File: | dev/pci/drm/amd/display/modules/color/color_gamma.c |
Warning: | line 869, column 20 Value stored to 'a' during its initialization is never read |
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1 | /* |
2 | * Copyright 2016 Advanced Micro Devices, Inc. |
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 shall be included in |
12 | * all copies or substantial portions of the Software. |
13 | * |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
20 | * OTHER DEALINGS IN THE SOFTWARE. |
21 | * |
22 | * Authors: AMD |
23 | * |
24 | */ |
25 | |
26 | #include <linux/mm.h> |
27 | #include <linux/slab.h> |
28 | |
29 | #include "dc.h" |
30 | #include "opp.h" |
31 | #include "color_gamma.h" |
32 | |
33 | static struct hw_x_point coordinates_x[MAX_HW_POINTS(16*32) + 2]; |
34 | |
35 | // these are helpers for calculations to reduce stack usage |
36 | // do not depend on these being preserved across calls |
37 | |
38 | /* Helper to optimize gamma calculation, only use in translate_from_linear, in |
39 | * particular the dc_fixpt_pow function which is very expensive |
40 | * The idea is that our regions for X points are exponential and currently they all use |
41 | * the same number of points (NUM_PTS_IN_REGION) and in each region every point |
42 | * is exactly 2x the one at the same index in the previous region. In other words |
43 | * X[i] = 2 * X[i-NUM_PTS_IN_REGION] for i>=16 |
44 | * The other fact is that (2x)^gamma = 2^gamma * x^gamma |
45 | * So we compute and save x^gamma for the first 16 regions, and for every next region |
46 | * just multiply with 2^gamma which can be computed once, and save the result so we |
47 | * recursively compute all the values. |
48 | */ |
49 | /*sRGB 709 2.2 2.4 P3*/ |
50 | static const int32_t gamma_numerator01[] = { 31308, 180000, 0, 0, 0}; |
51 | static const int32_t gamma_numerator02[] = { 12920, 4500, 0, 0, 0}; |
52 | static const int32_t gamma_numerator03[] = { 55, 99, 0, 0, 0}; |
53 | static const int32_t gamma_numerator04[] = { 55, 99, 0, 0, 0}; |
54 | static const int32_t gamma_numerator05[] = { 2400, 2200, 2200, 2400, 2600}; |
55 | |
56 | /* one-time setup of X points */ |
57 | void setup_x_points_distribution(void) |
58 | { |
59 | struct fixed31_32 region_size = dc_fixpt_from_int(128); |
60 | int32_t segment; |
61 | uint32_t seg_offset; |
62 | uint32_t index; |
63 | struct fixed31_32 increment; |
64 | |
65 | coordinates_x[MAX_HW_POINTS(16*32)].x = region_size; |
66 | coordinates_x[MAX_HW_POINTS(16*32) + 1].x = region_size; |
67 | |
68 | for (segment = 6; segment > (6 - NUM_REGIONS32); segment--) { |
69 | region_size = dc_fixpt_div_int(region_size, 2); |
70 | increment = dc_fixpt_div_int(region_size, |
71 | NUM_PTS_IN_REGION16); |
72 | seg_offset = (segment + (NUM_REGIONS32 - 7)) * NUM_PTS_IN_REGION16; |
73 | coordinates_x[seg_offset].x = region_size; |
74 | |
75 | for (index = seg_offset + 1; |
76 | index < seg_offset + NUM_PTS_IN_REGION16; |
77 | index++) { |
78 | coordinates_x[index].x = dc_fixpt_add |
79 | (coordinates_x[index-1].x, increment); |
80 | } |
81 | } |
82 | } |
83 | |
84 | void log_x_points_distribution(struct dal_logger *logger) |
85 | { |
86 | int i = 0; |
87 | |
88 | if (logger != NULL((void *)0)) { |
89 | LOG_GAMMA_WRITE("Log X Distribution\n"); |
90 | |
91 | for (i = 0; i < MAX_HW_POINTS(16*32); i++) |
92 | LOG_GAMMA_WRITE("%llu\n", coordinates_x[i].x.value); |
93 | } |
94 | } |
95 | |
96 | static void compute_pq(struct fixed31_32 in_x, struct fixed31_32 *out_y) |
97 | { |
98 | /* consts for PQ gamma formula. */ |
99 | const struct fixed31_32 m1 = |
100 | dc_fixpt_from_fraction(159301758, 1000000000); |
101 | const struct fixed31_32 m2 = |
102 | dc_fixpt_from_fraction(7884375, 100000); |
103 | const struct fixed31_32 c1 = |
104 | dc_fixpt_from_fraction(8359375, 10000000); |
105 | const struct fixed31_32 c2 = |
106 | dc_fixpt_from_fraction(188515625, 10000000); |
107 | const struct fixed31_32 c3 = |
108 | dc_fixpt_from_fraction(186875, 10000); |
109 | |
110 | struct fixed31_32 l_pow_m1; |
111 | struct fixed31_32 base; |
112 | |
113 | if (dc_fixpt_lt(in_x, dc_fixpt_zero)) |
114 | in_x = dc_fixpt_zero; |
115 | |
116 | l_pow_m1 = dc_fixpt_pow(in_x, m1); |
117 | base = dc_fixpt_div( |
118 | dc_fixpt_add(c1, |
119 | (dc_fixpt_mul(c2, l_pow_m1))), |
120 | dc_fixpt_add(dc_fixpt_one, |
121 | (dc_fixpt_mul(c3, l_pow_m1)))); |
122 | *out_y = dc_fixpt_pow(base, m2); |
123 | } |
124 | |
125 | static void compute_de_pq(struct fixed31_32 in_x, struct fixed31_32 *out_y) |
126 | { |
127 | /* consts for dePQ gamma formula. */ |
128 | const struct fixed31_32 m1 = |
129 | dc_fixpt_from_fraction(159301758, 1000000000); |
130 | const struct fixed31_32 m2 = |
131 | dc_fixpt_from_fraction(7884375, 100000); |
132 | const struct fixed31_32 c1 = |
133 | dc_fixpt_from_fraction(8359375, 10000000); |
134 | const struct fixed31_32 c2 = |
135 | dc_fixpt_from_fraction(188515625, 10000000); |
136 | const struct fixed31_32 c3 = |
137 | dc_fixpt_from_fraction(186875, 10000); |
138 | |
139 | struct fixed31_32 l_pow_m1; |
140 | struct fixed31_32 base, div; |
141 | struct fixed31_32 base2; |
142 | |
143 | |
144 | if (dc_fixpt_lt(in_x, dc_fixpt_zero)) |
145 | in_x = dc_fixpt_zero; |
146 | |
147 | l_pow_m1 = dc_fixpt_pow(in_x, |
148 | dc_fixpt_div(dc_fixpt_one, m2)); |
149 | base = dc_fixpt_sub(l_pow_m1, c1); |
150 | |
151 | div = dc_fixpt_sub(c2, dc_fixpt_mul(c3, l_pow_m1)); |
152 | |
153 | base2 = dc_fixpt_div(base, div); |
154 | //avoid complex numbers |
155 | if (dc_fixpt_lt(base2, dc_fixpt_zero)) |
156 | base2 = dc_fixpt_sub(dc_fixpt_zero, base2); |
157 | |
158 | |
159 | *out_y = dc_fixpt_pow(base2, dc_fixpt_div(dc_fixpt_one, m1)); |
160 | |
161 | } |
162 | |
163 | |
164 | /*de gamma, none linear to linear*/ |
165 | static void compute_hlg_eotf(struct fixed31_32 in_x, |
166 | struct fixed31_32 *out_y, |
167 | uint32_t sdr_white_level, uint32_t max_luminance_nits) |
168 | { |
169 | struct fixed31_32 a; |
170 | struct fixed31_32 b; |
171 | struct fixed31_32 c; |
172 | struct fixed31_32 threshold; |
173 | struct fixed31_32 x; |
174 | |
175 | struct fixed31_32 scaling_factor = |
176 | dc_fixpt_from_fraction(max_luminance_nits, sdr_white_level); |
177 | a = dc_fixpt_from_fraction(17883277, 100000000); |
178 | b = dc_fixpt_from_fraction(28466892, 100000000); |
179 | c = dc_fixpt_from_fraction(55991073, 100000000); |
180 | threshold = dc_fixpt_from_fraction(1, 2); |
181 | |
182 | if (dc_fixpt_lt(in_x, threshold)) { |
183 | x = dc_fixpt_mul(in_x, in_x); |
184 | x = dc_fixpt_div_int(x, 3); |
185 | } else { |
186 | x = dc_fixpt_sub(in_x, c); |
187 | x = dc_fixpt_div(x, a); |
188 | x = dc_fixpt_exp(x); |
189 | x = dc_fixpt_add(x, b); |
190 | x = dc_fixpt_div_int(x, 12); |
191 | } |
192 | *out_y = dc_fixpt_mul(x, scaling_factor); |
193 | |
194 | } |
195 | |
196 | /*re gamma, linear to none linear*/ |
197 | static void compute_hlg_oetf(struct fixed31_32 in_x, struct fixed31_32 *out_y, |
198 | uint32_t sdr_white_level, uint32_t max_luminance_nits) |
199 | { |
200 | struct fixed31_32 a; |
201 | struct fixed31_32 b; |
202 | struct fixed31_32 c; |
203 | struct fixed31_32 threshold; |
204 | struct fixed31_32 x; |
205 | |
206 | struct fixed31_32 scaling_factor = |
207 | dc_fixpt_from_fraction(sdr_white_level, max_luminance_nits); |
208 | a = dc_fixpt_from_fraction(17883277, 100000000); |
209 | b = dc_fixpt_from_fraction(28466892, 100000000); |
210 | c = dc_fixpt_from_fraction(55991073, 100000000); |
211 | threshold = dc_fixpt_from_fraction(1, 12); |
212 | x = dc_fixpt_mul(in_x, scaling_factor); |
213 | |
214 | |
215 | if (dc_fixpt_lt(x, threshold)) { |
216 | x = dc_fixpt_mul(x, dc_fixpt_from_fraction(3, 1)); |
217 | *out_y = dc_fixpt_pow(x, dc_fixpt_half); |
218 | } else { |
219 | x = dc_fixpt_mul(x, dc_fixpt_from_fraction(12, 1)); |
220 | x = dc_fixpt_sub(x, b); |
221 | x = dc_fixpt_log(x); |
222 | x = dc_fixpt_mul(a, x); |
223 | *out_y = dc_fixpt_add(x, c); |
224 | } |
225 | } |
226 | |
227 | |
228 | /* one-time pre-compute PQ values - only for sdr_white_level 80 */ |
229 | void precompute_pq(void) |
230 | { |
231 | int i; |
232 | struct fixed31_32 x; |
233 | const struct hw_x_point *coord_x = coordinates_x + 32; |
234 | struct fixed31_32 scaling_factor = |
235 | dc_fixpt_from_fraction(80, 10000); |
236 | |
237 | struct fixed31_32 *pq_table = mod_color_get_table(type_pq_table); |
238 | |
239 | /* pow function has problems with arguments too small */ |
240 | for (i = 0; i < 32; i++) |
241 | pq_table[i] = dc_fixpt_zero; |
242 | |
243 | for (i = 32; i <= MAX_HW_POINTS(16*32); i++) { |
244 | x = dc_fixpt_mul(coord_x->x, scaling_factor); |
245 | compute_pq(x, &pq_table[i]); |
246 | ++coord_x; |
247 | } |
248 | } |
249 | |
250 | /* one-time pre-compute dePQ values - only for max pixel value 125 FP16 */ |
251 | void precompute_de_pq(void) |
252 | { |
253 | int i; |
254 | struct fixed31_32 y; |
255 | uint32_t begin_index, end_index; |
256 | |
257 | struct fixed31_32 scaling_factor = dc_fixpt_from_int(125); |
258 | struct fixed31_32 *de_pq_table = mod_color_get_table(type_de_pq_table); |
259 | /* X points is 2^-25 to 2^7 |
260 | * De-gamma X is 2^-12 to 2^0 – we are skipping first -12-(-25) = 13 regions |
261 | */ |
262 | begin_index = 13 * NUM_PTS_IN_REGION16; |
