drm/bridge/sii8620: fix display of packed pixel modes in MHL2
[muen/linux.git] / drivers / gpu / drm / atmel-hlcdc / atmel_hlcdc_plane.c
1 /*
2  * Copyright (C) 2014 Free Electrons
3  * Copyright (C) 2014 Atmel
4  *
5  * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License version 2 as published by
9  * the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
14  * more details.
15  *
16  * You should have received a copy of the GNU General Public License along with
17  * this program.  If not, see <http://www.gnu.org/licenses/>.
18  */
19
20 #include "atmel_hlcdc_dc.h"
21
22 /**
23  * Atmel HLCDC Plane state structure.
24  *
25  * @base: DRM plane state
26  * @crtc_x: x position of the plane relative to the CRTC
27  * @crtc_y: y position of the plane relative to the CRTC
28  * @crtc_w: visible width of the plane
29  * @crtc_h: visible height of the plane
30  * @src_x: x buffer position
31  * @src_y: y buffer position
32  * @src_w: buffer width
33  * @src_h: buffer height
34  * @alpha: alpha blending of the plane
35  * @disc_x: x discard position
36  * @disc_y: y discard position
37  * @disc_w: discard width
38  * @disc_h: discard height
39  * @bpp: bytes per pixel deduced from pixel_format
40  * @offsets: offsets to apply to the GEM buffers
41  * @xstride: value to add to the pixel pointer between each line
42  * @pstride: value to add to the pixel pointer between each pixel
43  * @nplanes: number of planes (deduced from pixel_format)
44  * @dscrs: DMA descriptors
45  */
46 struct atmel_hlcdc_plane_state {
47         struct drm_plane_state base;
48         int crtc_x;
49         int crtc_y;
50         unsigned int crtc_w;
51         unsigned int crtc_h;
52         uint32_t src_x;
53         uint32_t src_y;
54         uint32_t src_w;
55         uint32_t src_h;
56
57         u8 alpha;
58
59         int disc_x;
60         int disc_y;
61         int disc_w;
62         int disc_h;
63
64         int ahb_id;
65
66         /* These fields are private and should not be touched */
67         int bpp[ATMEL_HLCDC_LAYER_MAX_PLANES];
68         unsigned int offsets[ATMEL_HLCDC_LAYER_MAX_PLANES];
69         int xstride[ATMEL_HLCDC_LAYER_MAX_PLANES];
70         int pstride[ATMEL_HLCDC_LAYER_MAX_PLANES];
71         int nplanes;
72
73         /* DMA descriptors. */
74         struct atmel_hlcdc_dma_channel_dscr *dscrs[ATMEL_HLCDC_LAYER_MAX_PLANES];
75 };
76
77 static inline struct atmel_hlcdc_plane_state *
78 drm_plane_state_to_atmel_hlcdc_plane_state(struct drm_plane_state *s)
79 {
80         return container_of(s, struct atmel_hlcdc_plane_state, base);
81 }
82
83 #define SUBPIXEL_MASK                   0xffff
84
85 static uint32_t rgb_formats[] = {
86         DRM_FORMAT_C8,
87         DRM_FORMAT_XRGB4444,
88         DRM_FORMAT_ARGB4444,
89         DRM_FORMAT_RGBA4444,
90         DRM_FORMAT_ARGB1555,
91         DRM_FORMAT_RGB565,
92         DRM_FORMAT_RGB888,
93         DRM_FORMAT_XRGB8888,
94         DRM_FORMAT_ARGB8888,
95         DRM_FORMAT_RGBA8888,
96 };
97
98 struct atmel_hlcdc_formats atmel_hlcdc_plane_rgb_formats = {
99         .formats = rgb_formats,
100         .nformats = ARRAY_SIZE(rgb_formats),
101 };
102
103 static uint32_t rgb_and_yuv_formats[] = {
104         DRM_FORMAT_C8,
105         DRM_FORMAT_XRGB4444,
106         DRM_FORMAT_ARGB4444,
107         DRM_FORMAT_RGBA4444,
108         DRM_FORMAT_ARGB1555,
109         DRM_FORMAT_RGB565,
110         DRM_FORMAT_RGB888,
111         DRM_FORMAT_XRGB8888,
112         DRM_FORMAT_ARGB8888,
113         DRM_FORMAT_RGBA8888,
114         DRM_FORMAT_AYUV,
115         DRM_FORMAT_YUYV,
116         DRM_FORMAT_UYVY,
117         DRM_FORMAT_YVYU,
118         DRM_FORMAT_VYUY,
119         DRM_FORMAT_NV21,
120         DRM_FORMAT_NV61,
121         DRM_FORMAT_YUV422,
122         DRM_FORMAT_YUV420,
123 };
124
125 struct atmel_hlcdc_formats atmel_hlcdc_plane_rgb_and_yuv_formats = {
126         .formats = rgb_and_yuv_formats,
127         .nformats = ARRAY_SIZE(rgb_and_yuv_formats),
128 };
129
130 static int atmel_hlcdc_format_to_plane_mode(u32 format, u32 *mode)
131 {
132         switch (format) {
133         case DRM_FORMAT_C8:
134                 *mode = ATMEL_HLCDC_C8_MODE;
135                 break;
136         case DRM_FORMAT_XRGB4444:
137                 *mode = ATMEL_HLCDC_XRGB4444_MODE;
138                 break;
139         case DRM_FORMAT_ARGB4444:
140                 *mode = ATMEL_HLCDC_ARGB4444_MODE;
141                 break;
142         case DRM_FORMAT_RGBA4444:
143                 *mode = ATMEL_HLCDC_RGBA4444_MODE;
144                 break;
145         case DRM_FORMAT_RGB565:
146                 *mode = ATMEL_HLCDC_RGB565_MODE;
147                 break;
148         case DRM_FORMAT_RGB888:
149                 *mode = ATMEL_HLCDC_RGB888_MODE;
150                 break;
151         case DRM_FORMAT_ARGB1555:
152                 *mode = ATMEL_HLCDC_ARGB1555_MODE;
153                 break;
154         case DRM_FORMAT_XRGB8888:
155                 *mode = ATMEL_HLCDC_XRGB8888_MODE;
156                 break;
