1 /*
2  * Copyright © 2014-2015 Broadcom
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21  * IN THE SOFTWARE.
22  */
23 
24 /**
25  * DOC: Render command list generation
26  *
27  * In the VC4 driver, render command list generation is performed by the
28  * kernel instead of userspace.  We do this because validating a
29  * user-submitted command list is hard to get right and has high CPU overhead,
30  * while the number of valid configurations for render command lists is
31  * actually fairly low.
32  */
33 
34 #include "uapi/drm/vc4_drm.h"
35 #include "vc4_drv.h"
36 #include "vc4_packet.h"
37 
38 struct vc4_rcl_setup {
39 	struct drm_gem_cma_object *color_read;
40 	struct drm_gem_cma_object *color_write;
41 	struct drm_gem_cma_object *zs_read;
42 	struct drm_gem_cma_object *zs_write;
43 	struct drm_gem_cma_object *msaa_color_write;
44 	struct drm_gem_cma_object *msaa_zs_write;
45 
46 	struct drm_gem_cma_object *rcl;
47 	u32 next_offset;
48 };
49 
50 static inline void rcl_u8(struct vc4_rcl_setup *setup, u8 val)
51 {
52 	*(u8 *)(setup->rcl->vaddr + setup->next_offset) = val;
53 	setup->next_offset += 1;
54 }
55 
56 static inline void rcl_u16(struct vc4_rcl_setup *setup, u16 val)
57 {
58 	*(u16 *)(setup->rcl->vaddr + setup->next_offset) = val;
59 	setup->next_offset += 2;
60 }
61 
62 static inline void rcl_u32(struct vc4_rcl_setup *setup, u32 val)
63 {
64 	*(u32 *)(setup->rcl->vaddr + setup->next_offset) = val;
65 	setup->next_offset += 4;
66 }
67 
68 /*
69  * Emits a no-op STORE_TILE_BUFFER_GENERAL.
70  *
71  * If we emit a PACKET_TILE_COORDINATES, it must be followed by a store of
72  * some sort before another load is triggered.
73  */
74 static void vc4_store_before_load(struct vc4_rcl_setup *setup)
75 {
76 	rcl_u8(setup, VC4_PACKET_STORE_TILE_BUFFER_GENERAL);
77 	rcl_u16(setup,
78 		VC4_SET_FIELD(VC4_LOADSTORE_TILE_BUFFER_NONE,
79 			      VC4_LOADSTORE_TILE_BUFFER_BUFFER) |
80 		VC4_STORE_TILE_BUFFER_DISABLE_COLOR_CLEAR |
81 		VC4_STORE_TILE_BUFFER_DISABLE_ZS_CLEAR |
82 		VC4_STORE_TILE_BUFFER_DISABLE_VG_MASK_CLEAR);
83 	rcl_u32(setup, 0); /* no address, since we're in None mode */
84 }
85 
86 /*
87  * Calculates the physical address of the start of a tile in a RCL surface.
88  *
89  * Unlike the other load/store packets,
90  * VC4_PACKET_LOAD/STORE_FULL_RES_TILE_BUFFER don't look at the tile
91  * coordinates packet, and instead just store to the address given.
92  */
93 static uint32_t vc4_full_res_offset(struct vc4_exec_info *exec,
94 				    struct drm_gem_cma_object *bo,
95 				    struct drm_vc4_submit_rcl_surface *surf,
96 				    uint8_t x, uint8_t y)
97 {
98 	return bo->paddr + surf->offset + VC4_TILE_BUFFER_SIZE *
99 		(DIV_ROUND_UP(exec->args->width, 32) * y + x);
100 }
101 
102 /*
103  * Emits a PACKET_TILE_COORDINATES if one isn't already pending.
104  *
105  * The tile coordinates packet triggers a pending load if there is one, are
106  * used for clipping during rendering, and determine where loads/stores happen
107  * relative to their base address.
