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 "dp.h" 26 #include "ior.h" 27 28 #include <subdev/bios.h> 29 #include <subdev/bios/dcb.h> 30 #include <subdev/i2c.h> 31 32 void 33 nvkm_outp_route(struct nvkm_disp *disp) 34 { 35 struct nvkm_outp *outp; 36 struct nvkm_ior *ior; 37 38 list_for_each_entry(ior, &disp->ior, head) { 39 if ((outp = ior->arm.outp) && ior->arm.outp != ior->asy.outp) { 40 OUTP_DBG(outp, "release %s", ior->name); 41 if (ior->func->route.set) 42 ior->func->route.set(outp, NULL); 43 ior->arm.outp = NULL; 44 } 45 } 46 47 list_for_each_entry(ior, &disp->ior, head) { 48 if ((outp = ior->asy.outp)) { 49 OUTP_DBG(outp, "acquire %s", ior->name); 50 if (ior->asy.outp != ior->arm.outp) { 51 if (ior->func->route.set) 52 ior->func->route.set(outp, ior); 53 ior->arm.outp = ior->asy.outp; 54 } 55 } 56 } 57 } 58 59 static enum nvkm_ior_proto 60 nvkm_outp_xlat(struct nvkm_outp *outp, enum nvkm_ior_type *type) 61 { 62 switch (outp->info.location) { 63 case 0: 64 switch (outp->info.type) { 65 case DCB_OUTPUT_ANALOG: *type = DAC; return CRT; 66 case DCB_OUTPUT_TV : *type = DAC; return TV; 67 case DCB_OUTPUT_TMDS : *type = SOR; return TMDS; 68 case DCB_OUTPUT_LVDS : *type = SOR; return LVDS; 69 case DCB_OUTPUT_DP : *type = SOR; return DP; 70 default: 71 break; 72 } 73 break; 74 case 1: 75 switch (outp->info.type) { 76 case DCB_OUTPUT_TMDS: *type = PIOR; return TMDS; 77 case DCB_OUTPUT_DP : *type = PIOR; return TMDS; /* not a bug */ 78 default: 79 break; 80 } 81 break; 82 default: 83 break; 84 } 85 WARN_ON(1); 86 return UNKNOWN; 87 } 88 89 void 90 nvkm_outp_release(struct nvkm_outp *outp, u8 user) 91 { 92 struct nvkm_ior *ior = outp->ior; 93 OUTP_TRACE(outp, "release %02x &= %02x %p", outp->acquired, ~user, ior); 94 if (ior) { 95 outp->acquired &= ~user; 96 if (!outp->acquired) { 97 if (outp->func->release && outp->ior) 98 outp->func->release(outp); 99 outp->ior->asy.outp = NULL; 100 outp->ior = NULL; 101 } 102 } 103 } 104 105 static inline int 106 nvkm_outp_acquire_ior(struct nvkm_outp *outp, u8 user, struct nvkm_ior *ior) 107 { 108 outp->ior = ior; 109 outp->ior->asy.outp = outp; 110 outp->ior->asy.link = outp->info.sorconf.link; 111 outp->acquired |= user; 112 return 0; 113 } 114 115 static inline int 116 nvkm_outp_acquire_hda(struct nvkm_outp *outp, enum nvkm_ior_type type, 117 u8 user, bool hda) 118 { 119 struct nvkm_ior *ior; 120 121 /* Failing that, a completely unused OR is the next best thing. */ 122 list_for_each_entry(ior, &outp->disp->ior, head) { 123 if (!ior->identity && !!ior->func->hda.hpd == hda && 124 !ior->asy.outp && ior->type == type && !ior->arm.outp && 125 (ior->func->route.set || ior->id == __ffs(outp->info.or))) 126 return nvkm_outp_acquire_ior(outp, user, ior); 127 } 128 129 /* Last resort is to assign an OR that's already active on HW, 130 * but will be released during the next modeset. 131 */ 132 list_for_each_entry(ior, &outp->disp->ior, head) { 133 if (!ior->identity && !!ior->func->hda.hpd == hda && 134 !ior->asy.outp && ior->type == type && 135 (ior->func->route.set || ior->id == __ffs(outp->info.or))) 136 return nvkm_outp_acquire_ior(outp, user, ior); 137 } 138 139 return -ENOSPC; 140 } 141 142 int 143 nvkm_outp_acquire(struct nvkm_outp *outp, u8 user, bool hda) 144 { 145 struct nvkm_ior *ior = outp->ior; 146 enum nvkm_ior_proto proto; 147 enum nvkm_ior_type type; 148 149 OUTP_TRACE(outp, "acquire %02x |= %02x %p", outp->acquired, user, ior); 150 if (ior) { 151 outp->acquired |= user; 152 return 0; 153 } 154 155 /* Lookup a compatible, and unused, OR to assign to the device. */ 156 proto = nvkm_outp_xlat(outp, &type); 157 if (proto == UNKNOWN) 158 return -ENOSYS; 159 160 /* Deal with panels requiring identity-mapped SOR assignment. */ 161 if (outp->identity) { 162 ior = nvkm_ior_find(outp->disp, SOR, ffs(outp->info.or) - 1); 163 if (WARN_ON(!ior)) 164 return -ENOSPC; 165 return nvkm_outp_acquire_ior(outp, user, ior); 166 } 167 168 /* First preference is to reuse the OR that is currently armed 169 * on HW, if any, in order to prevent unnecessary switching. 170 */ 171 list_for_each_entry(ior, &outp->disp->ior, head) { 172 if (!ior->identity && !ior->asy.outp && ior->arm.outp == outp) { 173 /*XXX: For various complicated reasons, we can't outright switch 174 * the boot-time OR on the first modeset without some fairly 175 * invasive changes. 