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_internal.h"
32 #include "gem/i915_gem_pm.h"
33 #include "gt/intel_gpu_commands.h"
34 #include "gt/intel_ring.h"
35 
36 #include "i915_drv.h"
37 #include "i915_reg.h"
38 #include "intel_de.h"
39 #include "intel_display_types.h"
40 #include "intel_frontbuffer.h"
41 #include "intel_overlay.h"
42 #include "intel_pci_config.h"
43 
44 /* Limits for overlay size. According to intel doc, the real limits are:
45  * Y width: 4095, UV width (planar): 2047, Y height: 2047,
46  * UV width (planar): * 1023. But the xorg thinks 2048 for height and width. Use
47  * the mininum of both.  */
48 #define IMAGE_MAX_WIDTH		2048
49 #define IMAGE_MAX_HEIGHT	2046 /* 2 * 1023 */
50 /* on 830 and 845 these large limits result in the card hanging */
51 #define IMAGE_MAX_WIDTH_LEGACY	1024
52 #define IMAGE_MAX_HEIGHT_LEGACY	1088
53 
54 /* overlay register definitions */
55 /* OCMD register */
56 #define OCMD_TILED_SURFACE	(0x1<<19)
57 #define OCMD_MIRROR_MASK	(0x3<<17)
58 #define OCMD_MIRROR_MODE	(0x3<<17)
59 #define OCMD_MIRROR_HORIZONTAL	(0x1<<17)
60 #define OCMD_MIRROR_VERTICAL	(0x2<<17)
61 #define OCMD_MIRROR_BOTH	(0x3<<17)
62 #define OCMD_BYTEORDER_MASK	(0x3<<14) /* zero for YUYV or FOURCC YUY2 */
63 #define OCMD_UV_SWAP		(0x1<<14) /* YVYU */
64 #define OCMD_Y_SWAP		(0x2<<14) /* UYVY or FOURCC UYVY */
65 #define OCMD_Y_AND_UV_SWAP	(0x3<<14) /* VYUY */
66 #define OCMD_SOURCE_FORMAT_MASK (0xf<<10)
67 #define OCMD_RGB_888		(0x1<<10) /* not in i965 Intel docs */
68 #define OCMD_RGB_555		(0x2<<10) /* not in i965 Intel docs */
69 #define OCMD_RGB_565		(0x3<<10) /* not in i965 Intel docs */
70 #define OCMD_YUV_422_PACKED	(0x8<<10)
71 #define OCMD_YUV_411_PACKED	(0x9<<10) /* not in i965 Intel docs */
72 #define OCMD_YUV_420_PLANAR	(0xc<<10)
73 #define OCMD_YUV_422_PLANAR	(0xd<<10)
74 #define OCMD_YUV_410_PLANAR	(0xe<<10) /* also 411 */
75 #define OCMD_TVSYNCFLIP_PARITY	(0x1<<9)
76 #define OCMD_TVSYNCFLIP_ENABLE	(0x1<<7)
77 #define OCMD_BUF_TYPE_MASK	(0x1<<5)
78 #define OCMD_BUF_TYPE_FRAME	(0x0<<5)
79 #define OCMD_BUF_TYPE_FIELD	(0x1<<5)
80 #define OCMD_TEST_MODE		(0x1<<4)
81 #define OCMD_BUFFER_SELECT	(0x3<<2)
82 #define OCMD_BUFFER0		(0x0<<2)
83 #define OCMD_BUFFER1		(0x1<<2)
84 #define OCMD_FIELD_SELECT	(0x1<<2)
85 #define OCMD_FIELD0		(0x0<<1)
86 #define OCMD_FIELD1		(0x1<<1)
87 #define OCMD_ENABLE		(0x1<<0)
88 
89 /* OCONFIG register */
90 #define OCONF_PIPE_MASK		(0x1<<18)
91 #define OCONF_PIPE_A		(0x0<<18)
92 #define OCONF_PIPE_B		(0x1<<18)
93 #define OCONF_GAMMA2_ENABLE	(0x1<<16)
94 #define OCONF_CSC_MODE_BT601	(0x0<<5)
95 #define OCONF_CSC_MODE_BT709	(0x1<<5)
96 #define OCONF_CSC_BYPASS	(0x1<<4)
97 #define OCONF_CC_OUT_8BIT	(0x1<<3)
98 #define OCONF_TEST_MODE		(0x1<<2)
99 #define OCONF_THREE_LINE_BUFFER	(0x1<<0)
100 #define OCONF_TWO_LINE_BUFFER	(0x0<<0)
101 
102 /* DCLRKM (dst-key) register */
103 #define DST_KEY_ENABLE		(0x1<<31)
104 #define CLK_RGB24_MASK		0x0
105 #define CLK_RGB16_MASK		0x070307
106 #define CLK_RGB15_MASK		0x070707
107 
108 #define RGB30_TO_COLORKEY(c) \
109 	((((c) & 0x3fc00000) >> 6) | (((c) & 0x000ff000) >> 4) | (((c) & 0x000003fc) >> 2))
110 #define RGB16_TO_COLORKEY(c) \
111 	((((c) & 0xf800) << 8) | (((c) & 0x07e0) << 5) | (((c) & 0x001f) << 3))
112 #define RGB15_TO_COLORKEY(c) \
113 	((((c) & 0x7c00) << 9) | (((c) & 0x03e0) << 6) | (((c) & 0x001f) << 3))
114 #define RGB8I_TO_COLORKEY(c) \
115 	((((c) & 0xff) << 16) | (((c) & 0xff) << 8) | (((c) & 0xff) << 0))
116 
117 /* overlay flip addr flag */
118 #define OFC_UPDATE		0x1
119 
120 /* polyphase filter coefficients */
121 #define N_HORIZ_Y_TAPS          5
122 #define N_VERT_Y_TAPS           3
123 #define N_HORIZ_UV_TAPS         3
124 #define N_VERT_UV_TAPS          3
125 #define N_PHASES                17
126 #define MAX_TAPS                5
127 
128 /* memory bufferd overlay registers */
129 struct overlay_registers {
130 	u32 OBUF_0Y;
131 	u32 OBUF_1Y;
132 	u32 OBUF_0U;
133 	u32 OBUF_0V;
134 	u32 OBUF_1U;
135 	u32 OBUF_1V;
136 	u32 OSTRIDE;
137 	u32 YRGB_VPH;
138 	u32 UV_VPH;
139 	u32 HORZ_PH;
140 	u32 INIT_PHS;
141 	u32 DWINPOS;
142 	u32 DWINSZ;
143 	u32 SWIDTH;
144 	u32 SWIDTHSW;
145 	u32 SHEIGHT;
146 	u32 YRGBSCALE;
147 	u32 UVSCALE;
148 	u32 OCLRC0;
149 	u32 OCLRC1;
150 	u32 DCLRKV;
151 	u32 DCLRKM;
152 	u32 SCLRKVH;
153 	u32 SCLRKVL;
154 	u32 SCLRKEN;
155 	u32 OCONFIG;
156 	u32 OCMD;
157 	u32 RESERVED1; /* 0x6C */
158 	u32 OSTART_0Y;
159 	u32 OSTART_1Y;
160 	u32 OSTART_0U;
161 	u32 OSTART_0V;
162 	u32 OSTART_1U;
163 	u32 OSTART_1V;
164 	u32 OTILEOFF_0Y;
165 	u32 OTILEOFF_1Y;
166 	u32 OTILEOFF_0U;
167 	u32 OTILEOFF_0V;
168 	u32 OTILEOFF_1U;
169 	u32 OTILEOFF_1V;
170 	u32 FASTHSCALE; /* 0xA0 */
171 	u32 UVSCALEV; /* 0xA4 */
172 	u32 RESERVEDC[(0x200 - 0xA8) / 4]; /* 0xA8 - 0x1FC */
173 	u16 Y_VCOEFS[N_VERT_Y_TAPS * N_PHASES]; /* 0x200 */
174 	u16 RESERVEDD[0x100 / 2 - N_VERT_Y_TAPS * N_PHASES];
175 	u16 Y_HCOEFS[N_HORIZ_Y_TAPS * N_PHASES]; /* 0x300 */
176 	u16 RESERVEDE[0x200 / 2 - N_HORIZ_Y_TAPS * N_PHASES];
177 	u16 UV_VCOEFS[N_VERT_UV_TAPS * N_PHASES]; /* 0x500 */
178 	u16 RESERVEDF[0x100 / 2 - N_VERT_UV_TAPS * N_PHASES];
179 	u16 UV_HCOEFS[N_HORIZ_UV_TAPS * N_PHASES]; /* 0x600 */
180 	u16 RESERVEDG[0x100 / 2 - N_HORIZ_UV_TAPS * N_PHASES];
181 };
182 
183 struct intel_overlay {
184 	struct drm_i915_private *i915;
185 	struct intel_context *context;
186 	struct intel_crtc *crtc;
187 	struct i915_vma *vma;
188 	struct i915_vma *old_vma;
189 	struct intel_frontbuffer *frontbuffer;
190 	bool active;
191 	bool pfit_active;