108  */
109 static void vc4_tile_coordinates(struct vc4_rcl_setup *setup,
110 				 uint32_t x, uint32_t y)
111 {
112 	rcl_u8(setup, VC4_PACKET_TILE_COORDINATES);
113 	rcl_u8(setup, x);
114 	rcl_u8(setup, y);
115 }
116 
117 static void emit_tile(struct vc4_exec_info *exec,
118 		      struct vc4_rcl_setup *setup,
119 		      uint8_t x, uint8_t y, bool first, bool last)
120 {
121 	struct drm_vc4_submit_cl *args = exec->args;
122 	bool has_bin = args->bin_cl_size != 0;
123 
124 	/* Note that the load doesn't actually occur until the
125 	 * tile coords packet is processed, and only one load
126 	 * may be outstanding at a time.
127 	 */
128 	if (setup->color_read) {
129 		if (args->color_read.flags &
130 		    VC4_SUBMIT_RCL_SURFACE_READ_IS_FULL_RES) {
131 			rcl_u8(setup, VC4_PACKET_LOAD_FULL_RES_TILE_BUFFER);
132 			rcl_u32(setup,
133 				vc4_full_res_offset(exec, setup->color_read,
134 						    &args->color_read, x, y) |
135 				VC4_LOADSTORE_FULL_RES_DISABLE_ZS);
136 		} else {
137 			rcl_u8(setup, VC4_PACKET_LOAD_TILE_BUFFER_GENERAL);
138 			rcl_u16(setup, args->color_read.bits);
139 			rcl_u32(setup, setup->color_read->paddr +
140 				args->color_read.offset);
141 		}
142 	}
143 
144 	if (setup->zs_read) {
145 		if (args->zs_read.flags &
146 		    VC4_SUBMIT_RCL_SURFACE_READ_IS_FULL_RES) {
147 			rcl_u8(setup, VC4_PACKET_LOAD_FULL_RES_TILE_BUFFER);
148 			rcl_u32(setup,
149 				vc4_full_res_offset(exec, setup->zs_read,
150 						    &args->zs_read, x, y) |
151 				VC4_LOADSTORE_FULL_RES_DISABLE_COLOR);
152 		} else {
153 			if (setup->color_read) {
154 				/* Exec previous load. */
155 				vc4_tile_coordinates(setup, x, y);
156 				vc4_store_before_load(setup);
157 			}
158 
159 			rcl_u8(setup, VC4_PACKET_LOAD_TILE_BUFFER_GENERAL);
160 			rcl_u16(setup, args->zs_read.bits);
161 			rcl_u32(setup, setup->zs_read->paddr +
162 				args->zs_read.offset);
163 		}
164 	}
165 
166 	/* Clipping depends on tile coordinates having been
167 	 * emitted, so we always need one here.
168 	 */
169 	vc4_tile_coordinates(setup, x, y);
170 
171 	/* Wait for the binner before jumping to the first
172 	 * tile's lists.
