1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * (C) COPYRIGHT 2016 ARM Limited. All rights reserved.
4  * Author: Liviu Dudau <Liviu.Dudau@arm.com>
5  *
6  * ARM Mali DP plane manipulation routines.
7  */
8 
9 #include <linux/iommu.h>
10 #include <linux/platform_device.h>
11 
12 #include <drm/drm_atomic.h>
13 #include <drm/drm_atomic_helper.h>
14 #include <drm/drm_drv.h>
15 #include <drm/drm_fb_cma_helper.h>
16 #include <drm/drm_fourcc.h>
17 #include <drm/drm_gem_cma_helper.h>
18 #include <drm/drm_gem_framebuffer_helper.h>
19 #include <drm/drm_plane_helper.h>
20 #include <drm/drm_print.h>
21 
22 #include "malidp_hw.h"
23 #include "malidp_drv.h"
24 
25 /* Layer specific register offsets */
26 #define MALIDP_LAYER_FORMAT		0x000
27 #define   LAYER_FORMAT_MASK		0x3f
28 #define MALIDP_LAYER_CONTROL		0x004
29 #define   LAYER_ENABLE			(1 << 0)
30 #define   LAYER_FLOWCFG_MASK		7
31 #define   LAYER_FLOWCFG(x)		(((x) & LAYER_FLOWCFG_MASK) << 1)
32 #define     LAYER_FLOWCFG_SCALE_SE	3
33 #define   LAYER_ROT_OFFSET		8
34 #define   LAYER_H_FLIP			(1 << 10)
35 #define   LAYER_V_FLIP			(1 << 11)
36 #define   LAYER_ROT_MASK		(0xf << 8)
37 #define   LAYER_COMP_MASK		(0x3 << 12)
38 #define   LAYER_COMP_PIXEL		(0x3 << 12)
39 #define   LAYER_COMP_PLANE		(0x2 << 12)
40 #define   LAYER_PMUL_ENABLE		(0x1 << 14)
41 #define   LAYER_ALPHA_OFFSET		(16)
42 #define   LAYER_ALPHA_MASK		(0xff)
43 #define   LAYER_ALPHA(x)		(((x) & LAYER_ALPHA_MASK) << LAYER_ALPHA_OFFSET)
44 #define MALIDP_LAYER_COMPOSE		0x008
45 #define MALIDP_LAYER_SIZE		0x00c
46 #define   LAYER_H_VAL(x)		(((x) & 0x1fff) << 0)
47 #define   LAYER_V_VAL(x)		(((x) & 0x1fff) << 16)
48 #define MALIDP_LAYER_COMP_SIZE		0x010
49 #define MALIDP_LAYER_OFFSET		0x014
50 #define MALIDP550_LS_ENABLE		0x01c
51 #define MALIDP550_LS_R1_IN_SIZE		0x020
52 
53 #define MODIFIERS_COUNT_MAX		15
54 
55 /*
56  * This 4-entry look-up-table is used to determine the full 8-bit alpha value
57  * for formats with 1- or 2-bit alpha channels.
58  * We set it to give 100%/0% opacity for 1-bit formats and 100%/66%/33%/0%
59  * opacity for 2-bit formats.
60  */
61 #define MALIDP_ALPHA_LUT 0xffaa5500
62 
63 /* page sizes the MMU prefetcher can support */
64 #define MALIDP_MMU_PREFETCH_PARTIAL_PGSIZES	(SZ_4K | SZ_64K)
65 #define MALIDP_MMU_PREFETCH_FULL_PGSIZES	(SZ_1M | SZ_2M)
66 
67 /* readahead for partial-frame prefetch */
68 #define MALIDP_MMU_PREFETCH_READAHEAD		8
69 
70 static void malidp_de_plane_destroy(struct drm_plane *plane)
71 {
72 	struct malidp_plane *mp = to_malidp_plane(plane);
73 
74 	drm_plane_cleanup(plane);
75 	kfree(mp);
76 }
77 
78 /*
79  * Replicate what the default ->reset hook does: free the state pointer and
80  * allocate a new empty object. We just need enough space to store
81  * a malidp_plane_state instead of a drm_plane_state.