192 	u32 pfit_vscale_ratio; /* shifted-point number, (1<<12) == 1.0 */
193 	u32 color_key:24;
194 	u32 color_key_enabled:1;
195 	u32 brightness, contrast, saturation;
196 	u32 old_xscale, old_yscale;
197 	/* register access */
198 	struct drm_i915_gem_object *reg_bo;
199 	struct overlay_registers __iomem *regs;
200 	u32 flip_addr;
201 	/* flip handling */
202 	struct i915_active last_flip;
203 	void (*flip_complete)(struct intel_overlay *ovl);
204 };
205 
206 static void i830_overlay_clock_gating(struct drm_i915_private *dev_priv,
207 				      bool enable)
208 {
209 	struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
210 	u8 val;
211 
212 	/* WA_OVERLAY_CLKGATE:alm */
213 	if (enable)
214 		intel_de_write(dev_priv, DSPCLK_GATE_D, 0);
215 	else
216 		intel_de_write(dev_priv, DSPCLK_GATE_D,
217 			       OVRUNIT_CLOCK_GATE_DISABLE);
218 
219 	/* WA_DISABLE_L2CACHE_CLOCK_GATING:alm */
220 	pci_bus_read_config_byte(pdev->bus,
221 				 PCI_DEVFN(0, 0), I830_CLOCK_GATE, &val);
222 	if (enable)
223 		val &= ~I830_L2_CACHE_CLOCK_GATE_DISABLE;
224 	else
225 		val |= I830_L2_CACHE_CLOCK_GATE_DISABLE;
226 	pci_bus_write_config_byte(pdev->bus,
227 				  PCI_DEVFN(0, 0), I830_CLOCK_GATE, val);
228 }
229 
230 static struct i915_request *
231 alloc_request(struct intel_overlay *overlay, void (*fn)(struct intel_overlay *))
232 {
233 	struct i915_request *rq;
234 	int err;
235 
236 	overlay->flip_complete = fn;
237 
238 	rq = i915_request_create(overlay->context);
239 	if (IS_ERR(rq))
240 		return rq;
241 
242 	err = i915_active_add_request(&overlay->last_flip, rq);
243 	if (err) {
244 		i915_request_add(rq);
245 		return ERR_PTR(err);
246 	}
247 
248 	return rq;
249 }
250 
251 /* overlay needs to be disable in OCMD reg */
252 static int intel_overlay_on(struct intel_overlay *overlay)
253 {
254 	struct drm_i915_private *dev_priv = overlay->i915;
255 	struct i915_request *rq;
256 	u32 *cs;
257 
258 	drm_WARN_ON(&dev_priv->drm, overlay->active);
259 
260 	rq = alloc_request(overlay, NULL);
261 	if (IS_ERR(rq))
262 		return PTR_ERR(rq);
263 
264 	cs = intel_ring_begin(rq, 4);
265 	if (IS_ERR(cs)) {
266 		i915_request_add(rq);
267 		return PTR_ERR(cs);
268 	}
269 
270 	overlay->active = true;
271 
272 	if (IS_I830(dev_priv))
273 		i830_overlay_clock_gating(dev_priv, false);
274 
275 	*cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_ON;
276 	*cs++ = overlay->flip_addr | OFC_UPDATE;
277 	*cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
278 	*cs++ = MI_NOOP;
279 	intel_ring_advance(rq, cs);
280 
281 	i915_request_add(rq);
282 
283 	return i915_active_wait(&overlay->last_flip);
284 }
285 
286 static void intel_overlay_flip_prepare(struct intel_overlay *overlay,
287 				       struct i915_vma *vma)
288 {
289 	enum pipe pipe = overlay->crtc->pipe;
290 	struct intel_frontbuffer *frontbuffer = NULL;
291 
292 	drm_WARN_ON(&overlay->i915->drm, overlay->old_vma);
293 
294 	if (vma)
295 		frontbuffer = intel_frontbuffer_get(vma->obj);
296 
297 	intel_frontbuffer_track(overlay->frontbuffer, frontbuffer,
298 				INTEL_FRONTBUFFER_OVERLAY(pipe));
299 
300 	if (overlay->frontbuffer)
301 		intel_frontbuffer_put(overlay->frontbuffer);
302 	overlay->frontbuffer = frontbuffer;
303 
304 	intel_frontbuffer_flip_prepare(overlay->i915,
305 				       INTEL_FRONTBUFFER_OVERLAY(pipe));
306 
307 	overlay->old_vma = overlay->vma;
308 	if (vma)
309 		overlay->vma = i915_vma_get(vma);
310 	else
311 		overlay->vma = NULL;
312 }
313 
314 /* overlay needs to be enabled in OCMD reg */
315 static int intel_overlay_continue(struct intel_overlay *overlay,
316 				  struct i915_vma *vma,
317 				  bool load_polyphase_filter)
318 {
319 	struct drm_i915_private *dev_priv = overlay->i915;
320 	struct i915_request *rq;
321 	u32 flip_addr = overlay->flip_addr;
322 	u32 tmp, *cs;
323 
324 	drm_WARN_ON(&dev_priv->drm, !overlay->active);
325 
326 	if (load_polyphase_filter)
327 		flip_addr |= OFC_UPDATE;
328 
329 	/* check for underruns */
330 	tmp = intel_de_read(dev_priv, DOVSTA);
331 	if (tmp & (1 << 17))
332 		drm_dbg(&dev_priv->drm, "overlay underrun, DOVSTA: %x\n", tmp);
333 
334 	rq = alloc_request(overlay, NULL);
335 	if (IS_ERR(rq))
336 		return PTR_ERR(rq);
337 
338 	cs = intel_ring_begin(rq, 2);
339 	if (IS_ERR(cs)) {
340 		i915_request_add(rq);
341 		return PTR_ERR(cs);
342 	}
343 
344 	*cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE;
345 	*cs++ = flip_addr;
346 	intel_ring_advance(rq, cs);
347 
348 	intel_overlay_flip_prepare(overlay, vma);
349 	i915_request_add(rq);
350 
351 	return 0;
352 }
353 
354 static void intel_overlay_release_old_vma(struct intel_overlay *overlay)
355 {
356 	struct i915_vma *vma;
357 
358 	vma = fetch_and_zero(&overlay->old_vma);
359 	if (drm_WARN_ON(&overlay->i915->drm, !vma))
360 		return;
361 
362 	intel_frontbuffer_flip_complete(overlay->i915,
363 					INTEL_FRONTBUFFER_OVERLAY(overlay->crtc->pipe));
364 
365 	i915_vma_unpin(vma);
366 	i915_vma_put(vma);
367 }
368 
369 static void
370 intel_overlay_release_old_vid_tail(struct intel_overlay *overlay)
371 {
372 	intel_overlay_release_old_vma(overlay);
373 }
374 
375 static void intel_overlay_off_tail(struct intel_overlay *overlay)
376 {
377 	struct drm_i915_private *dev_priv = overlay->i915;
378 
379 	intel_overlay_release_old_vma(overlay);
380 
381 	overlay->crtc->overlay = NULL;
382 	overlay->crtc = NULL;
383 	overlay->active = false;
384 
385 	if (IS_I830(dev_priv))
386 		i830_overlay_clock_gating(dev_priv, true);
387 }
388 
389 static void intel_overlay_last_flip_retire(struct i915_active *active)
390 {
391 	struct intel_overlay *overlay =