173 	 */
174 	if (first && has_bin)
175 		rcl_u8(setup, VC4_PACKET_WAIT_ON_SEMAPHORE);
176 
177 	if (has_bin) {
178 		rcl_u8(setup, VC4_PACKET_BRANCH_TO_SUB_LIST);
179 		rcl_u32(setup, (exec->tile_bo->paddr +
180 				exec->tile_alloc_offset +
181 				(y * exec->bin_tiles_x + x) * 32));
182 	}
183 
184 	if (setup->msaa_color_write) {
185 		bool last_tile_write = (!setup->msaa_zs_write &&
186 					!setup->zs_write &&
187 					!setup->color_write);
188 		uint32_t bits = VC4_LOADSTORE_FULL_RES_DISABLE_ZS;
189 
190 		if (!last_tile_write)
191 			bits |= VC4_LOADSTORE_FULL_RES_DISABLE_CLEAR_ALL;
192 		else if (last)
193 			bits |= VC4_LOADSTORE_FULL_RES_EOF;
194 		rcl_u8(setup, VC4_PACKET_STORE_FULL_RES_TILE_BUFFER);
195 		rcl_u32(setup,
196 			vc4_full_res_offset(exec, setup->msaa_color_write,
197 					    &args->msaa_color_write, x, y) |
198 			bits);
199 	}
200 
201 	if (setup->msaa_zs_write) {
202 		bool last_tile_write = (!setup->zs_write &&
203 					!setup->color_write);
204 		uint32_t bits = VC4_LOADSTORE_FULL_RES_DISABLE_COLOR;
205 
206 		if (setup->msaa_color_write)
207 			vc4_tile_coordinates(setup, x, y);
208 		if (!last_tile_write)
209 			bits |= VC4_LOADSTORE_FULL_RES_DISABLE_CLEAR_ALL;
210 		else if (last)
211 			bits |= VC4_LOADSTORE_FULL_RES_EOF;
212 		rcl_u8(setup, VC4_PACKET_STORE_FULL_RES_TILE_BUFFER);
213 		rcl_u32(setup,
214 			vc4_full_res_offset(exec, setup->msaa_zs_write,
215 					    &args->msaa_zs_write, x, y) |
216 			bits);
217 	}
218 
219 	if (setup->zs_write) {
220 		bool last_tile_write = !setup->color_write;
221 
222 		if (setup->msaa_color_write || setup->msaa_zs_write)
223 			vc4_tile_coordinates(setup, x, y);
224 
225 		rcl_u8(setup, VC4_PACKET_STORE_TILE_BUFFER_GENERAL);
226 		rcl_u16(setup, args->zs_write.bits |
227 			(last_tile_write ?
228 			 0 : VC4_STORE_TILE_BUFFER_DISABLE_COLOR_CLEAR));
229 		rcl_u32(setup,
230 			(setup->zs_write->paddr + args->zs_write.offset) |
231 			((last && last_tile_write) ?
232 			 VC4_LOADSTORE_TILE_BUFFER_EOF : 0));
233 	}
234 
235 	if (setup->color_write) {
236 		if (setup->msaa_color_write || setup->msaa_zs_write ||
237 		    setup->zs_write) {
238 			vc4_tile_coordinates(setup, x, y);
239 		}
240 
241 		if (last)
242 			rcl_u8(setup, VC4_PACKET_STORE_MS_TILE_BUFFER_AND_EOF);
243 		else
244 			rcl_u8(setup, VC4_PACKET_STORE_MS_TILE_BUFFER);
245 	}
246 }
247 
248 static int vc4_create_rcl_bo(struct drm_device *dev, struct vc4_exec_info *exec,
249 			     struct vc4_rcl_setup *setup)
250 {
251 	struct drm_vc4_submit_cl *args = exec->args;
252 	bool has_bin = args->bin_cl_size != 0;
253 	uint8_t min_x_tile = args->min_x_tile;
254 	uint8_t min_y_tile = args->min_y_tile;
255 	uint8_t max_x_tile = args->max_x_tile;
