1 // SPDX-License-Identifier: MIT
2 /*
3 * Copyright © 2020 Intel Corporation
4 */
5
6 #include "i915_reg.h"
7 #include "intel_de.h"
8 #include "intel_display_types.h"
9 #include "intel_fb.h"
10 #include "skl_scaler.h"
11 #include "skl_universal_plane.h"
12
13 /*
14 * The hardware phase 0.0 refers to the center of the pixel.
15 * We want to start from the top/left edge which is phase
16 * -0.5. That matches how the hardware calculates the scaling
17 * factors (from top-left of the first pixel to bottom-right
18 * of the last pixel, as opposed to the pixel centers).
19 *
20 * For 4:2:0 subsampled chroma planes we obviously have to
21 * adjust that so that the chroma sample position lands in
22 * the right spot.
23 *
24 * Note that for packed YCbCr 4:2:2 formats there is no way to
25 * control chroma siting. The hardware simply replicates the
26 * chroma samples for both of the luma samples, and thus we don't
27 * actually get the expected MPEG2 chroma siting convention :(
28 * The same behaviour is observed on pre-SKL platforms as well.
29 *
30 * Theory behind the formula (note that we ignore sub-pixel
31 * source coordinates):
32 * s = source sample position
33 * d = destination sample position
34 *
35 * Downscaling 4:1:
36 * -0.5
37 * | 0.0
38 * | | 1.5 (initial phase)
39 * | | |
40 * v v v
41 * | s | s | s | s |
42 * | d |
43 *
44 * Upscaling 1:4:
45 * -0.5
46 * | -0.375 (initial phase)
47 * | | 0.0
48 * | | |
49 * v v v
50 * | s |
51 * | d | d | d | d |
52 */
skl_scaler_calc_phase(int sub,int scale,bool chroma_cosited)53 static u16 skl_scaler_calc_phase(int sub, int scale, bool chroma_cosited)
54 {
55 int phase = -0x8000;
56 u16 trip = 0;
57
58 if (chroma_cosited)
59 phase += (sub - 1) * 0x8000 / sub;
60
61 phase += scale / (2 * sub);
62
63 /*
64 * Hardware initial phase limited to [-0.5:1.5].
65 * Since the max hardware scale factor is 3.0, we
66 * should never actually excdeed 1.0 here.
67 */
68 WARN_ON(phase < -0x8000 || phase > 0x18000);
69
70 if (phase < 0)
71 phase = 0x10000 + phase;
72 else
73 trip = PS_PHASE_TRIP;
74
75 return ((phase >> 2) & PS_PHASE_MASK) | trip;
76 }
77
78 #define SKL_MIN_SRC_W 8
79 #define SKL_MAX_SRC_W 4096
80 #define SKL_MIN_SRC_H 8
81 #define SKL_MAX_SRC_H 4096
82 #define SKL_MIN_DST_W 8
83 #define SKL_MAX_DST_W 4096
84 #define SKL_MIN_DST_H 8
85 #define SKL_MAX_DST_H 4096
86 #define ICL_MAX_SRC_W 5120
87 #define ICL_MAX_SRC_H 4096
88 #define ICL_MAX_DST_W 5120
89 #define ICL_MAX_DST_H 4096
90 #define TGL_MAX_SRC_W 5120
91 #define TGL_MAX_SRC_H 8192
92 #define TGL_MAX_DST_W 8192
93 #define TGL_MAX_DST_H 8192
94 #define MTL_MAX_SRC_W 4096
95 #define MTL_MAX_SRC_H 8192
96 #define MTL_MAX_DST_W 8192
97 #define MTL_MAX_DST_H 8192
98 #define SKL_MIN_YUV_420_SRC_W 16
99 #define SKL_MIN_YUV_420_SRC_H 16
100
101 static int
skl_update_scaler(struct intel_crtc_state * crtc_state,bool force_detach,unsigned int scaler_user,int * scaler_id,int src_w,int src_h,int dst_w,int dst_h,const struct drm_format_info * format,u64 modifier,bool need_scaler)102 skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
103 unsigned int scaler_user, int *scaler_id,
104 int src_w, int src_h, int dst_w, int dst_h,
105 const struct drm_format_info *format,
106 u64 modifier, bool need_scaler)
107 {
108 struct intel_crtc_scaler_state *scaler_state =
109 &crtc_state->scaler_state;
110 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
111 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
112 const struct drm_display_mode *adjusted_mode =
113 &crtc_state->hw.adjusted_mode;
114 int pipe_src_w = drm_rect_width(&crtc_state->pipe_src);
115 int pipe_src_h = drm_rect_height(&crtc_state->pipe_src);
116 int min_src_w, min_src_h, min_dst_w, min_dst_h;
117 int max_src_w, max_src_h, max_dst_w, max_dst_h;
118
119 /*
120 * Src coordinates are already rotated by 270 degrees for
121 * the 90/270 degree plane rotation cases (to match the
122 * GTT mapping), hence no need to account for rotation here.
