drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.c

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This source file includes following definitions.
nvkm_outp_route
nvkm_outp_xlat
nvkm_outp_release
nvkm_outp_acquire_ior
nvkm_outp_acquire
nvkm_outp_fini
nvkm_outp_init_route
nvkm_outp_init
nvkm_outp_del
nvkm_outp_ctor
nvkm_outp_new
   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                         if (outp->func->release && outp->ior)
  97                                 outp->func->release(outp);
  98                         outp->ior->asy.outp = NULL;
  99                         outp->ior = NULL;
 100                 }
 101         }
 102 }
 103 
 104 static inline int
 105 nvkm_outp_acquire_ior(struct nvkm_outp *outp, u8 user, struct nvkm_ior *ior)
 106 {
 107         outp->ior = ior;
 108         outp->ior->asy.outp = outp;
 109         outp->ior->asy.link = outp->info.sorconf.link;
 110         outp->acquired |= user;
 111         return 0;
 112 }
 113 
 114 int
 115 nvkm_outp_acquire(struct nvkm_outp *outp, u8 user)
 116 {
 117         struct nvkm_ior *ior = outp->ior;
 118         enum nvkm_ior_proto proto;
 119         enum nvkm_ior_type type;
 120 
 121         OUTP_TRACE(outp, "acquire %02x |= %02x %p", outp->acquired, user, ior);
 122         if (ior) {
 123                 outp->acquired |= user;
 124                 return 0;
 125         }
 126 
 127         /* Lookup a compatible, and unused, OR to assign to the device. */
 128         proto = nvkm_outp_xlat(outp, &type);
 129         if (proto == UNKNOWN)
 130                 return -ENOSYS;
 131 
 132         /* Deal with panels requiring identity-mapped SOR assignment. */
 133         if (outp->identity) {
 134                 ior = nvkm_ior_find(outp->disp, SOR, ffs(outp->info.or) - 1);
 135                 if (WARN_ON(!ior))
 136                         return -ENOSPC;
 137                 return nvkm_outp_acquire_ior(outp, user, ior);
 138         }
 139 
 140         /* First preference is to reuse the OR that is currently armed
 141          * on HW, if any, in order to prevent unnecessary switching.
 142          */
 143         list_for_each_entry(ior, &outp->disp->ior, head) {
 144                 if (!ior->identity && !ior->asy.outp && ior->arm.outp == outp)
 145                         return nvkm_outp_acquire_ior(outp, user, ior);
 146         }
 147 
 148         /* Failing that, a completely unused OR is the next best thing. */
 149         list_for_each_entry(ior, &outp->disp->ior, head) {
 150                 if (!ior->identity &&
 151                     !ior->asy.outp && ior->type == type && !ior->arm.outp &&
 152                     (ior->func->route.set || ior->id == __ffs(outp->info.or)))
 153                         return nvkm_outp_acquire_ior(outp, user, ior);
 154         }
 155 
 156         /* Last resort is to assign an OR that's already active on HW,
 157          * but will be released during the next modeset.