256 	uint8_t max_y_tile = args->max_y_tile;
257 	uint8_t xtiles = max_x_tile - min_x_tile + 1;
258 	uint8_t ytiles = max_y_tile - min_y_tile + 1;
259 	uint8_t x, y;
260 	uint32_t size, loop_body_size;
261 
262 	size = VC4_PACKET_TILE_RENDERING_MODE_CONFIG_SIZE;
263 	loop_body_size = VC4_PACKET_TILE_COORDINATES_SIZE;
264 
265 	if (args->flags & VC4_SUBMIT_CL_USE_CLEAR_COLOR) {
266 		size += VC4_PACKET_CLEAR_COLORS_SIZE +
267 			VC4_PACKET_TILE_COORDINATES_SIZE +
268 			VC4_PACKET_STORE_TILE_BUFFER_GENERAL_SIZE;
269 	}
270 
271 	if (setup->color_read) {
272 		if (args->color_read.flags &
273 		    VC4_SUBMIT_RCL_SURFACE_READ_IS_FULL_RES) {
274 			loop_body_size += VC4_PACKET_LOAD_FULL_RES_TILE_BUFFER_SIZE;
275 		} else {
276 			loop_body_size += VC4_PACKET_LOAD_TILE_BUFFER_GENERAL_SIZE;
277 		}
278 	}
279 	if (setup->zs_read) {
280 		if (args->zs_read.flags &
281 		    VC4_SUBMIT_RCL_SURFACE_READ_IS_FULL_RES) {
282 			loop_body_size += VC4_PACKET_LOAD_FULL_RES_TILE_BUFFER_SIZE;
283 		} else {
284 			if (setup->color_read &&
285 			    !(args->color_read.flags &
286 			      VC4_SUBMIT_RCL_SURFACE_READ_IS_FULL_RES)) {
287 				loop_body_size += VC4_PACKET_TILE_COORDINATES_SIZE;
288 				loop_body_size += VC4_PACKET_STORE_TILE_BUFFER_GENERAL_SIZE;
289 			}
290 			loop_body_size += VC4_PACKET_LOAD_TILE_BUFFER_GENERAL_SIZE;
291 		}
292 	}
293 
294 	if (has_bin) {
295 		size += VC4_PACKET_WAIT_ON_SEMAPHORE_SIZE;
296 		loop_body_size += VC4_PACKET_BRANCH_TO_SUB_LIST_SIZE;
297 	}
298 
299 	if (setup->msaa_color_write)
300 		loop_body_size += VC4_PACKET_STORE_FULL_RES_TILE_BUFFER_SIZE;
301 	if (setup->msaa_zs_write)
302 		loop_body_size += VC4_PACKET_STORE_FULL_RES_TILE_BUFFER_SIZE;
303 
304 	if (setup->zs_write)
305 		loop_body_size += VC4_PACKET_STORE_TILE_BUFFER_GENERAL_SIZE;
306 	if (setup->color_write)
307 		loop_body_size += VC4_PACKET_STORE_MS_TILE_BUFFER_SIZE;
308 
309 	/* We need a VC4_PACKET_TILE_COORDINATES in between each store. */
310 	loop_body_size += VC4_PACKET_TILE_COORDINATES_SIZE *
311 		((setup->msaa_color_write != NULL) +
312 		 (setup->msaa_zs_write != NULL) +
313 		 (setup->color_write != NULL) +
314 		 (setup->zs_write != NULL) - 1);
315 
316 	size += xtiles * ytiles * loop_body_size;
317 
318 	setup->rcl = &vc4_bo_create(dev, size, true)->base;
319 	if (IS_ERR(setup->rcl))
320 		return PTR_ERR(setup->rcl);
321 	list_add_tail(&to_vc4_bo(&setup->rcl->base)->unref_head,
322 		      &exec->unref_list);
323 
324 	/* The tile buffer gets cleared when the previous tile is stored.  If
325 	 * the clear values changed between frames, then the tile buffer has
326 	 * stale clear values in it, so we have to do a store in None mode (no
327 	 * writes) so that we trigger the tile buffer clear.
