1/* $NetBSD: nouveau_nvkm_engine_disp_conn.c,v 1.3 2021/12/18 23:45:35 riastradh Exp $ */ 2 3/* 4 * Copyright 2014 Red Hat Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Ben Skeggs 25 */ 26#include <sys/cdefs.h> 27__KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_engine_disp_conn.c,v 1.3 2021/12/18 23:45:35 riastradh Exp $"); 28 29#include "conn.h" 30#include "outp.h" 31#include "priv.h" 32 33#include <subdev/gpio.h> 34 35#include <nvif/event.h> 36 37static int 38nvkm_conn_hpd(struct nvkm_notify *notify) 39{ 40 struct nvkm_conn *conn = container_of(notify, typeof(*conn), hpd); 41 struct nvkm_disp *disp = conn->disp; 42 struct nvkm_gpio *gpio = disp->engine.subdev.device->gpio; 43 const struct nvkm_gpio_ntfy_rep *line = notify->data; 44 struct nvif_notify_conn_rep_v0 rep; 45 int index = conn->index; 46 47 CONN_DBG(conn, "HPD: %d", line->mask); 48 49 if (!nvkm_gpio_get(gpio, 0, DCB_GPIO_UNUSED, conn->hpd.index)) 50 rep.mask = NVIF_NOTIFY_CONN_V0_UNPLUG; 51 else 52 rep.mask = NVIF_NOTIFY_CONN_V0_PLUG; 53 rep.version = 0; 54 55 nvkm_event_send(&disp->hpd, rep.mask, index, &rep, sizeof(rep)); 56 return NVKM_NOTIFY_KEEP; 57} 58 59void 60nvkm_conn_fini(struct nvkm_conn *conn) 61{ 62 nvkm_notify_put(&conn->hpd); 63} 64 65void 66nvkm_conn_init(struct nvkm_conn *conn) 67{ 68 nvkm_notify_get(&conn->hpd); 69} 70 71void 72nvkm_conn_del(struct nvkm_conn **pconn) 73{ 74 struct nvkm_conn *conn = *pconn; 75 if (conn) { 76 nvkm_notify_fini(&conn->hpd); 77 kfree(*pconn); 78 *pconn = NULL; 79 } 80} 81 82static void 83nvkm_conn_ctor(struct nvkm_disp *disp, int index, struct nvbios_connE *info, 84 struct nvkm_conn *conn) 85{ 86 static const u8 hpd[] = { 0x07, 0x08, 0x51, 0x52, 0x5e, 0x5f, 0x60 }; 87 struct nvkm_gpio *gpio = disp->engine.subdev.device->gpio; 88 struct dcb_gpio_func func; 89 int ret; 90 91 conn->disp = disp; 92 conn->index = index; 93 conn->info = *info; 94 95 CONN_DBG(conn, "type %02x loc %d hpd %02x dp %x di %x sr %x lcdid %x", 96 info->type, info->location, info->hpd, info->dp, 97 info->di, info->sr, info->lcdid); 98 99 if ((info->hpd = ffs(info->hpd))) { 100 if (--info->hpd >= ARRAY_SIZE(hpd)) { 101 CONN_ERR(conn, "hpd %02x unknown", info->hpd); 102 return; 103 } 104 info->hpd = hpd[info->hpd]; 105 106 ret = nvkm_gpio_find(gpio, 0, info->hpd, DCB_GPIO_UNUSED, &func); 107 if (ret) { 108 CONN_ERR(conn, "func %02x lookup failed, %d", 109 info->hpd, ret); 110 return; 111 } 112 113 ret = nvkm_notify_init(NULL, &gpio->event, nvkm_conn_hpd, 114 true, &(struct nvkm_gpio_ntfy_req) { 115 .mask = NVKM_GPIO_TOGGLED, 116 .line = func.line, 117 }, 118 sizeof(struct nvkm_gpio_ntfy_req), 119 sizeof(struct nvkm_gpio_ntfy_rep), 120 &conn->hpd); 121 if (ret) { 122 CONN_ERR(conn, "func %02x failed, %d", info->hpd, ret); 123 } else { 124 CONN_DBG(conn, "func %02x (HPD)", info->hpd); 125 } 126 } 127} 128 129int 130nvkm_conn_new(struct nvkm_disp *disp, int index, struct nvbios_connE *info, 131 struct nvkm_conn **pconn) 132{ 133 if (!(*pconn = kzalloc(sizeof(**pconn), GFP_KERNEL))) 134 return -ENOMEM; 135 nvkm_conn_ctor(disp, index, info, *pconn); 136 return 0; 137} 138