82  */
83 static void malidp_plane_reset(struct drm_plane *plane)
84 {
85 	struct malidp_plane_state *state = to_malidp_plane_state(plane->state);
86 
87 	if (state)
88 		__drm_atomic_helper_plane_destroy_state(&state->base);
89 	kfree(state);
90 	plane->state = NULL;
91 	state = kzalloc(sizeof(*state), GFP_KERNEL);
92 	if (state)
93 		__drm_atomic_helper_plane_reset(plane, &state->base);
94 }
95 
96 static struct
97 drm_plane_state *malidp_duplicate_plane_state(struct drm_plane *plane)
98 {
99 	struct malidp_plane_state *state, *m_state;
100 
101 	if (!plane->state)
102 		return NULL;
103 
104 	state = kmalloc(sizeof(*state), GFP_KERNEL);
105 	if (!state)
106 		return NULL;
107 
108 	m_state = to_malidp_plane_state(plane->state);
109 	__drm_atomic_helper_plane_duplicate_state(plane, &state->base);
110 	state->rotmem_size = m_state->rotmem_size;
111 	state->format = m_state->format;
112 	state->n_planes = m_state->n_planes;
113 
114 	state->mmu_prefetch_mode = m_state->mmu_prefetch_mode;
115 	state->mmu_prefetch_pgsize = m_state->mmu_prefetch_pgsize;
116 
117 	return &state->base;
118 }
119 
120 static void malidp_destroy_plane_state(struct drm_plane *plane,
121 				       struct drm_plane_state *state)
122 {
123 	struct malidp_plane_state *m_state = to_malidp_plane_state(state);
124 
125 	__drm_atomic_helper_plane_destroy_state(state);
126 	kfree(m_state);
127 }
128 
129 static const char * const prefetch_mode_names[] = {
130 	[MALIDP_PREFETCH_MODE_NONE] = "MMU_PREFETCH_NONE",
131 	[MALIDP_PREFETCH_MODE_PARTIAL] = "MMU_PREFETCH_PARTIAL",
132 	[MALIDP_PREFETCH_MODE_FULL] = "MMU_PREFETCH_FULL",
133 };
134 
135 static void malidp_plane_atomic_print_state(struct drm_printer *p,
136 					    const struct drm_plane_state *state)
137 {
138 	struct malidp_plane_state *ms = to_malidp_plane_state(state);
139 
140 	drm_printf(p, "\trotmem_size=%u\n", ms->rotmem_size);
141 	drm_printf(p, "\tformat_id=%u\n", ms->format);
142 	drm_printf(p, "\tn_planes=%u\n", ms->n_planes);
143 	drm_printf(p, "\tmmu_prefetch_mode=%s\n",
144 		   prefetch_mode_names[ms->mmu_prefetch_mode]);
145 	drm_printf(p, "\tmmu_prefetch_pgsize=%d\n", ms->mmu_prefetch_pgsize);
146 }
147 
148 bool malidp_format_mod_supported(struct drm_device *drm,
149 				 u32 format, u64 modifier)
150 {
151 	const struct drm_format_info *info;
152 	const u64 *modifiers;
153 	struct malidp_drm *malidp = drm->dev_private;
154 	const struct malidp_hw_regmap *map = &malidp->dev->hw->map;
155 
156 	if (WARN_ON(modifier == DRM_FORMAT_MOD_INVALID))
157 		return false;
158 
159 	/* Some pixel formats are supported without any modifier */
160 	if (modifier == DRM_FORMAT_MOD_LINEAR) {
161 		/*
162 		 * However these pixel formats need to be supported with
163 		 * modifiers only
164 		 */
165 		return !malidp_hw_format_is_afbc_only(format);
166 	}
167 
168 	if ((modifier >> 56) != DRM_FORMAT_MOD_VENDOR_ARM) {
169 		DRM_ERROR("Unknown modifier (not Arm)\n");
170 		return false;
171 	}
172 
173 	if (modifier &
174 	    ~DRM_FORMAT_MOD_ARM_AFBC(AFBC_MOD_VALID_BITS)) {
175 		DRM_DEBUG_KMS("Unsupported modifiers\n");
176 		return false;
177 	}
178 
179 	modifiers = malidp_format_modifiers;
180 
181 	/* SPLIT buffers must use SPARSE layout */
182 	if (WARN_ON_ONCE((modifier & AFBC_SPLIT) && !(modifier & AFBC_SPARSE)))
183 		return false;
184 
185 	/* CBR only applies to YUV formats, where YTR should be always 0 */
186 	if (WARN_ON_ONCE((modifier & AFBC_CBR) && (modifier & AFBC_YTR)))
187 		return false;
188 
189 	while (*modifiers != DRM_FORMAT_MOD_INVALID) {
190 		if (*modifiers == modifier)
191 			break;
192 
193 		modifiers++;
194 	}
195 
196 	/* return false, if the modifier was not found */
197 	if (*modifiers == DRM_FORMAT_MOD_INVALID) {
198 		DRM_DEBUG_KMS("Unsupported modifier\n");
199 		return false;
200 	}
201 
202 	info = drm_format_info(format);
203 
204 	if (info->num_planes != 1) {
205 		DRM_DEBUG_KMS("AFBC buffers expect one plane\n");
206 		return false;
207 	}
208 
209 	if (malidp_hw_format_is_linear_only(format) == true) {
210 		DRM_DEBUG_KMS("Given format (0x%x) is supported is linear mode only\n",
211 			      format);
212 		return false;
213 	}
214 
215 	/*
216 	 * RGB formats need to provide YTR modifier and YUV formats should not
217 	 * provide YTR modifier.