328 	 */
329 	if (args->flags & VC4_SUBMIT_CL_USE_CLEAR_COLOR) {
330 		rcl_u8(setup, VC4_PACKET_CLEAR_COLORS);
331 		rcl_u32(setup, args->clear_color[0]);
332 		rcl_u32(setup, args->clear_color[1]);
333 		rcl_u32(setup, args->clear_z);
334 		rcl_u8(setup, args->clear_s);
335 
336 		vc4_tile_coordinates(setup, 0, 0);
337 
338 		rcl_u8(setup, VC4_PACKET_STORE_TILE_BUFFER_GENERAL);
339 		rcl_u16(setup, VC4_LOADSTORE_TILE_BUFFER_NONE);
340 		rcl_u32(setup, 0); /* no address, since we're in None mode */
341 	}
342 
343 	rcl_u8(setup, VC4_PACKET_TILE_RENDERING_MODE_CONFIG);
344 	rcl_u32(setup,
345 		(setup->color_write ? (setup->color_write->paddr +
346 				       args->color_write.offset) :
347 		 0));
348 	rcl_u16(setup, args->width);
349 	rcl_u16(setup, args->height);
350 	rcl_u16(setup, args->color_write.bits);
351 
352 	for (y = min_y_tile; y <= max_y_tile; y++) {
353 		for (x = min_x_tile; x <= max_x_tile; x++) {
354 			bool first = (x == min_x_tile && y == min_y_tile);
355 			bool last = (x == max_x_tile && y == max_y_tile);
356 
357 			emit_tile(exec, setup, x, y, first, last);
358 		}
359 	}
360 
361 	BUG_ON(setup->next_offset != size);
362 	exec->ct1ca = setup->rcl->paddr;
363 	exec->ct1ea = setup->rcl->paddr + setup->next_offset;
364 
365 	return 0;
366 }
367 
368 static int vc4_full_res_bounds_check(struct vc4_exec_info *exec,
369 				     struct drm_gem_cma_object *obj,
370 				     struct drm_vc4_submit_rcl_surface *surf)
371 {
372 	struct drm_vc4_submit_cl *args = exec->args;
373 	u32 render_tiles_stride = DIV_ROUND_UP(exec->args->width, 32);
374 
375 	if (surf->offset > obj->base.size) {
376 		DRM_ERROR("surface offset %d > BO size %zd\n",
377 			  surf->offset, obj->base.size);
378 		return -EINVAL;
379 	}
380 
381 	if ((obj->base.size - surf->offset) / VC4_TILE_BUFFER_SIZE <
382 	    render_tiles_stride * args->max_y_tile + args->max_x_tile) {
383 		DRM_ERROR("MSAA tile %d, %d out of bounds "
384 			  "(bo size %zd, offset %d).\n",
385 			  args->max_x_tile, args->max_y_tile,
386 			  obj->base.size,
387 			  surf->offset);
388 		return -EINVAL;
389 	}
390 
391 	return 0;
392 }
393 
394 static int vc4_rcl_msaa_surface_setup(struct vc4_exec_info *exec,
395 				      struct drm_gem_cma_object **obj,
396 				      struct drm_vc4_submit_rcl_surface *surf)
397 {
398 	if (surf->flags != 0 || surf->bits != 0) {
399 		DRM_ERROR("MSAA surface had nonzero flags/bits\n");
400 		return -EINVAL;
401 	}
402 
403 	if (surf->hindex == ~0)
404 		return 0;
405 
406 	*obj = vc4_use_bo(exec, surf->hindex);
407 	if (!*obj)
408 		return -EINVAL;
409 
410 	if (surf->offset & 0xf) {
411 		DRM_ERROR("MSAA write must be 16b aligned.\n");
412 		return -EINVAL;
413 	}
414 
415 	return vc4_full_res_bounds_check(exec, *obj, surf);
416 }
417 
418 static int vc4_rcl_surface_setup(struct vc4_exec_info *exec,
419 				 struct drm_gem_cma_object **obj,
420 				 struct drm_vc4_submit_rcl_surface *surf)
421 {
422 	uint8_t tiling = VC4_GET_FIELD(surf->bits,
