY_UPDATE_ATTRS)) {
1229                 attrs->color_key  = overlay->color_key;
1230                 attrs->brightness = overlay->brightness;
1231                 attrs->contrast   = overlay->contrast;
1232                 attrs->saturation = overlay->saturation;
1233
1234                 if (!IS_GEN(dev_priv, 2)) {
1235                         attrs->gamma0 = I915_READ(OGAMC0);
1236                         attrs->gamma1 = I915_READ(OGAMC1);
1237                         attrs->gamma2 = I915_READ(OGAMC2);
1238                         attrs->gamma3 = I915_READ(OGAMC3);
1239                         attrs->gamma4 = I915_READ(OGAMC4);
1240                         attrs->gamma5 = I915_READ(OGAMC5);
1241                 }
1242         } else {
1243                 if (attrs->brightness < -128 || attrs->brightness > 127)
1244                         goto out_unlock;
1245                 if (attrs->contrast > 255)
1246                         goto out_unlock;
1247                 if (attrs->saturation > 1023)
1248                         goto out_unlock;
1249
1250                 overlay->color_key  = attrs->color_key;
1251                 overlay->brightness = attrs->brightness;
1252                 overlay->contrast   = attrs->contrast;
1253                 overlay->saturation = attrs->saturation;
1254
1255                 update_reg_attrs(overlay, overlay->regs);
1256
1257                 if (attrs->flags & I915_OVERLAY_UPDATE_GAMMA) {
1258                         if (IS_GEN(dev_priv, 2))
1259                                 goto out_unlock;
1260
1261                         if (overlay->active) {
1262                                 ret = -EBUSY;
1263                                 goto out_unlock;
1264                         }
1265
1266                         ret = check_gamma(attrs);
1267                         if (ret)
1268                                 goto out_unlock;
1269
1270                         I915_WRITE(OGAMC0, attrs->gamma0);
1271                         I915_WRITE(OGAMC1, attrs->gamma1);
1272                         I915_WRITE(OGAMC2, attrs->gamma2);
1273                         I915_WRITE(OGAMC3, attrs->gamma3);
1274                         I915_WRITE(OGAMC4, attrs->gamma4);
1275                         I915_WRITE(OGAMC5, attrs->gamma5);
1276                 }
1277         }
1278         overlay->color_key_enabled = (attrs->flags & I915_OVERLAY_DISABLE_DEST_COLORKEY) == 0;
1279
1280         ret = 0;
1281 out_unlock:
1282         drm_modeset_unlock_all(dev);
1283
1284         return ret;
1285 }
1286
1287 static int get_registers(struct intel_overlay *overlay, bool use_phys)
1288 {
1289         struct drm_i915_private *i915 = overlay->i915;
1290         struct drm_i915_gem_object *obj;
1291         struct i915_vma *vma;
1292         int err;
1293
1294         obj = i915_gem_object_create_stolen(i915, PAGE_SIZE);
1295         if (IS_ERR(obj))
1296                 obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
1297         if (IS_ERR(obj))
1298                 return PTR_ERR(obj);
1299
1300         vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, PIN_MAPPABLE);
1301         if (IS_ERR(vma)) {
1302                 err = PTR_ERR(vma);
1303                 goto err_put_bo;
1304         }
1305
1306         if (use_phys)
1307                 overlay->flip_addr = sg_dma_address(obj->mm.pages->sgl);
1308         else
1309                 overlay->flip_addr = i915_ggtt_offset(vma);
1310         overlay->regs = i915_vma_pin_iomap(vma);
1311         i915_vma_unpin(vma);
1312
1313         if (IS_ERR(overlay->regs)) {
1314                 err = PTR_ERR(overlay->regs);
1315                 goto err_put_bo;
1316         }
1317
1318         overlay->reg_bo = obj;
1319         return 0;
1320
1321 err_put_bo:
1322         i915_gem_object_put(obj);
1323         return err;
1324 }
1325
1326 void intel_overlay_setup(struct drm_i915_private *dev_priv)
1327 {
1328         struct intel_overlay *overlay;
1329         int ret;
1330
1331         if (!HAS_OVERLAY(dev_priv))
1332                 return;
1333
1334         if (!HAS_ENGINE(dev_priv, RCS0))
1335                 return;
1336
1337         overlay = kzalloc(sizeof(*overlay), GFP_KERNEL);
1338         if (!overlay)
1339                 return;
1340
1341         overlay->i915 = dev_priv;
1342         overlay->context = dev_priv->engine[RCS0]->kernel_context;
1343         GEM_BUG_ON(!overlay->context);
1344
1345         overlay->color_key = 0x0101fe;
1346         overlay->color_key_enabled = true;
1347         overlay->brightness = -19;
1348         overlay->contrast = 75;
1349         overlay->saturation = 146;
1350
1351         i915_active_init(&overlay->last_flip,
1352                          NULL, intel_overlay_last_flip_retire);
1353
1354         ret = get_registers(overlay, OVERLAY_NEEDS_PHYSICAL(dev_priv));
1355         if (ret)
1356                 goto out_free;
1357
1358         memset_io(overlay->regs, 0, sizeof(struct overlay_registers));
1359         update_polyphase_filter(overlay->regs);
1360         update_reg_attrs(overlay, overlay->regs);
1361
1362         dev_priv->overlay = overlay;
1363         DRM_INFO("Initialized overlay support.\n");
1364         return;
1365
1366 out_free:
1367         kfree(overlay);
1368 }
1369
1370 void intel_overlay_cleanup(struct drm_i915_private *dev_priv)
1371 {
1372         struct intel_overlay *overlay;
1373
1374         overlay = fetch_and_zero(&dev_priv->overlay);
1375         if (!overlay)
1376                 return;
1377
1378         /*
1379          * The bo's should be free'd by the generic code already.
