1/*
2 * Copyright 2014 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 * Authors: Ben Skeggs
23 */
24#include "conn.h"
25#include "outp.h"
26#include "priv.h"
27
28#include <subdev/gpio.h>
29
30#include <nvif/event.h>
31
32static int
33nvkm_connector_hpd(struct nvkm_notify *notify)
34{
35	struct nvkm_connector *conn = container_of(notify, typeof(*conn), hpd);
36	struct nvkm_disp *disp = nvkm_disp(conn);
37	struct nvkm_gpio *gpio = nvkm_gpio(conn);
38	const struct nvkm_gpio_ntfy_rep *line = notify->data;
39	struct nvif_notify_conn_rep_v0 rep;
40	int index = conn->index;
41
42	DBG("HPD: %d\n", line->mask);
43
44	if (!gpio->get(gpio, 0, DCB_GPIO_UNUSED, conn->hpd.index))
45		rep.mask = NVIF_NOTIFY_CONN_V0_UNPLUG;
46	else
47		rep.mask = NVIF_NOTIFY_CONN_V0_PLUG;
48	rep.version = 0;
49
50	nvkm_event_send(&disp->hpd, rep.mask, index, &rep, sizeof(rep));
51	return NVKM_NOTIFY_KEEP;
52}
53
54int
55_nvkm_connector_fini(struct nvkm_object *object, bool suspend)
56{
57	struct nvkm_connector *conn = (void *)object;
58	nvkm_notify_put(&conn->hpd);
59	return nvkm_object_fini(&conn->base, suspend);
60}
61
62int
63_nvkm_connector_init(struct nvkm_object *object)
64{
65	struct nvkm_connector *conn = (void *)object;
66	int ret = nvkm_object_init(&conn->base);
67	if (ret == 0)
68		nvkm_notify_get(&conn->hpd);
69	return ret;
70}
71
72void
73_nvkm_connector_dtor(struct nvkm_object *object)
74{
75	struct nvkm_connector *conn = (void *)object;
76	nvkm_notify_fini(&conn->hpd);
77	nvkm_object_destroy(&conn->base);
78}
79
80int
81nvkm_connector_create_(struct nvkm_object *parent,
82		       struct nvkm_object *engine,
83		       struct nvkm_oclass *oclass,
84		       struct nvbios_connE *info, int index,
85		       int length, void **pobject)
86{
87	static const u8 hpd[] = { 0x07, 0x08, 0x51, 0x52, 0x5e, 0x5f, 0x60 };
88	struct nvkm_disp *disp = nvkm_disp(parent);
89	struct nvkm_gpio *gpio = nvkm_gpio(parent);
90	struct nvkm_connector *conn;
91	struct nvkm_output *outp;
92	struct dcb_gpio_func func;
93	int ret;
94
95	list_for_each_entry(outp, &disp->outp, head) {
96		if (outp->conn && outp->conn->index == index) {
97			atomic_inc(&nv_object(outp->conn)->refcount);
98			*pobject = outp->conn;
99			return 1;
100		}
101	}
102
103	ret = nvkm_object_create_(parent, engine, oclass, 0, length, pobject);
104	conn = *pobject;
105	if (ret)
106		return ret;
107
108	conn->info = *info;
109	conn->index = index;
110
111	DBG("type %02x loc %d hpd %02x dp %x di %x sr %x lcdid %x\n",
112	    info->type, info->location, info->hpd, info->dp,
113	    info->di, info->sr, info->lcdid);
114
115	if ((info->hpd = ffs(info->hpd))) {
116		if (--info->hpd >= ARRAY_SIZE(hpd)) {
117			ERR("hpd %02x unknown\n", info->hpd);
118			return 0;
119		}
120		info->hpd = hpd[info->hpd];
121
122		ret = gpio->find(gpio, 0, info->hpd, DCB_GPIO_UNUSED, &func);
123		if (ret) {
124			ERR("func %02x lookup failed, %d\n", info->hpd, ret);
125			return 0;
126		}
127
128		ret = nvkm_notify_init(NULL, &gpio->event, nvkm_connector_hpd,
129				       true, &(struct nvkm_gpio_ntfy_req) {
130					.mask = NVKM_GPIO_TOGGLED,
131					.line = func.line,
132				       },
133				       sizeof(struct nvkm_gpio_ntfy_req),
134				       sizeof(struct nvkm_gpio_ntfy_rep),
135				       &conn->hpd);
136		if (ret) {
137			ERR("func %02x failed, %d\n", info->hpd, ret);
138		} else {
139			DBG("func %02x (HPD)\n", info->hpd);
140		}
141	}
142
143	return 0;
144}
145
146int
147_nvkm_connector_ctor(struct nvkm_object *parent,
148		     struct nvkm_object *engine,
149		     struct nvkm_oclass *oclass, void *info, u32 index,
150		     struct nvkm_object **pobject)
151{
152	struct nvkm_connector *conn;
153	int ret;
154
155	ret = nvkm_connector_create(parent, engine, oclass, info, index, &conn);
156	*pobject = nv_object(conn);
157	if (ret)
158		return ret;
159
160	return 0;
161}
162
163struct nvkm_oclass *
164nvkm_connector_oclass = &(struct nvkm_connector_impl) {
165	.base = {
166		.handle = 0,
167		.ofuncs = &(struct nvkm_ofuncs) {
168			.ctor = _nvkm_connector_ctor,
169			.dtor = _nvkm_connector_dtor,
170			.init = _nvkm_connector_init,
171			.fini = _nvkm_connector_fini,
172		},
173	},
174}.base;
175