conn.c (3760B)
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_conn_hpd(struct nvkm_notify *notify) 34{ 35 struct nvkm_conn *conn = container_of(notify, typeof(*conn), hpd); 36 struct nvkm_disp *disp = conn->disp; 37 struct nvkm_gpio *gpio = disp->engine.subdev.device->gpio; 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 CONN_DBG(conn, "HPD: %d", line->mask); 43 44 if (!nvkm_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 54void 55nvkm_conn_fini(struct nvkm_conn *conn) 56{ 57 nvkm_notify_put(&conn->hpd); 58} 59 60void 61nvkm_conn_init(struct nvkm_conn *conn) 62{ 63 nvkm_notify_get(&conn->hpd); 64} 65 66void 67nvkm_conn_del(struct nvkm_conn **pconn) 68{ 69 struct nvkm_conn *conn = *pconn; 70 if (conn) { 71 nvkm_notify_fini(&conn->hpd); 72 kfree(*pconn); 73 *pconn = NULL; 74 } 75} 76 77static void 78nvkm_conn_ctor(struct nvkm_disp *disp, int index, struct nvbios_connE *info, 79 struct nvkm_conn *conn) 80{ 81 static const u8 hpd[] = { 0x07, 0x08, 0x51, 0x52, 0x5e, 0x5f, 0x60 }; 82 struct nvkm_gpio *gpio = disp->engine.subdev.device->gpio; 83 struct dcb_gpio_func func; 84 int ret; 85 86 conn->disp = disp; 87 conn->index = index; 88 conn->info = *info; 89 90 CONN_DBG(conn, "type %02x loc %d hpd %02x dp %x di %x sr %x lcdid %x", 91 info->type, info->location, info->hpd, info->dp, 92 info->di, info->sr, info->lcdid); 93 94 if ((info->hpd = ffs(info->hpd))) { 95 if (--info->hpd >= ARRAY_SIZE(hpd)) { 96 CONN_ERR(conn, "hpd %02x unknown", info->hpd); 97 return; 98 } 99 info->hpd = hpd[info->hpd]; 100 101 ret = nvkm_gpio_find(gpio, 0, info->hpd, DCB_GPIO_UNUSED, &func); 102 if (ret) { 103 CONN_ERR(conn, "func %02x lookup failed, %d", 104 info->hpd, ret); 105 return; 106 } 107 108 ret = nvkm_notify_init(NULL, &gpio->event, nvkm_conn_hpd, 109 true, &(struct nvkm_gpio_ntfy_req) { 110 .mask = NVKM_GPIO_TOGGLED, 111 .line = func.line, 112 }, 113 sizeof(struct nvkm_gpio_ntfy_req), 114 sizeof(struct nvkm_gpio_ntfy_rep), 115 &conn->hpd); 116 if (ret) { 117 CONN_ERR(conn, "func %02x failed, %d", info->hpd, ret); 118 } else { 119 CONN_DBG(conn, "func %02x (HPD)", info->hpd); 120 } 121 } 122} 123 124int 125nvkm_conn_new(struct nvkm_disp *disp, int index, struct nvbios_connE *info, 126 struct nvkm_conn **pconn) 127{ 128 if (!(*pconn = kzalloc(sizeof(**pconn), GFP_KERNEL))) 129 return -ENOMEM; 130 nvkm_conn_ctor(disp, index, info, *pconn); 131 return 0; 132}