392 		container_of(active, typeof(*overlay), last_flip);
393 
394 	if (overlay->flip_complete)
395 		overlay->flip_complete(overlay);
396 }
397 
398 /* overlay needs to be disabled in OCMD reg */
399 static int intel_overlay_off(struct intel_overlay *overlay)
400 {
401 	struct i915_request *rq;
402 	u32 *cs, flip_addr = overlay->flip_addr;
403 
404 	drm_WARN_ON(&overlay->i915->drm, !overlay->active);
405 
406 	/* According to intel docs the overlay hw may hang (when switching
407 	 * off) without loading the filter coeffs. It is however unclear whether
408 	 * this applies to the disabling of the overlay or to the switching off
409 	 * of the hw. Do it in both cases */
410 	flip_addr |= OFC_UPDATE;
411 
412 	rq = alloc_request(overlay, intel_overlay_off_tail);
413 	if (IS_ERR(rq))
414 		return PTR_ERR(rq);
415 
416 	cs = intel_ring_begin(rq, 6);
417 	if (IS_ERR(cs)) {
418 		i915_request_add(rq);
419 		return PTR_ERR(cs);
420 	}
421 
422 	/* wait for overlay to go idle */
423 	*cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE;
424 	*cs++ = flip_addr;
425 	*cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
426 
427 	/* turn overlay off */
428 	*cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_OFF;
429 	*cs++ = flip_addr;
430 	*cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
431 
432 	intel_ring_advance(rq, cs);
433 
434 	intel_overlay_flip_prepare(overlay, NULL);
435 	i915_request_add(rq);
436 
437 	return i915_active_wait(&overlay->last_flip);
438 }
439 
440 /* recover from an interruption due to a signal
441  * We have to be careful not to repeat work forever an make forward progess. */
442 static int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay)
443 {
444 	return i915_active_wait(&overlay->last_flip);
445 }
446 
447 /* Wait for pending overlay flip and release old frame.
448  * Needs to be called before the overlay register are changed
449  * via intel_overlay_(un)map_regs
450  */
451 static int intel_overlay_release_old_vid(struct intel_overlay *overlay)
452 {
453 	struct drm_i915_private *dev_priv = overlay->i915;
454 	struct i915_request *rq;
455 	u32 *cs;
456 
457 	/*
458 	 * Only wait if there is actually an old frame to release to
459 	 * guarantee forward progress.
460 	 */
461 	if (!overlay->old_vma)
462 		return 0;
463 
464 	if (!(intel_de_read(dev_priv, GEN2_ISR) & I915_OVERLAY_PLANE_FLIP_PENDING_INTERRUPT)) {
465 		intel_overlay_release_old_vid_tail(overlay);
466 		return 0;
467 	}
468 
469 	rq = alloc_request(overlay, intel_overlay_release_old_vid_tail);
470 	if (IS_ERR(rq))
471 		return PTR_ERR(rq);
472 
473 	cs = intel_ring_begin(rq, 2);
474 	if (IS_ERR(cs)) {
475 		i915_request_add(rq);
476 		return PTR_ERR(cs);
477 	}
478 
479 	*cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
480 	*cs++ = MI_NOOP;
481 	intel_ring_advance(rq, cs);
482 
483 	i915_request_add(rq);
484 
485 	return i915_active_wait(&overlay->last_flip);
486 }
487 
488 void intel_overlay_reset(struct drm_i915_private *dev_priv)
489 {
490 	struct intel_overlay *overlay = dev_priv->overlay;
491 
492 	if (!overlay)
493 		return;
494 
495 	overlay->old_xscale = 0;
496 	overlay->old_yscale = 0;
497 	overlay->crtc = NULL;
498 	overlay->active = false;
499 }
500 
501 static int packed_depth_bytes(u32 format)
502 {
503 	switch (format & I915_OVERLAY_DEPTH_MASK) {
504 	case I915_OVERLAY_YUV422:
505 		return 4;
506 	case I915_OVERLAY_YUV411:
507 		/* return 6; not implemented */
508 	default:
509 		return -EINVAL;
510 	}
511 }
512 
513 static int packed_width_bytes(u32 format, short width)
514 {
515 	switch (format & I915_OVERLAY_DEPTH_MASK) {
516 	case I915_OVERLAY_YUV422:
517 		return width << 1;
518 	default:
519 		return -EINVAL;
520 	}
521 }
522 
523 static int uv_hsubsampling(u32 format)
524 {
525 	switch (format & I915_OVERLAY_DEPTH_MASK) {
526 	case I915_OVERLAY_YUV422:
527 	case I915_OVERLAY_YUV420:
528 		return 2;
529 	case I915_OVERLAY_YUV411:
530 	case I915_OVERLAY_YUV410:
531 		return 4;
532 	default:
533 		return -EINVAL;
534 	}
535 }
536 
537 static int uv_vsubsampling(u32 format)
538 {
539 	switch (format & I915_OVERLAY_DEPTH_MASK) {
540 	case I915_OVERLAY_YUV420:
541 	case I915_OVERLAY_YUV410:
542 		return 2;
543 	case I915_OVERLAY_YUV422:
544 	case I915_OVERLAY_YUV411:
545 		return 1;
546 	default:
547 		return -EINVAL;
548 	}
549 }
550 
551 static u32 calc_swidthsw(struct drm_i915_private *dev_priv, u32 offset, u32 width)
552 {
553 	u32 sw;
554 
555 	if (DISPLAY_VER(dev_priv) == 2)
556 		sw = ALIGN((offset & 31) + width, 32);
557 	else
558 		sw = ALIGN((offset & 63) + width, 64);
559 
560 	if (sw == 0)
561 		return 0;
562 
563 	return (sw - 32) >> 3;
564 }
565 
566 static const u16 y_static_hcoeffs[N_PHASES][N_HORIZ_Y_TAPS] = {
567 	[ 0] = { 0x3000, 0xb4a0, 0x1930, 0x1920, 0xb4a0, },
568 	[ 1] = { 0x3000, 0xb500, 0x19d0, 0x1880, 0xb440, },
569 	[ 2] = { 0x3000, 0xb540, 0x1a88, 0x2f80, 0xb3e0, },
570 	[ 3] = { 0x3000, 0xb580, 0x1b30, 0x2e20, 0xb380, },
571 	[ 4] = { 0x3000, 0xb5c0, 0x1bd8, 0x2cc0, 0xb320, },
572 	[ 5] = { 0x3020, 0xb5e0, 0x1c60, 0x2b80, 0xb2c0, },
573 	[ 6] = { 0x3020, 0xb5e0, 0x1cf8, 0x2a20, 0xb260, },
574 	[ 7] = { 0x3020, 0xb5e0, 0x1d80, 0x28e0, 0xb200, },
575 	[ 8] = { 0x3020, 0xb5c0, 0x1e08, 0x3f40, 0xb1c0, },
576 	[ 9] = { 0x3020, 0xb580, 0x1e78, 0x3ce0, 0xb160, },
577 	[10] = { 0x3040, 0xb520, 0x1ed8, 0x3aa0, 0xb120, },
578 	[11] = { 0x3040, 0xb4a0, 0x1f30, 0x3880, 0xb0e0, },
579 	[12] = { 0x3040, 0xb400, 0x1f78, 0x3680, 0xb0a0, },
580 	[13] = { 0x3020, 0xb340, 0x1fb8, 0x34a0, 0xb060, },
581 	[14] = { 0x3020, 0xb240, 0x1fe0, 0x32e0, 0xb040, },