157         case DRM_FORMAT_ARGB8888:
158                 *mode = ATMEL_HLCDC_ARGB8888_MODE;
159                 break;
160         case DRM_FORMAT_RGBA8888:
161                 *mode = ATMEL_HLCDC_RGBA8888_MODE;
162                 break;
163         case DRM_FORMAT_AYUV:
164                 *mode = ATMEL_HLCDC_AYUV_MODE;
165                 break;
166         case DRM_FORMAT_YUYV:
167                 *mode = ATMEL_HLCDC_YUYV_MODE;
168                 break;
169         case DRM_FORMAT_UYVY:
170                 *mode = ATMEL_HLCDC_UYVY_MODE;
171                 break;
172         case DRM_FORMAT_YVYU:
173                 *mode = ATMEL_HLCDC_YVYU_MODE;
174                 break;
175         case DRM_FORMAT_VYUY:
176                 *mode = ATMEL_HLCDC_VYUY_MODE;
177                 break;
178         case DRM_FORMAT_NV21:
179                 *mode = ATMEL_HLCDC_NV21_MODE;
180                 break;
181         case DRM_FORMAT_NV61:
182                 *mode = ATMEL_HLCDC_NV61_MODE;
183                 break;
184         case DRM_FORMAT_YUV420:
185                 *mode = ATMEL_HLCDC_YUV420_MODE;
186                 break;
187         case DRM_FORMAT_YUV422:
188                 *mode = ATMEL_HLCDC_YUV422_MODE;
189                 break;
190         default:
191                 return -ENOTSUPP;
192         }
193
194         return 0;
195 }
196
197 static u32 heo_downscaling_xcoef[] = {
198         0x11343311,
199         0x000000f7,
200         0x1635300c,
201         0x000000f9,
202         0x1b362c08,
203         0x000000fb,
204         0x1f372804,
205         0x000000fe,
206         0x24382400,
207         0x00000000,
208         0x28371ffe,
209         0x00000004,
210         0x2c361bfb,
211         0x00000008,
212         0x303516f9,
213         0x0000000c,
214 };
215
216 static u32 heo_downscaling_ycoef[] = {
217         0x00123737,
218         0x00173732,
219         0x001b382d,
220         0x001f3928,
221         0x00243824,
222         0x0028391f,
223         0x002d381b,
224         0x00323717,
225 };
226
227 static u32 heo_upscaling_xcoef[] = {
228         0xf74949f7,
229         0x00000000,
230         0xf55f33fb,
231         0x000000fe,
232         0xf5701efe,
233         0x000000ff,
234         0xf87c0dff,
235         0x00000000,
236         0x00800000,
237         0x00000000,
238         0x0d7cf800,
239         0x000000ff,
240         0x1e70f5ff,
241         0x000000fe,
242         0x335ff5fe,
243         0x000000fb,
244 };
245
246 static u32 heo_upscaling_ycoef[] = {
247         0x00004040,
248         0x00075920,
249         0x00056f0c,
250         0x00027b03,
251         0x00008000,
252         0x00037b02,
253         0x000c6f05,
254         0x00205907,
255 };
256
257 #define ATMEL_HLCDC_XPHIDEF     4
258 #define ATMEL_HLCDC_YPHIDEF     4
259
260 static u32 atmel_hlcdc_plane_phiscaler_get_factor(u32 srcsize,
261                                                   u32 dstsize,
262                                                   u32 phidef)
263 {
264         u32 factor, max_memsize;
265
266         factor = (256 * ((8 * (srcsize - 1)) - phidef)) / (dstsize - 1);
267         max_memsize = ((factor * (dstsize - 1)) + (256 * phidef)) / 2048;
268
269         if (max_memsize > srcsize - 1)
270                 factor--;
271
272         return factor;
273 }
274
275 static void
276 atmel_hlcdc_plane_scaler_set_phicoeff(struct atmel_hlcdc_plane *plane,
277                                       const u32 *coeff_tab, int size,
278                                       unsigned int cfg_offs)
279 {
280         int i;
281
282         for (i = 0; i < size; i++)
283                 atmel_hlcdc_layer_write_cfg(&plane->layer, cfg_offs + i,
284                                             coeff_tab[i]);
285 }
286
287 void atmel_hlcdc_plane_setup_scaler(struct atmel_hlcdc_plane *plane,
288                                     struct atmel_hlcdc_plane_state *state)
289 {
290         const struct atmel_hlcdc_layer_desc *desc = plane->layer.desc;
291         u32 xfactor, yfactor;
292
293         if (!desc->layout.scaler_config)
294                 return;
295
296         if (state->crtc_w == state->src_w && state->crtc_h == state->src_h) {
297                 atmel_hlcdc_layer_write_cfg(&plane->layer,
298                                             desc->layout.scaler_config, 0);
299                 return;
300         }
301
302         if (desc->layout.phicoeffs.x) {
303                 xfactor = atmel_hlcdc_plane_phiscaler_get_factor(state->src_w,
304                                                         state->crtc_w,
305                                                         ATMEL_HLCDC_XPHIDEF);
306
307                 yfactor = atmel_hlcdc_plane_phiscaler_get_factor(state->src_h,
308                                                         state->crtc_h,
309                                                         ATMEL_HLCDC_YPHIDEF);
310
311                 atmel_hlcdc_plane_scaler_set_phicoeff(plane,
312                                 state->crtc_w < state->src_w ?
