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 #include "outp.h"
25
26 #include <core/client.h>
27 #include <core/event.h>
28 #include <subdev/gpio.h>
29 #include <subdev/i2c.h>
30
31 #include <nvif/if0011.h>
32
33 static int
nvkm_uconn_uevent_aux(struct nvkm_object * object,u64 token,u32 bits)34 nvkm_uconn_uevent_aux(struct nvkm_object *object, u64 token, u32 bits)
35 {
36 union nvif_conn_event_args args;
37
38 args.v0.version = 0;
39 args.v0.types = 0;
40 if (bits & NVKM_I2C_PLUG)
41 args.v0.types |= NVIF_CONN_EVENT_V0_PLUG;
42 if (bits & NVKM_I2C_UNPLUG)
43 args.v0.types |= NVIF_CONN_EVENT_V0_UNPLUG;
44 if (bits & NVKM_I2C_IRQ)
45 args.v0.types |= NVIF_CONN_EVENT_V0_IRQ;
46
47 return object->client->event(token, &args, sizeof(args.v0));
48 }
49
50 static int
nvkm_uconn_uevent_gpio(struct nvkm_object * object,u64 token,u32 bits)51 nvkm_uconn_uevent_gpio(struct nvkm_object *object, u64 token, u32 bits)
52 {
53 union nvif_conn_event_args args;
54
55 args.v0.version = 0;
56 args.v0.types = 0;
57 if (bits & NVKM_GPIO_HI)
58 args.v0.types |= NVIF_CONN_EVENT_V0_PLUG;
59 if (bits & NVKM_GPIO_LO)
60 args.v0.types |= NVIF_CONN_EVENT_V0_UNPLUG;
61
62 return object->client->event(token, &args, sizeof(args.v0));
63 }
64
65 static bool
nvkm_connector_is_dp_dms(u8 type)66 nvkm_connector_is_dp_dms(u8 type)
67 {
68 switch (type) {
69 case DCB_CONNECTOR_DMS59_DP0:
70 case DCB_CONNECTOR_DMS59_DP1:
71 return true;
72 default:
73 return false;
74 }
75 }
76
77 static int
nvkm_uconn_uevent(struct nvkm_object * object,void * argv,u32 argc,struct nvkm_uevent * uevent)78 nvkm_uconn_uevent(struct nvkm_object *object, void *argv, u32 argc, struct nvkm_uevent *uevent)
79 {
80 struct nvkm_conn *conn = nvkm_uconn(object);
81 struct nvkm_device *device = conn->disp->engine.subdev.device;
82 struct nvkm_outp *outp;
83 union nvif_conn_event_args *args = argv;
84 u64 bits = 0;
85
86 if (!uevent) {
87 if (conn->info.hpd == DCB_GPIO_UNUSED)
88 return -ENOSYS;
89 return 0;
90 }
91
92 if (argc != sizeof(args->v0) || args->v0.version != 0)
93 return -ENOSYS;
94
95 list_for_each_entry(outp, &conn->disp->outps, head) {
96 if (outp->info.connector == conn->index)
97 break;
98 }
99
100 if (&outp->head == &conn->disp->outps)
101 return -EINVAL;
102
103 if (outp->dp.aux && !outp->info.location) {
104 if (args->v0.types & NVIF_CONN_EVENT_V0_PLUG ) bits |= NVKM_I2C_PLUG;
105 if (args->v0.types & NVIF_CONN_EVENT_V0_UNPLUG) bits |= NVKM_I2C_UNPLUG;
106 if (args->v0.types & NVIF_CONN_EVENT_V0_IRQ ) bits |= NVKM_I2C_IRQ;
107
108 return nvkm_uevent_add(uevent, &device->i2c->event, outp->dp.aux->id, bits,
109 nvkm_uconn_uevent_aux);
110 }
111
112 if (args->v0.types & NVIF_CONN_EVENT_V0_PLUG ) bits |= NVKM_GPIO_HI;
113 if (args->v0.types & NVIF_CONN_EVENT_V0_UNPLUG) bits |= NVKM_GPIO_LO;