582 	[15] = { 0x3020, 0xb140, 0x1ff8, 0x3160, 0xb020, },
583 	[16] = { 0xb000, 0x3000, 0x0800, 0x3000, 0xb000, },
584 };
585 
586 static const u16 uv_static_hcoeffs[N_PHASES][N_HORIZ_UV_TAPS] = {
587 	[ 0] = { 0x3000, 0x1800, 0x1800, },
588 	[ 1] = { 0xb000, 0x18d0, 0x2e60, },
589 	[ 2] = { 0xb000, 0x1990, 0x2ce0, },
590 	[ 3] = { 0xb020, 0x1a68, 0x2b40, },
591 	[ 4] = { 0xb040, 0x1b20, 0x29e0, },
592 	[ 5] = { 0xb060, 0x1bd8, 0x2880, },
593 	[ 6] = { 0xb080, 0x1c88, 0x3e60, },
594 	[ 7] = { 0xb0a0, 0x1d28, 0x3c00, },
595 	[ 8] = { 0xb0c0, 0x1db8, 0x39e0, },
596 	[ 9] = { 0xb0e0, 0x1e40, 0x37e0, },
597 	[10] = { 0xb100, 0x1eb8, 0x3620, },
598 	[11] = { 0xb100, 0x1f18, 0x34a0, },
599 	[12] = { 0xb100, 0x1f68, 0x3360, },
600 	[13] = { 0xb0e0, 0x1fa8, 0x3240, },
601 	[14] = { 0xb0c0, 0x1fe0, 0x3140, },
602 	[15] = { 0xb060, 0x1ff0, 0x30a0, },
603 	[16] = { 0x3000, 0x0800, 0x3000, },
604 };
605 
606 static void update_polyphase_filter(struct overlay_registers __iomem *regs)
607 {
608 	memcpy_toio(regs->Y_HCOEFS, y_static_hcoeffs, sizeof(y_static_hcoeffs));
609 	memcpy_toio(regs->UV_HCOEFS, uv_static_hcoeffs,
610 		    sizeof(uv_static_hcoeffs));
611 }
612 
613 static bool update_scaling_factors(struct intel_overlay *overlay,
614 				   struct overlay_registers __iomem *regs,
615 				   struct drm_intel_overlay_put_image *params)
616 {
617 	/* fixed point with a 12 bit shift */
618 	u32 xscale, yscale, xscale_UV, yscale_UV;
619 #define FP_SHIFT 12
620 #define FRACT_MASK 0xfff
621 	bool scale_changed = false;
622 	int uv_hscale = uv_hsubsampling(params->flags);
623 	int uv_vscale = uv_vsubsampling(params->flags);
624 
625 	if (params->dst_width > 1)
626 		xscale = ((params->src_scan_width - 1) << FP_SHIFT) /
627 			params->dst_width;
628 	else
629 		xscale = 1 << FP_SHIFT;
630 
631 	if (params->dst_height > 1)
632 		yscale = ((params->src_scan_height - 1) << FP_SHIFT) /
633 			params->dst_height;
634 	else
635 		yscale = 1 << FP_SHIFT;
636 
637 	/*if (params->format & I915_OVERLAY_YUV_PLANAR) {*/
638 	xscale_UV = xscale/uv_hscale;
639 	yscale_UV = yscale/uv_vscale;
640 	/* make the Y scale to UV scale ratio an exact multiply */
641 	xscale = xscale_UV * uv_hscale;
642 	yscale = yscale_UV * uv_vscale;
643 	/*} else {
644 	  xscale_UV = 0;
645 	  yscale_UV = 0;
646 	  }*/
647 
648 	if (xscale != overlay->old_xscale || yscale != overlay->old_yscale)
649 		scale_changed = true;
650 	overlay->old_xscale = xscale;
651 	overlay->old_yscale = yscale;
652 
653 	iowrite32(((yscale & FRACT_MASK) << 20) |
654 		  ((xscale >> FP_SHIFT)  << 16) |
655 		  ((xscale & FRACT_MASK) << 3),
656 		 &regs->YRGBSCALE);
657 
658 	iowrite32(((yscale_UV & FRACT_MASK) << 20) |
659 		  ((xscale_UV >> FP_SHIFT)  << 16) |
660 		  ((xscale_UV & FRACT_MASK) << 3),
661 		 &regs->UVSCALE);
662 
663 	iowrite32((((yscale    >> FP_SHIFT) << 16) |
664 		   ((yscale_UV >> FP_SHIFT) << 0)),
665 		 &regs->UVSCALEV);
666 
667 	if (scale_changed)
668 		update_polyphase_filter(regs);
669 
670 	return scale_changed;
671 }
672 
673 static void update_colorkey(struct intel_overlay *overlay,
674 			    struct overlay_registers __iomem *regs)
675 {
676 	const struct intel_plane_state *state =
677 		to_intel_plane_state(overlay->crtc->base.primary->state);
678 	u32 key = overlay->color_key;
679 	u32 format = 0;
680 	u32 flags = 0;
681 
682 	if (overlay->color_key_enabled)
683 		flags |= DST_KEY_ENABLE;
684 
685 	if (state->uapi.visible)
686 		format = state->hw.fb->format->format;
687 
688 	switch (format) {
689 	case DRM_FORMAT_C8:
690 		key = RGB8I_TO_COLORKEY(key);
691 		flags |= CLK_RGB24_MASK;
692 		break;
693 	case DRM_FORMAT_XRGB1555:
694 		key = RGB15_TO_COLORKEY(key);
695 		flags |= CLK_RGB15_MASK;
696 		break;
697 	case DRM_FORMAT_RGB565:
698 		key = RGB16_TO_COLORKEY(key);
699 		flags |= CLK_RGB16_MASK;
700 		break;
701 	case DRM_FORMAT_XRGB2101010:
702 	case DRM_FORMAT_XBGR2101010:
703 		key = RGB30_TO_COLORKEY(key);
704 		flags |= CLK_RGB24_MASK;
705 		break;
706 	default:
707 		flags |= CLK_RGB24_MASK;
708 		break;
709 	}
710 
711 	iowrite32(key, &regs->DCLRKV);
712 	iowrite32(flags, &regs->DCLRKM);
713 }
714 
715 static u32 overlay_cmd_reg(struct drm_intel_overlay_put_image *params)
716 {
717 	u32 cmd = OCMD_ENABLE | OCMD_BUF_TYPE_FRAME | OCMD_BUFFER0;
718 
719 	if (params->flags & I915_OVERLAY_YUV_PLANAR) {
720 		switch (params->flags & I915_OVERLAY_DEPTH_MASK) {
721 		case I915_OVERLAY_YUV422:
722 			cmd |= OCMD_YUV_422_PLANAR;
723 			break;
724 		case I915_OVERLAY_YUV420:
725 			cmd |= OCMD_YUV_420_PLANAR;
726 			break;
727 		case I915_OVERLAY_YUV411:
728 		case I915_OVERLAY_YUV410:
729 			cmd |= OCMD_YUV_410_PLANAR;
730 			break;
731 		}
732 	} else { /* YUV packed */
733 		switch (params->flags & I915_OVERLAY_DEPTH_MASK) {
734 		case I915_OVERLAY_YUV422:
735 			cmd |= OCMD_YUV_422_PACKED;
736 			break;
737 		case I915_OVERLAY_YUV411:
738 			cmd |= OCMD_YUV_411_PACKED;
739 			break;
740 		}
741 
742 		switch (params->flags & I915_OVERLAY_SWAP_MASK) {
743 		case I915_OVERLAY_NO_SWAP:
744 			break;
745 		case I915_OVERLAY_UV_SWAP:
746 			cmd |= OCMD_UV_SWAP;
747 			break;
748 		case I915_OVERLAY_Y_SWAP:
749 			cmd |= OCMD_Y_SWAP;
750 			break;
751 		case I915_OVERLAY_Y_AND_UV_SWAP:
752 			cmd |= OCMD_Y_AND_UV_SWAP;
753 			break;
754 		}
755 	}
756 
757 	return cmd;
758 }
759 
760 static struct i915_vma *intel_overlay_pin_fb(struct drm_i915_gem_object *new_bo)
761 {
762 	struct i915_gem_ww_ctx ww;
763 	struct i915_vma *vma;
764 	int ret;
765 
766 	i915_gem_ww_ctx_init(&ww, true);
