drivers/gpu/drm/nouveau/core/engine/disp/conn.c

   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
  25 #include <core/os.h>
  26 #include <nvif/event.h>
  27
  28 #include <subdev/gpio.h>
  29
  30 #include "conn.h"
  31 #include "outp.h"
  32
  33 static int
  34 nvkm_connector_hpd(struct nvkm_notify *notify)
  35 {
  36         struct nvkm_connector *conn = container_of(notify, typeof(*conn), hpd);
  37         struct nouveau_disp *disp = nouveau_disp(conn);
  38         struct nouveau_gpio *gpio = nouveau_gpio(conn);
  39         const struct nvkm_gpio_ntfy_rep *line = notify->data;
  40         struct nvif_notify_conn_rep_v0 rep;
  41         int index = conn->index;
  42
  43         DBG("HPD: %d\n", line->mask);
  44
  45         if (!gpio->get(gpio, 0, DCB_GPIO_UNUSED, conn->hpd.index))
  46                 rep.mask = NVIF_NOTIFY_CONN_V0_UNPLUG;
  47         else
  48                 rep.mask = NVIF_NOTIFY_CONN_V0_PLUG;
  49         rep.version = 0;
  50
  51         nvkm_event_send(&disp->hpd, rep.mask, index, &rep, sizeof(rep));
  52         return NVKM_NOTIFY_KEEP;
  53 }
  54
  55 int
  56 _nvkm_connector_fini(struct nouveau_object *object, bool suspend)
  57 {
  58         struct nvkm_connector *conn = (void *)object;
  59         nvkm_notify_put(&conn->hpd);
  60         return nouveau_object_fini(&conn->base, suspend);
  61 }
  62
  63 int
  64 _nvkm_connector_init(struct nouveau_object *object)
  65 {
  66         struct nvkm_connector *conn = (void *)object;
  67         int ret = nouveau_object_init(&conn->base);
  68         if (ret == 0)
  69                 nvkm_notify_get(&conn->hpd);
  70         return ret;
  71 }
  72
  73 void
  74 _nvkm_connector_dtor(struct nouveau_object *object)
  75 {
  76         struct nvkm_connector *conn = (void *)object;
  77         nvkm_notify_fini(&conn->hpd);
  78         nouveau_object_destroy(&conn->base);
  79 }
  80
  81 int
  82 nvkm_connector_create_(struct nouveau_object *parent,
  83                        struct nouveau_object *engine,
  84                        struct nouveau_oclass *oclass,
  85                        struct nvbios_connE *info, int index,
  86                        int length, void **pobject)
  87 {
  88         static const u8 hpd[] = { 0x07, 0x08, 0x51, 0x52, 0x5e, 0x5f, 0x60 };
  89         struct nouveau_disp *disp = nouveau_disp(parent);
  90         struct nouveau_gpio *gpio = nouveau_gpio(parent);
  91         struct nvkm_connector *conn;
  92         struct nvkm_output *outp;
  93         struct dcb_gpio_func func;
  94         int ret;
  95
  96         list_for_each_entry(outp, &disp->outp, head) {
  97                 if (outp->conn && outp->conn->index == index) {
  98                         atomic_inc(&nv_object(outp->conn)->refcount);
  99                         *pobject = outp->conn;
 100                         return 1;
 101                 }
 102         }
 103
 104         ret = nouveau_object_create_(parent, engine, oclass, 0, length, pobject);
 105         conn = *pobject;
 106         if (ret)
 107                 return ret;
 108
 109         conn->info = *info;
 110         conn->index = index;
 111
 112         DBG("type %02x loc %d hpd %02x dp %x di %x sr %x lcdid %x\n",
 113             info->type, info->location, info->hpd, info->dp,
 114             info->di, info->sr, info->lcdid);
 115
 116         if ((info->hpd = ffs(info->hpd))) {
 117                 if (--info->hpd >= ARRAY_SIZE(hpd)) {
 118                         ERR("hpd %02x unknown\n", info->hpd);
 119                         return 0;
 120                 }
 121                 info->hpd = hpd[info->hpd];
 122
 123                 ret = gpio->find(gpio, 0, info->hpd, DCB_GPIO_UNUSED, &func);
 124                 if (ret) {
 125                         ERR("func %02x lookup failed, %d\n", info->hpd, ret);
 126                         return 0;
 127                 }
 128
 129                 ret = nvkm_notify_init(NULL, &gpio->event, nvkm_connector_hpd,
 130                                        true, &(struct nvkm_gpio_ntfy_req) {
 131                                         .mask = NVKM_GPIO_TOGGLED,
 132                                         .line = func.line,
 133                                        },
 134                                        sizeof(struct nvkm_gpio_ntfy_req),
 135                                        sizeof(struct nvkm_gpio_ntfy_rep),
 136                                        &conn->hpd);
 137                 if (ret) {
 138                         ERR("func %02x failed, %d\n", info->hpd, ret);
 139                 } else {
 140                         DBG("func %02x (HPD)\n", info->hpd);
 141                 }
 142         }
 143
 144         return 0;
 145 }
 146
 147 int
 148 _nvkm_connector_ctor(struct nouveau_object *parent,
 149                      struct nouveau_object *engine,
 150                      struct nouveau_oclass *oclass, void *info, u32 index,
 151                      struct nouveau_object **pobject)
 152 {
 153         struct nvkm_connector *conn;
 154         int ret;
 155
 156         ret = nvkm_connector_create(parent, engine, oclass, info, index, &conn);
 157         *pobject = nv_object(conn);
 158         if (ret)
 159                 return ret;
 160
 161         return 0;
 162 }
 163
 164 struct nouveau_oclass *
 165 nvkm_connector_oclass = &(struct nvkm_connector_impl) {
 166         .base = {
 167                 .handle = 0,
 168                 .ofuncs = &(struct nouveau_ofuncs) {
 169                         .ctor = _nvkm_connector_ctor,
 170                         .dtor = _nvkm_connector_dtor,
 171                         .init = _nvkm_connector_init,
 172                         .fini = _nvkm_connector_fini,
 173                 },
 174         },
 175 }.base;