Merge tag 'char-misc-5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregk...
[linux-2.6-microblaze.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
31 #include "gem/i915_gem_pm.h"
32 #include "gt/intel_gpu_commands.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
105 #define RGB30_TO_COLORKEY(c) \
106         ((((c) & 0x3fc00000) >> 6) | (((c) & 0x000ff000) >> 4) | (((c) & 0x000003fc) >> 2))
107 #define RGB16_TO_COLORKEY(c) \
108         ((((c) & 0xf800) << 8) | (((c) & 0x07e0) << 5) | (((c) & 0x001f) << 3))
109 #define RGB15_TO_COLORKEY(c) \
110         ((((c) & 0x7c00) << 9) | (((c) & 0x03e0) << 6) | (((c) & 0x001f) << 3))
111 #define RGB8I_TO_COLORKEY(c) \
112         ((((c) & 0xff) << 16) | (((c) & 0xff) << 8) | (((c) & 0xff) << 0))
113
114 /* overlay flip addr flag */
115 #define OFC_UPDATE              0x1
116
117 /* polyphase filter coefficients */
118 #define N_HORIZ_Y_TAPS          5
119 #define N_VERT_Y_TAPS           3
120 #define N_HORIZ_UV_TAPS         3
121 #define N_VERT_UV_TAPS          3
122 #define N_PHASES                17
123 #define MAX_TAPS                5
124
125 /* memory bufferd overlay registers */
126 struct overlay_registers {
127         u32 OBUF_0Y;
128         u32 OBUF_1Y;
129         u32 OBUF_0U;
130         u32 OBUF_0V;
131         u32 OBUF_1U;
132         u32 OBUF_1V;
133         u32 OSTRIDE;
134         u32 YRGB_VPH;
135         u32 UV_VPH;
136         u32 HORZ_PH;
137         u32 INIT_PHS;
138         u32 DWINPOS;
139         u32 DWINSZ;
140         u32 SWIDTH;
141         u32 SWIDTHSW;
142         u32 SHEIGHT;
143         u32 YRGBSCALE;
144         u32 UVSCALE;
145         u32 OCLRC0;
146         u32 OCLRC1;
147         u32 DCLRKV;
148         u32 DCLRKM;
149         u32 SCLRKVH;
150         u32 SCLRKVL;
151         u32 SCLRKEN;
152         u32 OCONFIG;
153         u32 OCMD;
154         u32 RESERVED1; /* 0x6C */
155         u32 OSTART_0Y;
156         u32 OSTART_1Y;
157         u32 OSTART_0U;
158         u32 OSTART_0V;
159         u32 OSTART_1U;
160         u32 OSTART_1V;
161         u32 OTILEOFF_0Y;
162         u32 OTILEOFF_1Y;
163         u32 OTILEOFF_0U;
164         u32 OTILEOFF_0V;
165         u32 OTILEOFF_1U;
166         u32 OTILEOFF_1V;
167         u32 FASTHSCALE; /* 0xA0 */
168         u32 UVSCALEV; /* 0xA4 */
169         u32 RESERVEDC[(0x200 - 0xA8) / 4]; /* 0xA8 - 0x1FC */
170         u16 Y_VCOEFS[N_VERT_Y_TAPS * N_PHASES]; /* 0x200 */
171         u16 RESERVEDD[0x100 / 2 - N_VERT_Y_TAPS * N_PHASES];
172         u16 Y_HCOEFS[N_HORIZ_Y_TAPS * N_PHASES]; /* 0x300 */
173         u16 RESERVEDE[0x200 / 2 - N_HORIZ_Y_TAPS * N_PHASES];
174         u16 UV_VCOEFS[N_VERT_UV_TAPS * N_PHASES]; /* 0x500 */
175         u16 RESERVEDF[0x100 / 2 - N_VERT_UV_TAPS * N_PHASES];
176         u16 UV_HCOEFS[N_HORIZ_UV_TAPS * N_PHASES]; /* 0x600 */
177         u16 RESERVEDG[0x100 / 2 - N_HORIZ_UV_TAPS * N_PHASES];
178 };
179
180 struct intel_overlay {
181         struct drm_i915_private *i915;
182         struct intel_context *context;
183         struct intel_crtc *crtc;
184         struct i915_vma *vma;
185         struct i915_vma *old_vma;
186         struct intel_frontbuffer *frontbuffer;
187         bool active;
188         bool pfit_active;
189         u32 pfit_vscale_ratio; /* shifted-point number, (1<<12) == 1.0 */
190         u32 color_key:24;
191         u32 color_key_enabled:1;
192         u32 brightness, contrast, saturation;
193         u32 old_xscale, old_yscale;
194         /* register access */
195         struct drm_i915_gem_object *reg_bo;
196         struct overlay_registers __iomem *regs;
197         u32 flip_addr;
198         /* flip handling */
199         struct i915_active last_flip;
200         void (*flip_complete)(struct intel_overlay *ovl);
201 };
202
203 static void i830_overlay_clock_gating(struct drm_i915_private *dev_priv,
204                                       bool enable)
205 {
206         struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
207         u8 val;
208
209         /* WA_OVERLAY_CLKGATE:alm */
210         if (enable)
211                 intel_de_write(dev_priv, DSPCLK_GATE_D, 0);
212         else
213                 intel_de_write(dev_priv, DSPCLK_GATE_D,
214                                OVRUNIT_CLOCK_GATE_DISABLE);
215
216         /* WA_DISABLE_L2CACHE_CLOCK_GATING:alm */
217         pci_bus_read_config_byte(pdev->bus,
218                                  PCI_DEVFN(0, 0), I830_CLOCK_GATE, &val);
219         if (enable)
220                 val &= ~I830_L2_CACHE_CLOCK_GATE_DISABLE;
221         else
222                 val |= I830_L2_CACHE_CLOCK_GATE_DISABLE;
223         pci_bus_write_config_byte(pdev->bus,
224                                   PCI_DEVFN(0, 0), I830_CLOCK_GATE, val);
225 }
226
227 static struct i915_request *
228 alloc_request(struct intel_overlay *overlay, void (*fn)(struct intel_overlay *))
229 {
230         struct i915_request *rq;
231         int err;
232
233         overlay->flip_complete = fn;
234
235         rq = i915_request_create(overlay->context);
236         if (IS_ERR(rq))
237                 return rq;
238
239         err = i915_active_add_request(&overlay->last_flip, rq);
240         if (err) {
241                 i915_request_add(rq);
242                 return ERR_PTR(err);
243         }
244
245         return rq;
246 }
247
248 /* overlay needs to be disable in OCMD reg */
249 static int intel_overlay_on(struct intel_overlay *overlay)
250 {
251         struct drm_i915_private *dev_priv = overlay->i915;
252         struct i915_request *rq;
253         u32 *cs;
254
255         drm_WARN_ON(&dev_priv->drm, overlay->active);
256
257         rq = alloc_request(overlay, NULL);
258         if (IS_ERR(rq))
259                 return PTR_ERR(rq);
260
261         cs = intel_ring_begin(rq, 4);
262         if (IS_ERR(cs)) {
263                 i915_request_add(rq);
264                 return PTR_ERR(cs);
265         }
266
267         overlay->active = true;
268
269         if (IS_I830(dev_priv))
270                 i830_overlay_clock_gating(dev_priv, false);
271
272         *cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_ON;
273         *cs++ = overlay->flip_addr | OFC_UPDATE;
274         *cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
275         *cs++ = MI_NOOP;