218 	 */
219 	if (!(info->is_yuv) != !!(modifier & AFBC_FORMAT_MOD_YTR)) {
220 		DRM_DEBUG_KMS("AFBC_FORMAT_MOD_YTR is %s for %s formats\n",
221 			      info->is_yuv ? "disallowed" : "mandatory",
222 			      info->is_yuv ? "YUV" : "RGB");
223 		return false;
224 	}
225 
226 	if (modifier & AFBC_SPLIT) {
227 		if (!info->is_yuv) {
228 			if (info->cpp[0] <= 2) {
229 				DRM_DEBUG_KMS("RGB formats <= 16bpp are not supported with SPLIT\n");
230 				return false;
231 			}
232 		}
233 
234 		if ((info->hsub != 1) || (info->vsub != 1)) {
235 			if (!(format == DRM_FORMAT_YUV420_10BIT &&
236 			      (map->features & MALIDP_DEVICE_AFBC_YUV_420_10_SUPPORT_SPLIT))) {
237 				DRM_DEBUG_KMS("Formats which are sub-sampled should never be split\n");
238 				return false;
239 			}
240 		}
241 	}
242 
243 	if (modifier & AFBC_CBR) {
244 		if ((info->hsub == 1) || (info->vsub == 1)) {
245 			DRM_DEBUG_KMS("Formats which are not sub-sampled should not have CBR set\n");
246 			return false;
247 		}
248 	}
249 
250 	return true;
251 }
252 
253 static bool malidp_format_mod_supported_per_plane(struct drm_plane *plane,
254 						  u32 format, u64 modifier)
255 {
256 	return malidp_format_mod_supported(plane->dev, format, modifier);
257 }
258 
259 static const struct drm_plane_funcs malidp_de_plane_funcs = {
260 	.update_plane = drm_atomic_helper_update_plane,
261 	.disable_plane = drm_atomic_helper_disable_plane,
262 	.destroy = malidp_de_plane_destroy,
263 	.reset = malidp_plane_reset,
264 	.atomic_duplicate_state = malidp_duplicate_plane_state,
265 	.atomic_destroy_state = malidp_destroy_plane_state,
266 	.atomic_print_state = malidp_plane_atomic_print_state,
267 	.format_mod_supported = malidp_format_mod_supported_per_plane,
268 };
269 
270 static int malidp_se_check_scaling(struct malidp_plane *mp,
271 				   struct drm_plane_state *state)
272 {
273 	struct drm_crtc_state *crtc_state =
274 		drm_atomic_get_existing_crtc_state(state->state, state->crtc);
275 	struct malidp_crtc_state *mc;
276 	u32 src_w, src_h;
277 	int ret;
278 
279 	if (!crtc_state)
280 		return -EINVAL;
281 
282 	mc = to_malidp_crtc_state(crtc_state);
283 
284 	ret = drm_atomic_helper_check_plane_state(state, crtc_state,
285 						  0, INT_MAX, true, true);
286 	if (ret)
287 		return ret;
288 
289 	if (state->rotation & MALIDP_ROTATED_MASK) {
290 		src_w = state->src_h >> 16;
291 		src_h = state->src_w >> 16;
292 	} else {
293 		src_w = state->src_w >> 16;
294 		src_h = state->src_h >> 16;
295 	}
296 
297 	if ((state->crtc_w == src_w) && (state->crtc_h == src_h)) {
298 		/* Scaling not necessary for this plane. */
299 		mc->scaled_planes_mask &= ~(mp->layer->id);
300 		return 0;
301 	}
302 
303 	if (mp->layer->id & (DE_SMART | DE_GRAPHICS2))
304 		return -EINVAL;
305 
306 	mc->scaled_planes_mask |= mp->layer->id;
307 	/* Defer scaling requirements calculation to the crtc check. */
308 	return 0;
309 }
310 
311 static u32 malidp_get_pgsize_bitmap(struct malidp_plane *mp)
312 {
313 	u32 pgsize_bitmap = 0;
314 
315 	if (iommu_present(&platform_bus_type)) {
316 		struct iommu_domain *mmu_dom =
317 			iommu_get_domain_for_dev(mp->base.dev->dev);
318 
319 		if (mmu_dom)
320 			pgsize_bitmap = mmu_dom->pgsize_bitmap;
321 	}
322 
323 	return pgsize_bitmap;
324 }
325 
326 /*
327  * Check if the framebuffer is entirely made up of pages at least pgsize in
328  * size. Only a heuristic: assumes that each scatterlist entry has been aligned
329  * to the largest page size smaller than its length and that the MMU maps to
330  * the largest page size possible.
331  */
332 static bool malidp_check_pages_threshold(struct malidp_plane_state *ms,
333 					 u32 pgsize)
334 {
335 	int i;
336 
337 	for (i = 0; i < ms->n_planes; i++) {
338 		struct drm_gem_object *obj;
339 		struct drm_gem_cma_object *cma_obj;
340 		struct sg_table *sgt;
341 		struct scatterlist *sgl;
342 
343 		obj = drm_gem_fb_get_obj(ms->base.fb, i);
344 		cma_obj = to_drm_gem_cma_obj(obj);
345 
346 		if (cma_obj->sgt)
347 			sgt = cma_obj->sgt;
348 		else
349 			sgt = obj->funcs->get_sg_table(obj);
350 
351 		if (!sgt)
352 			return false;
353 
354 		sgl = sgt->sgl;
355 
356 		while (sgl) {
357 			if (sgl->length < pgsize) {
358 				if (!cma_obj->sgt)
359 					kfree(sgt);
360 				return false;
361 			}
362 
363 			sgl = sg_next(sgl);
364 		}
365 		if (!cma_obj->sgt)
366 			kfree(sgt);
367 	}
368 
369 	return true;
370 }
371 
372 /*
373  * Check if it is possible to enable partial-frame MMU prefetch given the
374  * current format, AFBC state and rotation.
375  */
376 static bool malidp_partial_prefetch_supported(u32 format, u64 modifier,
377 					      unsigned int rotation)
378 {
379 	bool afbc, sparse;
380 
381 	/* rotation and horizontal flip not supported for partial prefetch */
382 	if (rotation & (DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_180 |
383 			DRM_MODE_ROTATE_270 | DRM_MODE_REFLECT_X))
384 		return false;
385 
386 	afbc = modifier & DRM_FORMAT_MOD_ARM_AFBC(0);
387 	sparse = modifier & AFBC_FORMAT_MOD_SPARSE;
388 
389 	switch (format) {
390 	case DRM_FORMAT_ARGB2101010:
391 	case DRM_FORMAT_RGBA1010102:
392 	case DRM_FORMAT_BGRA1010102:
393 	case DRM_FORMAT_ARGB8888:
394 	case DRM_FORMAT_RGBA8888:
395 	case DRM_FORMAT_BGRA8888:
396 	case DRM_FORMAT_XRGB8888:
397 	case DRM_FORMAT_XBGR8888:
398 	case DRM_FORMAT_RGBX8888:
399 	case DRM_FORMAT_BGRX8888:
400 	case DRM_FORMAT_RGB888:
401 	case DRM_FORMAT_RGBA5551:
402 	case DRM_FORMAT_RGB565:
403 		/* always supported */
404 		return true;
405 
406 	case DRM_FORMAT_ABGR2101010:
407 	case DRM_FORMAT_ABGR8888:
408 	case DRM_FORMAT_ABGR1555:
409 	case DRM_FORMAT_BGR565:
410 		/* supported, but if AFBC then must be sparse mode */
411 		return (!afbc) || (afbc && sparse);
412 
413 	case DRM_FORMAT_BGR888:
414 		/* supported, but not for AFBC */
415 		return !afbc;
416 
417 	case DRM_FORMAT_YUYV:
418 	case DRM_FORMAT_UYVY:
419 	case DRM_FORMAT_NV12:
420 	case DRM_FORMAT_YUV420:
421 		/* not supported */
422 		return false;
423 
424 	default:
425 		return false;
426 	}
427 }
428 
429 /*
430  * Select the preferred MMU prefetch mode. Full-frame prefetch is preferred as
431  * long as the framebuffer is all large pages. Otherwise partial-frame prefetch
432  * is selected as long as it is supported for the current format. The selected
433  * page size for prefetch is returned in pgsize_bitmap.