123 */
124 if (src_w != dst_w || src_h != dst_h)
125 need_scaler = true;
126
127 /*
128 * Scaling/fitting not supported in IF-ID mode in GEN9+
129 * TODO: Interlace fetch mode doesn't support YUV420 planar formats.
130 * Once NV12 is enabled, handle it here while allocating scaler
131 * for NV12.
132 */
133 if (DISPLAY_VER(dev_priv) >= 9 && crtc_state->hw.enable &&
134 need_scaler && adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
135 drm_dbg_kms(&dev_priv->drm,
136 "Pipe/Plane scaling not supported with IF-ID mode\n");
137 return -EINVAL;
138 }
139
140 /*
141 * if plane is being disabled or scaler is no more required or force detach
142 * - free scaler binded to this plane/crtc
143 * - in order to do this, update crtc->scaler_usage
144 *
145 * Here scaler state in crtc_state is set free so that
146 * scaler can be assigned to other user. Actual register
147 * update to free the scaler is done in plane/panel-fit programming.
148 * For this purpose crtc/plane_state->scaler_id isn't reset here.
149 */
150 if (force_detach || !need_scaler) {
151 if (*scaler_id >= 0) {
152 scaler_state->scaler_users &= ~(1 << scaler_user);
153 scaler_state->scalers[*scaler_id].in_use = 0;
154
155 drm_dbg_kms(&dev_priv->drm,
156 "scaler_user index %u.%u: "
157 "Staged freeing scaler id %d scaler_users = 0x%x\n",
158 crtc->pipe, scaler_user, *scaler_id,
159 scaler_state->scaler_users);
160 *scaler_id = -1;
161 }
162 return 0;
163 }
164
165 if (format && intel_format_info_is_yuv_semiplanar(format, modifier) &&
166 (src_h < SKL_MIN_YUV_420_SRC_H || src_w < SKL_MIN_YUV_420_SRC_W)) {
167 drm_dbg_kms(&dev_priv->drm,
168 "Planar YUV: src dimensions not met\n");
169 return -EINVAL;
170 }
171
172 min_src_w = SKL_MIN_SRC_W;
173 min_src_h = SKL_MIN_SRC_H;
174 min_dst_w = SKL_MIN_DST_W;
175 min_dst_h = SKL_MIN_DST_H;
176
177 if (DISPLAY_VER(dev_priv) < 11) {
178 max_src_w = SKL_MAX_SRC_W;
179 max_src_h = SKL_MAX_SRC_H;
180 max_dst_w = SKL_MAX_DST_W;
181 max_dst_h = SKL_MAX_DST_H;
182 } else if (DISPLAY_VER(dev_priv) < 12) {
183 max_src_w = ICL_MAX_SRC_W;
184 max_src_h = ICL_MAX_SRC_H;
185 max_dst_w = ICL_MAX_DST_W;
186 max_dst_h = ICL_MAX_DST_H;
187 } else if (DISPLAY_VER(dev_priv) < 14) {
188 max_src_w = TGL_MAX_SRC_W;
189 max_src_h = TGL_MAX_SRC_H;
190 max_dst_w = TGL_MAX_DST_W;
191 max_dst_h = TGL_MAX_DST_H;
192 } else {
193 max_src_w = MTL_MAX_SRC_W;
194 max_src_h = MTL_MAX_SRC_H;
195 max_dst_w = MTL_MAX_DST_W;
196 max_dst_h = MTL_MAX_DST_H;
197 }
198
199 /* range checks */
200 if (src_w < min_src_w || src_h < min_src_h ||
201 dst_w < min_dst_w || dst_h < min_dst_h ||
202 src_w > max_src_w || src_h > max_src_h ||
203 dst_w > max_dst_w || dst_h > max_dst_h) {
204 drm_dbg_kms(&dev_priv->drm,
205 "scaler_user index %u.%u: src %ux%u dst %ux%u "
206 "size is out of scaler range\n",
207 crtc->pipe, scaler_user, src_w, src_h,
208 dst_w, dst_h);
209 return -EINVAL;
210 }
211
212 /*
213 * The pipe scaler does not use all the bits of PIPESRC, at least
214 * on the earlier platforms. So even when we're scaling a plane
215 * the *pipe* source size must not be too large. For simplicity
216 * we assume the limits match the scaler source size limits. Might
217 * not be 100% accurate on all platforms, but good enough for now.
