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 <subdev/gpio.h>
  26
  27 #include "conn.h"
  28 #include "outp.h"
  29
  30 static void
  31 nvkm_connector_hpd_work(struct work_struct *w)
  32 {
  33         struct nvkm_connector *conn = container_of(w, typeof(*conn), hpd.work);
  34         struct nouveau_disp *disp = nouveau_disp(conn);
  35         struct nouveau_gpio *gpio = nouveau_gpio(conn);
  36         u32 send = NVKM_HPD_UNPLUG;
  37         if (gpio->get(gpio, 0, DCB_GPIO_UNUSED, conn->hpd.event->index))
  38                 send = NVKM_HPD_PLUG;
  39         nouveau_event_trigger(disp->hpd, send, conn->index);
  40         nouveau_event_get(conn->hpd.event);
  41 }
  42
  43 static int
  44 nvkm_connector_hpd(void *data, u32 type, int index)
  45 {
  46         struct nvkm_connector *conn = data;
  47         DBG("HPD: %d\n", type);
  48         schedule_work(&conn->hpd.work);
  49         return NVKM_EVENT_DROP;
  50 }
  51
  52 int
  53 _nvkm_connector_fini(struct nouveau_object *object, bool suspend)
  54 {
  55         struct nvkm_connector *conn = (void *)object;
  56         if (conn->hpd.event)
  57                 nouveau_event_put(conn->hpd.event);
  58         return nouveau_object_fini(&conn->base, suspend);
  59 }
  60
  61 int
  62 _nvkm_connector_init(struct nouveau_object *object)
  63 {
  64         struct nvkm_connector *conn = (void *)object;
  65         int ret = nouveau_object_init(&conn->base);
  66         if (ret == 0) {
  67                 if (conn->hpd.event)
  68                         nouveau_event_get(conn->hpd.event);
  69         }
  70         return ret;
  71 }
  72
  73 void
  74 _nvkm_connector_dtor(struct nouveau_object *object)
  75 {
  76         struct nvkm_connector *conn = (void *)object;
  77         nouveau_event_ref(NULL, &conn->hpd.event);
  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_gpio *gpio = nouveau_gpio(parent);
  90         struct nouveau_disp *disp = (void *)engine;
  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                         goto done;
 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                         goto done;
 127                 }
 128
 129                 ret = nouveau_event_new(gpio->events, NVKM_GPIO_TOGGLED,
 130                                         func.line, nvkm_connector_hpd,
 131                                         conn, &conn->hpd.event);
 132                 if (ret) {
 133                         ERR("func %02x failed, %d\n", info->hpd, ret);
 134                 } else {
 135                         DBG("func %02x (HPD)\n", info->hpd);
 136                 }
 137         }
 138
 139 done:
 140         INIT_WORK(&conn->hpd.work, nvkm_connector_hpd_work);
 141         return 0;
 142 }
 143
 144 int
 145 _nvkm_connector_ctor(struct nouveau_object *parent,
 146                      struct nouveau_object *engine,
 147                      struct nouveau_oclass *oclass, void *info, u32 index,
 148                      struct nouveau_object **pobject)
 149 {
 150         struct nvkm_connector *conn;
 151         int ret;
 152
 153         ret = nvkm_connector_create(parent, engine, oclass, info, index, &conn);
 154         *pobject = nv_object(conn);
 155         if (ret)
 156                 return ret;
 157
 158         return 0;
 159 }
 160
 161 struct nouveau_oclass *
 162 nvkm_connector_oclass = &(struct nvkm_connector_impl) {
 163         .base = {
 164                 .handle = 0,
 165                 .ofuncs = &(struct nouveau_ofuncs) {
 166                         .ctor = _nvkm_connector_ctor,
 167                         .dtor = _nvkm_connector_dtor,
 168                         .init = _nvkm_connector_init,
 169                         .fini = _nvkm_connector_fini,
 170                 },
 171         },
 172 }.base;