1 /* 2 * Copyright 2014 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 "outp.h" 25 #include "ior.h" 26 27 #include <subdev/bios.h> 28 #include <subdev/bios/dcb.h> 29 #include <subdev/i2c.h> 30 31 void 32 nvkm_outp_route(struct nvkm_disp *disp) 33 { 34 struct nvkm_outp *outp; 35 struct nvkm_ior *ior; 36 37 list_for_each_entry(ior, &disp->ior, head) { 38 if ((outp = ior->arm.outp) && ior->arm.outp != ior->asy.outp) { 39 OUTP_DBG(outp, "release %s", ior->name); 40 if (ior->func->route.set) 41 ior->func->route.set(outp, NULL); 42 ior->arm.outp = NULL; 43 } 44 } 45 46 list_for_each_entry(ior, &disp->ior, head) { 47 if ((outp = ior->asy.outp)) { 48 OUTP_DBG(outp, "acquire %s", ior->name); 49 if (ior->asy.outp != ior->arm.outp) { 50 if (ior->func->route.set) 51 ior->func->route.set(outp, ior); 52 ior->arm.outp = ior->asy.outp; 53 } 54 } 55 } 56 } 57 58 static enum nvkm_ior_proto 59 nvkm_outp_xlat(struct nvkm_outp *outp, enum nvkm_ior_type *type) 60 { 61 switch (outp->info.location) { 62 case 0: 63 switch (outp->info.type) { 64 case DCB_OUTPUT_ANALOG: *type = DAC; return CRT; 65 case DCB_OUTPUT_TV : *type = DAC; return TV; 66 case DCB_OUTPUT_TMDS : *type = SOR; return TMDS; 67 case DCB_OUTPUT_LVDS : *type = SOR; return LVDS; 68 case DCB_OUTPUT_DP : *type = SOR; return DP; 69 default: 70 break; 71 } 72 break; 73 case 1: 74 switch (outp->info.type) { 75 case DCB_OUTPUT_TMDS: *type = PIOR; return TMDS; 76 case DCB_OUTPUT_DP : *type = PIOR; return TMDS; /* not a bug */ 77 default: 78 break; 79 } 80 break; 81 default: 82 break; 83 } 84 WARN_ON(1); 85 return UNKNOWN; 86 } 87 88 void 89 nvkm_outp_release(struct nvkm_outp *outp, u8 user) 90 { 91 struct nvkm_ior *ior = outp->ior; 92 OUTP_TRACE(outp, "release %02x &= %02x %p", outp->acquired, ~user, ior); 93 if (ior) { 94 outp->acquired &= ~user; 95 if (!outp->acquired) { 96 outp->ior->asy.outp = NULL; 97 outp->ior = NULL; 98 } 99 } 100 } 101 102 static inline int 103 nvkm_outp_acquire_ior(struct nvkm_outp *outp, u8 user, struct nvkm_ior *ior) 104 { 105 outp->ior = ior; 106 outp->ior->asy.outp = outp; 107 outp->ior->asy.link = outp->info.sorconf.link; 108 outp->acquired |= user; 109 return 0; 110 } 111 112 int 113 nvkm_outp_acquire(struct nvkm_outp *outp, u8 user) 114 { 115 struct nvkm_ior *ior = outp->ior; 116 enum nvkm_ior_proto proto; 117 enum nvkm_ior_type type; 118 119 OUTP_TRACE(outp, "acquire %02x |= %02x %p", outp->acquired, user, ior); 120 if (ior) { 121 outp->acquired |= user; 122 return 0; 123 } 124 125 /* Lookup a compatible, and unused, OR to assign to the device. */ 126 proto = nvkm_outp_xlat(outp, &type); 127 if (proto == UNKNOWN) 128 return -ENOSYS; 129 130 /* First preference is to reuse the OR that is currently armed 131 * on HW, if any, in order to prevent unnecessary switching. 132 */ 133 list_for_each_entry(ior, &outp->disp->ior, head) { 134 if (!ior->asy.outp && ior->arm.outp == outp) 135 return nvkm_outp_acquire_ior(outp, user, ior); 136 } 137 138 /* Failing that, a completely unused OR is the next best thing. */ 139 list_for_each_entry(ior, &outp->disp->ior, head) { 140 if (!ior->asy.outp && ior->type == type && !ior->arm.outp && 141 (ior->func->route.set || ior->id == __ffs(outp->info.or))) 142 return nvkm_outp_acquire_ior(outp, user, ior); 143 } 144 145 /* Last resort is to assign an OR that's already active on HW, 146 * but will be released during the next modeset. 