767 retry:
768 	ret = i915_gem_object_lock(new_bo, &ww);
769 	if (!ret) {
770 		vma = i915_gem_object_pin_to_display_plane(new_bo, &ww, 0,
771 							   NULL, PIN_MAPPABLE);
772 		ret = PTR_ERR_OR_ZERO(vma);
773 	}
774 	if (ret == -EDEADLK) {
775 		ret = i915_gem_ww_ctx_backoff(&ww);
776 		if (!ret)
777 			goto retry;
778 	}
779 	i915_gem_ww_ctx_fini(&ww);
780 	if (ret)
781 		return ERR_PTR(ret);
782 
783 	return vma;
784 }
785 
786 static int intel_overlay_do_put_image(struct intel_overlay *overlay,
787 				      struct drm_i915_gem_object *new_bo,
788 				      struct drm_intel_overlay_put_image *params)
789 {
790 	struct overlay_registers __iomem *regs = overlay->regs;
791 	struct drm_i915_private *dev_priv = overlay->i915;
792 	u32 swidth, swidthsw, sheight, ostride;
793 	enum pipe pipe = overlay->crtc->pipe;
794 	bool scale_changed = false;
795 	struct i915_vma *vma;
796 	int ret, tmp_width;
797 
798 	drm_WARN_ON(&dev_priv->drm,
799 		    !drm_modeset_is_locked(&dev_priv->drm.mode_config.connection_mutex));
800 
801 	ret = intel_overlay_release_old_vid(overlay);
802 	if (ret != 0)
803 		return ret;
804 
805 	atomic_inc(&dev_priv->gpu_error.pending_fb_pin);
806 
807 	vma = intel_overlay_pin_fb(new_bo);
808 	if (IS_ERR(vma)) {
809 		ret = PTR_ERR(vma);
810 		goto out_pin_section;
811 	}
812 
813 	i915_gem_object_flush_frontbuffer(new_bo, ORIGIN_DIRTYFB);
814 
815 	if (!overlay->active) {
816 		const struct intel_crtc_state *crtc_state =
817 			overlay->crtc->config;
818 		u32 oconfig = 0;
819 
820 		if (crtc_state->gamma_enable &&
821 		    crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT)
822 			oconfig |= OCONF_CC_OUT_8BIT;
823 		if (crtc_state->gamma_enable)
824 			oconfig |= OCONF_GAMMA2_ENABLE;
825 		if (DISPLAY_VER(dev_priv) == 4)
826 			oconfig |= OCONF_CSC_MODE_BT709;
827 		oconfig |= pipe == 0 ?
828 			OCONF_PIPE_A : OCONF_PIPE_B;
829 		iowrite32(oconfig, &regs->OCONFIG);
830 
831 		ret = intel_overlay_on(overlay);
832 		if (ret != 0)
833 			goto out_unpin;
834 	}
835 
836 	iowrite32(params->dst_y << 16 | params->dst_x, &regs->DWINPOS);
837 	iowrite32(params->dst_height << 16 | params->dst_width, &regs->DWINSZ);
838 
839 	if (params->flags & I915_OVERLAY_YUV_PACKED)
840 		tmp_width = packed_width_bytes(params->flags,
841 					       params->src_width);
842 	else
843 		tmp_width = params->src_width;
844 
845 	swidth = params->src_width;
846 	swidthsw = calc_swidthsw(dev_priv, params->offset_Y, tmp_width);
847 	sheight = params->src_height;
848 	iowrite32(i915_ggtt_offset(vma) + params->offset_Y, &regs->OBUF_0Y);
849 	ostride = params->stride_Y;
850 
851 	if (params->flags & I915_OVERLAY_YUV_PLANAR) {
852 		int uv_hscale = uv_hsubsampling(params->flags);
853 		int uv_vscale = uv_vsubsampling(params->flags);
854 		u32 tmp_U, tmp_V;
855 
856 		swidth |= (params->src_width / uv_hscale) << 16;
857 		sheight |= (params->src_height / uv_vscale) << 16;
858 
859 		tmp_U = calc_swidthsw(dev_priv, params->offset_U,
860 				      params->src_width / uv_hscale);
861 		tmp_V = calc_swidthsw(dev_priv, params->offset_V,
862 				      params->src_width / uv_hscale);
863 		swidthsw |= max(tmp_U, tmp_V) << 16;
864 
865 		iowrite32(i915_ggtt_offset(vma) + params->offset_U,
866 			  &regs->OBUF_0U);
867 		iowrite32(i915_ggtt_offset(vma) + params->offset_V,
868 			  &regs->OBUF_0V);
869 
870 		ostride |= params->stride_UV << 16;
871 	}
872 
873 	iowrite32(swidth, &regs->SWIDTH);
874 	iowrite32(swidthsw, &regs->SWIDTHSW);
875 	iowrite32(sheight, &regs->SHEIGHT);
876 	iowrite32(ostride, &regs->OSTRIDE);
877 
878 	scale_changed = update_scaling_factors(overlay, regs, params);
879 
880 	update_colorkey(overlay, regs);
881 
882 	iowrite32(overlay_cmd_reg(params), &regs->OCMD);
883 
884 	ret = intel_overlay_continue(overlay, vma, scale_changed);
885 	if (ret)
886 		goto out_unpin;
887 
888 	return 0;
889 
890 out_unpin:
891 	i915_vma_unpin(vma);
892 out_pin_section:
893 	atomic_dec(&dev_priv->gpu_error.pending_fb_pin);
894 
895 	return ret;
896 }
897 
898 int intel_overlay_switch_off(struct intel_overlay *overlay)
899 {
900 	struct drm_i915_private *dev_priv = overlay->i915;
901 	int ret;
902 
903 	drm_WARN_ON(&dev_priv->drm,
904 		    !drm_modeset_is_locked(&dev_priv->drm.mode_config.connection_mutex));
905 
906 	ret = intel_overlay_recover_from_interrupt(overlay);
907 	if (ret != 0)
908 		return ret;
909 
910 	if (!overlay->active)
911 		return 0;
912 
913 	ret = intel_overlay_release_old_vid(overlay);
914 	if (ret != 0)
915 		return ret;
916 
917 	iowrite32(0, &overlay->regs->OCMD);
918 
919 	return intel_overlay_off(overlay);
920 }
921 
922 static int check_overlay_possible_on_crtc(struct intel_overlay *overlay,
923 					  struct intel_crtc *crtc)
924 {
925 	if (!crtc->active)
926 		return -EINVAL;
927 
928 	/* can't use the overlay with double wide pipe */
929 	if (crtc->config->double_wide)
930 		return -EINVAL;
931 
932 	return 0;
933 }
934 
935 static void update_pfit_vscale_ratio(struct intel_overlay *overlay)
936 {
937 	struct drm_i915_private *dev_priv = overlay->i915;
938 	u32 pfit_control = intel_de_read(dev_priv, PFIT_CONTROL);
939 	u32 ratio;
940 
941 	/* XXX: This is not the same logic as in the xorg driver, but more in
942 	 * line with the intel documentation for the i965
943 	 */
944 	if (DISPLAY_VER(dev_priv) >= 4) {
945 		/* on i965 use the PGM reg to read out the autoscaler values */
946 		ratio = intel_de_read(dev_priv, PFIT_PGM_RATIOS) >> PFIT_VERT_SCALE_SHIFT_965;
947 	} else {
948 		if (pfit_control & VERT_AUTO_SCALE)
949 			ratio = intel_de_read(dev_priv, PFIT_AUTO_RATIOS);