313                                 heo_downscaling_xcoef :
314                                 heo_upscaling_xcoef,
315                                 ARRAY_SIZE(heo_upscaling_xcoef),
316                                 desc->layout.phicoeffs.x);
317
318                 atmel_hlcdc_plane_scaler_set_phicoeff(plane,
319                                 state->crtc_h < state->src_h ?
320                                 heo_downscaling_ycoef :
321                                 heo_upscaling_ycoef,
322                                 ARRAY_SIZE(heo_upscaling_ycoef),
323                                 desc->layout.phicoeffs.y);
324         } else {
325                 xfactor = (1024 * state->src_w) / state->crtc_w;
326                 yfactor = (1024 * state->src_h) / state->crtc_h;
327         }
328
329         atmel_hlcdc_layer_write_cfg(&plane->layer, desc->layout.scaler_config,
330                                     ATMEL_HLCDC_LAYER_SCALER_ENABLE |
331                                     ATMEL_HLCDC_LAYER_SCALER_FACTORS(xfactor,
332                                                                      yfactor));
333 }
334
335 static void
336 atmel_hlcdc_plane_update_pos_and_size(struct atmel_hlcdc_plane *plane,
337                                       struct atmel_hlcdc_plane_state *state)
338 {
339         const struct atmel_hlcdc_layer_desc *desc = plane->layer.desc;
340
341         if (desc->layout.size)
342                 atmel_hlcdc_layer_write_cfg(&plane->layer, desc->layout.size,
343                                         ATMEL_HLCDC_LAYER_SIZE(state->crtc_w,
344                                                                state->crtc_h));
345
346         if (desc->layout.memsize)
347                 atmel_hlcdc_layer_write_cfg(&plane->layer,
348                                         desc->layout.memsize,
349                                         ATMEL_HLCDC_LAYER_SIZE(state->src_w,
350                                                                state->src_h));
351
352         if (desc->layout.pos)
353                 atmel_hlcdc_layer_write_cfg(&plane->layer, desc->layout.pos,
354                                         ATMEL_HLCDC_LAYER_POS(state->crtc_x,
355                                                               state->crtc_y));
356
357         atmel_hlcdc_plane_setup_scaler(plane, state);
358 }
359
360 static void
361 atmel_hlcdc_plane_update_general_settings(struct atmel_hlcdc_plane *plane,
362                                         struct atmel_hlcdc_plane_state *state)
363 {
364         unsigned int cfg = ATMEL_HLCDC_LAYER_DMA_BLEN_INCR16 | state->ahb_id;
365         const struct atmel_hlcdc_layer_desc *desc = plane->layer.desc;
366         const struct drm_format_info *format = state->base.fb->format;
367
368         /*
369          * Rotation optimization is not working on RGB888 (rotation is still
370          * working but without any optimization).
371          */
372         if (format->format == DRM_FORMAT_RGB888)
373                 cfg |= ATMEL_HLCDC_LAYER_DMA_ROTDIS;
374
375         atmel_hlcdc_layer_write_cfg(&plane->layer, ATMEL_HLCDC_LAYER_DMA_CFG,
376                                     cfg);
377
378         cfg = ATMEL_HLCDC_LAYER_DMA;
379
380         if (plane->base.type != DRM_PLANE_TYPE_PRIMARY) {
381                 cfg |= ATMEL_HLCDC_LAYER_OVR | ATMEL_HLCDC_LAYER_ITER2BL |
382                        ATMEL_HLCDC_LAYER_ITER;
383
384                 if (format->has_alpha)
385                         cfg |= ATMEL_HLCDC_LAYER_LAEN;
386                 else
387                         cfg |= ATMEL_HLCDC_LAYER_GAEN |
388                                ATMEL_HLCDC_LAYER_GA(state->alpha);
389         }
390
391         if (state->disc_h && state->disc_w)
392                 cfg |= ATMEL_HLCDC_LAYER_DISCEN;
393
394         atmel_hlcdc_layer_write_cfg(&plane->layer, desc->layout.general_config,
395                                     cfg);
396 }
397
398 static void atmel_hlcdc_plane_update_format(struct atmel_hlcdc_plane *plane,
399                                         struct atmel_hlcdc_plane_state *state)
400 {
401         u32 cfg;
402         int ret;
403
404         ret = atmel_hlcdc_format_to_plane_mode(state->base.fb->format->format,
405                                                &cfg);
406         if (ret)
407                 return;
408
409         if ((state->base.fb->format->format == DRM_FORMAT_YUV422 ||
410              state->base.fb->format->format == DRM_FORMAT_NV61) &&
411             drm_rotation_90_or_270(state->base.rotation))
412                 cfg |= ATMEL_HLCDC_YUV422ROT;
413
414         atmel_hlcdc_layer_write_cfg(&plane->layer,
415                                     ATMEL_HLCDC_LAYER_FORMAT_CFG, cfg);
416 }
417
418 static void atmel_hlcdc_plane_update_clut(struct atmel_hlcdc_plane *plane)
419 {
420         struct drm_crtc *crtc = plane->base.crtc;
421         struct drm_color_lut *lut;
422         int idx;
423
424         if (!crtc || !crtc->state)
425                 return;
426
427         if (!crtc->state->color_mgmt_changed || !crtc->state->gamma_lut)
428                 return;
429
430         lut = (struct drm_color_lut *)crtc->state->gamma_lut->data;
431
432         for (idx = 0; idx < ATMEL_HLCDC_CLUT_SIZE; idx++, lut++) {
433                 u32 val = ((lut->red << 8) & 0xff0000) |
434                         (lut->green & 0xff00) |
435                         (lut->blue >> 8);
436
437                 atmel_hlcdc_layer_write_clut(&plane->layer, idx, val);
438         }
439 }
440
441 static void atmel_hlcdc_plane_update_buffers(struct atmel_hlcdc_plane *plane,
442                                         struct atmel_hlcdc_plane_state *state)
443 {
444         const struct atmel_hlcdc_layer_desc *desc = plane->layer.desc;