434  */
435 static enum mmu_prefetch_mode malidp_mmu_prefetch_select_mode
436 		(struct malidp_plane_state *ms,	u32 *pgsize_bitmap)
437 {
438 	u32 pgsizes;
439 
440 	/* get the full-frame prefetch page size(s) supported by the MMU */
441 	pgsizes = *pgsize_bitmap & MALIDP_MMU_PREFETCH_FULL_PGSIZES;
442 
443 	while (pgsizes) {
444 		u32 largest_pgsize = 1 << __fls(pgsizes);
445 
446 		if (malidp_check_pages_threshold(ms, largest_pgsize)) {
447 			*pgsize_bitmap = largest_pgsize;
448 			return MALIDP_PREFETCH_MODE_FULL;
449 		}
450 
451 		pgsizes -= largest_pgsize;
452 	}
453 
454 	/* get the partial-frame prefetch page size(s) supported by the MMU */
455 	pgsizes = *pgsize_bitmap & MALIDP_MMU_PREFETCH_PARTIAL_PGSIZES;
456 
457 	if (malidp_partial_prefetch_supported(ms->base.fb->format->format,
458 					      ms->base.fb->modifier,
459 					      ms->base.rotation)) {
460 		/* partial prefetch using the smallest page size */
461 		*pgsize_bitmap = 1 << __ffs(pgsizes);
462 		return MALIDP_PREFETCH_MODE_PARTIAL;
463 	}
464 	*pgsize_bitmap = 0;
465 	return MALIDP_PREFETCH_MODE_NONE;
466 }
467 
468 static u32 malidp_calc_mmu_control_value(enum mmu_prefetch_mode mode,
469 					 u8 readahead, u8 n_planes, u32 pgsize)
470 {
471 	u32 mmu_ctrl = 0;
472 
473 	if (mode != MALIDP_PREFETCH_MODE_NONE) {
474 		mmu_ctrl |= MALIDP_MMU_CTRL_EN;
475 
476 		if (mode == MALIDP_PREFETCH_MODE_PARTIAL) {
477 			mmu_ctrl |= MALIDP_MMU_CTRL_MODE;
478 			mmu_ctrl |= MALIDP_MMU_CTRL_PP_NUM_REQ(readahead);
479 		}
480 
481 		if (pgsize == SZ_64K || pgsize == SZ_2M) {
482 			int i;
483 
484 			for (i = 0; i < n_planes; i++)
485 				mmu_ctrl |= MALIDP_MMU_CTRL_PX_PS(i);
486 		}
487 	}
488 
489 	return mmu_ctrl;
490 }
491 
492 static void malidp_de_prefetch_settings(struct malidp_plane *mp,
493 					struct malidp_plane_state *ms)
494 {
495 	if (!mp->layer->mmu_ctrl_offset)
496 		return;
497 
498 	/* get the page sizes supported by the MMU */
499 	ms->mmu_prefetch_pgsize = malidp_get_pgsize_bitmap(mp);
500 	ms->mmu_prefetch_mode  =
501 		malidp_mmu_prefetch_select_mode(ms, &ms->mmu_prefetch_pgsize);
502 }
503 
504 static int malidp_de_plane_check(struct drm_plane *plane,
505 				 struct drm_plane_state *state)
506 {
507 	struct malidp_plane *mp = to_malidp_plane(plane);
508 	struct malidp_plane_state *ms = to_malidp_plane_state(state);
509 	bool rotated = state->rotation & MALIDP_ROTATED_MASK;
510 	struct drm_framebuffer *fb;
511 	u16 pixel_alpha = state->pixel_blend_mode;
512 	int i, ret;
513 	unsigned int block_w, block_h;
514 
515 	if (!state->crtc || WARN_ON(!state->fb))
516 		return 0;
517 
518 	fb = state->fb;
519 
520 	ms->format = malidp_hw_get_format_id(&mp->hwdev->hw->map,
521 					     mp->layer->id, fb->format->format,
522 					     !!fb->modifier);
523 	if (ms->format == MALIDP_INVALID_FORMAT_ID)
524 		return -EINVAL;
525 
526 	ms->n_planes = fb->format->num_planes;
527 	for (i = 0; i < ms->n_planes; i++) {
528 		u8 alignment = malidp_hw_get_pitch_align(mp->hwdev, rotated);
529 
530 		if (((fb->pitches[i] * drm_format_info_block_height(fb->format, i))
531 				& (alignment - 1)) && !(fb->modifier)) {
532 			DRM_DEBUG_KMS("Invalid pitch %u for plane %d\n",
533 				      fb->pitches[i], i);
534 			return -EINVAL;
535 		}
536 	}
537 
538 	block_w = drm_format_info_block_width(fb->format, 0);
539 	block_h = drm_format_info_block_height(fb->format, 0);
540 	if (fb->width % block_w || fb->height % block_h) {
541 		DRM_DEBUG_KMS("Buffer width/height needs to be a multiple of tile sizes");
542 		return -EINVAL;
543 	}
544 	if ((state->src_x >> 16) % block_w || (state->src_y >> 16) % block_h) {
545 		DRM_DEBUG_KMS("Plane src_x/src_y needs to be a multiple of tile sizes");
546 		return -EINVAL;
547 	}
548 
549 	if ((state->crtc_w > mp->hwdev->max_line_size) ||
550 	    (state->crtc_h > mp->hwdev->max_line_size) ||
551 	    (state->crtc_w < mp->hwdev->min_line_size) ||
552 	    (state->crtc_h < mp->hwdev->min_line_size))
553 		return -EINVAL;
554 
555 	/*
556 	 * DP550/650 video layers can accept 3 plane formats only if
557 	 * fb->pitches[1] == fb->pitches[2] since they don't have a
558 	 * third plane stride register.