263 | end_index = begin_index + 12 * NUM_PTS_IN_REGION16; |
264 | |
265 | for (i = 0; i <= begin_index; i++) |
266 | de_pq_table[i] = dc_fixpt_zero; |
267 | |
268 | for (; i <= end_index; i++) { |
269 | compute_de_pq(coordinates_x[i].x, &y); |
270 | de_pq_table[i] = dc_fixpt_mul(y, scaling_factor); |
271 | } |
272 | |
273 | for (; i <= MAX_HW_POINTS(16*32); i++) |
274 | de_pq_table[i] = de_pq_table[i-1]; |
275 | } |
276 | struct dividers { |
277 | struct fixed31_32 divider1; |
278 | struct fixed31_32 divider2; |
279 | struct fixed31_32 divider3; |
280 | }; |
281 | |
282 | |
283 | static bool_Bool build_coefficients(struct gamma_coefficients *coefficients, enum dc_transfer_func_predefined type) |
284 | { |
285 | |
286 | uint32_t i = 0; |
287 | uint32_t index = 0; |
288 | bool_Bool ret = true1; |
289 | |
290 | if (type == TRANSFER_FUNCTION_SRGB) |
291 | index = 0; |
292 | else if (type == TRANSFER_FUNCTION_BT709) |
293 | index = 1; |
294 | else if (type == TRANSFER_FUNCTION_GAMMA22) |
295 | index = 2; |
296 | else if (type == TRANSFER_FUNCTION_GAMMA24) |
297 | index = 3; |
298 | else if (type == TRANSFER_FUNCTION_GAMMA26) |
299 | index = 4; |
300 | else { |
301 | ret = false0; |
302 | goto release; |
303 | } |
304 | |
305 | do { |
306 | coefficients->a0[i] = dc_fixpt_from_fraction( |
307 | gamma_numerator01[index], 10000000); |
308 | coefficients->a1[i] = dc_fixpt_from_fraction( |
309 | gamma_numerator02[index], 1000); |
310 | coefficients->a2[i] = dc_fixpt_from_fraction( |
311 | gamma_numerator03[index], 1000); |
312 | coefficients->a3[i] = dc_fixpt_from_fraction( |
313 | gamma_numerator04[index], 1000); |
314 | coefficients->user_gamma[i] = dc_fixpt_from_fraction( |
315 | gamma_numerator05[index], 1000); |
316 | |
317 | ++i; |
318 | } while (i != ARRAY_SIZE(coefficients->a0)(sizeof((coefficients->a0)) / sizeof((coefficients->a0) [0]))); |
319 | release: |
320 | return ret; |
321 | } |
322 | |
323 | static struct fixed31_32 translate_from_linear_space( |
324 | struct translate_from_linear_space_args *args) |
325 | { |
326 | const struct fixed31_32 one = dc_fixpt_from_int(1); |
327 | |
328 | struct fixed31_32 scratch_1, scratch_2; |
329 | struct calculate_buffer *cal_buffer = args->cal_buffer; |
330 | |
331 | if (dc_fixpt_le(one, args->arg)) |
332 | return one; |
333 | |
334 | if (dc_fixpt_le(args->arg, dc_fixpt_neg(args->a0))) { |
335 | scratch_1 = dc_fixpt_add(one, args->a3); |
336 | scratch_2 = dc_fixpt_pow( |
337 | dc_fixpt_neg(args->arg), |
338 | dc_fixpt_recip(args->gamma)); |
339 | scratch_1 = dc_fixpt_mul(scratch_1, scratch_2); |
340 | scratch_1 = dc_fixpt_sub(args->a2, scratch_1); |
341 | |
342 | return scratch_1; |
343 | } else if (dc_fixpt_le(args->a0, args->arg)) { |
344 | if (cal_buffer->buffer_index == 0) { |
345 | cal_buffer->gamma_of_2 = dc_fixpt_pow(dc_fixpt_from_int(2), |
346 | dc_fixpt_recip(args->gamma)); |
347 | } |
348 | scratch_1 = dc_fixpt_add(one, args->a3); |
349 | if (cal_buffer->buffer_index < 16) |
350 | scratch_2 = dc_fixpt_pow(args->arg, |
351 | dc_fixpt_recip(args->gamma)); |
352 | else |
353 | scratch_2 = dc_fixpt_mul(cal_buffer->gamma_of_2, |
354 | cal_buffer->buffer[cal_buffer->buffer_index%16]); |
355 | |
356 | if (cal_buffer->buffer_index != -1) { |
357 | cal_buffer->buffer[cal_buffer->buffer_index%16] = scratch_2; |
358 | cal_buffer->buffer_index++; |
359 | } |
360 | |
361 | scratch_1 = dc_fixpt_mul(scratch_1, scratch_2); |
362 | scratch_1 = dc_fixpt_sub(scratch_1, args->a2); |
363 | |
364 | return scratch_1; |
365 | } |
366 | else |
367 | return dc_fixpt_mul(args->arg, args->a1); |
368 | } |
369 | |
370 | |
371 | static struct fixed31_32 translate_from_linear_space_long( |
372 | struct translate_from_linear_space_args *args) |
373 | { |
374 | const struct fixed31_32 one = dc_fixpt_from_int(1); |
375 | |
376 | if (dc_fixpt_lt(one, args->arg)) |
377 | return one; |
378 | |
379 | if (dc_fixpt_le(args->arg, dc_fixpt_neg(args->a0))) |
380 | return dc_fixpt_sub( |
381 | args->a2, |
382 | dc_fixpt_mul( |
383 | dc_fixpt_add( |
384 | one, |
385 | args->a3), |
386 | dc_fixpt_pow( |
387 | dc_fixpt_neg(args->arg), |
388 | dc_fixpt_recip(args->gamma)))); |
389 | else if (dc_fixpt_le(args->a0, args->arg)) |
390 | return dc_fixpt_sub( |
391 | dc_fixpt_mul( |
392 | dc_fixpt_add( |
393 | one, |
394 | args->a3), |
395 | dc_fixpt_pow( |
396 | args->arg, |
397 | dc_fixpt_recip(args->gamma))), |
398 | args->a2); |
399 | else |
400 | return dc_fixpt_mul( |
401 | args->arg, |
402 | args->a1); |
403 | } |
404 | |
405 | static struct fixed31_32 calculate_gamma22(struct fixed31_32 arg, bool_Bool use_eetf, struct calculate_buffer *cal_buffer) |
406 | { |
407 | struct fixed31_32 gamma = dc_fixpt_from_fraction(22, 10); |
408 | struct translate_from_linear_space_args scratch_gamma_args; |
409 | |
410 | scratch_gamma_args.arg = arg; |
411 | scratch_gamma_args.a0 = dc_fixpt_zero; |
412 | scratch_gamma_args.a1 = dc_fixpt_zero; |
413 | scratch_gamma_args.a2 = dc_fixpt_zero; |
414 | scratch_gamma_args.a3 = dc_fixpt_zero; |
415 | scratch_gamma_args.cal_buffer = cal_buffer; |
416 | scratch_gamma_args.gamma = gamma; |
417 | |
418 | if (use_eetf) |
419 | return translate_from_linear_space_long(&scratch_gamma_args); |
420 | |
421 | return translate_from_linear_space(&scratch_gamma_args); |
422 | } |
423 | |
424 | |
425 | static struct fixed31_32 translate_to_linear_space( |
426 | struct fixed31_32 arg, |
427 | struct fixed31_32 a0, |
428 | struct fixed31_32 a1, |
429 | struct fixed31_32 a2, |
430 | struct fixed31_32 a3, |
431 | struct fixed31_32 gamma) |
432 | { |
433 | struct fixed31_32 linear; |
434 | |
435 | a0 = dc_fixpt_mul(a0, a1); |
436 | if (dc_fixpt_le(arg, dc_fixpt_neg(a0))) |
437 | |
438 | linear = dc_fixpt_neg( |
439 | dc_fixpt_pow( |
440 | dc_fixpt_div( |
441 | dc_fixpt_sub(a2, arg), |
442 | dc_fixpt_add( |
443 | dc_fixpt_one, a3)), gamma)); |
444 | |
445 | else if (dc_fixpt_le(dc_fixpt_neg(a0), arg) && |
446 | dc_fixpt_le(arg, a0)) |
447 | linear = dc_fixpt_div(arg, a1); |
448 | else |
449 | linear = dc_fixpt_pow( |
450 | dc_fixpt_div( |
451 | dc_fixpt_add(a2, arg), |
452 | dc_fixpt_add( |
453 | dc_fixpt_one, a3)), gamma); |
454 | |
455 | return linear; |
456 | } |
457 | |
458 | static struct fixed31_32 translate_from_linear_space_ex( |
459 | struct fixed31_32 arg, |
460 | struct gamma_coefficients *coeff, |
461 | uint32_t color_index, |
462 | struct calculate_buffer *cal_buffer) |
463 | { |
464 | struct translate_from_linear_space_args scratch_gamma_args; |
465 | |
466 | scratch_gamma_args.arg = arg; |
467 | scratch_gamma_args.a0 = coeff->a0[color_index]; |
468 | scratch_gamma_args.a1 = coeff->a1[color_index]; |
469 | scratch_gamma_args.a2 = coeff->a2[color_index]; |
470 | scratch_gamma_args.a3 = coeff->a3[color_index]; |
471 | scratch_gamma_args.gamma = coeff->user_gamma[color_index]; |
472 | scratch_gamma_args.cal_buffer = cal_buffer; |
473 | |
474 | return translate_from_linear_space(&scratch_gamma_args); |
475 | } |
476 | |
477 | |
478 | static inline struct fixed31_32 translate_to_linear_space_ex( |
479 | struct fixed31_32 arg, |
480 | struct gamma_coefficients *coeff, |
481 | uint32_t color_index) |
482 | { |
483 | return translate_to_linear_space( |
484 | arg, |
485 | coeff->a0[color_index], |
486 | coeff->a1[color_index], |
487 | coeff->a2[color_index], |
488 | coeff->a3[color_index], |
489 | coeff->user_gamma[color_index]); |
490 | } |
491 | |
492 | |
493 | static bool_Bool find_software_points( |
494 | const struct dc_gamma *ramp, |
495 | const struct gamma_pixel *axis_x, |
496 | struct fixed31_32 hw_point, |
497 | enum channel_name channel, |
498 | uint32_t *index_to_start, |
499 | uint32_t *index_left, |
500 | uint32_t *index_right, |
501 | enum hw_point_position *pos) |
502 | { |
503 | const uint32_t max_number = ramp->num_entries + 3; |
504 | |
505 | struct fixed31_32 left, right; |
506 | |
507 | uint32_t i = *index_to_start; |
508 | |
509 | while (i < max_number) { |
510 | if (channel == CHANNEL_NAME_RED) { |
511 | left = axis_x[i].r; |
512 | |
513 | if (i < max_number - 1) |
514 | right = axis_x[i + 1].r; |
515 | else |
516 | right = axis_x[max_number - 1].r; |
517 | } else if (channel == CHANNEL_NAME_GREEN) { |
518 | left = axis_x[i].g; |
519 | |
520 | if (i < max_number - 1) |
521 | right = axis_x[i + 1].g; |
522 | else |
523 | right = axis_x[max_number - 1].g; |
524 | } else { |
525 | left = axis_x[i].b; |
526 | |
527 | if (i < max_number - 1) |
528 | right = axis_x[i + 1].b; |
529 | else |
530 | right = axis_x[max_number - 1].b; |
531 | } |
532 | |
533 | if (dc_fixpt_le(left, hw_point) && |
534 | dc_fixpt_le(hw_point, right)) { |
535 | *index_to_start = i; |
536 | *index_left = i; |
537 | |
538 | if (i < max_number - 1) |
539 | *index_right = i + 1; |
540 | else |
541 | *index_right = max_number - 1; |
542 | |
543 | *pos = HW_POINT_POSITION_MIDDLE; |
544 | |
545 | return true1; |
546 | } else if ((i == *index_to_start) && |
547 | dc_fixpt_le(hw_point, left)) { |
548 | *index_to_start = i; |
549 | *index_left = i; |
550 | *index_right = i; |
551 | |
552 | *pos = HW_POINT_POSITION_LEFT; |
553 | |
554 | return true1; |
555 | } else if ((i == max_number - 1) && |
556 | dc_fixpt_le(right, hw_point)) { |
557 | *index_to_start = i; |
558 | *index_left = i; |
559 | *index_right = i; |