445         struct drm_framebuffer *fb = state->base.fb;
446         u32 sr;
447         int i;
448
449         sr = atmel_hlcdc_layer_read_reg(&plane->layer, ATMEL_HLCDC_LAYER_CHSR);
450
451         for (i = 0; i < state->nplanes; i++) {
452                 struct drm_gem_cma_object *gem = drm_fb_cma_get_gem_obj(fb, i);
453
454                 state->dscrs[i]->addr = gem->paddr + state->offsets[i];
455
456                 atmel_hlcdc_layer_write_reg(&plane->layer,
457                                             ATMEL_HLCDC_LAYER_PLANE_HEAD(i),
458                                             state->dscrs[i]->self);
459
460                 if (!(sr & ATMEL_HLCDC_LAYER_EN)) {
461                         atmel_hlcdc_layer_write_reg(&plane->layer,
462                                         ATMEL_HLCDC_LAYER_PLANE_ADDR(i),
463                                         state->dscrs[i]->addr);
464                         atmel_hlcdc_layer_write_reg(&plane->layer,
465                                         ATMEL_HLCDC_LAYER_PLANE_CTRL(i),
466                                         state->dscrs[i]->ctrl);
467                         atmel_hlcdc_layer_write_reg(&plane->layer,
468                                         ATMEL_HLCDC_LAYER_PLANE_NEXT(i),
469                                         state->dscrs[i]->self);
470                 }
471
472                 if (desc->layout.xstride[i])
473                         atmel_hlcdc_layer_write_cfg(&plane->layer,
474                                                     desc->layout.xstride[i],
475                                                     state->xstride[i]);
476
477                 if (desc->layout.pstride[i])
478                         atmel_hlcdc_layer_write_cfg(&plane->layer,
479                                                     desc->layout.pstride[i],
480                                                     state->pstride[i]);
481         }
482 }
483
484 int atmel_hlcdc_plane_prepare_ahb_routing(struct drm_crtc_state *c_state)
485 {
486         unsigned int ahb_load[2] = { };
487         struct drm_plane *plane;
488
489         drm_atomic_crtc_state_for_each_plane(plane, c_state) {
490                 struct atmel_hlcdc_plane_state *plane_state;
491                 struct drm_plane_state *plane_s;
492                 unsigned int pixels, load = 0;
493                 int i;
494
495                 plane_s = drm_atomic_get_plane_state(c_state->state, plane);
496                 if (IS_ERR(plane_s))
497                         return PTR_ERR(plane_s);
498
499                 plane_state =
500                         drm_plane_state_to_atmel_hlcdc_plane_state(plane_s);
501
502                 pixels = (plane_state->src_w * plane_state->src_h) -
503                          (plane_state->disc_w * plane_state->disc_h);
504
505                 for (i = 0; i < plane_state->nplanes; i++)
506                         load += pixels * plane_state->bpp[i];
507
508                 if (ahb_load[0] <= ahb_load[1])
509                         plane_state->ahb_id = 0;
510                 else
511                         plane_state->ahb_id = 1;
512
513                 ahb_load[plane_state->ahb_id] += load;
514         }
515
516         return 0;
517 }
518
519 int
520 atmel_hlcdc_plane_prepare_disc_area(struct drm_crtc_state *c_state)
521 {
522         int disc_x = 0, disc_y = 0, disc_w = 0, disc_h = 0;
523         const struct atmel_hlcdc_layer_cfg_layout *layout;
524         struct atmel_hlcdc_plane_state *primary_state;
525         struct drm_plane_state *primary_s;
526         struct atmel_hlcdc_plane *primary;
527         struct drm_plane *ovl;
528
529         primary = drm_plane_to_atmel_hlcdc_plane(c_state->crtc->primary);
530         layout = &primary->layer.desc->layout;
531         if (!layout->disc_pos || !layout->disc_size)
532                 return 0;
533
534         primary_s = drm_atomic_get_plane_state(c_state->state,
535                                                &primary->base);
536         if (IS_ERR(primary_s))
537                 return PTR_ERR(primary_s);
538
539         primary_state = drm_plane_state_to_atmel_hlcdc_plane_state(primary_s);
540
541         drm_atomic_crtc_state_for_each_plane(ovl, c_state) {
542                 struct atmel_hlcdc_plane_state *ovl_state;
543                 struct drm_plane_state *ovl_s;
544
545                 if (ovl == c_state->crtc->primary)
546                         continue;
547
548                 ovl_s = drm_atomic_get_plane_state(c_state->state, ovl);
549                 if (IS_ERR(ovl_s))
550                         return PTR_ERR(ovl_s);
551
552                 ovl_state = drm_plane_state_to_atmel_hlcdc_plane_state(ovl_s);
553
554                 if (!ovl_s->fb ||
555                     ovl_s->fb->format->has_alpha ||
556                     ovl_state->alpha != 255)
557                         continue;
558
559                 /* TODO: implement a smarter hidden area detection */
560                 if (ovl_state->crtc_h * ovl_state->crtc_w < disc_h * disc_w)
561                         continue;
562
563                 disc_x = ovl_state->crtc_x;
564                 disc_y = ovl_state->crtc_y;
565                 disc_h = ovl_state->crtc_h;
566                 disc_w = ovl_state->crtc_w;
567         }
568
569         primary_state->disc_x = disc_x;
570         primary_state->disc_y = disc_y;
571         primary_state->disc_w = disc_w;
572         primary_state->disc_h = disc_h;
573
574         return 0;
575 }
576
577 static void
578 atmel_hlcdc_plane_update_disc_area(struct atmel_hlcdc_plane *plane,
579                                    struct atmel_hlcdc_plane_state *state)
580 {
581         const struct atmel_hlcdc_layer_cfg_layout *layout;
582