218 */
219 if (pipe_src_w > max_src_w || pipe_src_h > max_src_h) {
220 drm_dbg_kms(&dev_priv->drm,
221 "scaler_user index %u.%u: pipe src size %ux%u "
222 "is out of scaler range\n",
223 crtc->pipe, scaler_user, pipe_src_w, pipe_src_h);
224 return -EINVAL;
225 }
226
227 /* mark this plane as a scaler user in crtc_state */
228 scaler_state->scaler_users |= (1 << scaler_user);
229 drm_dbg_kms(&dev_priv->drm, "scaler_user index %u.%u: "
230 "staged scaling request for %ux%u->%ux%u scaler_users = 0x%x\n",
231 crtc->pipe, scaler_user, src_w, src_h, dst_w, dst_h,
232 scaler_state->scaler_users);
233
234 return 0;
235 }
236
skl_update_scaler_crtc(struct intel_crtc_state * crtc_state)237 int skl_update_scaler_crtc(struct intel_crtc_state *crtc_state)
238 {
239 const struct drm_display_mode *pipe_mode = &crtc_state->hw.pipe_mode;
240 int width, height;
241
242 if (crtc_state->pch_pfit.enabled) {
243 width = drm_rect_width(&crtc_state->pch_pfit.dst);
244 height = drm_rect_height(&crtc_state->pch_pfit.dst);
245 } else {
246 width = pipe_mode->crtc_hdisplay;
247 height = pipe_mode->crtc_vdisplay;
248 }
249 return skl_update_scaler(crtc_state, !crtc_state->hw.active,
250 SKL_CRTC_INDEX,
251 &crtc_state->scaler_state.scaler_id,
252 drm_rect_width(&crtc_state->pipe_src),
253 drm_rect_height(&crtc_state->pipe_src),
254 width, height, NULL, 0,
255 crtc_state->pch_pfit.enabled);
256 }
257
258 /**
259 * skl_update_scaler_plane - Stages update to scaler state for a given plane.
260 * @crtc_state: crtc's scaler state
261 * @plane_state: atomic plane state to update
262 *
263 * Return
264 * 0 - scaler_usage updated successfully
265 * error - requested scaling cannot be supported or other error condition
266 */
skl_update_scaler_plane(struct intel_crtc_state * crtc_state,struct intel_plane_state * plane_state)267 int skl_update_scaler_plane(struct intel_crtc_state *crtc_state,
268 struct intel_plane_state *plane_state)
269 {
270 struct intel_plane *intel_plane =
271 to_intel_plane(plane_state->uapi.plane);
272 struct drm_i915_private *dev_priv = to_i915(intel_plane->base.dev);
273 struct drm_framebuffer *fb = plane_state->hw.fb;
274 int ret;
275 bool force_detach = !fb || !plane_state->uapi.visible;
276 bool need_scaler = false;
277
278 /* Pre-gen11 and SDR planes always need a scaler for planar formats. */
279 if (!icl_is_hdr_plane(dev_priv, intel_plane->id) &&
280 fb && intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier))
281 need_scaler = true;
282
283 ret = skl_update_scaler(crtc_state, force_detach,
284 drm_plane_index(&intel_plane->base),
285 &plane_state->scaler_id,
286 drm_rect_width(&plane_state->uapi.src) >> 16,
287 drm_rect_height(&plane_state->uapi.src) >> 16,
288 drm_rect_width(&plane_state->uapi.dst),
289 drm_rect_height(&plane_state->uapi.dst),
290 fb ? fb->format : NULL,
291 fb ? fb->modifier : 0,
292 need_scaler);
293
294 if (ret || plane_state->scaler_id < 0)
295 return ret;
296
297 /* check colorkey */
298 if (plane_state->ckey.flags) {
299 drm_dbg_kms(&dev_priv->drm,
300 "[PLANE:%d:%s] scaling with color key not allowed",
301 intel_plane->base.base.id,
302 intel_plane->base.name);
303 return -EINVAL;
304 }
305
306 /* Check src format */
307 switch (fb->format->format) {
308 case DRM_FORMAT_RGB565:
309 case DRM_FORMAT_XBGR8888:
310 case DRM_FORMAT_XRGB8888:
311 case DRM_FORMAT_ABGR8888:
312 case DRM_FORMAT_ARGB8888:
313 case DRM_FORMAT_XRGB2101010:
314 case DRM_FORMAT_XBGR2101010:
315 case DRM_FORMAT_ARGB2101010:
316 case DRM_FORMAT_ABGR2101010:
317 case DRM_FORMAT_YUYV:
318 case DRM_FORMAT_YVYU:
319 case DRM_FORMAT_UYVY:
320 case DRM_FORMAT_VYUY:
321 case DRM_FORMAT_NV12:
322 case DRM_FORMAT_XYUV8888:
323 case DRM_FORMAT_P010:
324 case DRM_FORMAT_P012:
325 case DRM_FORMAT_P016:
326 case DRM_FORMAT_Y210:
327 case DRM_FORMAT_Y212:
328 case DRM_FORMAT_Y216:
329 case DRM_FORMAT_XVYU2101010:
330 case DRM_FORMAT_XVYU12_16161616:
331 case DRM_FORMAT_XVYU16161616:
332 break;
333 case DRM_FORMAT_XBGR16161616F:
334 case DRM_FORMAT_ABGR16161616F:
335 case DRM_FORMAT_XRGB16161616F:
336 case DRM_FORMAT_ARGB16161616F:
337 if (DISPLAY_VER(dev_priv) >= 11)
338 break;
339 fallthrough;
340 default:
341 drm_dbg_kms(&dev_priv->drm,
342 "[PLANE:%d:%s] FB:%d unsupported scaling format 0x%x\n",
343 intel_plane->base.base.id, intel_plane->base.name,
344 fb->base.id, fb->format->format);
345 return -EINVAL;
346 }
347
348 return 0;
349 }
350
intel_atomic_setup_scaler(struct intel_crtc_scaler_state * scaler_state,int num_scalers_need,struct intel_crtc * intel_crtc,const char * name,int idx,struct intel_plane_state * plane_state,int * scaler_id)351 static int intel_atomic_setup_scaler(struct intel_crtc_scaler_state *scaler_state,
352 int num_scalers_need, struct intel_crtc *intel_crtc,
353 const char *name, int idx,
354 struct intel_plane_state *plane_state,
355 int *scaler_id)
356 {
357 struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
358 int j;
359 u32 mode;
360
361 if (*scaler_id < 0) {
362 /* find a free scaler */
363 for (j = 0; j < intel_crtc->num_scalers; j++) {
364 if (scaler_state->scalers[j].in_use)
365 continue;
366
367 *scaler_id = j;
368 scaler_state->scalers[*scaler_id].in_use = 1;
369 break;
370 }
371 }
372
373 if (drm_WARN(&dev_priv->drm, *scaler_id < 0,
374 "Cannot find scaler for %s:%d\n", name, idx))
375 return -EINVAL;
376
377 /* set scaler mode */
378 if (plane_state && plane_state->hw.fb &&
379 plane_state->hw.fb->format->is_yuv &&
380 plane_state->hw.fb->format->num_planes > 1) {
381 struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
382
383 if (DISPLAY_VER(dev_priv) == 9) {
384 mode = SKL_PS_SCALER_MODE_NV12;
385 } else if (icl_is_hdr_plane(dev_priv, plane->id)) {
386 /*
387 * On gen11+'s HDR planes we only use the scaler for
388 * scaling. They have a dedicated chroma upsampler, so
389 * we don't need the scaler to upsample the UV plane.
390 */
391 mode = PS_SCALER_MODE_NORMAL;
392 } else {
393 struct intel_plane *linked =
394 plane_state->planar_linked_plane;
395
396 mode = PS_SCALER_MODE_PLANAR;
397
398 if (linked)
399 mode |= PS_BINDING_Y_PLANE(linked->id);
400 }
401 } else if (DISPLAY_VER(dev_priv) >= 10) {
402 mode = PS_SCALER_MODE_NORMAL;
403 } else if (num_scalers_need == 1 && intel_crtc->num_scalers > 1) {
404 /*
405 * when only 1 scaler is in use on a pipe with 2 scalers
406 * scaler 0 operates in high quality (HQ) mode.
407 * In this case use scaler 0 to take advantage of HQ mode
408 */
409 scaler_state->scalers[*scaler_id].in_use = 0;
410 *scaler_id = 0;
411 scaler_state->scalers[0].in_use = 1;
412 mode = SKL_PS_SCALER_MODE_HQ;
413 } else {
414 mode = SKL_PS_SCALER_MODE_DYN;
415 }
416
417 /*
418 * FIXME: we should also check the scaler factors for pfit, so
419 * this shouldn't be tied directly to planes.
420 */
421 if (plane_state && plane_state->hw.fb) {
422 const struct drm_framebuffer *fb = plane_state->hw.fb;
423 const struct drm_rect *src = &plane_state->uapi.src;
424 const struct drm_rect *dst = &plane_state->uapi.dst;
425 int hscale, vscale, max_vscale, max_hscale;
426
427 /*
428 * FIXME: When two scalers are needed, but only one of
429 * them needs to downscale, we should make sure that
430 * the one that needs downscaling support is assigned
431 * as the first scaler, so we don't reject downscaling
432 * unnecessarily.
433 */
434
435 if (DISPLAY_VER(dev_priv) >= 14) {
436 /*
437 * On versions 14 and up, only the first
438 * scaler supports a vertical scaling factor
439 * of more than 1.0, while a horizontal
440 * scaling factor of 3.0 is supported.
441 */
442 max_hscale = 0x30000 - 1;
443 if (*scaler_id == 0)
444 max_vscale = 0x30000 - 1;
445 else
446 max_vscale = 0x10000;
447
448 } else if (DISPLAY_VER(dev_priv) >= 10 ||
449 !intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier)) {
450 max_hscale = 0x30000 - 1;
451 max_vscale = 0x30000 - 1;
452 } else {
453 max_hscale = 0x20000 - 1;
454 max_vscale = 0x20000 - 1;
455 }
456
457 /*
458 * FIXME: We should change the if-else block above to
459 * support HQ vs dynamic scaler properly.