560 | |
561 | *pos = HW_POINT_POSITION_RIGHT; |
562 | |
563 | return true1; |
564 | } |
565 | |
566 | ++i; |
567 | } |
568 | |
569 | return false0; |
570 | } |
571 | |
572 | static bool_Bool build_custom_gamma_mapping_coefficients_worker( |
573 | const struct dc_gamma *ramp, |
574 | struct pixel_gamma_point *coeff, |
575 | const struct hw_x_point *coordinates_x, |
576 | const struct gamma_pixel *axis_x, |
577 | enum channel_name channel, |
578 | uint32_t number_of_points) |
579 | { |
580 | uint32_t i = 0; |
581 | |
582 | while (i <= number_of_points) { |
583 | struct fixed31_32 coord_x; |
584 | |
585 | uint32_t index_to_start = 0; |
586 | uint32_t index_left = 0; |
587 | uint32_t index_right = 0; |
588 | |
589 | enum hw_point_position hw_pos; |
590 | |
591 | struct gamma_point *point; |
592 | |
593 | struct fixed31_32 left_pos; |
594 | struct fixed31_32 right_pos; |
595 | |
596 | if (channel == CHANNEL_NAME_RED) |
597 | coord_x = coordinates_x[i].regamma_y_red; |
598 | else if (channel == CHANNEL_NAME_GREEN) |
599 | coord_x = coordinates_x[i].regamma_y_green; |
600 | else |
601 | coord_x = coordinates_x[i].regamma_y_blue; |
602 | |
603 | if (!find_software_points( |
604 | ramp, axis_x, coord_x, channel, |
605 | &index_to_start, &index_left, &index_right, &hw_pos)) { |
606 | BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 606); do {} while (0); } while (0); |
607 | return false0; |
608 | } |
609 | |
610 | if (index_left >= ramp->num_entries + 3) { |
611 | BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 611); do {} while (0); } while (0); |
612 | return false0; |
613 | } |
614 | |
615 | if (index_right >= ramp->num_entries + 3) { |
616 | BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 616); do {} while (0); } while (0); |
617 | return false0; |
618 | } |
619 | |
620 | if (channel == CHANNEL_NAME_RED) { |
621 | point = &coeff[i].r; |
622 | |
623 | left_pos = axis_x[index_left].r; |
624 | right_pos = axis_x[index_right].r; |
625 | } else if (channel == CHANNEL_NAME_GREEN) { |
626 | point = &coeff[i].g; |
627 | |
628 | left_pos = axis_x[index_left].g; |
629 | right_pos = axis_x[index_right].g; |
630 | } else { |
631 | point = &coeff[i].b; |
632 | |
633 | left_pos = axis_x[index_left].b; |
634 | right_pos = axis_x[index_right].b; |
635 | } |
636 | |
637 | if (hw_pos == HW_POINT_POSITION_MIDDLE) |
638 | point->coeff = dc_fixpt_div( |
639 | dc_fixpt_sub( |
640 | coord_x, |
641 | left_pos), |
642 | dc_fixpt_sub( |
643 | right_pos, |
644 | left_pos)); |
645 | else if (hw_pos == HW_POINT_POSITION_LEFT) |
646 | point->coeff = dc_fixpt_zero; |
647 | else if (hw_pos == HW_POINT_POSITION_RIGHT) |
648 | point->coeff = dc_fixpt_from_int(2); |
649 | else { |
650 | BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 650); do {} while (0); } while (0); |
651 | return false0; |
652 | } |
653 | |
654 | point->left_index = index_left; |
655 | point->right_index = index_right; |
656 | point->pos = hw_pos; |
657 | |
658 | ++i; |
659 | } |
660 | |
661 | return true1; |
662 | } |
663 | |
664 | static struct fixed31_32 calculate_mapped_value( |
665 | struct pwl_float_data *rgb, |
666 | const struct pixel_gamma_point *coeff, |
667 | enum channel_name channel, |
668 | uint32_t max_index) |
669 | { |
670 | const struct gamma_point *point; |
671 | |
672 | struct fixed31_32 result; |
673 | |
674 | if (channel == CHANNEL_NAME_RED) |
675 | point = &coeff->r; |
676 | else if (channel == CHANNEL_NAME_GREEN) |
677 | point = &coeff->g; |
678 | else |
679 | point = &coeff->b; |
680 | |
681 | if ((point->left_index < 0) || (point->left_index > max_index)) { |
682 | BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 682); do {} while (0); } while (0); |
683 | return dc_fixpt_zero; |
684 | } |
685 | |
686 | if ((point->right_index < 0) || (point->right_index > max_index)) { |
687 | BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 687); do {} while (0); } while (0); |
688 | return dc_fixpt_zero; |
689 | } |
690 | |
691 | if (point->pos == HW_POINT_POSITION_MIDDLE) |
692 | if (channel == CHANNEL_NAME_RED) |
693 | result = dc_fixpt_add( |
694 | dc_fixpt_mul( |
695 | point->coeff, |
696 | dc_fixpt_sub( |
697 | rgb[point->right_index].r, |
698 | rgb[point->left_index].r)), |
699 | rgb[point->left_index].r); |
700 | else if (channel == CHANNEL_NAME_GREEN) |
701 | result = dc_fixpt_add( |
702 | dc_fixpt_mul( |
703 | point->coeff, |
704 | dc_fixpt_sub( |
705 | rgb[point->right_index].g, |
706 | rgb[point->left_index].g)), |
707 | rgb[point->left_index].g); |
708 | else |
709 | result = dc_fixpt_add( |
710 | dc_fixpt_mul( |
711 | point->coeff, |
712 | dc_fixpt_sub( |
713 | rgb[point->right_index].b, |
714 | rgb[point->left_index].b)), |
715 | rgb[point->left_index].b); |
716 | else if (point->pos == HW_POINT_POSITION_LEFT) { |
717 | BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 717); do {} while (0); } while (0); |
718 | result = dc_fixpt_zero; |
719 | } else { |
720 | BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 720); do {} while (0); } while (0); |
721 | result = dc_fixpt_one; |
722 | } |
723 | |
724 | return result; |
725 | } |
726 | |
727 | static void build_pq(struct pwl_float_data_ex *rgb_regamma, |
728 | uint32_t hw_points_num, |
729 | const struct hw_x_point *coordinate_x, |
730 | uint32_t sdr_white_level) |
731 | { |
732 | uint32_t i, start_index; |
733 | |
734 | struct pwl_float_data_ex *rgb = rgb_regamma; |
735 | const struct hw_x_point *coord_x = coordinate_x; |
736 | struct fixed31_32 x; |
737 | struct fixed31_32 output; |
738 | struct fixed31_32 scaling_factor = |
739 | dc_fixpt_from_fraction(sdr_white_level, 10000); |
740 | struct fixed31_32 *pq_table = mod_color_get_table(type_pq_table); |
741 | |
742 | if (!mod_color_is_table_init(type_pq_table) && sdr_white_level == 80) { |
743 | precompute_pq(); |
744 | mod_color_set_table_init_state(type_pq_table, true1); |
745 | } |
746 | |
747 | /* TODO: start index is from segment 2^-24, skipping first segment |
748 | * due to x values too small for power calculations |
749 | */ |
750 | start_index = 32; |
751 | rgb += start_index; |
752 | coord_x += start_index; |
753 | |
754 | for (i = start_index; i <= hw_points_num; i++) { |
755 | /* Multiply 0.008 as regamma is 0-1 and FP16 input is 0-125. |
756 | * FP 1.0 = 80nits |
757 | */ |
758 | if (sdr_white_level == 80) { |
759 | output = pq_table[i]; |
760 | } else { |
761 | x = dc_fixpt_mul(coord_x->x, scaling_factor); |
762 | compute_pq(x, &output); |
763 | } |
764 | |
765 | /* should really not happen? */ |
766 | if (dc_fixpt_lt(output, dc_fixpt_zero)) |
767 | output = dc_fixpt_zero; |
768 | else if (dc_fixpt_lt(dc_fixpt_one, output)) |
769 | output = dc_fixpt_one; |
770 | |
771 | rgb->r = output; |
772 | rgb->g = output; |
773 | rgb->b = output; |
774 | |
775 | ++coord_x; |
776 | ++rgb; |
777 | } |
778 | } |
779 | |
780 | static void build_de_pq(struct pwl_float_data_ex *de_pq, |
781 | uint32_t hw_points_num, |
782 | const struct hw_x_point *coordinate_x) |
783 | { |
784 | uint32_t i; |
785 | struct fixed31_32 output; |
786 | struct fixed31_32 *de_pq_table = mod_color_get_table(type_de_pq_table); |
787 | struct fixed31_32 scaling_factor = dc_fixpt_from_int(125); |
788 | |
789 | if (!mod_color_is_table_init(type_de_pq_table)) { |
790 | precompute_de_pq(); |
791 | mod_color_set_table_init_state(type_de_pq_table, true1); |
792 | } |
793 | |
794 | |
795 | for (i = 0; i <= hw_points_num; i++) { |
796 | output = de_pq_table[i]; |
797 | /* should really not happen? */ |
798 | if (dc_fixpt_lt(output, dc_fixpt_zero)) |
799 | output = dc_fixpt_zero; |
800 | else if (dc_fixpt_lt(scaling_factor, output)) |
801 | output = scaling_factor; |
802 | de_pq[i].r = output; |
803 | de_pq[i].g = output; |
804 | de_pq[i].b = output; |
805 | } |
806 | } |
807 | |
808 | static bool_Bool build_regamma(struct pwl_float_data_ex *rgb_regamma, |
809 | uint32_t hw_points_num, |
810 | const struct hw_x_point *coordinate_x, |
811 | enum dc_transfer_func_predefined type, |
812 | struct calculate_buffer *cal_buffer) |
813 | { |
814 | uint32_t i; |
815 | bool_Bool ret = false0; |
816 | |
817 | struct gamma_coefficients *coeff; |
818 | struct pwl_float_data_ex *rgb = rgb_regamma; |
819 | const struct hw_x_point *coord_x = coordinate_x; |
820 | |
821 | coeff = kvzalloc(sizeof(*coeff), GFP_KERNEL(0x0001 | 0x0004)); |
822 | if (!coeff) |
823 | goto release; |
824 | |
825 | if (!build_coefficients(coeff, type)) |
826 | goto release; |
827 | |
828 | memset(cal_buffer->buffer, 0, NUM_PTS_IN_REGION * sizeof(struct fixed31_32))__builtin_memset((cal_buffer->buffer), (0), (16 * sizeof(struct fixed31_32))); |
829 | cal_buffer->buffer_index = 0; // see variable definition for more info |
830 | |
831 | i = 0; |
832 | while (i <= hw_points_num) { |
833 | /*TODO use y vs r,g,b*/ |
834 | rgb->r = translate_from_linear_space_ex( |
835 | coord_x->x, coeff, 0, cal_buffer); |
836 | rgb->g = rgb->r; |
837 | rgb->b = rgb->r; |
838 | ++coord_x; |
839 | ++rgb; |
840 | ++i; |
841 | } |
842 | cal_buffer->buffer_index = -1; |
843 | ret = true1; |
844 | release: |
845 | kvfree(coeff); |
846 | return ret; |
847 | } |
848 | |
849 | static void hermite_spline_eetf(struct fixed31_32 input_x, |
850 | struct fixed31_32 max_display, |
851 | struct fixed31_32 min_display, |