114 if (args->v0.types & NVIF_CONN_EVENT_V0_IRQ) {
115 /* TODO: support DP IRQ on ANX9805 and remove this hack. */
116 if (!outp->info.location && !nvkm_connector_is_dp_dms(conn->info.type))
117 return -EINVAL;
118 }
119
120 return nvkm_uevent_add(uevent, &device->gpio->event, conn->info.hpd, bits,
121 nvkm_uconn_uevent_gpio);
122 }
123
124 static int
nvkm_uconn_mthd_hpd_status(struct nvkm_conn * conn,void * argv,u32 argc)125 nvkm_uconn_mthd_hpd_status(struct nvkm_conn *conn, void *argv, u32 argc)
126 {
127 struct nvkm_gpio *gpio = conn->disp->engine.subdev.device->gpio;
128 union nvif_conn_hpd_status_args *args = argv;
129
130 if (argc != sizeof(args->v0) || args->v0.version != 0)
131 return -ENOSYS;
132
133 args->v0.support = gpio && conn->info.hpd != DCB_GPIO_UNUSED;
134 args->v0.present = 0;
135
136 if (args->v0.support) {
137 int ret = nvkm_gpio_get(gpio, 0, DCB_GPIO_UNUSED, conn->info.hpd);
138
139 if (WARN_ON(ret < 0)) {
140 args->v0.support = false;
141 return 0;
142 }
143
144 args->v0.present = ret;
145 }
146
147 return 0;
148 }
149
150 static int
nvkm_uconn_mthd(struct nvkm_object * object,u32 mthd,void * argv,u32 argc)151 nvkm_uconn_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
152 {
153 struct nvkm_conn *conn = nvkm_uconn(object);
154
155 switch (mthd) {
156 case NVIF_CONN_V0_HPD_STATUS: return nvkm_uconn_mthd_hpd_status(conn, argv, argc);
157 default:
158 break;
159 }
160
161 return -EINVAL;
162 }
163
164 static void *
nvkm_uconn_dtor(struct nvkm_object * object)165 nvkm_uconn_dtor(struct nvkm_object *object)
166 {
167 struct nvkm_conn *conn = nvkm_uconn(object);
168 struct nvkm_disp *disp = conn->disp;
169
170 spin_lock(&disp->client.lock);
171 conn->object.func = NULL;
172 spin_unlock(&disp->client.lock);
173 return NULL;
174 }
175
176 static const struct nvkm_object_func
177 nvkm_uconn = {
178 .dtor = nvkm_uconn_dtor,
179 .mthd = nvkm_uconn_mthd,
180 .uevent = nvkm_uconn_uevent,
181 };
182
183 int
nvkm_uconn_new(const struct nvkm_oclass * oclass,void * argv,u32 argc,struct nvkm_object ** pobject)184 nvkm_uconn_new(const struct nvkm_oclass *oclass, void *argv, u32 argc, struct nvkm_object **pobject)
185 {
186 struct nvkm_disp *disp = nvkm_udisp(oclass->parent);
187 struct nvkm_conn *cont, *conn = NULL;
188 union nvif_conn_args *args = argv;
189 int ret;
190
191 if (argc != sizeof(args->v0) || args->v0.version != 0)
192 return -ENOSYS;
193
194 list_for_each_entry(cont, &disp->conns, head) {
195 if (cont->index == args->v0.id) {
196 conn = cont;
197 break;
198 }
199 }
200
201 if (!conn)
202 return -EINVAL;
203
204 ret = -EBUSY;
205 spin_lock(&disp->client.lock);
206 if (!conn->object.func) {
207 nvkm_object_ctor(&nvkm_uconn, oclass, &conn->object);
208 *pobject = &conn->object;
209 ret = 0;
210 }
211 spin_unlock(&disp->client.lock);
212 return ret;
213 }
214