460 */
461
462 /* Check if required scaling is within limits */
463 hscale = drm_rect_calc_hscale(src, dst, 1, max_hscale);
464 vscale = drm_rect_calc_vscale(src, dst, 1, max_vscale);
465
466 if (hscale < 0 || vscale < 0) {
467 drm_dbg_kms(&dev_priv->drm,
468 "Scaler %d doesn't support required plane scaling\n",
469 *scaler_id);
470 drm_rect_debug_print("src: ", src, true);
471 drm_rect_debug_print("dst: ", dst, false);
472
473 return -EINVAL;
474 }
475 }
476
477 drm_dbg_kms(&dev_priv->drm, "Attached scaler id %u.%u to %s:%d\n",
478 intel_crtc->pipe, *scaler_id, name, idx);
479 scaler_state->scalers[*scaler_id].mode = mode;
480
481 return 0;
482 }
483
484 /**
485 * intel_atomic_setup_scalers() - setup scalers for crtc per staged requests
486 * @dev_priv: i915 device
487 * @intel_crtc: intel crtc
488 * @crtc_state: incoming crtc_state to validate and setup scalers
489 *
490 * This function sets up scalers based on staged scaling requests for
491 * a @crtc and its planes. It is called from crtc level check path. If request
492 * is a supportable request, it attaches scalers to requested planes and crtc.
493 *
494 * This function takes into account the current scaler(s) in use by any planes
495 * not being part of this atomic state
496 *
497 * Returns:
498 * 0 - scalers were setup successfully
499 * error code - otherwise
500 */
intel_atomic_setup_scalers(struct drm_i915_private * dev_priv,struct intel_crtc * intel_crtc,struct intel_crtc_state * crtc_state)501 int intel_atomic_setup_scalers(struct drm_i915_private *dev_priv,
502 struct intel_crtc *intel_crtc,
503 struct intel_crtc_state *crtc_state)
504 {
505 struct drm_plane *plane = NULL;
506 struct intel_plane *intel_plane;
507 struct intel_crtc_scaler_state *scaler_state =
508 &crtc_state->scaler_state;
509 struct drm_atomic_state *drm_state = crtc_state->uapi.state;
510 struct intel_atomic_state *intel_state = to_intel_atomic_state(drm_state);
511 int num_scalers_need;
512 int i;
513
514 num_scalers_need = hweight32(scaler_state->scaler_users);
515
516 /*
517 * High level flow:
518 * - staged scaler requests are already in scaler_state->scaler_users
519 * - check whether staged scaling requests can be supported
520 * - add planes using scalers that aren't in current transaction
521 * - assign scalers to requested users
522 * - as part of plane commit, scalers will be committed
523 * (i.e., either attached or detached) to respective planes in hw
524 * - as part of crtc_commit, scaler will be either attached or detached
525 * to crtc in hw
526 */
527
528 /* fail if required scalers > available scalers */
529 if (num_scalers_need > intel_crtc->num_scalers) {
530 drm_dbg_kms(&dev_priv->drm,
531 "Too many scaling requests %d > %d\n",
532 num_scalers_need, intel_crtc->num_scalers);
533 return -EINVAL;
534 }
535
536 /* walkthrough scaler_users bits and start assigning scalers */
537 for (i = 0; i < sizeof(scaler_state->scaler_users) * 8; i++) {
538 struct intel_plane_state *plane_state = NULL;
539 int *scaler_id;
540 const char *name;
541 int idx, ret;
542
543 /* skip if scaler not required */
544 if (!(scaler_state->scaler_users & (1 << i)))
545 continue;
546
547 if (i == SKL_CRTC_INDEX) {
548 name = "CRTC";
549 idx = intel_crtc->base.base.id;
550
551 /* panel fitter case: assign as a crtc scaler */
552 scaler_id = &scaler_state->scaler_id;
553 } else {
554 name = "PLANE";
555
556 /* plane scaler case: assign as a plane scaler */
557 /* find the plane that set the bit as scaler_user */
558 plane = drm_state->planes[i].ptr;
559
560 /*
561 * to enable/disable hq mode, add planes that are using scaler
562 * into this transaction
563 */
564 if (!plane) {
565 struct drm_plane_state *state;
566
567 /*
568 * GLK+ scalers don't have a HQ mode so it
569 * isn't necessary to change between HQ and dyn mode
570 * on those platforms.
