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 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 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 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