583         layout = &plane->layer.desc->layout;
584         if (!layout->disc_pos || !layout->disc_size)
585                 return;
586
587         atmel_hlcdc_layer_write_cfg(&plane->layer, layout->disc_pos,
588                                 ATMEL_HLCDC_LAYER_DISC_POS(state->disc_x,
589                                                            state->disc_y));
590
591         atmel_hlcdc_layer_write_cfg(&plane->layer, layout->disc_size,
592                                 ATMEL_HLCDC_LAYER_DISC_SIZE(state->disc_w,
593                                                             state->disc_h));
594 }
595
596 static int atmel_hlcdc_plane_atomic_check(struct drm_plane *p,
597                                           struct drm_plane_state *s)
598 {
599         struct atmel_hlcdc_plane *plane = drm_plane_to_atmel_hlcdc_plane(p);
600         struct atmel_hlcdc_plane_state *state =
601                                 drm_plane_state_to_atmel_hlcdc_plane_state(s);
602         const struct atmel_hlcdc_layer_desc *desc = plane->layer.desc;
603         struct drm_framebuffer *fb = state->base.fb;
604         const struct drm_display_mode *mode;
605         struct drm_crtc_state *crtc_state;
606         unsigned int patched_crtc_w;
607         unsigned int patched_crtc_h;
608         unsigned int patched_src_w;
609         unsigned int patched_src_h;
610         unsigned int tmp;
611         int x_offset = 0;
612         int y_offset = 0;
613         int hsub = 1;
614         int vsub = 1;
615         int i;
616
617         if (!state->base.crtc || !fb)
618                 return 0;
619
620         crtc_state = drm_atomic_get_existing_crtc_state(s->state, s->crtc);
621         mode = &crtc_state->adjusted_mode;
622
623         state->src_x = s->src_x;
624         state->src_y = s->src_y;
625         state->src_h = s->src_h;
626         state->src_w = s->src_w;
627         state->crtc_x = s->crtc_x;
628         state->crtc_y = s->crtc_y;
629         state->crtc_h = s->crtc_h;
630         state->crtc_w = s->crtc_w;
631         if ((state->src_x | state->src_y | state->src_w | state->src_h) &
632             SUBPIXEL_MASK)
633                 return -EINVAL;
634
635         state->src_x >>= 16;
636         state->src_y >>= 16;
637         state->src_w >>= 16;
638         state->src_h >>= 16;
639
640         state->nplanes = fb->format->num_planes;
641         if (state->nplanes > ATMEL_HLCDC_LAYER_MAX_PLANES)
642                 return -EINVAL;
643
644         /*
645          * Swap width and size in case of 90 or 270 degrees rotation
646          */
647         if (drm_rotation_90_or_270(state->base.rotation)) {
648                 tmp = state->crtc_w;
649                 state->crtc_w = state->crtc_h;
650                 state->crtc_h = tmp;
651                 tmp = state->src_w;
652                 state->src_w = state->src_h;
653                 state->src_h = tmp;
654         }
655
656         if (state->crtc_x + state->crtc_w > mode->hdisplay)
657                 patched_crtc_w = mode->hdisplay - state->crtc_x;
658         else
659                 patched_crtc_w = state->crtc_w;
660
661         if (state->crtc_x < 0) {
662                 patched_crtc_w += state->crtc_x;
663                 x_offset = -state->crtc_x;
664                 state->crtc_x = 0;
665         }
666
667         if (state->crtc_y + state->crtc_h > mode->vdisplay)
668                 patched_crtc_h = mode->vdisplay - state->crtc_y;
669         else
670                 patched_crtc_h = state->crtc_h;
671
672         if (state->crtc_y < 0) {
673                 patched_crtc_h += state->crtc_y;
674                 y_offset = -state->crtc_y;
675                 state->crtc_y = 0;
676         }
677
678         patched_src_w = DIV_ROUND_CLOSEST(patched_crtc_w * state->src_w,
679                                           state->crtc_w);
680         patched_src_h = DIV_ROUND_CLOSEST(patched_crtc_h * state->src_h,
681                                           state->crtc_h);
682
683         hsub = drm_format_horz_chroma_subsampling(fb->format->format);
684         vsub = drm_format_vert_chroma_subsampling(fb->format->format);
685
686         for (i = 0; i < state->nplanes; i++) {
687                 unsigned int offset = 0;
688                 int xdiv = i ? hsub : 1;
689                 int ydiv = i ? vsub : 1;
690
691                 state->bpp[i] = fb->format->cpp[i];
692                 if (!state->bpp[i])
693                         return -EINVAL;
694
695                 switch (state->base.rotation & DRM_MODE_ROTATE_MASK) {
696                 case DRM_MODE_ROTATE_90:
697                         offset = ((y_offset + state->src_y + patched_src_w - 1) /
698                                   ydiv) * fb->pitches[i];
699                         offset += ((x_offset + state->src_x) / xdiv) *
700                                   state->bpp[i];
701                         state->xstride[i] = ((patched_src_w - 1) / ydiv) *
702                                           fb->pitches[i];
703                         state->pstride[i] = -fb->pitches[i] - state->bpp[i];
704                         break;
705                 case DRM_MODE_ROTATE_180:
706                         offset = ((y_offset + state->src_y + patched_src_h - 1) /
707                                   ydiv) * fb->pitches[i];
708                         offset += ((x_offset + state->src_x + patched_src_w - 1) /
709                                    xdiv) * state->bpp[i];
710                         state->xstride[i] = ((((patched_src_w - 1) / xdiv) - 1) *
711                                            state->bpp[i]) - fb->pitches[i];
712                         state->pstride[i] = -2 * state->bpp[i];
713                         break;
714                 case DRM_MODE_ROTATE_270:
715                         offset = ((y_offset + state->src_y) / ydiv) *
716                                  fb->pitches[i];
717                         offset += ((x_offset + state->src_x + patched_src_h - 1) /
718                                    xdiv) * state->bpp[i];
719                         state->xstride[i] = -(((patched_src_w - 1) / ydiv) *
720                                             fb->pitches[i]) -
721                                           (2 * state->bpp[i]);
722                         state->pstride[i] = fb->pitches[i] - state->bpp[i];
723                         break;
724                 case DRM_MODE_ROTATE_0:
725                 default:
726                         offset = ((y_offset + state->src_y) / ydiv) *
727                                  fb->pitches[i];
728                         offset += ((x_offset + state->src_x) / xdiv) *
729                                   state->bpp[i];
730                         state->xstride[i] = fb->pitches[i] -
731                                           ((patched_src_w / xdiv) *
732                                            state->bpp[i]);
733                         state->pstride[i] = 0;
734                         break;
735                 }
736
737                 state->offsets[i] = offset + fb->offsets[i];
738         }
739
740         state->src_w = patched_src_w;
741         state->src_h = patched_src_h;
742         state->crtc_w = patched_crtc_w;
743         state->crtc_h = patched_crtc_h;
744
745         if (!desc->layout.size &&
746             (mode->hdisplay != state->crtc_w ||
747              mode->vdisplay != state->crtc_h))
748                 return -EINVAL;
749
750         if (desc->max_height && state->crtc_h > desc->max_height)
751                 return -EINVAL;
752
753         if (desc->max_width && state->crtc_w > desc->max_width)
754                 return -EINVAL;
755
756         if ((state->crtc_h != state->src_h || state->crtc_w != state->src_w) &&
757             (!desc->layout.memsize ||
758              state->base.fb->format->has_alpha))
759                 return -EINVAL;
760
761         if (state->crtc_x < 0 || state->crtc_y < 0)
762                 return -EINVAL;
763
764         if (state->crtc_w + state->crtc_x > mode->hdisplay ||
765             state->crtc_h + state->crtc_y > mode->vdisplay)
766                 return -EINVAL;
767
768         return 0;
769 }
770
771 static void atmel_hlcdc_plane_atomic_update(struct drm_plane *p,
772                                             struct drm_plane_state *old_s)
773 {
774         struct atmel_hlcdc_plane *plane = drm_plane_to_atmel_hlcdc_plane(p);
775         struct atmel_hlcdc_plane_state *state =
776                         drm_plane_state_to_atmel_hlcdc_plane_state(p->state);
777         u32 sr;
778
779         if (!p->state->crtc || !p->state->fb)
780                 return;
781
782         atmel_hlcdc_plane_update_pos_and_size(plane, state);
783         atmel_hlcdc_plane_update_general_settings(plane, state);
784         atmel_hlcdc_plane_update_format(plane, state);
785         atmel_hlcdc_plane_update_clut(plane);
786         atmel_hlcdc_plane_update_buffers(plane, state);
787         atmel_hlcdc_plane_update_disc_area(plane, state);
788
789         /* Enable the overrun interrupts. */
790         atmel_hlcdc_layer_write_reg(&plane->layer, ATMEL_HLCDC_LAYER_IER,
791                                     ATMEL_HLCDC_LAYER_OVR_IRQ(0) |
792                                     ATMEL_HLCDC_LAYER_OVR_IRQ(1) |
793                                     ATMEL_HLCDC_LAYER_OVR_IRQ(2));
794
795         /* Apply the new config at the next SOF event. */
796         sr = atmel_hlcdc_layer_read_reg(&plane->layer, ATMEL_HLCDC_LAYER_CHSR);
797         atmel_hlcdc_layer_write_reg(&plane->layer, ATMEL_HLCDC_LAYER_CHER,
798                         ATMEL_HLCDC_LAYER_UPDATE |
799                         (sr & ATMEL_HLCDC_LAYER_EN ?
800                          ATMEL_HLCDC_LAYER_A2Q : ATMEL_HLCDC_LAYER_EN));
801 }
802
803 static void atmel_hlcdc_plane_atomic_disable(struct drm_plane *p,
804                                              struct drm_plane_state *old_state)
805 {
806         struct atmel_hlcdc_plane *plane = drm_plane_to_atmel_hlcdc_plane(p);
807
808         /* Disable interrupts */
809         atmel_hlcdc_layer_write_reg(&plane->layer, ATMEL_HLCDC_LAYER_IDR,
810                                     0xffffffff);
811
812         /* Disable the layer */
813         atmel_hlcdc_layer_write_reg(&plane->layer, ATMEL_HLCDC_LAYER_CHDR,
814                                     ATMEL_HLCDC_LAYER_RST |
815                                     ATMEL_HLCDC_LAYER_A2Q |
816                                     ATMEL_HLCDC_LAYER_UPDATE);
817
818         /* Clear all pending interrupts */
819         atmel_hlcdc_layer_read_reg(&plane->layer, ATMEL_HLCDC_LAYER_ISR);
820 }
821
822 static void atmel_hlcdc_plane_destroy(struct drm_plane *p)
823 {
824         struct atmel_hlcdc_plane *plane = drm_plane_to_atmel_hlcdc_plane(p);
825
826         if (plane->base.fb)
827                 drm_framebuffer_put(plane->base.fb);
828
829         drm_plane_cleanup(p);
830 }
831
832 static int atmel_hlcdc_plane_atomic_set_property(struct drm_plane *p,
833                                                  struct drm_plane_state *s,
834                                                  struct drm_property *property,
835                                                  uint64_t val)
836 {
837         struct atmel_hlcdc_plane *plane = drm_plane_to_atmel_hlcdc_plane(p);
838         struct atmel_hlcdc_plane_properties *props = plane->properties;
839         struct atmel_hlcdc_plane_state *state =
840                         drm_plane_state_to_atmel_hlcdc_plane_state(s);
841