276         intel_ring_advance(rq, cs);
277
278         i915_request_add(rq);
279
280         return i915_active_wait(&overlay->last_flip);
281 }
282
283 static void intel_overlay_flip_prepare(struct intel_overlay *overlay,
284                                        struct i915_vma *vma)
285 {
286         enum pipe pipe = overlay->crtc->pipe;
287         struct intel_frontbuffer *frontbuffer = NULL;
288
289         drm_WARN_ON(&overlay->i915->drm, overlay->old_vma);
290
291         if (vma)
292                 frontbuffer = intel_frontbuffer_get(vma->obj);
293
294         intel_frontbuffer_track(overlay->frontbuffer, frontbuffer,
295                                 INTEL_FRONTBUFFER_OVERLAY(pipe));
296
297         if (overlay->frontbuffer)
298                 intel_frontbuffer_put(overlay->frontbuffer);
299         overlay->frontbuffer = frontbuffer;
300
301         intel_frontbuffer_flip_prepare(overlay->i915,
302                                        INTEL_FRONTBUFFER_OVERLAY(pipe));
303
304         overlay->old_vma = overlay->vma;
305         if (vma)
306                 overlay->vma = i915_vma_get(vma);
307         else
308                 overlay->vma = NULL;
309 }
310
311 /* overlay needs to be enabled in OCMD reg */
312 static int intel_overlay_continue(struct intel_overlay *overlay,
313                                   struct i915_vma *vma,
314                                   bool load_polyphase_filter)
315 {
316         struct drm_i915_private *dev_priv = overlay->i915;
317         struct i915_request *rq;
318         u32 flip_addr = overlay->flip_addr;
319         u32 tmp, *cs;
320
321         drm_WARN_ON(&dev_priv->drm, !overlay->active);
322
323         if (load_polyphase_filter)
324                 flip_addr |= OFC_UPDATE;
325
326         /* check for underruns */
327         tmp = intel_de_read(dev_priv, DOVSTA);
328         if (tmp & (1 << 17))
329                 drm_dbg(&dev_priv->drm, "overlay underrun, DOVSTA: %x\n", tmp);
330
331         rq = alloc_request(overlay, NULL);
332         if (IS_ERR(rq))
333                 return PTR_ERR(rq);
334
335         cs = intel_ring_begin(rq, 2);
336         if (IS_ERR(cs)) {
337                 i915_request_add(rq);
338                 return PTR_ERR(cs);
339         }
340
341         *cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE;
342         *cs++ = flip_addr;
343         intel_ring_advance(rq, cs);
344
345         intel_overlay_flip_prepare(overlay, vma);
346         i915_request_add(rq);
347
348         return 0;
349 }
350
351 static void intel_overlay_release_old_vma(struct intel_overlay *overlay)
352 {
353         struct i915_vma *vma;
354
355         vma = fetch_and_zero(&overlay->old_vma);
356         if (drm_WARN_ON(&overlay->i915->drm, !vma))
357                 return;
358
359         intel_frontbuffer_flip_complete(overlay->i915,
360                                         INTEL_FRONTBUFFER_OVERLAY(overlay->crtc->pipe));
361
362         i915_vma_unpin(vma);
363         i915_vma_put(vma);
364 }
365
366 static void
367 intel_overlay_release_old_vid_tail(struct intel_overlay *overlay)
368 {
369         intel_overlay_release_old_vma(overlay);
370 }
371
372 static void intel_overlay_off_tail(struct intel_overlay *overlay)
373 {
374         struct drm_i915_private *dev_priv = overlay->i915;
375
376         intel_overlay_release_old_vma(overlay);
377
378         overlay->crtc->overlay = NULL;
379         overlay->crtc = NULL;
380         overlay->active = false;
381
382         if (IS_I830(dev_priv))
383                 i830_overlay_clock_gating(dev_priv, true);
384 }
385
386 __i915_active_call static void
387 intel_overlay_last_flip_retire(struct i915_active *active)
388 {
389         struct intel_overlay *overlay =
390                 container_of(active, typeof(*overlay), last_flip);
391
392         if (overlay->flip_complete)
393                 overlay->flip_complete(overlay);
394 }
395
396 /* overlay needs to be disabled in OCMD reg */
397 static int intel_overlay_off(struct intel_overlay *overlay)
398 {
399         struct i915_request *rq;
400         u32 *cs, flip_addr = overlay->flip_addr;
401
402         drm_WARN_ON(&overlay->i915->drm, !overlay->active);
403
404         /* According to intel docs the overlay hw may hang (when switching
405          * off) without loading the filter coeffs. It is however unclear whether
406          * this applies to the disabling of the overlay or to the switching off
407          * of the hw. Do it in both cases */
408         flip_addr |= OFC_UPDATE;
409
410         rq = alloc_request(overlay, intel_overlay_off_tail);
411         if (IS_ERR(rq))
412                 return PTR_ERR(rq);
413
414         cs = intel_ring_begin(rq, 6);
415         if (IS_ERR(cs)) {
416                 i915_request_add(rq);
417                 return PTR_ERR(cs);
418         }
419
420         /* wait for overlay to go idle */
421         *cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE;
422         *cs++ = flip_addr;
423         *cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
424
425         /* turn overlay off */
426         *cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_OFF;
427         *cs++ = flip_addr;
428         *cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
429
430         intel_ring_advance(rq, cs);
431
432         intel_overlay_flip_prepare(overlay, NULL);
433         i915_request_add(rq);
434
435         return i915_active_wait(&overlay->last_flip);
436 }
437
438 /* recover from an interruption due to a signal
439  * We have to be careful not to repeat work forever an make forward progess. */
440 static int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay)
441 {
442         return i915_active_wait(&overlay->last_flip);
443 }
444
445 /* Wait for pending overlay flip and release old frame.
446  * Needs to be called before the overlay register are changed
447  * via intel_overlay_(un)map_regs
448  */
449 static int intel_overlay_release_old_vid(struct intel_overlay *overlay)
450 {
451         struct drm_i915_private *dev_priv = overlay->i915;
452         struct i915_request *rq;
453         u32 *cs;
454
455         /*
456          * Only wait if there is actually an old frame to release to
457          * guarantee forward progress.
