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 static int 33 nvkm_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 54 void 55 nvkm_conn_fini(struct nvkm_conn *conn) 56 { 57 nvkm_notify_put(&conn->hpd); 58 } 59 60 void 61 nvkm_conn_init(struct nvkm_conn *conn) 62 { 63 nvkm_notify_get(&conn->hpd); 64 } 65 66 void 67 nvkm_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 77 static void 78 nvkm_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 conn->info.hpd = DCB_GPIO_UNUSED; 90 91 CONN_DBG(conn, "type %02x loc %d hpd %02x dp %x di %x sr %x lcdid %x", 92 info->type, info->location, info->hpd, info->dp, 93 info->di, info->sr, info->lcdid); 94 95 if ((info->hpd = ffs(info->hpd))) { 96 if (--info->hpd >= ARRAY_SIZE(hpd)) { 97 CONN_ERR(conn, "hpd %02x unknown", info->hpd); 98 return; 99 } 100 info->hpd = hpd[info->hpd]; 101 102 ret = nvkm_gpio_find(gpio, 0, info->hpd, DCB_GPIO_UNUSED, &func); 103 if (ret) { 104 CONN_ERR(conn, "func %02x lookup failed, %d", info->hpd, ret); 105 return; 106 } 107 108 conn->info.hpd = func.line; 109 110 ret = nvkm_notify_init(NULL, &gpio->event, nvkm_conn_hpd, 111 true, &(struct nvkm_gpio_ntfy_req) { 112 .mask = NVKM_GPIO_TOGGLED, 113 .line = func.line, 114 }, 115 sizeof(struct nvkm_gpio_ntfy_req), 116 sizeof(struct nvkm_gpio_ntfy_rep), 117 &conn->hpd); 118 if (ret) { 119 CONN_ERR(conn, "func %02x failed, %d", info->hpd, ret); 120 } else { 121 CONN_DBG(conn, "func %02x (HPD)", info->hpd); 122 } 123 } 124 } 125 126 int 127 nvkm_conn_new(struct nvkm_disp *disp, int index, struct nvbios_connE *info, 128 struct nvkm_conn **pconn) 129 { 130 if (!(*pconn = kzalloc(sizeof(**pconn), GFP_KERNEL))) 131 return -ENOMEM; 132 nvkm_conn_ctor(disp, index, info, *pconn); 133 return 0; 134 } 135