423 				       VC4_LOADSTORE_TILE_BUFFER_TILING);
424 	uint8_t buffer = VC4_GET_FIELD(surf->bits,
425 				       VC4_LOADSTORE_TILE_BUFFER_BUFFER);
426 	uint8_t format = VC4_GET_FIELD(surf->bits,
427 				       VC4_LOADSTORE_TILE_BUFFER_FORMAT);
428 	int cpp;
429 	int ret;
430 
431 	if (surf->flags & ~VC4_SUBMIT_RCL_SURFACE_READ_IS_FULL_RES) {
432 		DRM_ERROR("Extra flags set\n");
433 		return -EINVAL;
434 	}
435 
436 	if (surf->hindex == ~0)
437 		return 0;
438 
439 	*obj = vc4_use_bo(exec, surf->hindex);
440 	if (!*obj)
441 		return -EINVAL;
442 
443 	if (surf->flags & VC4_SUBMIT_RCL_SURFACE_READ_IS_FULL_RES) {
444 		if (surf == &exec->args->zs_write) {
445 			DRM_ERROR("general zs write may not be a full-res.\n");
446 			return -EINVAL;
447 		}
448 
449 		if (surf->bits != 0) {
450 			DRM_ERROR("load/store general bits set with "
451 				  "full res load/store.\n");
452 			return -EINVAL;
453 		}
454 
455 		ret = vc4_full_res_bounds_check(exec, *obj, surf);
456 		if (!ret)
457 			return ret;
458 
459 		return 0;
460 	}
461 
462 	if (surf->bits & ~(VC4_LOADSTORE_TILE_BUFFER_TILING_MASK |
463 			   VC4_LOADSTORE_TILE_BUFFER_BUFFER_MASK |
464 			   VC4_LOADSTORE_TILE_BUFFER_FORMAT_MASK)) {
465 		DRM_ERROR("Unknown bits in load/store: 0x%04x\n",
466 			  surf->bits);
467 		return -EINVAL;
468 	}
469 
470 	if (tiling > VC4_TILING_FORMAT_LT) {
471 		DRM_ERROR("Bad tiling format\n");
472 		return -EINVAL;
473 	}
474 
475 	if (buffer == VC4_LOADSTORE_TILE_BUFFER_ZS) {
476 		if (format != 0) {
477 			DRM_ERROR("No color format should be set for ZS\n");
478 			return -EINVAL;
479 		}
480 		cpp = 4;
481 	} else if (buffer == VC4_LOADSTORE_TILE_BUFFER_COLOR) {
482 		switch (format) {
483 		case VC4_LOADSTORE_TILE_BUFFER_BGR565:
484 		case VC4_LOADSTORE_TILE_BUFFER_BGR565_DITHER:
485 			cpp = 2;
486 			break;
487 		case VC4_LOADSTORE_TILE_BUFFER_RGBA8888:
488 			cpp = 4;
489 			break;
490 		default:
491 			DRM_ERROR("Bad tile buffer format\n");
492 			return -EINVAL;
493 		}
494 	} else {
495 		DRM_ERROR("Bad load/store buffer %d.\n", buffer);
496 		return -EINVAL;
497 	}
498 
499 	if (surf->offset & 0xf) {
500 		DRM_ERROR("load/store buffer must be 16b aligned.\n");
501 		return -EINVAL;
502 	}
503 
504 	if (!vc4_check_tex_size(exec, *obj, surf->offset, tiling,
505 				exec->args->width, exec->args->height, cpp)) {
506 		return -EINVAL;
507 	}
508 
509 	return 0;
510 }
511 
512 static int
513 vc4_rcl_render_config_surface_setup(struct vc4_exec_info *exec,
514 				    struct vc4_rcl_setup *setup,
515 				    struct drm_gem_cma_object **obj,
516 				    struct drm_vc4_submit_rcl_surface *surf)
517 {
518 	uint8_t tiling = VC4_GET_FIELD(surf->bits,
519 				       VC4_RENDER_CONFIG_MEMORY_FORMAT);
520 	uint8_t format = VC4_GET_FIELD(surf->bits,
521 				       VC4_RENDER_CONFIG_FORMAT);
522 	int cpp;
523 
524 	if (surf->flags != 0) {
525 		DRM_ERROR("No flags supported on render config.\n");
526 		return -EINVAL;
527 	}
528 
529 	if (surf->bits & ~(VC4_RENDER_CONFIG_MEMORY_FORMAT_MASK |
