1 /* $NetBSD: nouveau_nvkm_engine_disp_head.c,v 1.2 2021/12/18 23:45:35 riastradh Exp $ */
2
3 /*
4 * Copyright 2017 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs <bskeggs@redhat.com>
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_engine_disp_head.c,v 1.2 2021/12/18 23:45:35 riastradh Exp $");
28
29 #include "head.h"
30
31 #include <core/client.h>
32
33 #include <nvif/cl0046.h>
34 #include <nvif/unpack.h>
35
36 struct nvkm_head *
nvkm_head_find(struct nvkm_disp * disp,int id)37 nvkm_head_find(struct nvkm_disp *disp, int id)
38 {
39 struct nvkm_head *head;
40 list_for_each_entry(head, &disp->head, head) {
41 if (head->id == id)
42 return head;
43 }
44 return NULL;
45 }
46
47 int
nvkm_head_mthd_scanoutpos(struct nvkm_object * object,struct nvkm_head * head,void * data,u32 size)48 nvkm_head_mthd_scanoutpos(struct nvkm_object *object,
49 struct nvkm_head *head, void *data, u32 size)
50 {
51 union {
52 struct nv04_disp_scanoutpos_v0 v0;
53 } *args = data;
54 int ret = -ENOSYS;
55
56 nvif_ioctl(object, "head scanoutpos size %d\n", size);
57 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
58 nvif_ioctl(object, "head scanoutpos vers %d\n",
59 args->v0.version);
60
61 head->func->state(head, &head->arm);
62 args->v0.vtotal = head->arm.vtotal;
63 args->v0.vblanks = head->arm.vblanks;
64 args->v0.vblanke = head->arm.vblanke;
65 args->v0.htotal = head->arm.htotal;
66 args->v0.hblanks = head->arm.hblanks;
67 args->v0.hblanke = head->arm.hblanke;
68
69 /* We don't support reading htotal/vtotal on pre-NV50 VGA,
70 * so we have to give up and trigger the timestamping
71 * fallback in the drm core.
72 */
73 if (!args->v0.vtotal || !args->v0.htotal)
74 return -ENOTSUPP;
75
76 args->v0.time[0] = ktime_to_ns(ktime_get());
77 head->func->rgpos(head, &args->v0.hline, &args->v0.vline);
78 args->v0.time[1] = ktime_to_ns(ktime_get());
79 } else
80 return ret;
81
82 return 0;
83 }
84
85 void
nvkm_head_del(struct nvkm_head ** phead)86 nvkm_head_del(struct nvkm_head **phead)
87 {
88 struct nvkm_head *head = *phead;
89 if (head) {
90 HEAD_DBG(head, "dtor");
91 list_del(&head->head);
92 kfree(*phead);
93 *phead = NULL;
94 }
95 }
96
97 int
nvkm_head_new_(const struct nvkm_head_func * func,struct nvkm_disp * disp,int id)98 nvkm_head_new_(const struct nvkm_head_func *func,
99 struct nvkm_disp *disp, int id)
100 {
101 struct nvkm_head *head;
102 if (!(head = kzalloc(sizeof(*head), GFP_KERNEL)))
103 return -ENOMEM;
104 head->func = func;
105 head->disp = disp;
106 head->id = id;
107 list_add_tail(&head->head, &disp->head);
108 HEAD_DBG(head, "ctor");
109 return 0;
110 }
111