118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
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/*
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* Copyright 2021 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#define nvkm_uconn(p) container_of((p), struct nvkm_conn, object)
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#include "conn.h"
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#include <subdev/gpio.h>
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#include <nvif/if0011.h>
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static int
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nvkm_uconn_mthd_hpd_status(struct nvkm_conn *conn, void *argv, u32 argc)
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{
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struct nvkm_gpio *gpio = conn->disp->engine.subdev.device->gpio;
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union nvif_conn_hpd_status_args *args = argv;
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if (argc != sizeof(args->v0) || args->v0.version != 0)
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return -ENOSYS;
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args->v0.support = gpio && conn->info.hpd != DCB_GPIO_UNUSED;
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args->v0.present = 0;
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if (args->v0.support) {
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int ret = nvkm_gpio_get(gpio, 0, DCB_GPIO_UNUSED, conn->info.hpd);
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if (WARN_ON(ret < 0)) {
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args->v0.support = false;
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return 0;
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}
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args->v0.present = ret;
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}
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return 0;
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}
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static int
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nvkm_uconn_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
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{
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struct nvkm_conn *conn = nvkm_uconn(object);
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switch (mthd) {
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case NVIF_CONN_V0_HPD_STATUS: return nvkm_uconn_mthd_hpd_status(conn, argv, argc);
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default:
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break;
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}
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return -EINVAL;
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}
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static void *
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nvkm_uconn_dtor(struct nvkm_object *object)
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{
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struct nvkm_conn *conn = nvkm_uconn(object);
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struct nvkm_disp *disp = conn->disp;
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spin_lock(&disp->client.lock);
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conn->object.func = NULL;
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spin_unlock(&disp->client.lock);
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return NULL;
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}
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static const struct nvkm_object_func
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nvkm_uconn = {
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.dtor = nvkm_uconn_dtor,
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.mthd = nvkm_uconn_mthd,
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};
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int
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nvkm_uconn_new(const struct nvkm_oclass *oclass, void *argv, u32 argc, struct nvkm_object **pobject)
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{
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struct nvkm_disp *disp = nvkm_udisp(oclass->parent);
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struct nvkm_conn *cont, *conn = NULL;
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union nvif_conn_args *args = argv;
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int ret;
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if (argc != sizeof(args->v0) || args->v0.version != 0)
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return -ENOSYS;
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list_for_each_entry(cont, &disp->conns, head) {
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if (cont->index == args->v0.id) {
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conn = cont;
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break;
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}
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}
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if (!conn)
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return -EINVAL;
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ret = -EBUSY;
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spin_lock(&disp->client.lock);
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if (!conn->object.func) {
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nvkm_object_ctor(&nvkm_uconn, oclass, &conn->object);
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*pobject = &conn->object;
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ret = 0;
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}
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spin_unlock(&disp->client.lock);
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return ret;
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}
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