852 | struct fixed31_32 max_content, |
853 | struct fixed31_32 *out_x) |
854 | { |
855 | struct fixed31_32 min_lum_pq; |
856 | struct fixed31_32 max_lum_pq; |
857 | struct fixed31_32 max_content_pq; |
858 | struct fixed31_32 ks; |
859 | struct fixed31_32 E1; |
860 | struct fixed31_32 E2; |
861 | struct fixed31_32 E3; |
862 | struct fixed31_32 t; |
863 | struct fixed31_32 t2; |
864 | struct fixed31_32 t3; |
865 | struct fixed31_32 two; |
866 | struct fixed31_32 three; |
867 | struct fixed31_32 temp1; |
868 | struct fixed31_32 temp2; |
869 | struct fixed31_32 a = dc_fixpt_from_fraction(15, 10); |
Value stored to 'a' during its initialization is never read | |
870 | struct fixed31_32 b = dc_fixpt_from_fraction(5, 10); |
871 | struct fixed31_32 epsilon = dc_fixpt_from_fraction(1, 1000000); // dc_fixpt_epsilon is a bit too small |
872 | |
873 | if (dc_fixpt_eq(max_content, dc_fixpt_zero)) { |
874 | *out_x = dc_fixpt_zero; |
875 | return; |
876 | } |
877 | |
878 | compute_pq(input_x, &E1); |
879 | compute_pq(dc_fixpt_div(min_display, max_content), &min_lum_pq); |
880 | compute_pq(dc_fixpt_div(max_display, max_content), &max_lum_pq); |
881 | compute_pq(dc_fixpt_one, &max_content_pq); // always 1? DAL2 code is weird |
882 | a = dc_fixpt_div(dc_fixpt_add(dc_fixpt_one, b), max_content_pq); // (1+b)/maxContent |
883 | ks = dc_fixpt_sub(dc_fixpt_mul(a, max_lum_pq), b); // a * max_lum_pq - b |
884 | |
885 | if (dc_fixpt_lt(E1, ks)) |
886 | E2 = E1; |
887 | else if (dc_fixpt_le(ks, E1) && dc_fixpt_le(E1, dc_fixpt_one)) { |
888 | if (dc_fixpt_lt(epsilon, dc_fixpt_sub(dc_fixpt_one, ks))) |
889 | // t = (E1 - ks) / (1 - ks) |
890 | t = dc_fixpt_div(dc_fixpt_sub(E1, ks), |
891 | dc_fixpt_sub(dc_fixpt_one, ks)); |
892 | else |
893 | t = dc_fixpt_zero; |
894 | |
895 | two = dc_fixpt_from_int(2); |
896 | three = dc_fixpt_from_int(3); |
897 | |
898 | t2 = dc_fixpt_mul(t, t); |
899 | t3 = dc_fixpt_mul(t2, t); |
900 | temp1 = dc_fixpt_mul(two, t3); |
901 | temp2 = dc_fixpt_mul(three, t2); |
902 | |
903 | // (2t^3 - 3t^2 + 1) * ks |
904 | E2 = dc_fixpt_mul(ks, dc_fixpt_add(dc_fixpt_one, |
905 | dc_fixpt_sub(temp1, temp2))); |
906 | |
907 | // (-2t^3 + 3t^2) * max_lum_pq |
908 | E2 = dc_fixpt_add(E2, dc_fixpt_mul(max_lum_pq, |
909 | dc_fixpt_sub(temp2, temp1))); |
910 | |
911 | temp1 = dc_fixpt_mul(two, t2); |
912 | temp2 = dc_fixpt_sub(dc_fixpt_one, ks); |
913 | |
914 | // (t^3 - 2t^2 + t) * (1-ks) |
915 | E2 = dc_fixpt_add(E2, dc_fixpt_mul(temp2, |
916 | dc_fixpt_add(t, dc_fixpt_sub(t3, temp1)))); |
917 | } else |
918 | E2 = dc_fixpt_one; |
919 | |
920 | temp1 = dc_fixpt_sub(dc_fixpt_one, E2); |
921 | temp2 = dc_fixpt_mul(temp1, temp1); |
922 | temp2 = dc_fixpt_mul(temp2, temp2); |
923 | // temp2 = (1-E2)^4 |
924 | |
925 | E3 = dc_fixpt_add(E2, dc_fixpt_mul(min_lum_pq, temp2)); |
926 | compute_de_pq(E3, out_x); |
927 | |
928 | *out_x = dc_fixpt_div(*out_x, dc_fixpt_div(max_display, max_content)); |
929 | } |
930 | |
931 | static bool_Bool build_freesync_hdr(struct pwl_float_data_ex *rgb_regamma, |
932 | uint32_t hw_points_num, |
933 | const struct hw_x_point *coordinate_x, |
934 | const struct freesync_hdr_tf_params *fs_params, |
935 | struct calculate_buffer *cal_buffer) |
936 | { |
937 | uint32_t i; |
938 | struct pwl_float_data_ex *rgb = rgb_regamma; |
939 | const struct hw_x_point *coord_x = coordinate_x; |
940 | struct fixed31_32 scaledX = dc_fixpt_zero; |
941 | struct fixed31_32 scaledX1 = dc_fixpt_zero; |
942 | struct fixed31_32 max_display; |
943 | struct fixed31_32 min_display; |
944 | struct fixed31_32 max_content; |
945 | struct fixed31_32 clip = dc_fixpt_one; |
946 | struct fixed31_32 output; |
947 | bool_Bool use_eetf = false0; |
948 | bool_Bool is_clipped = false0; |
949 | struct fixed31_32 sdr_white_level; |
950 | |
951 | if (fs_params->max_content == 0 || |
952 | fs_params->max_display == 0) |
953 | return false0; |
954 | |
955 | max_display = dc_fixpt_from_int(fs_params->max_display); |
956 | min_display = dc_fixpt_from_fraction(fs_params->min_display, 10000); |
957 | max_content = dc_fixpt_from_int(fs_params->max_content); |
958 | sdr_white_level = dc_fixpt_from_int(fs_params->sdr_white_level); |
959 | |
960 | if (fs_params->min_display > 1000) // cap at 0.1 at the bottom |
961 | min_display = dc_fixpt_from_fraction(1, 10); |
962 | if (fs_params->max_display < 100) // cap at 100 at the top |
963 | max_display = dc_fixpt_from_int(100); |
964 | |
965 | // only max used, we don't adjust min luminance |
966 | if (fs_params->max_content > fs_params->max_display) |
967 | use_eetf = true1; |
968 | else |
969 | max_content = max_display; |
970 | |
971 | if (!use_eetf) |
972 | cal_buffer->buffer_index = 0; // see var definition for more info |
973 | rgb += 32; // first 32 points have problems with fixed point, too small |
974 | coord_x += 32; |
975 | for (i = 32; i <= hw_points_num; i++) { |
976 | if (!is_clipped) { |
977 | if (use_eetf) { |
978 | /*max content is equal 1 */ |
979 | scaledX1 = dc_fixpt_div(coord_x->x, |
980 | dc_fixpt_div(max_content, sdr_white_level)); |
981 | hermite_spline_eetf(scaledX1, max_display, min_display, |
982 | max_content, &scaledX); |
983 | } else |
984 | scaledX = dc_fixpt_div(coord_x->x, |
985 | dc_fixpt_div(max_display, sdr_white_level)); |
986 | |
987 | if (dc_fixpt_lt(scaledX, clip)) { |
988 | if (dc_fixpt_lt(scaledX, dc_fixpt_zero)) |
989 | output = dc_fixpt_zero; |
990 | else |
991 | output = calculate_gamma22(scaledX, use_eetf, cal_buffer); |
992 | |
993 | rgb->r = output; |
994 | rgb->g = output; |
995 | rgb->b = output; |
996 | } else { |
997 | is_clipped = true1; |
998 | rgb->r = clip; |
999 | rgb->g = clip; |
1000 | rgb->b = clip; |
1001 | } |
1002 | } else { |
1003 | rgb->r = clip; |
1004 | rgb->g = clip; |
1005 | rgb->b = clip; |
1006 | } |
1007 | |
1008 | ++coord_x; |
1009 | ++rgb; |
1010 | } |
1011 | cal_buffer->buffer_index = -1; |
1012 | |
1013 | return true1; |
1014 | } |
1015 | |
1016 | static bool_Bool build_degamma(struct pwl_float_data_ex *curve, |
1017 | uint32_t hw_points_num, |
1018 | const struct hw_x_point *coordinate_x, enum dc_transfer_func_predefined type) |
1019 | { |
1020 | uint32_t i; |
1021 | struct gamma_coefficients coeff; |
1022 | uint32_t begin_index, end_index; |
1023 | bool_Bool ret = false0; |
1024 | |
1025 | if (!build_coefficients(&coeff, type)) |
1026 | goto release; |
1027 | |
1028 | i = 0; |
1029 | |
1030 | /* X points is 2^-25 to 2^7 |
1031 | * De-gamma X is 2^-12 to 2^0 – we are skipping first -12-(-25) = 13 regions |
1032 | */ |
1033 | begin_index = 13 * NUM_PTS_IN_REGION16; |
1034 | end_index = begin_index + 12 * NUM_PTS_IN_REGION16; |
1035 | |
1036 | while (i != begin_index) { |
1037 | curve[i].r = dc_fixpt_zero; |
1038 | curve[i].g = dc_fixpt_zero; |
1039 | curve[i].b = dc_fixpt_zero; |
1040 | i++; |
1041 | } |
1042 | |
1043 | while (i != end_index) { |
1044 | curve[i].r = translate_to_linear_space_ex( |
1045 | coordinate_x[i].x, &coeff, 0); |
1046 | curve[i].g = curve[i].r; |
1047 | curve[i].b = curve[i].r; |
1048 | i++; |
1049 | } |
1050 | while (i != hw_points_num + 1) { |
1051 | curve[i].r = dc_fixpt_one; |
1052 | curve[i].g = dc_fixpt_one; |
1053 | curve[i].b = dc_fixpt_one; |
1054 | i++; |
1055 | } |
1056 | ret = true1; |
1057 | release: |
1058 | return ret; |
1059 | } |
1060 | |
1061 | |
1062 | |
1063 | |
1064 | |
1065 | static void build_hlg_degamma(struct pwl_float_data_ex *degamma, |
1066 | uint32_t hw_points_num, |
1067 | const struct hw_x_point *coordinate_x, |
1068 | uint32_t sdr_white_level, uint32_t max_luminance_nits) |
1069 | { |
1070 | uint32_t i; |
1071 | |
1072 | struct pwl_float_data_ex *rgb = degamma; |
1073 | const struct hw_x_point *coord_x = coordinate_x; |
1074 | |
1075 | i = 0; |
1076 | //check when i == 434 |
1077 | while (i != hw_points_num + 1) { |
1078 | compute_hlg_eotf(coord_x->x, &rgb->r, sdr_white_level, max_luminance_nits); |
1079 | rgb->g = rgb->r; |
1080 | rgb->b = rgb->r; |
1081 | ++coord_x; |
1082 | ++rgb; |
1083 | ++i; |
1084 | } |
1085 | } |
1086 | |
1087 | |
1088 | static void build_hlg_regamma(struct pwl_float_data_ex *regamma, |
1089 | uint32_t hw_points_num, |
1090 | const struct hw_x_point *coordinate_x, |
1091 | uint32_t sdr_white_level, uint32_t max_luminance_nits) |
1092 | { |
1093 | uint32_t i; |
1094 | |
1095 | struct pwl_float_data_ex *rgb = regamma; |
1096 | const struct hw_x_point *coord_x = coordinate_x; |
1097 | |
1098 | i = 0; |
1099 | |
1100 | //when i == 471 |
1101 | while (i != hw_points_num + 1) { |
1102 | compute_hlg_oetf(coord_x->x, &rgb->r, sdr_white_level, max_luminance_nits); |
1103 | rgb->g = rgb->r; |
1104 | rgb->b = rgb->r; |
1105 | ++coord_x; |
1106 | ++rgb; |
1107 | ++i; |
1108 | } |
1109 | } |
1110 | |
1111 | static void scale_gamma(struct pwl_float_data *pwl_rgb, |
1112 | const struct dc_gamma *ramp, |
1113 | struct dividers dividers) |
1114 | { |
1115 | const struct fixed31_32 max_driver = dc_fixpt_from_int(0xFFFF); |
1116 | const struct fixed31_32 max_os = dc_fixpt_from_int(0xFF00); |
1117 | struct fixed31_32 scaler = max_os; |
1118 | uint32_t i; |
1119 | struct pwl_float_data *rgb = pwl_rgb; |
1120 | struct pwl_float_data *rgb_last = rgb + ramp->num_entries - 1; |
1121 | |
1122 | i = 0; |
1123 | |
1124 | do { |