950 		else
951 			ratio = intel_de_read(dev_priv, PFIT_PGM_RATIOS);
952 		ratio >>= PFIT_VERT_SCALE_SHIFT;
953 	}
954 
955 	overlay->pfit_vscale_ratio = ratio;
956 }
957 
958 static int check_overlay_dst(struct intel_overlay *overlay,
959 			     struct drm_intel_overlay_put_image *rec)
960 {
961 	const struct intel_crtc_state *crtc_state =
962 		overlay->crtc->config;
963 	struct drm_rect req, clipped;
964 
965 	drm_rect_init(&req, rec->dst_x, rec->dst_y,
966 		      rec->dst_width, rec->dst_height);
967 
968 	clipped = req;
969 	drm_rect_intersect(&clipped, &crtc_state->pipe_src);
970 
971 	if (!drm_rect_visible(&clipped) ||
972 	    !drm_rect_equals(&clipped, &req))
973 		return -EINVAL;
974 
975 	return 0;
976 }
977 
978 static int check_overlay_scaling(struct drm_intel_overlay_put_image *rec)
979 {
980 	u32 tmp;
981 
982 	/* downscaling limit is 8.0 */
983 	tmp = ((rec->src_scan_height << 16) / rec->dst_height) >> 16;
984 	if (tmp > 7)
985 		return -EINVAL;
986 
987 	tmp = ((rec->src_scan_width << 16) / rec->dst_width) >> 16;
988 	if (tmp > 7)
989 		return -EINVAL;
990 
991 	return 0;
992 }
993 
994 static int check_overlay_src(struct drm_i915_private *dev_priv,
995 			     struct drm_intel_overlay_put_image *rec,
996 			     struct drm_i915_gem_object *new_bo)
997 {
998 	int uv_hscale = uv_hsubsampling(rec->flags);
999 	int uv_vscale = uv_vsubsampling(rec->flags);
1000 	u32 stride_mask;
1001 	int depth;
1002 	u32 tmp;
1003 
1004 	/* check src dimensions */
1005 	if (IS_I845G(dev_priv) || IS_I830(dev_priv)) {
1006 		if (rec->src_height > IMAGE_MAX_HEIGHT_LEGACY ||
1007 		    rec->src_width  > IMAGE_MAX_WIDTH_LEGACY)
1008 			return -EINVAL;
1009 	} else {
1010 		if (rec->src_height > IMAGE_MAX_HEIGHT ||
1011 		    rec->src_width  > IMAGE_MAX_WIDTH)
1012 			return -EINVAL;
1013 	}
1014 
1015 	/* better safe than sorry, use 4 as the maximal subsampling ratio */
1016 	if (rec->src_height < N_VERT_Y_TAPS*4 ||
1017 	    rec->src_width  < N_HORIZ_Y_TAPS*4)
1018 		return -EINVAL;
1019 
1020 	/* check alignment constraints */
1021 	switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
1022 	case I915_OVERLAY_RGB:
1023 		/* not implemented */
1024 		return -EINVAL;
1025 
1026 	case I915_OVERLAY_YUV_PACKED:
1027 		if (uv_vscale != 1)
1028 			return -EINVAL;
1029 
1030 		depth = packed_depth_bytes(rec->flags);
1031 		if (depth < 0)
1032 			return depth;
1033 
1034 		/* ignore UV planes */
1035 		rec->stride_UV = 0;
1036 		rec->offset_U = 0;
1037 		rec->offset_V = 0;
1038 		/* check pixel alignment */
1039 		if (rec->offset_Y % depth)
1040 			return -EINVAL;
1041 		break;
1042 
1043 	case I915_OVERLAY_YUV_PLANAR:
1044 		if (uv_vscale < 0 || uv_hscale < 0)
1045 			return -EINVAL;
1046 		/* no offset restrictions for planar formats */
1047 		break;
1048 
1049 	default:
1050 		return -EINVAL;
1051 	}
1052 
1053 	if (rec->src_width % uv_hscale)
1054 		return -EINVAL;
1055 
1056 	/* stride checking */
1057 	if (IS_I830(dev_priv) || IS_I845G(dev_priv))
1058 		stride_mask = 255;
1059 	else
1060 		stride_mask = 63;
1061 
1062 	if (rec->stride_Y & stride_mask || rec->stride_UV & stride_mask)
1063 		return -EINVAL;
1064 	if (DISPLAY_VER(dev_priv) == 4 && rec->stride_Y < 512)
1065 		return -EINVAL;
1066 
1067 	tmp = (rec->flags & I915_OVERLAY_TYPE_MASK) == I915_OVERLAY_YUV_PLANAR ?
1068 		4096 : 8192;
1069 	if (rec->stride_Y > tmp || rec->stride_UV > 2*1024)
1070 		return -EINVAL;
1071 
1072 	/* check buffer dimensions */
1073 	switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
1074 	case I915_OVERLAY_RGB:
1075 	case I915_OVERLAY_YUV_PACKED:
1076 		/* always 4 Y values per depth pixels */
1077 		if (packed_width_bytes(rec->flags, rec->src_width) > rec->stride_Y)
1078 			return -EINVAL;
1079 
1080 		tmp = rec->stride_Y*rec->src_height;
1081 		if (rec->offset_Y + tmp > new_bo->base.size)
1082 			return -EINVAL;
1083 		break;
1084 
1085 	case I915_OVERLAY_YUV_PLANAR:
1086 		if (rec->src_width > rec->stride_Y)
1087 			return -EINVAL;
1088 		if (rec->src_width/uv_hscale > rec->stride_UV)
1089 			return -EINVAL;
1090 
1091 		tmp = rec->stride_Y * rec->src_height;
1092 		if (rec->offset_Y + tmp > new_bo->base.size)
1093 			return -EINVAL;
1094 
1095 		tmp = rec->stride_UV * (rec->src_height / uv_vscale);
1096 		if (rec->offset_U + tmp > new_bo->base.size ||
1097 		    rec->offset_V + tmp > new_bo->base.size)
1098 			return -EINVAL;
1099 		break;
1100 	}
1101 
1102 	return 0;
1103 }
1104 
1105 int intel_overlay_put_image_ioctl(struct drm_device *dev, void *data,
1106 				  struct drm_file *file_priv)
1107 {
1108 	struct drm_intel_overlay_put_image *params = data;
1109 	struct drm_i915_private *dev_priv = to_i915(dev);
1110 	struct intel_overlay *overlay;
1111 	struct drm_crtc *drmmode_crtc;
1112 	struct intel_crtc *crtc;
1113 	struct drm_i915_gem_object *new_bo;
1114 	int ret;
1115 
1116 	overlay = dev_priv->overlay;
1117 	if (!overlay) {
1118 		drm_dbg(&dev_priv->drm, "userspace bug: no overlay\n");
1119 		return -ENODEV;
1120 	}
1121 
1122 	if (!(params->flags & I915_OVERLAY_ENABLE)) {
1123 		drm_modeset_lock_all(dev);
1124 		ret = intel_overlay_switch_off(overlay);
1125 		drm_modeset_unlock_all(dev);
1126 
1127 		return ret;
1128 	}
1129 
1130 	drmmode_crtc = drm_crtc_find(dev, file_priv, params->crtc_id);
1131 	if (!drmmode_crtc)
1132 		return -ENOENT;
1133 	crtc = to_intel_crtc(drmmode_crtc);
1134 
1135 	new_bo = i915_gem_object_lookup(file_priv, params->bo_handle);
1136 	if (!new_bo)
1137 		return -ENOENT;
1138 
1139 	drm_modeset_lock_all(dev);
1140 