 158          */
 159         list_for_each_entry(ior, &outp->disp->ior, head) {
 160                 if (!ior->identity && !ior->asy.outp && ior->type == type &&
 161                     (ior->func->route.set || ior->id == __ffs(outp->info.or)))
 162                         return nvkm_outp_acquire_ior(outp, user, ior);
 163         }
 164 
 165         return -ENOSPC;
 166 }
 167 
 168 void
 169 nvkm_outp_fini(struct nvkm_outp *outp)
 170 {
 171         if (outp->func->fini)
 172                 outp->func->fini(outp);
 173 }
 174 
 175 static void
 176 nvkm_outp_init_route(struct nvkm_outp *outp)
 177 {
 178         struct nvkm_disp *disp = outp->disp;
 179         enum nvkm_ior_proto proto;
 180         enum nvkm_ior_type type;
 181         struct nvkm_ior *ior;
 182         int id, link;
 183 
 184         /* Find any OR from the class that is able to support this device. */
 185         proto = nvkm_outp_xlat(outp, &type);
 186         if (proto == UNKNOWN)
 187                 return;
 188 
 189         ior = nvkm_ior_find(disp, type, -1);
 190         if (!ior) {
 191                 WARN_ON(1);
 192                 return;
 193         }
 194 
 195         /* Determine the specific OR, if any, this device is attached to. */
 196         if (ior->func->route.get) {
 197                 id = ior->func->route.get(outp, &link);
 198                 if (id < 0) {
 199                         OUTP_DBG(outp, "no route");
 200                         return;
 201                 }
 202         } else {
 203                 /* Prior to DCB 4.1, this is hardwired like so. */
 204                 id   = ffs(outp->info.or) - 1;
 205                 link = (ior->type == SOR) ? outp->info.sorconf.link : 0;
 206         }
 207 
 208         ior = nvkm_ior_find(disp, type, id);
 209         if (!ior) {
 210                 WARN_ON(1);
 211                 return;
 212         }
 213 
 214         /* Determine if the OR is already configured for this device. */
 215         ior->func->state(ior, &ior->arm);
 216         if (!ior->arm.head || ior->arm.proto != proto) {
 217                 OUTP_DBG(outp, "no heads (%x %d %d)", ior->arm.head,
 218                          ior->arm.proto, proto);
 219                 return;
 220         }
 221 
 222         OUTP_DBG(outp, "on %s link %x", ior->name, ior->arm.link);
 223         ior->arm.outp = outp;
 224 }
 225 
 226 void
 227 nvkm_outp_init(struct nvkm_outp *outp)
 228 {
 229         nvkm_outp_init_route(outp);
 230         if (outp->func->init)
 231                 outp->func->init(outp);
 232 }
 233 
 234 void
 235 nvkm_outp_del(struct nvkm_outp **poutp)
 236 {
 237         struct nvkm_outp *outp = *poutp;
 238         if (outp && !WARN_ON(!outp->func)) {
 239                 if (outp->func->dtor)
 240                         *poutp = outp->func->dtor(outp);
 241                 kfree(*poutp);
 242                 *poutp = NULL;
 243         }
 244 }
 245 
 246 int
 247 nvkm_outp_ctor(const struct nvkm_outp_func *func, struct nvkm_disp *disp,
 248                int index, struct dcb_output *dcbE, struct nvkm_outp *outp)
 249 {
 250         struct nvkm_i2c *i2c = disp->engine.subdev.device->i2c;
 251         enum nvkm_ior_proto proto;
 252         enum nvkm_ior_type type;
 253 
 254         outp->func = func;
 255         outp->disp = disp;
 256         outp->index = index;
 257         outp->info = *dcbE;
 258         outp->i2c = nvkm_i2c_bus_find(i2c, dcbE->i2c_index);
 259 
 260         OUTP_DBG(outp, "type %02x loc %d or %d link %d con %x "
 261                        "edid %x bus %d head %x",
 262                  outp->info.type, outp->info.location, outp->info.or,
 263                  outp->info.type >= 2 ? outp->info.sorconf.link : 0,
 264                  outp->info.connector, outp->info.i2c_index,
 265                  outp->info.bus, outp->info.heads);
 266 
 267         /* Cull output paths we can't map to an output resource. */
 268         proto = nvkm_outp_xlat(outp, &type);
 269         if (proto == UNKNOWN)
 270                 return -ENODEV;
 271 
 272         return 0;
 273 }
 274 
 275 static const struct nvkm_outp_func
 276 nvkm_outp = {
 277 };
 278 
 279 int
 280 nvkm_outp_new(struct nvkm_disp *disp, int index, struct dcb_output *dcbE,
 281               struct nvkm_outp **poutp)
 282 {
 283         if (!(*poutp = kzalloc(sizeof(**poutp), GFP_KERNEL)))
 284                 return -ENOMEM;
 285         return nvkm_outp_ctor(&nvkm_outp, disp, index, dcbE, *poutp);
 286 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.c

DEFINITIONS