1125 | if (dc_fixpt_lt(max_os, ramp->entries.red[i]) || |
1126 | dc_fixpt_lt(max_os, ramp->entries.green[i]) || |
1127 | dc_fixpt_lt(max_os, ramp->entries.blue[i])) { |
1128 | scaler = max_driver; |
1129 | break; |
1130 | } |
1131 | ++i; |
1132 | } while (i != ramp->num_entries); |
1133 | |
1134 | i = 0; |
1135 | |
1136 | do { |
1137 | rgb->r = dc_fixpt_div( |
1138 | ramp->entries.red[i], scaler); |
1139 | rgb->g = dc_fixpt_div( |
1140 | ramp->entries.green[i], scaler); |
1141 | rgb->b = dc_fixpt_div( |
1142 | ramp->entries.blue[i], scaler); |
1143 | |
1144 | ++rgb; |
1145 | ++i; |
1146 | } while (i != ramp->num_entries); |
1147 | |
1148 | rgb->r = dc_fixpt_mul(rgb_last->r, |
1149 | dividers.divider1); |
1150 | rgb->g = dc_fixpt_mul(rgb_last->g, |
1151 | dividers.divider1); |
1152 | rgb->b = dc_fixpt_mul(rgb_last->b, |
1153 | dividers.divider1); |
1154 | |
1155 | ++rgb; |
1156 | |
1157 | rgb->r = dc_fixpt_mul(rgb_last->r, |
1158 | dividers.divider2); |
1159 | rgb->g = dc_fixpt_mul(rgb_last->g, |
1160 | dividers.divider2); |
1161 | rgb->b = dc_fixpt_mul(rgb_last->b, |
1162 | dividers.divider2); |
1163 | |
1164 | ++rgb; |
1165 | |
1166 | rgb->r = dc_fixpt_mul(rgb_last->r, |
1167 | dividers.divider3); |
1168 | rgb->g = dc_fixpt_mul(rgb_last->g, |
1169 | dividers.divider3); |
1170 | rgb->b = dc_fixpt_mul(rgb_last->b, |
1171 | dividers.divider3); |
1172 | } |
1173 | |
1174 | static void scale_gamma_dx(struct pwl_float_data *pwl_rgb, |
1175 | const struct dc_gamma *ramp, |
1176 | struct dividers dividers) |
1177 | { |
1178 | uint32_t i; |
1179 | struct fixed31_32 min = dc_fixpt_zero; |
1180 | struct fixed31_32 max = dc_fixpt_one; |
1181 | |
1182 | struct fixed31_32 delta = dc_fixpt_zero; |
1183 | struct fixed31_32 offset = dc_fixpt_zero; |
1184 | |
1185 | for (i = 0 ; i < ramp->num_entries; i++) { |
1186 | if (dc_fixpt_lt(ramp->entries.red[i], min)) |
1187 | min = ramp->entries.red[i]; |
1188 | |
1189 | if (dc_fixpt_lt(ramp->entries.green[i], min)) |
1190 | min = ramp->entries.green[i]; |
1191 | |
1192 | if (dc_fixpt_lt(ramp->entries.blue[i], min)) |
1193 | min = ramp->entries.blue[i]; |
1194 | |
1195 | if (dc_fixpt_lt(max, ramp->entries.red[i])) |
1196 | max = ramp->entries.red[i]; |
1197 | |
1198 | if (dc_fixpt_lt(max, ramp->entries.green[i])) |
1199 | max = ramp->entries.green[i]; |
1200 | |
1201 | if (dc_fixpt_lt(max, ramp->entries.blue[i])) |
1202 | max = ramp->entries.blue[i]; |
1203 | } |
1204 | |
1205 | if (dc_fixpt_lt(min, dc_fixpt_zero)) |
1206 | delta = dc_fixpt_neg(min); |
1207 | |
1208 | offset = dc_fixpt_add(min, max); |
1209 | |
1210 | for (i = 0 ; i < ramp->num_entries; i++) { |
1211 | pwl_rgb[i].r = dc_fixpt_div( |
1212 | dc_fixpt_add( |
1213 | ramp->entries.red[i], delta), offset); |
1214 | pwl_rgb[i].g = dc_fixpt_div( |
1215 | dc_fixpt_add( |
1216 | ramp->entries.green[i], delta), offset); |
1217 | pwl_rgb[i].b = dc_fixpt_div( |
1218 | dc_fixpt_add( |
1219 | ramp->entries.blue[i], delta), offset); |
1220 | |
1221 | } |
1222 | |
1223 | pwl_rgb[i].r = dc_fixpt_sub(dc_fixpt_mul_int( |
1224 | pwl_rgb[i-1].r, 2), pwl_rgb[i-2].r); |
1225 | pwl_rgb[i].g = dc_fixpt_sub(dc_fixpt_mul_int( |
1226 | pwl_rgb[i-1].g, 2), pwl_rgb[i-2].g); |
1227 | pwl_rgb[i].b = dc_fixpt_sub(dc_fixpt_mul_int( |
1228 | pwl_rgb[i-1].b, 2), pwl_rgb[i-2].b); |
1229 | ++i; |
1230 | pwl_rgb[i].r = dc_fixpt_sub(dc_fixpt_mul_int( |
1231 | pwl_rgb[i-1].r, 2), pwl_rgb[i-2].r); |
1232 | pwl_rgb[i].g = dc_fixpt_sub(dc_fixpt_mul_int( |
1233 | pwl_rgb[i-1].g, 2), pwl_rgb[i-2].g); |
1234 | pwl_rgb[i].b = dc_fixpt_sub(dc_fixpt_mul_int( |
1235 | pwl_rgb[i-1].b, 2), pwl_rgb[i-2].b); |
1236 | } |
1237 | |
1238 | /* todo: all these scale_gamma functions are inherently the same but |
1239 | * take different structures as params or different format for ramp |
1240 | * values. We could probably implement it in a more generic fashion |
1241 | */ |
1242 | static void scale_user_regamma_ramp(struct pwl_float_data *pwl_rgb, |
1243 | const struct regamma_ramp *ramp, |
1244 | struct dividers dividers) |
1245 | { |
1246 | unsigned short max_driver = 0xFFFF; |
1247 | unsigned short max_os = 0xFF00; |
1248 | unsigned short scaler = max_os; |
1249 | uint32_t i; |
1250 | struct pwl_float_data *rgb = pwl_rgb; |
1251 | struct pwl_float_data *rgb_last = rgb + GAMMA_RGB_256_ENTRIES - 1; |
1252 | |
1253 | i = 0; |
1254 | do { |
1255 | if (ramp->gamma[i] > max_os || |
1256 | ramp->gamma[i + 256] > max_os || |
1257 | ramp->gamma[i + 512] > max_os) { |
1258 | scaler = max_driver; |
1259 | break; |
1260 | } |
1261 | i++; |
1262 | } while (i != GAMMA_RGB_256_ENTRIES); |
1263 | |
1264 | i = 0; |
1265 | do { |
1266 | rgb->r = dc_fixpt_from_fraction( |
1267 | ramp->gamma[i], scaler); |
1268 | rgb->g = dc_fixpt_from_fraction( |
1269 | ramp->gamma[i + 256], scaler); |
1270 | rgb->b = dc_fixpt_from_fraction( |
1271 | ramp->gamma[i + 512], scaler); |
1272 | |
1273 | ++rgb; |
1274 | ++i; |
1275 | } while (i != GAMMA_RGB_256_ENTRIES); |
1276 | |
1277 | rgb->r = dc_fixpt_mul(rgb_last->r, |
1278 | dividers.divider1); |
1279 | rgb->g = dc_fixpt_mul(rgb_last->g, |
1280 | dividers.divider1); |
1281 | rgb->b = dc_fixpt_mul(rgb_last->b, |
1282 | dividers.divider1); |
1283 | |
1284 | ++rgb; |
1285 | |
1286 | rgb->r = dc_fixpt_mul(rgb_last->r, |
1287 | dividers.divider2); |
1288 | rgb->g = dc_fixpt_mul(rgb_last->g, |
1289 | dividers.divider2); |
1290 | rgb->b = dc_fixpt_mul(rgb_last->b, |
1291 | dividers.divider2); |
1292 | |
1293 | ++rgb; |
1294 | |
1295 | rgb->r = dc_fixpt_mul(rgb_last->r, |
1296 | dividers.divider3); |
1297 | rgb->g = dc_fixpt_mul(rgb_last->g, |
1298 | dividers.divider3); |
1299 | rgb->b = dc_fixpt_mul(rgb_last->b, |
1300 | dividers.divider3); |
1301 | } |
1302 | |
1303 | /* |
1304 | * RS3+ color transform DDI - 1D LUT adjustment is composed with regamma here |
1305 | * Input is evenly distributed in the output color space as specified in |
1306 | * SetTimings |
1307 | * |
1308 | * Interpolation details: |
1309 | * 1D LUT has 4096 values which give curve correction in 0-1 float range |
1310 | * for evenly spaced points in 0-1 range. lut1D[index] gives correction |
1311 | * for index/4095. |
1312 | * First we find index for which: |
1313 | * index/4095 < regamma_y < (index+1)/4095 => |
1314 | * index < 4095*regamma_y < index + 1 |
1315 | * norm_y = 4095*regamma_y, and index is just truncating to nearest integer |
1316 | * lut1 = lut1D[index], lut2 = lut1D[index+1] |
1317 | * |
1318 | * adjustedY is then linearly interpolating regamma Y between lut1 and lut2 |
1319 | * |
1320 | * Custom degamma on Linux uses the same interpolation math, so is handled here |
1321 | */ |
1322 | static void apply_lut_1d( |
1323 | const struct dc_gamma *ramp, |
1324 | uint32_t num_hw_points, |
1325 | struct dc_transfer_func_distributed_points *tf_pts) |
1326 | { |
1327 | int i = 0; |
1328 | int color = 0; |
1329 | struct fixed31_32 *regamma_y; |
1330 | struct fixed31_32 norm_y; |
1331 | struct fixed31_32 lut1; |
1332 | struct fixed31_32 lut2; |
1333 | const int max_lut_index = 4095; |
1334 | const struct fixed31_32 max_lut_index_f = |
1335 | dc_fixpt_from_int(max_lut_index); |
1336 | int32_t index = 0, index_next = 0; |
1337 | struct fixed31_32 index_f; |
1338 | struct fixed31_32 delta_lut; |
1339 | struct fixed31_32 delta_index; |
1340 | |
1341 | if (ramp->type != GAMMA_CS_TFM_1D && ramp->type != GAMMA_CUSTOM) |
1342 | return; // this is not expected |
1343 | |
1344 | for (i = 0; i < num_hw_points; i++) { |
1345 | for (color = 0; color < 3; color++) { |
1346 | if (color == 0) |
1347 | regamma_y = &tf_pts->red[i]; |
1348 | else if (color == 1) |
1349 | regamma_y = &tf_pts->green[i]; |
1350 | else |
1351 | regamma_y = &tf_pts->blue[i]; |
1352 | |
1353 | norm_y = dc_fixpt_mul(max_lut_index_f, |
1354 | *regamma_y); |
1355 | index = dc_fixpt_floor(norm_y); |
1356 | index_f = dc_fixpt_from_int(index); |
1357 | |
1358 | if (index < 0 || index > max_lut_index) |
1359 | continue; |
1360 | |
1361 | index_next = (index == max_lut_index) ? index : index+1; |
1362 | |
1363 | if (color == 0) { |
1364 | lut1 = ramp->entries.red[index]; |
1365 | lut2 = ramp->entries.red[index_next]; |
1366 | } else if (color == 1) { |
1367 | lut1 = ramp->entries.green[index]; |
1368 | lut2 = ramp->entries.green[index_next]; |
1369 | } else { |
1370 | lut1 = ramp->entries.blue[index]; |
1371 | lut2 = ramp->entries.blue[index_next]; |
1372 | } |
1373 | |
1374 | // we have everything now, so interpolate |
1375 | delta_lut = dc_fixpt_sub(lut2, lut1); |
1376 | delta_index = dc_fixpt_sub(norm_y, index_f); |
1377 | |
1378 | *regamma_y = dc_fixpt_add(lut1, |
1379 | dc_fixpt_mul(delta_index, delta_lut)); |
1380 | } |
1381 | } |
1382 | } |
1383 | |
1384 | static void build_evenly_distributed_points( |
1385 | struct gamma_pixel *points, |
1386 | uint32_t numberof_points, |
1387 | struct dividers dividers) |
1388 | { |
1389 | struct gamma_pixel *p = points; |
1390 | struct gamma_pixel *p_last; |
1391 | |
1392 | uint32_t i = 0; |
1393 | |
1394 | // This function should not gets called with 0 as a parameter |
1395 | ASSERT(numberof_points > 0)do { if (({ static int __warned; int __ret = !!(!(numberof_points > 0)); if (__ret && !__warned) { printf("WARNING %s failed at %s:%d\n" , "!(numberof_points > 0)", "/usr/src/sys/dev/pci/drm/amd/display/modules/color/color_gamma.c" , 1395); __warned = 1; } __builtin_expect(!!(__ret), 0); })) do {} while (0); } while (0); |