458          */
459         if (!overlay->old_vma)
460                 return 0;
461
462         if (!(intel_de_read(dev_priv, GEN2_ISR) & I915_OVERLAY_PLANE_FLIP_PENDING_INTERRUPT)) {
463                 intel_overlay_release_old_vid_tail(overlay);
464                 return 0;
465         }
466
467         rq = alloc_request(overlay, intel_overlay_release_old_vid_tail);
468         if (IS_ERR(rq))
469                 return PTR_ERR(rq);
470
471         cs = intel_ring_begin(rq, 2);
472         if (IS_ERR(cs)) {
473                 i915_request_add(rq);
474                 return PTR_ERR(cs);
475         }
476
477         *cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
478         *cs++ = MI_NOOP;
479         intel_ring_advance(rq, cs);
480
481         i915_request_add(rq);
482
483         return i915_active_wait(&overlay->last_flip);
484 }
485
486 void intel_overlay_reset(struct drm_i915_private *dev_priv)
487 {
488         struct intel_overlay *overlay = dev_priv->overlay;
489
490         if (!overlay)
491                 return;
492
493         overlay->old_xscale = 0;
494         overlay->old_yscale = 0;
495         overlay->crtc = NULL;
496         overlay->active = false;
497 }
498
499 static int packed_depth_bytes(u32 format)
500 {
501         switch (format & I915_OVERLAY_DEPTH_MASK) {
502         case I915_OVERLAY_YUV422:
503                 return 4;
504         case I915_OVERLAY_YUV411:
505                 /* return 6; not implemented */
506         default:
507                 return -EINVAL;
508         }
509 }
510
511 static int packed_width_bytes(u32 format, short width)
512 {
513         switch (format & I915_OVERLAY_DEPTH_MASK) {
514         case I915_OVERLAY_YUV422:
515                 return width << 1;
516         default:
517                 return -EINVAL;
518         }
519 }
520
521 static int uv_hsubsampling(u32 format)
522 {
523         switch (format & I915_OVERLAY_DEPTH_MASK) {
524         case I915_OVERLAY_YUV422:
525         case I915_OVERLAY_YUV420:
526                 return 2;
527         case I915_OVERLAY_YUV411:
528         case I915_OVERLAY_YUV410:
529                 return 4;
530         default:
531                 return -EINVAL;
532         }
533 }
534
535 static int uv_vsubsampling(u32 format)
536 {
537         switch (format & I915_OVERLAY_DEPTH_MASK) {
538         case I915_OVERLAY_YUV420:
539         case I915_OVERLAY_YUV410:
540                 return 2;
541         case I915_OVERLAY_YUV422:
542         case I915_OVERLAY_YUV411:
543                 return 1;
544         default:
545                 return -EINVAL;
546         }
547 }
548
549 static u32 calc_swidthsw(struct drm_i915_private *dev_priv, u32 offset, u32 width)
550 {
551         u32 sw;
552
553         if (IS_DISPLAY_VER(dev_priv, 2))
554                 sw = ALIGN((offset & 31) + width, 32);
555         else
556                 sw = ALIGN((offset & 63) + width, 64);
557
558         if (sw == 0)
559                 return 0;
560
561         return (sw - 32) >> 3;
562 }
563
564 static const u16 y_static_hcoeffs[N_PHASES][N_HORIZ_Y_TAPS] = {
565         [ 0] = { 0x3000, 0xb4a0, 0x1930, 0x1920, 0xb4a0, },
566         [ 1] = { 0x3000, 0xb500, 0x19d0, 0x1880, 0xb440, },
567         [ 2] = { 0x3000, 0xb540, 0x1a88, 0x2f80, 0xb3e0, },
568         [ 3] = { 0x3000, 0xb580, 0x1b30, 0x2e20, 0xb380, },
569         [ 4] = { 0x3000, 0xb5c0, 0x1bd8, 0x2cc0, 0xb320, },
570         [ 5] = { 0x3020, 0xb5e0, 0x1c60, 0x2b80, 0xb2c0, },
571         [ 6] = { 0x3020, 0xb5e0, 0x1cf8, 0x2a20, 0xb260, },
572         [ 7] = { 0x3020, 0xb5e0, 0x1d80, 0x28e0, 0xb200, },
573         [ 8] = { 0x3020, 0xb5c0, 0x1e08, 0x3f40, 0xb1c0, },
574         [ 9] = { 0x3020, 0xb580, 0x1e78, 0x3ce0, 0xb160, },
575         [10] = { 0x3040, 0xb520, 0x1ed8, 0x3aa0, 0xb120, },
576         [11] = { 0x3040, 0xb4a0, 0x1f30, 0x3880, 0xb0e0, },
577         [12] = { 0x3040, 0xb400, 0x1f78, 0x3680, 0xb0a0, },
578         [13] = { 0x3020, 0xb340, 0x1fb8, 0x34a0, 0xb060, },
579         [14] = { 0x3020, 0xb240, 0x1fe0, 0x32e0, 0xb040, },
580         [15] = { 0x3020, 0xb140, 0x1ff8, 0x3160, 0xb020, },
581         [16] = { 0xb000, 0x3000, 0x0800, 0x3000, 0xb000, },
582 };
583
584 static const u16 uv_static_hcoeffs[N_PHASES][N_HORIZ_UV_TAPS] = {
585         [ 0] = { 0x3000, 0x1800, 0x1800, },
586         [ 1] = { 0xb000, 0x18d0, 0x2e60, },
587         [ 2] = { 0xb000, 0x1990, 0x2ce0, },
588         [ 3] = { 0xb020, 0x1a68, 0x2b40, },
589         [ 4] = { 0xb040, 0x1b20, 0x29e0, },
590         [ 5] = { 0xb060, 0x1bd8, 0x2880, },
591         [ 6] = { 0xb080, 0x1c88, 0x3e60, },
592         [ 7] = { 0xb0a0, 0x1d28, 0x3c00, },
593         [ 8] = { 0xb0c0, 0x1db8, 0x39e0, },
594         [ 9] = { 0xb0e0, 0x1e40, 0x37e0, },
595         [10] = { 0xb100, 0x1eb8, 0x3620, },
596         [11] = { 0xb100, 0x1f18, 0x34a0, },
597         [12] = { 0xb100, 0x1f68, 0x3360, },
598         [13] = { 0xb0e0, 0x1fa8, 0x3240, },
599         [14] = { 0xb0c0, 0x1fe0, 0x3140, },
600         [15] = { 0xb060, 0x1ff0, 0x30a0, },
601         [16] = { 0x3000, 0x0800, 0x3000, },
602 };
603
604 static void update_polyphase_filter(struct overlay_registers __iomem *regs)
605 {
606         memcpy_toio(regs->Y_HCOEFS, y_static_hcoeffs, sizeof(y_static_hcoeffs));
607         memcpy_toio(regs->UV_HCOEFS, uv_static_hcoeffs,
608                     sizeof(uv_static_hcoeffs));
609 }
610
611 static bool update_scaling_factors(struct intel_overlay *overlay,
612                                    struct overlay_registers __iomem *regs,
613                                    struct drm_intel_overlay_put_image *params)
614 {
615         /* fixed point with a 12 bit shift */
616         u32 xscale, yscale, xscale_UV, yscale_UV;
617 #define FP_SHIFT 12
618 #define FRACT_MASK 0xfff
619         bool scale_changed = false;
620         int uv_hscale = uv_hsubsampling(params->flags);
621         int uv_vscale = uv_vsubsampling(params->flags);
622
623         if (params->dst_width > 1)
624                 xscale = ((params->src_scan_width - 1) << FP_SHIFT) /
625                         params->dst_width;
626         else
627                 xscale = 1 << FP_SHIFT;
628
629         if (params->dst_height > 1)
630                 yscale = ((params->src_scan_height - 1) << FP_SHIFT) /
631                         params->dst_height;
632         else
633                 yscale = 1 << FP_SHIFT;
634
635         /*if (params->format & I915_OVERLAY_YUV_PLANAR) {*/
636         xscale_UV = xscale/uv_hscale;
637         yscale_UV = yscale/uv_vscale;
638         /* make the Y scale to UV scale ratio an exact multiply */
639         xscale = xscale_UV * uv_hscale;
640         yscale = yscale_UV * uv_vscale;
641         /*} else {
642           xscale_UV = 0;
643           yscale_UV = 0;
644           }*/
645