147 */ 148 list_for_each_entry(ior, &outp->disp->ior, head) { 149 if (!ior->asy.outp && ior->type == type && 150 (ior->func->route.set || ior->id == __ffs(outp->info.or))) 151 return nvkm_outp_acquire_ior(outp, user, ior); 152 } 153 154 return -ENOSPC; 155 } 156 157 void 158 nvkm_outp_fini(struct nvkm_outp *outp) 159 { 160 if (outp->func->fini) 161 outp->func->fini(outp); 162 } 163 164 static void 165 nvkm_outp_init_route(struct nvkm_outp *outp) 166 { 167 struct nvkm_disp *disp = outp->disp; 168 enum nvkm_ior_proto proto; 169 enum nvkm_ior_type type; 170 struct nvkm_ior *ior; 171 int id, link; 172 173 /* Find any OR from the class that is able to support this device. */ 174 proto = nvkm_outp_xlat(outp, &type); 175 if (proto == UNKNOWN) 176 return; 177 178 ior = nvkm_ior_find(disp, type, -1); 179 if (!ior) { 180 WARN_ON(1); 181 return; 182 } 183 184 /* Determine the specific OR, if any, this device is attached to. */ 185 if (ior->func->route.get) { 186 id = ior->func->route.get(outp, &link); 187 if (id < 0) { 188 OUTP_DBG(outp, "no route"); 189 return; 190 } 191 } else { 192 /* Prior to DCB 4.1, this is hardwired like so. */ 193 id = ffs(outp->info.or) - 1; 194 link = (ior->type == SOR) ? outp->info.sorconf.link : 0; 195 } 196 197 ior = nvkm_ior_find(disp, type, id); 198 if (!ior) { 199 WARN_ON(1); 200 return; 201 } 202 203 /* Determine if the OR is already configured for this device. */ 204 ior->func->state(ior, &ior->arm); 205 if (!ior->arm.head || ior->arm.proto != proto) { 206 OUTP_DBG(outp, "no heads (%x %d %d)", ior->arm.head, 207 ior->arm.proto, proto); 208 return; 209 } 210 211 OUTP_DBG(outp, "on %s link %x", ior->name, ior->arm.link); 212 ior->arm.outp = outp; 213 } 214 215 void 216 nvkm_outp_init(struct nvkm_outp *outp) 217 { 218 nvkm_outp_init_route(outp); 219 if (outp->func->init) 220 outp->func->init(outp); 221 } 222 223 void 224 nvkm_outp_del(struct nvkm_outp **poutp) 225 { 226 struct nvkm_outp *outp = *poutp; 227 if (outp && !WARN_ON(!outp->func)) { 228 if (outp->func->dtor) 229 *poutp = outp->func->dtor(outp); 230 kfree(*poutp); 231 *poutp = NULL; 232 } 233 } 234 235 int 236 nvkm_outp_ctor(const struct nvkm_outp_func *func, struct nvkm_disp *disp, 237 int index, struct dcb_output *dcbE, struct nvkm_outp *outp) 238 { 239 struct nvkm_i2c *i2c = disp->engine.subdev.device->i2c; 240 enum nvkm_ior_proto proto; 241 enum nvkm_ior_type type; 242 243 outp->func = func; 244 outp->disp = disp; 245 outp->index = index; 246 outp->info = *dcbE; 247 outp->i2c = nvkm_i2c_bus_find(i2c, dcbE->i2c_index); 248 outp->or = ffs(outp->info.or) - 1; 249 250 OUTP_DBG(outp, "type %02x loc %d or %d link %d con %x " 251 "edid %x bus %d head %x", 252 outp->info.type, outp->info.location, outp->info.or, 253 outp->info.type >= 2 ? outp->info.sorconf.link : 0, 254 outp->info.connector, outp->info.i2c_index, 255 outp->info.bus, outp->info.heads); 256 257 /* Cull output paths we can't map to an output resource. */ 258 proto = nvkm_outp_xlat(outp, &type); 259 if (proto == UNKNOWN) 260 return -ENODEV; 261 262 return 0; 263 } 264 265 static const struct nvkm_outp_func 266 nvkm_outp = { 267 }; 268 269 int 270 nvkm_outp_new(struct nvkm_disp *disp, int index, struct dcb_output *dcbE, 271 struct nvkm_outp **poutp) 272 { 273 if (!(*poutp = kzalloc(sizeof(**poutp), GFP_KERNEL))) 274 return -ENOMEM; 275 return nvkm_outp_ctor(&nvkm_outp, disp, index, dcbE, *poutp); 276 } 277