559 	 */
560 	if (ms->n_planes == 3 &&
561 	    !(mp->hwdev->hw->features & MALIDP_DEVICE_LV_HAS_3_STRIDES) &&
562 	    (state->fb->pitches[1] != state->fb->pitches[2]))
563 		return -EINVAL;
564 
565 	ret = malidp_se_check_scaling(mp, state);
566 	if (ret)
567 		return ret;
568 
569 	/* validate the rotation constraints for each layer */
570 	if (state->rotation != DRM_MODE_ROTATE_0) {
571 		if (mp->layer->rot == ROTATE_NONE)
572 			return -EINVAL;
573 		if ((mp->layer->rot == ROTATE_COMPRESSED) && !(fb->modifier))
574 			return -EINVAL;
575 		/*
576 		 * packed RGB888 / BGR888 can't be rotated or flipped
577 		 * unless they are stored in a compressed way
578 		 */
579 		if ((fb->format->format == DRM_FORMAT_RGB888 ||
580 		     fb->format->format == DRM_FORMAT_BGR888) && !(fb->modifier))
581 			return -EINVAL;
582 	}
583 
584 	/* SMART layer does not support AFBC */
585 	if (mp->layer->id == DE_SMART && fb->modifier) {
586 		DRM_ERROR("AFBC framebuffer not supported in SMART layer");
587 		return -EINVAL;
588 	}
589 
590 	ms->rotmem_size = 0;
591 	if (state->rotation & MALIDP_ROTATED_MASK) {
592 		int val;
593 
594 		val = mp->hwdev->hw->rotmem_required(mp->hwdev, state->crtc_w,
595 						     state->crtc_h,
596 						     fb->format->format,
597 						     !!(fb->modifier));
598 		if (val < 0)
599 			return val;
600 
601 		ms->rotmem_size = val;
602 	}
603 
604 	/* HW can't support plane + pixel blending */
605 	if ((state->alpha != DRM_BLEND_ALPHA_OPAQUE) &&
606 	    (pixel_alpha != DRM_MODE_BLEND_PIXEL_NONE) &&
607 	    fb->format->has_alpha)
608 		return -EINVAL;
609 
610 	malidp_de_prefetch_settings(mp, ms);
611 
612 	return 0;
613 }
614 
615 static void malidp_de_set_plane_pitches(struct malidp_plane *mp,
616 					int num_planes, unsigned int pitches[3])
617 {
618 	int i;
619 	int num_strides = num_planes;
620 
621 	if (!mp->layer->stride_offset)
622 		return;
623 
624 	if (num_planes == 3)
625 		num_strides = (mp->hwdev->hw->features &
626 			       MALIDP_DEVICE_LV_HAS_3_STRIDES) ? 3 : 2;
627 
628 	/*
629 	 * The drm convention for pitch is that it needs to cover width * cpp,
630 	 * but our hardware wants the pitch/stride to cover all rows included
631 	 * in a tile.