646         if (xscale != overlay->old_xscale || yscale != overlay->old_yscale)
647                 scale_changed = true;
648         overlay->old_xscale = xscale;
649         overlay->old_yscale = yscale;
650
651         iowrite32(((yscale & FRACT_MASK) << 20) |
652                   ((xscale >> FP_SHIFT)  << 16) |
653                   ((xscale & FRACT_MASK) << 3),
654                  &regs->YRGBSCALE);
655
656         iowrite32(((yscale_UV & FRACT_MASK) << 20) |
657                   ((xscale_UV >> FP_SHIFT)  << 16) |
658                   ((xscale_UV & FRACT_MASK) << 3),
659                  &regs->UVSCALE);
660
661         iowrite32((((yscale    >> FP_SHIFT) << 16) |
662                    ((yscale_UV >> FP_SHIFT) << 0)),
663                  &regs->UVSCALEV);
664
665         if (scale_changed)
666                 update_polyphase_filter(regs);
667
668         return scale_changed;
669 }
670
671 static void update_colorkey(struct intel_overlay *overlay,
672                             struct overlay_registers __iomem *regs)
673 {
674         const struct intel_plane_state *state =
675                 to_intel_plane_state(overlay->crtc->base.primary->state);
676         u32 key = overlay->color_key;
677         u32 format = 0;
678         u32 flags = 0;
679
680         if (overlay->color_key_enabled)
681                 flags |= DST_KEY_ENABLE;
682
683         if (state->uapi.visible)
684                 format = state->hw.fb->format->format;
685
686         switch (format) {
687         case DRM_FORMAT_C8:
688                 key = RGB8I_TO_COLORKEY(key);
689                 flags |= CLK_RGB24_MASK;
690                 break;
691         case DRM_FORMAT_XRGB1555:
692                 key = RGB15_TO_COLORKEY(key);
693                 flags |= CLK_RGB15_MASK;
694                 break;
695         case DRM_FORMAT_RGB565:
696                 key = RGB16_TO_COLORKEY(key);
697                 flags |= CLK_RGB16_MASK;
698                 break;
699         case DRM_FORMAT_XRGB2101010:
700         case DRM_FORMAT_XBGR2101010:
701                 key = RGB30_TO_COLORKEY(key);
702                 flags |= CLK_RGB24_MASK;
703                 break;
704         default:
705                 flags |= CLK_RGB24_MASK;
706                 break;
707         }
708
709         iowrite32(key, &regs->DCLRKV);
710         iowrite32(flags, &regs->DCLRKM);
711 }
712
713 static u32 overlay_cmd_reg(struct drm_intel_overlay_put_image *params)
714 {
715         u32 cmd = OCMD_ENABLE | OCMD_BUF_TYPE_FRAME | OCMD_BUFFER0;
716
717         if (params->flags & I915_OVERLAY_YUV_PLANAR) {
718                 switch (params->flags & I915_OVERLAY_DEPTH_MASK) {
719                 case I915_OVERLAY_YUV422:
720                         cmd |= OCMD_YUV_422_PLANAR;
721                         break;
722                 case I915_OVERLAY_YUV420:
723                         cmd |= OCMD_YUV_420_PLANAR;
724                         break;
725                 case I915_OVERLAY_YUV411:
726                 case I915_OVERLAY_YUV410:
727                         cmd |= OCMD_YUV_410_PLANAR;
728                         break;
729                 }
730         } else { /* YUV packed */
731                 switch (params->flags & I915_OVERLAY_DEPTH_MASK) {
732                 case I915_OVERLAY_YUV422:
733                         cmd |= OCMD_YUV_422_PACKED;
734                         break;
735                 case I915_OVERLAY_YUV411:
736                         cmd |= OCMD_YUV_411_PACKED;
737                         break;
738                 }
739
740                 switch (params->flags & I915_OVERLAY_SWAP_MASK) {
741                 case I915_OVERLAY_NO_SWAP:
742                         break;
743                 case I915_OVERLAY_UV_SWAP:
744                         cmd |= OCMD_UV_SWAP;
745                         break;
746                 case I915_OVERLAY_Y_SWAP:
747                         cmd |= OCMD_Y_SWAP;
748                         break;
749                 case I915_OVERLAY_Y_AND_UV_SWAP:
750                         cmd |= OCMD_Y_AND_UV_SWAP;
751                         break;
752                 }
753         }
754
755         return cmd;
756 }
757
758 static struct i915_vma *intel_overlay_pin_fb(struct drm_i915_gem_object *new_bo)
759 {
760         struct i915_gem_ww_ctx ww;
761         struct i915_vma *vma;
762         int ret;
763
764         i915_gem_ww_ctx_init(&ww, true);
765 retry:
766         ret = i915_gem_object_lock(new_bo, &ww);
767         if (!ret) {
768                 vma = i915_gem_object_pin_to_display_plane(new_bo, &ww, 0,
769                                                            NULL, PIN_MAPPABLE);
770                 ret = PTR_ERR_OR_ZERO(vma);
771         }
772         if (ret == -EDEADLK) {
773                 ret = i915_gem_ww_ctx_backoff(&ww);
774                 if (!ret)
775                         goto retry;
776         }
777         i915_gem_ww_ctx_fini(&ww);
778         if (ret)
779                 return ERR_PTR(ret);
780
781         return vma;
782 }
783
784 static int intel_overlay_do_put_image(struct intel_overlay *overlay,
785                                       struct drm_i915_gem_object *new_bo,
786                                       struct drm_intel_overlay_put_image *params)
787 {
788         struct overlay_registers __iomem *regs = overlay->regs;
789         struct drm_i915_private *dev_priv = overlay->i915;
790         u32 swidth, swidthsw, sheight, ostride;
791         enum pipe pipe = overlay->crtc->pipe;
792         bool scale_changed = false;
793         struct i915_vma *vma;
794         int ret, tmp_width;
795
796         drm_WARN_ON(&dev_priv->drm,
797                     !drm_modeset_is_locked(&dev_priv->drm.mode_config.connection_mutex));
798
799         ret = intel_overlay_release_old_vid(overlay);
800         if (ret != 0)
801                 return ret;
802
803         atomic_inc(&dev_priv->gpu_error.pending_fb_pin);
804
805         vma = intel_overlay_pin_fb(new_bo);
806         if (IS_ERR(vma)) {
807                 ret = PTR_ERR(vma);
808                 goto out_pin_section;
809         }
810
811         i915_gem_object_flush_frontbuffer(new_bo, ORIGIN_DIRTYFB);
812
813         if (!overlay->active) {
814                 const struct intel_crtc_state *crtc_state =
815                         overlay->crtc->config;
816                 u32 oconfig = 0;
817
818                 if (crtc_state->gamma_enable &&
819                     crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT)
820                         oconfig |= OCONF_CC_OUT_8BIT;
821                 if (crtc_state->gamma_enable)
822                         oconfig |= OCONF_GAMMA2_ENABLE;
823                 if (IS_DISPLAY_VER(dev_priv, 4))
824                         oconfig |= OCONF_CSC_MODE_BT709;
825                 oconfig |= pipe == 0 ?
