1 /* 2 * Copyright 2021 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 #define nvkm_uconn(p) container_of((p), struct nvkm_conn, object) 23 #include "conn.h" 24 #include "outp.h" 25 26 #include <core/client.h> 27 #include <core/event.h> 28 #include <subdev/gpio.h> 29 #include <subdev/i2c.h> 30 31 #include <nvif/if0011.h> 32 33 static int 34 nvkm_uconn_uevent_aux(struct nvkm_object *object, u64 token, u32 bits) 35 { 36 union nvif_conn_event_args args; 37 38 args.v0.version = 0; 39 args.v0.types = 0; 40 if (bits & NVKM_I2C_PLUG) 41 args.v0.types |= NVIF_CONN_EVENT_V0_PLUG; 42 if (bits & NVKM_I2C_UNPLUG) 43 args.v0.types |= NVIF_CONN_EVENT_V0_UNPLUG; 44 if (bits & NVKM_I2C_IRQ) 45 args.v0.types |= NVIF_CONN_EVENT_V0_IRQ; 46 47 return object->client->event(token, &args, sizeof(args.v0)); 48 } 49 50 static int 51 nvkm_uconn_uevent_gpio(struct nvkm_object *object, u64 token, u32 bits) 52 { 53 union nvif_conn_event_args args; 54 55 args.v0.version = 0; 56 args.v0.types = 0; 57 if (bits & NVKM_GPIO_HI) 58 args.v0.types |= NVIF_CONN_EVENT_V0_PLUG; 59 if (bits & NVKM_GPIO_LO) 60 args.v0.types |= NVIF_CONN_EVENT_V0_UNPLUG; 61 62 return object->client->event(token, &args, sizeof(args.v0)); 63 } 64 65 static int 66 nvkm_uconn_uevent(struct nvkm_object *object, void *argv, u32 argc, struct nvkm_uevent *uevent) 67 { 68 struct nvkm_conn *conn = nvkm_uconn(object); 69 struct nvkm_device *device = conn->disp->engine.subdev.device; 70 struct nvkm_outp *outp; 71 union nvif_conn_event_args *args = argv; 72 u64 bits = 0; 73 74 if (!uevent) { 75 if (conn->info.hpd == DCB_GPIO_UNUSED) 76 return -ENOSYS; 77 return 0; 78 } 79 80 if (argc != sizeof(args->v0) || args->v0.version != 0) 81 return -ENOSYS; 82 83 list_for_each_entry(outp, &conn->disp->outps, head) { 84 if (outp->info.connector == conn->index && outp->dp.aux) { 85 if (args->v0.types & NVIF_CONN_EVENT_V0_PLUG ) bits |= NVKM_I2C_PLUG; 86 if (args->v0.types & NVIF_CONN_EVENT_V0_UNPLUG) bits |= NVKM_I2C_UNPLUG; 87 if (args->v0.types & NVIF_CONN_EVENT_V0_IRQ ) bits |= NVKM_I2C_IRQ; 88 89 return nvkm_uevent_add(uevent, &device->i2c->event, outp->dp.aux->id, bits, 90 nvkm_uconn_uevent_aux); 91 } 92 } 93 94 if (args->v0.types & NVIF_CONN_EVENT_V0_PLUG ) bits |= NVKM_GPIO_HI; 95 if (args->v0.types & NVIF_CONN_EVENT_V0_UNPLUG) bits |= NVKM_GPIO_LO; 96 if (args->v0.types & NVIF_CONN_EVENT_V0_IRQ) 97 return -EINVAL; 98 99 return nvkm_uevent_add(uevent, &device->gpio->event, conn->info.hpd, bits, 100 nvkm_uconn_uevent_gpio); 101 } 102 103 static int 104 nvkm_uconn_mthd_hpd_status(struct nvkm_conn *conn, void *argv, u32 argc) 105 { 106 struct nvkm_gpio *gpio = conn->disp->engine.subdev.device->gpio; 107 union nvif_conn_hpd_status_args *args = argv; 108 109 if (argc != sizeof(args->v0) || args->v0.version != 0) 110 return -ENOSYS; 111 112 args->v0.support = gpio && conn->info.hpd != DCB_GPIO_UNUSED; 113 args->v0.present = 0; 114 115 if (args->v0.support) { 116 int ret = nvkm_gpio_get(gpio, 0, DCB_GPIO_UNUSED, conn->info.hpd); 117 118 if (WARN_ON(ret < 0)) { 119 args->v0.support = false; 120 return 0; 121 } 122 123 args->v0.present = ret; 124 } 125 126 return 0; 127 } 128 129 static int 130 nvkm_uconn_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc) 131 { 132 struct nvkm_conn *conn = nvkm_uconn(object); 133 134 switch (mthd) { 135 case NVIF_CONN_V0_HPD_STATUS: return nvkm_uconn_mthd_hpd_status(conn, argv, argc); 136 default: 137 break; 138 } 139 140 return -EINVAL; 141 } 142 143 static void * 144 nvkm_uconn_dtor(struct nvkm_object *object) 145 { 146 struct nvkm_conn *conn = nvkm_uconn(object); 147 struct nvkm_disp *disp = conn->disp; 148 149 spin_lock(&disp->client.lock); 150 conn->object.func = NULL; 151 spin_unlock(&disp->client.lock); 152 return NULL; 153 } 154 155 static const struct nvkm_object_func 156 nvkm_uconn = { 157 .dtor = nvkm_uconn_dtor, 158 .mthd = nvkm_uconn_mthd, 159 .uevent = nvkm_uconn_uevent, 160 }; 161 162 int 163 nvkm_uconn_new(const struct nvkm_oclass *oclass, void *argv, u32 argc, struct nvkm_object **pobject) 164 { 165 struct nvkm_disp *disp = nvkm_udisp(oclass->parent); 166 struct nvkm_conn *cont, *conn = NULL; 167 union nvif_conn_args *args = argv; 168 int ret; 169 170 if (argc != sizeof(args->v0) || args->v0.version != 0) 171 return -ENOSYS; 172 173 list_for_each_entry(cont, &disp->conns, head) { 174 if (cont->index == args->v0.id) { 175 conn = cont; 176 break; 177 } 178 } 179 180 if (!conn) 181 return -EINVAL; 182 183 ret = -EBUSY; 184 spin_lock(&disp->client.lock); 185 if (!conn->object.func) { 186 nvkm_object_ctor(&nvkm_uconn, oclass, &conn->object); 187 *pobject = &conn->object; 188 ret = 0; 189 } 190 spin_unlock(&disp->client.lock); 191 return ret; 192 } 193