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
32 void
nvkm_conn_del(struct nvkm_conn ** pconn)33 nvkm_conn_del(struct nvkm_conn **pconn)
34 {
35 struct nvkm_conn *conn = *pconn;
36 if (conn) {
37 kfree(*pconn);
38 *pconn = NULL;
39 }
40 }
41
42 static void
nvkm_conn_ctor(struct nvkm_disp * disp,int index,struct nvbios_connE * info,struct nvkm_conn * conn)43 nvkm_conn_ctor(struct nvkm_disp *disp, int index, struct nvbios_connE *info,
44 struct nvkm_conn *conn)
45 {
46 static const u8 hpd[] = { 0x07, 0x08, 0x51, 0x52, 0x5e, 0x5f, 0x60 };
47 struct nvkm_gpio *gpio = disp->engine.subdev.device->gpio;
48 struct dcb_gpio_func func;
49 int ret;
50
51 conn->disp = disp;
52 conn->index = index;
53 conn->info = *info;
54 conn->info.hpd = DCB_GPIO_UNUSED;
55
56 CONN_DBG(conn, "type %02x loc %d hpd %02x dp %x di %x sr %x lcdid %x",
57 info->type, info->location, info->hpd, info->dp,
58 info->di, info->sr, info->lcdid);
59
60 if ((info->hpd = ffs(info->hpd))) {
61 if (--info->hpd >= ARRAY_SIZE(hpd)) {
62 CONN_ERR(conn, "hpd %02x unknown", info->hpd);
63 return;
64 }
65 info->hpd = hpd[info->hpd];
66
67 ret = nvkm_gpio_find(gpio, 0, info->hpd, DCB_GPIO_UNUSED, &func);
68 if (ret) {
69 CONN_ERR(conn, "func %02x lookup failed, %d", info->hpd, ret);
70 return;
71 }
72
73 conn->info.hpd = func.line;
74 }
75 }
76
77 int
nvkm_conn_new(struct nvkm_disp * disp,int index,struct nvbios_connE * info,struct nvkm_conn ** pconn)78 nvkm_conn_new(struct nvkm_disp *disp, int index, struct nvbios_connE *info,
79 struct nvkm_conn **pconn)
80 {
81 if (!(*pconn = kzalloc(sizeof(**pconn), GFP_KERNEL)))
82 return -ENOMEM;
83 nvkm_conn_ctor(disp, index, info, *pconn);
84 return 0;
85 }
86