826                         OCONF_PIPE_A : OCONF_PIPE_B;
827                 iowrite32(oconfig, &regs->OCONFIG);
828
829                 ret = intel_overlay_on(overlay);
830                 if (ret != 0)
831                         goto out_unpin;
832         }
833
834         iowrite32(params->dst_y << 16 | params->dst_x, &regs->DWINPOS);
835         iowrite32(params->dst_height << 16 | params->dst_width, &regs->DWINSZ);
836
837         if (params->flags & I915_OVERLAY_YUV_PACKED)
838                 tmp_width = packed_width_bytes(params->flags,
839                                                params->src_width);
840         else
841                 tmp_width = params->src_width;
842
843         swidth = params->src_width;
844         swidthsw = calc_swidthsw(dev_priv, params->offset_Y, tmp_width);
845         sheight = params->src_height;
846         iowrite32(i915_ggtt_offset(vma) + params->offset_Y, &regs->OBUF_0Y);
847         ostride = params->stride_Y;
848
849         if (params->flags & I915_OVERLAY_YUV_PLANAR) {
850                 int uv_hscale = uv_hsubsampling(params->flags);
851                 int uv_vscale = uv_vsubsampling(params->flags);
852                 u32 tmp_U, tmp_V;
853
854                 swidth |= (params->src_width / uv_hscale) << 16;
855                 sheight |= (params->src_height / uv_vscale) << 16;
856
857                 tmp_U = calc_swidthsw(dev_priv, params->offset_U,
858                                       params->src_width / uv_hscale);
859                 tmp_V = calc_swidthsw(dev_priv, params->offset_V,
860                                       params->src_width / uv_hscale);
861                 swidthsw |= max(tmp_U, tmp_V) << 16;
862
863                 iowrite32(i915_ggtt_offset(vma) + params->offset_U,
864                           &regs->OBUF_0U);
865                 iowrite32(i915_ggtt_offset(vma) + params->offset_V,
866                           &regs->OBUF_0V);
867
868                 ostride |= params->stride_UV << 16;
869         }
870
871         iowrite32(swidth, &regs->SWIDTH);
872         iowrite32(swidthsw, &regs->SWIDTHSW);
873         iowrite32(sheight, &regs->SHEIGHT);
874         iowrite32(ostride, &regs->OSTRIDE);
875
876         scale_changed = update_scaling_factors(overlay, regs, params);
877
878         update_colorkey(overlay, regs);
879
880         iowrite32(overlay_cmd_reg(params), &regs->OCMD);
881
882         ret = intel_overlay_continue(overlay, vma, scale_changed);
883         if (ret)
884                 goto out_unpin;
885
886         return 0;
887
888 out_unpin:
889         i915_vma_unpin(vma);
890 out_pin_section:
891         atomic_dec(&dev_priv->gpu_error.pending_fb_pin);
892
893         return ret;
894 }
895
896 int intel_overlay_switch_off(struct intel_overlay *overlay)
897 {
898         struct drm_i915_private *dev_priv = overlay->i915;
899         int ret;
900
901         drm_WARN_ON(&dev_priv->drm,
902                     !drm_modeset_is_locked(&dev_priv->drm.mode_config.connection_mutex));
903
904         ret = intel_overlay_recover_from_interrupt(overlay);
905         if (ret != 0)
906                 return ret;
907
908         if (!overlay->active)
909                 return 0;
910
911         ret = intel_overlay_release_old_vid(overlay);
912         if (ret != 0)
913                 return ret;
914
915         iowrite32(0, &overlay->regs->OCMD);
916
917         return intel_overlay_off(overlay);
918 }
919
920 static int check_overlay_possible_on_crtc(struct intel_overlay *overlay,
921                                           struct intel_crtc *crtc)
922 {
923         if (!crtc->active)
924                 return -EINVAL;
925
926         /* can't use the overlay with double wide pipe */
927         if (crtc->config->double_wide)
928                 return -EINVAL;
929
930         return 0;
931 }
932
933 static void update_pfit_vscale_ratio(struct intel_overlay *overlay)
934 {
935         struct drm_i915_private *dev_priv = overlay->i915;
936         u32 pfit_control = intel_de_read(dev_priv, PFIT_CONTROL);
937         u32 ratio;
938
939         /* XXX: This is not the same logic as in the xorg driver, but more in
940          * line with the intel documentation for the i965
941          */
942         if (DISPLAY_VER(dev_priv) >= 4) {
943                 /* on i965 use the PGM reg to read out the autoscaler values */
944                 ratio = intel_de_read(dev_priv, PFIT_PGM_RATIOS) >> PFIT_VERT_SCALE_SHIFT_965;
945         } else {
946                 if (pfit_control & VERT_AUTO_SCALE)
947                         ratio = intel_de_read(dev_priv, PFIT_AUTO_RATIOS);
948                 else
949                         ratio = intel_de_read(dev_priv, PFIT_PGM_RATIOS);
950                 ratio >>= PFIT_VERT_SCALE_SHIFT;
951         }
952
953         overlay->pfit_vscale_ratio = ratio;
954 }
955
956 static int check_overlay_dst(struct intel_overlay *overlay,
957                              struct drm_intel_overlay_put_image *rec)
958 {
959         const struct intel_crtc_state *pipe_config =
960                 overlay->crtc->config;
961
962         if (rec->dst_x < pipe_config->pipe_src_w &&
963             rec->dst_x + rec->dst_width <= pipe_config->pipe_src_w &&
964             rec->dst_y < pipe_config->pipe_src_h &&
965             rec->dst_y + rec->dst_height <= pipe_config->pipe_src_h)
966                 return 0;
967         else
968                 return -EINVAL;
969 }
970
971 static int check_overlay_scaling(struct drm_intel_overlay_put_image *rec)
972 {
973         u32 tmp;
974
975         /* downscaling limit is 8.0 */
976         tmp = ((rec->src_scan_height << 16) / rec->dst_height) >> 16;
977         if (tmp > 7)
978                 return -EINVAL;
979
980         tmp = ((rec->src_scan_width << 16) / rec->dst_width) >> 16;
981         if (tmp > 7)
982                 return -EINVAL;
983
984         return 0;
985 }
986
987 static int check_overlay_src(struct drm_i915_private *dev_priv,
988                              struct drm_intel_overlay_put_image *rec,
989                              struct drm_i915_gem_object *new_bo)
990 {
991         int uv_hscale = uv_hsubsampling(rec->flags);
992         int uv_vscale = uv_vsubsampling(rec->flags);
993         u32 stride_mask;
994         int depth;
995         u32 tmp;
996
997         /* check src dimensions */
998         if (IS_I845G(dev_priv) || IS_I830(dev_priv)) {
