1// SPDX-License-Identifier: GPL-2.0
2/*
3 * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
4 * Author: James.Qian.Wang <james.qian.wang@arm.com>
5 *
6 */
7
8#include <linux/slab.h>
9#include "komeda_format_caps.h"
10#include "malidp_utils.h"
11
12const struct komeda_format_caps *
13komeda_get_format_caps(struct komeda_format_caps_table *table,
14		       u32 fourcc, u64 modifier)
15{
16	const struct komeda_format_caps *caps;
17	u64 afbc_features = modifier & ~(AFBC_FORMAT_MOD_BLOCK_SIZE_MASK);
18	u32 afbc_layout = modifier & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK;
19	int id;
20
21	for (id = 0; id < table->n_formats; id++) {
22		caps = &table->format_caps[id];
23
24		if (fourcc != caps->fourcc)
25			continue;
26
27		if ((modifier == 0ULL) && (caps->supported_afbc_layouts == 0))
28			return caps;
29
30		if (has_bits(afbc_features, caps->supported_afbc_features) &&
31		    has_bit(afbc_layout, caps->supported_afbc_layouts))
32			return caps;
33	}
34
35	return NULL;
36}
37
38u32 komeda_get_afbc_format_bpp(const struct drm_format_info *info, u64 modifier)
39{
40	u32 bpp;
41
42	switch (info->format) {
43	case DRM_FORMAT_YUV420_8BIT:
44		bpp = 12;
45		break;
46	case DRM_FORMAT_YUV420_10BIT:
47		bpp = 15;
48		break;
49	default:
50		bpp = info->cpp[0] * 8;
51		break;
52	}
53
54	return bpp;
55}
56
57/* Two assumptions
58 * 1. RGB always has YTR
59 * 2. Tiled RGB always has SC
60 */
61u64 komeda_supported_modifiers[] = {
62	/* AFBC_16x16 + features: YUV+RGB both */
63	AFBC_16x16(0),
64	/* SPARSE */
65	AFBC_16x16(_SPARSE),
66	/* YTR + (SPARSE) */
67	AFBC_16x16(_YTR | _SPARSE),
68	AFBC_16x16(_YTR),
69	/* SPLIT + SPARSE + YTR RGB only */
70	/* split mode is only allowed for sparse mode */
71	AFBC_16x16(_SPLIT | _SPARSE | _YTR),
72	/* TILED + (SPARSE) */
73	/* TILED YUV format only */
74	AFBC_16x16(_TILED | _SPARSE),
75	AFBC_16x16(_TILED),
76	/* TILED + SC + (SPLIT+SPARSE | SPARSE) + (YTR) */
77	AFBC_16x16(_TILED | _SC | _SPLIT | _SPARSE | _YTR),
78	AFBC_16x16(_TILED | _SC | _SPARSE | _YTR),
79	AFBC_16x16(_TILED | _SC | _YTR),
80	/* AFBC_32x8 + features: which are RGB formats only */
81	/* YTR + (SPARSE) */
82	AFBC_32x8(_YTR | _SPARSE),
83	AFBC_32x8(_YTR),
84	/* SPLIT + SPARSE + (YTR) */
85	/* split mode is only allowed for sparse mode */
86	AFBC_32x8(_SPLIT | _SPARSE | _YTR),
87	/* TILED + SC + (SPLIT+SPARSE | SPARSE) + YTR */
88	AFBC_32x8(_TILED | _SC | _SPLIT | _SPARSE | _YTR),
89	AFBC_32x8(_TILED | _SC | _SPARSE | _YTR),
90	AFBC_32x8(_TILED | _SC | _YTR),
91	DRM_FORMAT_MOD_LINEAR,
92	DRM_FORMAT_MOD_INVALID
93};
94
95bool komeda_format_mod_supported(struct komeda_format_caps_table *table,
96				 u32 layer_type, u32 fourcc, u64 modifier,
97				 u32 rot)
98{
99	const struct komeda_format_caps *caps;
100
101	caps = komeda_get_format_caps(table, fourcc, modifier);
102	if (!caps)
103		return false;
104
105	if (!(caps->supported_layer_types & layer_type))
106		return false;
107
108	if (table->format_mod_supported)
109		return table->format_mod_supported(caps, layer_type, modifier,
110						   rot);
111
112	return true;
113}
114
115u32 *komeda_get_layer_fourcc_list(struct komeda_format_caps_table *table,
116				  u32 layer_type, u32 *n_fmts)
117{
118	const struct komeda_format_caps *cap;
119	u32 *fmts;
120	int i, j, n = 0;
121
122	fmts = kcalloc(table->n_formats, sizeof(u32), GFP_KERNEL);
123	if (!fmts)
124		return NULL;
125
126	for (i = 0; i < table->n_formats; i++) {
127		cap = &table->format_caps[i];
128		if (!(layer_type & cap->supported_layer_types) ||
129		    (cap->fourcc == 0))
130			continue;
131
132		/* one fourcc may has two caps items in table (afbc/none-afbc),
133		 * so check the existing list to avoid adding a duplicated one.
134		 */
135		for (j = n - 1; j >= 0; j--)
136			if (fmts[j] == cap->fourcc)
137				break;
138
139		if (j < 0)
140			fmts[n++] = cap->fourcc;
141	}
142
143	if (n_fmts)
144		*n_fmts = n;
145
146	return fmts;
147}
148
149void komeda_put_fourcc_list(u32 *fourcc_list)
150{
151	kfree(fourcc_list);
152}
153