1/* 2 * Copyright 2012 Red Hat Inc. 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 shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Ben Skeggs 23 */ 24#include <subdev/bios.h> 25#include <subdev/bios/dcb.h> 26 27u16 28dcb_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) 29{ 30 struct nvkm_subdev *subdev = &bios->subdev; 31 struct nvkm_device *device = subdev->device; 32 u16 dcb = 0x0000; 33 34 if (device->card_type > NV_04) 35 dcb = nvbios_rd16(bios, 0x36); 36 if (!dcb) { 37 nvkm_warn(subdev, "DCB table not found\n"); 38 return dcb; 39 } 40 41 *ver = nvbios_rd08(bios, dcb); 42 43 if (*ver >= 0x42) { 44 nvkm_warn(subdev, "DCB version 0x%02x unknown\n", *ver); 45 return 0x0000; 46 } else 47 if (*ver >= 0x30) { 48 if (nvbios_rd32(bios, dcb + 6) == 0x4edcbdcb) { 49 *hdr = nvbios_rd08(bios, dcb + 1); 50 *cnt = nvbios_rd08(bios, dcb + 2); 51 *len = nvbios_rd08(bios, dcb + 3); 52 return dcb; 53 } 54 } else 55 if (*ver >= 0x20) { 56 if (nvbios_rd32(bios, dcb + 4) == 0x4edcbdcb) { 57 u16 i2c = nvbios_rd16(bios, dcb + 2); 58 *hdr = 8; 59 *cnt = (i2c - dcb) / 8; 60 *len = 8; 61 return dcb; 62 } 63 } else 64 if (*ver >= 0x15) { 65 if (!nvbios_memcmp(bios, dcb - 7, "DEV_REC", 7)) { 66 u16 i2c = nvbios_rd16(bios, dcb + 2); 67 *hdr = 4; 68 *cnt = (i2c - dcb) / 10; 69 *len = 10; 70 return dcb; 71 } 72 } else { 73 /* 74 * v1.4 (some NV15/16, NV11+) seems the same as v1.5, but 75 * always has the same single (crt) entry, even when tv-out 76 * present, so the conclusion is this version cannot really 77 * be used. 78 * 79 * v1.2 tables (some NV6/10, and NV15+) normally have the 80 * same 5 entries, which are not specific to the card and so 81 * no use. 82 * 83 * v1.2 does have an I2C table that read_dcb_i2c_table can 84 * handle, but cards exist (nv11 in #14821) with a bad i2c 85 * table pointer, so use the indices parsed in 86 * parse_bmp_structure. 87 * 88 * v1.1 (NV5+, maybe some NV4) is entirely unhelpful 89 */ 90 nvkm_debug(subdev, "DCB contains no useful data\n"); 91 return 0x0000; 92 } 93 94 nvkm_warn(subdev, "DCB header validation failed\n"); 95 return 0x0000; 96} 97 98u16 99dcb_outp(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len) 100{ 101 u8 hdr, cnt; 102 u16 dcb = dcb_table(bios, ver, &hdr, &cnt, len); 103 if (dcb && idx < cnt) 104 return dcb + hdr + (idx * *len); 105 return 0x0000; 106} 107 108static inline u16 109dcb_outp_hasht(struct dcb_output *outp) 110{ 111 return (outp->extdev << 8) | (outp->location << 4) | outp->type; 112} 113 114static inline u16 115dcb_outp_hashm(struct dcb_output *outp) 116{ 117 return (outp->heads << 8) | (outp->link << 6) | outp->or; 118} 119 120u16 121dcb_outp_parse(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len, 122 struct dcb_output *outp) 123{ 124 u16 dcb = dcb_outp(bios, idx, ver, len); 125 memset(outp, 0x00, sizeof(*outp)); 126 if (dcb) { 127 if (*ver >= 0x20) { 128 u32 conn = nvbios_rd32(bios, dcb + 0x00); 129 outp->or = (conn & 0x0f000000) >> 24; 130 outp->location = (conn & 0x00300000) >> 20; 131 outp->bus = (conn & 0x000f0000) >> 16; 132 outp->connector = (conn & 0x0000f000) >> 12; 133 outp->heads = (conn & 0x00000f00) >> 8; 134 outp->i2c_index = (conn & 0x000000f0) >> 4; 135 outp->type = (conn & 0x0000000f); 136 outp->link = 0; 137 } else { 138 dcb = 0x0000; 139 } 140 141 if (*ver >= 0x40) { 142 u32 conf = nvbios_rd32(bios, dcb + 0x04); 143 switch (outp->type) { 144 case DCB_OUTPUT_DP: 145 switch (conf & 0x00e00000) { 146 case 0x00000000: /* 1.62 */ 147 outp->dpconf.link_bw = 0x06; 148 break; 149 case 0x00200000: /* 2.7 */ 150 outp->dpconf.link_bw = 0x0a; 151 break; 152 case 0x00400000: /* 5.4 */ 153 outp->dpconf.link_bw = 0x14; 154 break; 155 case 0x00600000: /* 8.1 */ 156 default: 157 outp->dpconf.link_bw = 0x1e; 158 break; 159 } 160 161 switch ((conf & 0x0f000000) >> 24) { 162 case 0xf: 163 case 0x4: 164 outp->dpconf.link_nr = 4; 165 break; 166 case 0x3: 167 case 0x2: 168 outp->dpconf.link_nr = 2; 169 break; 170 case 0x1: 171 default: 172 outp->dpconf.link_nr = 1; 173 break; 174 } 175 fallthrough; 176 177 case DCB_OUTPUT_TMDS: 178 case DCB_OUTPUT_LVDS: 179 outp->link = (conf & 0x00000030) >> 4; 180 outp->sorconf.link = outp->link; /*XXX*/ 181 outp->extdev = 0x00; 182 if (outp->location != 0) 183 outp->extdev = (conf & 0x0000ff00) >> 8; 184 break; 185 default: 186 break; 187 } 188 } 189 190 outp->hasht = dcb_outp_hasht(outp); 191 outp->hashm = dcb_outp_hashm(outp); 192 } 193 return dcb; 194} 195 196u16 197dcb_outp_match(struct nvkm_bios *bios, u16 type, u16 mask, 198 u8 *ver, u8 *len, struct dcb_output *outp) 199{ 200 u16 dcb, idx = 0; 201 while ((dcb = dcb_outp_parse(bios, idx++, ver, len, outp))) { 202 if ((dcb_outp_hasht(outp) & 0x00ff) == (type & 0x00ff)) { 203 if ((dcb_outp_hashm(outp) & mask) == mask) 204 break; 205 } 206 } 207 return dcb; 208} 209 210int 211dcb_outp_foreach(struct nvkm_bios *bios, void *data, 212 int (*exec)(struct nvkm_bios *, void *, int, u16)) 213{ 214 int ret, idx = -1; 215 u8 ver, len; 216 u16 outp; 217 218 while ((outp = dcb_outp(bios, ++idx, &ver, &len))) { 219 if (nvbios_rd32(bios, outp) == 0x00000000) 220 break; /* seen on an NV11 with DCB v1.5 */ 221 if (nvbios_rd32(bios, outp) == 0xffffffff) 222 break; /* seen on an NV17 with DCB v2.0 */ 223 224 if (nvbios_rd08(bios, outp) == DCB_OUTPUT_UNUSED) 225 continue; 226 if (nvbios_rd08(bios, outp) == DCB_OUTPUT_EOL) 227 break; 228 229 ret = exec(bios, data, idx, outp); 230 if (ret) 231 return ret; 232 } 233 234 return 0; 235} 236