999                 if (rec->src_height > IMAGE_MAX_HEIGHT_LEGACY ||
1000                     rec->src_width  > IMAGE_MAX_WIDTH_LEGACY)
1001                         return -EINVAL;
1002         } else {
1003                 if (rec->src_height > IMAGE_MAX_HEIGHT ||
1004                     rec->src_width  > IMAGE_MAX_WIDTH)
1005                         return -EINVAL;
1006         }
1007
1008         /* better safe than sorry, use 4 as the maximal subsampling ratio */
1009         if (rec->src_height < N_VERT_Y_TAPS*4 ||
1010             rec->src_width  < N_HORIZ_Y_TAPS*4)
1011                 return -EINVAL;
1012
1013         /* check alignment constraints */
1014         switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
1015         case I915_OVERLAY_RGB:
1016                 /* not implemented */
1017                 return -EINVAL;
1018
1019         case I915_OVERLAY_YUV_PACKED:
1020                 if (uv_vscale != 1)
1021                         return -EINVAL;
1022
1023                 depth = packed_depth_bytes(rec->flags);
1024                 if (depth < 0)
1025                         return depth;
1026
1027                 /* ignore UV planes */
1028                 rec->stride_UV = 0;
1029                 rec->offset_U = 0;
1030                 rec->offset_V = 0;
1031                 /* check pixel alignment */
1032                 if (rec->offset_Y % depth)
1033                         return -EINVAL;
1034                 break;
1035
1036         case I915_OVERLAY_YUV_PLANAR:
1037                 if (uv_vscale < 0 || uv_hscale < 0)
1038                         return -EINVAL;
1039                 /* no offset restrictions for planar formats */
1040                 break;
1041
1042         default:
1043                 return -EINVAL;
1044         }
1045
1046         if (rec->src_width % uv_hscale)
1047                 return -EINVAL;
1048
1049         /* stride checking */
1050         if (IS_I830(dev_priv) || IS_I845G(dev_priv))
1051                 stride_mask = 255;
1052         else
1053                 stride_mask = 63;
1054
1055         if (rec->stride_Y & stride_mask || rec->stride_UV & stride_mask)
1056                 return -EINVAL;
1057         if (IS_DISPLAY_VER(dev_priv, 4) && rec->stride_Y < 512)
1058                 return -EINVAL;
1059
1060         tmp = (rec->flags & I915_OVERLAY_TYPE_MASK) == I915_OVERLAY_YUV_PLANAR ?
1061                 4096 : 8192;
1062         if (rec->stride_Y > tmp || rec->stride_UV > 2*1024)
1063                 return -EINVAL;
1064
1065         /* check buffer dimensions */
1066         switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
1067         case I915_OVERLAY_RGB:
1068         case I915_OVERLAY_YUV_PACKED:
1069                 /* always 4 Y values per depth pixels */
1070                 if (packed_width_bytes(rec->flags, rec->src_width) > rec->stride_Y)
1071                         return -EINVAL;
1072
1073                 tmp = rec->stride_Y*rec->src_height;
1074                 if (rec->offset_Y + tmp > new_bo->base.size)
1075                         return -EINVAL;
1076                 break;
1077
1078         case I915_OVERLAY_YUV_PLANAR:
1079                 if (rec->src_width > rec->stride_Y)
1080                         return -EINVAL;
1081                 if (rec->src_width/uv_hscale > rec->stride_UV)
1082                         return -EINVAL;
1083
1084                 tmp = rec->stride_Y * rec->src_height;
1085                 if (rec->offset_Y + tmp > new_bo->base.size)
1086                         return -EINVAL;
1087
1088                 tmp = rec->stride_UV * (rec->src_height / uv_vscale);
1089                 if (rec->offset_U + tmp > new_bo->base.size ||
1090                     rec->offset_V + tmp > new_bo->base.size)
1091                         return -EINVAL;
1092                 break;
1093         }
1094
1095         return 0;
1096 }
1097
1098 int intel_overlay_put_image_ioctl(struct drm_device *dev, void *data,
1099                                   struct drm_file *file_priv)
1100 {
1101         struct drm_intel_overlay_put_image *params = data;
1102         struct drm_i915_private *dev_priv = to_i915(dev);
1103         struct intel_overlay *overlay;
1104         struct drm_crtc *drmmode_crtc;
1105         struct intel_crtc *crtc;
1106         struct drm_i915_gem_object *new_bo;
1107         int ret;
1108
1109         overlay = dev_priv->overlay;
1110         if (!overlay) {
1111                 drm_dbg(&dev_priv->drm, "userspace bug: no overlay\n");
1112                 return -ENODEV;
1113         }
1114
1115         if (!(params->flags & I915_OVERLAY_ENABLE)) {
1116                 drm_modeset_lock_all(dev);
1117                 ret = intel_overlay_switch_off(overlay);
1118                 drm_modeset_unlock_all(dev);
1119
1120                 return ret;
1121         }
1122
1123         drmmode_crtc = drm_crtc_find(dev, file_priv, params->crtc_id);
1124         if (!drmmode_crtc)
1125                 return -ENOENT;
1126         crtc = to_intel_crtc(drmmode_crtc);
1127
1128         new_bo = i915_gem_object_lookup(file_priv, params->bo_handle);
1129         if (!new_bo)
1130                 return -ENOENT;
1131
1132         drm_modeset_lock_all(dev);
1133
1134         if (i915_gem_object_is_tiled(new_bo)) {
1135                 drm_dbg_kms(&dev_priv->drm,
1136                             "buffer used for overlay image can not be tiled\n");
1137                 ret = -EINVAL;
1138                 goto out_unlock;
1139         }
1140
1141         ret = intel_overlay_recover_from_interrupt(overlay);
1142         if (ret != 0)
1143                 goto out_unlock;
1144
1145         if (overlay->crtc != crtc) {
1146                 ret = intel_overlay_switch_off(overlay);
1147                 if (ret != 0)
1148                         goto out_unlock;
1149
1150                 ret = check_overlay_possible_on_crtc(overlay, crtc);
1151                 if (ret != 0)
1152                         goto out_unlock;
1153
1154                 overlay->crtc = crtc;
1155                 crtc->overlay = overlay;
1156
1157                 /* line too wide, i.e. one-line-mode */
1158                 if (crtc->config->pipe_src_w > 1024 &&
1159                     crtc->config->gmch_pfit.control & PFIT_ENABLE) {
1160                         overlay->pfit_active = true;
1161                         update_pfit_vscale_ratio(overlay);
