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_uconn(p) container_of((p), struct nvkm_conn, object)
23 #include "conn.h"
24
25 #include <subdev/gpio.h>
26
27 #include <nvif/if0011.h>
28
29 static int
nvkm_uconn_mthd_hpd_status(struct nvkm_conn * conn,void * argv,u32 argc)30 nvkm_uconn_mthd_hpd_status(struct nvkm_conn *conn, void *argv, u32 argc)
31 {
32 struct nvkm_gpio *gpio = conn->disp->engine.subdev.device->gpio;
33 union nvif_conn_hpd_status_args *args = argv;
34
35 if (argc != sizeof(args->v0) || args->v0.version != 0)
36 return -ENOSYS;
37
38 args->v0.support = gpio && conn->info.hpd != DCB_GPIO_UNUSED;
39 args->v0.present = 0;
40
41 if (args->v0.support) {
42 int ret = nvkm_gpio_get(gpio, 0, DCB_GPIO_UNUSED, conn->info.hpd);
43
44 if (WARN_ON(ret < 0)) {
45 args->v0.support = false;
46 return 0;
47 }
48
49 args->v0.present = ret;
50 }
51
52 return 0;
53 }
54
55 static int
nvkm_uconn_mthd(struct nvkm_object * object,u32 mthd,void * argv,u32 argc)56 nvkm_uconn_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
57 {
58 struct nvkm_conn *conn = nvkm_uconn(object);
59
60 switch (mthd) {
61 case NVIF_CONN_V0_HPD_STATUS: return nvkm_uconn_mthd_hpd_status(conn, argv, argc);
62 default:
63 break;
64 }
65
66 return -EINVAL;
67 }
68
69 static void *
nvkm_uconn_dtor(struct nvkm_object * object)70 nvkm_uconn_dtor(struct nvkm_object *object)
71 {
72 struct nvkm_conn *conn = nvkm_uconn(object);
73 struct nvkm_disp *disp = conn->disp;
74
75 spin_lock(&disp->client.lock);
76 conn->object.func = NULL;
77 spin_unlock(&disp->client.lock);
78 return NULL;
79 }
80
81 static const struct nvkm_object_func
82 nvkm_uconn = {
83 .dtor = nvkm_uconn_dtor,
84 .mthd = nvkm_uconn_mthd,
85 };
86
87 int
nvkm_uconn_new(const struct nvkm_oclass * oclass,void * argv,u32 argc,struct nvkm_object ** pobject)88 nvkm_uconn_new(const struct nvkm_oclass *oclass, void *argv, u32 argc, struct nvkm_object **pobject)
89 {
90 struct nvkm_disp *disp = nvkm_udisp(oclass->parent);
91 struct nvkm_conn *cont, *conn = NULL;
92 union nvif_conn_args *args = argv;
93 int ret;
94
95 if (argc != sizeof(args->v0) || args->v0.version != 0)
96 return -ENOSYS;
97
98 list_for_each_entry(cont, &disp->conns, head) {
99 if (cont->index == args->v0.id) {
100 conn = cont;
101 break;
102 }
103 }
104
105 if (!conn)
106 return -EINVAL;
107
108 ret = -EBUSY;
109 spin_lock(&disp->client.lock);
110 if (!conn->object.func) {
111 nvkm_object_ctor(&nvkm_uconn, oclass, &conn->object);
112 *pobject = &conn->object;
113 ret = 0;
114 }
115 spin_unlock(&disp->client.lock);
116 return ret;
117 }
118