632 	 */
633 	for (i = 0; i < num_strides; ++i) {
634 		unsigned int block_h = drm_format_info_block_height(mp->base.state->fb->format, i);
635 
636 		malidp_hw_write(mp->hwdev, pitches[i] * block_h,
637 				mp->layer->base +
638 				mp->layer->stride_offset + i * 4);
639 	}
640 }
641 
642 static const s16
643 malidp_yuv2rgb_coeffs[][DRM_COLOR_RANGE_MAX][MALIDP_COLORADJ_NUM_COEFFS] = {
644 	[DRM_COLOR_YCBCR_BT601][DRM_COLOR_YCBCR_LIMITED_RANGE] = {
645 		1192,    0, 1634,
646 		1192, -401, -832,
647 		1192, 2066,    0,
648 		  64,  512,  512
649 	},
650 	[DRM_COLOR_YCBCR_BT601][DRM_COLOR_YCBCR_FULL_RANGE] = {
651 		1024,    0, 1436,
652 		1024, -352, -731,
653 		1024, 1815,    0,
654 		   0,  512,  512
655 	},
656 	[DRM_COLOR_YCBCR_BT709][DRM_COLOR_YCBCR_LIMITED_RANGE] = {
657 		1192,    0, 1836,
658 		1192, -218, -546,
659 		1192, 2163,    0,
660 		  64,  512,  512
661 	},
662 	[DRM_COLOR_YCBCR_BT709][DRM_COLOR_YCBCR_FULL_RANGE] = {
663 		1024,    0, 1613,
664 		1024, -192, -479,
665 		1024, 1900,    0,
666 		   0,  512,  512
667 	},
668 	[DRM_COLOR_YCBCR_BT2020][DRM_COLOR_YCBCR_LIMITED_RANGE] = {
669 		1024,    0, 1476,
670 		1024, -165, -572,
671 		1024, 1884,    0,
672 		   0,  512,  512
673 	},
674 	[DRM_COLOR_YCBCR_BT2020][DRM_COLOR_YCBCR_FULL_RANGE] = {
675 		1024,    0, 1510,
676 		1024, -168, -585,
677 		1024, 1927,    0,
678 		   0,  512,  512
679 	}
680 };
681 
682 static void malidp_de_set_color_encoding(struct malidp_plane *plane,
683 					 enum drm_color_encoding enc,
684 					 enum drm_color_range range)
685 {
686 	unsigned int i;
687 
688 	for (i = 0; i < MALIDP_COLORADJ_NUM_COEFFS; i++) {
689 		/* coefficients are signed, two's complement values */
690 		malidp_hw_write(plane->hwdev, malidp_yuv2rgb_coeffs[enc][range][i],
691 				plane->layer->base + plane->layer->yuv2rgb_offset +
692 				i * 4);
693 	}
694 }
695 
696 static void malidp_de_set_mmu_control(struct malidp_plane *mp,
697 				      struct malidp_plane_state *ms)
698 {
699 	u32 mmu_ctrl;
700 
701 	/* check hardware supports MMU prefetch */
702 	if (!mp->layer->mmu_ctrl_offset)
703 		return;
704 
705 	mmu_ctrl = malidp_calc_mmu_control_value(ms->mmu_prefetch_mode,
706 						 MALIDP_MMU_PREFETCH_READAHEAD,
707 						 ms->n_planes,
708 						 ms->mmu_prefetch_pgsize);
709 
710 	malidp_hw_write(mp->hwdev, mmu_ctrl,
711 			mp->layer->base + mp->layer->mmu_ctrl_offset);
712 }
713 
714 static void malidp_set_plane_base_addr(struct drm_framebuffer *fb,
715 				       struct malidp_plane *mp,
716 				       int plane_index)
717 {
718 	dma_addr_t paddr;
719 	u16 ptr;
720 	struct drm_plane *plane = &mp->base;
721 	bool afbc = fb->modifier ? true : false;
722 
723 	ptr = mp->layer->ptr + (plane_index << 4);
724 
725 	/*
726 	 * drm_fb_cma_get_gem_addr() alters the physical base address of the
727 	 * framebuffer as per the plane's src_x, src_y co-ordinates (ie to
728 	 * take care of source cropping).
729 	 * For AFBC, this is not needed as the cropping is handled by _AD_CROP_H
730 	 * and _AD_CROP_V registers.
731 	 */
732 	if (!afbc) {
733 		paddr = drm_fb_cma_get_gem_addr(fb, plane->state,
734 						plane_index);
735 	} else {
736 		struct drm_gem_cma_object *obj;
737 
738 		obj = drm_fb_cma_get_gem_obj(fb, plane_index);
739 
740 		if (WARN_ON(!obj))
741 			return;
742 		paddr = obj->paddr;
743 	}
744 
745 	malidp_hw_write(mp->hwdev, lower_32_bits(paddr), ptr);
746 	malidp_hw_write(mp->hwdev, upper_32_bits(paddr), ptr + 4);
747 }
748 
749 static void malidp_de_set_plane_afbc(struct drm_plane *plane)
750 {
751 	struct malidp_plane *mp;
752 	u32 src_w, src_h, val = 0, src_x, src_y;
753 	struct drm_framebuffer *fb = plane->state->fb;
754 
755 	mp = to_malidp_plane(plane);
756 
757 	/* no afbc_decoder_offset means AFBC is not supported on this plane */
758 	if (!mp->layer->afbc_decoder_offset)
759 		return;
760 
761 	if (!fb->modifier) {
762 		malidp_hw_write(mp->hwdev, 0, mp->layer->afbc_decoder_offset);
763 		return;
764 	}
765 
766 	/* convert src values from Q16 fixed point to integer */
767 	src_w = plane->state->src_w >> 16;
768 	src_h = plane->state->src_h >> 16;
769 	src_x = plane->state->src_x >> 16;
770 	src_y = plane->state->src_y >> 16;
771 
772 	val = ((fb->width - (src_x + src_w)) << MALIDP_AD_CROP_RIGHT_OFFSET) |
773 		   src_x;
774 	malidp_hw_write(mp->hwdev, val,
775 			mp->layer->afbc_decoder_offset + MALIDP_AD_CROP_H);
776 
777 	val = ((fb->height - (src_y + src_h)) << MALIDP_AD_CROP_BOTTOM_OFFSET) |
778 		   src_y;
779 	malidp_hw_write(mp->hwdev, val,
780 			mp->layer->afbc_decoder_offset + MALIDP_AD_CROP_V);
781 
782 	val = MALIDP_AD_EN;
783 	if (fb->modifier & AFBC_FORMAT_MOD_SPLIT)
784 		val |= MALIDP_AD_BS;
785 	if (fb->modifier & AFBC_FORMAT_MOD_YTR)
786 		val |= MALIDP_AD_YTR;
787 
788 	malidp_hw_write(mp->hwdev, val, mp->layer->afbc_decoder_offset);
789 }
790 
791 static void malidp_de_plane_update(struct drm_plane *plane,
792 				   struct drm_plane_state *old_state)
793 {
794 	struct malidp_plane *mp;
795 	struct malidp_plane_state *ms = to_malidp_plane_state(plane->state);
796 	struct drm_plane_state *state = plane->state;
797 	u16 pixel_alpha = state->pixel_blend_mode;
798 	u8 plane_alpha = state->alpha >> 8;
799 	u32 src_w, src_h, dest_w, dest_h, val;
800 	int i;
801 	struct drm_framebuffer *fb = plane->state->fb;
802 
803 	mp = to_malidp_plane(plane);
804 
805 	/*
806 	 * For AFBC framebuffer, use the framebuffer width and height for
807 	 * configuring layer input size register.