1141 	if (i915_gem_object_is_tiled(new_bo)) {
1142 		drm_dbg_kms(&dev_priv->drm,
1143 			    "buffer used for overlay image can not be tiled\n");
1144 		ret = -EINVAL;
1145 		goto out_unlock;
1146 	}
1147 
1148 	ret = intel_overlay_recover_from_interrupt(overlay);
1149 	if (ret != 0)
1150 		goto out_unlock;
1151 
1152 	if (overlay->crtc != crtc) {
1153 		ret = intel_overlay_switch_off(overlay);
1154 		if (ret != 0)
1155 			goto out_unlock;
1156 
1157 		ret = check_overlay_possible_on_crtc(overlay, crtc);
1158 		if (ret != 0)
1159 			goto out_unlock;
1160 
1161 		overlay->crtc = crtc;
1162 		crtc->overlay = overlay;
1163 
1164 		/* line too wide, i.e. one-line-mode */
1165 		if (drm_rect_width(&crtc->config->pipe_src) > 1024 &&
1166 		    crtc->config->gmch_pfit.control & PFIT_ENABLE) {
1167 			overlay->pfit_active = true;
1168 			update_pfit_vscale_ratio(overlay);
1169 		} else
1170 			overlay->pfit_active = false;
1171 	}
1172 
1173 	ret = check_overlay_dst(overlay, params);
1174 	if (ret != 0)
1175 		goto out_unlock;
1176 
1177 	if (overlay->pfit_active) {
1178 		params->dst_y = (((u32)params->dst_y << 12) /
1179 				 overlay->pfit_vscale_ratio);
1180 		/* shifting right rounds downwards, so add 1 */
1181 		params->dst_height = (((u32)params->dst_height << 12) /
1182 				 overlay->pfit_vscale_ratio) + 1;
1183 	}
1184 
1185 	if (params->src_scan_height > params->src_height ||
1186 	    params->src_scan_width > params->src_width) {
1187 		ret = -EINVAL;
1188 		goto out_unlock;
1189 	}
1190 
1191 	ret = check_overlay_src(dev_priv, params, new_bo);
1192 	if (ret != 0)
1193 		goto out_unlock;
1194 
1195 	/* Check scaling after src size to prevent a divide-by-zero. */
1196 	ret = check_overlay_scaling(params);
1197 	if (ret != 0)
1198 		goto out_unlock;
1199 
1200 	ret = intel_overlay_do_put_image(overlay, new_bo, params);
1201 	if (ret != 0)
1202 		goto out_unlock;
1203 
1204 	drm_modeset_unlock_all(dev);
1205 	i915_gem_object_put(new_bo);
1206 
1207 	return 0;
1208 
1209 out_unlock:
1210 	drm_modeset_unlock_all(dev);
1211 	i915_gem_object_put(new_bo);
1212 
1213 	return ret;
1214 }
1215 
1216 static void update_reg_attrs(struct intel_overlay *overlay,
1217 			     struct overlay_registers __iomem *regs)
1218 {
1219 	iowrite32((overlay->contrast << 18) | (overlay->brightness & 0xff),
1220 		  &regs->OCLRC0);
1221 	iowrite32(overlay->saturation, &regs->OCLRC1);
1222 }
1223 
1224 static bool check_gamma_bounds(u32 gamma1, u32 gamma2)
1225 {
1226 	int i;
1227 
1228 	if (gamma1 & 0xff000000 || gamma2 & 0xff000000)
1229 		return false;
1230 
1231 	for (i = 0; i < 3; i++) {
1232 		if (((gamma1 >> i*8) & 0xff) >= ((gamma2 >> i*8) & 0xff))
1233 			return false;
1234 	}
1235 
1236 	return true;
1237 }
1238 
1239 static bool check_gamma5_errata(u32 gamma5)
1240 {
1241 	int i;
1242 
1243 	for (i = 0; i < 3; i++) {
1244 		if (((gamma5 >> i*8) & 0xff) == 0x80)
1245 			return false;
1246 	}
1247 
1248 	return true;
1249 }
1250 
1251 static int check_gamma(struct drm_intel_overlay_attrs *attrs)
1252 {
1253 	if (!check_gamma_bounds(0, attrs->gamma0) ||
1254 	    !check_gamma_bounds(attrs->gamma0, attrs->gamma1) ||
1255 	    !check_gamma_bounds(attrs->gamma1, attrs->gamma2) ||
1256 	    !check_gamma_bounds(attrs->gamma2, attrs->gamma3) ||
1257 	    !check_gamma_bounds(attrs->gamma3, attrs->gamma4) ||
1258 	    !check_gamma_bounds(attrs->gamma4, attrs->gamma5) ||
1259 	    !check_gamma_bounds(attrs->gamma5, 0x00ffffff))
1260 		return -EINVAL;
1261 
1262 	if (!check_gamma5_errata(attrs->gamma5))
1263 		return -EINVAL;
1264 
1265 	return 0;
1266 }
1267 
1268 int intel_overlay_attrs_ioctl(struct drm_device *dev, void *data,
1269 			      struct drm_file *file_priv)
1270 {
1271 	struct drm_intel_overlay_attrs *attrs = data;
1272 	struct drm_i915_private *dev_priv = to_i915(dev);
1273 	struct intel_overlay *overlay;
1274 	int ret;
1275 
1276 	overlay = dev_priv->overlay;
1277 	if (!overlay) {
1278 		drm_dbg(&dev_priv->drm, "userspace bug: no overlay\n");
1279 		return -ENODEV;
1280 	}
1281 
1282 	drm_modeset_lock_all(dev);
1283 
1284 	ret = -EINVAL;
1285 	if (!(attrs->flags & I915_OVERLAY_UPDATE_ATTRS)) {
1286 		attrs->color_key  = overlay->color_key;
1287 		attrs->brightness = overlay->brightness;
1288 		attrs->contrast   = overlay->contrast;
1289 		attrs->saturation = overlay->saturation;
1290 
1291 		if (DISPLAY_VER(dev_priv) != 2) {
1292 			attrs->gamma0 = intel_de_read(dev_priv, OGAMC0);
1293 			attrs->gamma1 = intel_de_read(dev_priv, OGAMC1);
1294 			attrs->gamma2 = intel_de_read(dev_priv, OGAMC2);
1295 			attrs->gamma3 = intel_de_read(dev_priv, OGAMC3);
1296 			attrs->gamma4 = intel_de_read(dev_priv, OGAMC4);
1297 			attrs->gamma5 = intel_de_read(dev_priv, OGAMC5);
1298 		}
1299 	} else {
1300 		if (attrs->brightness < -128 || attrs->brightness > 127)
1301 			goto out_unlock;
1302 		if (attrs->contrast > 255)
1303 			goto out_unlock;
1304 		if (attrs->saturation > 1023)
1305 			goto out_unlock;
1306 
1307 		overlay->color_key  = attrs->color_key;
1308 		overlay->brightness = attrs->brightness;
1309 		overlay->contrast   = attrs->contrast;
1310 		overlay->saturation = attrs->saturation;
1311 
1312 		update_reg_attrs(overlay, overlay->regs);
1313 
1314 		if (attrs->flags & I915_OVERLAY_UPDATE_GAMMA) {
1315 			if (DISPLAY_VER(dev_priv) == 2)
1316 				goto out_unlock;
1317 
1318 			if (overlay->active) {
1319 				ret = -EBUSY;
1320 				goto out_unlock;
1321 			}
1322 
1323 			ret = check_gamma(attrs);
1324 			if (ret)
1325 				goto out_unlock;
1326 
1327 			intel_de_write(dev_priv, OGAMC0, attrs->gamma0);