1380          * Furthermore modesetting teardown happens beforehand so the
1381          * hardware should be off already.
1382          */
1383         WARN_ON(overlay->active);
1384
1385         i915_gem_object_put(overlay->reg_bo);
1386         i915_active_fini(&overlay->last_flip);
1387
1388         kfree(overlay);
1389 }
1390
1391 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
1392
1393 struct intel_overlay_error_state {
1394         struct overlay_registers regs;
1395         unsigned long base;
1396         u32 dovsta;
1397         u32 isr;
1398 };
1399
1400 struct intel_overlay_error_state *
1401 intel_overlay_capture_error_state(struct drm_i915_private *dev_priv)
1402 {
1403         struct intel_overlay *overlay = dev_priv->overlay;
1404         struct intel_overlay_error_state *error;
1405
1406         if (!overlay || !overlay->active)
1407                 return NULL;
1408
1409         error = kmalloc(sizeof(*error), GFP_ATOMIC);
1410         if (error == NULL)
1411                 return NULL;
1412
1413         error->dovsta = I915_READ(DOVSTA);
1414         error->isr = I915_READ(GEN2_ISR);
1415         error->base = overlay->flip_addr;
1416
1417         memcpy_fromio(&error->regs, overlay->regs, sizeof(error->regs));
1418
1419         return error;
1420 }
1421
1422 void
1423 intel_overlay_print_error_state(struct drm_i915_error_state_buf *m,
1424                                 struct intel_overlay_error_state *error)
1425 {
1426         i915_error_printf(m, "Overlay, status: 0x%08x, interrupt: 0x%08x\n",
1427                           error->dovsta, error->isr);
1428         i915_error_printf(m, "  Register file at 0x%08lx:\n",
1429                           error->base);
1430
1431 #define P(x) i915_error_printf(m, "    " #x ":  0x%08x\n", error->regs.x)
1432         P(OBUF_0Y);
1433         P(OBUF_1Y);
1434         P(OBUF_0U);
1435         P(OBUF_0V);
1436         P(OBUF_1U);
1437         P(OBUF_1V);
1438         P(OSTRIDE);
1439         P(YRGB_VPH);
1440         P(UV_VPH);
1441         P(HORZ_PH);
1442         P(INIT_PHS);
1443         P(DWINPOS);
1444         P(DWINSZ);
1445         P(SWIDTH);
1446         P(SWIDTHSW);
1447         P(SHEIGHT);
1448         P(YRGBSCALE);
1449         P(UVSCALE);
1450         P(OCLRC0);
1451         P(OCLRC1);
1452         P(DCLRKV);
1453         P(DCLRKM);
1454         P(SCLRKVH);
1455         P(SCLRKVL);
1456         P(SCLRKEN);
1457         P(OCONFIG);
1458         P(OCMD);
1459         P(OSTART_0Y);
1460         P(OSTART_1Y);
1461         P(OSTART_0U);
1462         P(OSTART_0V);
1463         P(OSTART_1U);
1464         P(OSTART_1V);
1465         P(OTILEOFF_0Y);
1466         P(OTILEOFF_1Y);
1467         P(OTILEOFF_0U);
1468         P(OTILEOFF_0V);
1469         P(OTILEOFF_1U);
1470         P(OTILEOFF_1V);
1471         P(FASTHSCALE);
1472         P(UVSCALEV);
1473 #undef P
1474 }
1475
1476 #endif