1396 | p_last = p + numberof_points - 1; |
1397 | |
1398 | do { |
1399 | struct fixed31_32 value = dc_fixpt_from_fraction(i, |
1400 | numberof_points - 1); |
1401 | |
1402 | p->r = value; |
1403 | p->g = value; |
1404 | p->b = value; |
1405 | |
1406 | ++p; |
1407 | ++i; |
1408 | } while (i < numberof_points); |
1409 | |
1410 | p->r = dc_fixpt_div(p_last->r, dividers.divider1); |
1411 | p->g = dc_fixpt_div(p_last->g, dividers.divider1); |
1412 | p->b = dc_fixpt_div(p_last->b, dividers.divider1); |
1413 | |
1414 | ++p; |
1415 | |
1416 | p->r = dc_fixpt_div(p_last->r, dividers.divider2); |
1417 | p->g = dc_fixpt_div(p_last->g, dividers.divider2); |
1418 | p->b = dc_fixpt_div(p_last->b, dividers.divider2); |
1419 | |
1420 | ++p; |
1421 | |
1422 | p->r = dc_fixpt_div(p_last->r, dividers.divider3); |
1423 | p->g = dc_fixpt_div(p_last->g, dividers.divider3); |
1424 | p->b = dc_fixpt_div(p_last->b, dividers.divider3); |
1425 | } |
1426 | |
1427 | static inline void copy_rgb_regamma_to_coordinates_x( |
1428 | struct hw_x_point *coordinates_x, |
1429 | uint32_t hw_points_num, |
1430 | const struct pwl_float_data_ex *rgb_ex) |
1431 | { |
1432 | struct hw_x_point *coords = coordinates_x; |
1433 | uint32_t i = 0; |
1434 | const struct pwl_float_data_ex *rgb_regamma = rgb_ex; |
1435 | |
1436 | while (i <= hw_points_num + 1) { |
1437 | coords->regamma_y_red = rgb_regamma->r; |
1438 | coords->regamma_y_green = rgb_regamma->g; |
1439 | coords->regamma_y_blue = rgb_regamma->b; |
1440 | |
1441 | ++coords; |
1442 | ++rgb_regamma; |
1443 | ++i; |
1444 | } |
1445 | } |
1446 | |
1447 | static bool_Bool calculate_interpolated_hardware_curve( |
1448 | const struct dc_gamma *ramp, |
1449 | struct pixel_gamma_point *coeff128, |
1450 | struct pwl_float_data *rgb_user, |
1451 | const struct hw_x_point *coordinates_x, |
1452 | const struct gamma_pixel *axis_x, |
1453 | uint32_t number_of_points, |
1454 | struct dc_transfer_func_distributed_points *tf_pts) |
1455 | { |
1456 | |
1457 | const struct pixel_gamma_point *coeff = coeff128; |
1458 | uint32_t max_entries = 3 - 1; |
1459 | |
1460 | uint32_t i = 0; |
1461 | |
1462 | for (i = 0; i < 3; i++) { |
1463 | if (!build_custom_gamma_mapping_coefficients_worker( |
1464 | ramp, coeff128, coordinates_x, axis_x, i, |
1465 | number_of_points)) |
1466 | return false0; |
1467 | } |
1468 | |
1469 | i = 0; |
1470 | max_entries += ramp->num_entries; |
1471 | |
1472 | /* TODO: float point case */ |
1473 | |
1474 | while (i <= number_of_points) { |
1475 | tf_pts->red[i] = calculate_mapped_value( |
1476 | rgb_user, coeff, CHANNEL_NAME_RED, max_entries); |
1477 | tf_pts->green[i] = calculate_mapped_value( |
1478 | rgb_user, coeff, CHANNEL_NAME_GREEN, max_entries); |
1479 | tf_pts->blue[i] = calculate_mapped_value( |
1480 | rgb_user, coeff, CHANNEL_NAME_BLUE, max_entries); |
1481 | |
1482 | ++coeff; |
1483 | ++i; |
1484 | } |
1485 | |
1486 | return true1; |
1487 | } |
1488 | |
1489 | /* The "old" interpolation uses a complicated scheme to build an array of |
1490 | * coefficients while also using an array of 0-255 normalized to 0-1 |
1491 | * Then there's another loop using both of the above + new scaled user ramp |
1492 | * and we concatenate them. It also searches for points of interpolation and |
1493 | * uses enums for positions. |
1494 | * |
1495 | * This function uses a different approach: |
1496 | * user ramp is always applied on X with 0/255, 1/255, 2/255, ..., 255/255 |
1497 | * To find index for hwX , we notice the following: |
1498 | * i/255 <= hwX < (i+1)/255 <=> i <= 255*hwX < i+1 |
1499 | * See apply_lut_1d which is the same principle, but on 4K entry 1D LUT |
1500 | * |
1501 | * Once the index is known, combined Y is simply: |
1502 | * user_ramp(index) + (hwX-index/255)*(user_ramp(index+1) - user_ramp(index) |
1503 | * |
1504 | * We should switch to this method in all cases, it's simpler and faster |
1505 | * ToDo one day - for now this only applies to ADL regamma to avoid regression |
1506 | * for regular use cases (sRGB and PQ) |
1507 | */ |
1508 | static void interpolate_user_regamma(uint32_t hw_points_num, |
1509 | struct pwl_float_data *rgb_user, |
1510 | bool_Bool apply_degamma, |
1511 | struct dc_transfer_func_distributed_points *tf_pts) |
1512 | { |
1513 | uint32_t i; |
1514 | uint32_t color = 0; |
1515 | int32_t index; |
1516 | int32_t index_next; |
1517 | struct fixed31_32 *tf_point; |
1518 | struct fixed31_32 hw_x; |
1519 | struct fixed31_32 norm_factor = |
1520 | dc_fixpt_from_int(255); |
1521 | struct fixed31_32 norm_x; |
1522 | struct fixed31_32 index_f; |
1523 | struct fixed31_32 lut1; |
1524 | struct fixed31_32 lut2; |
1525 | struct fixed31_32 delta_lut; |
1526 | struct fixed31_32 delta_index; |
1527 | |
1528 | i = 0; |
1529 | /* fixed_pt library has problems handling too small values */ |
1530 | while (i != 32) { |
1531 | tf_pts->red[i] = dc_fixpt_zero; |
1532 | tf_pts->green[i] = dc_fixpt_zero; |
1533 | tf_pts->blue[i] = dc_fixpt_zero; |
1534 | ++i; |
1535 | } |
1536 | while (i <= hw_points_num + 1) { |
1537 | for (color = 0; color < 3; color++) { |
1538 | if (color == 0) |
1539 | tf_point = &tf_pts->red[i]; |
1540 | else if (color == 1) |
1541 | tf_point = &tf_pts->green[i]; |
1542 | else |
1543 | tf_point = &tf_pts->blue[i]; |
1544 | |
1545 | if (apply_degamma) { |
1546 | if (color == 0) |
1547 | hw_x = coordinates_x[i].regamma_y_red; |
1548 | else if (color == 1) |
1549 | hw_x = coordinates_x[i].regamma_y_green; |
1550 | else |
1551 | hw_x = coordinates_x[i].regamma_y_blue; |
1552 | } else |
1553 | hw_x = coordinates_x[i].x; |
1554 | |
1555 | norm_x = dc_fixpt_mul(norm_factor, hw_x); |
1556 | index = dc_fixpt_floor(norm_x); |
1557 | if (index < 0 || index > 255) |
1558 | continue; |
1559 | |
1560 | index_f = dc_fixpt_from_int(index); |
1561 | index_next = (index == 255) ? index : index + 1; |
1562 | |
1563 | if (color == 0) { |
1564 | lut1 = rgb_user[index].r; |
1565 | lut2 = rgb_user[index_next].r; |
1566 | } else if (color == 1) { |
1567 | lut1 = rgb_user[index].g; |
1568 | lut2 = rgb_user[index_next].g; |
1569 | } else { |
1570 | lut1 = rgb_user[index].b; |
1571 | lut2 = rgb_user[index_next].b; |
1572 | } |
1573 | |
1574 | // we have everything now, so interpolate |
1575 | delta_lut = dc_fixpt_sub(lut2, lut1); |
1576 | delta_index = dc_fixpt_sub(norm_x, index_f); |
1577 | |
1578 | *tf_point = dc_fixpt_add(lut1, |
1579 | dc_fixpt_mul(delta_index, delta_lut)); |
1580 | } |
1581 | ++i; |
1582 | } |
1583 | } |
1584 | |
1585 | static void build_new_custom_resulted_curve( |
1586 | uint32_t hw_points_num, |
1587 | struct dc_transfer_func_distributed_points *tf_pts) |
1588 | { |
1589 | uint32_t i; |
1590 | |
1591 | i = 0; |
1592 | |
1593 | while (i != hw_points_num + 1) { |
1594 | tf_pts->red[i] = dc_fixpt_clamp( |
1595 | tf_pts->red[i], dc_fixpt_zero, |
1596 | dc_fixpt_one); |
1597 | tf_pts->green[i] = dc_fixpt_clamp( |
1598 | tf_pts->green[i], dc_fixpt_zero, |
1599 | dc_fixpt_one); |
1600 | tf_pts->blue[i] = dc_fixpt_clamp( |
1601 | tf_pts->blue[i], dc_fixpt_zero, |
1602 | dc_fixpt_one); |
1603 | |
1604 | ++i; |
1605 | } |
1606 | } |
1607 | |
1608 | static void apply_degamma_for_user_regamma(struct pwl_float_data_ex *rgb_regamma, |
1609 | uint32_t hw_points_num, struct calculate_buffer *cal_buffer) |
1610 | { |
1611 | uint32_t i; |
1612 | |
1613 | struct gamma_coefficients coeff; |
1614 | struct pwl_float_data_ex *rgb = rgb_regamma; |
1615 | const struct hw_x_point *coord_x = coordinates_x; |
1616 | |
1617 | build_coefficients(&coeff, TRANSFER_FUNCTION_SRGB); |
1618 | |
1619 | i = 0; |
1620 | while (i != hw_points_num + 1) { |
1621 | rgb->r = translate_from_linear_space_ex( |
1622 | coord_x->x, &coeff, 0, cal_buffer); |
1623 | rgb->g = rgb->r; |
1624 | rgb->b = rgb->r; |
1625 | ++coord_x; |
1626 | ++rgb; |
1627 | ++i; |
1628 | } |
1629 | } |
1630 | |
1631 | static bool_Bool map_regamma_hw_to_x_user( |
1632 | const struct dc_gamma *ramp, |
1633 | struct pixel_gamma_point *coeff128, |
1634 | struct pwl_float_data *rgb_user, |
1635 | struct hw_x_point *coords_x, |
1636 | const struct gamma_pixel *axis_x, |
1637 | const struct pwl_float_data_ex *rgb_regamma, |
1638 | uint32_t hw_points_num, |
1639 | struct dc_transfer_func_distributed_points *tf_pts, |
1640 | bool_Bool mapUserRamp) |
1641 | { |
1642 | /* setup to spare calculated ideal regamma values */ |
1643 | |
1644 | int i = 0; |
1645 | struct hw_x_point *coords = coords_x; |
1646 | const struct pwl_float_data_ex *regamma = rgb_regamma; |
1647 | |
1648 | if (ramp && mapUserRamp) { |
1649 | copy_rgb_regamma_to_coordinates_x(coords, |
1650 | hw_points_num, |
1651 | rgb_regamma); |
1652 | |
1653 | calculate_interpolated_hardware_curve( |
1654 | ramp, coeff128, rgb_user, coords, axis_x, |
1655 | hw_points_num, tf_pts); |
1656 | } else { |
1657 | /* just copy current rgb_regamma into tf_pts */ |
1658 | while (i <= hw_points_num) { |
1659 | tf_pts->red[i] = regamma->r; |
1660 | tf_pts->green[i] = regamma->g; |
1661 | tf_pts->blue[i] = regamma->b; |
1662 | |
1663 | ++regamma; |
1664 | ++i; |
1665 | } |
1666 | } |
1667 | |
1668 | /* this should be named differently, all it does is clamp to 0-1 */ |
