xref: /netbsd-src/sys/external/bsd/drm2/dist/drm/nouveau/nvkm/subdev/bios/nouveau_nvkm_subdev_bios_disp.c (revision 41ec02673d281bbb3d38e6c78504ce6e30c228c1)
1 /*	$NetBSD: nouveau_nvkm_subdev_bios_disp.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $	*/
2 
3 /*
4  * Copyright 2012 Red Hat Inc.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22  * OTHER DEALINGS IN THE SOFTWARE.
23  *
24  * Authors: Ben Skeggs
25  */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bios_disp.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $");
28 
29 #include <subdev/bios.h>
30 #include <subdev/bios/bit.h>
31 #include <subdev/bios/disp.h>
32 
33 u16
nvbios_disp_table(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,u8 * sub)34 nvbios_disp_table(struct nvkm_bios *bios,
35 		  u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *sub)
36 {
37 	struct bit_entry U;
38 
39 	if (!bit_entry(bios, 'U', &U)) {
40 		if (U.version == 1) {
41 			u16 data = nvbios_rd16(bios, U.offset);
42 			if (data) {
43 				*ver = nvbios_rd08(bios, data + 0x00);
44 				switch (*ver) {
45 				case 0x20:
46 				case 0x21:
47 				case 0x22:
48 					*hdr = nvbios_rd08(bios, data + 0x01);
49 					*len = nvbios_rd08(bios, data + 0x02);
50 					*cnt = nvbios_rd08(bios, data + 0x03);
51 					*sub = nvbios_rd08(bios, data + 0x04);
52 					return data;
53 				default:
54 					break;
55 				}
56 			}
57 		}
58 	}
59 
60 	return 0x0000;
61 }
62 
63 u16
nvbios_disp_entry(struct nvkm_bios * bios,u8 idx,u8 * ver,u8 * len,u8 * sub)64 nvbios_disp_entry(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len, u8 *sub)
65 {
66 	u8  hdr, cnt;
67 	u16 data = nvbios_disp_table(bios, ver, &hdr, &cnt, len, sub);
68 	if (data && idx < cnt)
69 		return data + hdr + (idx * *len);
70 	*ver = 0x00;
71 	return 0x0000;
72 }
73 
74 u16
nvbios_disp_parse(struct nvkm_bios * bios,u8 idx,u8 * ver,u8 * len,u8 * sub,struct nvbios_disp * info)75 nvbios_disp_parse(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len, u8 *sub,
76 		  struct nvbios_disp *info)
77 {
78 	u16 data = nvbios_disp_entry(bios, idx, ver, len, sub);
79 	if (data && *len >= 2) {
80 		info->data = nvbios_rd16(bios, data + 0);
81 		return data;
82 	}
83 	return 0x0000;
84 }
85 
86 u16
nvbios_outp_entry(struct nvkm_bios * bios,u8 idx,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)87 nvbios_outp_entry(struct nvkm_bios *bios, u8 idx,
88 		  u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
89 {
90 	struct nvbios_disp info;
91 	u16 data = nvbios_disp_parse(bios, idx, ver, len, hdr, &info);
92 	if (data) {
93 		*cnt = nvbios_rd08(bios, info.data + 0x05);
94 		*len = 0x06;
95 		data = info.data;
96 	}
97 	return data;
98 }
99 
100 u16
nvbios_outp_parse(struct nvkm_bios * bios,u8 idx,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,struct nvbios_outp * info)101 nvbios_outp_parse(struct nvkm_bios *bios, u8 idx,
102 		  u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_outp *info)
103 {
104 	u16 data = nvbios_outp_entry(bios, idx, ver, hdr, cnt, len);
105 	if (data && *hdr >= 0x0a) {
106 		info->type      = nvbios_rd16(bios, data + 0x00);
107 		info->mask      = nvbios_rd32(bios, data + 0x02);
108 		if (*ver <= 0x20) /* match any link */
109 			info->mask |= 0x00c0;
110 		info->script[0] = nvbios_rd16(bios, data + 0x06);
111 		info->script[1] = nvbios_rd16(bios, data + 0x08);
112 		info->script[2] = 0x0000;
113 		if (*hdr >= 0x0c)
114 			info->script[2] = nvbios_rd16(bios, data + 0x0a);
115 		return data;
116 	}
117 	return 0x0000;
118 }
119 
120 u16
nvbios_outp_match(struct nvkm_bios * bios,u16 type,u16 mask,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,struct nvbios_outp * info)121 nvbios_outp_match(struct nvkm_bios *bios, u16 type, u16 mask,
122 		  u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_outp *info)
123 {
124 	u16 data, idx = 0;
125 	while ((data = nvbios_outp_parse(bios, idx++, ver, hdr, cnt, len, info)) || *ver) {
126 		if (data && info->type == type) {
127 			if ((info->mask & mask) == mask)
128 				break;
129 		}
130 	}
131 	return data;
132 }
133 
134 u16
nvbios_ocfg_entry(struct nvkm_bios * bios,u16 outp,u8 idx,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)135 nvbios_ocfg_entry(struct nvkm_bios *bios, u16 outp, u8 idx,
136 		  u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
137 {
138 	if (idx < *cnt)
139 		return outp + *hdr + (idx * *len);
140 	return 0x0000;
141 }
142 
143 u16
nvbios_ocfg_parse(struct nvkm_bios * bios,u16 outp,u8 idx,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,struct nvbios_ocfg * info)144 nvbios_ocfg_parse(struct nvkm_bios *bios, u16 outp, u8 idx,
145 		  u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_ocfg *info)
146 {
147 	u16 data = nvbios_ocfg_entry(bios, outp, idx, ver, hdr, cnt, len);
148 	if (data) {
149 		info->proto     = nvbios_rd08(bios, data + 0x00);
150 		info->flags     = nvbios_rd16(bios, data + 0x01);
151 		info->clkcmp[0] = nvbios_rd16(bios, data + 0x02);
152 		info->clkcmp[1] = nvbios_rd16(bios, data + 0x04);
153 	}
154 	return data;
155 }
156 
157 u16
nvbios_ocfg_match(struct nvkm_bios * bios,u16 outp,u8 proto,u8 flags,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,struct nvbios_ocfg * info)158 nvbios_ocfg_match(struct nvkm_bios *bios, u16 outp, u8 proto, u8 flags,
159 		  u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_ocfg *info)
160 {
161 	u16 data, idx = 0;
162 	while ((data = nvbios_ocfg_parse(bios, outp, idx++, ver, hdr, cnt, len, info))) {
163 		if ((info->proto == proto || info->proto == 0xff) &&
164 		    (info->flags == flags))
165 			break;
166 	}
167 	return data;
168 }
169 
170 u16
nvbios_oclk_match(struct nvkm_bios * bios,u16 cmp,u32 khz)171 nvbios_oclk_match(struct nvkm_bios *bios, u16 cmp, u32 khz)
172 {
173 	while (cmp) {
174 		if (khz / 10 >= nvbios_rd16(bios, cmp + 0x00))
175 			return  nvbios_rd16(bios, cmp + 0x02);
176 		cmp += 0x04;
177 	}
178 	return 0x0000;
179 }
180