530 			   VC4_RENDER_CONFIG_FORMAT_MASK |
531 			   VC4_RENDER_CONFIG_MS_MODE_4X |
532 			   VC4_RENDER_CONFIG_DECIMATE_MODE_4X)) {
533 		DRM_ERROR("Unknown bits in render config: 0x%04x\n",
534 			  surf->bits);
535 		return -EINVAL;
536 	}
537 
538 	if (surf->hindex == ~0)
539 		return 0;
540 
541 	*obj = vc4_use_bo(exec, surf->hindex);
542 	if (!*obj)
543 		return -EINVAL;
544 
545 	if (tiling > VC4_TILING_FORMAT_LT) {
546 		DRM_ERROR("Bad tiling format\n");
547 		return -EINVAL;
548 	}
549 
550 	switch (format) {
551 	case VC4_RENDER_CONFIG_FORMAT_BGR565_DITHERED:
552 	case VC4_RENDER_CONFIG_FORMAT_BGR565:
553 		cpp = 2;
554 		break;
555 	case VC4_RENDER_CONFIG_FORMAT_RGBA8888:
556 		cpp = 4;
557 		break;
558 	default:
559 		DRM_ERROR("Bad tile buffer format\n");
560 		return -EINVAL;
561 	}
562 
563 	if (!vc4_check_tex_size(exec, *obj, surf->offset, tiling,
564 				exec->args->width, exec->args->height, cpp)) {
565 		return -EINVAL;
566 	}
567 
568 	return 0;
569 }
570 
571 int vc4_get_rcl(struct drm_device *dev, struct vc4_exec_info *exec)
572 {
573 	struct vc4_rcl_setup setup = {0};
574 	struct drm_vc4_submit_cl *args = exec->args;
575 	bool has_bin = args->bin_cl_size != 0;
576 	int ret;
577 
578 	if (args->min_x_tile > args->max_x_tile ||
579 	    args->min_y_tile > args->max_y_tile) {
580 		DRM_ERROR("Bad render tile set (%d,%d)-(%d,%d)\n",
581 			  args->min_x_tile, args->min_y_tile,
582 			  args->max_x_tile, args->max_y_tile);
583 		return -EINVAL;
584 	}
585 
586 	if (has_bin &&
587 	    (args->max_x_tile > exec->bin_tiles_x ||
588 	     args->max_y_tile > exec->bin_tiles_y)) {
589 		DRM_ERROR("Render tiles (%d,%d) outside of bin config "
590 			  "(%d,%d)\n",
591 			  args->max_x_tile, args->max_y_tile,
592 			  exec->bin_tiles_x, exec->bin_tiles_y);
593 		return -EINVAL;
594 	}
595 
596 	ret = vc4_rcl_render_config_surface_setup(exec, &setup,
597 						  &setup.color_write,
598 						  &args->color_write);
599 	if (ret)
600 		return ret;
601 
602 	ret = vc4_rcl_surface_setup(exec, &setup.color_read, &args->color_read);
603 	if (ret)
604 		return ret;
605 
606 	ret = vc4_rcl_surface_setup(exec, &setup.zs_read, &args->zs_read);
607 	if (ret)
608 		return ret;
609 
610 	ret = vc4_rcl_surface_setup(exec, &setup.zs_write, &args->zs_write);
611 	if (ret)
612 		return ret;
613 
614 	ret = vc4_rcl_msaa_surface_setup(exec, &setup.msaa_color_write,
615 					 &args->msaa_color_write);
616 	if (ret)
617 		return ret;
618 
619 	ret = vc4_rcl_msaa_surface_setup(exec, &setup.msaa_zs_write,
620 					 &args->msaa_zs_write);
621 	if (ret)
622 		return ret;
623 
624 	/* We shouldn't even have the job submitted to us if there's no
625 	 * surface to write out.
626 	 */
627 	if (!setup.color_write && !setup.zs_write &&
628 	    !setup.msaa_color_write && !setup.msaa_zs_write) {
629 		DRM_ERROR("RCL requires color or Z/S write\n");
630 		return -EINVAL;
631 	}
632 
633 	return vc4_create_rcl_bo(dev, exec, &setup);
634 }
635