1669 | build_new_custom_resulted_curve(hw_points_num, tf_pts); |
1670 | |
1671 | return true1; |
1672 | } |
1673 | |
1674 | #define _EXTRA_POINTS3 3 |
1675 | |
1676 | bool_Bool calculate_user_regamma_coeff(struct dc_transfer_func *output_tf, |
1677 | const struct regamma_lut *regamma, |
1678 | struct calculate_buffer *cal_buffer) |
1679 | { |
1680 | struct gamma_coefficients coeff; |
1681 | const struct hw_x_point *coord_x = coordinates_x; |
1682 | uint32_t i = 0; |
1683 | |
1684 | do { |
1685 | coeff.a0[i] = dc_fixpt_from_fraction( |
1686 | regamma->coeff.A0[i], 10000000); |
1687 | coeff.a1[i] = dc_fixpt_from_fraction( |
1688 | regamma->coeff.A1[i], 1000); |
1689 | coeff.a2[i] = dc_fixpt_from_fraction( |
1690 | regamma->coeff.A2[i], 1000); |
1691 | coeff.a3[i] = dc_fixpt_from_fraction( |
1692 | regamma->coeff.A3[i], 1000); |
1693 | coeff.user_gamma[i] = dc_fixpt_from_fraction( |
1694 | regamma->coeff.gamma[i], 1000); |
1695 | |
1696 | ++i; |
1697 | } while (i != 3); |
1698 | |
1699 | i = 0; |
1700 | /* fixed_pt library has problems handling too small values */ |
1701 | while (i != 32) { |
1702 | output_tf->tf_pts.red[i] = dc_fixpt_zero; |
1703 | output_tf->tf_pts.green[i] = dc_fixpt_zero; |
1704 | output_tf->tf_pts.blue[i] = dc_fixpt_zero; |
1705 | ++coord_x; |
1706 | ++i; |
1707 | } |
1708 | while (i != MAX_HW_POINTS(16*32) + 1) { |
1709 | output_tf->tf_pts.red[i] = translate_from_linear_space_ex( |
1710 | coord_x->x, &coeff, 0, cal_buffer); |
1711 | output_tf->tf_pts.green[i] = translate_from_linear_space_ex( |
1712 | coord_x->x, &coeff, 1, cal_buffer); |
1713 | output_tf->tf_pts.blue[i] = translate_from_linear_space_ex( |
1714 | coord_x->x, &coeff, 2, cal_buffer); |
1715 | ++coord_x; |
1716 | ++i; |
1717 | } |
1718 | |
1719 | // this function just clamps output to 0-1 |
1720 | build_new_custom_resulted_curve(MAX_HW_POINTS(16*32), &output_tf->tf_pts); |
1721 | output_tf->type = TF_TYPE_DISTRIBUTED_POINTS; |
1722 | |
1723 | return true1; |
1724 | } |
1725 | |
1726 | bool_Bool calculate_user_regamma_ramp(struct dc_transfer_func *output_tf, |
1727 | const struct regamma_lut *regamma, |
1728 | struct calculate_buffer *cal_buffer) |
1729 | { |
1730 | struct dc_transfer_func_distributed_points *tf_pts = &output_tf->tf_pts; |
1731 | struct dividers dividers; |
1732 | |
1733 | struct pwl_float_data *rgb_user = NULL((void *)0); |
1734 | struct pwl_float_data_ex *rgb_regamma = NULL((void *)0); |
1735 | bool_Bool ret = false0; |
1736 | |
1737 | if (regamma == NULL((void *)0)) |
1738 | return false0; |
1739 | |
1740 | output_tf->type = TF_TYPE_DISTRIBUTED_POINTS; |
1741 | |
1742 | rgb_user = kcalloc(GAMMA_RGB_256_ENTRIES + _EXTRA_POINTS3, |
1743 | sizeof(*rgb_user), |
1744 | GFP_KERNEL(0x0001 | 0x0004)); |
1745 | if (!rgb_user) |
1746 | goto rgb_user_alloc_fail; |
1747 | |
1748 | rgb_regamma = kcalloc(MAX_HW_POINTS(16*32) + _EXTRA_POINTS3, |
1749 | sizeof(*rgb_regamma), |
1750 | GFP_KERNEL(0x0001 | 0x0004)); |
1751 | if (!rgb_regamma) |
1752 | goto rgb_regamma_alloc_fail; |
1753 | |
1754 | dividers.divider1 = dc_fixpt_from_fraction(3, 2); |
1755 | dividers.divider2 = dc_fixpt_from_int(2); |
1756 | dividers.divider3 = dc_fixpt_from_fraction(5, 2); |
1757 | |
1758 | scale_user_regamma_ramp(rgb_user, ®amma->ramp, dividers); |
1759 | |
1760 | if (regamma->flags.bits.applyDegamma == 1) { |
1761 | apply_degamma_for_user_regamma(rgb_regamma, MAX_HW_POINTS(16*32), cal_buffer); |
1762 | copy_rgb_regamma_to_coordinates_x(coordinates_x, |
1763 | MAX_HW_POINTS(16*32), rgb_regamma); |
1764 | } |
1765 | |
1766 | interpolate_user_regamma(MAX_HW_POINTS(16*32), rgb_user, |
1767 | regamma->flags.bits.applyDegamma, tf_pts); |
1768 | |
1769 | // no custom HDR curves! |
1770 | tf_pts->end_exponent = 0; |
1771 | tf_pts->x_point_at_y1_red = 1; |
1772 | tf_pts->x_point_at_y1_green = 1; |
1773 | tf_pts->x_point_at_y1_blue = 1; |
1774 | |
1775 | // this function just clamps output to 0-1 |
1776 | build_new_custom_resulted_curve(MAX_HW_POINTS(16*32), tf_pts); |
1777 | |
1778 | ret = true1; |
1779 | |
1780 | kfree(rgb_regamma); |
1781 | rgb_regamma_alloc_fail: |
1782 | kfree(rgb_user); |
1783 | rgb_user_alloc_fail: |
1784 | return ret; |
1785 | } |
1786 | |
1787 | bool_Bool mod_color_calculate_degamma_params(struct dc_color_caps *dc_caps, |
1788 | struct dc_transfer_func *input_tf, |
1789 | const struct dc_gamma *ramp, bool_Bool mapUserRamp) |
1790 | { |
1791 | struct dc_transfer_func_distributed_points *tf_pts = &input_tf->tf_pts; |
1792 | struct dividers dividers; |
1793 | struct pwl_float_data *rgb_user = NULL((void *)0); |
1794 | struct pwl_float_data_ex *curve = NULL((void *)0); |
1795 | struct gamma_pixel *axis_x = NULL((void *)0); |
1796 | struct pixel_gamma_point *coeff = NULL((void *)0); |
1797 | enum dc_transfer_func_predefined tf = TRANSFER_FUNCTION_SRGB; |
1798 | uint32_t i; |
1799 | bool_Bool ret = false0; |
1800 | |
1801 | if (input_tf->type == TF_TYPE_BYPASS) |
1802 | return false0; |
1803 | |
1804 | /* we can use hardcoded curve for plain SRGB TF |
1805 | * If linear, it's bypass if on user ramp |
1806 | */ |
1807 | if (input_tf->type == TF_TYPE_PREDEFINED) { |
1808 | if ((input_tf->tf == TRANSFER_FUNCTION_SRGB || |
1809 | input_tf->tf == TRANSFER_FUNCTION_LINEAR) && |
1810 | !mapUserRamp) |
1811 | return true1; |
1812 | |
1813 | if (dc_caps != NULL((void *)0) && |
1814 | dc_caps->dpp.dcn_arch == 1) { |
1815 | |
1816 | if (input_tf->tf == TRANSFER_FUNCTION_PQ && |
1817 | dc_caps->dpp.dgam_rom_caps.pq == 1) |
1818 | return true1; |
1819 | |
1820 | if (input_tf->tf == TRANSFER_FUNCTION_GAMMA22 && |
1821 | dc_caps->dpp.dgam_rom_caps.gamma2_2 == 1) |
1822 | return true1; |
1823 | |
1824 | // HLG OOTF not accounted for |
1825 | if (input_tf->tf == TRANSFER_FUNCTION_HLG && |
1826 | dc_caps->dpp.dgam_rom_caps.hlg == 1) |
1827 | return true1; |
1828 | } |
1829 | } |
1830 | |
1831 | input_tf->type = TF_TYPE_DISTRIBUTED_POINTS; |
1832 | |
1833 | if (mapUserRamp && ramp && ramp->type == GAMMA_RGB_256) { |
1834 | rgb_user = kvcalloc(ramp->num_entries + _EXTRA_POINTS3, |
1835 | sizeof(*rgb_user), |
1836 | GFP_KERNEL(0x0001 | 0x0004)); |
1837 | if (!rgb_user) |
1838 | goto rgb_user_alloc_fail; |
1839 | |
1840 | axis_x = kvcalloc(ramp->num_entries + _EXTRA_POINTS3, sizeof(*axis_x), |
1841 | GFP_KERNEL(0x0001 | 0x0004)); |
1842 | if (!axis_x) |
1843 | goto axis_x_alloc_fail; |
1844 | |
1845 | dividers.divider1 = dc_fixpt_from_fraction(3, 2); |
1846 | dividers.divider2 = dc_fixpt_from_int(2); |
1847 | dividers.divider3 = dc_fixpt_from_fraction(5, 2); |
1848 | |
1849 | build_evenly_distributed_points( |
1850 | axis_x, |
1851 | ramp->num_entries, |
1852 | dividers); |
1853 | |
1854 | scale_gamma(rgb_user, ramp, dividers); |
1855 | } |
1856 | |
1857 | curve = kvcalloc(MAX_HW_POINTS(16*32) + _EXTRA_POINTS3, sizeof(*curve), |
1858 | GFP_KERNEL(0x0001 | 0x0004)); |
1859 | if (!curve) |
1860 | goto curve_alloc_fail; |
1861 | |
1862 | coeff = kvcalloc(MAX_HW_POINTS(16*32) + _EXTRA_POINTS3, sizeof(*coeff), |
1863 | GFP_KERNEL(0x0001 | 0x0004)); |
1864 | if (!coeff) |
1865 | goto coeff_alloc_fail; |
1866 | |
1867 | tf = input_tf->tf; |
1868 | |
1869 | if (tf == TRANSFER_FUNCTION_PQ) |
1870 | build_de_pq(curve, |
1871 | MAX_HW_POINTS(16*32), |
1872 | coordinates_x); |
1873 | else if (tf == TRANSFER_FUNCTION_SRGB || |
1874 | tf == TRANSFER_FUNCTION_BT709 || |
1875 | tf == TRANSFER_FUNCTION_GAMMA22 || |
1876 | tf == TRANSFER_FUNCTION_GAMMA24 || |
1877 | tf == TRANSFER_FUNCTION_GAMMA26) |
1878 | build_degamma(curve, |
1879 | MAX_HW_POINTS(16*32), |
1880 | coordinates_x, |
1881 | tf); |
1882 | else if (tf == TRANSFER_FUNCTION_HLG) |
1883 | build_hlg_degamma(curve, |
1884 | MAX_HW_POINTS(16*32), |
1885 | coordinates_x, |
1886 | 80, 1000); |
1887 | else if (tf == TRANSFER_FUNCTION_LINEAR) { |
1888 | // just copy coordinates_x into curve |
1889 | i = 0; |
1890 | while (i != MAX_HW_POINTS(16*32) + 1) { |
1891 | curve[i].r = coordinates_x[i].x; |
1892 | curve[i].g = curve[i].r; |
1893 | curve[i].b = curve[i].r; |
1894 | i++; |
1895 | } |
1896 | } else |
1897 | goto invalid_tf_fail; |
1898 | |
1899 | tf_pts->end_exponent = 0; |
1900 | tf_pts->x_point_at_y1_red = 1; |
1901 | tf_pts->x_point_at_y1_green = 1; |
1902 | tf_pts->x_point_at_y1_blue = 1; |
1903 | |
1904 | if (input_tf->tf == TRANSFER_FUNCTION_PQ) { |
1905 | /* just copy current rgb_regamma into tf_pts */ |
1906 | struct pwl_float_data_ex *curvePt = curve; |
1907 | int i = 0; |
1908 | |
1909 | while (i <= MAX_HW_POINTS(16*32)) { |
1910 | tf_pts->red[i] = curvePt->r; |
1911 | tf_pts->green[i] = curvePt->g; |
1912 | tf_pts->blue[i] = curvePt->b; |
1913 | ++curvePt; |
1914 | ++i; |
1915 | } |
1916 | } else { |
1917 | //clamps to 0-1 |
1918 | map_regamma_hw_to_x_user(ramp, coeff, rgb_user, |
1919 | coordinates_x, axis_x, curve, |
1920 | MAX_HW_POINTS(16*32), tf_pts, |
1921 | mapUserRamp && ramp && ramp->type == GAMMA_RGB_256); |
1922 | } |
1923 | |
1924 | |
1925 | |
1926 | if (ramp && ramp->type == GAMMA_CUSTOM) |
1927 | apply_lut_1d(ramp, MAX_HW_POINTS(16*32), tf_pts); |
1928 | |
1929 | ret = true1; |
1930 | |
1931 | invalid_tf_fail: |
1932 | kvfree(coeff); |
1933 | coeff_alloc_fail: |
1934 | kvfree(curve); |
1935 | curve_alloc_fail: |
1936 | kvfree(axis_x); |
1937 | axis_x_alloc_fail: |
