1 /*
2 * Copyright 2021 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 #define nvkm_uhead(p) container_of((p), struct nvkm_head, object)
23 #include "head.h"
24 #include <core/event.h>
25
26 #include <nvif/if0013.h>
27
28 #include <nvif/event.h>
29
30 static int
nvkm_uhead_uevent(struct nvkm_object * object,void * argv,u32 argc,struct nvkm_uevent * uevent)31 nvkm_uhead_uevent(struct nvkm_object *object, void *argv, u32 argc, struct nvkm_uevent *uevent)
32 {
33 struct nvkm_head *head = nvkm_uhead(object);
34 union nvif_head_event_args *args = argv;
35
36 if (!uevent)
37 return 0;
38 if (argc != sizeof(args->vn))
39 return -ENOSYS;
40
41 return nvkm_uevent_add(uevent, &head->disp->vblank, head->id,
42 NVKM_DISP_HEAD_EVENT_VBLANK, NULL);
43 }
44
45 static int
nvkm_uhead_mthd_scanoutpos(struct nvkm_head * head,void * argv,u32 argc)46 nvkm_uhead_mthd_scanoutpos(struct nvkm_head *head, void *argv, u32 argc)
47 {
48 union nvif_head_scanoutpos_args *args = argv;
49
50 if (argc != sizeof(args->v0) || args->v0.version != 0)
51 return -ENOSYS;
52
53 head->func->state(head, &head->arm);
54 args->v0.vtotal = head->arm.vtotal;
55 args->v0.vblanks = head->arm.vblanks;
56 args->v0.vblanke = head->arm.vblanke;
57 args->v0.htotal = head->arm.htotal;
58 args->v0.hblanks = head->arm.hblanks;
59 args->v0.hblanke = head->arm.hblanke;
60
61 /* We don't support reading htotal/vtotal on pre-NV50 VGA,
62 * so we have to give up and trigger the timestamping
63 * fallback in the drm core.
64 */
65 if (!args->v0.vtotal || !args->v0.htotal)
66 return -ENOTSUPP;
67
68 args->v0.time[0] = ktime_to_ns(ktime_get());
69 head->func->rgpos(head, &args->v0.hline, &args->v0.vline);
70 args->v0.time[1] = ktime_to_ns(ktime_get());
71 return 0;
72 }
73
74 static int
nvkm_uhead_mthd(struct nvkm_object * object,u32 mthd,void * argv,u32 argc)75 nvkm_uhead_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
76 {
77 struct nvkm_head *head = nvkm_uhead(object);
78
79 switch (mthd) {
80 case NVIF_HEAD_V0_SCANOUTPOS: return nvkm_uhead_mthd_scanoutpos(head, argv, argc);
81 default:
82 return -EINVAL;
83 }
84 }
85
86 static void *
nvkm_uhead_dtor(struct nvkm_object * object)87 nvkm_uhead_dtor(struct nvkm_object *object)
88 {
89 struct nvkm_head *head = nvkm_uhead(object);
90 struct nvkm_disp *disp = head->disp;
91
92 spin_lock(&disp->client.lock);
93 head->object.func = NULL;
94 spin_unlock(&disp->client.lock);
95 return NULL;
96 }
97
98 static const struct nvkm_object_func
99 nvkm_uhead = {
100 .dtor = nvkm_uhead_dtor,
101 .mthd = nvkm_uhead_mthd,
102 .uevent = nvkm_uhead_uevent,
103 };
104
105 int
nvkm_uhead_new(const struct nvkm_oclass * oclass,void * argv,u32 argc,struct nvkm_object ** pobject)106 nvkm_uhead_new(const struct nvkm_oclass *oclass, void *argv, u32 argc, struct nvkm_object **pobject)
107 {
108 struct nvkm_disp *disp = nvkm_udisp(oclass->parent);
109 struct nvkm_head *head;
110 union nvif_head_args *args = argv;
111 int ret;
112
113 if (argc != sizeof(args->v0) || args->v0.version != 0)
114 return -ENOSYS;
115 if (!(head = nvkm_head_find(disp, args->v0.id)))
116 return -EINVAL;
117
118 ret = -EBUSY;
119 spin_lock(&disp->client.lock);
120 if (!head->object.func) {
121 nvkm_object_ctor(&nvkm_uhead, oclass, &head->object);
122 *pobject = &head->object;
123 ret = 0;
124 }
125 spin_unlock(&disp->client.lock);
126 return ret;
127 }
128