842         if (property == props->alpha)
843                 state->alpha = val;
844         else
845                 return -EINVAL;
846
847         return 0;
848 }
849
850 static int atmel_hlcdc_plane_atomic_get_property(struct drm_plane *p,
851                                         const struct drm_plane_state *s,
852                                         struct drm_property *property,
853                                         uint64_t *val)
854 {
855         struct atmel_hlcdc_plane *plane = drm_plane_to_atmel_hlcdc_plane(p);
856         struct atmel_hlcdc_plane_properties *props = plane->properties;
857         const struct atmel_hlcdc_plane_state *state =
858                 container_of(s, const struct atmel_hlcdc_plane_state, base);
859
860         if (property == props->alpha)
861                 *val = state->alpha;
862         else
863                 return -EINVAL;
864
865         return 0;
866 }
867
868 static int atmel_hlcdc_plane_init_properties(struct atmel_hlcdc_plane *plane,
869                                 struct atmel_hlcdc_plane_properties *props)
870 {
871         const struct atmel_hlcdc_layer_desc *desc = plane->layer.desc;
872
873         if (desc->type == ATMEL_HLCDC_OVERLAY_LAYER ||
874             desc->type == ATMEL_HLCDC_CURSOR_LAYER)
875                 drm_object_attach_property(&plane->base.base,
876                                            props->alpha, 255);
877
878         if (desc->layout.xstride[0] && desc->layout.pstride[0]) {
879                 int ret;
880
881                 ret = drm_plane_create_rotation_property(&plane->base,
882                                                          DRM_MODE_ROTATE_0,
883                                                          DRM_MODE_ROTATE_0 |
884                                                          DRM_MODE_ROTATE_90 |
885                                                          DRM_MODE_ROTATE_180 |
886                                                          DRM_MODE_ROTATE_270);
887                 if (ret)
888                         return ret;
889         }
890
891         if (desc->layout.csc) {
892                 /*
893                  * TODO: decare a "yuv-to-rgb-conv-factors" property to let
894                  * userspace modify these factors (using a BLOB property ?).
895                  */
896                 atmel_hlcdc_layer_write_cfg(&plane->layer,
897                                             desc->layout.csc,
898                                             0x4c900091);
899                 atmel_hlcdc_layer_write_cfg(&plane->layer,
900                                             desc->layout.csc + 1,
901                                             0x7a5f5090);
902                 atmel_hlcdc_layer_write_cfg(&plane->layer,
903                                             desc->layout.csc + 2,
904                                             0x40040890);
905         }
906
907         return 0;
908 }
909
910 void atmel_hlcdc_plane_irq(struct atmel_hlcdc_plane *plane)
911 {
912         const struct atmel_hlcdc_layer_desc *desc = plane->layer.desc;
913         u32 isr;
914
915         isr = atmel_hlcdc_layer_read_reg(&plane->layer, ATMEL_HLCDC_LAYER_ISR);
916
917         /*
918          * There's not much we can do in case of overrun except informing
919          * the user. However, we are in interrupt context here, hence the
920          * use of dev_dbg().
921          */
922         if (isr &
923             (ATMEL_HLCDC_LAYER_OVR_IRQ(0) | ATMEL_HLCDC_LAYER_OVR_IRQ(1) |
924              ATMEL_HLCDC_LAYER_OVR_IRQ(2)))
925                 dev_dbg(plane->base.dev->dev, "overrun on plane %s\n",
926                         desc->name);
927 }
928
929 static const struct drm_plane_helper_funcs atmel_hlcdc_layer_plane_helper_funcs = {
930         .atomic_check = atmel_hlcdc_plane_atomic_check,
931         .atomic_update = atmel_hlcdc_plane_atomic_update,
932         .atomic_disable = atmel_hlcdc_plane_atomic_disable,
933 };
934
935 static int atmel_hlcdc_plane_alloc_dscrs(struct drm_plane *p,
936                                          struct atmel_hlcdc_plane_state *state)
937 {
938         struct atmel_hlcdc_dc *dc = p->dev->dev_private;
939         int i;
940
941         for (i = 0; i < ARRAY_SIZE(state->dscrs); i++) {
942                 struct atmel_hlcdc_dma_channel_dscr *dscr;
943                 dma_addr_t dscr_dma;
944
945                 dscr = dma_pool_alloc(dc->dscrpool, GFP_KERNEL, &dscr_dma);
946                 if (!dscr)
947                         goto err;
948
949                 dscr->addr = 0;
950                 dscr->next = dscr_dma;
951                 dscr->self = dscr_dma;
952                 dscr->ctrl = ATMEL_HLCDC_LAYER_DFETCH;
953
954                 state->dscrs[i] = dscr;
955         }
956
957         return 0;
958
959 err:
960         for (i--; i >= 0; i--) {
961                 dma_pool_free(dc->dscrpool, state->dscrs[i],
962                               state->dscrs[i]->self);
963         }
964
965         return -ENOMEM;
966 }
967
968 static void atmel_hlcdc_plane_reset(struct drm_plane *p)
969 {
970         struct atmel_hlcdc_plane_state *state;
971
972         if (p->state) {
973                 state = drm_plane_state_to_atmel_hlcdc_plane_state(p->state);
974
975                 if (state->base.fb)
976                         drm_framebuffer_put(state->base.fb);
977
978                 kfree(state);
979                 p->state = NULL;
980         }
981
982         state = kzalloc(sizeof(*state), GFP_KERNEL);
983         if (state) {
984                 if (atmel_hlcdc_plane_alloc_dscrs(p, state)) {
985                         kfree(state);
986                         dev_err(p->dev->dev,
987                                 "Failed to allocate initial plane state\n");