1162                 } else
1163                         overlay->pfit_active = false;
1164         }
1165
1166         ret = check_overlay_dst(overlay, params);
1167         if (ret != 0)
1168                 goto out_unlock;
1169
1170         if (overlay->pfit_active) {
1171                 params->dst_y = (((u32)params->dst_y << 12) /
1172                                  overlay->pfit_vscale_ratio);
1173                 /* shifting right rounds downwards, so add 1 */
1174                 params->dst_height = (((u32)params->dst_height << 12) /
1175                                  overlay->pfit_vscale_ratio) + 1;
1176         }
1177
1178         if (params->src_scan_height > params->src_height ||
1179             params->src_scan_width > params->src_width) {
1180                 ret = -EINVAL;
1181                 goto out_unlock;
1182         }
1183
1184         ret = check_overlay_src(dev_priv, params, new_bo);
1185         if (ret != 0)
1186                 goto out_unlock;
1187
1188         /* Check scaling after src size to prevent a divide-by-zero. */
1189         ret = check_overlay_scaling(params);
1190         if (ret != 0)
1191                 goto out_unlock;
1192
1193         ret = intel_overlay_do_put_image(overlay, new_bo, params);
1194         if (ret != 0)
1195                 goto out_unlock;
1196
1197         drm_modeset_unlock_all(dev);
1198         i915_gem_object_put(new_bo);
1199
1200         return 0;
1201
1202 out_unlock:
1203         drm_modeset_unlock_all(dev);
1204         i915_gem_object_put(new_bo);
1205
1206         return ret;
1207 }
1208
1209 static void update_reg_attrs(struct intel_overlay *overlay,
1210                              struct overlay_registers __iomem *regs)
1211 {
1212         iowrite32((overlay->contrast << 18) | (overlay->brightness & 0xff),
1213                   &regs->OCLRC0);
1214         iowrite32(overlay->saturation, &regs->OCLRC1);
1215 }
1216
1217 static bool check_gamma_bounds(u32 gamma1, u32 gamma2)
1218 {
1219         int i;
1220
1221         if (gamma1 & 0xff000000 || gamma2 & 0xff000000)
1222                 return false;
1223
1224         for (i = 0; i < 3; i++) {
1225                 if (((gamma1 >> i*8) & 0xff) >= ((gamma2 >> i*8) & 0xff))
1226                         return false;
1227         }
1228
1229         return true;
1230 }
1231
1232 static bool check_gamma5_errata(u32 gamma5)
1233 {
1234         int i;
1235
1236         for (i = 0; i < 3; i++) {
1237                 if (((gamma5 >> i*8) & 0xff) == 0x80)
1238                         return false;
1239         }
1240
1241         return true;
1242 }
1243
1244 static int check_gamma(struct drm_intel_overlay_attrs *attrs)
1245 {
1246         if (!check_gamma_bounds(0, attrs->gamma0) ||
1247             !check_gamma_bounds(attrs->gamma0, attrs->gamma1) ||
1248             !check_gamma_bounds(attrs->gamma1, attrs->gamma2) ||
1249             !check_gamma_bounds(attrs->gamma2, attrs->gamma3) ||
1250             !check_gamma_bounds(attrs->gamma3, attrs->gamma4) ||
1251             !check_gamma_bounds(attrs->gamma4, attrs->gamma5) ||
1252             !check_gamma_bounds(attrs->gamma5, 0x00ffffff))
1253                 return -EINVAL;
1254
1255         if (!check_gamma5_errata(attrs->gamma5))
1256                 return -EINVAL;
1257
1258         return 0;
1259 }
1260
1261 int intel_overlay_attrs_ioctl(struct drm_device *dev, void *data,
1262                               struct drm_file *file_priv)
1263 {
1264         struct drm_intel_overlay_attrs *attrs = data;
1265         struct drm_i915_private *dev_priv = to_i915(dev);
1266         struct intel_overlay *overlay;
1267         int ret;
1268
1269         overlay = dev_priv->overlay;
1270         if (!overlay) {
1271                 drm_dbg(&dev_priv->drm, "userspace bug: no overlay\n");
1272                 return -ENODEV;
1273         }
1274
1275         drm_modeset_lock_all(dev);
1276
1277         ret = -EINVAL;
1278         if (!(attrs->flags & I915_OVERLAY_UPDATE_ATTRS)) {
1279                 attrs->color_key  = overlay->color_key;
1280                 attrs->brightness = overlay->brightness;
1281                 attrs->contrast   = overlay->contrast;
1282                 attrs->saturation = overlay->saturation;
1283
1284                 if (!IS_DISPLAY_VER(dev_priv, 2)) {
1285                         attrs->gamma0 = intel_de_read(dev_priv, OGAMC0);
1286                         attrs->gamma1 = intel_de_read(dev_priv, OGAMC1);
1287                         attrs->gamma2 = intel_de_read(dev_priv, OGAMC2);
1288                         attrs->gamma3 = intel_de_read(dev_priv, OGAMC3);
1289                         attrs->gamma4 = intel_de_read(dev_priv, OGAMC4);
1290                         attrs->gamma5 = intel_de_read(dev_priv, OGAMC5);
1291                 }
1292         } else {
1293                 if (attrs->brightness < -128 || attrs->brightness > 127)
1294                         goto out_unlock;
1295                 if (attrs->contrast > 255)
1296                         goto out_unlock;
1297                 if (attrs->saturation > 1023)
1298                         goto out_unlock;
1299
1300                 overlay->color_key  = attrs->color_key;
1301                 overlay->brightness = attrs->brightness;
1302                 overlay->contrast   = attrs->contrast;
1303                 overlay->saturation = attrs->saturation;
1304
1305                 update_reg_attrs(overlay, overlay->regs);
1306
1307                 if (attrs->flags & I915_OVERLAY_UPDATE_GAMMA) {
1308                         if (IS_DISPLAY_VER(dev_priv, 2))
1309                                 goto out_unlock;
1310
1311                         if (overlay->active) {
1312                                 ret = -EBUSY;
1313                                 goto out_unlock;
1314                         }
1315
1316                         ret = check_gamma(attrs);
1317                         if (ret)
1318                                 goto out_unlock;
1319
1320                         intel_de_write(dev_priv, OGAMC0, attrs->gamma0);
1321                         intel_de_write(dev_priv, OGAMC1, attrs->gamma1);
1322                         intel_de_write(dev_priv, OGAMC2, attrs->gamma2);
1323                         intel_de_write(dev_priv, OGAMC3, attrs->gamma3);
1324                         intel_de_write(dev_priv, OGAMC4, attrs->gamma4);