571 */
572 if (DISPLAY_VER(dev_priv) >= 10)
573 continue;
574
575 plane = drm_plane_from_index(&dev_priv->drm, i);
576 state = drm_atomic_get_plane_state(drm_state, plane);
577 if (IS_ERR(state)) {
578 drm_dbg_kms(&dev_priv->drm,
579 "Failed to add [PLANE:%d] to drm_state\n",
580 plane->base.id);
581 return PTR_ERR(state);
582 }
583 }
584
585 intel_plane = to_intel_plane(plane);
586 idx = plane->base.id;
587
588 /* plane on different crtc cannot be a scaler user of this crtc */
589 if (drm_WARN_ON(&dev_priv->drm,
590 intel_plane->pipe != intel_crtc->pipe))
591 continue;
592
593 plane_state = intel_atomic_get_new_plane_state(intel_state,
594 intel_plane);
595 scaler_id = &plane_state->scaler_id;
596 }
597
598 ret = intel_atomic_setup_scaler(scaler_state, num_scalers_need,
599 intel_crtc, name, idx,
600 plane_state, scaler_id);
601 if (ret < 0)
602 return ret;
603 }
604
605 return 0;
606 }
607
glk_coef_tap(int i)608 static int glk_coef_tap(int i)
609 {
610 return i % 7;
611 }
612
glk_nearest_filter_coef(int t)613 static u16 glk_nearest_filter_coef(int t)
614 {
615 return t == 3 ? 0x0800 : 0x3000;
616 }
617
618 /*
619 * Theory behind setting nearest-neighbor integer scaling:
620 *
621 * 17 phase of 7 taps requires 119 coefficients in 60 dwords per set.
622 * The letter represents the filter tap (D is the center tap) and the number
623 * represents the coefficient set for a phase (0-16).
624 *
625 * +------------+------------------------+------------------------+
626 * |Index value | Data value coeffient 1 | Data value coeffient 2 |
627 * +------------+------------------------+------------------------+
628 * | 00h | B0 | A0 |
629 * +------------+------------------------+------------------------+
630 * | 01h | D0 | C0 |
631 * +------------+------------------------+------------------------+
632 * | 02h | F0 | E0 |
633 * +------------+------------------------+------------------------+
634 * | 03h | A1 | G0 |
635 * +------------+------------------------+------------------------+
636 * | 04h | C1 | B1 |
637 * +------------+------------------------+------------------------+
638 * | ... | ... | ... |
639 * +------------+------------------------+------------------------+
640 * | 38h | B16 | A16 |
641 * +------------+------------------------+------------------------+
642 * | 39h | D16 | C16 |
643 * +------------+------------------------+------------------------+
644 * | 3Ah | F16 | C16 |
645 * +------------+------------------------+------------------------+
646 * | 3Bh | Reserved | G16 |
647 * +------------+------------------------+------------------------+
648 *
649 * To enable nearest-neighbor scaling: program scaler coefficents with
650 * the center tap (Dxx) values set to 1 and all other values set to 0 as per
651 * SCALER_COEFFICIENT_FORMAT
652 *
653 */
654
glk_program_nearest_filter_coefs(struct drm_i915_private * dev_priv,enum pipe pipe,int id,int set)655 static void glk_program_nearest_filter_coefs(struct drm_i915_private *dev_priv,
656 enum pipe pipe, int id, int set)
657 {
658 int i;
659
660 intel_de_write_fw(dev_priv, GLK_PS_COEF_INDEX_SET(pipe, id, set),
661 PS_COEF_INDEX_AUTO_INC);
662
663 for (i = 0; i < 17 * 7; i += 2) {
664 u32 tmp;
665 int t;
666
667 t = glk_coef_tap(i);
668 tmp = glk_nearest_filter_coef(t);
669
670 t = glk_coef_tap(i + 1);
671 tmp |= glk_nearest_filter_coef(t) << 16;
672
673 intel_de_write_fw(dev_priv, GLK_PS_COEF_DATA_SET(pipe, id, set),
674 tmp);
675 }
676
677 intel_de_write_fw(dev_priv, GLK_PS_COEF_INDEX_SET(pipe, id, set), 0);
678 }
679
skl_scaler_get_filter_select(enum drm_scaling_filter filter,int set)680 static u32 skl_scaler_get_filter_select(enum drm_scaling_filter filter, int set)
681 {
682 if (filter == DRM_SCALING_FILTER_NEAREST_NEIGHBOR) {
683 return (PS_FILTER_PROGRAMMED |
684 PS_Y_VERT_FILTER_SELECT(set) |
685 PS_Y_HORZ_FILTER_SELECT(set) |
686 PS_UV_VERT_FILTER_SELECT(set) |
