1 /* $NetBSD: nouveau_nvkm_engine_disp_conn.c,v 1.3 2021/12/18 23:45:35 riastradh Exp $ */
2
3 /*
4 * Copyright 2014 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
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_engine_disp_conn.c,v 1.3 2021/12/18 23:45:35 riastradh Exp $");
28
29 #include "conn.h"
30 #include "outp.h"
31 #include "priv.h"
32
33 #include <subdev/gpio.h>
34
35 #include <nvif/event.h>
36
37 static int
nvkm_conn_hpd(struct nvkm_notify * notify)38 nvkm_conn_hpd(struct nvkm_notify *notify)
39 {
40 struct nvkm_conn *conn = container_of(notify, typeof(*conn), hpd);
41 struct nvkm_disp *disp = conn->disp;
42 struct nvkm_gpio *gpio = disp->engine.subdev.device->gpio;
43 const struct nvkm_gpio_ntfy_rep *line = notify->data;
44 struct nvif_notify_conn_rep_v0 rep;
45 int index = conn->index;
46
47 CONN_DBG(conn, "HPD: %d", line->mask);
48
49 if (!nvkm_gpio_get(gpio, 0, DCB_GPIO_UNUSED, conn->hpd.index))
50 rep.mask = NVIF_NOTIFY_CONN_V0_UNPLUG;
51 else
52 rep.mask = NVIF_NOTIFY_CONN_V0_PLUG;
53 rep.version = 0;
54
55 nvkm_event_send(&disp->hpd, rep.mask, index, &rep, sizeof(rep));
56 return NVKM_NOTIFY_KEEP;
57 }
58
59 void
nvkm_conn_fini(struct nvkm_conn * conn)60 nvkm_conn_fini(struct nvkm_conn *conn)
61 {
62 nvkm_notify_put(&conn->hpd);
63 }
64
65 void
nvkm_conn_init(struct nvkm_conn * conn)66 nvkm_conn_init(struct nvkm_conn *conn)
67 {
68 nvkm_notify_get(&conn->hpd);
69 }
70
71 void
nvkm_conn_del(struct nvkm_conn ** pconn)72 nvkm_conn_del(struct nvkm_conn **pconn)
73 {
74 struct nvkm_conn *conn = *pconn;
75 if (conn) {
76 nvkm_notify_fini(&conn->hpd);
77 kfree(*pconn);
78 *pconn = NULL;
79 }
80 }
81
82 static void
nvkm_conn_ctor(struct nvkm_disp * disp,int index,struct nvbios_connE * info,struct nvkm_conn * conn)83 nvkm_conn_ctor(struct nvkm_disp *disp, int index, struct nvbios_connE *info,
84 struct nvkm_conn *conn)
85 {
86 static const u8 hpd[] = { 0x07, 0x08, 0x51, 0x52, 0x5e, 0x5f, 0x60 };
87 struct nvkm_gpio *gpio = disp->engine.subdev.device->gpio;
88 struct dcb_gpio_func func;
89 int ret;
90
91 conn->disp = disp;
92 conn->index = index;
93 conn->info = *info;
94
95 CONN_DBG(conn, "type %02x loc %d hpd %02x dp %x di %x sr %x lcdid %x",
96 info->type, info->location, info->hpd, info->dp,
97 info->di, info->sr, info->lcdid);
98
99 if ((info->hpd = ffs(info->hpd))) {
100 if (--info->hpd >= ARRAY_SIZE(hpd)) {
101 CONN_ERR(conn, "hpd %02x unknown", info->hpd);
102 return;
103 }
104 info->hpd = hpd[info->hpd];
105
106 ret = nvkm_gpio_find(gpio, 0, info->hpd, DCB_GPIO_UNUSED, &func);
107 if (ret) {
108 CONN_ERR(conn, "func %02x lookup failed, %d",
109 info->hpd, ret);
110 return;
111 }
112
113 ret = nvkm_notify_init(NULL, &gpio->event, nvkm_conn_hpd,
114 true, &(struct nvkm_gpio_ntfy_req) {
115 .mask = NVKM_GPIO_TOGGLED,
116 .line = func.line,
117 },
118 sizeof(struct nvkm_gpio_ntfy_req),
119 sizeof(struct nvkm_gpio_ntfy_rep),
120 &conn->hpd);
121 if (ret) {
122 CONN_ERR(conn, "func %02x failed, %d", info->hpd, ret);
123 } else {
124 CONN_DBG(conn, "func %02x (HPD)", info->hpd);
125 }
126 }
127 }
128
129 int
nvkm_conn_new(struct nvkm_disp * disp,int index,struct nvbios_connE * info,struct nvkm_conn ** pconn)130 nvkm_conn_new(struct nvkm_disp *disp, int index, struct nvbios_connE *info,
131 struct nvkm_conn **pconn)
132 {
133 if (!(*pconn = kzalloc(sizeof(**pconn), GFP_KERNEL)))
134 return -ENOMEM;
135 nvkm_conn_ctor(disp, index, info, *pconn);
136 return 0;
137 }
138