808 	 */
809 	if (fb->modifier) {
810 		src_w = fb->width;
811 		src_h = fb->height;
812 	} else {
813 		/* convert src values from Q16 fixed point to integer */
814 		src_w = state->src_w >> 16;
815 		src_h = state->src_h >> 16;
816 	}
817 
818 	dest_w = state->crtc_w;
819 	dest_h = state->crtc_h;
820 
821 	val = malidp_hw_read(mp->hwdev, mp->layer->base);
822 	val = (val & ~LAYER_FORMAT_MASK) | ms->format;
823 	malidp_hw_write(mp->hwdev, val, mp->layer->base);
824 
825 	for (i = 0; i < ms->n_planes; i++)
826 		malidp_set_plane_base_addr(fb, mp, i);
827 
828 	malidp_de_set_mmu_control(mp, ms);
829 
830 	malidp_de_set_plane_pitches(mp, ms->n_planes,
831 				    state->fb->pitches);
832 
833 	if ((plane->state->color_encoding != old_state->color_encoding) ||
834 	    (plane->state->color_range != old_state->color_range))
835 		malidp_de_set_color_encoding(mp, plane->state->color_encoding,
836 					     plane->state->color_range);
837 
838 	malidp_hw_write(mp->hwdev, LAYER_H_VAL(src_w) | LAYER_V_VAL(src_h),
839 			mp->layer->base + MALIDP_LAYER_SIZE);
840 
841 	malidp_hw_write(mp->hwdev, LAYER_H_VAL(dest_w) | LAYER_V_VAL(dest_h),
842 			mp->layer->base + MALIDP_LAYER_COMP_SIZE);
843 
844 	malidp_hw_write(mp->hwdev, LAYER_H_VAL(state->crtc_x) |
845 			LAYER_V_VAL(state->crtc_y),
846 			mp->layer->base + MALIDP_LAYER_OFFSET);
847 
848 	if (mp->layer->id == DE_SMART) {
849 		/*
850 		 * Enable the first rectangle in the SMART layer to be
851 		 * able to use it as a drm plane.
852 		 */
853 		malidp_hw_write(mp->hwdev, 1,
854 				mp->layer->base + MALIDP550_LS_ENABLE);
855 		malidp_hw_write(mp->hwdev,
856 				LAYER_H_VAL(src_w) | LAYER_V_VAL(src_h),
857 				mp->layer->base + MALIDP550_LS_R1_IN_SIZE);
858 	}
859 
860 	malidp_de_set_plane_afbc(plane);
861 
862 	/* first clear the rotation bits */
863 	val = malidp_hw_read(mp->hwdev, mp->layer->base + MALIDP_LAYER_CONTROL);
864 	val &= ~LAYER_ROT_MASK;
865 
866 	/* setup the rotation and axis flip bits */
867 	if (state->rotation & DRM_MODE_ROTATE_MASK)
868 		val |= ilog2(plane->state->rotation & DRM_MODE_ROTATE_MASK) <<
869 		       LAYER_ROT_OFFSET;
870 	if (state->rotation & DRM_MODE_REFLECT_X)
871 		val |= LAYER_H_FLIP;
872 	if (state->rotation & DRM_MODE_REFLECT_Y)
873 		val |= LAYER_V_FLIP;
874 
875 	val &= ~(LAYER_COMP_MASK | LAYER_PMUL_ENABLE | LAYER_ALPHA(0xff));
876 
877 	if (state->alpha != DRM_BLEND_ALPHA_OPAQUE) {
878 		val |= LAYER_COMP_PLANE;
879 	} else if (state->fb->format->has_alpha) {
880 		/* We only care about blend mode if the format has alpha */
881 		switch (pixel_alpha) {
882 		case DRM_MODE_BLEND_PREMULTI:
883 			val |= LAYER_COMP_PIXEL | LAYER_PMUL_ENABLE;
884 			break;
885 		case DRM_MODE_BLEND_COVERAGE:
886 			val |= LAYER_COMP_PIXEL;
887 			break;
888 		}
889 	}
890 	val |= LAYER_ALPHA(plane_alpha);
891 
892 	val &= ~LAYER_FLOWCFG(LAYER_FLOWCFG_MASK);
893 	if (state->crtc) {
894 		struct malidp_crtc_state *m =
895 			to_malidp_crtc_state(state->crtc->state);
896 
897 		if (m->scaler_config.scale_enable &&
898 		    m->scaler_config.plane_src_id == mp->layer->id)
899 			val |= LAYER_FLOWCFG(LAYER_FLOWCFG_SCALE_SE);
900 	}
901 
902 	/* set the 'enable layer' bit */
903 	val |= LAYER_ENABLE;
904 
905 	malidp_hw_write(mp->hwdev, val,
906 			mp->layer->base + MALIDP_LAYER_CONTROL);
907 }
908 
909 static void malidp_de_plane_disable(struct drm_plane *plane,
910 				    struct drm_plane_state *state)
911 {
912 	struct malidp_plane *mp = to_malidp_plane(plane);
913 
914 	malidp_hw_clearbits(mp->hwdev,
915 			    LAYER_ENABLE | LAYER_FLOWCFG(LAYER_FLOWCFG_MASK),
916 			    mp->layer->base + MALIDP_LAYER_CONTROL);
917 }
918 
919 static const struct drm_plane_helper_funcs malidp_de_plane_helper_funcs = {
920 	.atomic_check = malidp_de_plane_check,
921 	.atomic_update = malidp_de_plane_update,
922 	.atomic_disable = malidp_de_plane_disable,
923 };
924 