687 PS_UV_HORZ_FILTER_SELECT(set));
688 }
689
690 return PS_FILTER_MEDIUM;
691 }
692
skl_scaler_setup_filter(struct drm_i915_private * dev_priv,enum pipe pipe,int id,int set,enum drm_scaling_filter filter)693 static void skl_scaler_setup_filter(struct drm_i915_private *dev_priv, enum pipe pipe,
694 int id, int set, enum drm_scaling_filter filter)
695 {
696 switch (filter) {
697 case DRM_SCALING_FILTER_DEFAULT:
698 break;
699 case DRM_SCALING_FILTER_NEAREST_NEIGHBOR:
700 glk_program_nearest_filter_coefs(dev_priv, pipe, id, set);
701 break;
702 default:
703 MISSING_CASE(filter);
704 }
705 }
706
skl_pfit_enable(const struct intel_crtc_state * crtc_state)707 void skl_pfit_enable(const struct intel_crtc_state *crtc_state)
708 {
709 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
710 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
711 const struct intel_crtc_scaler_state *scaler_state =
712 &crtc_state->scaler_state;
713 const struct drm_rect *dst = &crtc_state->pch_pfit.dst;
714 u16 uv_rgb_hphase, uv_rgb_vphase;
715 enum pipe pipe = crtc->pipe;
716 int width = drm_rect_width(dst);
717 int height = drm_rect_height(dst);
718 int x = dst->x1;
719 int y = dst->y1;
720 int hscale, vscale;
721 struct drm_rect src;
722 int id;
723 u32 ps_ctrl;
724
725 if (!crtc_state->pch_pfit.enabled)
726 return;
727
728 if (drm_WARN_ON(&dev_priv->drm,
729 crtc_state->scaler_state.scaler_id < 0))
730 return;
731
732 drm_rect_init(&src, 0, 0,
733 drm_rect_width(&crtc_state->pipe_src) << 16,
734 drm_rect_height(&crtc_state->pipe_src) << 16);
735
736 hscale = drm_rect_calc_hscale(&src, dst, 0, INT_MAX);
737 vscale = drm_rect_calc_vscale(&src, dst, 0, INT_MAX);
738
739 uv_rgb_hphase = skl_scaler_calc_phase(1, hscale, false);
740 uv_rgb_vphase = skl_scaler_calc_phase(1, vscale, false);
741
742 id = scaler_state->scaler_id;
743
744 ps_ctrl = PS_SCALER_EN | PS_BINDING_PIPE | scaler_state->scalers[id].mode |
745 skl_scaler_get_filter_select(crtc_state->hw.scaling_filter, 0);
746
747 skl_scaler_setup_filter(dev_priv, pipe, id, 0,
748 crtc_state->hw.scaling_filter);
749
750 intel_de_write_fw(dev_priv, SKL_PS_CTRL(pipe, id), ps_ctrl);
751
752 intel_de_write_fw(dev_priv, SKL_PS_VPHASE(pipe, id),
753 PS_Y_PHASE(0) | PS_UV_RGB_PHASE(uv_rgb_vphase));
754 intel_de_write_fw(dev_priv, SKL_PS_HPHASE(pipe, id),
755 PS_Y_PHASE(0) | PS_UV_RGB_PHASE(uv_rgb_hphase));
756 intel_de_write_fw(dev_priv, SKL_PS_WIN_POS(pipe, id),
757 PS_WIN_XPOS(x) | PS_WIN_YPOS(y));
758 intel_de_write_fw(dev_priv, SKL_PS_WIN_SZ(pipe, id),
759 PS_WIN_XSIZE(width) | PS_WIN_YSIZE(height));
760 }
761
762 void
skl_program_plane_scaler(struct intel_plane * plane,const struct intel_crtc_state * crtc_state,const struct intel_plane_state * plane_state)763 skl_program_plane_scaler(struct intel_plane *plane,
764 const struct intel_crtc_state *crtc_state,
765 const struct intel_plane_state *plane_state)
766 {
767 struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
768 const struct drm_framebuffer *fb = plane_state->hw.fb;
769 enum pipe pipe = plane->pipe;
770 int scaler_id = plane_state->scaler_id;
771 const struct intel_scaler *scaler =
772 &crtc_state->scaler_state.scalers[scaler_id];
773 int crtc_x = plane_state->uapi.dst.x1;
774 int crtc_y = plane_state->uapi.dst.y1;
775 u32 crtc_w = drm_rect_width(&plane_state->uapi.dst);
776 u32 crtc_h = drm_rect_height(&plane_state->uapi.dst);
777 u16 y_hphase, uv_rgb_hphase;
778 u16 y_vphase, uv_rgb_vphase;
779 int hscale, vscale;
780 u32 ps_ctrl;
781
782 hscale = drm_rect_calc_hscale(&plane_state->uapi.src,
783 &plane_state->uapi.dst,
784 0, INT_MAX);
785 vscale = drm_rect_calc_vscale(&plane_state->uapi.src,
786 &plane_state->uapi.dst,
787 0, INT_MAX);
788
789 /* TODO: handle sub-pixel coordinates */
790 if (intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier) &&
791 !icl_is_hdr_plane(dev_priv, plane->id)) {
792 y_hphase = skl_scaler_calc_phase(1, hscale, false);