1325                         intel_de_write(dev_priv, OGAMC5, attrs->gamma5);
1326                 }
1327         }
1328         overlay->color_key_enabled = (attrs->flags & I915_OVERLAY_DISABLE_DEST_COLORKEY) == 0;
1329
1330         ret = 0;
1331 out_unlock:
1332         drm_modeset_unlock_all(dev);
1333
1334         return ret;
1335 }
1336
1337 static int get_registers(struct intel_overlay *overlay, bool use_phys)
1338 {
1339         struct drm_i915_private *i915 = overlay->i915;
1340         struct drm_i915_gem_object *obj;
1341         struct i915_vma *vma;
1342         int err;
1343
1344         obj = i915_gem_object_create_stolen(i915, PAGE_SIZE);
1345         if (IS_ERR(obj))
1346                 obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
1347         if (IS_ERR(obj))
1348                 return PTR_ERR(obj);
1349
1350         vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, PIN_MAPPABLE);
1351         if (IS_ERR(vma)) {
1352                 err = PTR_ERR(vma);
1353                 goto err_put_bo;
1354         }
1355
1356         if (use_phys)
1357                 overlay->flip_addr = sg_dma_address(obj->mm.pages->sgl);
1358         else
1359                 overlay->flip_addr = i915_ggtt_offset(vma);
1360         overlay->regs = i915_vma_pin_iomap(vma);
1361         i915_vma_unpin(vma);
1362
1363         if (IS_ERR(overlay->regs)) {
1364                 err = PTR_ERR(overlay->regs);
1365                 goto err_put_bo;
1366         }
1367
1368         overlay->reg_bo = obj;
1369         return 0;
1370
1371 err_put_bo:
1372         i915_gem_object_put(obj);
1373         return err;
1374 }
1375
1376 void intel_overlay_setup(struct drm_i915_private *dev_priv)
1377 {
1378         struct intel_overlay *overlay;
1379         struct intel_engine_cs *engine;
1380         int ret;
1381
1382         if (!HAS_OVERLAY(dev_priv))
1383                 return;
1384
1385         engine = dev_priv->gt.engine[RCS0];
1386         if (!engine || !engine->kernel_context)
1387                 return;
1388
1389         overlay = kzalloc(sizeof(*overlay), GFP_KERNEL);
1390         if (!overlay)
1391                 return;
1392
1393         overlay->i915 = dev_priv;
1394         overlay->context = engine->kernel_context;
1395         GEM_BUG_ON(!overlay->context);
1396
1397         overlay->color_key = 0x0101fe;
1398         overlay->color_key_enabled = true;
1399         overlay->brightness = -19;
1400         overlay->contrast = 75;
1401         overlay->saturation = 146;
1402
1403         i915_active_init(&overlay->last_flip,
1404                          NULL, intel_overlay_last_flip_retire);
1405
1406         ret = get_registers(overlay, OVERLAY_NEEDS_PHYSICAL(dev_priv));
1407         if (ret)
1408                 goto out_free;
1409
1410         memset_io(overlay->regs, 0, sizeof(struct overlay_registers));
1411         update_polyphase_filter(overlay->regs);
1412         update_reg_attrs(overlay, overlay->regs);
1413
1414         dev_priv->overlay = overlay;
1415         drm_info(&dev_priv->drm, "Initialized overlay support.\n");
1416         return;
1417
1418 out_free:
1419         kfree(overlay);
1420 }
1421
1422 void intel_overlay_cleanup(struct drm_i915_private *dev_priv)
1423 {
1424         struct intel_overlay *overlay;
1425
1426         overlay = fetch_and_zero(&dev_priv->overlay);
1427         if (!overlay)
1428                 return;
1429
1430         /*
1431          * The bo's should be free'd by the generic code already.
1432          * Furthermore modesetting teardown happens beforehand so the
1433          * hardware should be off already.
1434          */
1435         drm_WARN_ON(&dev_priv->drm, overlay->active);
1436
1437         i915_gem_object_put(overlay->reg_bo);
1438         i915_active_fini(&overlay->last_flip);
1439
1440         kfree(overlay);
1441 }
1442
1443 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
1444
1445 struct intel_overlay_error_state {
1446         struct overlay_registers regs;
1447         unsigned long base;
1448         u32 dovsta;
1449         u32 isr;
1450 };
1451
1452 struct intel_overlay_error_state *
1453 intel_overlay_capture_error_state(struct drm_i915_private *dev_priv)
1454 {
1455         struct intel_overlay *overlay = dev_priv->overlay;
1456         struct intel_overlay_error_state *error;
1457
1458         if (!overlay || !overlay->active)
1459                 return NULL;
1460
1461         error = kmalloc(sizeof(*error), GFP_ATOMIC);
1462         if (error == NULL)
1463                 return NULL;
1464
1465         error->dovsta = intel_de_read(dev_priv, DOVSTA);
1466         error->isr = intel_de_read(dev_priv, GEN2_ISR);
1467         error->base = overlay->flip_addr;
1468
1469         memcpy_fromio(&error->regs, overlay->regs, sizeof(error->regs));
1470
1471         return error;
1472 }
1473
1474 void
1475 intel_overlay_print_error_state(struct drm_i915_error_state_buf *m,
1476                                 struct intel_overlay_error_state *error)
1477 {
1478         i915_error_printf(m, "Overlay, status: 0x%08x, interrupt: 0x%08x\n",
1479                           error->dovsta, error->isr);
1480         i915_error_printf(m, "  Register file at 0x%08lx:\n",
1481                           error->base);
1482
1483 #define P(x) i915_error_printf(m, "    " #x ":  0x%08x\n", error->regs.x)
1484         P(OBUF_0Y);
1485         P(OBUF_1Y);
1486         P(OBUF_0U);
1487         P(OBUF_0V);
1488         P(OBUF_1U);
1489         P(OBUF_1V);
1490         P(OSTRIDE);
1491         P(YRGB_VPH);
1492         P(UV_VPH);
1493         P(HORZ_PH);
1494         P(INIT_PHS);
1495         P(DWINPOS);
1496         P(DWINSZ);
1497         P(SWIDTH);
1498         P(SWIDTHSW);
1499         P(SHEIGHT);
1500         P(YRGBSCALE);
1501         P(UVSCALE);
1502         P(OCLRC0);
1503         P(OCLRC1);
1504         P(DCLRKV);
1505         P(DCLRKM);
1506         P(SCLRKVH);
1507         P(SCLRKVL);
1508         P(SCLRKEN);
1509         P(OCONFIG);
1510         P(OCMD);
1511         P(OSTART_0Y);
1512         P(OSTART_1Y);
1513         P(OSTART_0U);
1514         P(OSTART_0V);
1515         P(OSTART_1U);
1516         P(OSTART_1V);
1517         P(OTILEOFF_0Y);
1518         P(OTILEOFF_1Y);
1519         P(OTILEOFF_0U);
1520         P(OTILEOFF_0V);
1521         P(OTILEOFF_1U);
1522         P(OTILEOFF_1V);
1523         P(FASTHSCALE);
1524         P(UVSCALEV);
1525 #undef P
1526 }
1527
1528 #endif