925 int malidp_de_planes_init(struct drm_device *drm)
926 {
927 	struct malidp_drm *malidp = drm->dev_private;
928 	const struct malidp_hw_regmap *map = &malidp->dev->hw->map;
929 	struct malidp_plane *plane = NULL;
930 	enum drm_plane_type plane_type;
931 	unsigned long crtcs = BIT(drm->mode_config.num_crtc);
932 	unsigned long flags = DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_180 |
933 			      DRM_MODE_ROTATE_270 | DRM_MODE_REFLECT_X | DRM_MODE_REFLECT_Y;
934 	unsigned int blend_caps = BIT(DRM_MODE_BLEND_PIXEL_NONE) |
935 				  BIT(DRM_MODE_BLEND_PREMULTI)   |
936 				  BIT(DRM_MODE_BLEND_COVERAGE);
937 	u32 *formats;
938 	int ret, i = 0, j = 0, n;
939 	u64 supported_modifiers[MODIFIERS_COUNT_MAX];
940 	const u64 *modifiers;
941 
942 	modifiers = malidp_format_modifiers;
943 
944 	if (!(map->features & MALIDP_DEVICE_AFBC_SUPPORT_SPLIT)) {
945 		/*
946 		 * Since our hardware does not support SPLIT, so build the list
947 		 * of supported modifiers excluding SPLIT ones.
948 		 */
949 		while (*modifiers != DRM_FORMAT_MOD_INVALID) {
950 			if (!(*modifiers & AFBC_SPLIT))
951 				supported_modifiers[j++] = *modifiers;
952 
953 			modifiers++;
954 		}
955 		supported_modifiers[j++] = DRM_FORMAT_MOD_INVALID;
956 		modifiers = supported_modifiers;
957 	}
958 
959 	formats = kcalloc(map->n_pixel_formats, sizeof(*formats), GFP_KERNEL);
960 	if (!formats) {
961 		ret = -ENOMEM;
962 		goto cleanup;
963 	}
964 
965 	for (i = 0; i < map->n_layers; i++) {
966 		u8 id = map->layers[i].id;
967 
968 		plane = kzalloc(sizeof(*plane), GFP_KERNEL);
969 		if (!plane) {
970 			ret = -ENOMEM;
971 			goto cleanup;
972 		}
973 
974 		/* build the list of DRM supported formats based on the map */
975 		for (n = 0, j = 0;  j < map->n_pixel_formats; j++) {
976 			if ((map->pixel_formats[j].layer & id) == id)
977 				formats[n++] = map->pixel_formats[j].format;
978 		}
979 
980 		plane_type = (i == 0) ? DRM_PLANE_TYPE_PRIMARY :
981 					DRM_PLANE_TYPE_OVERLAY;
982 
983 		/*
984 		 * All the layers except smart layer supports AFBC modifiers.
985 		 */
986 		ret = drm_universal_plane_init(drm, &plane->base, crtcs,
987 				&malidp_de_plane_funcs, formats, n,
988 				(id == DE_SMART) ? NULL : modifiers, plane_type,
989 				NULL);
990 
991 		if (ret < 0)
992 			goto cleanup;
993 
994 		drm_plane_helper_add(&plane->base,
995 				     &malidp_de_plane_helper_funcs);
996 		plane->hwdev = malidp->dev;
997 		plane->layer = &map->layers[i];
998 
999 		drm_plane_create_alpha_property(&plane->base);
1000 		drm_plane_create_blend_mode_property(&plane->base, blend_caps);
1001 
1002 		if (id == DE_SMART) {
1003 			/* Skip the features which the SMART layer doesn't have. */
1004 			continue;
1005 		}
1006 
1007 		drm_plane_create_rotation_property(&plane->base, DRM_MODE_ROTATE_0, flags);
1008 		malidp_hw_write(malidp->dev, MALIDP_ALPHA_LUT,
1009 				plane->layer->base + MALIDP_LAYER_COMPOSE);
1010 
1011 		/* Attach the YUV->RGB property only to video layers */
1012 		if (id & (DE_VIDEO1 | DE_VIDEO2)) {
1013 			/* default encoding for YUV->RGB is BT601 NARROW */
1014 			enum drm_color_encoding enc = DRM_COLOR_YCBCR_BT601;
1015 			enum drm_color_range range = DRM_COLOR_YCBCR_LIMITED_RANGE;
1016 
1017 			ret = drm_plane_create_color_properties(&plane->base,
1018 					BIT(DRM_COLOR_YCBCR_BT601) | \
1019 					BIT(DRM_COLOR_YCBCR_BT709) | \
1020 					BIT(DRM_COLOR_YCBCR_BT2020),
1021 					BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) | \
1022 					BIT(DRM_COLOR_YCBCR_FULL_RANGE),
1023 					enc, range);
1024 			if (!ret)
1025 				/* program the HW registers */
1026 				malidp_de_set_color_encoding(plane, enc, range);
1027 			else
1028 				DRM_WARN("Failed to create video layer %d color properties\n", id);
1029 		}
1030 	}
1031 
1032 	kfree(formats);
1033 
1034 	return 0;
1035 
1036 cleanup:
1037 	kfree(formats);
1038 
1039 	return ret;
1040 }
1041