1938 | kvfree(rgb_user); |
1939 | rgb_user_alloc_fail: |
1940 | |
1941 | return ret; |
1942 | } |
1943 | |
1944 | static bool_Bool calculate_curve(enum dc_transfer_func_predefined trans, |
1945 | struct dc_transfer_func_distributed_points *points, |
1946 | struct pwl_float_data_ex *rgb_regamma, |
1947 | const struct freesync_hdr_tf_params *fs_params, |
1948 | uint32_t sdr_ref_white_level, |
1949 | struct calculate_buffer *cal_buffer) |
1950 | { |
1951 | uint32_t i; |
1952 | bool_Bool ret = false0; |
1953 | |
1954 | if (trans == TRANSFER_FUNCTION_UNITY || |
1955 | trans == TRANSFER_FUNCTION_LINEAR) { |
1956 | points->end_exponent = 0; |
1957 | points->x_point_at_y1_red = 1; |
1958 | points->x_point_at_y1_green = 1; |
1959 | points->x_point_at_y1_blue = 1; |
1960 | |
1961 | for (i = 0; i <= MAX_HW_POINTS(16*32) ; i++) { |
1962 | rgb_regamma[i].r = coordinates_x[i].x; |
1963 | rgb_regamma[i].g = coordinates_x[i].x; |
1964 | rgb_regamma[i].b = coordinates_x[i].x; |
1965 | } |
1966 | |
1967 | ret = true1; |
1968 | } else if (trans == TRANSFER_FUNCTION_PQ) { |
1969 | points->end_exponent = 7; |
1970 | points->x_point_at_y1_red = 125; |
1971 | points->x_point_at_y1_green = 125; |
1972 | points->x_point_at_y1_blue = 125; |
1973 | |
1974 | build_pq(rgb_regamma, |
1975 | MAX_HW_POINTS(16*32), |
1976 | coordinates_x, |
1977 | sdr_ref_white_level); |
1978 | |
1979 | ret = true1; |
1980 | } else if (trans == TRANSFER_FUNCTION_GAMMA22 && |
1981 | fs_params != NULL((void *)0) && fs_params->skip_tm == 0) { |
1982 | build_freesync_hdr(rgb_regamma, |
1983 | MAX_HW_POINTS(16*32), |
1984 | coordinates_x, |
1985 | fs_params, |
1986 | cal_buffer); |
1987 | |
1988 | ret = true1; |
1989 | } else if (trans == TRANSFER_FUNCTION_HLG) { |
1990 | points->end_exponent = 4; |
1991 | points->x_point_at_y1_red = 12; |
1992 | points->x_point_at_y1_green = 12; |
1993 | points->x_point_at_y1_blue = 12; |
1994 | |
1995 | build_hlg_regamma(rgb_regamma, |
1996 | MAX_HW_POINTS(16*32), |
1997 | coordinates_x, |
1998 | 80, 1000); |
1999 | |
2000 | ret = true1; |
2001 | } else { |
2002 | // trans == TRANSFER_FUNCTION_SRGB |
2003 | // trans == TRANSFER_FUNCTION_BT709 |
2004 | // trans == TRANSFER_FUNCTION_GAMMA22 |
2005 | // trans == TRANSFER_FUNCTION_GAMMA24 |
2006 | // trans == TRANSFER_FUNCTION_GAMMA26 |
2007 | points->end_exponent = 0; |
2008 | points->x_point_at_y1_red = 1; |
2009 | points->x_point_at_y1_green = 1; |
2010 | points->x_point_at_y1_blue = 1; |
2011 | |
2012 | build_regamma(rgb_regamma, |
2013 | MAX_HW_POINTS(16*32), |
2014 | coordinates_x, |
2015 | trans, |
2016 | cal_buffer); |
2017 | |
2018 | ret = true1; |
2019 | } |
2020 | |
2021 | return ret; |
2022 | } |
2023 | |
2024 | bool_Bool mod_color_calculate_regamma_params(struct dc_transfer_func *output_tf, |
2025 | const struct dc_gamma *ramp, bool_Bool mapUserRamp, bool_Bool canRomBeUsed, |
2026 | const struct freesync_hdr_tf_params *fs_params, |
2027 | struct calculate_buffer *cal_buffer) |
2028 | { |
2029 | struct dc_transfer_func_distributed_points *tf_pts = &output_tf->tf_pts; |
2030 | struct dividers dividers; |
2031 | |
2032 | struct pwl_float_data *rgb_user = NULL((void *)0); |
2033 | struct pwl_float_data_ex *rgb_regamma = NULL((void *)0); |
2034 | struct gamma_pixel *axis_x = NULL((void *)0); |
2035 | struct pixel_gamma_point *coeff = NULL((void *)0); |
2036 | enum dc_transfer_func_predefined tf = TRANSFER_FUNCTION_SRGB; |
2037 | bool_Bool ret = false0; |
2038 | |
2039 | if (output_tf->type == TF_TYPE_BYPASS) |
2040 | return false0; |
2041 | |
2042 | /* we can use hardcoded curve for plain SRGB TF */ |
2043 | if (output_tf->type == TF_TYPE_PREDEFINED && canRomBeUsed == true1 && |
2044 | output_tf->tf == TRANSFER_FUNCTION_SRGB) { |
2045 | if (ramp == NULL((void *)0)) |
2046 | return true1; |
2047 | if ((ramp->is_identity && ramp->type != GAMMA_CS_TFM_1D) || |
2048 | (!mapUserRamp && ramp->type == GAMMA_RGB_256)) |
2049 | return true1; |
2050 | } |
2051 | |
2052 | output_tf->type = TF_TYPE_DISTRIBUTED_POINTS; |
2053 | |
2054 | if (ramp && ramp->type != GAMMA_CS_TFM_1D && |
2055 | (mapUserRamp || ramp->type != GAMMA_RGB_256)) { |
2056 | rgb_user = kvcalloc(ramp->num_entries + _EXTRA_POINTS3, |
2057 | sizeof(*rgb_user), |
2058 | GFP_KERNEL(0x0001 | 0x0004)); |
2059 | if (!rgb_user) |
2060 | goto rgb_user_alloc_fail; |
2061 | |
2062 | axis_x = kvcalloc(ramp->num_entries + 3, sizeof(*axis_x), |
2063 | GFP_KERNEL(0x0001 | 0x0004)); |
2064 | if (!axis_x) |
2065 | goto axis_x_alloc_fail; |
2066 | |
2067 | dividers.divider1 = dc_fixpt_from_fraction(3, 2); |
2068 | dividers.divider2 = dc_fixpt_from_int(2); |
2069 | dividers.divider3 = dc_fixpt_from_fraction(5, 2); |
2070 | |
2071 | build_evenly_distributed_points( |
2072 | axis_x, |
2073 | ramp->num_entries, |
2074 | dividers); |
2075 | |
2076 | if (ramp->type == GAMMA_RGB_256 && mapUserRamp) |
2077 | scale_gamma(rgb_user, ramp, dividers); |
2078 | else if (ramp->type == GAMMA_RGB_FLOAT_1024) |
2079 | scale_gamma_dx(rgb_user, ramp, dividers); |
2080 | } |
2081 | |
2082 | rgb_regamma = kvcalloc(MAX_HW_POINTS(16*32) + _EXTRA_POINTS3, |
2083 | sizeof(*rgb_regamma), |
2084 | GFP_KERNEL(0x0001 | 0x0004)); |
2085 | if (!rgb_regamma) |
2086 | goto rgb_regamma_alloc_fail; |
2087 | |
2088 | coeff = kvcalloc(MAX_HW_POINTS(16*32) + _EXTRA_POINTS3, sizeof(*coeff), |
2089 | GFP_KERNEL(0x0001 | 0x0004)); |
2090 | if (!coeff) |
2091 | goto coeff_alloc_fail; |
2092 | |
2093 | tf = output_tf->tf; |
2094 | |
2095 | ret = calculate_curve(tf, |
2096 | tf_pts, |
2097 | rgb_regamma, |
2098 | fs_params, |
2099 | output_tf->sdr_ref_white_level, |
2100 | cal_buffer); |
2101 | |
2102 | if (ret) { |
2103 | map_regamma_hw_to_x_user(ramp, coeff, rgb_user, |
2104 | coordinates_x, axis_x, rgb_regamma, |
2105 | MAX_HW_POINTS(16*32), tf_pts, |
2106 | (mapUserRamp || (ramp && ramp->type != GAMMA_RGB_256)) && |
2107 | (ramp && ramp->type != GAMMA_CS_TFM_1D)); |
2108 | |
2109 | if (ramp && ramp->type == GAMMA_CS_TFM_1D) |
2110 | apply_lut_1d(ramp, MAX_HW_POINTS(16*32), tf_pts); |
2111 | } |
2112 | |
2113 | kvfree(coeff); |
2114 | coeff_alloc_fail: |
2115 | kvfree(rgb_regamma); |
2116 | rgb_regamma_alloc_fail: |
2117 | kvfree(axis_x); |
2118 | axis_x_alloc_fail: |
2119 | kvfree(rgb_user); |
2120 | rgb_user_alloc_fail: |
2121 | return ret; |
2122 | } |
2123 | |
2124 | bool_Bool mod_color_calculate_degamma_curve(enum dc_transfer_func_predefined trans, |
2125 | struct dc_transfer_func_distributed_points *points) |
2126 | { |
2127 | uint32_t i; |
2128 | bool_Bool ret = false0; |
2129 | struct pwl_float_data_ex *rgb_degamma = NULL((void *)0); |
2130 | |
2131 | if (trans == TRANSFER_FUNCTION_UNITY || |
2132 | trans == TRANSFER_FUNCTION_LINEAR) { |
2133 | |
2134 | for (i = 0; i <= MAX_HW_POINTS(16*32) ; i++) { |
2135 | points->red[i] = coordinates_x[i].x; |
2136 | points->green[i] = coordinates_x[i].x; |
2137 | points->blue[i] = coordinates_x[i].x; |
2138 | } |
2139 | ret = true1; |
2140 | } else if (trans == TRANSFER_FUNCTION_PQ) { |
2141 | rgb_degamma = kvcalloc(MAX_HW_POINTS(16*32) + _EXTRA_POINTS3, |
2142 | sizeof(*rgb_degamma), |
2143 | GFP_KERNEL(0x0001 | 0x0004)); |
2144 | if (!rgb_degamma) |
2145 | goto rgb_degamma_alloc_fail; |
2146 | |
2147 | |
2148 | build_de_pq(rgb_degamma, |
2149 | MAX_HW_POINTS(16*32), |
2150 | coordinates_x); |
2151 | for (i = 0; i <= MAX_HW_POINTS(16*32) ; i++) { |
2152 | points->red[i] = rgb_degamma[i].r; |
2153 | points->green[i] = rgb_degamma[i].g; |
2154 | points->blue[i] = rgb_degamma[i].b; |
2155 | } |
2156 | ret = true1; |
2157 | |
2158 | kvfree(rgb_degamma); |
2159 | } else if (trans == TRANSFER_FUNCTION_SRGB || |
2160 | trans == TRANSFER_FUNCTION_BT709 || |
2161 | trans == TRANSFER_FUNCTION_GAMMA22 || |
2162 | trans == TRANSFER_FUNCTION_GAMMA24 || |
2163 | trans == TRANSFER_FUNCTION_GAMMA26) { |
2164 | rgb_degamma = kvcalloc(MAX_HW_POINTS(16*32) + _EXTRA_POINTS3, |
2165 | sizeof(*rgb_degamma), |
2166 | GFP_KERNEL(0x0001 | 0x0004)); |
2167 | if (!rgb_degamma) |
2168 | goto rgb_degamma_alloc_fail; |
2169 | |
2170 | build_degamma(rgb_degamma, |
2171 | MAX_HW_POINTS(16*32), |
2172 | coordinates_x, |
2173 | trans); |
2174 | for (i = 0; i <= MAX_HW_POINTS(16*32) ; i++) { |
2175 | points->red[i] = rgb_degamma[i].r; |
2176 | points->green[i] = rgb_degamma[i].g; |
2177 | points->blue[i] = rgb_degamma[i].b; |
2178 | } |
2179 | ret = true1; |
2180 | |
2181 | kvfree(rgb_degamma); |
2182 | } else if (trans == TRANSFER_FUNCTION_HLG) { |
2183 | rgb_degamma = kvcalloc(MAX_HW_POINTS(16*32) + _EXTRA_POINTS3, |
2184 | sizeof(*rgb_degamma), |
2185 | GFP_KERNEL(0x0001 | 0x0004)); |
2186 | if (!rgb_degamma) |
2187 | goto rgb_degamma_alloc_fail; |
2188 | |
2189 | build_hlg_degamma(rgb_degamma, |
2190 | MAX_HW_POINTS(16*32), |
2191 | coordinates_x, |
2192 | 80, 1000); |
2193 | for (i = 0; i <= MAX_HW_POINTS(16*32) ; i++) { |
2194 | points->red[i] = rgb_degamma[i].r; |
2195 | points->green[i] = rgb_degamma[i].g; |
2196 | points->blue[i] = rgb_degamma[i].b; |
2197 | } |
2198 | ret = true1; |
2199 | kvfree(rgb_degamma); |
2200 | } |
2201 | points->end_exponent = 0; |
2202 | points->x_point_at_y1_red = 1; |
2203 | points->x_point_at_y1_green = 1; |
2204 | points->x_point_at_y1_blue = 1; |
2205 | |
2206 | rgb_degamma_alloc_fail: |
2207 | return ret; |
2208 | } |