988                         return;
989                 }
990
991                 state->alpha = 255;
992                 p->state = &state->base;
993                 p->state->plane = p;
994         }
995 }
996
997 static struct drm_plane_state *
998 atmel_hlcdc_plane_atomic_duplicate_state(struct drm_plane *p)
999 {
1000         struct atmel_hlcdc_plane_state *state =
1001                         drm_plane_state_to_atmel_hlcdc_plane_state(p->state);
1002         struct atmel_hlcdc_plane_state *copy;
1003
1004         copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
1005         if (!copy)
1006                 return NULL;
1007
1008         if (atmel_hlcdc_plane_alloc_dscrs(p, copy)) {
1009                 kfree(copy);
1010                 return NULL;
1011         }
1012
1013         if (copy->base.fb)
1014                 drm_framebuffer_get(copy->base.fb);
1015
1016         return &copy->base;
1017 }
1018
1019 static void atmel_hlcdc_plane_atomic_destroy_state(struct drm_plane *p,
1020                                                    struct drm_plane_state *s)
1021 {
1022         struct atmel_hlcdc_plane_state *state =
1023                         drm_plane_state_to_atmel_hlcdc_plane_state(s);
1024         struct atmel_hlcdc_dc *dc = p->dev->dev_private;
1025         int i;
1026
1027         for (i = 0; i < ARRAY_SIZE(state->dscrs); i++) {
1028                 dma_pool_free(dc->dscrpool, state->dscrs[i],
1029                               state->dscrs[i]->self);
1030         }
1031
1032         if (s->fb)
1033                 drm_framebuffer_put(s->fb);
1034
1035         kfree(state);
1036 }
1037
1038 static const struct drm_plane_funcs layer_plane_funcs = {
1039         .update_plane = drm_atomic_helper_update_plane,
1040         .disable_plane = drm_atomic_helper_disable_plane,
1041         .destroy = atmel_hlcdc_plane_destroy,
1042         .reset = atmel_hlcdc_plane_reset,
1043         .atomic_duplicate_state = atmel_hlcdc_plane_atomic_duplicate_state,
1044         .atomic_destroy_state = atmel_hlcdc_plane_atomic_destroy_state,
1045         .atomic_set_property = atmel_hlcdc_plane_atomic_set_property,
1046         .atomic_get_property = atmel_hlcdc_plane_atomic_get_property,
1047 };
1048
1049 static int atmel_hlcdc_plane_create(struct drm_device *dev,
1050                                     const struct atmel_hlcdc_layer_desc *desc,
1051                                     struct atmel_hlcdc_plane_properties *props)
1052 {
1053         struct atmel_hlcdc_dc *dc = dev->dev_private;
1054         struct atmel_hlcdc_plane *plane;
1055         enum drm_plane_type type;
1056         int ret;
1057
1058         plane = devm_kzalloc(dev->dev, sizeof(*plane), GFP_KERNEL);
1059         if (!plane)
1060                 return -ENOMEM;
1061
1062         atmel_hlcdc_layer_init(&plane->layer, desc, dc->hlcdc->regmap);
1063         plane->properties = props;
1064
1065         if (desc->type == ATMEL_HLCDC_BASE_LAYER)
1066                 type = DRM_PLANE_TYPE_PRIMARY;
1067         else if (desc->type == ATMEL_HLCDC_CURSOR_LAYER)
1068                 type = DRM_PLANE_TYPE_CURSOR;
1069         else
1070                 type = DRM_PLANE_TYPE_OVERLAY;
1071
1072         ret = drm_universal_plane_init(dev, &plane->base, 0,
1073                                        &layer_plane_funcs,
1074                                        desc->formats->formats,
1075                                        desc->formats->nformats,
1076                                        NULL, type, NULL);
1077         if (ret)
1078                 return ret;
1079
1080         drm_plane_helper_add(&plane->base,
1081                              &atmel_hlcdc_layer_plane_helper_funcs);
1082
1083         /* Set default property values*/
1084         ret = atmel_hlcdc_plane_init_properties(plane, props);
1085         if (ret)
1086                 return ret;
1087
1088         dc->layers[desc->id] = &plane->layer;
1089
1090         return 0;
1091 }
1092
1093 static struct atmel_hlcdc_plane_properties *
1094 atmel_hlcdc_plane_create_properties(struct drm_device *dev)
1095 {
1096         struct atmel_hlcdc_plane_properties *props;
1097
1098         props = devm_kzalloc(dev->dev, sizeof(*props), GFP_KERNEL);
1099         if (!props)
1100                 return ERR_PTR(-ENOMEM);
1101
1102         props->alpha = drm_property_create_range(dev, 0, "alpha", 0, 255);
1103         if (!props->alpha)
1104                 return ERR_PTR(-ENOMEM);
1105
1106         return props;
1107 }
1108
1109 int atmel_hlcdc_create_planes(struct drm_device *dev)
1110 {
1111         struct atmel_hlcdc_dc *dc = dev->dev_private;
1112         struct atmel_hlcdc_plane_properties *props;
1113         const struct atmel_hlcdc_layer_desc *descs = dc->desc->layers;
1114         int nlayers = dc->desc->nlayers;
1115         int i, ret;
1116
1117         props = atmel_hlcdc_plane_create_properties(dev);
1118         if (IS_ERR(props))
1119                 return PTR_ERR(props);
1120
1121         dc->dscrpool = dmam_pool_create("atmel-hlcdc-dscr", dev->dev,
1122                                 sizeof(struct atmel_hlcdc_dma_channel_dscr),
1123                                 sizeof(u64), 0);
1124         if (!dc->dscrpool)
1125                 return -ENOMEM;
1126
1127         for (i = 0; i < nlayers; i++) {
1128                 if (descs[i].type != ATMEL_HLCDC_BASE_LAYER &&
1129                     descs[i].type != ATMEL_HLCDC_OVERLAY_LAYER &&
1130                     descs[i].type != ATMEL_HLCDC_CURSOR_LAYER)
1131                         continue;
1132
1133                 ret = atmel_hlcdc_plane_create(dev, &descs[i], props);
1134                 if (ret)
1135                         return ret;
1136         }
1137
1138         return 0;
1139 }