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

   1 /*
   2  * Copyright 2017 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 <bskeggs@redhat.com>
  23  */
  24 #include "head.h"
  25
  26 #include <core/client.h>
  27
  28 #include <nvif/cl0046.h>
  29 #include <nvif/unpack.h>
  30
  31 struct nvkm_head *
  32 nvkm_head_find(struct nvkm_disp *disp, int id)
  33 {
  34         struct nvkm_head *head;
  35         list_for_each_entry(head, &disp->head, head) {
  36                 if (head->id == id)
  37                         return head;
  38         }
  39         return NULL;
  40 }
  41
  42 int
  43 nvkm_head_mthd_scanoutpos(struct nvkm_object *object,
  44                           struct nvkm_head *head, void *data, u32 size)
  45 {
  46         union {
  47                 struct nv04_disp_scanoutpos_v0 v0;
  48         } *args = data;
  49         int ret = -ENOSYS;
  50
  51         nvif_ioctl(object, "head scanoutpos size %d\n", size);
  52         if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
  53                 nvif_ioctl(object, "head scanoutpos vers %d\n",
  54                            args->v0.version);
  55
  56                 head->func->state(head, &head->arm);
  57                 args->v0.vtotal  = head->arm.vtotal;
  58                 args->v0.vblanks = head->arm.vblanks;
  59                 args->v0.vblanke = head->arm.vblanke;
  60                 args->v0.htotal  = head->arm.htotal;
  61                 args->v0.hblanks = head->arm.hblanks;
  62                 args->v0.hblanke = head->arm.hblanke;
  63
  64                 /* We don't support reading htotal/vtotal on pre-NV50 VGA,
  65                  * so we have to give up and trigger the timestamping
  66                  * fallback in the drm core.
  67                  */
  68                 if (!args->v0.vtotal || !args->v0.htotal)
  69                         return -ENOTSUPP;
  70
  71                 args->v0.time[0] = ktime_to_ns(ktime_get());
  72                 head->func->rgpos(head, &args->v0.hline, &args->v0.vline);
  73                 args->v0.time[1] = ktime_to_ns(ktime_get());
  74         } else
  75                 return ret;
  76
  77         return 0;
  78 }
  79
  80 void
  81 nvkm_head_del(struct nvkm_head **phead)
  82 {
  83         struct nvkm_head *head = *phead;
  84         if (head) {
  85                 HEAD_DBG(head, "dtor");
  86                 list_del(&head->head);
  87                 kfree(*phead);
  88                 *phead = NULL;
  89         }
  90 }
  91
  92 int
  93 nvkm_head_new_(const struct nvkm_head_func *func,
  94                struct nvkm_disp *disp, int id)
  95 {
  96         struct nvkm_head *head;
  97         if (!(head = kzalloc(sizeof(*head), GFP_KERNEL)))
  98                 return -ENOMEM;
  99         head->func = func;
 100         head->disp = disp;
 101         head->id = id;
 102         list_add_tail(&head->head, &disp->head);
 103         HEAD_DBG(head, "ctor");
 104         return 0;
 105 }