176 * 177 * The systems that were fixed by modifying the OR selection 178 * code to account for HDA support shouldn't regress here as 179 * the HDA-enabled ORs match the relevant output's pad macro 180 * index, and the firmware seems to select an OR this way. 181 * 182 * This warning is to make it obvious if that proves wrong. 183 */ 184 WARN_ON(hda && !ior->func->hda.hpd); 185 return nvkm_outp_acquire_ior(outp, user, ior); 186 } 187 } 188 189 /* If we don't need HDA, first try to acquire an OR that doesn't 190 * support it to leave free the ones that do. 191 */ 192 if (!hda) { 193 if (!nvkm_outp_acquire_hda(outp, type, user, false)) 194 return 0; 195 196 /* Use a HDA-supporting SOR anyway. */ 197 return nvkm_outp_acquire_hda(outp, type, user, true); 198 } 199 200 /* We want HDA, try to acquire an OR that supports it. */ 201 if (!nvkm_outp_acquire_hda(outp, type, user, true)) 202 return 0; 203 204 /* There weren't any free ORs that support HDA, grab one that 205 * doesn't and at least allow display to work still. 206 */ 207 return nvkm_outp_acquire_hda(outp, type, user, false); 208 } 209 210 void 211 nvkm_outp_fini(struct nvkm_outp *outp) 212 { 213 if (outp->func->fini) 214 outp->func->fini(outp); 215 } 216 217 static void 218 nvkm_outp_init_route(struct nvkm_outp *outp) 219 { 220 struct nvkm_disp *disp = outp->disp; 221 enum nvkm_ior_proto proto; 222 enum nvkm_ior_type type; 223 struct nvkm_ior *ior; 224 int id, link; 225 226 /* Find any OR from the class that is able to support this device. */ 227 proto = nvkm_outp_xlat(outp, &type); 228 if (proto == UNKNOWN) 229 return; 230 231 ior = nvkm_ior_find(disp, type, -1); 232 if (!ior) { 233 WARN_ON(1); 234 return; 235 } 236 237 /* Determine the specific OR, if any, this device is attached to. */ 238 if (ior->func->route.get) { 239 id = ior->func->route.get(outp, &link); 240 if (id < 0) { 241 OUTP_DBG(outp, "no route"); 242 return; 243 } 244 } else { 245 /* Prior to DCB 4.1, this is hardwired like so. */ 246 id = ffs(outp->info.or) - 1; 247 link = (ior->type == SOR) ? outp->info.sorconf.link : 0; 248 } 249 250 ior = nvkm_ior_find(disp, type, id); 251 if (!ior) { 252 WARN_ON(1); 253 return; 254 } 255 256 /* Determine if the OR is already configured for this device. */ 257 ior->func->state(ior, &ior->arm); 258 if (!ior->arm.head || ior->arm.proto != proto) { 259 OUTP_DBG(outp, "no heads (%x %d %d)", ior->arm.head, 260 ior->arm.proto, proto); 261 262 /* The EFI GOP driver on Ampere can leave unused DP links routed, 263 * which we don't expect. The DisableLT IED script *should* get 264 * us back to where we need to be. 265 */ 266 if (ior->func->route.get && !ior->arm.head && outp->info.type == DCB_OUTPUT_DP) 267 nvkm_dp_disable(outp, ior); 268 269 return; 270 } 271 272 OUTP_DBG(outp, "on %s link %x", ior->name, ior->arm.link); 273 ior->arm.outp = outp; 274 } 275 276 void 277 nvkm_outp_init(struct nvkm_outp *outp) 278 { 279 nvkm_outp_init_route(outp); 280 if (outp->func->init) 281 outp->func->init(outp); 282 } 283 284 void 285 nvkm_outp_del(struct nvkm_outp **poutp) 286 { 287 struct nvkm_outp *outp = *poutp; 288 if (outp && !WARN_ON(!outp->func)) { 289 if (outp->func->dtor) 290 *poutp = outp->func->dtor(outp); 291 kfree(*poutp); 292 *poutp = NULL; 293 } 294 } 295 296 int 297 nvkm_outp_ctor(const struct nvkm_outp_func *func, struct nvkm_disp *disp, 298 int index, struct dcb_output *dcbE, struct nvkm_outp *outp) 299 { 300 struct nvkm_i2c *i2c = disp->engine.subdev.device->i2c; 301 enum nvkm_ior_proto proto; 302 enum nvkm_ior_type type; 303 304 outp->func = func; 305 outp->disp = disp; 306 outp->index = index; 307 outp->info = *dcbE; 308 outp->i2c = nvkm_i2c_bus_find(i2c, dcbE->i2c_index); 309 310 OUTP_DBG(outp, "type %02x loc %d or %d link %d con %x " 311 "edid %x bus %d head %x", 312 outp->info.type, outp->info.location, outp->info.or, 313 outp->info.type >= 2 ? outp->info.sorconf.link : 0, 314 outp->info.connector, outp->info.i2c_index, 315 outp->info.bus, outp->info.heads); 316 317 /* Cull output paths we can't map to an output resource. */ 318 proto = nvkm_outp_xlat(outp, &type); 319 if (proto == UNKNOWN) 320 return -ENODEV; 321 322 return 0; 323 } 324 325 static const struct nvkm_outp_func 326 nvkm_outp = { 327 }; 328 329 int 330 nvkm_outp_new(struct nvkm_disp *disp, int index, struct dcb_output *dcbE, 331 struct nvkm_outp **poutp) 332 { 333 if (!(*poutp = kzalloc(sizeof(**poutp), GFP_KERNEL))) 334 return -ENOMEM; 335 return nvkm_outp_ctor(&nvkm_outp, disp, index, dcbE, *poutp); 336 } 337