793 y_vphase = skl_scaler_calc_phase(1, vscale, false);
794
795 /* MPEG2 chroma siting convention */
796 uv_rgb_hphase = skl_scaler_calc_phase(2, hscale, true);
797 uv_rgb_vphase = skl_scaler_calc_phase(2, vscale, false);
798 } else {
799 /* not used */
800 y_hphase = 0;
801 y_vphase = 0;
802
803 uv_rgb_hphase = skl_scaler_calc_phase(1, hscale, false);
804 uv_rgb_vphase = skl_scaler_calc_phase(1, vscale, false);
805 }
806
807 ps_ctrl = PS_SCALER_EN | PS_BINDING_PLANE(plane->id) | scaler->mode |
808 skl_scaler_get_filter_select(plane_state->hw.scaling_filter, 0);
809
810 skl_scaler_setup_filter(dev_priv, pipe, scaler_id, 0,
811 plane_state->hw.scaling_filter);
812
813 intel_de_write_fw(dev_priv, SKL_PS_CTRL(pipe, scaler_id), ps_ctrl);
814 intel_de_write_fw(dev_priv, SKL_PS_VPHASE(pipe, scaler_id),
815 PS_Y_PHASE(y_vphase) | PS_UV_RGB_PHASE(uv_rgb_vphase));
816 intel_de_write_fw(dev_priv, SKL_PS_HPHASE(pipe, scaler_id),
817 PS_Y_PHASE(y_hphase) | PS_UV_RGB_PHASE(uv_rgb_hphase));
818 intel_de_write_fw(dev_priv, SKL_PS_WIN_POS(pipe, scaler_id),
819 PS_WIN_XPOS(crtc_x) | PS_WIN_YPOS(crtc_y));
820 intel_de_write_fw(dev_priv, SKL_PS_WIN_SZ(pipe, scaler_id),
821 PS_WIN_XSIZE(crtc_w) | PS_WIN_YSIZE(crtc_h));
822 }
823
skl_detach_scaler(struct intel_crtc * crtc,int id)824 static void skl_detach_scaler(struct intel_crtc *crtc, int id)
825 {
826 struct drm_device *dev = crtc->base.dev;
827 struct drm_i915_private *dev_priv = to_i915(dev);
828
829 intel_de_write_fw(dev_priv, SKL_PS_CTRL(crtc->pipe, id), 0);
830 intel_de_write_fw(dev_priv, SKL_PS_WIN_POS(crtc->pipe, id), 0);
831 intel_de_write_fw(dev_priv, SKL_PS_WIN_SZ(crtc->pipe, id), 0);
832 }
833
834 /*
835 * This function detaches (aka. unbinds) unused scalers in hardware
836 */
skl_detach_scalers(const struct intel_crtc_state * crtc_state)837 void skl_detach_scalers(const struct intel_crtc_state *crtc_state)
838 {
839 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
840 const struct intel_crtc_scaler_state *scaler_state =
841 &crtc_state->scaler_state;
842 int i;
843
844 /* loop through and disable scalers that aren't in use */
845 for (i = 0; i < crtc->num_scalers; i++) {
846 if (!scaler_state->scalers[i].in_use)
847 skl_detach_scaler(crtc, i);
848 }
849 }
850
skl_scaler_disable(const struct intel_crtc_state * old_crtc_state)851 void skl_scaler_disable(const struct intel_crtc_state *old_crtc_state)
852 {
853 struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
854 int i;
855
856 for (i = 0; i < crtc->num_scalers; i++)
857 skl_detach_scaler(crtc, i);
858 }
859
skl_scaler_get_config(struct intel_crtc_state * crtc_state)860 void skl_scaler_get_config(struct intel_crtc_state *crtc_state)
861 {
862 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
863 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
864 struct intel_crtc_scaler_state *scaler_state = &crtc_state->scaler_state;
865 int id = -1;
866 int i;
867
868 /* find scaler attached to this pipe */
869 for (i = 0; i < crtc->num_scalers; i++) {
870 u32 ctl, pos, size;
871
872 ctl = intel_de_read(dev_priv, SKL_PS_CTRL(crtc->pipe, i));
873 if ((ctl & (PS_SCALER_EN | PS_BINDING_MASK)) != (PS_SCALER_EN | PS_BINDING_PIPE))
874 continue;
875
876 id = i;
877 crtc_state->pch_pfit.enabled = true;
878
879 pos = intel_de_read(dev_priv, SKL_PS_WIN_POS(crtc->pipe, i));
880 size = intel_de_read(dev_priv, SKL_PS_WIN_SZ(crtc->pipe, i));
881
882 drm_rect_init(&crtc_state->pch_pfit.dst,
883 REG_FIELD_GET(PS_WIN_XPOS_MASK, pos),
884 REG_FIELD_GET(PS_WIN_YPOS_MASK, pos),
885 REG_FIELD_GET(PS_WIN_XSIZE_MASK, size),
886 REG_FIELD_GET(PS_WIN_YSIZE_MASK, size));
887
888 scaler_state->scalers[i].in_use = true;
889 break;
890 }
891
892 scaler_state->scaler_id = id;
893 if (id >= 0)
894 scaler_state->scaler_users |= (1 << SKL_CRTC_INDEX);
895 else
896 scaler_state->scaler_users &= ~(1 << SKL_CRTC_INDEX);
897 }
898