1328 			intel_de_write(dev_priv, OGAMC1, attrs->gamma1);
1329 			intel_de_write(dev_priv, OGAMC2, attrs->gamma2);
1330 			intel_de_write(dev_priv, OGAMC3, attrs->gamma3);
1331 			intel_de_write(dev_priv, OGAMC4, attrs->gamma4);
1332 			intel_de_write(dev_priv, OGAMC5, attrs->gamma5);
1333 		}
1334 	}
1335 	overlay->color_key_enabled = (attrs->flags & I915_OVERLAY_DISABLE_DEST_COLORKEY) == 0;
1336 
1337 	ret = 0;
1338 out_unlock:
1339 	drm_modeset_unlock_all(dev);
1340 
1341 	return ret;
1342 }
1343 
1344 static int get_registers(struct intel_overlay *overlay, bool use_phys)
1345 {
1346 	struct drm_i915_private *i915 = overlay->i915;
1347 	struct drm_i915_gem_object *obj;
1348 	struct i915_vma *vma;
1349 	int err;
1350 
1351 	obj = i915_gem_object_create_stolen(i915, PAGE_SIZE);
1352 	if (IS_ERR(obj))
1353 		obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
1354 	if (IS_ERR(obj))
1355 		return PTR_ERR(obj);
1356 
1357 	vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, PIN_MAPPABLE);
1358 	if (IS_ERR(vma)) {
1359 		err = PTR_ERR(vma);
1360 		goto err_put_bo;
1361 	}
1362 
1363 	if (use_phys)
1364 		overlay->flip_addr = sg_dma_address(obj->mm.pages->sgl);
1365 	else
1366 		overlay->flip_addr = i915_ggtt_offset(vma);
1367 	overlay->regs = i915_vma_pin_iomap(vma);
1368 	i915_vma_unpin(vma);
1369 
1370 	if (IS_ERR(overlay->regs)) {
1371 		err = PTR_ERR(overlay->regs);
1372 		goto err_put_bo;
1373 	}
1374 
1375 	overlay->reg_bo = obj;
1376 	return 0;
1377 
1378 err_put_bo:
1379 	i915_gem_object_put(obj);
1380 	return err;
1381 }
1382 
1383 void intel_overlay_setup(struct drm_i915_private *dev_priv)
1384 {
1385 	struct intel_overlay *overlay;
1386 	struct intel_engine_cs *engine;
1387 	int ret;
1388 
1389 	if (!HAS_OVERLAY(dev_priv))
1390 		return;
1391 
1392 	engine = to_gt(dev_priv)->engine[RCS0];
1393 	if (!engine || !engine->kernel_context)
1394 		return;
1395 
1396 	overlay = kzalloc(sizeof(*overlay), GFP_KERNEL);
1397 	if (!overlay)
1398 		return;
1399 
1400 	overlay->i915 = dev_priv;
1401 	overlay->context = engine->kernel_context;
1402 	GEM_BUG_ON(!overlay->context);
1403 
1404 	overlay->color_key = 0x0101fe;
1405 	overlay->color_key_enabled = true;
1406 	overlay->brightness = -19;
1407 	overlay->contrast = 75;
1408 	overlay->saturation = 146;
1409 
1410 	i915_active_init(&overlay->last_flip,
1411 			 NULL, intel_overlay_last_flip_retire, 0);
1412 
1413 	ret = get_registers(overlay, OVERLAY_NEEDS_PHYSICAL(dev_priv));
1414 	if (ret)
1415 		goto out_free;
1416 
1417 	memset_io(overlay->regs, 0, sizeof(struct overlay_registers));
1418 	update_polyphase_filter(overlay->regs);
1419 	update_reg_attrs(overlay, overlay->regs);
1420 
1421 	dev_priv->overlay = overlay;
1422 	drm_info(&dev_priv->drm, "Initialized overlay support.\n");
1423 	return;
1424 
1425 out_free:
1426 	kfree(overlay);
1427 }
1428 
1429 void intel_overlay_cleanup(struct drm_i915_private *dev_priv)
1430 {
1431 	struct intel_overlay *overlay;
1432 
1433 	overlay = fetch_and_zero(&dev_priv->overlay);
1434 	if (!overlay)
1435 		return;
1436 
1437 	/*
1438 	 * The bo's should be free'd by the generic code already.
1439 	 * Furthermore modesetting teardown happens beforehand so the
1440 	 * hardware should be off already.
1441 	 */
1442 	drm_WARN_ON(&dev_priv->drm, overlay->active);
1443 
1444 	i915_gem_object_put(overlay->reg_bo);
1445 	i915_active_fini(&overlay->last_flip);
1446 
1447 	kfree(overlay);
1448 }
1449 
1450 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
1451 
1452 struct intel_overlay_error_state {
1453 	struct overlay_registers regs;
1454 	unsigned long base;
1455 	u32 dovsta;
1456 	u32 isr;
1457 };
1458 
1459 struct intel_overlay_error_state *
1460 intel_overlay_capture_error_state(struct drm_i915_private *dev_priv)
1461 {
1462 	struct intel_overlay *overlay = dev_priv->overlay;
1463 	struct intel_overlay_error_state *error;
1464 
1465 	if (!overlay || !overlay->active)
1466 		return NULL;
1467 
1468 	error = kmalloc(sizeof(*error), GFP_ATOMIC);
1469 	if (error == NULL)
1470 		return NULL;
1471 
1472 	error->dovsta = intel_de_read(dev_priv, DOVSTA);
1473 	error->isr = intel_de_read(dev_priv, GEN2_ISR);
1474 	error->base = overlay->flip_addr;
1475 
1476 	memcpy_fromio(&error->regs, overlay->regs, sizeof(error->regs));
1477 
1478 	return error;
1479 }
1480 
1481 void
1482 intel_overlay_print_error_state(struct drm_i915_error_state_buf *m,
1483 				struct intel_overlay_error_state *error)
1484 {
1485 	i915_error_printf(m, "Overlay, status: 0x%08x, interrupt: 0x%08x\n",
1486 			  error->dovsta, error->isr);
1487 	i915_error_printf(m, "  Register file at 0x%08lx:\n",
1488 			  error->base);
1489 
1490 #define P(x) i915_error_printf(m, "    " #x ":	0x%08x\n", error->regs.x)
1491 	P(OBUF_0Y);
1492 	P(OBUF_1Y);
1493 	P(OBUF_0U);
1494 	P(OBUF_0V);
1495 	P(OBUF_1U);
1496 	P(OBUF_1V);
1497 	P(OSTRIDE);
1498 	P(YRGB_VPH);
1499 	P(UV_VPH);
1500 	P(HORZ_PH);
1501 	P(INIT_PHS);
1502 	P(DWINPOS);
1503 	P(DWINSZ);
1504 	P(SWIDTH);
1505 	P(SWIDTHSW);
1506 	P(SHEIGHT);
1507 	P(YRGBSCALE);
1508 	P(UVSCALE);
1509 	P(OCLRC0);
1510 	P(OCLRC1);
1511 	P(DCLRKV);
1512 	P(DCLRKM);
1513 	P(SCLRKVH);
1514 	P(SCLRKVL);
1515 	P(SCLRKEN);
1516 	P(OCONFIG);
1517 	P(OCMD);
1518 	P(OSTART_0Y);
1519 	P(OSTART_1Y);
1520 	P(OSTART_0U);
1521 	P(OSTART_0V);
1522 	P(OSTART_1U);
1523 	P(OSTART_1V);
1524 	P(OTILEOFF_0Y);
1525 	P(OTILEOFF_1Y);
1526 	P(OTILEOFF_0U);
1527 	P(OTILEOFF_0V);
1528 	P(OTILEOFF_1U);
1529 	P(OTILEOFF_1V);
1530 	P(FASTHSCALE);
1531 	P(UVSCALEV);
1532 #undef P
1533 }
1534 
1535 #endif
1536