86 lines · c
1/*2 * Copyright 2014 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: Ben Skeggs23 */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 32void33nvkm_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 42static void43nvkm_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 77int78nvkm_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