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