1/* $NetBSD: nouveau_nvkm_engine_disp_head.c,v 1.2 2021/12/18 23:45:35 riastradh Exp $ */ 2 3/* 4 * Copyright 2017 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 <bskeggs@redhat.com> 25 */ 26#include <sys/cdefs.h> 27__KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_engine_disp_head.c,v 1.2 2021/12/18 23:45:35 riastradh Exp $"); 28 29#include "head.h" 30 31#include <core/client.h> 32 33#include <nvif/cl0046.h> 34#include <nvif/unpack.h> 35 36struct nvkm_head * 37nvkm_head_find(struct nvkm_disp *disp, int id) 38{ 39 struct nvkm_head *head; 40 list_for_each_entry(head, &disp->head, head) { 41 if (head->id == id) 42 return head; 43 } 44 return NULL; 45} 46 47int 48nvkm_head_mthd_scanoutpos(struct nvkm_object *object, 49 struct nvkm_head *head, void *data, u32 size) 50{ 51 union { 52 struct nv04_disp_scanoutpos_v0 v0; 53 } *args = data; 54 int ret = -ENOSYS; 55 56 nvif_ioctl(object, "head scanoutpos size %d\n", size); 57 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) { 58 nvif_ioctl(object, "head scanoutpos vers %d\n", 59 args->v0.version); 60 61 head->func->state(head, &head->arm); 62 args->v0.vtotal = head->arm.vtotal; 63 args->v0.vblanks = head->arm.vblanks; 64 args->v0.vblanke = head->arm.vblanke; 65 args->v0.htotal = head->arm.htotal; 66 args->v0.hblanks = head->arm.hblanks; 67 args->v0.hblanke = head->arm.hblanke; 68 69 /* We don't support reading htotal/vtotal on pre-NV50 VGA, 70 * so we have to give up and trigger the timestamping 71 * fallback in the drm core. 72 */ 73 if (!args->v0.vtotal || !args->v0.htotal) 74 return -ENOTSUPP; 75 76 args->v0.time[0] = ktime_to_ns(ktime_get()); 77 head->func->rgpos(head, &args->v0.hline, &args->v0.vline); 78 args->v0.time[1] = ktime_to_ns(ktime_get()); 79 } else 80 return ret; 81 82 return 0; 83} 84 85void 86nvkm_head_del(struct nvkm_head **phead) 87{ 88 struct nvkm_head *head = *phead; 89 if (head) { 90 HEAD_DBG(head, "dtor"); 91 list_del(&head->head); 92 kfree(*phead); 93 *phead = NULL; 94 } 95} 96 97int 98nvkm_head_new_(const struct nvkm_head_func *func, 99 struct nvkm_disp *disp, int id) 100{ 101 struct nvkm_head *head; 102 if (!(head = kzalloc(sizeof(*head), GFP_KERNEL))) 103 return -ENOMEM; 104 head->func = func; 105 head->disp = disp; 106 head->id = id; 107 list_add_tail(&head->head, &disp->head); 108 HEAD_DBG(head, "ctor"); 109 return 0; 110} 111